双向模糊综合评判模型及应用

目的解决贸易谈判中的价格评估,寻找双方都能接受的价格区间。方法根据实际问题,建立一个商业谈判中双向模糊综合评判模型,并运用这个模型解决了服装谈判中买卖双方初步讨价还价的双向模糊综合评判问题。结果建立起了谈判模型,并利用模型分析了服装谈判。结论这个模型是可行的,并符合双方预期。     

大豆害虫的研究概况

根据近年来国内外对大豆害虫的研究现状，从大豆害虫种类、主要害虫的生物学及生态学特征、预测预报、种群结构变化及综合防治5个方面，对大豆害虫的研究概况进行综述，并对未来的发展趋势加以展望。     

超支化聚合物制备方法的研究进展

超支化聚合物是一类可以通过一步法来合成的具有高度支化结构的体型大分子.经过二十年的研究,超支化聚合物由于其独特的结构和性能特点以及可实现规模化生产的特点, 已经迅速成为一类重要的和具有广阔应用潜力的高分子材料.本文从单体类型的角度介绍了超支化聚合物的主要制备方法及其发展历程,主要涉及ABx型,AB*型,A2 B3型以及潜在ABx型单体(包括开环聚合和偶合单体法)等,同时论述了各制备方法的优点和局限性 .     

Heuristic Backtrack Algorithm for Structural Match and Its Applications

The concept WALKING on structures is proposed, and the partial ordering between a structure and a query structure (substructure) is also created by means of WALKING. Based upon the above concepts, authors create the Heuristic-Backtracking Algorithm (HBA) of structural match with high performance. In the last part of the paper, the applications of HBA in molecular graphics, synthetic planning, spectrum simulation , the representation and recognition of general structures are discussed.     

合成氨工业废水生化处理试验研究

本文提出了以活性污泥法处理合成氨工业废水的方法。通过小型动态试验,取得了大量试验数据,在此基础上得出了最佳运行条件和处理系统的设计参数,并对生产废水与生活污水的混合处理进行了初步试验。经本法处理后,废水中COD去除率在85%以上,BOD_5去除率可达90%以上,均能达到国家规定的排放标准。     

ANALYSIS OF WAVEFORM ERRORS IN MILLIMETER-WAVE LFMCW SYNTHETIC APERTURE RADAR

In remote sensing applications, there is a special interest in the lightweight, cost effective, and high resolution imaging sensors. The combination of linearly frequency modulated continuous wave (LFMCW) technology and synthetic aperture radar (SAR) technique can lead to such a sensor. This paper concentrates on the analysis of waveform errors in millimeter-wave (MMW) LFMCW SAR. The generating scheme of millimeter-wave LFMCW waveforms with phase locked loop (PLL) and direct digital synthesizer (DDS) combined frequency synthesizer is investigated. The impacts of quantization errors, spurs, and frequency nonlinearities are analyzed. Simulation results show that the quality of LFMCW waveforms has a direct influence on the SAR images. Hence a scheme of frequency synthesizer to achieve high performance MMW LFMCW waveform is proposed. This synthesizer driven by a DDS array can adaptive suppress the spurious level without degradation of excellent frequency linearity and fast switching speed.     

Microbial Asymmetric Catalysis—Enantioselective Reduction of Ketones [New Synthetic Methods (45)]

Microbial asymmetric reduction of ketones is a method widely used for the preparation of chiral alcohols. The present progress report deals with the basic concepts that govern enantioselectivity of enzymes and intact cells. Strategies to control the stereochemical course of microbial reductions of carbonyl compounds and the relationship of substrate structure to enantioselectivity are considered.     

失效率的综合E-Bayes估计

该文提出了可靠性参数的一种新估计方法综合E-Bayes估计法.在无失效数据情形下给出了失效率的E-Bayes估计的定义,并给出了失效率的E-Bayes估计。在引进失效信息后，给出了失效率的E-Bayes估计，并在此基础上给出了失效率和其它参数的综合E-Bayes估计。最后，结合实际问题进行计算，结果表明该文提出的方法可行且便于应用。     

城市工业企业经济效益的综合评判

本文采用多元统计分析中的主成分分析方法改进型，对城市工业企业的经济效益给予综合评判，然后又对综合评判系数采用系统聚类分析方法对其作了分类，用以找出各类城市的优势和差距，便于针对性地制定提高经济效益的对策．     

删失场合半参数回归模型的二阶段估计

对于半参数回归模型ｙｉ＝ｘ′ｉβ＋ｇ（ｔｉ）＋ｅｉ，１≤ｉ≤ｎ，ｇ为Ｒ１上未知函数，β为ｐ×１维待估参数向量．本文考虑当ｙｉ被随机删失时β和ｇ的估计．基于模型的可加性，利用综合数据法得到β的二阶段估计β～＊ｎ和ｇ的估计ｇ＊ｎ，并证明了它们的强相合性．