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In this paper the mixed problem of the rd order linear Bianchi equation Bu≡u_(xyz)-au_(yz)-bu_(zx)-cu_(xy)-du_x-eu_y-fu_z-gu=F and some boundary problems are particularly studied.
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本文具体讨论了三阶线性Bianchi方程 Bu≡u_(xyz)-au_(yz)-bu(zx)-cu(xy)-du_x-eu_y-fu_z-gu=F的混合问题和一些有关的定解问题。 |
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In this paper the profile of bobbing cutter is designed by the principle of mesh in space, the profile in axial section is a point contact cosjugate helix surface.
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本文运用啮合原理设计的滚刀齿形,是一个完整的点接触共轭螺旋面的轴向截形。 |
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In this paper we developed CIT/XML security platform and take a close look to syntax and processing of CIT/digital signature model, CIT/encryption model, CIT/ smart card crypto and SPKI interface security models.
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在本文中我们提出了CIT/XML安全平台 ,并详细介绍了CIT数字签名 ,CIT加密模型 ,CIT智能卡加密和SPKI接口安全模型的语义和处理 . |
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In this paper we discussed the characteristic problem of rd order linear Bianchi equation: Bu≡u_(xyz)-au_(yz)-bu_(zx)-cu_(xy)-du_x-cu_y-fu_z-gu= F(x. y. z).
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本文讨论了三阶线性Bianchi方程: Bu≡u_(xyz)-au_(yz)-bu_(zx)-cu_(xy)-du_x-eu_y-fu_z-gu=F(x,y,z)的特征问题。 在一定的条件下,我们用流图的方法得到了它的解案表达式。 |
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In this paper we have solved the following problems: . We have provedTheorems -, thereby solving the tricky problem whether there exist symmetriclines or symmetric planes on minimal surfaces.
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本文解决了以下三个问题:.给出了定理—,解决了极小曲面上是否存在对称直线或对称平面的问题,并且对若干重要的极小曲面进行了讨论。 |
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In this paper we present a method of separation of variables in evaluating propagation constants and field distributions of gulden modes in a rib waveguide with trapezoidel cross section.
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本文给出用分区分离变量法计算梯形截面脊形介质波导传插特性与场分布的近似方法. |
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In this paper we study the globally topological linearization of differential equations. Under some weak conditions we get the global linearization of x' = Ax + f(x), which generalizes Hartman's result.
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本文研究微分方程全局拓扑线性化,在某些弱条件下得到系统χ’=Aχ+f(χ)的 全局线性化,推广了Hartman的结果. |
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In this paper, 7 species ( new species) belonging to genera from the Zhidan Group are studied by writer. They are mainly Coniferopsida and Cyca- dopsida, but Filices and Ginkgopsida are absent.
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本文描述了鄂尔多斯盆地西南部华亭-陇县地区志丹群的7种植物化石(内有 个新种,0个未定种)。 |
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In this paper, a simple and practical electrically small planar unipole antenna is presented, and the dependences of input impedance on dimension of the antenna and frequency are investigated.
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本文提出一种简单而实用的平面结构的单极子电小天线 ,研究输入阻抗随天线外形尺寸和频率的变化规律。 |
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In this paper, adhesive wear is analyzed by example of unit accident caused by nibble and bite damage on guide tube of hydroturbine guide vane servomotor and correspondent preventing is given.
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本文以水轮机导叶接力器导管的啃伤咬死造成的机组事战为例,主要从粘着磨损方面进行了分析,并提出了相应的防范措施。 |
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In this paper, based on Darwin's theory of nature evolution and Mendel's theory of hereditary and variation, the genetic algorithm of Agent and evolution model is given.
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它具有自治、反响、推测、协作、自学习和相互学习等能力 ,本文基于Darwin自然进化论与 Mendel遗传变异理论 ,给出 Agent的遗传算法与演化模型 . |
