中国国民经济总量与房地产业的关系研究

房地产业在国民经济中保持"波动型"上升态势,具有支柱产业的特征;房地产业的开发投资所发挥的整体作用与国民经济总量密切相关,房地产投资不能离开土地等要素而单方面发挥作用;房地产业受到国民经济总量增长的带动,且不能缺少资金的支持。总之,房地产业与国民经济总量的波动具有很强的一致性。     

高压变频器应用中的问题分析及对策研究

变频器是一种常见的电力控制设备,在工业化生产企业的控制系统中是核心装置。由于我国工业自动化生产模式的推广,对各种电力设备进行综合调控成为了企业必须要考虑的问题。变频器在自动控制系统里结合变频技术、微电子技术等,利用调整电机工作电源频率以达到控制交流电动机的效果,这种功能对电网的高效率运行有着重要的作用。高压变频器在调控频率时容易受到外界因素的干扰,导致控制系统操作效率降低。文章主要分析了高压变频器的电磁干扰源及有关的处理措施。     

《塑料成型工艺与模具设计·“干涉”现象》项目教学设计

本文通过分析《塑料成型工艺与模具设计》课程专业背景和课程地位,确定了《"干涉"现象》教学项目的教学目标,通过精心的教学设计和实施达到以能力培养为目的,以学生为主体,以训练项目为驱动较好地提升学生发现问题、解决问题的能力,合理进行模具设计的目的。     

The Reciprocal Relations of Pressure,Work/Family Interference,and Role Satisfaction: Evidence from a Longitudinal Study in Taiwan

The aim of this longitudinal study was to explore reciprocal relationships between work/family pressure, work/family interference, and work/family satisfaction among Taiwanese employees (N = 310). All study variables were assessed three times. We found that within the work domain, earlier work pressure caused later work‐to‐family conflict (WFC), while earlier WFC reduced later job satisfaction. We also found that earlier WFC caused later work pressure, while earlier job satisfaction reduced later WFC. Similarly, we found that within the family domain, earlier family pressure caused later family‐to‐work conflict (FWC), while earlier FWC reduced later family satisfaction. We also found that earlier FWC caused later family pressure. In addition, family pressure and family satisfaction had reciprocal relationships over time. Together these longitudinal and reciprocal relations strongly support our hypothesized feedback loops linking pressure, work and family conflict, and role satisfaction, within each of the work and family domains. We made specific suggestions on breaking these vicious cycles to effectively manage both the work and family roles.     

Group incentive compatibility for matching with contracts

Hatfield and Milgrom [Hatfield, John William, Milgrom, Paul R., 2005. Matching with contracts. Amer. Econ. Rev. 95, 913–935] present a unified model of matching with contracts, which includes the standard two-sided matching and some package auction models as special cases. They show that the doctor-optimal stable mechanism is strategy-proof for doctors if hospitals' preferences satisfy substitutes and the law of aggregate demand. We show that the doctor-optimal stable mechanism is group strategy-proof for doctors under these same conditions. That is, no group of doctors can make each of its members strictly better off by jointly misreporting their preferences. We derive as a corollary of this result that no individually rational allocation is preferred by all the doctors to the doctor-optimal stable allocation.     

20世纪80年代以来全球经济外部不平衡的调整:历史的视角

20世纪80年代以来全球经济外部不平衡发生了三次大的调整,每次调整的背景和方式不同。20世纪80年代美日之间的外部不平衡是通过高增长背景下刻意的货币制度设计来完成的,是一种"渐进"的调整方式。20世纪90年代东南亚国家外部不平衡的调整是在高增长背景下,由货币"错配"引发的组合投资逆转带来的以货币危机形式完成的,是一种"休克"的调整方式。而2006年以来至今的美国经济外部不平衡的调整是在金融危机加速全球经济急速下滑的背景下,更可能依靠实体经济总需求的下降来调整,将是一个相对缓慢的过程。     

总需求和总供给冲击对我国失业和产出动态关系的影响分析

在我国的失业产出关系中,短期内,总供给冲击是产出波动的主要来源,总需求冲击则是失业波动的主要来源,总需求冲击和总供给冲击共同破坏了产出失业之间反向变化关系,但是总需求冲击的破坏作用更多一些。在长期,总需求冲击对产出没有影响,总供给冲击对产出有显著的正的影响,总需求冲击在长期对失业没有影响,但总供给冲击在长期会对失业产生不利影响,即正的供给冲击的累积影响所带来的产出增加在长期使我国的失业率上升。     

中国地震损失分布与巨灾债券定价研究

中国是世界上遭受地震灾害损失最严重的国家之一,需要借鉴国际巨灾债券运作经验,进一步发挥保险业分散巨灾风险和补偿经济损失的作用。利用非寿险精算技术,将损失风险与利率风险理论模型相结合,对中国地震巨灾债券定价进行实证研究。结果表明:中国地震巨灾损失服从损失次数为泊松分布、损失额度为对数正态分布的聚合损失分布,通过与BDT无风险利率期限结构模型的结合,可以初步构建地震巨灾债券的定价模型并付诸实践。     

Sectoral Shocks and Metropolitan Employment Growth

In this paper, we study the sources of industry employment growth in each of five metropolitan statistical areas (MSAs). The objective is to understand the relative importance of aggregate disturbances versus local sectoral shocks in generating observed employment fluctuations at the MSA level. The empirical evidence presented in this paper derives from structural vector autoregressions (SVARs), estimated for each of the five MSAs. Estimations use monthly employment data covering nine one-digit industrial categories for the period 1951:1–1999:8, as well as two variables that capture the influences of aggregate (i.e., national) shocks on MSAs. We find that within-MSA industry shocks explain considerably more of the forecast error variance in industry employment growth than do aggregate shocks. Sectoral shocks account for between 87 and 94% of the 36-month-ahead forecast error variance. Among individual local sectors, shocks to MSA-specific government, manufacturing, and service sector employment growth are the predominate sources of variability.     

New membership function for poverty measure

Fuzziness in a fuzzy set is determined by its membership function (m.f) which translates the reality of a problem. Accordingly, the shapes of membership functions (m.fs) are important for a particular problem such as poverty since they effect on a fuzzy inference system. Some authors have used to visualize the behaviour of poverty, different shapes like triangular, trapezoidal. In this paper, a specific (m.f), named modified logistic membership function better illustrating the complicated reality, is proposed to measure poverty. The modified logistic membership function is first formulated for several states of poverty and its flexibility in taking up vagueness in poverty is established by an analytical approach using aggregate operators in order to infer a logical conclusion measuring poverty. An application based on individual well-being data from Tunisian households in 2010 is presented to illustrate use of proposed concepts.