切线模量法确定强夯地基承载力的现场试验研究

平板载荷试验是检验强夯加固填土地基承载力的重要手段，基于平板载荷试验的切线模量法以安全系数和允许沉降两个控制因素结合Terzaghi极限承载力理论可计算不同沉降要求的地基承载力。为了验证切线模量法计算强夯地基承载力的可行性和优越性，对现场填土地基进行强夯加固后进行平板载荷试验和超重型动力触探试验，以三组[WTBX]平板载荷试验9个试验点的测试结果为基础，反演该地基土性参数并通过切线模量法绘制p s曲线，发现切线模量法计算的p s曲线与现场p s曲线能够很好的吻合，故可用切线模量法计算基础中心不同沉降量所对应的地基承载力,且能够弥补平板载荷试验和动力触探测试方法的不足，故为浅基础的设计提供了一条新的途径。     

Testing for parameter constancy in the time series direction in panel data models

We propose tests for parameter constancy in the time series direction in panel data models. We construct a locally best invariant test based on Tanaka [Time series analysis: nonstationary and noninvertible distribution theory. New York: Wiley; 1996] and an asymptotically point optimal test based on Elliott and Müller [Efficient tests for general persistent time variation in regression coefficients. Rev Econ Stud. 2006;73:907–940]. We derive the limiting distributions of the test statistics as T→∞ while N is fixed, and calculate the critical values by applying numerical integration and response surface regression. Simulation results show that the proposed tests perform well if we apply them appropriately.     

Pollutant Ground Concentrations of Nonneutrally Buoyant Particles

A methodology is suggested for the estimation of the mass density and the cumulative ground deposition of a nonvolatile, nonneutrally buoyant, air pollutant (liquid or solid) released from a polluted column (following an explosion caused during routine operation in, e.g., the chemical industry or due to any kind of hostile act) and deposited on the ground via gravitational settling. In many cases, the deposited mass due to gravitational settling constitutes a significant fraction of the original inventory released from the source. Implementation of the methodology in preliminary risk assessments can serve as an efficient tool for emergency planning for both immediate and long‐term measures such as evacuation and decontamination. The methodology considers, inter alia, an estimation of the critical particle diameter, particle size, and mass distributions along the polluted column. This methodology was developed to apply in rural regions since proper application of relevant meteorological input data can be accomplished mainly for such areas.     

A monte carlo evaluation of response surface analysis based on paired-comparison data

The use of the logit transformation on paired-comparison data in the weighted least squares analysis of response surfaces for aesthetic qualities of products is discussed. Monte Carlo simulations are employed to investigate the small sample properties of the estimators and test statistics. A secondary objective of the Monte Carlo simulations is the comparison of two transformation procedures. The simulations are of standard-item paired-compar-ison experiments in which ties are not allowed.     

Plans for blocking and fractions of nested cube designs

Plans for implementing nested cube designs invoiving 3 to 5 factors within moderate sized blocks are eveloped. Fractionsc of 1/2 and 1/4 replicates of components of the generic design are used. Suggestions for data analysis are offered.     

对一个撒拉族移民乡村的民族学调查

世居于青海省循化县的少部分撒拉族从20世纪30年代开始陆续迁居该省乌兰县希里沟地区,逐步形成柴达木盆地第一个撒拉族移民村落。文章在民族学田野工作的基础上,反映了该村人口迁移、婚姻家庭、教育、宗教及经济文化类型的变化等基本情况。     

丝绸之路陇右段粟特人踪迹钩沉

中古时期,中亚粟特人沿着丝绸之路不断东来入华。学界对东迁粟特人及其后裔的聚落分布做过系统梳理,但对陇右段粟特人考论不多,造成了丝绸之路粟特聚落分布在研究上的断裂缺环。陇右东去关中,西通河西、青海,南下蜀中,北达宁夏,是交通枢纽之地,也是粟特人流动经行的必由之所。传世史籍、出土墓志、墓葬文物、石窟题记、敦煌文献及其他各种文物中保留了一些陇右地区粟特人的相关信息,反映出他们在天水、陇西、兰州、河州、成州、西平、廓州等地的聚落分布与生活状况。在这些地方,粟特人及其后裔或定居或经行,或贸易或任官,甚至形成军事武装聚落,也形成了陇西米氏、西平曹氏等郡望,他们成为陇右民众的有机组成部分。     

浅埋大跨黄土隧道下穿公路方案比选

以大跨黄土隧道下穿公路安全施工为背景,对隧道下穿公路的安全施工方案进行研究。基于公路路面破损指数与下穿公路施工风险事件引起路面最大沉降之间的关系确定了隧道下穿施工可能引起的路面最大允许沉降量,并据此制定出施工管理基准,对比分析了CRD和CD法引起的隧道拱顶沉降、地表最大沉降、支护受力和隧道周边地层塑性区特征,建议采用CD法进行下穿施工。下穿孙辛路施工监测结果表明,采用CD法保证了隧道施工安全和孙辛路的正常通行。     

论完善中国——东盟自由贸易区争端解决机制——以比较研究为视角

区域经济合作是目前世界经济中一个极为重要的发展模式,其中,中国与东盟之间的合作更是发展迅速.为了进一步推动中国--东盟自由贸易区的发展,应建立完善的争端解决机制.在分析《中国--东盟全面经济合作框架协议争端解决机制协议》特点的基础上,借鉴了欧盟、NAFTA中争端解决机制的相关规定,为完善中国--东盟自由贸易区争端解决机制提出一些建议.