光度法同时测定磷和硅的研究

用钼蓝法分别测定磷和硅的含量多有报导［１］［２］［３］，但用该法对其进行同时测定未见报导．本文探讨了用钼蓝法同时测定磷和硅，确定了其测定条件．本法具有简便、快速、不需特殊试剂等特点，可用于水等试样中磷和硅的同时测定．     

The Transport System and Society’s Metabolism in the UK

This paper analyses the interrelation between the transport system and measures of resource consumption such as material and energy consumption over a 60-year period (1937–1997) in the UK. Non-motorized transport and time consumption for mobility are estimated in addition to conventional measures of transport. During the period analyzed, the UK population grew by 20% while transport of goods and persons increased more than threefold and material and energy consumption almost doubled. The transport intensity of domestic material input (DMI) doubled to 300 ton-kilometers (tkm) per ton of DMI while the transport intensity of domestic energy consumption (DEC) doubled to 20 tkm per gigajoule (GJ) of DEC. Thus, while the material and energy intensity of GDP declined significantly, a well-established trend in many advanced countries, the transport intensity of materials and energy consumption rose. These findings suggest a close link between transport, economic development, and long-term structural transformations. In the case of personal transport, a rebound effect was also observed: whereas the average speed of transport has greatly increased, the average number of hours per day devoted to personal transport has not declined.     

灰色动态预测模型在货币供应量预测中的应用

在对金融系统中货币供应量的预测进行相关研究的基础上,介绍了符合金融系统预测规律的灰色系统动态预测法,并根据中国货币供应量的实际数据进行了实证的预测检验。结果显示,这种方法简单,不需要借助于其他任何时间序列数据,需要数据量少,预测精确度高,对于近期预测尤其准确,也可进行中长期预测;实证预测结果也符合我国金融系统中货币供应量预测的实际。     

Optimal estimation of a finite population mean under generalized random permutation models

Employing certain generalized random permutation models and a general class of linear estimators of a finite population mean, it is shown that many of the conventional estimators are “optimal” in the sense of minimum average mean square error. Simple proofs are provided by using a well-known theorem on UMV estimation. The results also cover certain simple response error situations.     

东亚区域经济合作的约束条件及主导力量——“10＋1”合作模式可行性研究

在全球各区域经济合作中,东亚区域经济合作处于制度推进的初级阶段。在东亚合作约束条件序列中,经济整合度和贸易开放约束较小,主导国和主导力量约束次之,政治和文化约束最大。与欧洲和北美区域经济合作不同,东亚文化背景殊异;百年殖民历史伤痛犹新;放弃国家主权疑虑重重,还没有形成能够协调各方利益和促进区域经济合作的稳定制度机制。在内部和外部条件限制下,东亚经济一体化只能通过三个相互割裂的“东盟10 l”机制“迂回”推进,而且在相当长时期合作采取的是自由贸易区方式。     

按"七一"讲话精神加强和改进党的建设

江泽民同志"三个代表"的重要思想,特别是在庆祝建党80周年大会上的重要讲话,为党的建设提出了明确的目标和要求.迎接党的十六大,就要按照这些要求,把党的建设的各项任务真正落到实处.要采取有效措施,加强和改进党的思想理论建设、政治建设、组织建设、作风建设和制度建设.要深入研究党的执政规律和执政方式、党的阶级基础和社会基础、党内民主建设、劳动和劳动价值等问题,力求作出深入、科学的回答.     

Distance graphs on R n with 1-norm

Suppose S is a subset of a metric space X with metric d. For each subset D⊆{d(x,y):x,y∈S,x≠y}, the distance graph G(S,D) is the graph with vertex set S and edge set E(S,D)={xy:x,y∈S,d(x,y)∈D}. The current paper studies distance graphs on the n-space R ₁ ⁿ with 1-norm. In particular, most attention is paid to the subset Z ₁ ⁿ of all lattice points of R ₁ ⁿ . The results obtained include the degrees of vertices, components, and chromatic numbers of these graphs. Dedicated to Professor Frank K. Hwang on the occasion of his 65th birthday. Supported in part by the National Science Council under grant NSC-94-2115-M-002-015. Taida Institue for Mathematical Sciences, National Taiwan University, Taipei 10617, Taiwan. National Center for Theoretical Sciences, Taipei Office.     

利用和声分散搜索算法解决动态共乘的乘客选择研究

动态共乘作为一种配合解决城市交通出行难题的新模式近年来引起了人们越来越多的关注，然而在较大范围内选择合适的乘客，以便获得最佳的综合服务效果却具有相当大的挑战性。本文正是针对这一问题，建立了以乘客效用最大化和司机总行程最短为目标函数，以满足司机与乘客的时间要求和司机参与约束为限制条件的多目标0-1规划共乘模型，用于帮助司机选择最合适的乘客。根据该模型的特点，构造了加入了分散搜索机制的新的和声搜索算法。在仿真实验时，针对司机和乘客效用的两种产生方式，在较大规模的路网环境下利用该算法分别对模型进行了求解，得到了Pareto最优解集。仿真结果不仅表明了模型的合理性和算法的可行性，而且还指出基于效用函数可以发现更多合适的潜在乘客。最后，通过与文献中其它算法的对比进一步展示了本文算法的有效性。     

Guanxilization or categorization: psychological mechanisms contributing to the formation of the Chinese concept of “us”

中国社会心理学在面对急速的社会变迁中，需要以变迁与文化的视角来选择研究 问题，而中国社会文化中群己关系的社会心理机制，即“我们”概念的形成机制及其 转换的可能与条件，正是一个体现着双重视角的基本问题。对这一问题的探讨不仅有 助于解释社会凝聚力、群体行动的逻辑，讨论国家与个人、社会与个人、类别与个人 的关系；也有助于培植社会转型时期的社会心理资源和社会支持系统，从而促进社会 合作。与以往单一机制的分析框架不同，通过对两个个案的讨论，研究提出了一个 新的分析框架，即：中国人“我们”概念是在社会情境的启动和价值取向等因素影响之 下，经由相互交织的“关系化”与“类别化”双重过程形成的。

关键词: “我们”?概念?群己关系?关系?关系化?类别化

Faced with rapid social transformation, the discipline of social psychology in China needs to choose its research topics from the perspective of both change and culture. A basic issue reflecting precisely these two perspectives is that of the formation of the social psychology mechanism of individual‐group relations, namely the formation of the concept of “us” in Chinese society and culture, as well as the possibility and conditions for the transformation of this mechanism. Exploring this issue will not only help us to understand social cohesion and the logic of group behavior and to discuss the relationship between the state and the individual, society and the individual, and the category and the individual; it will also help cultivate social psychology resources and support systems at a time of social transition, and thus promote social cooperation.. Unlike previous analytical studies that focused on a unitary mechanism, this study uses the discussion of two cases to put forward a new framework for analysis: that is, the Chinese concept of “us” comes into being through the mingling of “guanxilization” and “categorization” under the influence of social context priming, value orientation and other factors.