Modeling of Planar Spiral Inductors Between Two Multilayer Media for Induction Heating Applications

We present an analytical model of the equivalent impedance of an n-turn planar winding sandwiched between top and bottom multilayer media. Although the model's general and compact notation is valid for all systems involving magnetic dipoles and stratified media, perhaps its main application is domestic induction heating systems. The proposed model is based on the vector potential solution of a single-turn coil located between two multilayer media, and this result is extended to n-turn coils. We demonstrate the applicability of the model by a variety of examples. We present experimental results to justify the theoretical model     

Bridge Designs for Modeling Systems With Low Noise

For deterministic computer simulations, Gaussian process models are a standard procedure for fitting data. These models can be used only when the study design avoids having replicated points. This characteristic is also desirable for one-dimensional projections of the design, since it may happen that one of the design factors has a strongly nonlinear effect on the response. Latin hypercube designs have uniform one-dimensional projections, but are not efficient for fitting low-order polynomials when there is a small error variance. D-optimal designs are very efficient for polynomial fitting but have substantial replication in projections. We propose a new class of designs that bridge the gap between D-optimal designs and D-optimal Latin hypercube designs. These designs guarantee a minimum distance between points in any one-dimensional projection allowing for the fit of either polynomial or Gaussian process models. Subject to this constraint they are D-optimal for a prespecified model.     

感应加热在铸旋铝合金车轮中的应用

目的提升铸旋铝合金车轮的制造技术,探索铸旋车轮的制造短流程工艺。方法采用感应加热的方式取代传统工业炉对毛坯加热,并进行了试验研究。从感应加热理论、室温和200℃毛坯加热后的温度变化、旋压后的毛坯组织和机械性能方面进行了详细的分析。结果旋压后车轮的屈服强度能够达到180 MPa,抗拉强度能够达到280 MPa以上,温度能够满足目前360~400℃的旋压工艺需求。结论为今后实现铸旋铝合金车轮的制造短流程和工艺规划提供了重要参考。     

A Multi-Level Trend-Renewal Process for Modeling Systems With Recurrence Data

A repairable system is a system that can be restored to an operational state after a repair event. The system may experience multiple events over time that are called recurrent events. To model the recurrent event data, the renewal process (RP), the nonhomogenous Poisson process (NHPP), and the trend-renewal process (TRP) are often used. Compared to the RP and NHPP, the TRP is more flexible for modeling, because it includes both RP and NHPP as special cases. However, for a multi-level system (e.g., system, subsystem, and component levels), the original TRP model may not be adequate if the repair is effected by a subsystem replacement and if subsystem-level replacement events affect the rate of occurrence of the component-level replacement events. In this article, we propose a general class of models to describe replacement events in a multi-level repairable system by extending the TRP model. We also develop procedures for parameter estimation and the prediction of future events based on historical data. The proposed model and method are validated by simulation studies and are illustrated by an industrial application. This article has online supplementary materials.     

Multiresponse Estimation With Special Application to Linear Systems of Differential Equations

We present a multiresponse estimation procedure for parameters of systems described by ? = As. The procedure features a generalized Gauss–Newton algorithm for optimizing the determinant criterion, efficient evaluation of the expectation function and its derivatives directly from the reaction network or compartment diagram, automatic determination of starting values, and eficient computational procedures for handling linear constraints on the responses.     

时域有限差分算法与遗传算法在平面螺旋电感设计中的应用

文章通过电磁场时域有限差分(FDTD)算法与遗传算法(GA)相结合进行平面螺旋电感设计。通过优化单元网格大小，可优化设计整个平面螺旋电感（包含空气桥）的结构尺寸。介绍了该方法既能够进行严格的电磁场求解，又可以避免繁杂的实验过程，是优化设计的一种有效而准确的手段。     

企业信息系统应用集成的语义模型方法

分析了企业信息系统应用集成中存在的语法及语义不一致问题,将基于本体的语义模型引入到企业信息系统解决集成问题的方案中.依据企业语义模型组织进行5个层次划分的思想,对纵向一体化的供应链企业间信息系统应用集成建模提供指导思想.     

PC104嵌入式系统在CAKT系列巡检仪中的应用

由PC104总线组成的嵌入式系统是CAKT系列巡检仪的处理中心,主要完成测量线路接地状态的探测、测量前端信号的接收和处理以及数据多功能界面的显示、报警等功能的实现。本文介绍了PC104的特点及其在CAKT温度巡检仪中的应用,阐述了CAKT系列温度巡检仪的工作原理、工作方式和功能界面。     

Communication Systems Interactive Software (COMSIS): Modeling of Components and its Application to the Simulation of Optical Communication Systems

comsis, which stands for communication systems interactive software, is a computer-aided-design tool based on a time approach. It allows the design, analysis, and performance optimization of optical transmission systems by use of various optical devices. comsis allows scalar or vectorial simulations, depending on whether the polarization is taken into account. An overview concerning the optical component models is given. A new model of an erbium-doped fiber amplifier allows the user to describe the amplifier through either physical or system parameters by using silicate or fluoride glass fibers or any other material, provided the user can give a file that contains the amplifier's characteristics. The new model of a single-mode fiber allows the user to describe chromatic dispersion through a constant, a function, or a file (given by the user) and to take optionally into account the Kerr and the Raman effects and the polarization-mode dispersion. The simulation tools that are used to characterize the quality of an optical transmission system are also presented. To show the system's full range of capabilities in the optical domain, we describe examples of wavelength-division-multiplexing and soliton-transmission systems.     

A Study of the Polarization of Fluorescence of Ordered Systems With Application to Ordered Liquid Crystals

The fluorescence polarization of uniaxial molecules dissolved in an ordered medium is studied. A theoretical model is developed which relates the polarization of the fluorescence emission to molecular structure, orientation of absorption and emission dipole oscillators and the degree of ordering. This theory was tested experimentally using all trans 1,6-diphenyl-1,3,5-hexatriene dissolved in an ordered liquid crystal.     

测量系统分析(MSA)在计量工作中的应用

本文在测量系统分析与企业计量工作在企业管理中的重要作用的基础上,阐述了两者之间的相互关系,进而讨论了测量系统分析在计量工作的应用及技术改进措施,为科学地评价测量系统、确定测量系统的检定周期、合理进行测量系统的预防性维护和纠正性维护、提高测量系统的有效性等提供重要的依据,具有很高的学术价值和实际意义.     

多尺度法在阻尼多自由度系统中的应用

研究多尺度法在阻尼多自由度系统中的应用，给出弱阻尼情况下两自由度系统系自由振动的算例，并与复模态法所得结果进行数值比较。     

高档别墅空调系统形式应用分析

对别墅冷热源方案的确定,空调方式的选择进行了深入分析,提出了适合别墅采用的空调系统形式,以满足用户和房地产开发商的利益要求。     

Microcomputer-Controlled Measurement Systems Application to Flow Measurements and to Spectrometry

Two measuring systems driven by microcomputer are presented: flowrate ultrasonic measurements and coherent anti-Stokes Raman spectroscopy. It is shown how the integration of standard interfaces and specific electronics made it possible to develop these two applications from a single basic system.     

Application of Ferrography to Fault Diagnosis of Hydraulic Systems

This paper deals with research on the successful use of ferrography as a wear measurement method for condition monitoring and fault diagnosis of hydraulic sistems.The analysis program and progression is discussed,and a case study for condition monitoring and fault diagnosis of hydraulic systems by means of ferrographys is also reviewed.     

纳米荧光探针在药物输送中的应用

药物载体的开发具有悠久的历史,但是传统的药物载体并不具备可观察性和可追踪性,将纳米荧光探针应用于药物载体中有望解决此问题。重点概述了纳米荧光探针应用于药物载体中的实例以及新型药物载体的开发应用,探讨了不同纳米荧光探针的优缺点。