现代畜牧企业社会责任初探

本文主要探讨了现代畜牧企业社会责任内容以及当前我国畜牧企业社会责任存在的问题及原因。对于如何提升畜牧企业社会责任,本人认为主要从政府、社会层面、企业层面和行业层面来提升现代畜牧企业的社会责任。     

Value at risk and conditional extreme value theory via markov regime switching models

This study develops a new conditional extreme value theory‐based (EVT) model that incorporates the Markov regime switching process to forecast extreme risks in the stock markets. The study combines the Markov switching ARCH (SWARCH) model (which uses different sets of parameters for various states to cope with the structural changes for measuring the time‐varying volatility of the return distribution) with the EVT to model the tail distribution of the SWARCH processed residuals. The model is compared with unconditional EVT and conditional EVT‐GARCH models to estimate the extreme losses in three leading stock indices: S&P 500 Index, Hang Seng Index and Hang Seng China Enterprise Index. The study found that the EVT‐SWARCH model outperformed both the GARCH and SWARCH models in capturing the non‐normality and in providing accurate value‐at‐risk forecasts in the in‐sample and out‐sample tests. The EVTSWARCH model, which exhibits the features of measuring the volatility of a heteroscedastic financial return series and coping with the non‐normality owing to structural changes, can be an alternative measure of the tail risk. © 2008 Wiley Periodicals, Inc. Jrl Fut Mark 28:155–181, 2008     

石家庄市冬季典型重污染过程分析

为研究石家庄市冬季重污染天气过程的成因及影响因素,对2015-01-07至2015-01-10这一时间段的重污染过程从PM2.5浓度变化、气象条件演变及其对PM2.5浓度的影响、PM2.5与主要气态污染物的相关性、区域性污染传输等方面进行分析。结果表明:此次石家庄市重污染过程是在区域性大气静稳态背景下形成的,地面压力及风场对PM2.5浓度影响较大;石家庄NO2浓度与PM2.5浓度相关性很高,机动车尾气对城市的污染逐渐加剧;SO2浓度与PM2.5浓度相关性高说明燃煤仍是石家庄市重要污染来源;该时间段河北南部城市区间存在污染物区域性传输。     

蒙脱石散剂治疗小儿腹泻的临床疗效

目的探讨蒙脱石散剂治疗小儿腹泻的临床疗效。方法选取住院治疗的腹泻患儿86例,随机均分为对照组与观察组,各43例。对照组患儿给予抗病毒、抗炎治疗、液体疗法及对症治疗等常规治疗;观察组患儿在常规治疗的基础上给予口服蒙脱石散剂治疗。比较两组患儿的临床疗效及胃肠道不良反应发生情况。结果治疗72 h后,观察组患儿的治疗总有效率为95.3%,1例(2.3%)发生胃肠道不良反应;对照组患儿的治疗总有效率为81.4%,7例(16.3%)发生胃肠道不良反应;观察组明显优于对照组,差异均有统计学意义(均P<0.05)。结论给予患儿口服蒙脱石散剂治疗儿科腹泻可加强常规治疗的临床治疗效果,同时减少胃肠道不良反应的发生。     

Effect of Order of Contribution in a Sequential Public Goods Dilemma

This study examined how order of contribution in a sequential public goods dilemma affected cooperation. Under a sequential protocol of play, players of different levels of efficacy made decisions one after another. We contrasted a High-to-low versus Low-to-high Efficacy order in a nine-person game. Under a High-to-low order, high-efficacy players made decisions in positions 1–3, medium-efficacy players in positions 4–6, and low-efficacy players in positions 7–9. Under a Low-to-high order, the positions of high- and low-efficacy players were reversed. We hypothesized that cooperation rates would be higher in the High-to-low order that high-efficacy players (assigned in early positions), who would likely cooperate, would induce subsequent players to cooperate also. We found the anticipated effect that cooperation rate was higher in the High-to-low than the Low-to-high efficacy order. The efficacy order effect was the most prominent when people perceived that their group was becoming uncooperative. This study illustrates a new type of structural solution to social dilemmas that by systematically assigning people to different sequential positions, a group can be made more or less cooperative.     

家电行业绿色供应链构建研究

电子废弃物是21世纪增长最快的垃圾之一,传统的处理方式不仅会对生态环境造成严重的污染,同时也是对可再生资源的一种浪费。本文介绍了国外发达国家针对电子废弃物所颁布的相关法令法规,分析了我国目前对电子废弃物处理的现状,在"4R"原则的指导下,对如何构建家电行业绿色供应链以及不同的回收方式进行了探讨。     

农村社会养老保险制度分析——以北京市大兴区为例

农村社会养老保险能否建立并保持可持续发展,仅仅依靠需求动机是不够的,还需要政府的态度、财政能力、农民的意愿、制度设计的合理性等多方面条件。结合北京市大兴区农村社会养老保险试点方案,对上述问题作了简要分析。农村全面实行社会养老保险制度的时机还不够成熟。从防范老年贫困风险的角度出发,对处于贫困线以下的人群提供最低收入保障,尽快建立农村最低生活保障制度和完善农村社会救助制度是目前大多数农业地区比较理性的选择。     

我国知识产权试点示范工作对专利申请活动的影响简

在系统梳理国家级知识产权试点示范工作的基本情况和政策法规的基础上,以第一批全国60家企事业专利试点单位为研究对象,利用国家知识产权局专利检索数据库公布的数据,对其在1985—2011年的发明专利、实用新型专利和外观设计专利的申请量进行检索和统计,分3个阶段（试点单位认定前、试点工作开展期间、试点工作结束后）对其专利申请情况进行定量分析,探讨知识产权试点示范工作对专利申请活动的影响。结果显示：在试点单位认定前,试点单位的专利申请量增长明显;在试点示范工作执行期内,其专利申请量没有发生显著变化;在试点工作结束后,企事业单位的专利申请量和申请专利的企事业单位数量都有所增加。这表明,知识产权试点示范工作的开展在一定程度上促进了专利申请量的增长,但是存在部分企业为获得认定而申请专利的现象。     

一种多信道的分簇式短波令牌协议

传统的短波令牌协议（HFTP）调度方式单一,在没有数据传送时,信道资源会被各节点间的令牌传递所占用,且令牌在通信质量较差时易丢失。基于此,提出一种多信道的分簇式短波令牌协议（CHFTP）,通过以通信质量评估为标准的分簇算法和基于预约的动态令牌调度,减小了令牌丢失的概率和令牌传递、处理的开销,并给出了仿真分析。仿真结果表明,该协议的端到端平均时延和网络吞吐量明显优于短波令牌协议,CHFTP的平均时延最多可减少75%,网络吞吐量最多可增加66.7%,适合在短波通信网络中使用。     

中国农村生活污水处理技术研究进展

在农村污染状况日益严峻的背景下,分析中国污水处理技术发展现状,探索适宜污水处理技术,对提升生活污水治理率、推动农村人居环境整治、建设宜居美丽乡村具有重要意义.采用M eta分析方法,对近年来农村生活污水处理技术研究及专利公开情况进行统计学分析.总结国内农村常用生活污水处理技术现状,分析中国农村污水处理技术对主要污染指标的去除效果,统计农村污水处理技术专利申请情况,为农村生活污水治理提供参考性价值,为实现农村可持续发展奠定基础.