关于为一组点定中心的问题

作者考虑如下的为一组点定中心的问题：设ｘ１，．．．，ｘｍ是平面上的一组点，需要求得一个点ｘ，使得诸ｘｉ与ｘ的距离的偏差最小，今年对偏差的不同的度量方法，问题可归结为不同的最优化问题。本文分析了三个这样的问题，它们分别可表示为线性ｍｉｎ ｍａｘ问题和ｄ．ｃ．规划问题，文中还讨论了可能的求解这些问题的数值方法。     

热传导方程反问题的存在性（Ⅱ）

讨论了下述热传导方程Ｕ－△μ＋ｑ（ｘ）μ＝ｆ（ｘ，ｔ）ｕ（ｘ，０）＝０其中ｑ（Ｘ）＞０为未知函数，在附加条件μ（ｘ，Ｔ）＝ｈ（ｘ）下反问题（μ，ｑ）的存在性。用Ｇａｌｅｒｋｉｎ逼近方法和拓扑度理论得出了反问题的存在性定理。     

C语言源程序汉字处理

本文在找出汉字区位码地址码转换关系的基础上，阐述了用Ｃ语言开发的，在西方图形方式下能显示一、二级汉字库中所有汉字的处理软件的设计考虑，并给出有关程序。     

旅行商问题（TSP）的模拟退火求解

提出了循环排序中６种不同的随机抽样方式，对旅行商问题（ＴＳＰ）的模拟退火求解进行了进一步深入研究．理论分析证明，６种抽样方式均满足模拟退火算法的全局收敛性条件．实例计算表明，子排列反序并移位抽样方式的求解寻优效率最高，且明显优于目前公认最好的著名的Ｓ．Ｌｉｎ“２－交换”抽样方法．本研究和结论对循环排序类优化问题及其求解具有普遍意义．     

PROLOG抽象分析及在并行性分析中的应用

深入研究了Ｐｒｏｌｏｇ抽象分析，并将其应用到Ｐｒｏｌｏｇ的并行化编译开发中．用这一技术开发出的模型是采用动静态结合的方式，它改进了ＤｅＧｒｏｏｔ算法，在一定程度上避免了并行性的损失。这是一种动态开销小，并行性程度高，无需增加用户负担的新方法，利用Ｑｕｉｎ－ｔｕｓＰｒｏｌｏｇ在Ｓｕｎ３／２６０上实现了一开发逻辑程序中与并行性的静态预编译系统。     

奥氏体不锈钢在高温变形过程中的动态再结晶

本文利用热扭转试验方法研究了奥氏体不锈钢的高温变形行为,采用迭加方法,导出了动态再结晶临界应变与峰值应变的关系,并得到了实验的验证.     

容积—节流联合调速系统性能分析

本文以流体力学、控制理论为基础,对限压式变量泵与调速阀组成的调速系统的工作原理、静动态性能进行了较全面的理论分析,并对系统的设计、调整等问题作了有益的探讨,为容积—节流联合调速系统的推广使用提供理论基础。     

Effect of matrix metallo-proteinase-26 (MMP-26) during embryo implantation in the mouse

Matrix metalloproteinase-26 (MMP-26, endometase and matrilysin-2), a novel member of the MMPs family, is detected not only in the placenta and uterus, but is widely expressed in malignant tumors from different sources as well as in diverse tumor cell lines. However, the function of MMP-26 in the reproductive system has never been reported. Expression of MMP-26 in mouse embryos and the function of the MMP-26 antibody during mouse embryo implantation was examined for the first time by injecting the uterine horn, immunohistochemistry,in situ hybridization, co-culture of mouse blastocysts and uterine monolayer epithelial cells, Western blot, RT-PCR, Northern blot and zymography. Our results show that there is strong expression of MMP-26 mRNA and protein in the mouse embryo. Furthermore, the MMP-26 antibody dramatically inhibited mouse embryo implantation and significantly inhibited adhesion and outgrowth of mouse blastocysts onin vitro uterine monolayer epithelial cells. At the same time, the MMP-26 antibody inhibited the expression of integrin αV mRNA and protein in a dose-dependent manner. These data suggest that MMP-26 may play a role in some of the tissue-remodeling events associated with the invasion of the endometrium by trophoblast cells and facilitate successfully embryo implantation.     

Implementation of GPR Signals De-Noising Based on DSP

An important issue of ground-penetrating radar （GPR） signals analysis is de-noising thai is the guarantee of acquiring good detecting effect. The paper illustrates a successful application of digital single processor （DSP） based on wavelet shrinkage algorithm. In order to realize real-time GPP, signals analysis, some key issues are discussed such as the realization of fast wavelet transformation, the selection of CPU chip and the optimization of data movement. Experimenial results show that the DSP based application not only basically meets the real-time requirement of GPP, signals analysis, but also assures the quality of the GPR signals analysis.     

Carbon isotopic record of foraminifers in surface sediments from the South China Sea and its significance

Since the 1990s, the papers and data involved withthe South China Sea (SCS) have been emerging in largenumbers in the world as people pay more attention to thepaleoceanography of the SCS. There have been more than100 cores mentioned in papers containing p…