斑点鳟鲑孵化及仔鱼生长和存活的温度效应研究

本研究试验不同温度(6、8、10、12、14℃)对斑点鳟鲑受精卵孵化速度、孵化率、生长速度与仔鱼死亡尾数的影响,以期对养殖户提供技术支撑。结果表明:6℃水温孵化,虽然仔鱼死亡尾数较少,但受精卵孵化率低,孵化速度和仔鱼生长速度慢;14℃水温孵化,受精卵孵化率高、仔鱼生长速度快,但仔鱼畸形率高,仔鱼死亡尾数较多。通过对比斑点鳟鲑的适宜孵化温度为8-12℃,最佳孵化温度为10℃,仔鱼最佳生长温度为12℃。     

职业延迟满足对员工过劳的影响研究——职业成长机会的调节作用

目前,员工过劳问题在我国企业发展中日益凸显,需要予以重视和解决。基于个体与组织互动角度,通过对338名企业员工的问卷调查分析职业延迟满足和职业成长机会对员工过劳的影响,并检验职业成长机会对职业延迟满足影响员工过劳的调节作用,结果表明：职业延迟满足的两个维度（工作延迟满足和职业生涯延迟满足）均对员工过劳有显著正向影响,而职业成长机会对员工过劳有显著负向影响;职业成长机会对职业延迟满足影响员工过劳具有负向调节作用,即职业成长机会越大,职业延迟满足与员工过劳的正向关系越弱。因此,企业管理者应合理引导和帮助员工做好职业生涯规划,为员工提供合适的多元化发展通道,以有效预防和缓解员工过劳。     

高肥料投入条件下不同污泥用量对油菜生长及品质的影响

通过盆栽试验,研究高肥料投入条件下,不同污泥施用量对油菜生长及品质的影响。试验设计为不施肥空白对照（CK）、常规施肥（CF）、施用城市污泥减量替代磷肥（SL1）、施用城市污泥等量替代磷肥（SL2）、施用城市污泥高量替代磷肥（SL3）5个处理,重复4次。研究结果显示,适宜的污泥用量可以显著提高油菜产量和根重,并能降低植株体内硝酸盐含量,污泥处理较常规施肥处理产量增加10.12%~55.36%,地上部植株硝酸盐含量降低10.39%~20.57%。但在提高油菜还原型Vc、全氮、全钾含量方面效果不明显。     

Entrepreneurial innovativeness and growth ambitions in thick vs. thin regional innovation systems

Research in economic geography has paid increasing attention to regional innovation systems (RISs) as a potential vehicle for growth and development. Yet despite an increasing amount of research studying RISs in particular and economic regions in general, we have limited knowledge about their influence on entrepreneurs and entrepreneurship. We respond to this knowledge gap and study if entrepreneurs’ localization in thick vs. thin RISs affects their innovativeness and growth ambitions. Thick RISs are predominately urbanized spaces that include organizations of higher-level education, R&D intensive milieus, and an ample industry sector, while thin RISs to a lesser degree encompass these features. Empirically, we analyse 870–917 entrepreneurial firms in Agder of Southern Norway. Based on trade and labour markets, as defined by the EU’s classification of local administrative units (LAU1), we identify two thick and six thin RISs in Agder. Econometric analyses show that entrepreneurs located in thick RISs are more innovative than entrepreneurs located in thin RISs, but there are no significant differences concerning entrepreneurs’ growth ambitions. In light of our findings, we discuss the potential agency role played by entrepreneurial firms at a micro level on path dependent features of RISs at a macro level.     

Being Good Parents or Being Good Citizens: Dilemmas and Contradictions of Urban Families in Middle‐Class Enclaves and Mixed Neighbourhoods in Germany

In recent years, cities have become ever more attractive to middle‐class families. On the one hand, middle‐class families tend to withdraw into (often newly built) socially homogeneous middle‐class neighbourhoods. On the other hand, they are also known to move into inner‐city and socially mixed areas, thus triggering processes of gentrification. Academic literature has often denounced these housing choices as being either ‘separatist’ or ‘revanchist’, more broadly categorized as strategies of ‘middle‐class disaffiliation’. Although there is a grain of truth in these interpretations, the reality is certainly more complicated. In our research on middle‐class parents’ housing and neighbourhood choices as well as their patterns of neighbourhood use, carried out in each of the two types of residential area mentioned above, we have only very rarely found an explicit desire to draw boundaries that exclude those ‘beneath’ them. We rather argue that the housing choices and neighbourhood‐related activities of middle‐class family households are heavily influenced by the specific dilemmas the interviewees face as (working) urban parents. While a significant number of respondents worry about the social sustainability, justice and cohesion of urban society, they are also concerned about the future prospects of their children. Many find it difficult to reconcile these conflicting normative demands under the prevailing circumstances.     

产业转型、就业结构调整与收入分配

本文通过对比中国非农就业的行业分布和收入增长1995—2013年期间四个时间点上的情况,用布朗分解方法分析了收入增长的原因,重点考察了行业分布变化所代表的产业结构调整对收入增长的贡献作用。研究结果表明,中国劳动收入增长的主要原因是市场化改革所带来的收入机制的完善,低技能劳动力的大量供给使中国产业结构向低技能低收入的方向倾斜发展,这不利于整体收入的增长和分配。近年来产业转型对收入增长的贡献作用开始加强,这会成为新时期中国劳动收入的新增长点。     

我国东西部城市旅游的差异分析

城市是区域发展的核心与枢纽 ,城市旅游的发展状况影响着区域旅游发展的结构、规模和水平。本文从我国区域旅游发展不平衡的现状出发 ,从城市化水平、旅游整体水平、旅游空间结构、旅游产品与模式等方面分析了东部和西部城市旅游的差异。为西部旅游开发提供了一定的参考。     

中国城市化水平测定研究综述

城市化水平测度的方法主要有两种 :主要指标法和复合指标法 ,而人口比例指标则又是主要指标法中最常用的城市化测度指标。文章回顾了我国城镇人口统计口径的历次演变 ,阐明了其中存在的主要问题 ,综合论述并评价了国内学者对这些问题的解决办法 ;同时进一步讨论了对其它主要指标法和复合指标法的研究 ,分析了存在的缺陷。     

中国城市发展的科学问题

本文概述了城市发展与城市科学的形成,中国城市化与中国城市科学的发展,中国城市发展的机遇与挑战,城市科学研究的"中国学派"等问题.     

城乡整体生长空间的规划建设策略

提出城乡整体生长空间的规划理念,以此来指导城乡空间的整合.同时强调,城乡空间的整合,不仅仅是城乡空间资源的共享和空间发展上的协调,还应注重城乡生态系统的互补与整体保护,注重城乡经济的共同繁荣、社会的共同进步,并为此从规划建设策略上进行了探索.