论"不A不B"的否定意义及其制约因素

"不A不B"是汉语中一种常见的特殊否定结构,可以表达多种否定意义.本文将A、B放在特定的语义场中进行考察,指出"不A不B"的否定意义主要决定于A、B的语义性质,同时,本文根据"主观性"与"主观化"的理论,分析了"主观性"这种语用因素对"不A不B"否定意义的影响.     

二维极化子有效质量与温度的关系

本文计及晶格的原子结构讨论了极化晶体中二维极化子的性质。用二次量子化方法处理晶格振动及其与电子的相互作用,导出了二维极化子的自陷能和有效质量,给出了二维极化子有效质量与温度的关系。     

Performance Analysis and Improvement for Some Linear On-Line Bin-Packing Algorithms

The study on one-dimensional bin packing problem may bring about many important applications such as multiprocessor scheduling, resource allocating, real-world planning and packing. Harmonic algorithms (including H _K, RH, etc.) for bin packing have been famous for their linear-time and on-line properties for a long time. This paper profoundly analyzes the average-case performance of harmonic algorithms for pieces of i.i.d. sizes, provides the average-case performance ratio of H _K under (0,d] (d 1) uniform distribution and the average-case performance ratio of RH under (0,1] uniform distribution. We also finished the discussion of the worst-case performance ratio of RH. Moreover, we propose a new improved version of RH that obtains better worst- and average-case performance ratios.     

一种新的结构简单的大口径全息平面干涉仪

本文提出了一种结构十分简单的大口径全息平面干涉仪,理论与实验证明利用全息图的位相误差补偿作用制成大口径的全息平面干涉仪是完全可行的。     

A tentative discussion on population control in Hangzhou and direction of its development]

Hangzhou is a city noted for its scenic beauty. In recent years, developments in industrial and agricultural production, cultural and educational improvements, and various constructions have made Hangzhou a more modernized city, and its population growth has become more rapid. According to one estimate, the number of childbearing women in 1987 will increase by 61% over the 1978 figure. With the mechanic (mobility) growth rate being higher than the natural growth rate, a large population is moving into Hangzhou each year, and the problem of overpopulation is becoming increasingly serious. The supply of newly built residences cannot match the demand, and the living standard is declining. Cultural and educational establishments, health care, and public facilities are unable to catch up with the speed of the population growth. Problems such as unemployment, traffic congestion, and environmental pollution are becoming more serious. In order to cope with the overall situation, the natural growth rate of the urban population should be controlled, and every married couple should be urged to have only 1 child. Satellite cities should be established and developed to match the city's economic development. Another necessary step is the redistribution of existing factories and industries inside the city and of the city's population so as to reduce pollution and noise. The increased labor population should receive better care in order to increase their productivity. Work in gardening and services should be encouraged in order to ease the pressure of unemployment and increase the tourist income.     

A Parametric Approach for a Nonlinear Discrete Location Problem

A discrete location problem is formulated for the design of a postal service network. The cost objective of this problem includes a nonlinear concave component. A parametric integer programming algorithm is developed to find an approximate solution to the problem. The algorithm reduces the problem into a sequence of p-median problems and deals with the nonlinear cost by a node-replacement scheme. Preliminary computational results are presented.     

可重构干扰对零阵列处理实验系统

讨论一个用于干扰对零的阵列处理实验系统。该系统由调度器、子处理器及测试环境组成，通过软件设置可改变系统的拓扑结构；给出了一种基于ＱＲ分解最小二乘理论的适于全自适应阵结构的自适应干扰对零算法。算法实现时将Ｓｙｓｔｏｌｉｃ映射成线性处理结构方式。文中还给出了实验结果。     

金融市场竞争、政府干预与僵尸企业

基于识别出的僵尸企业，探究金融市场竞争和经济上分权而治的地方政府对僵尸企业形成的影响，可以发现，地方政府对经济的干预动机越强，当地国有企业成为僵尸企业的可能性越高；地区金融市场竞争水平的提高能显著降低企业成为僵尸的可能，但地方政府对金融资源的汲取显著削弱了金融市场竞争的有益作用，间接催生了僵尸企业。因此，打破政府、银行、企业间的共生关系,促进金融业内外开放和金融脱媒，推进僵尸企业去杠杆和分类处置等是化解僵尸企业困境的关键，而构建诸如基于包容性财富等的可持续增长考核指标，引导地方政府摒弃以恶化资源配置为代价的做法，则是铲除僵尸企业形成土壤的制度保障。     

创新信息披露、融资约束与企业创新

在我国资本市场制度不完善的背景下,创新信息披露已成为缓解内外部信息不对称的重要途径。基于这一背景,文章选取2015—2019年创业板470家上市公司的数据,基于信息不对称理论和信号传递理论,探讨了创新信息披露对企业创新的影响以及融资约束的中介传导作用。结果发现,创新信息披露对企业创新存在显著的促进作用,且融资约束在这一影响关系中发挥了显著的中介传导作用,高水平的创新信息披露能够缓解企业面临的融资约束,进而通过发挥资本对创新的支持作用促进企业创新。异质性分析发现,这一中介机制在创新优势信息中成立,而在创新风险信息中不成立;针对实质性创新成立,而针对策略性创新不成立。基于以上研究结论,文章提出了相应对策建议。     

理工科大学生科技创新能力培养的探索与实践——以物理实践平台的创建和实施为例

大学生创新意识、创新精神和创新能力的培养是储备创新人才、实施科技创新的重要环节。分析了传统理工科物理教育方式在大学生科技创新能力培养方面的不足,结合长期的理工科物理教学经验,在上海理工大学进行了以理工科物理教育为基础的实践教学改革。通过物理课外创新制作、物理科研实践计划、物理学术竞赛活动等系列物理实践平台的创建和实施,有力地促进了大学生科技创新能力的培养,构建了具有理工科特色的科技创新人才培养体系。