卫星云图在短时降水预报中的应用

把卫星云图分析同数值预报产品及常规资料相结合,给出了淮南市短时降水预报指标,以提高卫星云图在短时预报中的可用性。     

一次台风暴雨过程数值产品动力释用预报的模拟试验

以国家气象中心T42产品资料作为环境的初始场,采用P－σ混合坐标的有限区域细网格模式,对9406号台风暴雨过程进行24、48小时数值预报模拟试验并取得较好效果。     

A study on quality of aquatic environment in Tumen River Area

ＡＳＴＵＤＹＯＮＱＵＡＬＩＴＹＯＦＡＱＵＡＴＩＣＥＮＶＩＲＯＮＭＥＮＴＩＮＴＵＭＥＮＲＩＶＥＲＡＲＥＡ①ＺｈｕＹａｎｍｉｎｇ（朱颜明）ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＧｅｏｇｒａｐｈｙ,ｔｈｅＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ,...     

旅游产品及其市场营销的若干问题

提出了旅游资源与旅游产品的概念,阐述了与分析了旅游产品的特性、整体旅游产品的三个层次、旅游产品的价值与定价原则、旅游产品的促销等问题。     

煤矿安全与生产调度管理系统

以平顶山矿务局四矿为例,结合煤矿生产实际,论述了以计算机为中心,集矿井灾害监测和工况监测于一体的现代化煤矿安全与生产调度管理系统的原理、结构、功能与实现方法。     

Earthquake safety assessment of concrete arch and gravity dams

Based on research studies currently being carried out at Dalian University of Technology, some important aspects for the earthquake safety assessment of concrete dams are reviewed and discussed. First, the rate-dependent behavior of concrete subjected to earthquake loading is examined, emphasizing the properties of concrete under cyclic and biaxial loading conditions. Second, a modified four-parameter Hsieh-Ting-Chen viscoplastic consistency model is developed to simulate the rate-dependent behavior of concrete. The earthquake response of a 278m high arch dam is analyzed, and the results show that the strain-rate effects become noticeable in the inelastic range. Third, a more accurate non-smooth Newton algorithm for the solution of three-dimensional frictional contact problems is developed to study the joint opening effects of arch dams during strong earthquakes. Such effects on two nearly 300m high arch dams have been studied. It was found that the canyon shape has great influence on the magnitude and distribution of the joint opening along the dam axis. Fourth, the scaled boundary finite element method presented by Song and Wolf is employed to study the dam-reservoir-foundation interaction effects of concrete dams. Particular emphases were placed on the variation of foundation stiffness and the anisotropic behavior of the foundation material on the dynamic response of concrete dams. Finally, nonlinear modeling of concrete to study the damage evolution of concrete dams during strong earthquakes is discussed. An elastic-damage mechanics approach for damage prediction of concrete gravity dams is described as an example. These findings are helpful in understanding the dynamic behavior of concrete dams and promoting the improvement of seismic safety assessment methods.     

Safety analysis of water resources and eco-environment in Shiyang River Basin

The research on the present situation of soil and water development and utilization in Shiyang River Basin shows that water resources and eco-environment situation in this area are near the edge of collapse. Since the water crises occurred in the 1970s, problems caused by continuous decrease of water resources have been becoming serious year by year and eco-environment crisis occurred as a consequence. Up to now, 10 380ha of irrigated lands have been abandoned due to sand coverage and water shortage in the basin. Ground water was over exploded in Wuwei and Minqin because of water shortage. Ground water table in many places dropped under 5m (which is the ecology water table level), thus about 3000ha of Elaeagnus angustifolia forest come to dead and another 5800ha become feeble, and wind-drift sand near the oasis become alive. According to the current situation, if water utilization scope was not enlarged, a water transfer volume of 600×10⁶m³/a from other areas will be suitable to keep water resources and eco-environment safety in the basin, and also 70×10⁶m³/a will be left as spare water. Under this condition the water resources and eco-environment of the basin can reach the critical safety line of 2.032×10⁹m³/a; or if 180×10⁶m³ of water can be transferred from other areas, the water resources can reach the safety warning line of 1.732×10⁹m³/a. Foundation item: Under the auspices of the National Natural Science Foundation of China (No. 40235053) and Lanzhou Jiaotong University "Qinglan" Foundation Biography: ZHANG Ji-shi (1963-), male, a native of Tongwei of Gansu Province, senior engineer, specialized in water resources and climate change in Northwest China. E-mail: zjs1963@yahoo.com.cn; hangjs@mail.lzjtu.cn     

现役导管架式海洋平台结构整体安全度评估

本文提出了一整套评估导管式海洋平台结构整体安全度的简化方法。主要工作包括：讨论了现役结构内力重分析的影响因素并提出了考虑原则和处理方法；将基本构件依受力特点和重要性程度予以分类、并通过划分层结构而将结构整体简化为层结构的串联体系；用强度储备比定义了基本构件的安全度指标、并延拓此定义于层结构和结构体系；结合专家经验并利用模糊数学原理综合结构的整体安全度指标。文章同时给出了工程应用实例     

鱼类实验动物研究概况及在水产动物病害研究上的应用

鱼类实验动物在现代生命科学研究中扮演着越来越重要的角色。本文概述了国内外鱼类实验动物的应用、育种及模型开发的现状与发展趋势,并对其在水产动物病害研究中的应用进行了简要介绍。