试析西北地区的资源优势,人口问题与环境形势

以西北地区为空间范围，系统揭示了其突出的资源优势，探讨了独特的人口问题，分析了其严峻的环境形势，提出了解决的对策。     

地面风传感器加热装置设计及试验研究

在冬季雨雪、冻雨、雨凇和雾凇等天气现象发生时,自动气象站风传感器转动部件容易发生冻结,造成风向风速观测数据缺测。为解决风传感器冻结的问题,设计一种基于分级加热技术的风传感器加热装置,采用多级加热元件组合控制的方式,实现自适应启动不同级别的加热模式。通过试验对风传感器加热装置性能进行测试,以及对风向风速观测数据进行处理分析,评估风传感器加热装置在气象观测业务中应用的可行性。结果表明,带有加热装置的风传感器起到了很好的防冻结作用,运行更加稳定;带有加热装置的风向风速数据完整性优于未带有加热装置的风传感器,两者风速具有较强的相关性,相关系数均在95%以上;两者风向一致性显著,均在80%以上,十分钟风向一致性优于两分钟风向一致性。可见,风传感器加热装置可有效减少风传感器冻结发生的次数,及时消除结冰层,降低观测人员设备维护工作量,提高风传感器运行的稳定性和数据的连续性,为风传感器加热装置应用于气象观测业务提供决策支撑。     

基于收益长期相关的风险度量及投资期限效应

在资产收益具有长期相关性的框架下,从序列可预测性的角度将风险定义为实际与预测结果的偏差;认为该风险能够用序列中的噪声进行度量。在此基础上,还以不同抽样间隔的上证综合指数收益序列对风险度量的投资期限效应进行了考察。     

Pricing Strategies in a Supply Chain with Multi-Manufacturer and a Common Retailer Under Online Reviews

Online reviews play an important role in consumer purchasing behavior when shopping online, and in turn affect pricing strategies of sellers. We consider a supply chain consisting of three competitive manufacturers and an e-tailer, which sells multiple substitutable products procured from different manufacturers. Considering reviews in terms of quality information and fit information, we study the effect of online reviews on consumers’ purchasing decisions as well as pricing strategies of manufacturers and the e-retailer. Through modelling customer choice with online reviews based on neo-Hoteling model and solving Stackelberg game composed by manufacturers and e-tailer, we obtain the optimal equilibrium prices of manufacturers and the e-tailer. And we distinguish two kinds of effect from online reviews: effect of the opinion bias in product quality and effect of the match informativeness. Furthermore, compared to the case without online reviews, we find online reviews improve a manufacturer’s optimal wholesale price, profit as well as the retailer’s optimal retailing price, when the adjusted quality revealed by reviews is high; however, online reviews can improve the e-tailer’s optimal profit, only when the standard deviation of products’ quality revealed by reviews is large enough. Last, we get that the increase of competing manufacturers’ quantity would change the dominance between two kinds of effect from reviews on supply chain members.     

自旋空间群的推导

说明了自旋-空间群的结构关系，并举例说明自旋-空间群的推导。     

地基稳定性的广义粘塑性分析

通过增广拉格朗日法将广义粘塑性引入极限分析，对土质地基的稳定性进行模拟。     

测井多井解释技术在克拉玛依砾岩油藏水淹层评价中的应用

根据克拉玛依油田砾岩油藏的地质特点，以测井资料为依据，结合取心、岩电、测试等分析资料，应用测井多井解释技术，建立了克拉玛依油田二中区砾岩储层参数解释模型，进而评价该油田二中区、二西区和红山嘴区块的砾岩水淹层。水淹级别按六级划分，其综合符合率达８０％以上，解决了水淹层的精细描述问题，为高含水期老油田增储挖潜、控水稳油、提高采收率，提供了确切的依据。     

Discovery of dinoflagellates from the Dengshan Group in NE Jiangxi Province and its significance

From the stratotype section of the Bazhukeng Formation, Dengshan Group (formerly assigned to the late Proterozoic), situated at Dengshan Village, Zhujia, Yiyang County, Jiangxi Province, three dinoflagellate-bearing horizons have been found, in which the lower two contain ?Conochitina sp. andCyathochitina sp., while the upper yields ?Conochitina sp. and ?Rhabdochitina sp., which testifies that the stratigraphic units concerned belong to the early Paleozoic in age. Such a discovery is significant for re-ascertaining the age of the “Banxi Group” in South China, and the tectontc namework and its evolution.     

Effect of sinter layer porosity distribution on flow and temperature fields in a sinter cooler

When sinters are filled into the sinter cooler from the sintering machine, it is commonly seen that, due to segregation effects, sinters of larger size usually accumulate closer to the inner wall of the sinter cooler, whereas those of smaller size are to the outer wall. This nonuniform distribution of sinters has led to uneven cooling effect throughout the cooler. This causes the sinters leaving the cooler at a large temperature difference. This undesired temperature difference leads to the deformation and even the destruction of the conveyors. The computational fluid dynamics (CFD) technique was used in the present work to investigate the heat and fluid flow phenomena within the sinter cooler corresponding to the different distribution of sinter layer porosity, which was highly dependent on the arrangement and orientation of sinters within the sinter cooler. It is confirmed that a high mass flow rate within the sinter layer causes a low temperature region and vice versa. The flow fields for vertically reducing porosity distribution and random distribution are almost identical indicating the relative insignificance of convective heat transfer mechanism.     

在综合性高校中开展灾害卫生学课程教学效果评价与分析

目的:了解综合性高校开展灾害医学教育的效果,为课程的教学改革提供科学依据。方法:利用问卷调查的方式对选修了灾害卫生学课程的医学类和非医学类学生进行调查。结果:2010—2013年选课人数分别为112、120和120人,有98.9%的同学认为该门课程值得学习,其中31.2%的人认为该门课程非常值得学习;学生对灾害卫生学教材的使用普遍反映较好,94.9%的同学认为选用的教材和参考资料很有价值,值得使用;23.9%的同学认为使用本版教材非常好;176个被调查的选课同学中,71.6%人认为老师授课有激情,教学效果非常好;73.9%的同学认为教学内容先进,信息量大;54.5%的人认为课内外容易与老师进行多种形式的交流。结论:该门课程的选课率较高,大学生已经认识到了灾害医学知识教育的的重要性和紧迫性,高校应该积极开展灾害医学的教育。