微波加热对叶绿素水溶液的影响

本文通过对叶绿素水溶液进行微波加热,分析微波加热对叶绿素水溶液的温度、色度、叶绿素含量的影响。结果表明,微波加热处理的水溶液温度显著高于对照沸水浴,1~2 min时,1000 W功率下的水溶液温度显著高于200 W(P<0.05)。与沸水浴相比,微波加热显著降低了叶绿素水溶液的绿色程度,且高功率微波加热显著加剧了水溶液亮度的变化。200 W微波加热使水溶液中叶绿素a、b含量降低,但1000 W微波加热则提高了水溶液中叶绿素a、b含量。     

Measuring agricultural knowledge and adoption

Understanding the tradeoffs in improving the precision of agricultural measures through survey design is crucial. Yet, standard indicators used to determine program effectiveness may be flawed, and at a differential rate for men and women. We use a household survey from Mozambique to estimate the measurement error from male and female self‐reports of their adoption and knowledge of three practices: intercropping, mulching, and strip tillage. Despite clear differences in human and physical capital, there are no obvious differences in the knowledge, adoption, and error in self‐reporting between men and women. Having received training unanimously lowers knowledge misreports and increases adoption misreports. Other determinants of reporting error differ by gender. Misreporting is positively associated with a greater number of plots for men. Recall decay on measures of knowledge appears prominent among men but not women. Findings from regression and cost‐effectiveness analyses always favor the collection of objective measures of knowledge. Given the lowest rate of accuracy for adoption was around 80%, costlier objective adoption measures are recommended for a subsample in regions with heterogeneous farm sizes.     

兵团农业产业结构调整与新疆生态安全——以农十三师红星四场为例

农业产业结构调整对兵团经济发展与新疆生态安全具有重要影响。改革开放以来,新疆生产建设兵团农十三师红星四场在传统农业结构的基础上,根据市场需求调整种植业结构,发展果蔬园艺业;退耕还牧,鼓励家庭养殖业,合理发展畜牧业;稳定发展防护林,大力发展特色经济林果业,农业产业结构得到合理的调整。以农十三师红星四场为代表的兵团农业产业结构调整,改善了绿洲农业的生态系统,对新疆生态安全产生了积极影响。     

隆朋复合麻醉制剂对山羊麻醉效果的研究

本试验应用隆朋复合麻醉制剂对山羊麻醉效果进行观察,通过对麻醉山羊的体温、呼吸频率、心率变化及各项生物反射的监测,评价隆朋复合制剂对山羊麻醉效果。结果表明,隆朋复合制剂对山羊具有麻醉起效快、麻醉维持时间长、镇静确实、镇痛充分、肌松完全,可满足山羊临床麻醉的需求。     

中国农村居民区域收入不平等的变动与分解——基于生产要素角度

本文采用1988-2005年农村居民收入省级面板数据,应用方差分解技术,将农民区域收入不平等分解为各生产要素和全要素生产率的贡献。研究发现,对农民区域收入不平等扩大贡献由大到小的顺序是：物质资本〉人力资本〉全要素生产率〉土地,因此,政府要平抑日益加剧的农村区域收不平等,从加大对中西部地区的物质资本投资入手将效果显著。     

移民村庄自组织现象成因探析

自组织现象是移民村庄及其有活力的前提，不仅有利于村庄形成有序的结构，同时有利于村庄稳定和可持续发展，自组织理论认为，只有系统具有开放性，非平衡性和非线性，才具备产生自组织现象的条件，本文认为，移民新村的建设要通过产业发展，人员流动和人际交流保持其系统的开放性；要通过移民地区选择和移民构成的控制，维持一定势差，以保持其非平衡性；通过移民要素的配置，促进非线性关系的形成，只有这样，才能促进移民新村自组织现象的产生，使其受到内，外涨落的随机启动，进而产生出集体运动的协同效应，如果忽视了这些条件，移民新村就难以获得活力。     

Unfolding China’s state-owned corporate empires and mitigating agency hazards: Effects of foreign investments and innovativeness

Integrating agency and institutional perspectives, we describe how China’s socio-political institutions create state-owned corporate empires with unique agency conflicts. We develop a framework demonstrating how economically unjustified firm expansion, i.e. empire building, mediates the relationship between state ownership and performance. We uncover the instrument in empire building and appropriate corporate governance and strategic management remedies. An empirical study on 29,638 Chinese firms evidences that (1) increased state ownership drives higher management expenses and lower firm profitability though empire building; (2) long-term debt is used to finance empire building; and (3) foreign capital investments and innovativeness can mitigate these agency conflicts.     

A Hierarchical Clustering Approach Based on Three-Dimensional Gray Relational Analysis for Clustering a Large Group of Decision Makers with Double Information

Two types of information, collectively referred to as double information, are usually required in management decision-making. The first is preference information expressed in a judgment matrix. The second is reference information expressed in a multi-attribute decision matrix. In this paper, we investigate large-scale group clustering problems with double information in group decision-making. We first establish a novel three-dimensional gray correlation degree index, which integrates the alternative decision-making vector, index vector and alternative preference vector, to fully excavate the correlation between decision makers with double information. We then develop a new clustering procedure combining three-dimensional gray relational analysis and the concept of hierarchical clustering. Moreover, a model for determining clustering centers is established on the basis of the maximum gray correlation degree within each cluster and minimum gray correlation degree among clusters. A heuristic algorithm for the model to identify the core decision maker in each cluster is proposed. Finally, we illustrate the applications of the developed procedures with a practical case. The rationality of the proposed method is demonstrated by comparing results with results obtained using other methods, including the traditional gray clustering method and hierarchical clustering method with single information; i.e., preference information or reference information.     

Offshore RMB Market Sees Robust Growth

【正】Thanks to China’s continued efforts in deepening financial reforms,the offshore RMB market has continued to expand rapidly,as revealed by a recent report by ...     

2015年中国国际游乐设施设备博览会行业巨头云集 都是市场惹的“祸”

3月18日至20日,由中国游艺机游乐园协会主办的2015年中国国际游乐设施设备博览会在北京国家会议中心迎来第25届国际游乐行业盛会。本届博览会展出面积达2.35万平方米,共有世界各地的310多家游乐设施制造厂商参展,并吸引了专业观众、投资商、采购商两万多人,意向成交额达200亿元。市场热驱动世界著名的主题公园纷纷进入中国,迪斯尼乐园、环球影城、六旗乐园、乐高乐园、乐天世界等相继在中国建设主题公园。中国文化旅游市场巨大,主题公园成投资热点。