Relevant bibliographies by topics / 378.096:621.3

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Academic literature on the topic '378.096:621.3'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "378.096:621.3"

1

He, Ai Dong, Bang Yan Ye, and Zi Yuan Wang. "Experimental Effect of Cryogenic MQL Cutting 304 Stainless Steel." Key Engineering Materials 621 (August 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.621.3.

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Cryogenic MQL is a kind of green machining technology of the combination of cryogenic air and minimal quantity lubrication (MQL). The aim of this research is to determine if the cryogenic MQL technique in turning with Cutting tool with internal cooling structure gives some advantages in terms of tool life, surface roughness and cutting chip breaking. This paper reports the results obtained from turning tests, at one feed rates (0.12mm/r) and one depth of cut (0.4mm) and different cutting speeds (43m/min, 108m/min, 217m/min), and the results obtained show that using cryogenic MQL had some advan
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Wu, Jin Wu, and Hai Peng Yuan. "Effect of Orientation Angle on Acoustic Radiation Mode Amplitudes of Laminated Composite Plates." Applied Mechanics and Materials 621 (August 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amm.621.3.

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In this paper, the acoustic radiation mode’s amplitudes of laminated composite plates are studied. The layer wise finite element model is imposed to determine velocity distributions of laminated composite plates. Based on the acoustic radiation mode, the effects of the panel orientation angle on the first three orders acoustic radiation mode’s amplitude of the laminated composite plates are then discussed. A twelve-layer laminated plate was used as an example, and the numerical simulations results show that the effects of the panel orientation angle on the acoustic radiation amplitude of the l
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Xiong, Yu, Ji Zheng, Song Lin Li, Xue Jia Liu, and Lu Liang. "Investigation on Nano-Sized ZnO Powder Doped with Al3+ Prepared by Sol-Gel Method." Advanced Materials Research 621 (December 2012): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.621.3.

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Al3+-doped ZnO nano-powder was prepared by sol-gel process, using tin tetrachloride and titanium tetrachloride as starting materials. The crystallinity and purity of the powder were analyzed by X-ray diffraction spectrometer (XRD). And the size and distribution of Al3+-doped ZnO grains were studied using transmission electron microscope (TEM) and scanning electron microscope (SEM). The results showed that the Al3+ was successfully doped into the crystal lattice of tin oxide and that the electric conductivity of Al3+-doped ZnO sample was improved significantly.
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Bene, Kouadio, Alain Azokou, Kouassi Bernadin Kouame, Monh Alice Fah, Inna Tata Traore, and Mamidou Witabouna Koné. "Ethnopharmacological Characteristics of Pycnanthus angolensis (Welw.) Warb. (Myristicaceae), a Plant Used in the Traditional Treatment of Viral and Parasitic Diseases." European Journal of Medicinal Plants 34, no. 5 (2023): 12–19. http://dx.doi.org/10.9734/ejmp/2023/v34i51136.

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Background: Pycnanthus angolensis (Welw.) Warb. (Myristicaceae) is a medicinal plant used in traditional Ivorian medicine. A recent ethnobotanical survey has discovered Pycnanthus angolensis in the traditional treatment of viral and parasitic diseases.
 Aim: The present study aims to highlight the distinctive ethnopharmacological characteristics of Pycnanthus angolensis.
 Methods: The aim was to identify some groups of chemical compounds by thin layer chromatography, to assay some minerals and finally to characterise the specific anatomical and micrographic features of the plant.&#x0
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Fernandes, Shanlley Cristina da Silva, Rafaella Souza dos Santos, Erica Albanez Giovanetti, et al. "Impact of respiratory therapy in vital capacity and functionality of patients undergoing abdominal surgery." Einstein (São Paulo) 14, no. 2 (2016): 202–7. http://dx.doi.org/10.1590/s1679-45082016ao3398.

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ABSTRACT Objective To evaluate the vital capacity after two chest therapy techniques in patients undergoing abdominal surgical. Methods A prospective randomized study carried out with patients admitted to the Intensive Care Unit after abdominal surgery. We checked vital capacity, muscular strength using the Medical Research Council scale, and functionality with the Functional Independence Measure the first time the patient was breathing spontaneously (D1), and also upon discharge from the Intensive Care Unit (Ddis). Between D1 and Ddis, respiratory therapy was carried out according to the rand
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Pangestu, Muhamad Syahid Panji, Siti Darodjah, Nena Hilmia, and Muhamad Imron. "Reproductive Performance of Ongole Grade, Simmental, and Limousin Cattle Given Superovulation Treatment." Jurnal Agripet 24, no. 2 (2024): 168–73. http://dx.doi.org/10.17969/agripet.v24i2.32335.

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Reproductive technologies have the potential to enhance livestock productivity, with superovulation being one such method aimed at increasing the number of ovulated oocytes per estrous cycle through hormonal stimulation. This study aimed to evaluate the reproductive performance of three cattle breeds—Ongole Grade (OG) (n=20), Simmental (n=18), and Limousin (n=20)—subjected to superovulation treatment. The cattle, aged 2.5 to 4 years with a body condition score of 3.5 to 4, were intensively managed. Superovulation was induced using CIDR (Controlled Internal Drug Release) for synchronization, fo
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Barros, Hellen Siglia Demetrio, Eniel David Cruz, Adriano Gonçalves Pereira, and Edvaldo Aparecido Amaral da Silva. "FRUIT AND SEED MORFOMETRY, SEED GERMINATION AND SEEDLING VIGOR of Parkia gigantocarpa." FLORESTA 50, no. 1 (2019): 877. http://dx.doi.org/10.5380/rf.v50i1.56855.

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The objectives of this work were to characterize fruits and seeds and evaluate seed germination and seedling vigor from fifteen parent plants of Parkia gigantocarpa Ducke. The fresh weight, length, width, and thickness of fruits and seeds were determined. The germination was tested in a sand substrate, with four replications of 25 seeds per treatment (parent plants). The number of days for emergence, emergence percentage, emergence speed index, germination percentage, and seedling dry weight were evaluated. The fruits presented means for fresh weight, length, width, and thickness of 115.0 g; 6
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Shi, Tianqi, Zeyu Han, Ge Han, et al. "Retrieving CH4-emission rates from coal mine ventilation shafts using UAV-based AirCore observations and the genetic algorithm–interior point penalty function (GA-IPPF) model." Atmospheric Chemistry and Physics 22, no. 20 (2022): 13881–96. http://dx.doi.org/10.5194/acp-22-13881-2022.

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Abstract. There are plenty of monitoring methods to quantify gas emission rates based on gas concentration measurements around the strong sources. However, there is a lack of quantitative models to evaluate methane emission rates from coal mines with less prior information. In this study, we develop a genetic algorithm–interior point penalty function (GA-IPPF) model to calculate the emission rates of large point sources of CH4 based on concentration samples. This model can provide optimized dispersion parameters and self-calibration, thus lowering the requirements for auxiliary data accuracy.
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Malashkevych, Dmytro, Mykhailo Petlovanyi, Kateryna Sai, and Serhii Zubko. "Research into the coal quality with a new selective mining technology of the waste rock accumulation in the mined-out area." Mining of Mineral Deposits 16, no. 4 (2022): 103–14. http://dx.doi.org/10.33271/mining16.04.103.

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Purpose. The research purpose is to study the formation of quantitative-qualitative indicators of mined coal under conditions of dynamic changes in space and time with a new stope mining technology with waste rock accumulation in the underground mined-out area. Methods. The contours are formed for mining low-thickness coal reserves and extracting thicknesses, undercut rock volumes in the stoping and preparatory faces in the conditions of the Heroiiv Kosmosu mine. The average density values of coal, rock layers and wall rocks in the seam within the boundaries of mining contours are determined b
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Takahiro, Hosokawa, Mayuki Uchiyama, Yutaka Tanami, Yumiko Sato, Yasuharu Wakabayashi, and Eiji Oguma. "A single-center experience of using milk scintigraphy in 251 pediatric patients: A retrospective study." Medicine 102, no. 45 (2023): e35746. http://dx.doi.org/10.1097/md.0000000000035746.

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To report our experience with milk gastroesophageal scintigraphy and the management of gastroesophageal reflux (GER) in children. In 251 pediatric patients we recorded age, underlying disease, central nervous system (CNS) disorders, and GER management. GER management was classified based on treatment plans: grade 0, non-pharmacological treatment; grade 1, non-pharmacological but using a nasogastric tube; grade 2, pharmacological treatment; grade 3, transpyloric feeding; and grade 4, Nissen fundoplication surgery. Patients were included in classified groups with (grades 2, 3, and 4) and without
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Dissertations / Theses on the topic "378.096:621.3"

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Гура, Тетяна Віталіївна. "Формування управлінської компетентності випускників електромашинобудівних спеціальностей технічних університетів". Thesis, Класичний приватний університет, 2011. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17629.

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Дисертація на здобуття наукового ступеня кандидата педагогічних наук зі спеціальності 13.00.04 – теорія і методика професійної освіти. – Класичний приватний університет. – Запоріжжя, 2011. У дисертації розглянуто питання формування управлінської компетентності у вищому технічному закладі. Уточнено поняття "компетентність", "управлінська компетентність". Визначено основні структурні компоненти управлінської компетентності у майбутніх інженерів електромашинобудівного напряму. Виокремлено комплекс педагогічних умов формування управлінської компетентності. В результаті експериментальної перевірки
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Biller, Martin [Verfasser], Johann [Akademischer Betreuer] Jäger, Johann [Gutachter] Jäger, and Markus [Gutachter] Zdrallek. "Schutzalgorithmen für dynamisch vermaschte Ringnetzstrukturen mit dezentraler Einspeisung / Martin Biller ; Gutachter: Johann Jäger, Markus Zdrallek ; Betreuer: Johann Jäger." Erlangen : FAU University Press, 2021. http://d-nb.info/1238359108/34.

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Wruk, Julian [Verfasser]. "An Optimisation Approach to Automated Strategic Network Planning at Low-Voltage Level / Julian Wruk." Berlin : epubli, 2021. http://d-nb.info/1239980744/34.

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Antolino, Rivas David. "Reputation systems and secure communication in vehicular networks." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/117532.

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A thorough review of the state of the art will reveal that most VANET applications rely on Public Key Infrastructure (PKI), which uses user certificates managed by a Certification Authority (CA) to handle security. By doing so, they constrain the ad-hoc nature of the VANET imposing a frequent connection to the CA to retrieve the Certificate Revocation List (CRL) and requiring some degree of roadside infrastructure to achieve that connection. Other solutions propose the usage of group signatures where users organize in groups and elect a group manager. The group manager will need to ensure that
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Brandano, Davide. "Design of Frequency divider with voltage vontrolled oscillator for 60 GHz low power phase-locked loops in 65 nm RF CMOS." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/81303.

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Increasing memory capacity in mobile devices, is driving the need of high-data rates equipment. The 7 GHz band around 60 GHz provides the opportunity for multi-gigabit/sec wireless communication. It is a real opportunity for developing next generation of High-Definition (HD) devices. In the last two decades there was a great proliferation of Voltage Controlled Oscillator (VCO) and Frequency Divider (FD) topologies in RF ICs on silicon, but reaching high performance VCOs and FDs operating at 60 GHz is in today's technology a great challenge. A key reason is the inaccuracy of CMOS active and pas
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Hermoso, Costa Juan Ramón. "Modelado y estudio del líder descendente negarivo en una descarga eléctrica atmosférica y su influencia en la localización del punto de impacto del rayo." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/101398.

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In lightning protection techniques a basic aspect is the identification of the impact point possible, which is determined by the evolution of the initial phase of the lightning, known as the stepped leader, the ground geometry and structures on it. In general, the available theoretical models are consistent with ideal situations and do not include situations such as non-vertical trajectories, non-flat terrain or complex structures. This work reviews and compares the most outstanding models in the literature on this subject and proposes a model for the study of the stepped leader based on th
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Junyent, Ferré Adrià. "Control of power electronic converters for the operation of wind generation." Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/108501.

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The present PhD thesis analyzes the modelling and control of the two main topologies of large scale variable speed wind turbines, the doubly fed induction generator and the permanent magnet synchronous generator wind turbines, to operate under different types of voltage sags. The first part of the thesis deals with the modelling of the wind turbine from the mechanics to the different types of generators and the power converter. The second part deals with the control of the wind turbine. First, three different control schemes of the doubly fed induction machine are analyzed, starting with the m
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Espina, Masramon Jordi. "Estudio e implementación de nuevas técnicas de modulación para la reducción de perturbaciones EMI en convertidores matriciales." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/113304.

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El procesamiento de la energía mediante convertidores electrónicos conmutados ha tomado una relevancia notable durante la última década, y presumiblemente será uno de los campos de la ingeniería con mayor proyección industrial en el futuro. La evolución continua en el campo de la electrónica de potencia ha hecho posible la fabricación de convertidores conmutados cada vez más compactos, capaces de manejar valores de tensión y corriente mayores, conmutando a frecuencias más elevadas. Estas mejoras provocan, a su vez, la generación de perturbaciones electromagnéticas (EMI) fuera del rango
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Gallemí, Rovira Oriol. "Aportacions a la transferència de tecnologia energètica aeroespacial: cap al vehicle verd construïble a Catalunya." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/124706.

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El present treball, culmina un període de recerca que va començar amb l’observació i mesura dels rendiments dels primers vehicles elèctrics del mercat contemporani i de les tècniques d’optimització energètica aeroespacial. Aquesta tesi recull i recopila les conclusions de tesis i projectes de final de carrera dirigides pel Dr. Ricard Bosch, esdevenint un graó més de la cadena cap al vehicle elèctric que ell mateix persegueix des de fa 30 anys.. L’estudi se centra al territori català per limitacions de desplaçaments i de contactes industrials, analitzant les capacitats de formació, les tècniq
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Ballesteros, Larrota Dora María. "Methods of covert communication of speech signals based on a bio-inspired principle." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/128961.

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This work presents two speech hiding methods based on a bio-inspired concept known as the ability of adaptation of speech signals. A cryptographic model uses the adaptation to transform a secret message to a non-sensitive target speech signal, and then, the scrambled speech signal is an intelligible signal. The residual intelligibility is extremely low and it is appropriate to transmit secure speech signals. On the other hand, in a steganographic model, the adapted speech signal is hidden into a host signal by using indirect substitution or direct substitution. In the first case, the scheme is
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Books on the topic "378.096:621.3"

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Electrical Engineering: Principles and Applications, International Edition. Pearson Education, Limited, 2013.

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Electrical engineering: Principles and applications. 5th ed. Pearson, 2011.

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Electrical Engineering: Principles and Applications, Global Edition. Pearson Higher Education & Professional Group, 2018.

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Electrical engineering: Principles and applications. 5th ed. PHI Learning Private Limited, 2011.

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Electrical Engineering: Principles & Applications. Pearson, 2013.

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Electrical engineering: Principles & applications. Pearson Custom Publishing, 2008.

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Electrical Engineering: Principles & Applications. Pearson, 2017.

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Electrical Engineering: Principles And Applications. Phi Learning Private Limited, 2009.

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Electrical Engineering: Solutions Manual. Prentice Hall,US, 2012.

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Basic electricity: [700 fully solved problems]. 2nd ed. McGraw-Hill, 2009.

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