炼焦化学工业的技术进展

分析了高炉喷煤技术对炼焦工业的影响,综述了先进的,工业化程度较高的炼焦新工艺的开发及工业化,对我国炼焦工业的发展提出了一些建议。     

基于需求冲击分析的产业集群治理机制

本文立足于对产业集群组织特性的再认识,分析了产业集群与网络组织的相互关系,指出产业集群中的核心组织类型是应对需求冲击的实体企业和虚拟企业,并通过对需求冲击的分析,重新划分了产业集群的类型,提出了产业集群治理机制的新思路,从而解决了经典公司治理理论对于产业集群治理研究的适用性问题.     

人工智能发展对通胀动态的影响及政策挑战——基于动态随机一般均衡模型的分析

人工智能的发展是生产力进步的表现,但广泛使用人工智能技术的经济效应尚待深入研究。基于人工智能对劳动的替代作用,将人工智能投资引入动态随机一般均衡模型,通过比较静态分析和短期动态分析考察人工智能发展对通胀动态的影响。稳态分析表明：人工智能投资效率提高和使用范围扩大均会提升劳动生产率进而提高产出水平,但对长期或趋势通胀没有影响;在人工智能发展初级阶段人工智能的发展会引起实际工资下降,而在相对高级阶段人工智能的发展会引起实际工资上升。短期动态分析显示：人工智能发展水平的提高,无论是投资效率的提高还是使用范围的扩大,都会导致通胀及实际边际成本对偏好冲击和技术冲击等外生冲击的反应变弱。人工智能的发展会使通胀动态与实际经济活动变化间的联系减弱,其原因是人工智能对劳动的替代作用使工资调整不再是应对外生冲击的必然选择,进而改变了外生冲击通过影响工资来影响通胀的传导机制。因此,发展人工智能在促进生产率提升和产出增长的同时,还会改变宏观经济变量间的传导机制,进而对通胀等政策调控目标变量的准确预测以及政策调整和实施的有效性带来新的挑战,也为金融理论研究提出新的课题。     

海面低仰角数字微波通信系统性能及体制分析

本文介绍了海面低仰角数字微波通信系统的特点，对海面电波多径衰落进行了理论计算，指出了通信系统抗衰落的方法和手段，并给出了一种抗衰落通信系统在海面通信试验中的测试数据。     

海洋环境监测高频地波雷达的研究现状与发展趋势

高频地波雷达作为一种海洋遥感的重要手段，已有30多年的历史，它可用于海洋表面风、浪、流等状态参数的提取，还可用于目标探测，在专属经济区的监测中，高频地波雷达具有无可比拟的优势。本文介绍了高频地波雷达的发展历史和研究现状及其应用领域，详细叙述了武汉大学研制的高频地波雷达OSMAR2000的体系结构、性能指标和信号处理方法，最后对该研究领域的发展趋势作了简要分析。     

盈利能力、环境执法与环保法律实施的股价冲击——基于新《环境保护法》出台的事件研究

基于合规成本理论,围绕新《环境保护法》（以下简称“新法”）的出台,采用沪深两市A股重污染行业上市公司的相关数据,运用事件研究法和多元截面回归实证考察了“史上最严环保法”的股价冲击及其影响因素。实证发现：（1）“新法”颁布和实施均造成了显著的股价冲击;（2）“新法”颁布事件窗口,上市公司的盈利能力加剧了股价冲击,上市公司外部的环境执法力度缓解了股价冲击;（3）“新法”实施事件窗口,盈利能力缓解了股价冲击,环境执法力度与股价冲击没有显著的相关关系。研究表明,“新法”颁布表现出政策冲击效应,而“新法”实施表现出信息发现效应。研究结论有助于理解投资者的行为特征、决策的过程及影响机制。     

The gloom of the COVID-19 shock in the hospitality industry: A study of consumer risk perception and adaptive belief in the dark cloud of a pandemic

As the new coronavirus (COVID-19) spreads globally, the hospitality industry is at the heart of implementing social distancing, a measure demonstrated to be effective in flattening the epidemic curve. Informed by the perceived risk theory, this research examines how the customer’s perception of the shock of the coronavirus pandemic impacts on their beliefs, and how their beliefs could influence their anticipated emotions (negative and positive) which could affect their future desire towards visiting restaurants. Structural equation modelling was used to understand the research constructs’ associations. This study provides two key suggestions: (i) that the hospitality industry is built on trust from their customers by supporting and resourcing consumers’ self-protection behaviour and adoptive belief, and (ii) that the economic influence and the continuous uncertainty and transformation of the restaurant business need the enhancement of localisation strategies, practices and performance.     

Foreign output shock in small open economies: A welfare evaluation of monetary policy regimes

We examine the impact of negative foreign output shocks, which entail negative demand side effects by lowering exports and positive supply side effects by lowering oil prices, on the welfare of non-oil producing, small open economies under five exchange rate and monetary policy regimes. We use a dynamic stochastic general equilibrium model with parameter values calibrated for Hong Kong, Israel, Singapore, South Korea and Taiwan. We find that welfare levels among the five policy regimes depend on the economy's share of oil imports in world oil consumption. Hong Kong, Singapore and Israel, which have smaller shares, maximize welfare under the Taylor rule, which targets both CPI inflation and real output. South Korea, with higher shares, and Taiwan, with more rigid prices, maximize welfare under real output targeting. CPI inflation targeting, nominal output growth targeting and fixed exchange rate regimes generate lower welfare. However, optimal monetary policy, which generates the highest welfare, gives greater weight on real output than CPI inflation.     

Past Experiences,Personality Traits,and Risk Aversion: Evidence from Individual Risk Attitudes during the COVID-19 Pandemic

Individuals’ risk attitudes play an important role in economic decision making and policy evaluation, particularly in the midst of unprecedented uncertainty caused by the COVID-19 pandemic. We adopt a multiple-price-list elicitation method with real money incentives to measure precisely individuals’ risk attitudes at different stake levels and the extent to which they are affected by personal and social shocks following the COVID-19 outbreak in China. We find that subjects who had previously experienced negative personal shocks are more risk-averse at medium and large stakes but more risk loving at very small stakes. For our sample, COVID-19 has no significant impact on risk attitudes, as it is more likely to be regarded as a social shock. The result indicates that the impact of COVID-19 on individual risk attitudes is not as influential as expected, unless the individual’s personal life is affected directly.