多任务委托——代理关系中激励机制优化设计

本文对任务之间存在可替代性的多任务委托--代理激励机制优化设计问题进行了研究,并在优化模型的基础上,对相对激励强度进行了比较静态分析.研究表明,委托人对于重要性高的任务的激励力度应高于重要性低的任务的激励力度;同时,委托人对于不确定性较低任务的激励力度也应大于不确定性较高任务的激励力度;而随着两任务可替代性的增强,这种较高的激励力度应该得到进一步加强.     

企业雇员组织承诺三因素模型实证研究

文章以来自西安15家企业中的742名雇员为样本,采用协方差结构等式模型对组织承诺三因素模型在中国企业雇员中的适用性进行了初步考察。研究主要发现:测量感情承诺和规范承诺的量表具有可接受的信度,但是测量连续承诺的量表信度较低。三个量表表现出可接受的会聚和区分效度,但是效标效度还需要进一步的研究。     

Center and Distinguisher for Strings with Unbounded Alphabet

Consider two sets and of strings of length L with characters from an unbounded alphabet , i.e., the size of is not bounded by a constant and has to be taken into consideration as a parameter for input size. A closest string s* of is a string that minimizes the maximum of Hamming¹ distance(s, s*) over all string s : s . In contrast, a farthest string t* from maximizes the minimum of Hamming distance(t*,t) over all elements t: t . A distinguisher of from is a string that is close to every string in and far away from any string in . We obtain polynomial time approximation schemes to settle the above problems.     

火力发电厂企业集成体系结构的研究

在电力市场的竞争压力面前,火力发电厂对管理变革以及支持这样的变革的信息化支撑环境表现出迫切需求。本文以提升火力发电厂综合竞争力为出发点,分析了火力发电厂管理变革的特征,研究了支撑火力发电厂管理变革的企业集成的体系结构。     

社会关联视角下的东北新型移民村庄

弱社区记忆、低度的经济社会分化构成1949年之后兴起的东北新型移民村庄的低度社会关联.市场经济、大众文化日益将社区记忆弱化及多元化,家庭农场经营方式延缓社区经济分化.新型移民村庄社会网络日益外展,这些因素将使村庄内生的社会关联长期保持在低水平.外生的乡村政治组织作为村庄独大的社会关联力量,左右着村庄的政治生态.村庄内部缺乏应对国家政权的有效的社会关联机制.     

如何提高大学生英语评论文的写作能力

从评论文及其特点、评论文写作的前提步骤及写作的指导方针等方面，阐明英语评论文的写作。     

The Role of Career Barriers in High School Students' Career Choice Behavior in Taiwan

The purpose of this study was to examine the role of career barriers in social cognitive career theory (R. W. Lent, S. D. Brown, & G. Hackett, 1994). The participants were 584 high school students in Taiwan, Republic of China. The gender differences in perceived career barriers and career self‐efficacy were significant. Results of hierarchical regression analyses indicated that some of the perceived career barriers were significant in predicting individuals' career choice behavior after controlling for career self‐efficacy in certain career types.     

由范畴系统言说后现代城市美学的构建

自20世纪中叶开始形成的后现代城市美学已经有一个比较成熟的潜在的理论体系,对当代城市学和城市设计实践影响深刻.但目前对其进行理论研究和显性的理论构形与表述尚在开山中.本文对后现代城市美学的范畴系统,以游戏城市范畴系、栖居城市(存在空间)范畴系、拼贴城市(存在时间)范畴系、意象城市范畴系、生态城市范畴系分类进行研究分析.后现代城市美学的范畴系统体现了后现代城市的价值取向,其涉及面相当广阔,但焦点主要不集中在城市表观的形式美或功能价值,而是城市的存在性的美,强调审美的主体间性.     

浅谈英汉互译的一些障碍

本文从汉英翻译的角度探讨了互译中的理解障碍。     

An Exposure Assessment of Methyl Mercury via Fish Consumption for the Japanese Population

The objective of this article was to propose an exposure assessment model to describe the relationship between fish consumption and body methyl mercury (MeHg) levels in the Japanese population. Individual MeHg intake was estimated by the summation of species-specific fish consumption multiplied by species-specific fish MeHg levels. The distribution of fish consumed by individuals and the MeHg level in each fish species were assigned based on published data from Japanese government institutions. The probability of MeHg intake for a population was accomplished through a Monte Carlo simulation by the random sampling of fish consumption and species-specific MeHg levels. Internal body MeHg levels in blood and hair were estimated using a one-compartment model. Overall, the mean value of MeHg intake for the Japanese population was estimated to be 6.76 μg/day or 0.14 μg/kg body weight per day (bw/day), while the mean value for the hair mercury level was 2.02 μg/g. Compared with the survey data that tabulated hair mercury levels in a cross-section of the Japanese population, the simulation results matched the hair mercury survey data very well for women, but somewhat underestimated for men and all of the population. This exposure assessment model is a useful attempt at further risk assessment with respect to a risk-benefit analysis.