Academic literature on the topic 'Matrix interference'

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Journal articles on the topic "Matrix interference"

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Fu, Jin, Wenfeng Dong, Longhao Qiu, Chunpeng Zhao, and Zherui Wang. "Self-Interference Suppression of Unmanned Underwater Vehicle with Vector Hydrophone Array Based on an Improved Autoencoder." Journal of Marine Science and Engineering 11, no. 7 (2023): 1358. http://dx.doi.org/10.3390/jmse11071358.

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The self-interference of an unmanned underwater vehicle (UUV) weakens its ability to detect targets of interest. Due to limitations in the size of the sonar array and the complexity of the interference, the performance of existing self-interference suppression methods in practical applications is unsatisfactory. Our research focuses on analyzing the influence of near-field interferences on the sample covariance matrix (SCM) and proposes an interference suppression algorithm based on an improved autoencoder. The proposed algorithm effectively learns the feature distribution of near-field interferences within the covariance domain and reconstructs the pure signal covariance matrix through the cancellation of the near-field interference features. Moreover, the proposed algorithm can meet the requirements of real-time processing and does not require prior knowledge about the positions or propagation of interference. Simulations demonstrate that the proposed algorithm outperforms comparison methods, particularly in scenarios with low signal-to-interference ratios and a limited number of sensors. Furthermore, lake experiments provide additional evidence of the proposed algorithm’s good performance in practical applications.
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Pan, Shuai, Yongshun Zhang, Qichao Ge, Renrong Hu, and Chong Yan. "Multi-mainlobe Interferences Suppression Based on Interference Covariance Matrix Reconstruction." Journal of Physics: Conference Series 1176 (March 2019): 042011. http://dx.doi.org/10.1088/1742-6596/1176/4/042011.

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Lei, Guoping, Hongliang He, Ke Xiao, and Minlu Dai. "Analysis and Research on the Structure Selection of BeiDou Navigation Array Antenna Based on Optimized PI Algorithm." International Journal of Pattern Recognition and Artificial Intelligence 34, no. 02 (2019): 2058002. http://dx.doi.org/10.1142/s0218001420580021.

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To overcome the disadvantages of the traditional power inversion algorithm, which has obvious suppression effect on strong interference signals but unobvious effect on suppression of weak interference signals, a matrix decomposition method is proposed to extract the interference sub-matrix and noise sub-matrix, so that the power inversion algorithm can be adopted to weaken and filter out the signals in the case of weak interference. Through the optimized power inversion algorithm, the interference signal can be weakened obviously at the antenna receiving end, and the quality of the effective signal received by the antenna can be improved significantly. Afterwards, the algorithm was used to carry out MATLAB simulation in space based on the anti-jamming performance of different array models, which determined the anti-jamming antenna array structure as a uniform matrix and optimized the array structure. The simulation results show that the optimized power inversion algorithm can filter strong and weak interference better, and the anti-jamming performance is better under different array models and two kinds of interferences. Through comparative analysis, it is concluded that the four elements have the best interference suppression effect in uniform circular array structure, which provides an important reference for the selection of antenna array in adaptive interference suppression hardware structure. At the same time, the BeiDou four-element adaptive circular array antenna, as an important part of intelligent geological disaster monitoring and early warning system, has good anti-jamming ability.
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Wu, Zhixia, Shengqi Zhu, Jingwei Xu, Lan Lan, Ximin Li, and Yiqun Zhang. "Frequency Increment Design Method of MR-FDA-MIMO Radar for Interference Suppression." Remote Sensing 15, no. 16 (2023): 4070. http://dx.doi.org/10.3390/rs15164070.

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In the present complex electromagnetic environment, radar target detection is threatened by different kinds of interferences, especially mainlobe deceptive interference, which occupies the same energy distributions of targets spatially, meaning that targets and interferences cannot be discriminated. To make matters worse, the number of suppressible interferences is limited by the number of physical array elements, leading to the degradation of the suppression performance of traditional radar. In this work, we propose a frequency-increment-based interference suppression method for minimum redundancy frequency diverse array multiple-input multiple-output (MR-FDA-MIMO) radar, which effectively solves the aforementioned two problems. The interference suppression method consists of two steps: (i) in the sidelobe barrage interference suppression stage, the interference-plus-noise covariance matrix is reconstructed to overcome the influence of the true targets and mainlobe deceptive interference on the performance of the beamformer; (ii) in the mainlobe deceptive interference suppression stage, a nonadaptive beamforming method is employed to suppress mainlobe deceptive interference and overcome the impact of insufficient virtual samples on interference suppression performance. Additionally, we design a frequency-increment-based MR-FDA-MIMO radar, fully utilizing the advantages of the virtual array to enhance interference suppression performance and increase the number of interferences. Numerical experiments undertaken demonstrate the effectiveness of the algorithm under different scenarios.
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Aghajani, Rouhollah, and Maryam Nilforosh. "SINR Enhancement in Co-located MIMO RADAR with Multiple Targets." Radar 8, no. 2 (2021): 1–8. https://doi.org/10.5281/zenodo.5689165.

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This paper focuses on improving the signal-to-noise plus interference ratio on multi-input multi-output radars. Here, an algorithm is proposed, whereby the waveform of the transmitter and the receiver filter coefficients are designed simultaneously to better detect the targets in the presence of the dependent interference signal. The proposed algorithm is a convex optimization-based sequential algorithm, in which each iteration optimizes the covariance matrix of the transmitted signals to concentrate the antenna radiation pattern on the target and also attempts to eliminate the maximum number of interferencein the receiver. The problem is in addition to limiting the use of identical RF circuits to all transmitting antennas, with the limitation of minimum interference power for each target. In previous research this scheme was designed to intercept a target, but in this study the covariance matrix is designed to maximize the signal-to-noise and interference ratio and the antenna transmit power at the maximum position of all targets and at the interference position as low as possible. The simulation results also show that the proposed method can achieve the maximum signal-to-interference plus noise ratio in all targets. This value can also be increased by increasing the number of antenna elements.
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Laili, Yuanjun, Fei Ye, Yongjing Wang, and Lin Zhang. "Interference probability matrix for disassembly sequence planning under uncertain interference." Journal of Manufacturing Systems 60 (July 2021): 214–25. http://dx.doi.org/10.1016/j.jmsy.2021.05.014.

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Ji, Yunhao, Yaobing Lu, Shan Wei, and Zigeng Li. "Multiple Mainlobe Interferences Suppression Based on Eigen-Subspace and Eigen-Oblique Projection." Sensors 22, no. 21 (2022): 8494. http://dx.doi.org/10.3390/s22218494.

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When the desired signal and multiple mainlobe interferences coexist in the received data, the performance of the current mainlobe interference suppression algorithms is severely challenged. This paper proposes a multiple mainlobe interference suppression method based on eigen-subspace and eigen-oblique projection to solve this problem. First, use the spatial spectrum algorithm to calculate interference power and direction. Next, reconstruct the eigen-subspace to accurately calculate the interference eigenvector, then generate the eigen-oblique projection matrix to suppress mainlobe interference and output the desired signal without distortion. Finally, the adaptive weight vector is calculated to suppress sidelobe interference. Through the above steps, the proposed method solves the problem that the mainlobe interference eigenvector is difficult to select, caused by the desired signal and the mismatch of the mainlobe interference steering vector and its eigenvector. The simulation result proves that our method could suppress interference more successfully than the former methods.
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Lv, Xue Lei, Guo Mei Zhang, Guo Bing Li, Gang Ming Lv, and Chao Zhang. "Partial Interference Alignment Schemes for the K-User MIMO Interference Channel." Applied Mechanics and Materials 548-549 (April 2014): 1368–76. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1368.

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Partial interference alignment (PIA) strategies for the K-user interference channel are considered. Two schemes are proposed to align the partial interference for the downlink interference channel in the case ofK>3. In the first scheme, strong interferences are limited as much as possible by aligning the two strongest interferers into a same subspace at the receiver. While the second scheme is to design its precoding matrix (or vector) by selecting the precoder pair which maximizes the chordal distance between designed signal subspace and interference signal subspace in the set of pecoding matrices (or vectors) at each transmitter. Simulation results show that compared with the existing schemes which don’t optimize the precoder, such as Fixed-PIA, the proposed schemes can improve the sum rates significantly by selecting IA forms in multi-input multi-output (MIMO) systems.
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Kazmierczak, Steven C., Paul G. Catrou, and Donald Boudreau. "Simplified interpretative format for assessing test interference: studies with hemoglobin-based oxygen carrier solutions." Clinical Chemistry 44, no. 11 (1998): 2347–52. http://dx.doi.org/10.1093/clinchem/44.11.2347.

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Abstract Substances such as hemoglobin that interfere with analytical processes are recognized as a frequent source of error in laboratory medicine. Standard guidelines for assessment of test interferences assume that interference effects are not related to the concentration of the analyte being measured. However, previous investigations have demonstrated that interference effects can be markedly different, depending on the concentrations of interferent and analyte within the specimen. An experimental protocol for investigating these different types of interference effects has been developed. This protocol utilizes an orthogonally arranged matrix with progressively increasing concentrations of analyte and interferent. Evaluation of the measured analyte concentrations in specimens within the matrix using multiple regression analysis allows the magnitude, direction, and significance of each type of interference to be determined. Unfortunately, implementation of the interference data derived from the multiple regression analysis for judging the clinical acceptability of test results when an interferent is present is difficult. We describe a two-dimensional graphical format for evaluating the clinical acceptability of test results, based on criteria established under the Clinical Laboratory Improvement Amendments of 1988, in specimens containing hemoglobin-based oxygen carrier solutions.
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Rainey, P. M., K. E. Rogers, and W. L. Roberts. "Metabolite and matrix interference in phenytoin immunoassays." Clinical Chemistry 42, no. 10 (1996): 1645–53. http://dx.doi.org/10.1093/clinchem/42.10.1645.

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Abstract The major phenytoin metabolite, 5-(p-hydroxyphenyl)-5-phenylhydantoin glucuronide (HPPG), was primarily responsible for the positive bias noted when uremic specimens were assayed with the Abbott TDx Free Phenytoin fluorescence polarization immunoassay. The amount of bias depended on both HPPG and phenytoin concentration, increasing with increases in either concentration. The new Abbott TDx II assays for phenytoin and free phenytoin exhibited no significant cross-reactivity with HPPG and no bias in clinical specimens from uremic patients. Both assays correlated well with Emit-based assays (r >0.98), had CVs of <3.5%, and had minimum detection limits of <0.1 mg/L. Calibration curves were stable for at least 6 weeks. All of the TDx assays cross-reacted with another metabolite, 5-(p-hydroxyphenyl)-5-phenylhydantoin (HPPH), but expected HPPH concentrations are too low to cause a clinically significant bias. The Emit-based phenytoin assay exhibited a significant matrix effect when calibrators were prepared in defibrinated plasma processed to resemble serum.
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Dissertations / Theses on the topic "Matrix interference"

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Lee, Michael James. "Crystal field matrix reduction and polarisation interference calculations." Thesis, University of Canterbury. Physics and Astronomy, 1999. http://hdl.handle.net/10092/8169.

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The theory of one-electron crystal field parametrisation for optical spectra of rare-earth doped crystalline lattices dates back over forty years. The effect of the crystal host material is to split the free-ion degeneracy of the rare-earth multiplets. Some of these multiplets have structure which defies explanation in terms of crystal field theory and new developments have emerged within the last five years to address the problem. One of these methods takes the set of crystal field operators and appends two-electron correlation operators. Another adjusts the crystal field operators to include excited state configuration effects. A direct comparison of fitted parameters is meaningless, the corresponding operators being defined on different spaces. Here the techniques of matrix reduction, as developed in effective operator theory, are applied to larger configuration Hamiltonians to model their effects in correlation space. Correlation operators are then fitted to the reduced configuration matrices to establish a connection between the two approaches. Transition intensity parametrisation has a similar lengthy history and formulation. Geometric effects first brought to light fifteen years ago suggest the possibility of polarisation dependent interference between the transition moments of different Cartesian axes. This would manifest itself in the directional dependence of fluorescence intensity for low symmetry crystal hosted rare-earth centres. To date there have been no experimental tests of these predictions and here a case is made for certain transitions of hydrogenated praseodymium doped fluorite. There are certain practical difficulties which must be overcome and these are also addressed.
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Attari, Amir Reza. "Analysis of interference in high frequency circuits using the transmission line matrix method." Université Joseph Fourier (Grenoble), 2002. http://www.theses.fr/2002GRE10056.

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Dans la compatibilité électromagnétique (CEM) l'analyse des interférences est très importante. Plusieurs progrès technologiques tels que les processeurs ultrarapides et le packaging à faible coût ont contribué à l'importance de cette analyse. La recherche réalisée ici établit une méthode hybride efficace pour l'analyse des interférences. Cette méthode hybride est basée sur la méthode TLM (transmission line matrix) et la formulation des équations intégrales dans le domaine temporel. La démarche employée dans l'étude est la suivante: La méthode TLM est utilisée pour analyser chaque circuit séparement puis les équations intégrales dans le domaine temporel sont mises en oeuvre pour déterminer le rayonnement des circuits et les interférences entre ces derniers. La méthode hybride proposée est très efficace pour des structures qui contiennent des circuits séparés par de grandes distances. A l'inverse de l'application classique de la méthode TLM, la mémoire et le temps de calcul de cette nouvelle méthode son indépendants de la distance entre les circuits. Le blindage par boitiers électromagnétiques est fréquemment employé pour réduire l'émission ou pour améliorer l'immunité des circuits électroniques aux interférences hautes fréquences. Dans cette étude, la méthode TLM est également utilisée pour analyser et concevoir des boitiers électromagnétiques. Le blindage considéré est un boitier rectangulaire avec une ouverture de forme arbitraire. La méthode hybride TLM-Equations intégrales est aussi utilisée pour estimer l'interférence entre deux circuits protégés respectivement par des boitiers de blindage. Des mesures expérimentales sont fournies pour valider les résultats des simulations numériques présentées dans cette thèse.
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Rice, Stacie L. "Environmental Analysis of Selected Estrogens and androgens: Applying Ultra-Performance Liquid Chromatography and Combating Matrix Interference." W&M ScholarWorks, 2009. http://www.vims.edu/library/Theses/Rice09.pdf.

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Alam, Ahmad Mahbubul. "Energy efficiency-spectral efficiency tradeoff in interference-limited wireless networks." Thesis, Rennes, INSA, 2017. http://www.theses.fr/2017ISAR0028/document.

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L'une des stratégies utilisée pour augmenter l'efficacité spectrale (ES) des réseaux cellulaires est de réutiliser la bande de fréquences sur des zones relativement petites. Le problème majeur dans ce cas est un plus grand niveau d'interférence, diminuant l'efficacité énergétique (EE). En plus d'une plus grande largeur de bande, la densification des réseaux (cellules de petite taille ou multi-utilisateur à entrées multiples et sortie unique, MU-EMSO), peut augmenter l'efficacité spectrale par unité de surface (ESuS). La consommation totale d'énergie des réseaux sans fil augmente en raison de la grande quantité de puissance de circuit consommée par les structures de réseau denses, réduisant l'EE. Dans cette thèse, la région EE-SE est caractérisé dans un réseau cellulaire hexagonal en considérant plusieurs facteurs de réutilisation de fréquences (FRF), ainsi que l'effet de masquage. La région EE-ESuS est étudiée avec des processus de Poisson ponctuels (PPP) pour modéliser un réseau MU-EMSO avec un précodeur à rapport signal sur fuite plus bruit (RSFB). Différentes densités de station de base (SB) et nombre d'antennes aux SB avec une consommation d'énergie statique sont considérées.Nous caractérisons d'abord la région EE-SE dans le réseau cellulaire hexagonal pour différentes FRF, avec et sans masquage. Avec le masquage en plus de la perte de propagation, la mesure de coupure ε-EE-ES est proposée pour évaluer les performances. Les courbes EE-ES présentent une grande partie linéaire, due à la consommation de puissance statique, suivie d'une forte diminution de l'EE, puisque le réseau est homogène et limité par les interférences. Les résultats montrent qu'un FRF de 1 pour les régions proches de la SB et des FRF plus élevés dans la région plus proche du bord de la cellule améliorent le point optimal du EE-ES. De plus, un meilleur compromis EE-ES peut être obtenu avec une valeur plus élevée de coupure. En outre, un FRF de 1 est le meilleur choix pour une valeur élevée de coupure en raison d'une réduction du rapport signal sur interférence plus bruit (RSIB).Les précodeurs sont utilisés en liaison descendante des réseaux cellulaires MU-EMSO à accès multiple par division spatiale (AMDS) pour améliorer le RSIB. La géométrie stochastique a été utilisée intensivement pour analyser de tels systèmes complexes. Nous obtenons une expression analytique de l'ESuS en régime asymptotique, c.-à-d. nombre d'antennes et d'utilisateurs infinis, en utilisant des résultats de matrices aléatoires et de géométrie stochastique. Les SBs et les utilisateurs sont modélisés par deux PPP indépendants et le précodage RSFB est utilisé. L'EE est dérivée d'un modèle de consommation de puissance linéaire. Les simulations de Monte Carlo montrent que les expressions analytiques sont précises même pour un nombre faible d'antennes et d'utilisateurs. De plus, les courbes d'EE-ESuS ont une grande partie linéaire avant une forte décroissante de l'EE, comme pour les réseaux hexagonaux. Les résultats montrent également que le précodeur RSFB offre de meilleurs performances que le précodeur forçage à zéro (FZ), qui est typiquement utilisé dans la literature. Les résultats numériques pour le précodeur RSFB montrent que déployer plus de SBs ou d'antennes aux BSs augmente l'ESuS, mais que le gain dépend du rapport des densités SB-utilisateurs et du nombre d'antennes lorsque la densité de l'utilisateur est fixe. L'EE augmente seulement lorsque l'augmentation de l'ESuS est plus importante que l'augmentation de la consommation d'énergie par unité de surface. D'autre part, lorsque la densité d'utilisateur augmente, l'ESuS dans la région limitée par les interférences peut être améliorée en déployant davantage de SB sans sacrifier l'EE et le débit ergodique des utilisateurs<br>One of the used strategies to increase the spectral efficiency (SE) of cellular network is to reuse the frequency bandwidth over relatively small areas. The major issue in this case is higher interference, decreasing the energy efficiency (EE). In addition to the higher bandwidth, densification of the networks (e.g. small cells or multi-user multiple input single output, MU-MISO) potentially increases the area spectral efficiency (ASE). The total energy consumption of the wireless networks increases due to the large amount of circuit power consumed by the dense network structures, leading to the decrease of EE. In this thesis, the EE-SE achievable region is characterized in a hexagonal cellular network considering several frequency reuse factors (FRF), as well as shadowing. The EE-ASE region is also studied using Poisson point processes (PPP) to model the MU-MISO network with signal-to-leakage-and-noise ratio (SLNR) precoder. Different base station (BS) densities and different number of BS antennas with static power consumption are considered.The EE-SE region in a hexagonal cellular network for different FRF, both with and without shadowing is first characterized. When shadowing is considered in addition to the path loss, the ε-SE-EE tradeoff is proposed as an outage measure for performance evaluation. The EE-SE curves have a large linear part, due to the static power consumption, followed by a sharp decreasing EE, since the network is homogeneous and interference-limited. The results show that FRF of 1 for regions close to BS and higher FRF for regions closer to the cell edge improve the EE-SE optimal point. Moreover, better EE-SE tradeoff can be achieved with higher outage values. Besides, FRF of 1 is the best choice for very high outage value due to the significant signal-to-interference-plus-noise ratio (SINR) decrease.In downlink, precoders are used in space division multiple access (SDMA) MU-MISO cellular networks to improve the SINR. Stochastic geometry has been intensively used to analyse such a complex system. A closed-form expression for ASE in asymptotic regime, i.e. number of antennas and number of users grow to infinity, has been derived using random matrix theory and stochastic geometry. BSs and users are modeled by two independent PPP and SLNR precoder is used at BS. EE is then derived from a linear power consumption model. Monte Carlo simulations show that the analytical expressions are tight even for moderate number of antennas and users. Moreover, the EE-ASE curves have a large linear part before a sharply decreasing EE, as observed for hexagonal network. The results also show that SLNR outperforms the zero-foring (ZF) precoder, which is typically used in literature. Numerical results for SLNR show that deploying more BS or a large number of BS antennas increase ASE, but the gain depends on the BS-user density ratio and on the number of antennas when user density is fixed. EE increases only when the increase in ASE dominates the increase of the power consumption per unit area. On the other hand, when the user density increases, ASE in interference-limited region can be improved by deploying more BS without sacrificing EE and the ergodic rate of the users
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Müller, Axel. "Random Matrix Analysis of Future Multi Cell MU-MIMO Networks." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0021/document.

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Les futurs systèmes de communication sans fil devront utiliser des architectures cellulaires hétérogènes composées de grandes cellules (macro) plus performantes et de petites cellules (femto, micro, ou pico) très denses, afin de soutenir la demande de débit en augmentation exponentielle au niveau de la couche physique. Ces structures provoquent un niveau d'interférence sans précèdent à l'intérieur, comme à l'extérieur des cellules, qui doit être atténué ou, idéalement, exploité afin d'améliorer l'efficacité spectrale globale du réseau. Des techniques comme le MIMO à grande échelle (dit massive MIMO), la coopération, etc., qui contribuent aussi à la gestion des interférences, vont encore augmenter la taille des grandes architectures hétérogènes, qui échappent ainsi à toute possibilité d'analyse théorique par des techniques statistiques traditionnelles.Par conséquent, dans cette thèse, nous allons appliquer et améliorer des résultats connus de la théorie des matrices aléatoires à grande échelle (RMT) afin d'analyser le problème d'interférence et de proposer de nouveaux systèmes de précodage qui s'appuient sur les résultats acquis par l'analyse du système à grande échelle. Nous allons d'abord proposer et analyser une nouvelle famille de précodeurs qui réduit la complexité de calcul de précodage pour les stations de base équipées d'un grand nombre d'antennes, tout en conservant la plupart des capacités d'atténuation d'interférence de l'approche classique et le caractère quasi-optimal du précodeur regularised zero forcing. Dans un deuxième temps, nous allons proposer une variation de la structure de précodage linéaire optimal (obtenue pour de nombreuses mesures de performance) qui permet de réduire le niveau d'interférence induit aux autres cellules. Ceci permet aux petites cellules d'atténuer efficacement les interférences induites et reçues au moyen d'une coopération minimale. Afin de faciliter l'utilisation de l'approche analytique RMT pour les futures générations de chercheurs, nous fournissons également un tutoriel exhaustif sur l'application pratique de la RMT pour les problèmes de communication en début du manuscrit<br>Future wireless communication systems will need to feature multi cellular heterogeneous architectures consisting of improved macro cells and very dense small cells, in order to support the exponentially rising demand for physical layer throughput. Such structures cause unprecedented levels of inter and intra cell interference, which needs to be mitigated or, ideally, exploited in order to improve overall spectral efficiency of the communication network. Techniques like massive multiple input multiple output (MIMO), cooperation, etc., that also help with interference management, will increase the size of the already large heterogeneous architectures to truly enormous networks, that defy theoretical analysis via traditional statistical methods.Accordingly, in this thesis we will apply and improve the already known framework of large random matrix theory (RMT) to analyse the interference problem and propose solutions centred around new precoding schemes, which rely on large system analysis based insights. First, we will propose and analyse a new family of precoding schemes that reduce the computational precoding complexity of base stations equipped with a large number of antennas, while maintaining most of the interference mitigation capabilities of conventional close-to-optimal regularized zero forcing. Second, we will propose an interference aware linear precoder, based on an intuitive trade-off and recent results on multi cell regularized zero forcing, that allows small cells to effectively mitigate induced interference with minimal cooperation. In order to facilitate utilization of the analytic RMT approach for future generations of interested researchers, we will also provide a comprehensive tutorial on the practical application of RMT in communication problems
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Khan, Zulfiqar A. "EMI/EMC analysis of electronic systems subject to near zone illuminations." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196207323.

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Sayre, Daniel B. Jr. "Measurement of the 2.68-MeV Resonance Interference and R-Matrix Analysis of the 12C(α,γ0)16O Reaction". Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1304620029.

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Hanson, Timothy B. "Cascade adaptive array structures." Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1173207031.

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Valle, Brent. "Design of Multilayer Optical Media: Organic Photovoltaics and Optical Data Storage." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1364917393.

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Offley, Stephen George. "Aspects of flow injection atomic absorption spectrometry." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/25489.

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The literature relevant to the generation of volatile hydrides for analytical atomic spectroscopy has been reviewed, with particular reference to atomic absorption spectrometry (AAS). This reveals some conflicting information concerning the nature of various interference effects and strategies to overcome them. The use of flow injection (FI) procedures has been demonstrated by several research groups, to be beneficial. A review of the literature concerning the application of FI techniques to AAS shows that there is a sustained interest in the use of such a combination for analytical purposes. In particular, an interest in the on-line coupling of chemical pretreatment of samples is evident. Atomic absorption spectrometry has a limited working range and requires frequent calibration, consequently, there is a need for a rapid, precise on-line dilution procedure. The potential of FI systems with wide bore manifold tubing for on-line dilution was assessed and found to be limited by variations in dispersion coefficient arising from differences in specific gravities between the sample and carrier fluids. This could be overcome only by the use of unrealistically high flow rates. The use of FI procedures for the generation of volatile hydrides of selenium and arsenic was investigated. Optimization studies of system parameters, including the atomization step, were undertaken which demonstrated the benefits in applying FI in hydride generation atomic absorption spectrometry (HGAAS). Analytical methods were devised and evaluated for the determination of Se in copper metal and As in nickel alloy. These procedures involved the use of an on-line matrix removal step in which potentially interfering matrix elements were retained on a strong cation exchange resin (Dowex 50W). The manifold was designed so that the FI value acted as the interface between the matrix isolation stage and the vapour generation stage, a strategy which allowed independent optimization of each stage. Location of the ion exchange resin in the sample loop of a six-port rotary valve allowed the resin to be regenerated easily and rapidly, with a throughput capability of the order of 50 h⁻¹ and permit the proposed full automation of the whole analytical procedure. In the determination of As in nickel alloy a novel stopped-flow pre-reduction step was developed to permit AsIII quantification, therefore, achieve optimum sensitivity. The two systems permitted limits of detection for Se and As of 2.1 and 3.9 ng ml⁻¹ respectively. Direct comparisons were made with existing matrix isolation systems to emphasise the benefits of system design.
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Books on the topic "Matrix interference"

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Goodyer, M. J. Derivation of jack movement influence coefficients as a basis for selecting wall contours giving reduced levels of interference in flexible walled test sections. National Aeronautics and Space Administration, Langley Research Center, 1985.

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Awwad. Matrix Interference in Bioanalytical Assays. Wiley & Sons, Incorporated, John, 2017.

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Letki, Paul J. A novel method of matrix interference removal for quantitative mixture analysis by room temperature phosphorimetry: A thesis in chemistry. 1987.

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Mejía Barbosa, Yobani. Fundamentos de óptica. Curso introductorio. Editorial Universidad Nacional de Colombia, 2020. http://dx.doi.org/10.36385/fcbog-11-0.

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Este libro presenta los temas en óptica clásica del curso Fundamentos de óptica que durante 10 años he impartido como profesor del Departamento de Física de la Universidad Nacional de Colombia, sede Bogotá. Inicialmente di el curso como una materia electiva y a partir del segundo semestre de 2009, hasta el segundo semestre de 2017, lo di en forma ininterrumpida como un curso optativo de la carrera de Física. El programa del curso lo propuse teniendo en cuenta mi experiencia como investigador en óptica aplicada desde mi doctorado en Ciencias-Óptica (1998-2001, Centro de Investigaciones en Óptica, México). El programa está conformado por 4 capítulos: óptica geométrica, polarización, interferencia y difracción, distribuidos en 30 unidades (y 6 apéndices), que se dan en 28 clases de 2 horas. El curso se da en forma magistral con prácticas demostrativas. El objetivo de este libro es que sirva de guía para los estudiantes del curso Fundamentos de óptica y también para aquellos estudiantes de otras carreras que deseen tener un primer acercamiento a la óptica. Para completar la formación básica en óptica clásica el estudiante puede consultar textos clásicos de óptica como Fundamentals of Optics de Jenkins and White (editorial McGraw-Hill, 2001), Optics de Hecht (editorial Pearson, 2017) o Principles of Optics de Born and Wolf (editorial Pergamon Press, 1980). Agradezco a la Universidad Nacional de Colombia por permitirme disfrutar de un año sabático (febrero 2018 - febrero 2019), durante el cual pude escribir la mayor parte de este libro. Bogotá, D. C., Colombia, marzo de 2020.
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Book chapters on the topic "Matrix interference"

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Aliev, Telman. "Robust Technology for Improving Correlation Matrix Stipulation and Identification Adequacy." In Robust Technology with Analysis of Interference in Signal Processing. Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0093-3_4.

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Hu, Zhengbing, Yuriy A. Ushenko, Iryna V. Soltys, et al. "Polarization-Interference Mapping of Microscopic Images of Biological Layers and Polycrystalline Blood Films in the Differential Diagnosis of Benign and Malignant Tumors of the Prostate." In Mueller-Matrix Tomography of Biological Tissues and Fluids. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8228-8_4.

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Hou, Bo, Haiyang Wang, Zhikan Chen, Zhiliang Fan, and Zhicheng Yao. "Robust Interference-plus-Noise Covariance Matrix Reconstruction Algorithm for GNSS Receivers Against Large Gain and Phase Errors." In Lecture Notes in Electrical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8411-4_12.

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Loh, Wulf, and Anne Wierling. "Informierte Einwilligung, häusliche Altenpflege und soziale Robotik – Ein Konzept zur Konkretisierung der Zweckangabe bei Social-Compagnion-Robotern." In Datenreiche Medizin und das Problem der Einwilligung. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62987-1_8.

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ZusammenfassungMit dem Einsatz von sozialer Robotik im Bereich der Pflege und Betreuung älterer Menschen ist eine große Vielfalt an Sensorik verbunden, mit der eine enorme Menge sensibler Daten potenziell rund um die Uhr aufgenommen werden kann – und dies gerade im häuslichen Nahbereich der Pflegebedürftigen. Gleichzeitig stellen ältere Menschen aufgrund ihrer mangelnden Technikaffinität eine besonders vulnerable Gruppe dar. Dieser Beitrag beschäftigt sich mit den Schwierigkeiten einer DSGVO-konformen und ethisch akzeptablen Einwilligungskonzeption in diesen Kontexten, da hier medizinische wie auch medizinisch relevante Daten in erheblichem Umfang verarbeitet werden. Wir schlagen eine „Privacy Interference Matrix“ vor, bei der Kriterien für die Ermittlung der Eingriffstiefe in die Privatsphäre entwickelt und mit der Konkretheit der Zweckangabe in Beziehung gesetzt werden: Je tiefer der Eingriff in die Privatsphäre, desto konkreter muss der Zweck angegeben werden. Im Ergebnis formulieren wir einige Designvorschläge für die Einwilligung, bspw. die Dynamisierung und Wiederholung der Einwilligung, Rahmenbedingungen zur Herabsetzung der kognitiven Belastung.
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Asadi, Hamzeh, Tom O’Mahony, Julie Lambert, and Kenneth N. Brown. "Rapid Quantification of NaDCC for Water Purification Tablets in Commercial Production Using ATR-FTIR Spectroscopy Based on Machine Learning Techniques." In Communications in Computer and Information Science. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-26438-2_9.

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AbstractAccurate, fast and simple quantitative analysis of solid dosage forms is required for efficient pharmaceutical manufacturing. A spectroscopic analysis in ATR-FTIR (Attenuated Total Reflection-Fourier Transform Infrared) mode was developed for NaDCC (Sodium dichloroisocyanurate) quantification. This fast and low-cost method can be used to quantify NaDCC solid dosage forms using ATR-FTIR in absorbance mode in conjunction with partial least squares. A simple sampling procedure is included in the proposed experiment by just dissolving the samples in deionized water. An algorithm pipeline is also included for data cleaning, such as outlier removal, scatter correction, scaling, and mapping of the sample’s spectrum to a NaDCC concentration. In addition, a simple model based on Beer’s law was evaluated on a sub-range of $$1220{-}1830\,\text {cm}^{-1}$$. Furthermore, a variable selection algorithm shows minimum excipient interference from the sample matrix in addition to visual analysis. A statistical analysis of the proposed method shows that it demonstrates a promising result with a regression coefficient of 0.996 ($$R^2=0.996$$) and recovery range of 95.5%–107%. As a result of the positive correlation of ATR-FTIR with NaDCC concentration, and in conjunction with the proposed method, this can serve as a clean, fast, affordable and eco-friendly method for pharmaceutical analysis.
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Nie, Weike, Dazheng Feng, Dingyi Fang, and Xiaojiang Chen. "2-D Adaptive Beamforming with Multiple Bi-Direction Optimization Based on Data Matrix and Application in Interferences Localization." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46981-1_22.

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Kurizki, Gershon, and Goren Gordon. "What is Quantum Interference?" In The Quantum Matrix. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198787464.003.0003.

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Henry seeks to to evade his foe, Eve, by controlling the phase of his superposition state. With this control, Henry can choose where to be or not to be, by having his two waves interfere with the same phase, thereby reinforcing each other, or with opposite phases, resulting in his two waves extinguishing each other. The historical debate on quantum interference and its competing interpretations is reviewed. The spin, an internal rotation of a quantum particle, which constitutes a two-state quantum system, is beneficial for understanding quantum interference and underlies a variety of applications, from magnetic resonance imaging (MRI) to quantum information (QI). Quantum interference allows an object to coexist in states of “being” and “non-being” at a given time. Such coexistence and QI logic contradict the basic dichotomy between being and nothingness postulated 2,500 years ago by Parmenides, yet they resonate with the teachings of the Buddhist thinker Nagarjuna.
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Zuo, Duquan, Jie Liu, Minghao Zhang, et al. "Numerical Simulation on Dynamic Installation Modelling of CFRP Interference-Fit Bolted Joints Under Electromagnetic Loading." In Advances in Transdisciplinary Engineering. IOS Press, 2025. https://doi.org/10.3233/atde250071.

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The dynamic assembly process of CFRP interference-fit bolted joints under electromagnetic loading was investigated using numerical simulation methods. The impact of interference-fit value on the hole wall was analyzed from both interlaminar and intralaminar damage. The results indicate that no delamination occurs in CFRP laminates at an interference-fit level of 0.5%, while varying degrees of delamination are observed at interference-fit levels of 0.9%, 1.3%, and 1.7%. Additionally, interference-fit levels not exceeding 1.7% do not cause fiber or matrix damage. Furthermore, matrix damage is consistently more extensive and severe than fiber damage under different interference-fit levels, highlighting that the matrix is more susceptible to damage than fibers.
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Shvets, Valerian, Svitlana Ilnytska, and Oleksandr Kutsenko. "Application of Computer Modelling in Adaptive Compensation of Interferences on Global Navigation Satellite Systems." In Advances in Computer and Electrical Engineering. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7588-7.ch014.

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Modern society is characterized by the increased use of global navigation satellite systems (GNSS), which is inseparably linked with the interference immunity ensurance. The most effective way to protect against interferences is an introduction into the receiver structure of adaptive interference compensators. However, the most of proposed methods have been designed for radiolocation and communication and use a priori information about the transmitted signal. Since as structure of GNSS signal differs from the radar and communication systems, GNSS does not know the time-frequency structure of the useful signal in advance, which excludes the possibility of using a number of widely known methods. In this chapter, the authors propose a method, which does not use a priori information about a useful signal, and a new direct method for calculating the inverse correlation matrix of interference in adaptive antennas of interferences compensators.
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Child, M. S. "Matrix Elements." In Semiclassical Mechanics with Molecular Applications. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780198556541.003.0005.

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Abstract The calculation of matrix elements raises several interesting points. In the first place it immediately raises the question of normalization of the semiclassical wavefunctions, which is addressed in Section 5.1. The conclusion is that the JWKB normalization factors for bound and continuum states differ only by a factor dependent on the density of states. Secondly Section 5.2 shows how an angle–action representation for the wavefunction leads directly to the Heisenberg correspondence between matrix elements and classical Fourier components. Thirdly Franck–Condon and curve-crossing matrix elements often show informative interference patterns which are clearly revealed by the stationary phase and uniform approximations outlined in Section 5.3. Finally the more awkward non-curve-crossing cases examined in Section 5.4 provide a further illustration of the uniform approximation approach.
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Conference papers on the topic "Matrix interference"

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Choi, Garam, Jinyong Kim, Jinseob Kim, et al. "Snapshot Multi Angle Mueller matrix metrology using multiple self-interference." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.af1e.6.

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We proposed the massive acquisition of full Mueller matrix across an entire range of angles, offering fully comprehensive structural. Our method could be a novel solution to recent metrological challenges limitations in advanced semiconductor metrology.
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Wang, Yihe, Dawei Gao, Xisheng Xu, Guisheng Liao, Huiran Zeng, and Yaxing Yue. "Interference Suppression for FMCW Radars with EMD Enhanced Sparse Matrix Recovery." In 2024 IEEE International Conference on Signal, Information and Data Processing (ICSIDP). IEEE, 2024. https://doi.org/10.1109/icsidp62679.2024.10867886.

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Makkonen, Okko. "Flexible Field Sizes in Secure Distributed Matrix Multiplication via Efficient Interference Cancellation." In 2024 IEEE International Symposium on Information Theory (ISIT). IEEE, 2024. http://dx.doi.org/10.1109/isit57864.2024.10619357.

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Zhang, Chengyu, Wenfeng Ma, Cong Wang, Zihao Pan, Peng Zhu, and Jinxu Wang. "Robust Adaptive Beamforming Based on Low Complexity Interference Plus Noise Covariance Matrix Reconstruction." In 2024 10th International Conference on Computer and Communications (ICCC). IEEE, 2024. https://doi.org/10.1109/iccc62609.2024.10941820.

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Shen, Wenzhuang, Qinghe Song, Haiting Xia, Haining Dang, and Rongbi Wu. "Channel Crosstalk Elimination of Color Digital Holography Based on Plane Wave Holographic Interference." In Frontiers in Optics. Optica Publishing Group, 2024. https://doi.org/10.1364/fio.2024.jd4a.90.

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We propose a color CCD crosstalk elimination method based on the interference of plane waves. This method only requires capturing one hologram to determine the crosstalk matrix, and improving the calculation accuracy.
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Zhao, Yan, Yahe Wang, Haoxuan Zhang, et al. "Robust adaptive beamforming based on reconstruction of interference covariance matrix and estimation of steering vector." In Sixteenth International Conference on Signal Processing Systems (ICSPS 2024), edited by Robert Minasian and Li Chai. SPIE, 2025. https://doi.org/10.1117/12.3060968.

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Ghosh, Rajib Ratan, Danqing Liu, and Weiming Yao. "A novel reconfigurable multimode interference coupler for photonic vector-matrix multiplication operation using liquid crystal tuning." In 2024 IEEE Photonics Conference (IPC). IEEE, 2024. https://doi.org/10.1109/ipc60965.2024.10799915.

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Biloshenko, Konstantin, Iuliia Riabenko, and Alexander D. Roshal. "Exploring Quantum Yield and Signal Shifts in Tryptophan Fluorescence on Nanostructured Biosensor Surfaces." In Bio-Optics: Design and Application. Optica Publishing Group, 2025. https://doi.org/10.1364/boda.2025.jm4a.6.

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Gold nanoparticle-implanted substrates enhance tryptophan fluorescence, overcoming low intensity and matrix interference. This study examines drying times, vacuum effects, and residue distribution, providing insights for biosensor development in biomolecular detection.
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Li, Yanghui, Weidong Shen, Zhenyue Luo, Xu Liu, and Peifu Gu. "Analysis of coating-induced polarization aberrations by Jones matrix." In Optical Interference Coatings. OSA, 2010. http://dx.doi.org/10.1364/oic.2010.wc7.

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Smith, Paula K., and Russell A. Chipman. "Characterizing Multilayer, Low Diattenuation Mirrors With a Mueller Matrix Imaging Polarimeter." In Optical Interference Coatings. OSA, 2007. http://dx.doi.org/10.1364/oic.2007.thb4.

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Reports on the topic "Matrix interference"

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Vaccaro, Richard J. Assessment of Matrix Filters for Passive Sonar Interference Suppression. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada389807.

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Baete, Christophe. PR-405-173610-R01 Develop New Criteria for DC Stray Current Interference. Pipeline Research Council International, Inc. (PRCI), 2019. http://dx.doi.org/10.55274/r0011602.

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This report refers to the activities performed in the frame of PRCI project on the refinement of the dynamic DC stray current corrosion criteria by applying an advanced DC corrosion prediction model. In order to find realistic stray current interference conditions, an industry survey was performed to retrieve dynamic DC interference signals on real-world pipelines. After analysis of the cases, a simulation matrix was proposed that covers a wide variety of interference conditions. The simulated signals were simplified as squared pulses. The European Standard EN 50162 Protection against corrosion stray current from direct current systems was used a reference for validation. Some other criteria that are currently under investigation have been considered as well. The criteria were validated against simulated corrosion rates. The final goal is achieving a further refinement of the dynamic DC stray current criteria. The simulations demonstrate that current criteria are either not valid, either too conservative when steel tends to passivate under anodic excursions in high pH soil due to the development of a Fe3O4 film. The lowest pH value at which the passive film developed was 10.34 with relatively short cathodic duration (30 sec) and long (50 sec) and strong (-200 mVcse) anodic potential. There is a related webinar.
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ไตรตียะประเสริฐ, กวีร์. การวิเคราะห์ผลของตัวกลางต่อสัญญาณของปรอท และการตกค้างของปรอทที่ความเข้มข้นสูงระหว่างการตรวจวัดด้วยเครื่อง ICP-OES. สถาบันวิจัยสภาวะแวดล้อม จุฬาลงกรณ์มหาวิทยาลัย, 2016. https://doi.org/10.58837/chula.res.2016.64.

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ปรอท (Mercury (Hg)) เป็นธาตุที่มีอยู่ตามธรรมชาติ สามารถถูกปลดปล่อยออกมาสู่สิ่งแวดล้อมผ่านการกระทำของมนุษย์ ปรอทเป็นธาตุที่มีความเป็นพิษสูงทั้งต่อสิ่งมีชีวิตและสิ่งแวดล้อม ด้วยเหตุนี้ การวิเคราะห์เพื่อหาความเข้มข้นของปรอทในตัวอย่างสิ่งแวดล้อมจึงมีความสำคัญเป็นอย่างยิ่ง โดยทั่วไปแล้วการวิเคราะห์ปริมาณของปรอทในตัวอย่างนั้น จะต้องเริ่มด้วยการดำเนินการย่อยตัวอย่างด้วยกรดความเข้มข้นสูงเพื่อให้ได้ตัวอย่างที่พร้อมสำหรับการวิเคราะห์ด้วยเครื่องมือต่าง ๆ ขั้นตอนการเตรียมตัวอย่างนั้นมีผลทำให้ตัวกลาง หรือ Matrix ของตัวอย่างเปลี่ยนไป และส่งผลต่อเนื่องให้สัญญาณของปรอทจากการตรวจวัดเปลี่ยนไป ผลการทดลองพบว่าสัญญาณของปรอทที่ความเข้มข้น 1000 ug/L ในตัวกลางกรดที่ความเข้มข้น 1% และ 5% HNO₃ เป็นตัวกลางนั้นให้ความเข้มข้นของสัญญาณสูงสุดเมื่อเทียบกับกรด 3% HCI และ DI ซึ่งให้สัญญาณที่ใกล้เคียงกัน และเมื่อความเข้มข้นของ HCI เพิ่มขึ้นจาก 3% เป็น 10% พบว่าสัญญาณของปรอทนั้นลดลง เนื่องจากผลกระทบของการเกิด Polyatomic Interference เมื่อนำผลการทดลองไปสร้างกราฟมาตรฐานปรอทในตัวกลางที่ต่างกัน 3 ชนิด ได้แก่ 3% HCI 1% HNO₃ และสารละลาย Aqua Regia เจือจาง 10 เท่า พบว่าตัวกลางแต่ละชนิดให้ผลของสัญญาณที่แตกต่างกัน ซึ่งสามารถสังเกตได้จากความชันของกราฟ เมื่อพิจารณาผลของสัญญาณของปรอทในกลางชนิดต่าง ๆ พบว่า กราฟของปรอทที่อยู่ในตัวกลางชนิดเดียวกันจะมีความเป็นเส้นตรง (linear) สูง จึงสามารถสรุปได้ว่าการเตรียมตัวอย่างเพื่อวิเคราะห์ปรอทนั้นจะต้องดำเนินการให้ตัวอย่างและกราฟมาตรฐานอยู่ในตัวกลางชนิดเดียวกัน นอกเหนือไปจากนั้นแล้วยังพบว่าการตรวจวัดความเข้มข้นของปรอทด้วยเครื่องมือ ICP-OES นั้นมักพบปัญหา Memory Effect กล่าวคือ การทำการตรวจวัดปรอทที่มีความเข้มข้นสูง อาจส่งผลให้ผลการตรวจวัดตัวอย่างในลำดับถัดไปผิดพลาดไปจากความเป็นจริง จึงได้ทำการทดลองหาสารเคมีที่ใช้ล้างระบบเพื่อลดปัญหา Memory Effect และพบว่าสารละลาย Aqua Regia เจือจาง 10 เท่า นั้นสามารถล้างปรอดทออกจากระบบของเครื่องมือ ICP-OES ได้อย่างสมบูรณ์อีกทั้งยังใช้เวลาน้อยที่สุดในการทำให้เกิดปฏิกิริยา Oxidation ของปรอทให้กลายเป็น Hg(II) จนเกิดปฏิกิริยารวมกับ Cl เกิดเป็น Tetrachloromercurate ([HgCl] ²) แล้วจึงถูกชะล้างออกจากระบบของเครื่องมือ ICP-OES ในที่สุด
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Robertson, R., and D. D. Burgess. Rapid separation of the rare-earth elements from some matrix interferences prior to analysis by neutron activation. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193316.

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Robertson, R. A quick separation of the rare-earth elements from some major matrix interferences prior to analysis by neutron activation. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193286.

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Castro Polanco, Alexander, and Diana Cristina Medina Valencia. Influencia de las arvenses en la calidad del suelo y el entorno en regiones cafeteras DOI: https://doi.org/10.22490/notas.8418. Sello Editorial UNAD, 2025. https://doi.org/10.22490/notas.8418.

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El presente trabajo examina el impacto de las arvenses en los suelos de las zonas cafeteras, resaltando tanto su importancia como su dualidad en cuanto a su influencia sobre la calidad del suelo y la sostenibilidad de los cultivos. Así, se enfatiza la relevancia del Manejo Integrado de Arvenses (MIA) como una estrategia clave para mitigar la competencia que estas plantas ejercen sobre el cultivo del café. Se destaca la necesidad de identificar y clasificar las especies de arvenses según su nivel de interferencia, sugiriendo estrategias adaptadas a las condiciones específicas de cada región para maximizar la productividad del café mientras se conserva la integridad del suelo. El documento también discute el papel de las arvenses en la estructura y fertilidad del suelo, destacando su capacidad para contribuir a la formación de materia orgánica a través de la descomposición de residuos vegetales. Esto, a su vez, mejora la retención de agua y la actividad microbiana del suelo, elementos cruciales para la salud del agroecosistema. Se concluye que un manejo adecuado de las arvenses puede ser una herramienta poderosa para mejorar la sostenibilidad y productividad en las regiones cafeteras, siempre y cuando se utilicen estrategias integradas y adaptadas a las condiciones locales. En este sentido, la siguiente nota de campo tiene como objetivo destacar la necesidad de explorar y analizar en mayor profundidad cómo las arvenses pueden interactuar de manera positiva o negativa con los ecosistemas. De igual manera, se contribuye al fortalecimiento académico y a la formación de los estudiantes de los cursos Introducción a las Ciencias Agrícolas (Código 302407465), Edafología y Fertilidad (Código 201612) y Manejo de arvenses (Código 30164).
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