离散变量桁架结构拓扑优化设计的混合算法

将相对差商法和混沌优化结合起来,形成求解离散变量桁架结构拓扑优化设计的混合算法。利用相对差商法可以对离散变量快速寻优的特点,及混沌变量的全局遍历性,可以有效地跳出局部最优解,达到拓扑优化全局寻优的目的。通过采用和准最优解的对比及几何稳定性的判断等辅助性技术,降低了重分析次数。同时,高效的重分析方法的结合,提高了求解的效率,也避免了拓扑优化问题中求解的一些困难。算例表明,该算法对于离散变量的拓扑优化设计问题是快速有效的。     

The Flynn Effect and U.S. Policies: The Impact of Rising IQ Scores on American Society Via Mental Retardation Diagnoses.

Over the last century, IQ scores have been steadily rising, a phenomenon dubbed the Flynn effect. Because of the Flynn effect, IQ tests are periodically renormed, making them harder. Given that eligibility for mental retardation (MR) services relies heavily on IQ scores, renormed tests could have a significant impact on MR placements. In longitudinal IQ records from 9 sites around the country, students in the borderline and mild MR range lost an average of 5.6 points when retested on a renormed test and were more likely to be classified MR compared with peers retested on the same test. The magnitude of the effect is large and affects national policies on education, social security, the death penalty, and the military. This paper reports the perceptions of professionals as they relate to IQ score fluctuations in normal, borderline, and/or MR populations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

顺序统计量在小样本检验中的理论和方法研究

本文研究了均匀分布、指数分布和正态分布的顺序统计量的差商序列概率分布。讨论了它们在小样本检验问题中的应用。该理论和方法对武器装备小样本检验具有一定的意义。     

Rejoinder to book review.

Writing Psychology of reading has given John Downing and this writer a great deal of self-doubts and self-criticisms. This is particularly so in a field which is so vast and complex and where there is a high level of productivity. We are thus appreciative of the insightful review of our volume by Linda Siegel (Canadian Psychology, 1985, 26, pp. 300-301, see record 2007-08971-001). We agree with the comments on the "complexities of definitional issues" and the need to amplify on comprehending. This latter endeavour, to misquote Edmund Huey, "would almost be the acme of a psychologist's achievements." Lest Downing and Leong be misunderstood, I would like to clarify one main point raised in the review. We state that "the discredited achievement or learning quotient should be laid to rest" (p. 306). If some psychometric tests must be used, they must meet all the technical requirements. In particular, these screening devices need to be "supplemented by individual diagnosis of children for appropriate educational placement and programming" (p. 306). Elsewhere I have elaborated on this two-tier approach of the more quantitative psychometric assessment followed by the more qualitative cognitive-developmental diagnosis (Leong, 1985, in press). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

单孔稳定流抽水试验计算渗透系数对比研究

在水文地质普查阶段,为了解预查研究区含水层的富水性、地下水类型和渗透系数,以防城港地区那梭镇ZK03号水文地质钻孔作为主要研究对象,根据钻孔水文地质条件和工作条件,采用单孔稳定流抽水试验的方法对那梭ZK03号水文钻孔进行3次降深的抽水试验,根据涌水量、单位涌水量与降深之间的关系曲线图,可以确定该地下水埋藏条件为承压水,容积法可大致确定抽水井出水量约为1.81L/s,为中等富水性。按稳定流计算通过迭代法、水文恢复法对比计算分析可以得出水文恢复法计算的渗透系数值较为合理,更具有可参考价值,为下一步评价含水层特性与地下水资源评价提供依据。     

以企业文化为先导创建优秀团队

本文通过对建立适应性文化价值体系和团队情商的分析，创造性地提出了从企业文化建设入手提升团队情商的路径以及倡导执行力文化，创建学习型团队的目标。文中“对灵商与各种‘商数’关系的设想”在学术上具有独创性并具有广泛的管理实用价值。     

Numerical Solutions to Critical Problem of Reflected Cylindrical Reactor

The multi-region critical problem can be transformed into an eigenvalue problem in the classical sense by using the method of Kuscer & Corngold and of Wing. This transformation is applied to derive a variational formulation for a reflected reactor.

An approximate critical value of the multiplying factor is determined by maximizing the Rayleigh quotient for radially and totally reflected cylindrical reactors. It is shown that this approximate critical value is an upper bound of the true critical value.

From the facts that the operator is self-adjoint and the eigenfunction is positive, an expression is derived for the upper and lower bounds of the true eigenvalue, by making use of the approximate distribution. The difference of the upper and lower bounds is an uncertainty of the presumption of the true critical value. It is found that we can compute the bounds to any required precision.

The narrow bounds are calculated for two radially and one totally reflected cylindrical reactors.     

基于粒计算和序列比对的典型工艺路线发现方法

针对企业工艺设计数据的继承性和重用性问题,提出一种基于粒计算和序列比对的典型工艺路线发现方法。首先采用生物信息学领域的序列比对技术,从整个工序序列的范围比较两条工艺路线,建立其最佳比对,并综合考虑正确匹配的工序数、连续正确匹配工序数和连续空位数来计算其相似度,构建工艺路线的模糊相似矩阵;然后依据粒计算理论模型之一的模糊商空间理论,创建具有分层递阶结构的工艺路线商空间族,通过聚类有效性评价,确定最优工艺信息粒层群;最终从构成不同粒层的工艺信息粒中,根据工艺路线两两最佳比对结果,选取完全一致的工序集作为典型工艺路线。通过应用实例验证了方法的可行性和有效性。     

基于逆向Stirling循环的制冷机中功转化为热的比率

以逆向Stirling循环为原理的理想气体的可逆制冷机中功转化为热的比率为η比率=-Q/W1=T1-T2/T1.在可逆制冷机中,实际气体和理想气体的功温比守恒.可逆过程的功温比是状态函数.文章提出了热力学第二定律的新表述,即不可能通过做功使之完全变为热量而不产生其它影响.可证明实际过程的功温比大于可逆过程的功温比,∫（δW/T）实际过程≥∫（δW/T）可逆过程.     

Fermentation of wheat and triticale hydrolysates: A comparative study

In bioethanol production four wheat varieties were investigated: NS 40S, Renesansa, Rapsodija and Dragana, as well as four triticale varieties: Oganj, Jutro, Odisej and NST 21/06. The samples were grinded and mixed with water under conditions prescribed for bioethanol processing. Liquefaction of wheat samples was conducted at 65 °C and 60 °C for triticale samples. All the investigated samples were prepared with or without the addition of technical enzymes: thermostable α-amylase (Thermamyl SC) and glucoamylase (SAN Super 360 L). After liquefaction and saccharification, the samples were subjected to fermentation with Saccharomyces cerevisiae (dry active instant yeast). After the fermentation step ended, ethanol content was determined, and autoamylolytical quotient was calculated. The following values of autoamylolytical quotient were obtained: 71.79% for variety NS 40S; 72.22% for variety Dragana; 62.15% for variety Rapsodija and 81.46% for variety Renesansa. The obtained results revealed that Renesansa is the most suitable wheat variety for bioethanol production due to the largest amount of its native amylolytical enzymes. The following autoamylolytical quotients were obtained for triticale: 99.30% for variety Oganj; 98.65% for variety Jutro; 99.55% for variety Odisej and 94.24% for variety NST 21/06. The results implied that, in the case of triticale, technical enzymes were not needed for starch degradation. It is possible to conduct preparation of triticale at 60 °C.