12 MeV直线感应加速器主开关的优化设计

 介绍了12MeV直线感应加速器主开关的一种优化设计。在保持原有主开关的设计风格和接口结构的条件下，通过优化设计局部结构和调整开关电极尺寸，把主开关的结构电感从63.7nH减小到35nH，使得加速腔的高压脉冲前沿从39.6ns减小到27ns，从而有利于提高12MeV直线感应加速器的性能，验证了优化设计的可行性。     

真空获得与测量实验装置的改进

本文分析了原真空获得与测量实验装置结构上的不足之处．介绍了对原装置所进行的改进工作──主要用于取代感应圈的专用电源的制作。     

Asymmetric exchange of cyclopalladated ligands: A new route to optically active phosphapalladacycles

An asymmetric version of the cyclopalladated ligand exchange reaction was developed. This procedure involves the use of prochiral phosphines in an aprotic medium. A benzylaminate palladacycle bearing the primary amino group and the bulky But substituent at the C* stereo-center serves as a chirality inductor. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2112–2129, December, 2006.     

EFFECT OF ANTIBODIES AGAINST THE GAP JUNCTION PROTEIN ON DIFFERENTIATION OF INDUCED EMBRYONIC CELLS

Microinjections of antibodies against gap junction prorein to early blastomcres of Xenopus laevis were succeeded by the treatments of mesodermal inductor. It was found that induction was not affected by the injection of the antibodies but the differentiation of notochord and muscle was impeded at different degrees. Cell interactions via gap junction communication seem to be involved in the differentiation of the induced cells.     

ON THE UPPER ESTIMATES OF FUNDAMENTAL SOLUTIONS OF PARABOLIC EQUATIONS ON RIEMANNIAN MANIFOLDS

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非局部初值问题解的存在性定理

近来非局部问题的研究日见增多,但涉及带非线性边界条件的初值问题文献 较少.本文目的在于证明一个半线性方程的齐次边值问题和一个非线性边界条件问题 解的存在性.主要使用半群,分数次幂函数空间,广义Poincare算子等工具.     

Velocity-dependent inertial induction—possible explanation for supergravity shift at solar limb

A quantitative model of inertial induction has been earlier proposed by the author which not only results in the exact equivalence of inertial and gravitational masses but also gives rise to an exceedingly small drag dependent on the velocity with respect to the mean rest frame of the universe. This leads to a cosmological redshift in close agreement with the observation. When this velocity drag due to local interaction is considered it is seen that a significant proportion of the secular retardation of the earth’s spin and the moon’s orbital motion can be attributed to this drag. This also resolves the problem of the moon’s close approach to the earth in the past as suggested by a purely tidal friction theory. The observed large secular acceleration of the Phobos is also explained. The present article shows that local interaction also yields a redshift. When applied to the solar radiation it is seen that the observed supergravity shift at the limb can be very satisfactorily explained.     

Risk evaluation and protection against ionizing radiation

The advent of nuclear reactors ushered in an era of increasing number of sources of ionizing radiations. However, the potential of ionizing radiations to cause harmful effects was recognized soon after the discovery of x-rays and radioactivityi.e. long before the building of nuclear reactors. Therefore, protection against ionizing radiations has been of paramount concern and has guided the development of atomic energy and related fields. The advances in technology in general resulted in an increase in accidents causing injury and death. It was realised that even medicines, food additives and a host of other substances of daily use had injurious side effects. Smoking was found to be extremely harmful. From these emerged the concepts of quantitative and relative risks. This article discusses briefly the concept of riskvis-a-vis ionizing radiations and approaches to protection against them.     

Experimental observation of the B(3) field: A reply to Raja et alia

The recent claims by Rajaet al. [1,2] are corrected in this reply. It is shown that there is no Faraday induction due toB ⁽³⁾in vacuo, as observed by these authors. The observation of the inverse Faraday effect by these authors is an observation of theB ⁽³⁾field at second order. Their data, correctly interpreted, constitute strong support for the existence and predicted properties of theB ⁽³⁾field.     

完全耦合的正倒向随机微分方程及相应的偏微分方程系统

本文利用完全耦合的正倒向随机微分方程,对一类耦合了一个代数方程的二阶拟线性抛物型偏微分方程系统,给出概率表示。在适当的假设下,得到这类偏微分方程系统粘性解的存在唯一性结果。