fourth order difference of plane problem in polar coordinate system and its application

deduction of the general solution for plane problem in polar coordinate system

极坐标平面问题一般解的推证

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the displacement solution is constructed by applying the symmetry of scattering of sh-wave and the method of multi-polar coordinate system.

利用SH散射的对称性和多极坐标方法构造了问题的位移解。

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the difference scheme of torsion problem of a bar with a sector cross- section under the polar coordinate system is derived.

导出了极坐标系下扇形截面杆扭转问题的差分格式；

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an analysis of the surgical treatment of peri-ampullar carcinoma with 335 cases

335例壶腹周围癌手术分析

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local resection for small peri-ampullar carcinoma

小壶腹周围癌的局部切除

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ct diagnosis on pancreatic and peri-ampullar carcinoma with invasive portal vein

胰腺癌及壶腹周围癌侵犯门静脉系统的CT诊断及治疗

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pancreatojejunal internal drainage through t-tube bridging for advanced peri-ampullar carcinoma

胰管空肠T管架桥内引流术治疗晚期壶腹周围癌

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the preoperative diagnosis of invasion of portal vein by pancreatic and peri-ampullar carcinoma

胰腺癌及壶腹周围癌侵犯门静脉系统的术前诊断

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anti-sub warfare is based on sonar and acoustic detection of underwater craft.

反潜战的基础是声纳和水下声波探测技术。

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in this paper the torsional vibration problems of the propulsion shaft system of the underwater craft were discussed.

主要讨论以摆盘式活塞发动机作为其主机的某水下航行装置推进轴系的扭转振动问题。

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a more reliable image information processing system based on data-fusion model

一种基于数据融合方法的高可靠性的图像信号处理系统

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homogeneous function of order k k

阶齐次函数

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the penetration potency of either menthol oil or menthol crystal combined with 8% azone was more effective than that of azone alone(p05).

促进剂合用时，薄荷油或薄荷醇与8%氮酮合用的促透效果较好，均比单用8%氮酮有显著性增加（P0.05）。

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motion analysis of guided-bar mechanism based on the instantaneous center of velocity

瞬心法对导杆机构的运动分析

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on the theorem and application of moment of momentum for instantaneous center of velocity

对速度瞬心的动量矩定理及其应用

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he article expounds a new method to solve the instantaneous center of velocity between two disconnected members in the mechanism.

本文阐述了求机构中不相邻两构件间速度瞬心的一种新方法，即“对心四边形法”。

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if the initial workpiece is solid, a drilling operation must be performed first.

如果初始工件是实心的，则必须首先进行钻孔作业。

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a blo estimate for maximal singular integral operator

极大奇异积分算子的一个BLO估计

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new sufficient conditions for the lp boundedness of the singular integral operator

奇异积分算子Lp有界性的新的等价条件

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a weighted estimate for the commutator of a homogeneous singular integral operator

奇异积分算子交换子的一个加权估计

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