项目经理考核的模糊综合评判法

本运用模糊数学的理论，对项目经理素质进行分类，设置权重，并采用模糊综合评判法对项目经理的表现做出综合评判，力求提出一种比较科学完善的，可以定量分析的考核方法。     

基于熵的科技投融资的绩效评价

基于熵的评价机理，评价分析我国近几年来的科技投融资政策绩效。分析结果：①科技投融资绩效具有显的持续性；②1998—2000年我国科技投融资绩效在逐年提高。     

作战方案评估智能决策支持系统研究

作战决策是作战指挥的核心，作战指挥智能决策支持系统（IDSS）是用于辅助指挥员进行作战决策的计算机软件。它是指挥自动化的重要组成部分。本通过研究作战方案评估IDSS，探讨了作战指挥IDSS的结构及功能。     

Impact of Bursty Traffic on Queues

The impact of bursty traffic on queues is investigated in this paper. We consider a discrete-time single server queue with an infinite storage room, that releases customers at the constant rate of c customers/slot. The queue is fed by an M/G/∞ process. The M/G/∞ process can be seen as a process resulting from the superposition of infinitely many ‘sessions’: sessions become active according to a Poisson process; a station stays active for a random time, with probability distribution G, after which it becomes inactive. The number of customers entering the queue in the time-interval [t, t + 1) is then defined as the number of active sessions at time t (t = 0,1, ...) or, equivalently, as the number of busy servers at time t in an M/G/∞ queue, thereby explaining the terminology. The M/G/∞ process enjoys several attractive features: First, it can display various forms of dependencies, the extent of which being governed by the service time distribution G. The heavier the tail of G, the more bursty the M/G/∞ process. Second, this process arises naturally in teletraffic as the limiting case for the aggregation of on/off sources [27]. Third, it has been shown to be a good model for various types of network traffic, including telnet/ftp connections [37] and variable-bit-rate (VBR) video traffic [24]. Last but not least, it is amenable to queueing analysis due to its very strong structural properties. In this paper, we compute an asymptotic lower bound for the tail distribution of the queue length. This bound suggests that the queueing delays will dramatically increase as the burstiness of the M/G/∞ input process increases. More specifically, if the tail of G is heavy, implying a bursty input process, then the tail of the queue length will also be heavy. This result is in sharp contrast with the exponential decay rate of the tail distribution of the queue length in presence of ‘non-bursty’ traffic (e.g. Poisson-like traffic). This revised version was published online in August 2006 with corrections to the Cover Date.     

线性加权评价与聚类分析理论及应用

针对当前大学生综合素质评价方法的弊端进行简单的探讨，提出了线性加权法和聚类分析法两种评价方法，并通过实例说明这两种方法的可行性，得到的结果也符合实际情况．     

Improved quality evaluation of Radix Salvia miltiorrhiza through simultaneous quantification of seven major active components by high-performance liquid chromatography and principal component analysis

A novel method, using high-performance liquid chromatography combined with principal component analysis, was developed for the quality evaluation of danshen through simultaneous determination of seven components, namely danshensu, protocatechuic acid, protocatechuic aldehyde, salvianolic acid B, tanshinone I, cryptotanshinone and tanshinone IIA. These seven components were simultaneously separated on a Zorbax SB-C(18) column. The mobile phase consisted of 0.05% phosphoric acid water and methanol:acetonitrile (1:1) with a gradient elution, and the detection wavelength was set at 280 nm. Thirty samples of danshen and its substitutes from different sources were investigated by the established method. The results showed that the content of each analyte varied considerably in different danshen samples. Among the seven components tested, salvianolic acid B, tanshinone IIA, cryptotanshinone, tanshinone I, danshensu and protocatechuic aldehyde were proved suitable and representative as chemical markers for the quality control of danshen except for protocatechuic acid. Moreover, principal component analysis was used for the similarity evaluation of different samples, and it could be straightforward and reliable to differentiate danshen samples of different origins. In conclusion, simultaneous quantification of multiple components by high-performance liquid chromatography combined with principal component analysis would be a better strategy for the quality evaluation of danshen.     

基于图像质量评价的手术机器人系统磁共振兼容性分析方法

为保证手术安全及操作精度,基于磁共振图像导航的手术机器人系统需具备磁共振设备兼容性. 针对这一问题,本文提出了基于磁共振图像质量评价的手术机器人系统磁共振设备兼容性分析方法,扩展了图像数据集,并结合图像信噪比、图像变化因数、磁共振图像畸变量等评价参数,逐一分析机器人系统组件通电、机器人系统运动对磁共振图像质量产生的影响,建立图像质量评价依据. 实验结果表明,该质量评价方法可充分分析手术机器人及其系统组件的磁共振兼容性,且可为医疗手术机器人系统组件的磁共振兼容性分析提供测试方法与理论依据.     

Identifying minimal and dominant solutions for Kummer recursions

We identify minimal and dominant solutions of three-term recurrence relations for the confluent hypergeometric functions and , where (not both equal to 0). The results are obtained by applying Perron's theorem, together with uniform asymptotic estimates derived by T. M. Dunster for Whittaker functions with large parameter values. The approximations are valid for complex values of , and , with .

     

基于微流控技术平台的Pt基三元电催化剂高通量合成和筛选（英文）

高性能铂基电催化剂的高效合成和筛选对于加速其在各个领域的进一步发展和应用具有重要意义。微流控高通量技术在铂基电催化剂的合成参数优化应用方面具有巨大的潜力。然而,缺少性能评估的微流控高通量合成无法最大限度地发挥其优势。在这项工作中,我们构建了将材料的高通量合成与高通量筛选相结合的多功能平台。该平台的微流控芯片可以生成三种不同前驱体金属离子的20级浓度梯度。微反应器阵列具有100个微通道,用于材料合成和电化学表征。利用该平台我们合成了5组铂基三元电催化剂(共计100种不同的组分),并进行了电化学表征,直接确定了Pt基三元电催化剂对析氧反应的最佳组成。这表明我们所构建微流控高通量平台具有高效性和灵活性,可大大缩短了新材料开发和材料性能优化的周期。     

信宜市教育城幼儿园幼儿微量元素营养评估及分析

为了对信宜市教育城幼儿园幼儿微量元素营养进行评估,共采集了教育城幼儿园幼儿239例头发,其中男165例,女74例,用电感耦合等离子体发射光谱法测定头发中的钙、锌、铁、铜、锰和铅的含量,其结果分别为：钙584．844-178．76μg/g,锌178．10±83．38μg/g,铁61．67±17．49μg／g,铜14．03±8．92μg／g,锰2．86±1．73μg／g,铅7．13±2．83μg／g。按照世界卫生组织的四级评估标准进行评估,钙、锌和锰等元素没有发现中度以上的营养缺乏现象,其中铁只有0．4％重度营养缺乏,铜只有8．0％中度营养缺乏,有害元素铅没有发现中度以上超标现象。比对结果,信宜市教育城幼儿园幼儿微量元素营养水平,远优于当地及周边城市的幼儿园幼儿。幼儿园幼儿微量元素营养是否均衡,应作为幼儿园总体评估指标之一。