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Abstract: On the basis of the basic principles of ecology,the shrub vegetation in the Hexi Corridor was classified into eight types,of which distribution,ecological characters,ecological significance and relations with soil were studied,with emphasis on t
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文摘:本文从生态学基本原理出发，对河西走廊灌丛植被以群落建群种为基础进行了分类研究，将灌丛植被划分为8个类型，分别对灌丛群落的分布、生物学特性、生态学意义以及各类灌丛植被与土壤之间的关系，特别是对灌丛植被在改善河西走廊生态环境的作用、在干旱荒漠系统的防风固沙、建立荒漠草场以及防治荒漠化等方面进行了研究，并就河西走廊荒漠系统生态重建与可持续发展提出了对策。 |
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Abstract: On the basis of the constituent chemical bonds of crystal materials,the application of chemical bond viewpoint in the search for new type nonlinear optical crystal materials was studied and disscussed in the present work.
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文摘:从晶体组成化学键的角度出发，研究和探讨了化学键观点在寻找新型非线性光学晶体材料工作中的应用. |
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Abstract: On the basis of the current situation of the researches on earthquake prediction and earthquake mechanism，the authors of this paper give their opinions on the complication of the crust and its dynamic process,and make a brief description of the
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文摘:就地壳及其动力学过程的复杂性,结合地震预报与机理的研究现状和方法,提出了个人的看法,简介了非线性动态有限元方法。 |
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Abstract: On the basis of the practical design experiences and relatedreference literatures ,the basic principles,development process,key waveforms,performance features and application points of five new PWM constant current feedback control modes for inv
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文摘:根据实际设计工作经验及有关参考文献，比较详细地依据基本工作原理图说明了逆变焊机用的5种新型PWM恒流调节反馈控制模式的基本工作原理、发展过程、关键波形、性能特点及应用要点[1～3]。 |
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Abstract: On the basis of the property of superfine explosive HMX suspension and mechanism s of agglomeration & coagulation, influences of different agglomerants and coaga lants used alone or complexly on the subsidence property of superfine HMX suspe
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文摘:根据超细炸药HMX(奥克托今)悬浮液的性质，以及凝聚和絮凝作用机理，研究了凝聚剂、絮凝剂单组分及复合使用时对悬浮液沉降性的影响，并对不同的方案进行了比较。 |
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Abstract: On the basis of the relationship of public realm and public parks, especially in land acquisition and use, this paper gives an introduction of the development of urban parks and open space, current parks development strategies and some new direc
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摘要：本文通过对美国的公共领域与公园的关系的探讨，侧重土地的获得与利用，主要介绍美国城市公园和开放空间发展的历程、当今公园发展策略以及一些新的发展方向。 |
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Abstract: On the basis of the stat-of-the-art of protective buffers for base isolation, the step-stiffnessbase isolator of concrete filled steel tubular short column is put forward.
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文摘:在总结目前基础隔震缓冲限位装置现状的基础上，提出了梯队式变刚度钢管混凝土短柱基础隔震装置。 |
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Abstract: On the basis of the theory of controlled phase-changes of piezoceramics, high-temperature polarizing technology makes initial working temperature a little higher than Curie temperature of a sample, but the polarization voltage needed is greatly
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文摘:压电陶瓷的高温极化是利用受控的场致有序化的顺电―铁电相变原理，使起始极化温度略高于样品的居里温度，但所需的极化电压大大低于常规极化，仅为1/10-1/5；选择较高的降温升压速率，可使极化趋于更加完全，具有常规极化工艺无可比拟的优越性。 |
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Abstract: On the basis of working in the retail consulting company for many years, the author illustrates the innovations in shopping center management, marketing and leasing by specific examples in terms of enhancing customer service, building customer l
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摘要：根据在零售咨询行业的多年工作经验，介绍了购物中心在管理、行销和招商方面的创新，并例举了提高和改善客户服务，建立顾客的忠诚度，推进零售业绩的具体措施。 |
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Abstract: On the condition of high technology,model method of ground-to-air defense simulation is discussed.The achieving method by SIMAN simulation language is given.
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文摘:以高技术条件下的地面防空作战指控系统为背景，对地面防空作战指挥控制系统仿真建模的一般方法进行了探讨，并给出了用SIMAN仿真语言进行实现的方法步骤。 |
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Abstract: On the occasion of the 100th birthday of the well known geologist, Hou Defeng, some discussions on his important contributions to the development of mineral industry and Earth sciences in China are given.
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文摘:时值侯德封先生百年华诞之际，仅以此文缅怀他老人家在中国开拓矿业及发展地学两个方面所做出的重大贡献。 |
