改进的OBS长度自适应门限组装算法

现有OBS长度自适应组装算法的突发数据长度门限的选择虽然随着业务流的变化而变化,克服了固定长度门限算法输出的突发数据的突发性,但仍然没有考虑业务流的自相似特性,因此不能有效降低输出突发数据的自相似程度和分组阻塞率。针对这一问题,该文提出了一种改进的OBS长度自适应门限组装算法,能根据到达的网络业务流的自相似特性自适应地调整长度门限值。仿真结果表明:在相同的调度算法下,更能降低业务流的自相似性,分组阻塞率降低一个数量级。     

Some quantitative concepts of value and utility from a utilitarian point of view

This paper clarifies and interprets some basic quantitative concepts of value, utility and utility function from a utilitarian point of view. First, I discuss the question as to whether value is objective or subjective. I hold that value is subjective and statistical in nature (although from the various subjective values of a certain object a norm can usually be obtained). Second, I emphasize the distinction between use value and exchange value in relation to utility. Third, I propose a law of diminishing incremental interest, which refers to the incremental (marginal) utility of money. Fourth, I identify the utility of money with the von Neumann-Morgenstern utility. Fifth, I question the necessity of the usual normalization of utility functions and the restricted linear transformation (and the consequent concept of strategic equivalence). Sixth, I discuss in detail the terminal values and utilities of a utility function from a philosophical rather than mathematical point of view, particularly the boundedness of a utility function and the magnitudes of V ₀ and U ₀. Finally, I conclude that, in order to be able to have interpersonal comparisons of utility, utility should have the same dimension as value rather than no dimension, and the normalization problem should be reconsidered in the light of terminal values and utilities.     

房价上涨对我国人口出生率的影响——基于省级面板数据的实证分析

人口数量和结构是影响我国可持续发展的关键因素,住房是人民群众安居乐业的刚需。近年来,我国人口出生率持续下降。为了实现经济高质量发展,缓解人口危机是当前亟待解决的重要问题。为了探究房价上涨对于我国人口出生率的影响,利用31个省级行政区2010—2019年的面板数据和加权最小二乘法进行实证分析,结果表明：房价上涨对人口出生率产生显著的负向影响,住房价格平均上涨1%将导致人口出生率下降0.13%~0.22%;房价上涨对人口出生率的影响在东部省份以挤出效应为主、在中西部省份是以财富效应为主。当前,通过遏制住房投资投机性需求、给予“刚需”人群购房贷款优惠、适量增加东部省份土地供给等手段,可以助力解决我国当前的人口问题。     

“健康丝绸之路”构建的“政府—社会”复合路径

借鉴社会运动理论,可探索一种融合了政府自上而下和社会自下而上进程的“政府—社会”复合路径,以构建“健康丝绸之路”。社会运动理论的三种视角可为这种复合路径的具体实施与需要关注的环节带来重要启发：首先,当前新冠肺炎疫情的跨国传播暴露了全球公共卫生治理体系存在的严重不足,凸显出构建补充型国际卫生合作模式的必要性与紧迫性;其次,推进“健康丝绸之路”的构建,需要政府和社会层面的协作,将“一带一路”沿线国家的资源充分调动起来,形成优势互补与资源共享。与此同时,要推进健康话语体系的完善,如倡导和促进“人类卫生健康共同体”理念的传播,通过话语和心理共鸣等民心相通的途径,促使国际社会采取联合行动以共同应对全球公共卫生危机。     

De minimis and equity in risk

Indices and orderings are developed for evaluating alternative strategies in the management of risk. They reflect the goals of reducing individual and collective risks, of increasing equity, and of assigning priority to the reduction and to the equity of high risks. Individual risk is defined as the (random or non-random) level of exposure to a danger. In particular the role of a lower negligibility level is investigated. A class of indices is proposed which involves two parameters, a negligibility level and a parameter of inequality aversion, and several interpretations of the indices are discussed. We provide a set of eight axioms which are necessary and sufficient for this class of indices, and we present an approach to deal with partial information on the parameters.     

Estimation of critical points in the mixture inverse Gaussian model

The maximum likelihood estimation for the critical points of the failure rate and the mean residual life function are presented in the case of mixture inverse Gaussian model. Several important data sets are analyzed from this point of view. For each of the data sets, Bootstrapping is used to construct confidence intervals of the critical points.     

正确把握新时代坚持和加强党的全面领导的逻辑理路——中国化马克思主义发展思想研究

党的十九大明确作出“坚持和加强党的全面领导”的重大政治论断,并把它作为新时代“党的建设”总要求的首要观点、坚持和发展中国特色社会主义“基本方略”的第一条提出来,这是中国共产党人进行党建工作的基本指导和根本遵循。新时代,正确把握坚持和加强党的全面领导的逻辑理路至关重要,因为这是我们党与生俱来和新时代历史使命的必然要求,是我们党带领人民战胜敌人的强大法宝和克服一切困难风险的定海神针;是执政党持之以恒正风肃纪和紧锣密鼓反腐惩恶的内在需要和客观要求。     

湖湘大地才是炎帝文化的母体——兼与中华炎黄文化研究会商讨“炎帝故里”问题

湖南是原始拜火教的发源地和稻作农业的诞生地,也是炎帝族中心聚落的所在地,湖南才是炎帝文化的母体。中华炎黄研究会认为山西高平是炎帝故里的说法缺乏关键证据支持,因而难以成立。     

汇率对中国对韩直接投资影响的实证研究

利用1989-2003年年度数据对汇率水平和波动对中国对韩国直接投资的影响进行实证研究。研究表明,人民币对韩元升值对中国对韩国直接投资有不够显著的正影响,人民币对韩元波动程度增加对中国对韩国直接投资有显著的正影响。政策含义在于：2005年人民币汇率改革对中国企业实施“走出去”战略和缓解人民币升值压力有深远影响。     

本科毕业生就业率分析与研究

以昆明某大学本科毕业生初次签约率为依据,分析了本科生就业率的特点和影响本科生充分就业的主要因素,认为近几年来本科生就业率下滑,主要是由于云南省工业基础薄弱,产业升级,结构调整缓慢,在一定程度上限制了本地区对本科生人才的需求和吸纳能力,以及高校对市场人才需求的反应速度滞后等供求之间的结构性矛盾造成的。