棱体成形车刀CAD系统设计与研究

采用了AutoCAD的嵌入式开发语言AutoLISP，以AutoCAD2002forWindows为开发平台，研制开发了棱体成形车刀参数化CAD系统，设计了各功能子模块，完成了图形用户界面设计、参数计算程序设计，建立了自定义函数库、数据管理系统和图形系统。该系统能够准确、快捷地完成棱体成形车刀的设计计算并生成工程图。     

专用电火花磨削机床数控系统的设计与研究

介绍了金刚石木工刀具专用电火花磨削设备的机械结构和控制系统,并主要研究了数控系统电火花磨削参数优化模块的构成。     

一种基于DSP结构的电解质分析仪的设计与实现

针对电解质分析的特点，提出一种智能仪器的新型实用方案设计。介绍了基于DSP为核心的电解质分析仪器的系统设计思想，阐述了实时测量的实现方法。这种分析仪器可批量、连续测量多组样品中的离子成分及含量。并能针对具体问题进行参数优化，使得测量的稳定度和精度能够满足使用要求。     

机械系统动力学参数动态测试的频域辨识法

提出了机械系统动力学参数动态测试的频域辨识法。该法的要点为：计算机产生多谐差相激振信号，在该信号激励下机械系统产生与激振信号同周期的振动响应，对激励信号和响应信号作等间隔采样并作快速富里哀变换（ＦＦＴ），获得的频谱代入机械系统的频域动力学方程，再用最小二乘法辨识出各参数。由于富里哀变换将时域内的微分运算转变成频域内的代数运算，从根本上避免了噪声的微分放大作用，并且由于对信号整周期截断时ＦＦＴ具有理想的选频滤波特性，所以该法具有很强的抗干扰性。本文以动力调谐陀螺的挠性接头为例，用仿真计算验证了该法的有效性。     

Parameter extraction of solar panels using the graphical method

ABSTRACT

An effective approach to extract the loss parameters of solar panel is developed and able to accurately represent their electrical behaviour. This method allows extracting the parameters of the single-diode model using only the information provided by the manufacturer's datasheet with a low-cost parameter determination technique and no complexity. The complete equation of the single- diode model of solar cells and panels is used, where the number of parameters to be calculated is reduced only to two parameters by a transcendental equation exclusively connecting the series resistance and the diode current, which is solved using the graphical method. The accuracy of the presented approach is justified by experimental data. In addition, the results of the proposed procedure are compared to the most recent proposed techniques in the literature. Furthermore, the results show a highly accurate; in particular, at the maximum power point, the error is still much less than 0.01%.     

Modelling of tumour growth and cytotoxic effect of docetaxel in xenografts

One of the major sources of information on physiological and pathophysiological effects in pre-clinical oncology studies is the xenografted tumour animal model. However, measurement of tumour volume over time potentially masks a range of biological changes that the xenograft is undergoing. In this paper a mechanistic model of tumour growth in xenografts is presented that can be used to investigate the mode of drug action with respect to phenotypic changes. The model encapsulates key histological biomarkers and spatial constraints. The unknown model parameters are first shown to be uniquely identifiable from the proposed experimental studies, and then estimated from the resulting data using the anti-cancer agent docetaxel.     

运载火箭吹除气体加温控制方式

介绍盘管式换热器的控制方式,并针对控制方式提出数字式功率控制器、温控仪的控制模式及参数设置方法。经使用验证表明,该控制设置方案可以提高温度控制精度及效率。     

变频器瞬时停电再起动保护功能的设置

变频器本身具有多种保护功能。实际应用中,出现掉电时间很短又恢复供电的情况,如何设置变频器瞬时停电再起动功能？文章以富士变频器参数设置为例,总结了变频器实际应用中的普遍情况——主要分为两类,一类是设置为保护功能型,另一类是设置为再起动型;同时,每一类根据实际应用情况设置为不同的具体功能。     

单层原油配比实验图版及其在混采井中的应用

根据原油组成和物性等的差别测定混采井产液剖面由来已久。前苏联鞑靼石油科学研究院根据不同原油相混合后的吸光系数具有加和性的特点，在鞑靼各油矿进行了光电比色法研究^[1]。雪弗龙石油公司经过近20年研究，首次应用气相色谱指纹法^[2,3]，研究产液剖面，并证明了此法对油井动态监测的可行性。     

Modeling optimal release policy under fuzzy paradigm in imperfect debugging environment

ContextIn this study, a software optimal release time with cost-reliability criteria has been discussed in an imperfect debugging environment.ObjectiveThe motive of this study is to model uncertainty involved in estimated parameters of the software reliability growth model (SRGM).MethodInitially the reliability parameters of SRGM are estimated using least square estimation (LSE). Considering the uncertainty involved in the estimated parameters due to human behavior being subjective in nature and the dynamism of the testing environment, the concept of fuzzy set theory is applicable in developing SRGM. Finally, using arithmetic operations on fuzzy numbers, the reliability and total software cost are calculated.ResultsVarious reliability measures have been computed at different levels of uncertainties, and a comparison has been made with the existing results reported in the literature.ConclusionIt is evident from the results that a better prediction of reliability measures, namely, software reliability and total software cost can be made under the fuzzy paradigm.