Analysis of a Gyroscope＇s Rotor Nonlinear Supported Magnetic Field Based on the B-Spline Wavelet-FEM

A supported framework of a gyroscope＇s rotor is designed and the B-Spline wavelet finite element model of nonlinear supported magnetic field is worked out. A new finite element space is studied in which the scaling function of the B-spline wavelet is considered as the shape function of a tetrahedton. The magnetic field is spited by an artificial absorbing body which used the condition of field radiating, so the solution is unique. The resolution is improved via the varying gradient of the B-spline function under the condition of unchanging gridding. So there are some advantages in dealing with the focus flux and a high varying gradient result from a nonlinear magnetic field. The result is more practical. Plots of flux and in the space is studied via simulating the supported system model. The results of the study are useful in the research of the supported magnetic system for the gyroscope rotor.     

自适应神经模糊系统在托砖架最高温度预测中的应用

气流床气化炉在气化工业中得到了广泛应用，托砖架用于支撑气化炉耐火砖的重量，必须有足够的强度，温度是托砖架强度的重要影响因素。传统方法使用有限单元法计算，需要编制复杂的计算机程序。本文使用已有软件计算出托砖架最高温度点温度，对一个自适应神经模糊系统(ANFIS)进行训练，然后对未知数据进行预测，取得了准确的结果。     

阀控式铅酸蓄电池正极板劣化模式分析

对于阀控式铅酸蓄电池而言 ,除了制造过程中产生的缺陷以外 ,正极板劣化是其寿命终止的主要原因之一。本文将从板栅、活物质、电解液以及他们之间的相互关系等角度出发 ,对阀控式铅酸蓄电池的正极板劣化模式进行了详细的论述 ,并针对不同的劣化原因提出了相应的改善方法。     

Microstructures of laser cladding of intermetallic-ceramic composite coatings

The microstructures of laser cladding of (Ni-24.5%(atom fraction)Al)+5O%(mass haction)WC coatingsbefore and after aging was comparetively studied by using SEM and TEM. It is shown that dissolving of WC and reprecipitating in the forms of WC and W,Coccurred during laser cladding, and intermetallic γ' (Ni3Al) orderly precipitatefrom metastable supersaturant Ni-matrix solid solution after heat treatment. The structures are favorable for coating'sproperties.     

多点广播传输协议MTP的研究和改进

本文描述了Internet网络工作组提出的支持多点广播的传输层协议MTP,指出导致其关键数据传输可靠性较低的根本原因是NAK数据确认方式,并提出依靠层次型ACK确认方式对其进行改进,保证关键数据传输的高可靠性,并且证明改进后的MTP协议模型的系统性能有所改善.     

Incremental Feature Selection

Feature selection is a problem of finding relevant features. When the number of features of a dataset is large and its number of patterns is huge, an effective method of feature selection can help in dimensionality reduction. An incremental probabilistic algorithm is designed and implemented as an alternative to the exhaustive and heuristic approaches. Theoretical analysis is given to support the idea of the probabilistic algorithm in finding an optimal or near-optimal subset of features. Experimental results suggest that (1) the probabilistic algorithm is effective in obtaining optimal/suboptimal feature subsets; (2) its incremental version expedites feature selection further when the number of patterns is large and can scale up without sacrificing the quality of selected features.     

复杂电力系统灾变防治的综合集成方法论

电网的大规模互联成为世界范围内电力系统发展的必然趋势。现代电力系统的强非线性和高维等复杂特性,使得传统的理论分析方法已不能较好地分析复杂电网的动态行为及由电网连锁反应故障造成的大面积停电事故的成因。作为科学的方法论,综合集成方法论综合了计算机网络技术、数据融合技术、知识与信息及专家群体智能的各方面优势,其应用在研究方式和工作方式上都突破了传统还原论思想的束缚。从复杂性科学的角度,介绍了复杂电力系统的特征,并着重论述了应用研究复杂系统的方法论——从定性到定量综合集成方法进行电力系统灾变防治研究的方法。     

基于DSP非同步控制的新型软起动系统

提出了一种基于自关断器件拓扑结构主电路的新型软起动系统．该系统实现了触发脉冲的 非同步控制，而且能够消除定子电流的低次谐波。与晶闸管控制的软起动相比，新型软起动控制简单，节能效果突出。该系统采用DSP和单片机构成的双CPU结构，实现数据处理和系统监控的并行处理，提高系统的响应速度和可靠性。结果表明，该系统具有很好的可行性和广阔的应用前景。     

25%抗蚜威水分散粒剂的制备

从工业生产角度出发介绍了工业制备农药杀虫剂"25%抗蚜威水分散粒剂"的原料、配方、工艺、装置、过程及产品的性能.由于选用了硅藻土、高岭土等材料,使之成为了一种极具实用价值的环保剂型.该工艺涉及了崩解、悬浮、润湿、细度等性能.该工艺已经该厂200t/年生产装置运行实践.