基于Silverlight的富数据输入研究

针对站点中经常需要用户输入各类数据的现状,讨论了实现开发RIA应用的Silverlight技术以及ASP.NET/SilverlightWeb应用程序的N层逻辑设计,并在此基础上利用Silverlight技术较好地实现了电子商务RIA平台中一个富数据输入界面功能,提高了用户的体验。     

区域团购网的物流配送车辆路径问题

车辆路径问题（VRP）是物流配送系统研究中的一项重要内容。阐述了VRP的常见求解算法。针对区域团购网的车辆物流特点,给出了系统功能设计,建立了数学模型并用MATLAB编程实现物流配送车辆路径问题的求解。     

Surface properties of muscle protein extracts

The interfacial properties of proteins extracted from muscle using salt solutions of different concentration and for different extraction times were determined by the drop volume method. At a bulk phase concentration of 10(-2) wt%, it appears that the sarcoplasmic-rich fraction of muscle is more surface active than the salt-soluble fraction. The average equilibrium surface pressure at the air-liquid interface was 21·5 mN m(-1) for an aqueous extract and 20·1 mN m(-1) for a 1m KCl-extract. The equilibrium surface pressure decreased from 21·7 mN m(-1) to 19·50mN m(-1) as the extraction time with Weber-Edsall solution increased from 15 min to 48 h.     

Effect of zeranol on bull muscle fibre composition

Two trials are reported in which bulls were implanted with zeranol and slaughtered at 18 months. There was no significant change in carcass weight due to zeranol in either trial. Samples of the longissimus dorsi (LD) and splenius (Sp) were cross-cryosectioned, stained for myofibrillar ATPase and examined by conventional light microscopy. The stain resolved three fibre types: I, slow contracting with an oxidative metabolism, IIA, fast-oxidative-glycolytic and IIB, fast-glycolytic. In the LD from treated bulls, the occurrence of IIB fibres was increased, apparently at the expense of IIA fibres, as the occurrence of I fibres was unchanged. These occurrence changes parallelled previously reported effects of castration. Changes in Sp were less dramatic. In one trial IIB fibres were absent from all Sp muscles, but, in the other, some of the Sp muscles from treated animals contained these fibres whereas they were absent from the Sp of the control group. If the changes in fibre type occurrence due to zeranol extend to skeletal muscles other than LD and Sp, there is likely to be a subtle change in the musculature's metabolism. Fibre areas were largely unaffected by zeranol. In this respect zeranol did not mimic castration.     

一种发动机气缸体气孔缺陷分析及改进

以一种发动机气缸体气孔缺陷问题为例,通过合理优化浇注系统,更改局部结构,提高排气能力等方面提出解决思路,最终将气缸体的气孔缺陷率降至较低水平。     

Li influx and binding, and li/mg competition in bovine chromaffin cell suspensions as studied by li NMR and fluorescence spectroscopy

Li(+) influx by bovine chromaffin cells, obtained from bovine adrenal medulla, was studied in intact cell suspensions using (7)Li NMR spectroscopy with the shift reagent [Tm(HDOTP)](4-). The influx rate constants, k(i), were determined in the absence and in the presence of two Na(+) membrane transport inhibitors. The values obtained indicate that both voltage sensitive Na(+) channels and (Na(+)/K(+))-ATPase play an important role in Li(+) uptake by these cells. (7)Li NMR T(1) and T(2) relaxation times for intracellular Li(+) in bovine chromaffin cells provided a T(1)/T(2) ratio of 305, showing that Li(+) is highly, immobilized due to strong binding to intracellular structures. Using fluorescence spectroscopy and the Mg(2+) fluorescent probe, furaptra, the free intracellular Mg(2+) concentration in the bovine chromaffin cells incubated with 15 mM LiCl was found to increase by about mM after the intracellular Li(+) concentration reached a steady state. Therefore, once inside the cell, Li(+) is able to displace Mg(2+) from its binding sites.     

焊接方法优化设计系统的研究

在分析专家系统应用于焊接领域的基础上,根据焊接工艺设计的原理及通常焊接方法的选择原则,研究了焊接工艺设计的特点,提出了系统的设计思想,确定了系统总体框架及模块功能,利用VB实现了建立焊接方法优化设计的系统．采用本系统可以提高焊接工艺人员编制WPS的效率,为生产企业节省资金、缩短技术准备周期,解脱技术人员的繁重劳动,采用该焊接方法优化设计系统还可以增强企业的竞争力．     

考虑风力发电的电力系统小干扰稳定性分析

建立了适合小干扰稳定分析的风力发电机组的数学模型,用于研究含风电电力系统的小干扰稳定性,推导了考虑同步发电机励磁调节系统动态行为的全系统状态矩阵公式。利用特征值分析法,分析系统的小干扰稳定性。通过算例分析,表明风电场接入系统时,对系统中同步发电机强相关振荡模式的频率影响不大,但当风电出力增加时,相关振荡模式的阻尼增强,有利于系统小干扰稳定性。风电场接入受电端区域时,区域间振荡模式阻尼特性相对差一些,更容易发生振荡。