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Search Results: 1 - 10 of 8343 matches for " Yuanbin KANG "
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Reform and Exploration on Electric Circuit Course Teaching Based on CDIO  [PDF]
Yuanbin Wang
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.73048
Abstract: In light of the current problems about Electric Circuit course teaching in universities, the problems in the current teaching of the course are presented and analyzed. The international idea of CDIO is put forward and introduced, and this educational mode is applied in Electric Circuit course teaching. Reform is made to change the current situation that students are weak in experiments and practice links, and concrete measures are proposed. It is shown that this teaching mode can help students not only to promote the understanding and grasp the knowledge points but also it can improve the innovation ability, engineering ability and cooperation ability, communication ability effectively. It will be helpful both to the graduates and society. This teaching mode proposed is effective and feasible.
Influence of Ar/N2 Flow Rate on Structure and Property for TaN/NbN Multilayered Coatings
Xuehua ZHANG,Yuanbin KANG,Sipeng LIU,Qiang LI,Ying YANG,Xiangyun DENG,Dejun LI,
Xuehua
,ZHANG,Yuanbin,KANG,Sipeng,LIU,Qiang,LI,Ying,YANG,Xiangyun,DENG,Dejun,LI

材料科学技术学报 , 2007,
Abstract: TaN/NbN multilayered coatings with nanoscale bilayer periods were synthesized at different Ar/N2 flow rates by RF (radio frequency) magnetron sputtering. XRD (X-ray diffraction) and Nano Indenter System were employed to investigate the influence of Ar/N2 flow rate (FAr:FN2) on microstructure and mechanical properties of the coatings. The low-angle XRD pattern indicated a well-defined composition modulation and layer structure of the multilayered coating. All multilayered coatings almost revealed higher hardness than the rule-of-mixtures value of monolithic TaN and NbN coatings. At FAr:FN2=10, the multilayered coating possessed desirable hardness, elastic modulus, internal stress, and fracture resistance, compared with ones synthesized at other Ar/N2 flow rates. The layered structure with strong mixture of TaN (110), (111), (200) and Nb2N (101)textures should be related to the enhanced mechanical properties.
Precipitating Mechanism of Carbide in Cold-Welding Surfacing Metals
Yuanbin ZHANG,Dengyi REN,
Yuanbin
,ZHANG,and,Dengyi,REN

材料科学技术学报 , 2004,
Abstract: Carbides in a series of cold-welding weld metals were studied by means of SEM, TEM and EPMA, and the forming mechanism of carbide was proposed according to their distribution and morphology. Due to their different carbide-forming tendency, Nb and Ti could combine with C to form particulate carbide in liquid weld metal and depleted the carbon content in matrix, while V induced the carbide precipitated along grain boundary. But too much Nb or Ti alone resulted in coarse carbide and poor strengthened matrix. When suitable amount of Nb, Ti and V coexisted in weld metal, both uniformly distributed particulate carbide and well strengthened matrix could be achieved. It was proposed that the carbide nucleated on the oxide which dispersed in liquid weld metal, and then grew into multi-layer complex carbide particles by epitaxial growth. At different sites, carbide particles may present as different morphologies.
The specificity of neuroprotection by antioxidants
Yuanbin Liu, David R Schubert
Journal of Biomedical Science , 2009, DOI: 10.1186/1423-0127-16-98
Abstract: Using fluorescent dyes for ROS detection and mitochondrial inhibitors of known specificities, we studied ROS production under three conditions where ROS are produced by mitochondria: oxidative glutamate toxicity, state IV respiration induced by oligomycin, and tumor necrosis factor-induced cell death.We demonstrated that there are at least four mitochondrial ROS-generating sites in cells, including the flavin mononucleotide (FMN) group of complex I and the three ubiquinone-binding sites in complexes I, II and III. ROS production from these sites is modulated in an insult-specific manner and the sites are differentially accessible to common antioxidants.The inhibition of ROS accumulation by different antioxidants is specific to the site of ROS generation as well as the antioxidant. This information should be useful for devising new interventions to delay aging or treat ROS-related diseases.The production of reactive oxygen species (ROS) is greatly increased under many conditions of toxic stress [1,2]. However, existing antioxidants appear to be relatively ineffective in combating these problems, either because they cannot reach the site of ROS production, which is frequently within mitochondria, or because of their poor ability to scavenge the damaging ROS. Identifying compounds that directly block mitochondrial ROS production may be a novel way to inhibit oxidative stress, and perhaps delay aging and treat mitochondrial ROS-related diseases. However, it remains a challenge to define both the normal and pathologically relevant sites of ROS formation in the mitochondrial electron transport chain (ETC) and to find clinically useful agents that can minimize mitochondrial ROS production.The mitochondrial ETC is composed of a series of electron carriers (flavoproteins, iron-sulfur proteins, ubiquinone and cytochromes) that are arranged spatially according to their redox potentials and organized into four complexes (Figure 1). Electrons derived from metabolic reducing equi
A NOVEL DESIGN FOR DIGITAL QUADRATURE DETECTOR
一种数字式正交检波器的设计

Wu Yuanbin,
吴远斌

电子与信息学报 , 1997,
Abstract: This paper presents a novel technique for directly IF sampling and digitally obtaining the inphase (I) and quadrature (Q) components of the IF signal. Because all subsequent processing and detection are accomplished in the digital domain, it can provide even more unproved I and Q signals and improve the overall performance greatly. Finally an experimental scheme is provided.
An Algebraic Method for Estimating the Fundamental Matrix with Rank Constraint
Yuanbin Wang,Bin Zhang,Tianshun Yao
Journal of Computers , 2010, DOI: 10.4304/jcp.5.7.1027-1037
Abstract: The fundamental matrix captures the intrinsic geometric properties of two images of a same 3D scene. It should be of rank two for all the epipolar lines to intersect in a unique epipole. Traditional methods of enforcing the rank two property of the matrix are to parameterize the fundamental matrix during the estimation. This usually results in a system of nonlinear multivariable polynomial equations of higher degree. The solution of which is then hand over to some numerical techniques. Numerical precision analysis and convergence proof of these solutions are needed but neglected. This paper studies the structure of the typical nonlinear multivariable polynomial equations encountered in the fundamental matrix estimation with rank constraint. An algebraic method is presented to solve this type of equations. The method is based on the classical Lagrange multipliers method. After careful transformations of the problem, we reduce the problem to the solution of a single variable polynomial equation.
Particle Swarm Optimization with Complex Local Searching for Solving Optimal Moving Path for PCB
Mo Yuanbin,Xu Shuihua,Liu Jizhong
Advances in Mathematical and Computational Methods , 2011, DOI: 10.5729
Abstract: It is important for printed circuit boards (PCB) programming system to find out theoptimal moving path. However, determining the optimal moving path is a NP-hard travelingsalesman problem (TSP). Up to now, the drilling path automatic generated by programming systemmay not be the optimal. Based on Particle Swarm Optimization (PSO) and Complex Method (MC),a novel algorithm, Particle Swarm Optimization with Complex local searching (PSOC), is proposedin the paper. Numerical computations and algorithm performance analysis show that the approachhas global searching capability and can give satisfactory solutions. The algorithm is applied infinding the optimal moving path for PCB. The results have demonstrated the effectiveness andefficiency of the approach.
Research on a Novel Soft-Switching Buck Converter
Yuanbin Li,Peng Ge,Ben Niu
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: Based on classical zero voltage transition buck pwm converter, an ideal buck converter with pwm-controlled soft-switching circuit is proposed. The proposed auxiliary circuit allows the main switch to operate with zero-voltage switching. Besides, all of the semiconductor devices operate under soft-switching conditions. Thus, losses were reduced. It was analyzed in detail to demonstrate the operating principle of the novel circuit. Finally, simulation results are given analysis and the simulation results are provided to verify the performance of the proposed buck Converter.
Empirical Studies on Community Structure for Networked Web Services
Yuanbin Han,Shizhan Chen,Zhiyong Feng
International Journal of Computer Science Issues , 2013,
Abstract: This paper presents studies on detecting community structure in web services formed network, which can signi#64257;cantly explore and understand the underlying functionality and behavior of interactions among web services, as well as facilitate the state of art service computing. The community structure in this paper focusing on two typical social characteristics for networked web services: competition and collaboration. Competition-oriented community structure is based on the functional semantics (i.e. the inputs/outputs of web services), in which we group web services sharing common interests. Collaboration-oriented community structure is computed by the topological analysis, so that we can cluster web services that interact densely. We present empirical analysis on our dataset and the generated communities for capturing the insight dynamics for web services formed network. Besides, we also present some potential utilities which can accelerate service-oriented computing.
Determination of nuclear transcription factor activity using a modified electrophoretic mobility shift assay
Wang, Yong;Huang, Wenhua;Peng, Daizhi;Hu, Yuanbin;
Brazilian Archives of Biology and Technology , 2008, DOI: 10.1590/S1516-89132008000400025
Abstract: in this work, several major procedures of the electrophoretic mobility shift assay (emsa) were modified including swift extraction of the nucleic protein, labeling of the probe and radioautography. the modified assay required shorter time, simplified the nucleic protein extraction, increased the radioactivity of the labeling probe, skipped the tedious process of gel drying, and produced clear images. its results were comparable, reproducible and stable. it thus has merited for wide application.
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