词汇的评价潜势和语境

根据词汇语义中描述意义和评价意义的组合情况,把词汇大致分成三类,即一般评价词汇、具体评价词汇和描述性词汇。分析这三类词汇的评价潜势,可以发现评价理论对它们的评价潜势估计不足。要充分揭示词汇在具体语篇中的评价功能,必须着眼于语境中动态构的评价意义,而不仅仅是编码在词汇语义中的评价意义。     

A corrected likelihood method for the proportional hazards model with covariates subject to measurement error

There has been extensive interest in discussing inference methods for survival data when some covariates are subject to measurement error. It is known that standard inferential procedures produce biased estimation if measurement error is not taken into account. With the Cox proportional hazards model a number of methods have been proposed to correct bias induced by measurement error, where the attention centers on utilizing the partial likelihood function. It is also of interest to understand the impact on estimation of the baseline hazard function in settings with mismeasured covariates. In this paper we employ a weakly parametric form for the baseline hazard function and propose simple unbiased estimating functions for estimation of parameters. The proposed method is easy to implement and it reveals the connection between the naive method ignoring measurement error and the corrected method with measurement error accounted for. Simulation studies are carried out to evaluate the performance of the estimators as well as the impact of ignoring measurement error in covariates. As an illustration we apply the proposed methods to analyze a data set arising from the Busselton Health Study [Knuiman, M.W., Cullent, K.J., Bulsara, M.K., Welborn, T.A., Hobbs, M.S.T., 1994. Mortality trends, 1965 to 1989, in Busselton, the site of repeated health surveys and interventions. Austral. J. Public Health 18, 129–135].     

政府在发展绿色营销中的作用

影响企业绿色营销的力量主要有五种,即:政府、消费者、环保组织、媒体和竞争者,但政府的社会管理者角色和绿色营销的特殊性决定了政府应该在发展绿色营销中发挥主导作用。政府可通过制定规章制度,通过在采购、研究开发等方面的参与,通过控制和激励来改革生产和消费习惯,以及通过教育和合作来影响和推动企业绿色营销。     

高职教育综合实验教学的研究与探讨

高等职业教育的目标是培养应用型、技能型人才。综合实验能激发学生的学习兴趣,调动学生的积极性,有助于培养学生的动手能力和独立工作能力,确实是一条实验教学改革的好路子。     

Online interval scheduling: randomized and multiprocessor cases

We consider the problem of scheduling a set of equal-length intervals arriving online, where each interval is associated with a weight and the objective is to maximize the total weight of completed intervals. An optimal 4-competitive algorithm has long been known in the deterministic case, but the randomized case remains open. We give the first randomized algorithm for this problem, achieving a competitive ratio of 3.5822. We also prove a randomized lower bound of 4/3, which is an improvement over the previous 5/4 result. Then we show that the techniques can be carried to the deterministic multiprocessor case, giving a 3.5822-competitive 2-processor algorithm, and a 4/3 lower bound for any number of processors. We also give a lower bound of 2 for the case of two processors. A preliminary version of this paper appeared in the Proceedings of COCOON 2007, LNCS, vol. 4598, pp. 176–186. The work described in this paper was fully supported by a grant from City University of Hong Kong (SRG 7001969), and NSFC Grant No. 70525004 and 70702030.     

百姓“喜闻乐见”：和谐社会的重要文艺理念——《讲话》之“经”与“权”的思考之三

我国当前文艺理念呈现多元化景观,文艺作品评价的标准多种多样,各自为政。而在"建设和谐社会"的年代,不同标准之间应该有异中见同的交汇点,这个交汇点只能是毛泽东《讲话》中"为中国老百姓喜闻乐见"的标准。近年文艺接受的典型事例已经显示,持意识形态标准评价文艺作品完全可以达到上下一致的喜闻乐见。从现代文艺大家到台港优秀作家也都做出了兼顾精英标准和"喜闻乐见标准"的创作业绩。在"建设和谐社会"的大目标下,经营百姓喜闻乐见的多元文艺,是不同种类文艺发展的必由之路。     

论我国的民事检察制度

由于现行法律对这项制度规定得较为粗疏,民事检察制度的运行显得不尽人意。我国民事检察工作存在的问题主要体现在立法和司法两个方面。民事检察制度是民事法律关系社会化的要求,应当细化民事检察监督程序,赋予检察机关在民事检察中的相应职权。     

Initiating Sexual Experiences: How Do Young Adolescents Make Decisions Regarding Early Sexual Activity?

Understanding how young adolescents make decisions to engage in early sexual activities is vital for intervention efforts aimed at fostering positive youth development and reducing the negative outcomes of adolescent sexual behavior. In‐depth interviews with 42 suburban, mostly White, ninth‐grade adolescents (52% females, mean age=14.1, SD=.45) elicited accounts of their early sexual decisions. We adapted grounded theory methodology to build a model of sexual decision making from the adolescents' narratives. Six dominant categories emerged: contextual factors (relationship and personal characteristics), consideration of risks and benefits, boundary setting, boundary communication, the sexual experience, and evaluation. Our model of early sexual decision‐making processes, developed from the perspectives of young adolescents, highlights active consideration of health and social risks and benefits, as well as the generation of options regarding sexual activity. The model also shows that young adolescents set clear boundaries of sexual limits and evaluate sexual experiences, suggesting a dynamic process of decision making.     

谈EDA技术教学

针对电子设计自动化(EDA)技术的迅猛发展,提出了在计算机专业引入EDA技术课程的必要性,介绍了EDA技术教学的主要内容,总结了理论教学,实验教学以及课程设计的教学方法.     

Online bin packing of fragile objects with application in cellular networks

We study a specific bin packing problem which arises from the channel assignment problems in cellular networks. In cellular communications, frequency channels are some limited resource which may need to share by various users. However, in order to avoid signal interference among users, a user needs to specify to share the channel with at most how many other users, depending on the user’s application. Under this setting, the problem of minimizing the total channels used to support all users can be modeled as a specific bin packing problem as follows: Given a set of items, each with two attributes, weight and fragility. We need to pack the items into bins such that, for each bin, the sum of weight in the bin must be at most the smallest fragility of all the items packed into the bin. The goal is to minimize the total number of bins (i.e., the channels in the cellular network) used. We consider the on-line version of this problem, where items arrive one by one. The next item arrives only after the current item has been packed, and the decision cannot be changed. We show that the asymptotic competitive ratio is at least 2. We also consider the case where the ratio of maximum fragility and minimum fragility is bounded by a constant. In this case, we present a class of online algorithms with asymptotic competitive ratio at most of 1/4+3r/2, for any r>1. A preliminary version of this paper appeared in Proc. of Workshop on Internet and Network Economics (WINE’05, pp. 564–573). The research of W.-T.C. was supported in part by Hong Kong RGC grant HKU5172/03E. The research of F.Y.-L.C. was supported in part by Hong Kong RGC Grant HKU7142/03E. The research of D.Y. was supported by NSFC (10601048). The research of G.Z. was supported in part by NSFC (60573020).