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电枢磁场对零序谐波磁场励磁电流的影响机理分析与抑制

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中国电机工程学报 2019年第19期39卷 5867-5875页

作者：姚飞安群涛孙立志 LIPO Thomas anthony 哈尔滨工业大学电气工程系黑龙江省哈尔滨市150001 威斯康星大学麦迪逊分校电气与计算机工程学院美国麦迪逊53706

基于零序空间谐波磁场励磁的无刷同步电机,励磁电流的建立与电枢绕组中所注入的零序电流及转子谐波绕组的分布密切相关。同时,高次电枢谐波磁场和齿谐波磁场会对励磁电流产生干扰。为了提高励磁电流的稳定性和调节性能,该文深入分析合... 详细信息

基于零序空间谐波磁场励磁的无刷同步电机,励磁电流的建立与电枢绕组中所注入的零序电流及转子谐波绕组的分布密切相关。同时,高次电枢谐波磁场和齿谐波磁场会对励磁电流产生干扰。为了提高励磁电流的稳定性和调节性能,该文深入分析合成电枢磁场产生的高次谐波和齿谐波电动势,研究干扰型谐波电动势对励磁电流的影响。并以2种具有不同槽极比结构的电机为例进行分析,表明在谐波绕组配合下,具有分数槽拓扑结构的电机转子谐波绕组中的高次谐波和齿谐波电动势得到明显削弱,励磁电流具有良好的调节特性。制作2种结构的样机进行实验,实验结果和2-d有限元结果一起验证了理论分析的正确性。

关键词：同步电机无刷励磁零序谐波磁场齿谐波谐波抑制

Analysis and Simulation of the Influence of Electromagnetic Fields on Living Beings near HV Power Lines Using the FdTd Method

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Open Journal of Applied Sciences 2023年第12期13卷 2343-2359页

作者： anthony Bassesuka Sandoka Nzao ISTA Kinshasa Electrical Engineering Kinshasa The Democratic Republic of the Congo

Recent decades have seen rapid advances in the field of electrical engineering, such that our environment has become a sea of electrical and magnetic signals, raising questions about the possible effects of low-frequency electromagnetic fields on the environment and which are capable of modifying and destroying our ecosystem. Particular interest was given in this article due to a massive influx of population living near high voltage lines. The analysis and simulation of the influence of low frequency electromagnetic fields on living beings in the vicinity of high voltage sources 132 kV and 220 kV in urban areas in dR Congo is the subject of our research with a view to estimating the level of exposure of humans to low frequency electromagnetic fields. To carry out our research, we used the classic method of analyzing the field produced near a high voltage line based on Maxwell’s image theory, the Maxwell-Gauss theorem and Maxwell-Ampère theorem to model and quantify low-frequency electromagnetic fields in the vicinity of high-voltage lines. The 2d FdTd numerical formulation was developed from telegraphers’ equations and allowed us to obtain models of current and voltage induced by electromagnetic fields on living beings below and near HV lines. The different simulations carried out on the proposed models illustrate the effects of the electrical and geometric parameters of the pylons on the distribution of the electromagnetic field in the vicinity of the HV lines. The results obtained were compared to the safety limits recommended by the standards.

关键词： Low Frequency Electromagnetic Field Modeling Field and Health Maxwell’s Equations FdTd Method Electromagnetic Compatibility High Voltage Line

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对铬鞣过程的重新认识(英文)

皮革科学与工程 2002年第1期12卷 3-10,60页

作者： anthony d.Covington 英国南安普顿大学英国皮革研究中心

铬鞣在全球范围内早已得到了成功的应用，人们对铬鞣的使用已很熟悉，对铬鞣过程也能容易地控制，对铬鞣的研究和对铬鞣过程的认识也达到了相当的高度。但如果利用目前的一些新的研究手段进行进一步的研究，站在新的角度和更高的水平对... 详细信息

铬鞣在全球范围内早已得到了成功的应用，人们对铬鞣的使用已很熟悉，对铬鞣过程也能容易地控制，对铬鞣的研究和对铬鞣过程的认识也达到了相当的高度。但如果利用目前的一些新的研究手段进行进一步的研究，站在新的角度和更高的水平对铬鞣过程进行重新分析和认识，会发现以前的一些认识包括一些过去对铬鞣过程阐述的文献中存在着一些不合理和不尽完善的地方，因此有必要对铬鞣过程中的传统观念进行重新认识，来进一步完善铬鞣理论。本文针对铬鞣过程中的一些已被普遍理解和广泛接受的观点进行了新的分析，目的是为了纠正人们关于铬鞣的认识理解方面的一些误解，进一步完善铬鞣的理论。主要从以下几方面进行了分析、阐述：１．铬（Ⅲ）离子在鞣制过程中的单独作用：铬鞣具有较高的湿热稳定性，并不只是单独的铬（Ⅲ）离子的作用，而是铬（Ⅲ）离子与其反离子的共同协同作用的结果；２．硫酸根离子在铬鞣历程中的作用；３．铬（Ⅲ）配离子的形状与大小；４．结合铬的碱度问题；５．铬鞣过程中的交联作用的问题；６．铬与胶原的作用点问题；７．ｐＨ值和温度在铬鞣过程中的作用问题；８．高碱度铬的反应活性的问题；９．乙醇胺在铬鞣中的作用；１０，蒙囿反应；１１．多点蒙囿；１２．蒙囿?

关键词：皮革铬鞣过程鞣制原理

Tree stand falls: A persistent cause of neurological injury in hunting

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World Journal of Clinical Cases 2014年第8期2卷 345-350页

作者： Clifford A Pierre Benjamin A Plog Vasisht Srinivasan Kaushik Srinivasan anthony L Petraglia Jason H Huang School of Medicine and dentistry University of RochesterRochesterNY 14623United States department of Neurosurgery University of Rochester Medical CenterRochesterNY 14642United States School of Law Case Western Reserve UniversityClevelandOH 44106United States department of Neurosurgery Rochester Regional Health SystemRochesterNY 14626United States

AIM: To characterize and compare our current series of patients to prior reports in order to identify any changes in the incidence of neurological injury related to hunting accidents in Rochester, New ***: All tree stand-related injuries referred to our regional trauma center from September 2003 through November 2011 were reviewed. Information was obtained from the hospital's trauma registry and medical records were retrospectively reviewed for data pertaining to the ***: Fifty-four patients were identified. Ninetysix percent of patients were male with a mean age of 47.9 years(range 15-69). The mean Injury Severity Score was 12.53 ± 1.17(range 2-34). The average height of fall was 18.2 feet(range 4-40 feet). All patients fell to the ground with the exception of one who landed on rocks, and many hit the tree or branches on the way down. A reason for the fall was documented in only 13 patients, and included tree stand construction(3), loss of balance(3), falling asleep(3), structural failure(2), safety harness breakage(3) or lightheadedness(1). The most common injuries were spinal fractures(54%), most commonly in the cervical spine(69%), followed by the thoracic(38%) and lumbar(21%) spine. Eight patients required operative repair. Head injuries occurred in 22%. Other systemic injuries include rib/clavicular fractures(47%), pelvic fractures(11%), solid organ injury(23%), and pneumothorax or hemothorax(19%). No patient deaths were reported. The average hospital length of stay was 6.56 ± 1.07 d. Most patients were discharged home without(72%) or with(11%) services and 17% required rehabilitation. CONCLUSION: Falls from hunting tree stands are still common, with a high rate of neurological injury. Compared to a decade ago we have made no progress in preventing these neurological injuries, despite an increase in safety advances. Neurosurgeons must continue to advocate for increased safety awareness and participate in leadership roles to improve outcom

关键词： Neurological sports medicine Hunting Tree stand falls Spine injury Traumatic brain injury

Real-Time Thermomechanical Modeling of PV Cell Fabrication via a POd-Trained RBF Interpolation Network

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Computer Modeling in Engineering & Sciences 2020年第3期122卷 757-777页

作者： Arka das anthony Khoury Eduardo divo Victor Huayamave AndresCeballos Ron Eaglin Alain Kassab Adam Payne Vijay Yelundur Hubert Seigneur Embry-Riddle Aeronautical University Department of Mechanical Engineering1 Aerospace Blvd.Daytona BeachFL 32114USA. Central Technological Corporation LongwoodFL 32779USA. University of Central Florida Department of Mechanical and Aerospace Engineering4000 Central Florida Blvd.OrlandoFL 32816USA. Suniva Inc. 5765 Peachtree Industrial Blvd.NorcrossGA 30092USA. Florida Solar Energy Center University of Central FloridaCocoa BeachFL 32922USA.

This paper presents a numerical reduced order model framework to simulate the physics of the thermomechanical processes that occur during c-Si photovoltaic(PV)cell fabrication.A response surface based on a radial basis function(RBF)interpolation network trained by a Proper Orthogonal decomposition(POd)of the solution fields is developed for fast and accurate approximations of thermal loading conditions on PV cells during the fabrication *** outcome is a stand-alone computational tool that provides,in real time,the quantitative and qualitative thermomechanical response as a function of user-controlled input parameters for fabrication processes with the precision of 3d finite element analysis(FEA).This tool provides an efficient and effective avenue for design and optimization as well as for failure prediction of PV cells.

关键词： Silicon wafers photovoltaic cell contact firing proper orthogonal decomposition radial basis functions.

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充分利用一线生机

经理人 2006年第4期 64-67页

作者： Scott d.anthony

2000年代初期，摩托罗拉这个20年前曾在移动电话行业独领风骚的企业似乎有点迷失方向。无疑，这个通信业巨头仍在全球移动电话市场上拥有骄人的市场份额，但是，芬兰的诺基亚己占据了领先地位，而新兴的韩国竞争对手三星与LG则引领手机... 详细信息

2000年代初期，摩托罗拉这个20年前曾在移动电话行业独领风骚的企业似乎有点迷失方向。无疑，这个通信业巨头仍在全球移动电话市场上拥有骄人的市场份额，但是，芬兰的诺基亚己占据了领先地位，而新兴的韩国竞争对手三星与LG则引领手机时尚。

关键词：生机利用移动电话行业移动电话市场摩托罗拉市场份额领先地位竞争对手线通信业

Automatic body condition scoring system for dairy cows based on depth-image analysis

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 45-54页

作者： Kaixuan Zhao anthony N.Shelley daniel L.Lau Karmella A.dolecheck Jeffrey M.Bewley College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023China Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture Ministry of Agriculture andRural AffairsHangzhou 310058China College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China department of Electrical Engineering University of KentuckyLexington 40546USA department of Animal and Food Sciences University of KentuckyLexington 40546USA Alltech Inc. Nicholasville 40356USA

Body condition score(BCS)is an important management tool in the modern dairy industry,and one of the basic techniques for animal welfare and precision dairy *** objective of this study was to use a vision system to evaluate the fat cover on the back of cows and to automatically determine BCS.A 3d camera was used to capture the depth images of the back of cows twice a day as each cow passed beneath the *** background subtraction,the back area of the cow was extracted from the depth *** thurl,sacral ligament,hook bone,and pin bone were located via depth image analysis and evaluated by calculating their visibility and curvature,and those four anatomical features were used to measure fatness.A dataset containing 4820 depth images of cows with 7 BCS levels was built,among which 952 images were used as training *** four anatomical features as input and BCS as output,decision tree learning,linear regression,and BP network were calibrated on the training dataset and tested on the entire *** average,the BP network model scored each cow within 0.25 BCS points compared to their manual scores during the study *** measured values of visibility and curvature used in this study have strong correlations with BCS and can be used to automatically assess BCS with high *** study demonstrates that the automatic body condition scoring system has the possibility of being more accurate than human scoring.

关键词： body condition score depth-image processing curvature analysis machine learning precision dairy farming

Skin bioprinting:the future of burn wound reconstruction?

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Burns & Trauma 2019年第1期7卷 25-36页

作者： Mathew Varkey dafydd O.Visscher Paul P.Mvan Zuijlen anthony Atala James J.Yoo Wake Forest Institute for Regenerative Medicine Wake Forest School of MedicineMedical Center BoulevardWinston-SalemNC 27101USA department of Plastic Reconstructive and Hand SurgeryAmsterdam University Medical Center1081HVAmsterdamThe Netherlands Amsterdam Movement Sciences AmsterdamThe Netherlands Burn Center Red Cross Hospital1942LEBeverwijkThe Netherlands Association of dutch Burn Centres 1942LEBeverwijkThe Netherlands

Burns are a significant cause of trauma,and over the years,the focus of patient care has shifted from just survival to facilitation of improved functional ***,burn treatment,especially in the case of extensive burn injuries,involves surgical excision of injured skin and reconstruction of the burn injury with the aid of skin *** skin substitutes do not contain all skin cell types and do not facilitate recapitulation of native skin ***-dimensional(3d)bioprinting for reconstruction of burn injuries involves layer-by-layer deposition of cells along with scaffolding materials over the injured *** bioprinting can be done either in situ or in *** these approaches are similar except for the site of printing and tissue *** are technological and regulatory challenges that need to be overcome for clinical translation of bioprinted skin for burn ***,the use of bioprinting for skin reconstruction following burns is promising;bioprinting will enable accurate placement of cell types and precise and reproducible fabrication of constructs to replace the injured or damaged ***,3d bioprinting is a very transformative technology,and its use for wound reconstruction will lead to a paradigm shift in patient *** this review,we aim to introduce bioprinting,the different stages involved,in vitro and in vivo skin bioprinting,and the various clinical and regulatory challenges in adoption of this technology.

关键词： Bioprinting Skin Burns Reconstruction

Atrial fibrillation ablation in patients with heart failure review

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World Journal of Cardiovascular diseases 2013年第1期3卷 49-57页

作者： Mohammad I. Amin Laurence d. Sterns Richard A. Leather anthony S. Tang department of Cardiology Royal Jubilee Hospital Victoria Canada

Atrial fibrillation and heart failure often coexist in patients with advanced heart failure symptoms. The result, in addition to a significant impact on quality of life, is an increase in the risk of a adverse clinical outcomes including stroke, hospitalization and overall mortality. Pharmacological therapy for atrial fibrillation in the heart failure population remains limited due to sub-optimal drug efficacy and a likely increased mortality due to pro-arrhythmia. Atrial fibrillation ablation, since it allows for therapy without the need for toxic medication, has the potential to become mainstream treatment in patients with drug refractory, symptomatic atrial fibrillation and heart failure. Randomized studies and observational data suggest that atrial fibrillation ablation provides superior rhythm control to anti-arrhythmic drugs. Atrial fibrilla- tion ablation is relatively safe and may result in improvement of left ventricular function and quality of life. Ongoing studies are attempting to assess a number of outcome measures to help define its role in the heart failure patient population. This review focuses on atrial fibrillation ablation in patients with congestive heart failure, and summarizes the results of available literature.

关键词： Atrial Fibrillation Ablation Heart Failure