溪洛镀水电站坝区岩体的浅表生改造

通过对溪洛渡水电站坝区浅表生变形破裂形迹空间发育规律及浅表生结构组合型式的调查 ,结合地质地貌演化机制分析 ,探讨了坝区浅表生改造的机制模式。研究表明 ,浅表生改造与河谷地貌演化密切相关 ,改造方式有垂向卸荷和侧向卸荷 2种 ;由缓倾角断裂构成的板裂状岩体结构对浅表生改造起了重要控制作用 ,浅表生结构的典型组合型式为由陡、缓倾角断裂组合形成的“阶梯状”回弹错动型式。该研究对认识河谷岩体的岩体结构特征具有重要意义     

重庆市产业结构高度分析

为进一步对产业结构进行质的分析提供更加广阔的历史背景，为调整和优化重庆市产业结构提供依据和参考，在明确重庆市就3次产业结构在西部地区的地位的基础之上，分别对重庆市3次产业结构(就业结构和产值结构)与世界发达国家及世界各个层次水平国家进行了静态和动态比较，从不同角度考察了重庆市3次产业就业及产值结构高度与这些国家的静态相似性，以及动态的变化速度，得出了重庆市目前在经济发展阶段上相当于工业化加速期的结构性解释。     

山东省水资源可持续利用研究

在中国严重缺水的省份之一山东省水资源现状的基础上，分析了山东省在水资源利用方面存在的问题，并提出了确保山东省水资源可持续利用的可行性措施。     

框架结构的抗震设计

框架结构在抗震设计中常会遇到的几个问题。从房屋高度和抗震等级、结构类型、结构布置、防震缝、承载力与延性、结构变形导几个方面分别进行了阐述，以减少地震时对框架结构的破坏。     

时间选择性莱斯衰落信道条件下的OFDM系统

给出了时间选择性莱斯无线衰落信道条件下一种64—QAM 0FDM系统的理论论证，并给出了仿真结果。首先，对波形形成技术和TCM编码使AWGN(加性高斯噪声信道)条件下的0FDM系统性能得到改善进行了探讨；其次，讨论了COFDM(编码0FDM调制)系统抗时间选择性莱斯衰落性能。选择有效的信道编码和波形形成方法可以得到系统的理想抗衰落性能。     

Archaeal acylamino acid releasing enzyme/lipase:Crystallization and preliminary crystallographic analysis in a new crystal form

A primitive orthorhombic crystal form of acylamino acid releasing enzyme‘lipase(APE1547)from hyperthermophilic archaeon Aeropyrum pernix strain K1 has been obtained at 291K.The diffraction pattern of the crystal extends to 0.27nm resolution at 100K using Cu Kαradiation.The crystal belongs to the space group P212121 with unit cell dimensions of b=6.399,b=10.439and c=16.953nm.The presence of two molecules per asymmetric unit gives a crystal volume per protein mass(Vm)of 0.0022nm^3 Da^-1 and a solvent content of 43% by volume.A full set of X-ray diffraction data were collected to 0.3nm from the native crystal.     

Progress in the study of tectophysicochemistry

Tectophysicochemistry is a research area that deals with the interrelations between physical and chemical changes of crustal materials caused by tectonism. A given tectonic force may be resolved into two parts: homogeneous stress and differential stress. Homogeneous stress refers to isotopic pressure, which is superimposed on the original pressure and affects the equilibrium of various chemical reactions. It is also a factor that influences petrogenesis,metallogenesis and metamorphism. Differential stress is commonly produced when external forces act on a given solid body. It may cause deformation of crustal materials and generate various kinds of structural features. Tectophysicochemistry pays special attention to pressure, temperature and other physicochemical conditions produced or induced by tectonism and studies the influences of additional tectonic parameters on various chemical equilibria, so it gradually develops into an independent area of science.     

The age of formation of the mirabilite and sand wedges in the Hexi Corridor and their paleoclimatic interpretation

The Hexi Corridor is located at the transition zone of the Asian summer monsoon and westerly airflow, and lies in an important position in terms of its ecological fragility and climatic sensitivity. During a recent field expedition to this region, we found a sedimentary mirabilite layer in a number of localities including Suwushan, Yanchi, Baitujing, Yanchi Gaotai, Huahai, Yumen, Halanuo扙r, and Dunhuang (Fig. 1), which have the potential to provide important information about environmenta…     

激光雷达测量数据的两种计算方法比较

利用轻便型扫描式的米散射激光雷达对香港地区的大气气溶胶分布进行了测量。该激光雷达可以在10min内,以120°倾角对大气进行扫描,扫描高度为1～4km。用2种计算方法对激光雷达测得的数据进行了分析,分别利用前向法和后向法计算了大气气溶胶的消光系数对高度的变化情况,并把计算结果与理想情况进行了比较,分析后认为后向法更为稳定。