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By means of constructional iterative equation, this paper presents a way to give out the existence and singularity of a type of equational root with gradual approach method.
中文意思:
摘要本文通过构造迭代函数,利用逐次逼近的方法给出了一类方程根的存在性与唯一性的判断的一种解决方案。


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By means of comparative experiments, this paper illustrates the influences of different cements, admixtures of flash-setting agents, water cement ratios, curing temperatures and raw materials on the performances of sprayed concrete, such as the setting ti 摘要通过对比试验,阐明了不同水泥、不同速凝剂掺量、水灰比、养护温度以及原材料在不同风化和水化程度条件下,对喷射混凝土凝结时间、强度、收缩率等性能的影响,以期为喷射混凝土的实际应用提供规律性的参考资料。
By means of comparing, analyzing and generalizing the functions and needs of a water environment information systen, the commonness of the system function may be found. 摘要对当前水环境信息系统的功能进行了比较和归纳,对其业务需求进行了抽象概括,找出其功能上的共性。
By means of comparison and calculation of two kinds of shuttlelesss rapier and air jet loom in invest yield and manufacturing cost etc., it is demonstrated that although the once only investment of air-jet loom is greatter, yet it has distinctive superior 摘要通过对性能相近的剑杆多臂和喷气多臂两种无梭织机在投资、生产率及生产成本等方面的对比和计算,证明喷气织机虽然一次性投资较大,但以其独特的车速优势、生产率优势奠定了其在无梭织机中的重要地位。
By means of comprehensive study of the whole process to derive the calculation of relative gain variation, a mathematical formula how to make a well-founded understanding and correct use of the differential calculation method when making every efforts to 因此,本文通过全面考察推导增益相对变化量的计算全过程,根据所给出的另一种准确计算方法,重点提出了在要求准确地计算放大器闭环增益的相对变化量时,怎样正确理解和运用微分计算方法的数学表达式。
By means of computer network and modern communication technology, the intellectualized real-time information system realizes the control of electricity production process, the transfer of data information and the record of production information in the pr 该智能化实时信息系统是以计算机为工具,以现代通信等技术为手段,在发电企业生产调度决策管理系统中,实现了电力生产过程的控制、数据信息的传递、生产信息的记录等。
By means of constructional iterative equation, this paper presents a way to give out the existence and singularity of a type of equational root with gradual approach method. 摘要本文通过构造迭代函数,利用逐次逼近的方法给出了一类方程根的存在性与唯一性的判断的一种解决方案。
By means of cultural heritage data, questionnaire, investigation, observation etc. this thesis analyses the factors influencing the aerobics exercise for boy-students at athletic educational speciality at the colleges of Henan province and put forward som 摘要通过文献资料、问卷调查、观察等研究方法对高校体育教育专业男生健美操学习的影响因素进行分析,并提出促进男生学习健美操的一些建议,以期为健美操的普及与发展提供参考依据。
By means of determining the mature and quantities of distribution, assemblage and transfer layers in distribution system, the conclusion is made that in perfect situation, the optimal distributing construction depends on distance and density of requiremen 通过对配送系统运作中的分货、集运与运输中转分层的定性与定量分析,从而得出在理想的状态下,运输最优的配送结构主要取决于距离和需求点密度的结论,并给出了实际问题中结合经济规模确定最优层次的方法。
By means of discussing plane symmetry that relates to point, curved surface and curve in a three-dimensional space, this paper gives a method to study point、curved surface、plane symmetric point on a curve、symmetric curved surface and symmetric curve equat 摘要讨论了三维空间中,点、曲面、曲线关于平面的对称问题,从而给出了求点、曲面、曲线关于平面对称的对称点、对称曲面、对称曲线方程的方法。
By means of documentary, psychometrics, experiment, expert consultation and statistics, this paper carries out experimental research of effect of soccer and table tennis exercise on children's attention concentration. 摘要运用文献资料法、心理测试法、实验法、专家咨询和数理统计法,研究了足球与乒乓球锻炼对小学生注意集中性的影响。
By means of engineering examples, a comparison is made on the economy and environmental protection for four cooling and heat sources, including gas direct-fired machine, centralized heat-supply plus electric refrigerating, gas boiler plus electric refrige 通过工程实例,对以燃气直燃机、集中供热+电制冷、燃气锅炉+电制冷、空气源热泵+燃气调峰锅炉4种冷热源的经济、环保性进行了比较。
 
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