Academic literature on the topic 'Speech interference level'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Speech interference level.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Speech interference level"
1
Rofiq, Asngadi, and Nita Nur Afida. "INTERFERENSI MORFOLOGI BAHASA JAWA KE DALAM BAHASA INDONESIA PADA TUTURAN DALAM SINETRON BANYAK JALAN MENUJU RHOMA TINGKAT 2 DI INDOSIAR." Jurnal Tarbiyatuna: Jurnal Kajian Pendidikan, Pemikiran dan Pengembangan Pendidikan Islam 1, no. 02 (2021): 82. http://dx.doi.org/10.30739/tarbiyatuna.v1i02.680.
Full textAbstract:
This study examines the morphological interference of Javanese into Indonesian which is found in the speech in the soap opera Many Paths to Rhoma Level 2 in Indosiar. This study aims to (1) determine the form of Javanese Morphological Interference into Indonesian. (2) to determine the factors that cause the Morphological Interference of Javanese into Indonesian which is carried out in the speech in the soap opera, There are Many Paths to Rhoma Level 2 in Indosiar. This research uses a qualitative descriptive research approach. The data were analyzed using the Matching method using the basic technique of Sorting the Determining Elements (PUP). The results of this study are in the form of Morphological Interference and the causes of Morphological Interference. The form of Morphological Interference contained in the speech on the soap opera Many Paths to Rhoma Level 2, namely in the form of Morphemic process interference and also Morphophonemic process interference. The factor that causes the Morphological Interference of Javanese into Indonesian in Speech in the soap opera Many Paths to Rhoma Level 2 is due to the habit of speakers using the first language.
2
Veliyeva, Malahat Akbar. "The Phenomena of Interlanguage Interference at the Morphemic Level." International Journal of English Linguistics 6, no. 2 (2016): 124. http://dx.doi.org/10.5539/ijel.v6n2p124.
Full textAbstract:
<p>The phenomena of language interference at the morphemic level as a type of grammatical interference were not accepted by the linguists who considered morphological interference impossible. However, there are linguists who claim that in language contacts morphological systems of languages affect each other and they consider it quite acceptable.</p><p>Divergences in morphological systems of contacting languages cause morphological interference in bilinguals’ speech. Morphological peculiarities of contacting languages explain the reason of such deviations. Morphemes are two-sided units which are identified by the unity of phonetic or exponential (expository) and semantic features. Due to major differences in morphological structures of English and Azerbaijani languages, Azerbaijani students confuse English morphemes with the morphemes in their native language that is reflected in the phenomena of morphemic interference in their speech. So, in the study of morphemic interference it is significant to consider the types of contacting languages that is the basis of typological research in condition of bilingualism and language contacts.</p>
3
Avdeev, Vladimir, Viktor Trushin, and Mihail Kungurov. "Unified Speech-Like Interference for Active Protection of Speech Information." Informatics and Automation 19, no. 5 (2020): 991–1017. http://dx.doi.org/10.15622/ia.2020.19.5.4.
Full textAbstract:
The paper considers the possibility of creating a speech-like interference for the means of vibro-acoustic protection of speech information based on tables of syllables and words of the Russian language. The choice of research directions and experimental conditions is substantiated: synthesis of sound files by random sampling of speech elements from a database, research of spectra of synthesized noise, algorithm for creating interference of the “speech choir” type, study of autocorrelation functions of synthesized speech-like interference, as well as their probability distribution density. It is shown that the spectral and statistical characteristics of the synthesized speech-like interference type "speech choir" of five voices are close to similar characteristics of real speech signals. At the same time, the speech choir was formed by averaging the instantaneous values of temporary realizations of sound files. It is shown that the spectral power density of the speech-like interference of the “speech choir” type practically is not changed with the number of averaged “voices” starting from five. The probability density distribution of the speech-like interference value with an increase in the number of voices in the “speech choir” approaches the normal law (unlike a real speech signal whose probability density is close to the Laplace distribution). Evaluation of the autocorrelation function gave a correlation interval of several milliseconds. The articulation tests of speech intelligibility using synthesized speech-like interference with different signal-to-noise ratios showed the possibility of reducing the integral noise level by 12-15 dB compared to noise-like interference. The dependencies of verbal intelligibility on the integral signal-to-noise ratio are constructed on the basis of polynomial and piecewise linear approximations. A preliminary assessment of a possible impact of speech-like interference on the psycho-emotional state of a person was performed. The direction of further research on increasing the efficiency of algorithms for generating speech-like interference is discussed.
4
Musabaeva, R. "Interference in German Speech of Kyrgyzstan Germans." Bulletin of Science and Practice 6, no. 9 (2020): 424–28. http://dx.doi.org/10.33619/2414-2948/58/44.
Full textAbstract:
The article examines the interference change in the speech of the Germans living in the Chui region of Kyrgyzstan, which is observed at the morphological and syntactic levels and represents deviations from the language norm, the transfer of the right from one language to another. Interference at the morphological level is noticeable in the tendence towards the general case/form, in the verb-linking use of irregular forms of the verb, in the loss of the linking, in the loss of the subject pronounced by the pronoun, in the absence of the article, in the non-standard circulation of date names, in the expansion of the grammatical meaning of prepositions. At the syntactic level, interference is manifested in in a violation of the word order in a sentence.
5
Van Gerven, Pascal W. M., Willemien A. Meijer, Annemiek Vermeeren, Eric F. Vuurman, and Jelle Jolles. "The Irrelevant Speech Effect and the Level of Interference in Aging." Experimental Aging Research 33, no. 3 (2007): 323–39. http://dx.doi.org/10.1080/03610730701319145.
Full text
6
Drużyłowska, Dorota. "Osobennosti obucheniya blizkorodstvennym yazykam. Na primere prepodavaniya russkogo yazyka v pol'skoyazychnoy auditorii i pol'skogo yazyka russkogovoryashchim uchashchimsya." Językoznawstwo 16, no. 1 (2022): 135–47. http://dx.doi.org/10.25312/2391-5137.16/2022_09dd.
Full textAbstract:
This article is devoted to the specifics of teaching Slavic languages to other Slavs and focuses on the example of the Russian and Polish languages taught, respectively, to the Polish-speaking and Russian-speaking students. The article provides definitions of key terms such as: language interference, closely related languages, speech skill, speech error. The purpose of the article is to present, explain, characterize and classify some mechanisms of the errors in the speech of the students caused by language interference. An experiment was conducted among 60 respondents, 30 Poles, studying Russian and 30 Russian-native speakers studying Polish. The experimental research proved, that many structures of the native language impede the effective acquisition of the other Slavonic language. The manifestations of language interference at the morphological-syntactic level were studied. The proposed methodology, a kind of "mirror" interpretation of the problem, can be applied when comparing other pairs of Slavic languages in the context of language didactics. Keywords: language interference, closely related languages, teaching, Russian as Foreign Language, Polish language, speech skill, speech error, experimental research
7
ZHANG, QINGFANG, CHEN FENG, XUEBING ZHU, and CHENG WANG. "Transforming semantic interference into facilitation in a picture–word interference task." Applied Psycholinguistics 37, no. 5 (2015): 1025–49. http://dx.doi.org/10.1017/s014271641500034x.
Full textAbstract:
ABSTRACTA number of studies that observed semantic facilitation in a picture–word interference task questioned the hypothesis that lexical selection during speech production is a competitive process. Semantic facilitation effects are typically observed when context words and target names do not belong to the same semantic category level. In the experiments reported in this article, we used a picture–word interference task with basic-level context words and basic-level naming (i.e., the context word is dog, and the target name is cat) to investigate semantic context effects. We observed a reversal of semantic context effect: context words that induce semantic interference when stimulus onset asynchrony (SOA) are –100 and 0 ms and induce semantic facilitation at large negative SOA values (from –1000 to –400 ms, in steps of 200 ms). At the empirical level, our data suggest that manipulating SOA can reverse the polarity of the semantic context effect. Our analysis demonstrates that the conceptual selection model provides the most straightforward way to account for the reported polarity shift and the different SOA ranges covered by the semantic interference effect and the semantic facilitation effect.
8
Schlegel, Robert E., Shalini Srinivasan, Hank Grant, Randa L. Shehab, and Shivakumar Raman. "Clinical Assessment of Electromagnetic Compatibility of Hearing Aids and Digital Wireless Phones." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, no. 14 (1998): 1023–27. http://dx.doi.org/10.1177/154193129804201404.
Full textAbstract:
Research studies have shown that digital wireless phones interact with some hearing aids, creating a buzzing noise that may reduce speech intelligibility. Interference signals for three phone technologies were generated at five sound pressure levels (35 dB, 45 dB, 55 dB, 65 dB, and 75 dB) and mixed with speech at 65 dB SPL to test the speech intelligibility of 24 hearing-impaired people. A “No Noise” condition was also tested. Scores for the TDMA-217 Hz phone signal at low speech-to-noise ratios (<10 dB) were significantly lower than those for CDMA and TDMA-50 Hz at the same level. The CDMA and TDMA-50 Hz phone signals had a similar effect on speech intelligibility. Speech intelligibility scores at speech-to-noise ratios of 20 dB and 30 dB were similar to those for the “No Noise” condition. The articulation index represented the best index for predicting the impact of wireless phone interference on speech intelligibility.
9
Killion, Mead C., Harry Teder, and Russ Thoma. "Suitcase Lab Measurement of Digital Cellphone Interference Levels on Hearing Aids." Journal of the American Academy of Audiology 12, no. 06 (2001): 281–85. http://dx.doi.org/10.1055/s-0042-1745608.
Full textAbstract:
AbstractA low-cost, “real-life” method for measuring the interference caused by digital wireless (cellphones) telephones in hearing aids is proposed. Data would be valid for specific telephone and hearing aid models. The estimated equipment cost is $500. Abbreviations: AGC = automatic gain control, ANSI = American National Standards Institute, BTE = behind the ear, CD = compact disc, CIC = completely in the canal, DLH = damped long horn, IRIL = input referred interference level, PCS = Personal Communication System, RF = radio frequency, TEM = transverse electromagnetic
10
Volín, Jan, Kristýna Poesová, and Lenka Weingartová. "Speech Melody Properties in English, Czech and Czech English: Reference and Interference." Research in Language 13, no. 1 (2015): 107–23. http://dx.doi.org/10.1515/rela-2015-0018.
Full textAbstract:
Two major objectives were set for the present study: to provide reference data for the description of Czech and English F0 contours, and to investigate the limits of the ‘interference hypothesis’ on Czech English data. Altogether, the production of 40 speakers in 2392 breath-group F0 contours was analyzed. The speech of 32 professional speakers of English and Czech provides reference values for various acoustic correlates of pitch level, pitch span and downtrend gradient. These values were subsequently used as a benchmark for a confirmation of the interference hypothesis through comparison with a further sample of 8 non-professional speakers of English and Czech-accented English. The native English speakers of both genders produced significantly higher pitch level indicators, wider pitch span and a steeper downtrend gradient than the reference native speakers of Czech. Although the pitch level of the Czech-accented material lies in between the two reference groups, the pitch span of this group is the narrowest, which indicates that factors of foreign-accentedness other than simply interference are in effect.
Dissertations / Theses on the topic "Speech interference level"
1
Naish, Daniel A. "Speech interference on residential balconies with road traffic noise." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/63527/1/Daniel_Naish_Thesis.pdf.
Full textAbstract:
Residential balcony design influences speech interference levels caused by road traffic noise and a simplified design methodology is needed for optimising balcony acoustic treatments. This research comprehensively assesses speech interference levels and benefits of nine different balcony designs situated in urban street canyons through the use of a combined direct, specular reflection and diffuse reflection path theoretical model. This thesis outlines the theory, analysis and results that lead up to the presentation of a practical design guide which can be used to predict the acoustic effects of balcony geometry and acoustic treatments in streets with variable geometry and acoustic characteristics.
2
Gautreau, Aurore. "Compréhension de la parole dans la parole : une approche inter-langues pour évaluer les interférences linguistiques durant la compréhension." Thesis, Lyon 2, 2013. http://www.theses.fr/2013LYO20124/document.
Full textAbstract:
Cette thèse s’est intéressée aux interférences linguistiques intervenant dans la situation de la parole dans la parole, en comparant l’effet de masque de masqueurs paroliers générés dans une langue intelligible pour les participants (français) à celui de masqueurs paroliers générés dans des langues non connues (gaélique irlandais et italien), sur l’identification de mots cibles français. Une tâche de décision lexicale à -5 dB nous a permis d’observer des résultats significativement différents entre les masqueurs paroliers générés dans les langues inconnues (irlandais et italien), avec les masqueurs paroliers italiens qui ont réduit l’intelligibilité des mots cibles français avec la même efficacité que les masqueurs paroliers français, alors que les masqueurs paroliers irlandais ont conduit aux performances les plus élevées. L’utilisation de masqueurs de bruit fluctuant générés à partir de chacun des masqueurs paroliers, a montré que seuls les masqueurs paroliers générés dans une langue intelligible ont produit des interférences linguistiques de haut niveau en plus d’interférences acoustiques et linguistiques de bas niveau. Ainsi, la différence de performances observée entre les masqueurs paroliers irlandais et italiens serait expliquée au niveau acoustique et non à un niveau linguistique. De plus, bien que les masqueurs paroliers italiens et français aient eu des effets de masque équivalents, leurs interférences étaient de natures différentes. Lorsque l’italien devient intelligible pour les participants, les masqueurs paroliers italiens, comme ceux générés en français, produisent des interférences linguistiques de haut niveau, et ce, que les mots cibles soient produits dans la langue native des participants ou dans leur langue seconde<br>This research aimed to explore the linguistic interference that occurs during the speech-in-speech situation, by comparing the masking effects of speech backgrounds that were produced in an intelligible language for the participants (i.e., French), to the masking effects of speech backgrounds that were produced in unknown foreign languages (i.e., Irish and Italian), on the identification of French target words. At -5 dB SNR, a lexical decision task revealed significantly divergent results with the unknown languages (i.e., Irish and Italian), with Italian and French speech backgrounds hindering French target word identification to a similar extent, whereas Irish speech backgrounds led to significantly better performances. Using fluctuating noise backgrounds derived from each speech background signals, showed that only the speech backgrounds generated in an intelligible language (i.e., French) produced linguistic interference of high level in addition to acoustic interference and linguistic interference of low level. Thus, the difference observed between the speech backgrounds in Irish and Italian can be explained at an acoustic level but not at a linguistic level. Moreover, although the speech backgrounds in French and in Italian had equivalent masking effects on French word identification, the nature of their interference was different. When Italian became intelligible to the participants, the speech backgrounds in Italian produced linguistic interference of high level like those generated in French, with the target words produced in the native language to the participants or in their second language
3
Adabi, Firouzjaee Jafar. "Remediation strategies of shaft and common mode voltages in adjustable speed drive systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/39293/1/Jafar_Adabi_Firouzjaeel_Thesis.pdf.
Full textAbstract:
AC motors are largely used in a wide range of modern systems, from household appliances to automated industry applications such as: ventilations systems, fans, pumps, conveyors and machine tool drives. Inverters are widely used in industrial and commercial applications due to the growing need for speed control in ASD systems. Fast switching transients and the common mode voltage, in interaction with parasitic capacitive couplings, may cause many unwanted problems in the ASD applications. These include shaft voltage and leakage currents.
One of the inherent characteristics of Pulse Width Modulation (PWM) techniques is the generation of the common mode voltage, which is defined as the voltage between the electrical neutral of the inverter output and the ground. Shaft voltage can cause bearing currents when it exceeds the amount of breakdown voltage level of the thin lubricant film between the inner and outer rings of the bearing. This phenomenon is the main reason for early bearing failures.
A rapid development in power switches technology has lead to a drastic decrement of switching rise and fall times. Because there is considerable capacitance between the stator windings and the frame, there can be a significant capacitive current (ground current escaping to earth through stray capacitors inside a motor) if the common mode voltage has high frequency components. This current leads to noises and Electromagnetic Interferences (EMI) issues in motor drive systems.
These problems have been dealt with using a variety of methods which have been reported in the literature. However, cost and maintenance issues have prevented these methods from being widely accepted. Extra cost or rating of the inverter switches is usually the price to pay for such approaches. Thus, the determination of cost-effective techniques for shaft and common mode voltage reduction in ASD systems, with the focus on the first step of the design process, is the targeted scope of this thesis. An introduction to this research – including a description of the research problem, the literature review and an account of the research progress linking the research papers – is presented in Chapter 1.
Electrical power generation from renewable energy sources, such as wind energy systems, has become a crucial issue because of environmental problems and a predicted future shortage of traditional energy sources. Thus, Chapter 2 focuses on the shaft voltage analysis of stator-fed induction generators (IG) and Doubly Fed Induction Generators DFIGs in wind turbine applications. This shaft voltage analysis includes: topologies, high frequency modelling, calculation and mitigation techniques. A back-to-back AC-DC-AC converter is investigated in terms of shaft voltage generation in a DFIG. Different topologies of LC filter placement are analysed in an effort to eliminate the shaft voltage.
Different capacitive couplings exist in the motor/generator structure and any change in design parameters affects the capacitive couplings. Thus, an appropriate design for AC motors should lead to the smallest possible shaft voltage. Calculation of the shaft voltage based on different capacitive couplings, and an investigation of the effects of different design parameters are discussed in Chapter 3. This is achieved through 2-D and 3-D finite element simulation and experimental analysis.
End-winding parameters of the motor are also effective factors in the calculation of the shaft voltage and have not been taken into account in previous reported studies. Calculation of the end-winding capacitances is rather complex because of the diversity of end winding shapes and the complexity of their geometry. A comprehensive analysis of these capacitances has been carried out with 3-D finite element simulations and experimental studies to determine their effective design parameters. These are documented in Chapter 4. Results of this analysis show that, by choosing appropriate design parameters, it is possible to decrease the shaft voltage and resultant bearing current in the primary stage of generator/motor design without using any additional active and passive filter-based techniques.
The common mode voltage is defined by a switching pattern and, by using the appropriate pattern; the common mode voltage level can be controlled. Therefore, any PWM pattern which eliminates or minimizes the common mode voltage will be an effective shaft voltage reduction technique. Thus, common mode voltage reduction of a three-phase AC motor supplied with a single-phase diode rectifier is the focus of Chapter 5. The proposed strategy is mainly based on proper utilization of the zero vectors.
Multilevel inverters are also used in ASD systems which have more voltage levels and switching states, and can provide more possibilities to reduce common mode voltage. A description of common mode voltage of multilevel inverters is investigated in Chapter 6.
Chapter 7 investigates the elimination techniques of the shaft voltage in a DFIG based on the methods presented in the literature by the use of simulation results. However, it could be shown that every solution to reduce the shaft voltage in DFIG systems has its own characteristics, and these have to be taken into account in determining the most effective strategy.
Calculation of the capacitive coupling and electric fields between the outer and inner races and the balls at different motor speeds in symmetrical and asymmetrical shaft and balls positions is discussed in Chapter 8. The analysis is carried out using finite element simulations to determine the conditions which will increase the probability of high rates of bearing failure due to current discharges through the balls and races.
Books on the topic "Speech interference level"
1
Bullock, Barbara E., Lars Hinrichs, and Almeida Jacqueline Toribio. World Englishes, Code-Switching, and Convergence. Edited by Markku Filppula, Juhani Klemola, and Devyani Sharma. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199777716.013.009.
Full textAbstract:
In this chapter, it is argued that the study of World Englishes (WE) should assume a more central place in the analysis of variation and change in the context of language contact. Because they emerge from situations of bilingualism and contact, WE varieties are highly informative with regard to the structural issues of code-switching and convergence (also termed structural borrowing, transfer, interference, imposition). The inherently mixed nature of WE is shown here to mirror the diverse structural patterns that are commonly encountered in bilingual speech. It is argued that different mixing patterns arise in response to the social and medial embedding of WE vernaculars at the community, the individual, and the interactional levels. Social evaluations of relative prestige, individual projections of style, stance, and identity, and the complex nature of multilingual interaction conspire to bring about complex, new language structures.
Book chapters on the topic "Speech interference level"
1
Miles, Christopher, Clare Madden, and Dylan M. Jones. "Levels of Interference by Irrelevant Speech: One, Some or Many?" In Advances in Psychology. Elsevier, 1988. http://dx.doi.org/10.1016/s0166-4115(08)60633-0.
Full textConference papers on the topic "Speech interference level"
1
Li, Ang, Christos Masouros, Yonghui Li, and Branka Vucetic. "Interference Exploitation Precoding for Multi-level Modulations." In ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2019. http://dx.doi.org/10.1109/icassp.2019.8683216.
Full text
2
Lee, Dong-hwan, and Wonyong Sung. "Least squares based cell-to-cell interference cancelation technique for multi-level cell nand flash memory." In ICASSP 2012 - 2012 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2012. http://dx.doi.org/10.1109/icassp.2012.6288200.
Full text
3
Лифанов, К. В. "Дивергенция словацкого и чешского литературных языков в XX в. на грамматическом уровне (на примере числительных)". У Межкультурное и межъязыковое взаимодействие в пространстве Славии (к 110-летию со дня рождения С. Б. Бернштейна). Институт славяноведения РАН, 2021. http://dx.doi.org/10.31168/0459-6.06.
Full textAbstract:
According to traditional contact linguistics, the result of close linguistic contact is interference, which initially occurs at the level of speech, but can also be re flected at the level of language. At the same time, as the Slovak and Czech literary languages show, the consequence of close linguistic contact can also be pronounced divergent processes. This article focuses on morphological and word-formation changes that have significantly changed the grammatical properties of numerals in Slovak literary language, while in Czech they remained unchanged.
4
Yi, Zhou, Zi Qin Phua, Vitor N. B. Rangel, and Johné M. Parker. "Experimental Investigation on Tags Placement Affecting the Efficient Encoding of Multiple Passive UHF RFID Tags With Unique Identifiers." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67472.
Full textAbstract:
Recently, the Internet of things (IoT) has emerged as a promising solution for several industrial applications. One of the key components in IoT is passive radio frequency identification (RFID) tags which do not require a power source for operations. Specifically, ultra-high frequency (UHF) tags are studied in this paper. However, due to factors such as tag-to-tag interference and inaccurate localization, RFID tags that are closely spaced together are difficult to detect and program accurately with unique identifiers. This paper investigates several factors that affect the ability to encode a specific tag with unique information in the presence of other tags, such as reader power level, tag-to-antenna distance, tag-to-tag distance and tag orientation. ANOVA results report reader power level and tag spacing, along with effect interactions power level*tag space and tag space*tag orientation to be significant at the levels investigated. Results further suggest a preliminary minimum tag-to-tag spacing which enables the maximum number of tagged items to be uniquely encoded without interference. This finding can significantly speed up the process of field programming in item-level tagging.
5
Walton, James F., and Michael R. Martin. "Internal Rotor Friction Induced Instability in High-Speed Rotating Machinery." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0205.
Full textAbstract:
Abstract Results of a program to investigate internal rotor friction destabilizing effects are presented. Internal-friction-producing joints were shown to excite the rotor system first natural frequency, when operating either below or above the first critical speed. The analytical models used to predict the subsynchronous instability were also confirmed. The axial spline joint demonstrated the most severe subsynchronous instability. The interference fit joint also caused subsynchronous vibrations at the first natural frequency but these were bounded and generally smaller than the synchronous vibrations. Comparison of data from the two test joints showed that supersynchronous vibration amplitudes at the first natural frequency were generally larger for the interference fit joint than for the axial spline joint. The effects of changes in imbalance levels and side loads were not distinguishable during testing because amplitude-limiting bumpers were required to restrict orbits.
6
Wang, Xiu-jin. "Research on the Vibration Characteristic of Composite Rotor for Halfspeed Nuclear Power Turbine-Generator." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3152.
Full textAbstract:
Shafting is one of the key units of large steam turbine generator set, its dynamic characteristics directly affect the technical level and operation effect of the new type large capacity Turbine-generator unit. The forces acting on the disc and the shaft are complex in operation. A composite rotor has various dynamic characters for a large capacity nuclear power Turbine-generator comparing with general rotor for its different structure. Numerical simulation was carried out to a composite rotor for a large capacity nuclear power T-G set, so as to analyze the influence of different length to diameter ratio on the vibration characteristics of the low pressure rotor and to study the effect of Interference Amount Between disc and shaft by using the three-dimensional finite element analysis in order to meet the requirements of the good vibration characteristics of the rotor. Firstly, the geometric model of the rotor is set up, and then the element model of the shafting is built, finally natural frequency of the rotor is calculated by using the mechanical module. Vibration characters such as the natural frequency and corresponding mode were obtained by analysis of vibration for the disc and shaft. The effect of the interference fit on critical speeds of the rotors are analyzed preliminarily. The results show that critical speeds of T-G rotor vary sensitively with magnitude of interference. (CSPE).
7
Azizan, Azizul, Atta Quddus, and Barry Evans. "Multipath Interference Canceller and Chip-Level Equalizer for Satellite High Speed Downlink Packet Access (S-HSDPA)." In 26th International Communications Satellite Systems Conference (ICSSC). American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-5463.
Full text
8
Chang, Yin-Jung, Gee-Kung Chang, Thomas K. Gaylord, Daniel Guidotti, and Jianjun Yu. "Ultra-high-speed transmission of polymer-based multimode interference devices for board-level high-throughput optical interconnects." In Integrated Optoelectronic Devices 2006, edited by Allen M. Earman and Ray T. Chen. SPIE, 2006. http://dx.doi.org/10.1117/12.660138.
Full text
9
Xiao, Longhao, Peiwei Sun, and Xinyu Wei. "Design of Liquid Level Control System of Steam Generator Based on Neural Network PID Controller." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-91880.
Full textAbstract:
Abstract Steam generator (SG) is an important equipment of the nuclear power plant, and the stability of its liquid level affects the safe operation of the nuclear power plant. SG is a complex system with nonlinear, time-varying, nonminimum-phase, small stability margin and large time delay. In actual operation, it is difficult for classical PID control to ensure a satisfactory control performance. In this paper, the neural network methods are used to optimize the parameters of the PID controller, and a neural network controller is designed. The controller of the system consists of two components: a classical PID controller, which realizes control through a closed loop; a single-hidden-layer neural network based on the BP (back propagation) model. The neural network calculates the coefficients of the classic PID controller through matrix operations. Two weighting matrices are adjusted according to the gradient descent method to reduce the loss function and realize the training process. The control system is deployed to a SG simulation model through Simulink. The typical working conditions are simulated and investigated. The control performance is compared with that of the classical PID controller. Through analysis, it is confirmed that the neural network PID control system can meet the control requirements with fast response speed, short settling time, stable control effect under various working conditions, and strong anti-interference ability. The results prove that the neural network control has greater advantages and better application value than the classical PID controller.
10
Doria, Alberto, and Edoardo Marconi. "A Testing Method for the Prediction of Comfort of City Bicycles." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85128.
Full textAbstract:
An experimental/numerical method for predicting bicycle comfort from laboratory tests is presented. The frequency response functions of the seat post and of the handlebar stem are measured by means of impulsive excitation applied on vibrating tables placed under the front and rear wheel. The interference between front and rear excitation, which occurs on the road, is taken into account by numerically calculating the correlated frequency response function. Numerical calculations based on the concept of vehicle mission make it possible to manage the dependence of acceleration on forward speed and to calculate acceleration indexes. Results obtained with 2 bicycles and 3 levels of inflation pressure show the validity of the method.
Reports on the topic "Speech interference level"
1
Job, Jacob. Mesa Verde National Park: Acoustic monitoring report. National Park Service, 2021. http://dx.doi.org/10.36967/nrr-2286703.
Full textAbstract:
In 2015, the Natural Sounds and Night Skies Division (NSNSD) received a request to collect baseline acoustical data at Mesa Verde National Park (MEVE). Between July and August 2015, as well as February and March 2016, three acoustical monitoring systems were deployed throughout the park, however one site (MEVE002) stopped recording after a couple days during the summer due to wildlife interference. The goal of the study was to establish a baseline soundscape inventory of backcountry and frontcountry sites within the park. This inventory will be used to establish indicators and thresholds of soundscape quality that will support the park and NSNSD in developing a comprehensive approach to protecting the acoustic environment through soundscape management planning. Additionally, results of this study will help the park identify major sources of noise within the park, as well as provide a baseline understanding of the acoustical environment as a whole for use in potential future comparative studies. In this deployment, sound pressure level (SPL) was measured continuously every second by a calibrated sound level meter. Other equipment included an anemometer to collect wind speed and a digital audio recorder collecting continuous recordings to document sound sources. In this document, “sound pressure level” refers to broadband (12.5 Hz–20 kHz), A-weighted, 1-second time averaged sound level (LAeq, 1s), and hereafter referred to as “sound level.” Sound levels are measured on a logarithmic scale relative to the reference sound pressure for atmospheric sources, 20 μPa. The logarithmic scale is a useful way to express the wide range of sound pressures perceived by the human ear. Sound levels are reported in decibels (dB). A-weighting is applied to sound levels in order to account for the response of the human ear (Harris, 1998). To approximate human hearing sensitivity, A-weighting discounts sounds below 1 kHz and above 6 kHz. Trained technicians calculated time audible metrics after monitoring was complete. See Methods section for protocol details, equipment specifications, and metric calculations. Median existing (LA50) and natural ambient (LAnat) metrics are also reported for daytime (7:00–19:00) and nighttime (19:00–7:00). Prominent noise sources at the two backcountry sites (MEVE001 and MEVE002) included vehicles and aircraft, while building and vehicle predominated at the frontcountry site (MEVE003). Table 1 displays time audible values for each of these noise sources during the monitoring period, as well as ambient sound levels. In determining the current conditions of an acoustical environment, it is informative to examine how often sound levels exceed certain values. Table 2 reports the percent of time that measured levels at the three monitoring locations were above four key values.