周宁水电站安全性评价工作

安全性评价是一种现代化的管理手段。开展安全性评价可以提高水电站的安全生产管理水平和设备安全稳定运行水平。结合工作实践,介绍了周宁水电站安全性评价工作的实施过程、主要措施和取得的初步成效。     

特低渗透油气藏成岩储集相的定量评价方法

针对陕北斜坡东部特低渗透储层受沉积作用和成岩作用两大因素控制的特点，利用灰色系统理论对成岩储集相进行了研究。分析了成岩作用综合效应及其相应的视压实率、视肢结率、视微孔率、成岩综合系数等定量指标和岩心分析数据，建立了成岩储集相综合评价参数、指标和分析方法。通过在安塞油田低孔隙度特低渗透长6。油藏储层的实际应用，对目的层段开展了Ⅰ，Ⅱ，Ⅲ和Ⅳ类成岩储集相的定量评价和油气富集描述，有机地集成和综合了多种信息，实现了成岩储集相对沉积学、岩石学和成岩作用等特征的综合表征，并划分出有利成岩储集相区域，为指导油田有利含油区块的筛选和开发决策提供了重要依据。     

灞河生态治理工程模型试验研究

通过模型试验 ,对位于西安市东郊因采沙使河道破坏严重的灞河河段进行了复现试验和研究 ,并以此为依据 ,通过优化比较为设计部门提供了合理的橡胶坝坝址和坝座高程。在此基础上 ,又对建坝后橡胶坝对上下游冲淤变化的影响进行了试验研究和分析 ,解决了工程设计中的一些关键技术问题     

The Challenge of the Market

Identifying markets for new or improved products for minor crops threatened with extinction is one critical component of any strategy intended to enhance prospects for sustainable production and use. Typically, however, activities linked to the sustainability of these commodities avoid addressing questions associated with assessing their commercial potential. After a brief review of this avoidance syndrome, this article presents a sample of practical, low-cost procedures to help evaluate the market prospects and procedures for crops like quinoa, while citing references to other methodological materials covering similar topics.     

Probabilistic analysis of uncertainties in seismic hazard assessment

Sources and current methods of analysis of uncertainty from randomness, fuzziness and ignorance or incomplete knowledge in seismic hazard assessment problem are briefly discussed at beginning; understandings of the authors are then presented in the following order. All three types of uncertainty come from incomplete knowledge. Probabilistic method can be applied to all of them, objective probability for random factors and subjective probability for the other two types of uncertain factors. Discrete subjective probability mass functions for incomplete and fuzzy factors can be obtained from logic-tree and membership functions respectively. Fractile curves may be used to show the scattering of any uncertainty factor, but a unified probabilistic treatment may be applied to any combination of all three types of uncertainty.     

浅谈黄土高原重点水土流失区的林业生态工程建设

黄土高原重点水土流失区林业生态工程建设的现状可以用“三低”（造林成活率低、保存率低、林木生长率低）来概括，人工林具有矮化，纤细，低产，烯疏4个特征，自然条件，适地适树、苗木质量、造林技术、抚育管护等5个方面的问题是造成“三低”的主要原因，适地适树适法是现阶段防治中造林“三低”的主要技术途径，其核心是“林水平衡”合理布局，适地适树，重视经济树种、抗旱造林以及加强病、虫、鼠、免、牛、羊、危害防治，是搞好区内林业生态建设的主要技术措施。     

Coupling GIS with Hydrologic and Hydraulic Flood Modelling

Geographic Information Systems (GIS) have been recognised as a powerful means to integrate and analyse data from various sources in the context of comprehensive floodplain management. As part of this comprehensive approach to floodplain management, it is very important to be able to predict the consequences of different scenarios in terms of flooded areas and associated risk. Hydrologic and hydraulic modelling plays a crucial role and there is much to gain in incorporating these modelling capabilities in GIS. This is still a rather complex task and research is being done on the full integration of these models. Interfacing between these models and GIS may be a very efficient way of overcoming the difficulties and getting very good results in terms of engineering practice. This paper presents results based on the use of Intergraph GIS coupled with Idrisi GIS. Using these two systems substantially increased the flexibility of using GIS as a tool for flood studies. A lumped (XSRAIN) and a distributed (OMEGA) hydrologic models were used to simulate flood hydrographs. The well known HEC-2 Hydraulic model was used to compute flooded areas. These models were applied in the Livramento catchment with very good results. The computation of flooded areas for different flood scenarios, and its representation in GIS, can be used in the assessment of affected property and associated damages. This is a very useful GIS-based approach to floodplain management.     

Assessment of the types of public building maintenance contracts in Saudi Arabia

The study revealed that Fixed Price, Cost Plus and Purchased Labour contracts are the top three maintenance contracts adopted whilst Unit Price, Cost Plus A Percentage Fee contracts are alternatives used in the Kingdom. Some other types of maintenance contract were thought to be inappropriate by ministry departments.     

油田开发经济运行质量研究与应用

提出了油田开发经济运行质量的研究方法和技术思路。对胜利油区几种典型的油藏类型进行了经济运行质量评价。以老河口油田桩106块为例，提出了提高油田经济运行质量的三条基本途径，取得了较好的实际应用效果。     

建筑容积率对地价影响规律及修正方法研究

在分析建筑容积率对土地价格影响的作用机制和规律的基础上，针对目前土地估价工作中，容积率修正系数确定存在的问题，提出新的容积率修正思路和方法。