Spatial and temporal analyses of potential land use conflict under the constraints of water resources in the middle reaches of the Heihe River

With the rapid urbanization in China, land resources are becoming increasingly scarce. Identifying and resolving land use conflict is essential for reasonably using land resources and achieving land sustainability. Taking the middle reaches of the Heihe River as an example, we included the constraints of local water resources to construct a multi-criteria evaluation system for assessing land use competitiveness in 2000 and 2015 based on land use, socio-economic, and nighttime light data. By comparing the competitiveness of cultivated land, construction land and ecological land, we then derived the spatiotemporal patterns of potential land use conflicts. Actual land use changes supported the hypothesis that land use tended to convert into the type with higher competitiveness at areas with intense conflict, which better indicated that our assessment model was effective. The results showed that the potential land use conflict was more acute in the central and northwest but weak in the southeast and northeast, and its pattern showed a significantly positive spatial autocorrelation. The conflict between cultivated land and construction land was most prominent and mainly occurred in the transitional zone from urban to rural areas. Rapid urban development and water shortage were the main causes of the potential land use conflict. Assessing land use multi-functions and making a tradeoff among ecological, economic, and social services will be an effective way to guide future land use to solve land use conflict. Our research provides scientific evidence for sustainable land use planning and management in the arid areas.     

内蒙古黄河干流跨盟市水权试点研究

为了全面总结内蒙古自治区水权试点工作,介绍了内蒙古黄河干流跨盟市水权试点过程中强化行业监管方面的一些做法,总结了试点过程中坚持问题导向、坚持两手发力、强化节水管理、创新体制机制的一些重要经验。     

Effects of consumer cohorts and age on meat expenditures in the United States

Meat demand is likely influenced by the birth cohort and age of the individual. In this study, we examine the demand for beef, pork, poultry, and other meat in the United States using the 1984–2012 Consumer Expenditure Survey and the almost ideal demand system with the incorporation of age, period, and cohort (APC) effects. We find that the model with APC effects performs better than the models without APC effects. The results indicate that cohorts born in earlier time periods are expected to purchase significantly less poultry compared to cohorts born in later time periods, when they are measured at the same age. Over the life cycle, purchase of poultry is expected to increase with age while the opposite is true for red meat. We also find that the own-price elasticity for beef is highest among the products examined, while the own-price elasticity for other meat is lowest and the inclusion of APC effects increases the absolute value of the own-price elasticities for beef, pork, and poultry, but reduces the own-price elasticity for other meat. Our forecasts indicate that the aggregate poultry purchase will continue to increase until 2022, while the aggregate purchase of red meat will slightly increase until 2017, but will either decrease or stay at same level from year 2017 to 2022.     

汇水系统绿地雨洪调蓄研究——以武汉港西汇水系统为例

绿地有一定的雨洪调蓄功能，雨洪状况下，如何在汇水系统尺度利用和保护绿地亟待研究。选取95处位于武汉港西汇水系统的地块，调研地块性质，利用ArcGIS提取不透水比例及平均坡度，并进行SWMM水文模型演算。通过实验性模拟结果的对比，得出汇水系统的绿地雨洪调蓄效率(λ＝0.13m3/m2)、汇水系统(g＝36%)和各类用地(g＝18%～47%)基于雨水调蓄理念下的最低绿地率，使汇水系统水文状况达到海绵城市建设标准。讨论了不同重现期下汇水系统的绿地雨洪调蓄效能，旨在完善绿地雨洪调蓄的研究方法、指标体系及利用与保护策略，为相关研究与实践提供借鉴。     

内部控制、僵尸企业与审计特征

以2010—2017年深沪两市全部A股上市公司为研究样本，分析僵尸企业的审计特征并探讨内部控制对两者关系的调节效应。研究发现：相比于非僵尸企业，僵尸企业具有倾向于支付更低的审计费用、更有可能收到非标意见和更有可能选择非高质量审计师进行审计的特征，同时，僵尸企业内部控制环境更差。进一步研究发现，更高的内部控制质量使得僵尸企业更有可能收到标准无保留的审计意见，但非僵尸企业审计收费更高且更有可能选择高质量审计师。基于产权性质的进一步研究发现：（1）国有僵尸企业支付更低的审计费用，且中央国企支付的审计费用更低；（2）民营僵尸企业更有可能收到非标审计意见；（3）民营僵尸企业和地方国有僵尸企业更有可能选择非高质量审计师进行审计，且地方国有僵尸企业倾向性更强。从公司治理角度研究僵尸企业的审计特征，为识别僵尸企业提供了经验证据。     

推动国有企业廉洁文化建设,以文化自信坚定理想信念

习近平总书记在党的十九大报告中指出:“没有高度的文化自信,没有文化繁荣兴盛,就没有中华民族伟大复兴。”廉洁文化建设是反腐倡廉工作的重要内容,是一项长期的、艰巨的、复杂的系统工程。论文结合福建省三钢(集团)有限责任公司在开展廉洁文化建设工作中的工作实践,对廉洁文化在企业发展中的重要意义、存在的问题及有效运用进行了分析与探讨,对推进廉洁文化进国企具有较为积极的指导意义。     

A股“垃圾股”退市难的原因及对策分析

退市难一直是A股的难题,退市率极低。由于退市制度设计缺陷、IPO非市场化及监管不到位等原因,致使“垃圾股”的“壳”价值高,上市公司保“壳”冲动高。在当前IPO加速的背景下,科学合理地提高退市率,积极完善退市制度,使A股形成“有进有出”的良性生态环境是亟待解决的问题。     

基于物联网技术的智能交通控制系统研究

作为物物相连的互联网,物联网通过信息传感设备,把互联网与任何物品相连接,为构建智能交通信号控制与采集的体系提供了可能。论文从基于物联网的智能交通系统整体框架入手,并着重分析其在交通控制和信号采集两个子系统中的运用,指出物联网技术将全面提升交通管理水平。     

中国特色社会主义市场经济货币政策体系的形成及演变*

伴随中国特色社会主义基本经济制度的发展，与之相适应的宏观调控机制不断完善。货币政策体系作为其中重要组成部分，在持续深化改革的进程中逐渐演进，成为构建更加系统完备、更加成熟定型的高水平社会主义市场经济体制的重要内容。在货币政策最终目标及中间目标、货币政策工具、货币政策传导机制等方面正在形成与中国特色社会主义基本经济制度相适应的政策体系，并且具有鲜明的中国特色。本文讨论改革开放以来中国货币政策体系的形成、演变过程及特点。     

新发展阶段与建立现代财税体制*

本文基于我国即将进入全面建设社会主义现代化国家新征程的新发展阶段，回顾了党的十八大以来的财税改革经验，锚定“十四五”规划和2035年远景目标，研究了新发展阶段对深化财税体制改革的要求，从深化预算体制改革、理顺央地财政关系、提升现代税收治理、健全债务管理制度、推进财税法治建设五个方面把握中国特色现代财税体制发展，持续为建立现代财税体制提供理论佐证。