Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang

Eolian loess is widely distributed on the various geomorphic surfaces between 700–2400 m a.s.l. on the northern slope of the Tian Shan. It is formed in a synchronous manner with dust transported from the Gurbantunggut Desert in the Junggar Basin. The thickest section of loess was found in the Shawan and Shihezi regions. Paleomagnetic and climatic proxy analyses of over 71 m of a loess-paleosol sequence on the highest terrace of the Qingshui He (River) in the Shawan show that the paleomagnetic Bruhues/Matuyama (B/M) boundary lies at the bottom of paleosol S8, at a depth of 69.5 m, and the bottom of the sequence was estimated to be ∼0.8 Ma. This implies that the extremely dry climatic conditions in the Junggar Basin and the initial Gurbantunggut Desert were present at least by 0.8 Ma. High-resolution grain size series demonstrate that this area and desert expansion experienced two dramatic periods of desert expansions that occurred at ∼0.65 Ma and 0.5 Ma, respectively; and the subsequent continuous enhancement led to the environment presently observed. This tremendous environmental effect, caused by large-scale expansion of the desert and arid region of inner Asia, might be an important driving force for the global temperature drop that occurred in the mid-Pleistocene.     

PGE patterns of ores of Dajing Cu-polymetallic deposit in Linxi County,Inner Mongolia: Indicator to source of metallogenic elements

By comparing PGE patterns of sulfide ores with that of basic-ultrabasic dikes occurring in the Dajing Cu-polymetallic deposit, we discover that there are similar positive slopes between the basic-ultrabasic dikes and the black ores composed mainly of sphalerite and galena, reflecting affinity of their source. The PGE patterns of the yellow ores composed basically of chalcopyrite, arsenopyrite and pyrite are actually different. One is close to the pattern of the mantle lherzolite, and others resemble the pattern of the basic rocks. However, the concentrations of Ru are higher in the yellow ores, reflecting that sulfur attains or approaches saturation in their parent magma. The PGE characteristics of ores and dikes show that the magmas derived from the deep of crust and the metallogenic elements were supplied mainly by growth material of the crust. In addition, the mantle-derived magma also offered some elements.     

Abnormal overpressure distribution and natural gas accumulation in foreland basins,Western China

Shizitan in Jixian County, Shanxi Province, is a site of transitional period from Paleolithic to Neolithic. The dating and the sporopollen analysis show that the middle reaches of the Yellow River where the site is located had been maintaining a steppe environment during 35.1-9.4 kaBP, in which, 35.1-17 kaBP belonged to the last glacial. With cold and dry climate, this period featured a desert steppe environment. In the late of this period, the area had a cold and half-humid steppe environment. The 17.0-11.9 kaBP belonged to the early- and mid-period of the last deglaciation. Mild and half-arid steppe alternates with mild and half-arid steppe, with a small amount of deciduous broadleaf species. During the period of 11.9-10.5 kaBP, cold and dry glacial climate appeared once more, featuring a desert steppe environment. During 10.5-9.4 kaBP, it is mild and half-arid, and later transited toward warm and half-humid. The early phase of this period featured a steppe environment and the later transited into a steppe environment with fairly more deciduous broadleaf species. Microlith, a mark of a transitional period from Paleolithic to Neolithic, was distributed mainly in 17.0-11.9 kaBP. The relatively warm, half-arid and fluctuating steppe environment in the early and medium period of the last deglaciation made a contribution to the appearance and development of Microlithic culture.     

机器人系统中环境动力学模型及其参数辨识

根据机器人系统中环境的本质特征，本文提出了环境动力学既有刚体运动力学特性，又有表面开变动力学特性的观点；由此建立了新的环境动力学模型，给出了该动力学模型参数辨识的遗传算法模型，理论分析和实验研究表是该模型及其参数辨识方法是实用的，可行的。     

面向管理任务的资源描述和操作语言的设计和实现

提出了一种面向管理任务的说明性语言－资源描述和操作语言（RDML），用于定义虚拟放管对象类（VMOC：VMO的类属），RDML可以措述VMOC的所有组成元素，包括：VMOC标识、VMOC参数，源属性（直接来源于被管资源），计算素属，VMOC事件，属性相关操作方法和用户自定义成员方法，本文还给出了基于VMO和RDML的管理体系结构和工作步骤，最后，通过一个RDML定义VMOC的例子说明：RDML具有简单的语法和管理任务级（goal-level)的描述能力，填补了管理应用和低层被管资源间的语义间隙，沟通了不同类型和管理层次的资源，简化了管理应用的开发。     

橡胶垫基础隔震建筑的地震作用简化计算

讨论了橡胶垫基础隔震建筑的地震作用简化计算。其中上部结构采用层间剪切模型，隔震系统采用双线性恢复力滞回特性曲线。考虑设防烈度、场地类别、隔震系统的阻尼比、刚度及其折减系数等因素的影响，将相应的地震记录输入分析模型进行时程分析，对时程分析的结果（基底剪力、基底位移、地震作用沿高度的分布）进行回归分析，提出了橡胶垫基础隔震建筑的地震作用简化计算方法，该方法的优点是计算简单且适用于双线性隔震系统。     

多媒体技术在化工过程仿真培训系统中的应用

介绍了多媒体技术在化工过程仿真培训系统中的具体应用，并详细地说明了利用VB语言编程实现多媒体的声音、动画效果的方法。     

火电厂单元机组再热器的物理仿真

给出了火电厂锅炉再热器的物理仿真模型，并分别从火焰、喷水，三通加热器、蒸汽流动及过热器干扰等方面进行了阐述，为研究再热汽温控制打下基础。