发展战略对能源消费强度的影响 ——基于新结构经济学的分析

基于新结构经济学理论,测度1995—2019年中国分地区的发展战略指数,并利用面板双固定模型考察地区赶超战略对能源消费强度的影响与机制。研究表明：第一,中国分地区发展战略指数总体上呈现显著下降趋势,发展战略日益趋向于符合比较优势,东部地区发展战略指数最低,中部地区次之,西部地区最高;第二,面板双固定效应模型显示,当地区实行违背比较优势的发展战略时会增加能源消费强度,且该效应具有时间和空间异质性;第三,机制检验表明,违背比较优势的发展战略使得企业缺乏自生能力、产业结构扭曲和财政压力增加进而弱化了环境约束,从而提高了能源消费强度。为了促进节能减排,中国应致力于实行遵循比较优势的发展战略,促进西部地区高质量发展等。     

基于有限元法的脱水压榨机强度校核

为了保证隧道洗衣机有良好的脱水性,根据相关规范,设计了符合隧道式洗衣机的脱水压榨机,综合运用实体单 元和连接单元,建立了包括上下横梁、中间四根拉杆的有限元模型,并利用ABAQUS软件对于模型进行网格划分,施加材 料属性以及必要的约束和静力载荷,最后进行了应力分析强度校核。结果表明在额定工况下,从应力云图以及位移云图 验证了脱水压榨机主要部件应力均在安全范围内,其强度均满足要求。     

以全国大学生电子设计竞赛为契机促进大学生知识融合

全国大学生电子设计竞赛是促进学生知识融合的一个良好平台,竞赛培训及参赛过程是学生知识能力锻炼、融铸、升华的过程.以大学生电子设计竞赛为契机,促进多学科和多专业知识、理论和实践知识、专业和社会知识、专业和心理素质的融合,推动高校创新型人才的培养.     

Fatter or fitter? On rewarding and training in a contest

Competition between heterogeneous participants leads to low-effort provision in contests. A principal can divide her fixed budget between skill-enhancing training and the contest prize. Training can reduce heterogeneity, increasing effort. It also reduces the contest prize, making effort fall. We set up an incomplete-information contest with heterogeneous players and show how this trade-off is related to the size of the budget of an effort-maximizing principal. A selection problem arises implying a cost associated with a win by the inferior player. The principal has a larger incentive to train the laggard, reducing the prize on offer.     

严复译介《天演论》的旨趣及其产生的影响与论争

甲午战争中国惨败的结局极大地震惊了中国社会。在此背景下严复翻译《天演论》,物竞天择的竞争进化论遂由此倡行国内,且被维新人士改铸为国际竞争理论,为激励国人奋起救国提供一个新的理论。然一战爆发后,中国处境危殆,其时文化人将大战之祸归罪于竞争进化学说,指出应以互助论进化观取代竞争进化论。此种氛围消解了竞争进化论下凸显的国家观,促成中国传统的天下大同思想的回归。     

长三角地区碳排放的测度、比较及影响因素分析:1990—2009年

依据联合国政府间气候变化专门委员会（IPCC）碳排放计算指南中的计算公式,计算了长三角地区1990—2009年间CO2排放量,对比分析了江浙沪三省市的碳排放总量、排放强度、人均排放量等指标。结果表明：自1990年以来,长三角地区CO2排放总量、人均碳排放量不断攀升,碳排放强度逐年减小,但区域之间仍存在较大差异;江苏的碳排放总量高于浙江,上海最低,且江浙两省碳排放总量增长速度最快;江苏年均CO2排放强度高于上海,浙江最低;能源结构、产业结构是造成区域性差异的主要因素。根据上述研究结果,提出实现CO2减排的政策建议。     

Modeling and predicting extreme cyber attack rates via marked point processes

Cyber attacks have become a problem that is threatening the economy, human privacy, and even national security. Before we can adequately address the problem, we need to have a crystal clear understanding about cyber attacks from various perspectives. This is a challenge because the Internet is a large-scale complex system with humans in the loop. In this paper, we investigate a particular perspective of the problem, namely the extreme value phenomenon that is exhibited by cyber attack rates, which are the numbers of attacks against a system of interest per time unit. It is important to explore this perspective because understanding the statistical properties of extreme cyber attack rates will pave the way for cost-effective, if not optimal, allocation of resources in real-life cyber defense operations. Specifically, we propose modeling and predicting extreme cyber attack rates via marked point processes, while using the Value-at-Risk as a natural measure of intense cyber attacks. The point processes are then applied to analyze some real data sets. Our analysis shows that the point processes can describe and predict extreme cyber attack rates at a very satisfactory accuracy.     

Asymptotic Inference for Jump Diffusions with State‐Dependent Intensity

We establish the local asymptotic normality property for a class of ergodic parametric jump‐diffusion processes with state‐dependent intensity and known volatility function sampled at high frequency. We prove that the inference problem about the drift and jump parameters is adaptive with respect to parameters in the volatility function that can be consistently estimated.     

排放权交易的理论基础和实施环境分析

排放权交易是在实行总量控制制度的前提下,通过明晰产权的方式将市场机制充分运用于环境资源配置的有效手段和实现环境与社会和谐发展的经济政策。鉴于排放权交易制度取得的巨大成效和我国经济发展所面临的严重的环境资源约束,探讨了排放权交易制度的理论基础,并对我国碳强度减排目标约束下的排放权交易制度的实施环境进行了深刻剖析,旨在为应对全球气候变化和国内外的减排压力提供新的管理思路。