九道岭煤矿贯通测量方案设计与新方法研究

设计了两套九道岭煤矿副井与西风井之间-700m水平大巷贯通测量方案,并从精度和工程预算等方面分析了其优缺点,选出最优方案。讨论了井下导线加测陀螺边的优点,提出测陀螺边的最佳位置为2i/（2m＋1）L （L为导线全长,适用等边直伸型导线）,最佳条数为1～2条。     

对外开放度与经济增长关系研究——以河南省为例

基于河南对外开放度与经济增长情况,采用指标分析和回归分析方法,利用SPSS13.0统计软件,对河南省的对外开放度与GDP的相关性进行分析。结果表明,对外开放度系数与GDP高度关联,即对外开放促进了河南经济增长,经济增长带动了河南的对外开放。进而提出充分利用中原经济区建设的机遇,在改善投资环境上实现新突破,加快河南经济的对外开放步伐等对策建议。     

Responses of two trophic levels to patch enrichment along a New Zealand stream continuum

We carried out a benthic survey and two experiments in runs at eight sites down the Kakanui River (South Island, New Zealand) during summer low flows, to investigate the interaction between nutrients, periphyton, and macro‐grazers. Benthic periphytic biomass was generally low (< 20 mg mup>‐2up> chlorophyll a) at most sites, but high densities of macro‐grazers (mainly snails) were observed at six of the eight sites. Chlorophyll a and cellular P concentrations were generally higher on artificial substrates in the first‐ to third‐order tributaries, compared with downstream. Macro‐grazer densities (mainly snails) were also highest in the second‐ and third‐order tributaries. Enrichment of patches with N and P did not translate into significant increases in chlorophyll a concentrations. Instead there was a general increase in macro‐grazers, and an increase in the relative abundance of Cocconeis placentula. In a second experiment, the chlorophyll a level was five‐fold higher on the substrates where macro‐grazers were excluded and there was no significant response of chlorophyll a to nutrient addition on these substrates. On the grazed substrates, densities of snails and caddis‐larvae were two‐fold higher with N+P enrichment. These experiments provided evidence for a tight coupling between first and second trophic levels, and strong grazer control of periphyton, in this river.     

Solutions of pore pressure build up due to progressive waves

The analytical solution of soil pore pressure accumulations due to a progressive wave is examined in detail. First of all, the errors contained in a published analytical solution for wave‐induced pore pressure accumulation are addressed, and the correct solution is presented in a more general form. The behaviour of the solution under different soil conditions is then investigated. It is found that the solution for deep soil conditions is sensitive to the soil shear stress in the top thin layer of the soil. However the solution is significantly influenced by the shear stress in the thin layer of soil near the impermeable base, for shallow and finite depth soil conditions. It is also found that a small error in the soil shear stress can lead to a large error in the accumulated pore pressure. An error analysis reveals the relationships between the accuracy of the pore pressure accumulation and the accuracy of the soil shear stress. A numerical solution to the simplified Biot consolidation equation is also developed. It is shown that the error analysis is of significant value for the numerical modelling of pore pressure buildup in marine soils. Both analytical and numerical examples are given to validate the error estimation method proposed in the present paper. Copyright © 2001 John Wiley & Sons, Ltd.     

中国开放政策对区域发展的作用

在对中国对外开放政策作用进行了定性分析的基础上 ,利用计量经济模型方法 ,就近 2 0年来中国对外开放政策对中国东部沿海地区的经济发展作用效果进行了计算模拟分析。首次 ,从数量上 ,探讨了中国对外开放政策对区域经济发展的作用效果。 ( 1 )在对外开放中 ,通过提供各种优惠政策 ,吸引来了大量的建设资金 ,缓解了区域经济发展中资金不足的问题 ;( 2 )对外开放政策的实施加快了区域经济增长速度 ,促进了区域经济发展 ;( 3)对外开放政策促进了区域外向型经济的发展 ,使中国经济的外向度得到了很大提高 ,在较短的时间内成为世界贸易大国 ;( 4 )对外开放政策 ,改变了中国经济发展布局 ,加快了基础产业发展 ,较好地解决了以往长期制约国民经济发展的能源、原材料等基础工业发展滞后问题。通过模型计算 ,在对外开放的 2 0年中 ,中国东部沿海地区的 GDP增长总额为 9670 .42× 1 0 8元 ,其中对外开放政策的贡献作用达 2 0 68.0 7× 1 0 8元 ,即 2 0世纪 80年代初开始的对外开放政策对东部沿海地区 GDP的作用效果达 2 0 68.0 7× 1 0 8元 ,平均作用效率达 2 1 .39%。     

再塑青岛国际海洋名城的特色美

21世纪是海洋的世纪，青岛位于亚欧大陆和太平洋的海、陆交汇地带，又是中国重要的港口城市和山东省及沿黄流域主要出海口岸，先后被国家列为经济中心城市，沿海开放城市、计划单列城市和15个副省级城市之一。特别是迈入新世纪，青岛又成为北京承办2008年奥运会的唯一伙伴城市。这是一次难得的历史机遇，必需紧紧抓住机遇，以筹办水上奥运为契机，再塑青岛国际海洋旅游名城。     

The global solution of the N-body problem

The problem of finding a global solution for systems in celestial mechanics was proposed by Weierstrass during the last century. More precisely, the goal is to find a solution of the n-body problem in series expansion which is valid for all time. Sundman solved this problem for the case of n = 3 with non-zero angular momentum a long time ago. Unfortunately, it is impossible to directly generalize this beautiful theory to the case of n > 3 or to n = 3 with zero-angular momentum.A new blowing up transformation, which is a modification of McGehee's transformation, is introduced in this paper. By means of this transformation, a complete answer is given for the global solution problem in the case of n > 3 and n = 3 with zero angular momentum.The main result in this paper has appeared in Chinese in Acta Astro. Sinica. 26 (4), 313–322. In this version some mistakes have been rectified and the problems we solved are now expressed in a much clearer fashion.     

矿井地质工作方法浅析 --以开滦荆各庄矿为例

通过 对 荆各 庄矿 构 造条 件的 基 本规 律的 分 析,查 找 造成 工作 失 误的 原因 ,阐 述 对井 田 地 质条 件 的 再 认识 ,揭示总 结交 流 矿井 地质 工 作的 基本 方 法。     

漳州经济开发区7号山体爆破地震波衰减规律的分析

本文通过对漳州开发区7号山体硐室大爆破振动速度、加速度的测试及数据的初步分析,阐述了爆破地震波衰减规律及其影响因素。并引入平均衰减指数的概念,对开发区当地以后众多的大、中型爆破抗震的安全设计提供有益的依据。     

山西地区生土建筑震害特征与防震减灾对策

山西地处黄土高原区，许多民宅为生土建筑，在调查研究的基础上，按照建筑形式、结构特点，将山西生土建筑分为5类，总结了生土建筑的分布特点和结构特征，结合建筑物震害经验讨论了生土建筑的震害机制和主要影响因素，以及生土建筑存在的问题和防震减灾对策。