市场潜量预测方法初探

主要分析当企业在生产经营过程中，面临着开发一种新产品或扩展新的市场区域时，如何对其市场潜景量作出科学的预测而提出了一种有效且实用的参数ｎ的确定方法。     

奇n阶幻立方和正交拉丁立方的构造

在奇 n阶幻方构造研究的基础上 ,发现了奇 n阶幻立方和正交拉丁立方的构造方法。阐明了奇 n阶幻方、幻立方及正交拉丁立方构造的基本思路。介绍了奇 n阶幻立方及正交拉丁立方的构造过程     

移动对象位置的索引技术

在一维空间上采用B^n树索引结构、对移动对象位置进行索引，给出了该方案的实验结果，结果表明，对象的分类处理可以减少系统开销，提高移动查询结果的传输效率，并且可以扩展到特定的二维空间上。     

Effect of acute administration of Δ1-tetrahydrocannabinol on β-endorphin levels in plasma and brain tissue of the rat

Summary Acute treatment with ¹-tetrahydrocannabinol (¹-THC) elevated the concentration of -endorphin-like immunoreactivity (-ELIR) in plasma and in the hypothalamus, but not in the hippocampus of rats habituated to the injection procedure. These effects were not obtained with the psychotropically inert analog of (¹-THC), cannabidiol. In animals that had not been habituated to the injection procedure, placebo treatment induced a decrease in hippocampal -ELIR.The authors acknowledge the skillful technical assistance of Mrs Willeke Logtenberg.     

Inhibition of cadmium teratogenesis by a mercaptoacrylic acid (MFA)

Summary The teratogenic effect of cadmium can be diminished by a number of mechanisms including zinc and pretreatment with cadmium and mercury. In this study, the oral administration of -mercapto--(2-furyl)-acrylic acid (MFA) protects against cadmium-induced malformations and embryonic death. This protection is probably mediated by the chelation of the cadmium ion rather than metallothioneim (MT) synthesis.This project has been financed in part with Federal funds from the U.S. Environmental Protection Agency under grant number R811078. The contents do not necessarily reflect the views and policies of the Environmental Protection Agency nor does mention of trade names or commercial products constitute endorsement of recommendation for use.We thank Dr W. Layton for the statistical analyses of the data and G. McClain for the synthesis of MFA.     

A Threshold Scheme under Peer-to-Peer Network

Resource sharing among peers is one of important application in Peer-to-Peer（P2P） network. Inexistenee of server makes P2P network to be a less trustable tool for property owners to distribute their resource. In order to protect intelligent property, reputation management strategy is adopted in many P2P network. As long as a P2P network reputation strategy is confirmed, application designer can employ a special detailed distribution scheme to fulfill content distribution within the net. Shmir （k, n） threshold scheme, for example, is an encryption scheme to enhance the distribution se curity of this kind of design. （k＊, n） threshold scheme is a new tool similar to Shmir scheme is proposed in this paper. The new scheme based on polynomial expansion and its security is decided by the one way function used in the secret distribution procedure. The scheme efficiency and its features as well as comparison between new and Shmir scheme are also discussed in this paper.     

螺旋伞齿轮渗碳淬火的变形研究

针对螺旋伞齿轮在渗碳淬火时极易发生平面翘曲变形和内孔椭圆化变形的问题，通过对工艺试验结果的分析和研究，得出了通过采取一对螺伞背靠背、加补偿片、螺钉对称紧固等措施，可以有效地减少螺伞的热处理变形的结论。     

固体超强酸催化合成马来酸二丁酯的研究

研究了以SO2-4/TiO2固体酸为催化剂,马来酸酐和正丁醇为原料合成马来酸二丁酯,讨论了其影响因素.结果表明,SO2-4/TiO2固体酸催化剂用量为反应物总量2.4%,醇酸摩尔比4、回流状态下反应1.5 h,此条件下酯化率达98.96%,且催化剂性能稳定可重复使用.     

MenCH3-nO-溶剂化自由能和MenCH3-nOH(n=0,1,2,3)在水溶液中酸性次序翻转的理论研究:离散-连续组合模型

采用离散-连续组合模型计算了MenCH3-nOH(n=0，1，2，3)在水溶液中的溶剂化自由能．结果表明．采用离散-连续组合模型计算的溶剂化能正确反映出了甲醇类在水溶液中的酸性次序，尽管存在较大的误差．但其同样表现为-整体的偏差．此外基于离散-连续组合模型可以发现,溶剂效应短程作用和长程作用对甲醇类由气态到水溶液中次序变化均起着重要作用。