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In this paper, by constructing a special cone and using Krasnoselskii fixed point theorem, the existence of two positive unbounded solutions of infinite boundary value problem of a class of nonlinear second order differential equation is proved.
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摘要本文通过构造一个特殊的锥，利用锥拉压不动点定理，证明了一类非线性二阶微分方程无穷边值问题的两个正无界解的存在性。 |
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In this paper, by estimates of spectral of an integral operator, the authors give a theorem on the existence of solutions for first order differential difference equations with boundary condition.
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摘要通过对积分算子谱的估计，作者给出了一阶线性微分差分方程在边值条件下解的存在唯一性定理。 |
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In this paper, by explored geo-physico-chemical prospecting method for looking for oil in prior prospect, the authors summarize a suit of prospective technique and program, which is valid to oil-geology trait of Zhidan area and composed of; oil gas geo-ch
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通过勘探早期地质物化探综合找油方法实验，笔者总结了一套适合志丹探区石油地质特点的勘探方法组合和勘探程序：油气地球化学勘探（酸解烃、吸附烃、荧光光谱、紫外光谱、甲烷碳同位素、蚀变碳酸岩）→化探圈定的有利勘探区进行非地震物探（自然电位、伽玛能谱、高精度磁测、土壤测氧）→物探圈定的异常区进行电阻率测深勘探→地质物化探成果综合评价。 |
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In this paper, by means of macro-morphology inspection, chemical composition analysis, microstructure examiation, mechanical property testing and X-rays diffraction analysis, the fractured bolt and random sample bolt were analyzed.
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摘要采用断口宏观形貌观察、化学成分分析、显微组织检验、力学性能则试及腐蚀产物的X射线衍射分析等手段，对断裂与部分抽检的卡瓦螺栓进行了综合试验分析。 |
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In this paper, by neutron radiation detection with the passive method, the study on detectability, neutron spectra, etc. for the plutonium combined systems including the stimulated nuclear warhead assembly are introduced.
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摘要介绍了通过探测中子辐射，用被动方法研究了包括模拟核弹头装置在内的各杯组合系统的可探测性和中子能谱等内容。 |
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In this paper, by studying of ship steel structure, the modeling and applications of RBF neural network to ship-welding distortion are proposed.
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摘要以船舶钢结构为对象，研究了RBF神经网络在船舶焊接变形中的建模及应用。 |
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In this paper, by using Monte Carlo Method with irregular grid random walk in time-space domain the problem of mass concrete transient temperature field was solved.
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摘要利用求偏微分方程的蒙特卡罗算法，通过在时空域中不规则网格随机游动来求解大体积混凝土不稳定温度场。 |
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In this paper, by using the fixed point index method, the authors discussed the periodic boundary value problem of first order differential systems.
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摘要利用锥上的不动点指数研究了一阶非线性常微分方程组的周期边值问题。 |
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In this paper, by using the property of fourier series a compound series consisting of trigonometric series and power series is established.
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摘要利用由三角级数和幂级数复合构成的函数项级数的有关性质，得到了一类变系数非齐次调和方程边值问题的级数解。 |
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In this paper, by using the relevant data of Zhejiang Province in 2005, we introduce the Weighted Mean Method, Principal Component Analysis, Factor Analysis and Clustering Analysis to evaluate and rank the synthetic economic power of the 11 main cities of
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摘要利用浙江省2005年有关统计数据，分别采用加权平均法、主成分分析法、因子分析法和聚类分析法对浙江省11个中心城市的综合经济实力进行了综合评价和排位。 |
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In this paper, by way of example of the elevated pile cap construction of Sanmenjiang Bridge in Liuzhou City, the design and construction of the column steel boxed cofferdam of tensile and compressive type are introduced with particular details given to i
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以柳州市三门江大桥高桩承台施工为例，介绍拉压柱式钢吊箱围堰的设计与施工，重点介绍钢吊箱围堰的设计方案、工作原理、施工工艺及施工要点等技术细节，同时对钢吊箱围堰施工中的注意事项进行了阐述。 |
