变压器铁心最优截面设计计算方法

论述了变压器铁心在最小级片宽和级数约束条件下最优截面的设计计算方法，并提供了详细的设计计算数据。     

基于构件的银行综合业务系统的研究和实现

软件复用通过设计构件来搭建新的系统,构件是软件复用的基础元素。通过软件复用可以大大减少软件开发中的重复劳动,提高开发效率和保证软件质量。本文主要是通过研究和探讨基于构件的银行综合业务系统开发的相关技术和方案,对基于构件技术的开发过程进行分析,并指出了在实现中遇到的技术问题和解决方法,从而为信息系统的设计与实现提出了参考模型和方案。     

SPWM信号产生系统IP软核设计及验证

针对电力电子领域的需求,采用自然采样法设计了一个全数字三相SPWM信号产生系统IP软核.通过数字频率合成技术实现了对电源频率的精确控制,使电源频率精度达到16位.其中,通过调节控制参数,分别实现了电源频率与载波频率的7级、8级控制.最后,搭建了基于FPGA的测试系统,验证了系统功能的正确性.     

变压器铁心截面优化工程软件的开发

介绍了变压器铁心截面优化软件的优点和功能,论述了该软件的设计原理、方法和计算程序流程,对Ф100mm～Ф300mm之间铁心直径的叠积尺寸进行了优化设计,并与参考文献提供的数据进行了对比.     

变压器铁芯多点接地故障的诊断及其处理方法

分析云浮供电局所属变压器铁芯故障的类型和原因作为例子。说明通过气相色谱分析法和CAM-3型主变铁芯多点接地故障监视器,可以初步判断铁芯是否存在接地故障,再用直流或交流法准确的查找出铁芯接地的故障点。针对不同的情况,用电容放电冲击或大电流冲击法等均能有效的消除故障点。     

Fluid effects on the core scismic behavior of a liquid metal reactor

In this paper, a numerical application algorithm for applying the CFAM (Consistent Fluid Added Mass) matrix for a core seismic analysis is developed and applied to the 7-ducts core system to investigate the fluid effects on the dynamic characteristics and the seismic time history responses. To this end, three cases such as the in-air condition, the in-water condition without the fluid coupling terms, and the in-water condition with the fluid coupling terms are considered in this paper. From modal analysis, the core duct assemblies revealed strongly coupled out-of-phase vibration modes unlike the other cases with the fluid coupling terms considered. From the results of the seismic time history analysis, it was also verified that the fluid coupling terms in the CFAM matrix can significantly affect the impact responses and the seismic displacement responses of the ducts.     

漏洞检测类产品核心指标浅析

本文对漏洞检测类的产品选型做了一些探索和研究,并参考了相关的国家标准和国外测评机构的测试方法、测试报告,主要对漏洞检测类产品的核心指标进行了分析和探讨。     

基于PowerPC 405的 SOPC 简单应用

介绍PowerPC 405嵌入式处理器的结构特性及其软件开发环境,给出基于PowerPC405的SOPC简单应用实例。     

Magnetic‐Core/Porous‐Shell CoFe2O4/SiO2 Composite Nanoparticles as Immobilized Affinity Supports for Clinical Immunoassays

This study demonstrates a novel approach towards the development of advanced protein assay systems based on physically functionalized, magnetic‐core/porous‐shell CoFe₂O₄/SiO₂ composite nanoparticles. The preparation, characterization, and measurement of the relevant properties of the protein assay system is discussed, and the system is used for the detection of cancer antigen 15‐3 (CA 15‐3, used as a model here) in clinical immunoassays. The protein assay system, based on nanometer‐sized magnetic cores and silica shells, shows good adsorption properties for the selective attachment of CA 15‐3 antibodies specific to CA 15‐3. The core/shell nanostructures exhibit good magnetic properties, which enables their integration into a quartz crystal microbalance (QCM) detection cell with the help of a permanent magnet. Under optimal conditions, the resulting immunoassay system presents a good QCM response for the detection of CA 15‐3, and allows the detection of CA 15‐3 at concentrations as low as 1.5 U mL^–1 (U: units). Importantly, the proposed protein assay system can be extended to the detection of other antigens and biological compounds.     

Antibody‐Functionalized Hybrid Superparamagnetic Nanoparticles

Superparamagnetic hybrid nanoparticles (ca. 80 nm) are obtained. They consist of an inner iron oxide core coated by a silica shell, which is in turn functionalized with amine or carboxyl groups and covalently coupled to a monoclonal antibody (anti‐hCG; hCG = human chorionic gonadotropin). The prepared nanoparticles show a specific magnetic moment (per gram of iron) that is comparable to that measured for commercial superparamagnetic iron oxide preparations. The bioactivity of the antibody‐conjugated magnetic nanoparticles is verified by a standard bioassay. These results indicate the potential of the hybrid nanoparticles prepared for use as enhanced contrast agents in magnetic resonance imaging applications.