20世纪中国女性文学中女性意识的嬗变与发展

20世纪中国女性文学的女性意识经历了五四时期的觉醒期,30年代至70年代的消融期和80至90年代后的发展期。在女性意识的嬗变发展过程中,显示着女性意识由自觉走向自醒,由模糊困顿到明晰多样。从不同阶段女性意识的不同特点中,可以透视出20世纪女性文学在发展过程中所取得的成绩及面临的困惑。     

The crystal-like anatomical uniformity of the striate cortex

The visual field is topographically mapped onto the primary visual cortex (V1), forming a retinotopic map which is far more detailed for the foveal regions than for the periphery. We found that receptive field (RF) size in monkey V1 increases with eccentricity, and that a 1—2 m² V1 region contains roughly a complete set of machinery necessary to analyze a visual-field area whose size is about that of the RFs of the cells. This allows V1 to be anatomically uniform, and is in sharp contrast with the retina.     

Stratifiable Families of Extremals and Sufficient Conditions for Optimality in Optimal Control Problems

It is shown that, if a parametrized fämily of extremals F can be stratified in a way compatible with the flow map generated by F, then those trajectories of the family which realize the minimal values of the cost in F are indeed optimal in comparison with all trajectories which lie in the region R covered by the trajectories of F. It is not assumed that F is a field covering the state space injectively. As illustration, an optimal synthesis is constructed for a system where the flow of extremals exhibits a simple cusp singularity.     

Local automorphisms of operator algebras on Banach spaces

In this paper we extend a result of Semrl stating that every 2-local automorphism of the full operator algebra on a separable infinite dimensional Hilbert space is an automorphism. In fact, besides separable Hilbert spaces, we obtain the same conclusion for the much larger class of Banach spaces with Schauder bases. The proof rests on an analogous statement concerning the 2-local automorphisms of matrix algebras for which we present a short proof. The need to get such a proof was formulated in Semrl's paper.

     

求解非线性规划问题的光滑路径跟踪方法

通过对非线性规划问题的K-T点的光滑路径跟踪方法研究，得出一种针对于既有不等式约束条件又有等式约束条件的优化问题光滑路径跟踪方法，证明了光滑跟踪路径的存在性。     

论文艺与宗教的共同特质

文艺与宗教在原始社会时期是混融在一起的。后来虽然在自己的进一步演化中走着各自不同的道路，但它们之间仍然具有许多共同的特质，主要表现在：1、都用感性直观的方式把握世界；2、都有追求人生哲学、人生终极关怀的目的；3、都属于社会意识形态。     

矩阵的弱相似性及其应用

推广了矩阵环Mn(F)中相似性概念，提出了矩阵的弱相似概念，研究了它的基本性质，获得一些有趣结果，此外，指出了文[3]的一个错误，给出了Laffey-Choi一个关键引理的矩阵式的证明。     

华土题材·西方文本·性别言说

从好莱坞影片《花木兰》入手，结合东西方化语境，对艺作品中常见的“女扮男装”叙事模式及其二重性进行辩证透视，从而肯定性别批评有助于我们超越固有思维定势去发现新的作品世界。     

Study of local lattice relaxation of substitutional impurities in silicon and germanium

Local lattice relaxation of substitutional donors in silicon investigated using self‐consistent multiple scattering Xα (MSXα) method within the framework of the standard muffin‐tin potential approximation is extended to substitutional donors in germanium and substitutional acceptors in both silicon and germanium. Incorporating the effect of lattice relaxation surrounding the impurity makes the model suitable for both shallow and deep levels. Chemical trends of some aspects of impurity states, such as local lattice relaxation and charge transfer, of the impurities both in silicon and germanium are inferred. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004     

小型图书馆文献数据库建设与维护浅议

针对文献数据库在图书馆自动化工作中的作用,阐述了小型图书馆必须坚持以标准化、规范化管理来进行数据库建设与维护,并提出应全面提高数据库建设与维护人员的素质.