Pathways of China's PM2.5 air quality 2015–2060 in the context of carbon neutrality

Clean air policies in China have substantially reduced particulate matter (PM_2.5) air pollution in recent years, primarily by curbing end-of-pipe emissions. However, reaching the level of the World Health Organization (WHO) guidelines may instead depend upon the air quality co-benefits of ambitious climate action. Here, we assess pathways of Chinese PM_2.5 air quality from 2015 to 2060 under a combination of scenarios that link global and Chinese climate mitigation pathways (i.e. global 2°C- and 1.5°C-pathways, National Determined Contributions (NDC) pledges and carbon neutrality goals) to local clean air policies. We find that China can achieve both its near-term climate goals (peak emissions) and PM_2.5 air quality annual standard (35 μg/m³) by 2030 by fulfilling its NDC pledges and continuing air pollution control policies. However, the benefits of end-of-pipe control reductions are mostly exhausted by 2030, and reducing PM_2.5 exposure of the majority of the Chinese population to below 10 μg/m³ by 2060 will likely require more ambitious climate mitigation efforts such as China''s carbon neutrality goals and global 1.5°C-pathways. Our results thus highlight that China''s carbon neutrality goals will play a critical role in reducing air pollution exposure to the level of the WHO guidelines and protecting public health.     

基于虚拟仿真技术的线上项目式教学探索

为解决实践教学环节中线上授课存在的师生互动不足、实验教学资源匮乏以及教师监督功能弱化等问题,设计并实施了项目式教学方案.该方案将项目式教学模式和虚拟仿真实验教学手段有机结合,从教学形式、实践教学平台、成绩评价指标体系3个方面进行革新.教学形式采用"项目式教学+翻转课堂"的方案;实践教学平台引入虚拟仿真控制系统实验资源,...     

中国人才资源流动的组织选择研究

为了科学地研究人力资源流动的组织选择问题,在海南、广东、上海、北京发放个人问卷2000份,运用SPSS系统对回收的问卷进行了分析研究,并通过对人才流动后组织选择的相关性因素提出一系列建议,为进一步科学地研究人才资源流动提供基础研究。     

基于实物期权的高新技术企业战略柔性决策研究

本文将实物期权思想引入高新技术企业战略柔性决策,使其从定性和定量两方面均具有方法论的支持,并识别和分析高新企业战略柔性决策中实物期权的种类和来源,建立基于实物期权的高新技术企业战略柔性决策过程,进而主动的创造期权,使高新技术企业在高度不确定的环境中拥有更多的主动权和灵活性。     

Effects of Hg and Cu on the activities of soil acid phosphatase

Comparative study on the activity and kinectic properties of acid phosphatase (ACPase) of three soils amended with Hg and Cu at constant temperature and humidity was carried out. The results indicated that the inhibition on ACPase of the three sample soils by Hg and Cu varied with the content of soil organic matter and pH, where, Soil 1 was the most seriously contami- nated due to its lowest content of organic matter and the lowest pH among three samples, Soil 2 took the second place, and Soil 3 was the least contaminated. Except Soil 3, the activity of soil ACPase tended to increase along with the contact time under the same type and the same concentration of heavy metal. In particular the Vmax values of ACPase in all three samples decreased with increasing Hg and Cu concentration, whereas the Km values were affected weakly. According to the change of Vmax and Km values, Cu and Hg had the same inhibition effect on soil ACPase. Both of them may be a type of compound of non-competitive and anti-competitive inhibition. Statistic analyses indicated that activities of soil ACPase and Vmax values could serve as bioindicator to partially denote the heavy metal Hg and Cu contamination degree.     

论远程高等教育的现代性及其选择

远程高等教育凝聚现代教育理念、创建现代教育结构、重视交互与对话,突显其现代个性。在后现代主义的影响下,远程高等教育从思想观念、制度结构和资源技术等方面进一步增强了现代性。我国远程高等教育现代性的选择,应基于国情转变发展战略,由面向城市转为面向农村;由以教师为本转向以学生为本;由只重视学历教育转向重视多种教育形式协调发展。     

技术能力对新产品开发绩效的影响:以技术管理为调节变量

新产品开发作为企业经营过程中的重要环节,是企业获取竞争优势的重要源泉。从理论上分析了技术能力对新产品开发绩效的影响,以及技术管理的对技术能力与新产品开发绩效关系的调节作用。利用对151家企业调查的数据进行实证分析,研究结果发现,技术能力各要素均对新产品开发绩效有显著的正向影响作用,其中人员能力影响最大,其次是组织能力,再次是信息能力,设备能力影响较小。研究结果同时发现技术管理对人员能力、设备能力、信息能力、组织能力与新产品开发绩效的关系均具有正向调节作用。     

基于PRISMA声明的我国运动干预类元分析报告质量评价

目的:评价我国运动干预类元分析研究的报告质量,并分析其影响因素。方法:应用PRISMA声明中"系统评价和元分析优先报告清单"作为评估指标,评估近十年CSSCI和CSCD收录的运动干预类元分析报告质量。结果:共纳入文献68篇,运动干预类研究数量呈现逐年上升趋势。纳入论文均有不同程度的报告缺陷,主要存在标题不规范、不符合结构式摘要的要求、前言部分未报告前人的研究成果、方法学部分未报告研究方案与注册信息、研究结果不完整等问题。高、中、低质量的论文分别占22.1%、45.5%、32.4%,CSCD论文的报告质量优于CSSCI论文(t=-0.498,P=0.02)。结论:运动干预类元分析报告规范性较差,报告质量中低水平较多。"运动干预方案和注册体系的不完善"以及"元分析报告范式的随意性"是制约元分析报告质量的重要因素。     

2000年兼容问题解决思路

阐述了2000年兼容问题的实质以及给经济带来的影响, 提出了几种修改方法, 并指出了解决步骤, 对解决2000年兼容问题具有一定的现实意义。     

做强中国报刊业的思考

目前中国报业的发展卡在了三个瓶颈口上 :只生不死 ,盘活资源难 ;条块分割 ,做大规模难 ;法律滞后 ,自主经营难。解决上述问题首要的是必须建立现代企业制度 ,要建立现代企业制度 ,必须明确报刊的属性 ,从根本上打破行业分割、部门分割、媒介分割、地区分割、资源分割、市场分割的“吃不饱、饿不死”的局面 ,实施行业发展战略 ,打造航母 ,准备与“狼”一争