农村劳动力转移对化肥面源污染的影响研究以冀鲁豫3省为例

[目的]以冀鲁豫3省45个地市为研究对象,分析农村劳动力转移对化肥面源污染的影响,为实现农村劳动力转移与绿色农业的协调发展提供对策建议。[方法]文章选取2004—2016年冀鲁豫3省地市数据,厘清了农村劳动力转移的动态演进轨迹和化肥面源污染的时空分布格局,采用空间杜宾模型分析了农村劳动力转移对化肥面源污染的直接影响和空间溢出。[结果] 2004—2016年冀鲁豫3省农村劳动力转移率总体表现为提升趋势,但增速有所放缓,区域差异不断增强;化肥面源污染排放强度具有明显的空间集聚特征,从高到低依次为山东、河北、河南,总体排放强度略有下降,表现出由东北向西南转移的演进趋势;农村劳动力转移对化肥面源污染具有正向的直接影响和空间溢出,且间接溢出大于对该市造成的直接影响,农村劳动力转移的快速推进会把化肥面源污染"转嫁"给邻近地市。[结论]不同地区应合理引导农村劳动力流动,缓解农村劳动力转移过快带来的污染"转嫁",统筹协调、协同治理化肥面源污染。     

氧化微晶蜡生产的技术经济分析

简要介绍了微晶蜡氧化工艺及氧化微晶蜡产品特点，并对其进行了初步经济评价，同时对氧化微晶蜡下游产品如防锈蜡，乳化蜡及塑料润滑用蜡等进行了市场分析，最后给出了氧化微晶蜡下游产品生产的若干建议。     

农村人口流动与城乡收入差距关系研究

农村剩余劳动力转移对城乡收入差距是否有显著影响，影响多大？为研究此问题，本文在新古典人口流动模型的基础上，结合我国具体国情构建了中国特色的人口流动模型。在此基础上，通过协整分析验证了农村剩余劳动力的转移与城乡收入差距之间的长期均衡和短期动态关系。研究结果表明短期内农村剩余劳动力的转移不能消除城乡差距，但对缩小我国城乡收入差距发挥巨大效应。     

中国货物贸易出口量的影响因素--基于引力模型的极值边界分析

对外贸易是拉动经济增长的三驾马车之一,我国出口贸易对经济的增长作用一直非常显著,因此对贸易出口量影响因素的深入研究十分必要。本文依据国际贸易理论,对贸易“引力模型”进行扩展,引入极值边界分析方法（Extreme Bounds Analysis , EBA ）,采用2003～2012年省际区域面板数据,对我国货物贸易出口量的影响因素进行实证检验,得出的结论是各省外商直接投资、进口额、工业产值、固定资产投资、税收收入、最终消费是我国货物贸易出口量的“稳健性（Robest ）”影响因素,并据此提出促进对外贸易发展相关政策建议。     

Chemical Fiber： Better lhan Expected

According to China Chemical Fiber Industry Association, during the first half year of 2014, China＇s chemical fiber output has been keeping steady, the benefit has been turning better in comparison to the first quarter of this year, the new production of polyester amounted to 2.62 million tons, upstream suffered imbalance between supply and demand, and some large enterprises have been afflicted with capital chain issues etc. The association forecasts annual production will reach 43500 thousand tons, up by 6% roughly, the gross profit will increase over last year and the operational quality will improve.     

GoTex Show is Going on in 2014

GoTEX Show - International Trade Fair for Textiles in 2013
The ＂GoTex Show - International Trade Fair of Textile Products＂ had its first edition held on October 23-25, 2013 in $5o Paolo Anhembi Exhibition Cen- ter, S~o Paulo, and exceeded expectations bringing together 320 exhibitors from China, Brazil, Taiwan, Hongkong and Italy, as well as more than 5000 visitors from over 32 countries and regions. The Fair covered an exhibition area of 7,200 square meters, which was divided into fabric, home textile, and garment sections.     

Intelligence in Textile Machinery Industry

The development of textile machin- ery industry, at present, is in dilemma to some extent. For instance, the amount of newly-commenced projects is on the decline, which witnessed a year on year decrease by 0.96% in the past half year of 2014. It can be attributed partly to the rising cost of labor and raw material, and thus the product prices cannot be as pleased as before. In this manner, many small enterprises have difficulty in find-ing clients, only to have rising stocks. Therelbre, they are obliged to have more days off as to tion. It may be is due partly to ing market. maintain tile deduced that daily opera- this dilemma the neglect of the changing market.     

碳排放约束视角下产业智能化对区域经济差距的影响研究

本文利用2003~2019年中国省级面板数据,从碳排放约束视角出发,实证考察了产业智能化对区域经济差距影响的差异性和产业智能化影响区域经济差距的机制。研究表明,产业智能化对缩小全国、东、中和西部地区省域间经济差距具有显著的正向效应;进一步考虑碳排放约束,发现碳排放约束正向调节了产业智能化对区域经济差距的正向效应,西部地区由于自身产业结构和区位因素,抑制了产业智能化对区域经济差距的正向效应;最后,对产业结构升级的两个子维度在产业智能化和区域经济差距间的中介效应检验,发现产业结构升级的中介效应存在,且主要是通过产业结构高级化实现,产业结构合理化发挥的作用较小。     

Box-Behnken响应面法优化徐长卿配方颗粒挥发油-β-CD包合物制备工艺

为了解决徐长卿挥发油加油难及加入后的稳定性问题,采用Box-Behnken响应面法,优选出徐长卿配方颗粒挥发油-β-CD包合物的制备工艺。在单因素试验的基础上,采用3因素3水平Box-Behnken设计对徐长卿配方颗粒挥发油-β-CD包合工艺进行优选,以挥发油包合率及包合物收率为考察指标,考察挥发油与β-CD比例、包合温度、包合时间对结果的影响。结果表明:优选的包合工艺条件为挥发油与β-CD质量比为1∶8.34,包合温度为50.2℃,包合时间为2.17 h。在此条件下,挥发油包合率为72.19%,包合物收率为75.06%,综合评分为96.41,RSD值为1.1%。优选的包合工艺包合率高,工艺稳定可行,可为配方颗粒挥发油的工业化生产提供数据支持。     

Do ongoing networks block out new friends? Reconciling the embeddedness constraint dilemma on new alliance partner addition

Research Summary: This study addresses a theoretical dilemma regarding how alliance network constraint (reflected by network cohesion) affects a firm’s alliance formation with new partners. Using a network pluralism approach, we separate a firm’s ego alliance network into two activity‐based networks—an exploratory network and an exploitative network—based on the primary value chain activity involved in each alliance. We argue that the cohesion of exploratory or exploitative networks has an inverted U‐shaped effect on the addition of new partners in the same activity‐based network, and a positive effect on the addition of new partners in the other network. Results based on data from the biotechnology industry largely support our predictions with one exception. Our study contributes to both scholarly understanding of network embeddedness and alliance practice. Managerial Summary: The structure of firms’ ongoing alliance networks may have paradoxical implications for their efforts to search for and form alliance with new partners. That is, when a firm’s alliance partners are tightly connected with each other, the cohesive network tends to both encourage and impede the focal firm to add new partners. We resolve this dilemma by showing that when a firm is deeply entrenched in a cohesive alliance network conducting a certain type of activities (e.g., R&D activities), it may not easily add new R&D alliance partners. However, it may still be able to escape from the cohesive R&D alliance network by seeking new partners conducting other activities (e.g., manufacturing activities).