NECESSARY AND SUFFICIENT CONDITION FOR GLOBAL CONTROLLABILITY OF A CLASS OF AFFINE NONLINEAR SYSTEMS

In this paper, we investigate the global controllability of a class of n-dimensional affine nonlinear systems with n- 1 controls and constant control matrix. A necessary and sufficient condition for its global controllability has been obtained by using the methods recently developed. Furthermore, we generalize the above result to a class of affine nonlinear systems with a block-triangular-like structure. Finally, we will give three examples to show the applications of our results.     

On functional decomposition of multivariate polynomials with differentiation and homogenization

This paper gives a theoretical analysis for the algorithms to compute functional decomposition for multivariate polynomials based on differentiation and homogenization which were proposed by Ye,Dai,and Lam(1999) and were developed by Faugere,Perret(2006,2008,2009).The authors show that a degree proper functional decomposition for a set of randomly decomposable quartic homogenous polynomials can be computed using the algorithm with high probability.This solves a conjecture proposed by Ye,Dai,and Lam(1999).The authors also propose a conjecture which asserts that the decomposition for a set of polynomials can be computed from that of its homogenization and show that the conjecture is valid with high probability for quartic polynomials.Finally,the authors prove that the right decomposition factors for a set of polynomials can be computed from its right decomposition factor space.     

不同融合条件及激活方法对体细胞克隆绵羊胚胎发育的影响

对成年绵羊耳部皮肤细胞进行培养传代，将培养出的成纤维细胞经血清饥饿法处理后，作为核供体移植到MII期去核卵母细胞中进行核移植胚胎的生产，用细胞驰素B法与离子霉素＋6－DMAP法对核移植胚胎（重构胚）在电融合后进行化学激活，然后在38.6度，5％CO2，最大相对湿度条件下，进行体外培养（IVC），重构胚卵裂率分别为37．8％与43．8％（51／135与81／185），囊／桑葚胚率分别为9．8％和12．3％（5／51和10／81），在融合电压1．5kV/cm，持续时间30us，脉冲次数为2次的条件下，孤雌激活胚胎的卵裂率和囊／桑葚胚率分别为81．0％和12．9％。     

胃酸新药莱敏拉唑中间体的合成

以甲苯为原料，通过硝化、还原、酰化、甲基化合成了莱敏拉唑中间体２－甲基－Ｎ－甲基－Ｎ－（２－甲基苯基）－丙酰胺。     

浮力是否保守力

本文就浮力是否是保守力的问题进行了讨论。     

高磺化度SEPDM的制备及离聚体性能研究

研究了磺化度大于０．５ｍｏｌ／ｋｇ的磺化三元乙丙橡胶的制备及离聚体的加工和力学性能，讨论了磺化反应的影响因素，得到了优化的横化反应条件：ｎ（乙酸酐）：ｎ（浓硫酸）＝１：１，５℃下反应３０ｍｉｎ。硬脂酸锌是高磺化度ＳＰＤＭＺｎ离聚体的有效增塑剂，其质量分数为１０％－３０％时，可显著改善离聚体的加工性能。     

MULTIPLE CRITERIA DECISION MAKING： DISCORDANT PREFERENCES AND PROBLEM DESCRIPTION

There are many practical decision problems where decision makers＇ preferences may be inconsistent and contradictory. In this paper, new methods for ordering and classifying multi-attribute objects by discordant collective preferences are suggested. These methods are based on the theory of multiset metric spaces. The proposed techniques are applied to ranking companies and a competitive selection of projects, which are estimated by several experts upon multiple qualitative criteria.     

An approximate analytical solution to the ultrafiltration profile in a hemodialysis process between parallel porous plates

In a hemodialysis process, the blood that runs through straight channels exchanges substances with the dialysate through a semi-permeable membrane. The waste products, such as urea and creatinine, are therefore removed from the plasma by the membrane. In the analysis of this process, determination of the ultra-filtration profile along the porous membrane surface remains a difficult problem. In this work, an analytical solution to the derivation of such a profile was detailed, and the feasibility of this solution was discussed. The ultra-filtration profile was found to be in a cosine shape.     

A Contact and Non-Contact Hybrid Profilometer with Large Range

A novel hybrid instrument of contact and non-contact measurement with large range is developed, and both measurement systems are based on a Linnik interference microscope and on white-light interference measuring techniques. The ambiguity presented in conventional monochromatic interferometers is not present in the contact and non-contact measurement, and they have a virtually unlimited unambiguous range. For the contact measurement, the vertical measuring range is ±5 mm with a resolution of 1 nm and the horizontal measuring range is ±25 mm in x-range and y-range with a resolution of 1.25 μm; for the non-contact measurement, the vertical measuring range is ~5 mm with a resolution of 1 nm and the horizontal resolution better than 0.5 urn.     

On the Hejek-Renyi Inequality

In this paper we give an elementary and unified proof of the Hajek-Renyi inequality, and get a general version of this inequality which not only covers the all known results but also derives some new results.