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Abstract: A class of general nonlinear neutral differential equations for its special cases are discussed.Sufficient conditions for all solutions of the equations to be oscillatory are obtained.It can be treated in the extreme limite theorem.
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文摘:在特定条件下讨论了一阶非线性中立型的微分方程振动问题,产生了一阶非线性中立型微分方程的振动准则,并用极限理论证明了该振动准则的正确性. |
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Abstract: A comprehensive critique on 10 years' architectural exploration of Yungho Chang, this essay is composed of Eight Steps of both diachronic and synchronic narrative and analysis.
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摘要：本文是对张永和十年来建筑探索的综合性评论，它由八步同为历时性和共时性的叙述、分析组成。 |
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Abstract: A continuity wave model is put forward for the dispersion processof liquid-liquid two-phase system,by coupling mass and momentum conservation equations of two-fluid model.The conditions that result in a dispersion choke and the weak instability
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文摘:以双流体模型为基础，通过质量守恒方程和动量守恒方程的耦合，提出了液-液两相系中弥散传质的连续波模型.由该模型得到弥散传质过程阻塞和弥散传质过程弱不稳定性产生的条件，计算了液滴尺寸及其分布对乳化液极大堆砌分数的影响，解释了剧变型乳化逆变和渐变型乳化逆变现象.研究结果表明，乳化逆变是由于弥散传质过程的不稳定性而引起的悬浮体型态的改变，随液滴尺寸多分散性的增大，极大堆砌分数增大；随液滴平均尺寸的增大，多分散性对极大堆砌分数的影响减弱；当韦伯数足够大时，液滴尺寸及其分布对乳化液极大堆砌分数无影响. |
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Abstract: A continuous fabric of Carpet-Housing covers the whole site, connecting the upper and lower two communities, which were separated by a retaining wall.
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摘要：地毯式集合住宅作为一种连续的肌理，覆盖整个基地，连结被挡土墙分隔的高低两个社区。 |
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Abstract: A crack appeared in the junction between the base of the aisle ladder and the ground of the power plant and made cool leakage on airseparating aguipment.
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文摘:杭钢动力厂走梯旁基础与地坪连接处出现一条裂缝，致使空分设备出现漏冷。 |
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Abstract: A detailed analysis is made of the errors made by the system trace, of the mutual relation between trace error and contour error and of the effect on accuracy produced by contour machining, and some computation formulas have been worked out.
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文摘:从进给伺服系统动态响应、滞后特性角度，较详细地分析了跟随误差产生的原因，跟随误差与轮廊误差之间的相互关系和对轮廊加工产生的精度影响，并给出了具体的计算公式。 |
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Abstract: A digital automatic ultrasonic testing system developed for stovetubes of petrochemistry was introduced including the choice of the angle of a transducer and the grading of tubes.
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文摘:介绍自行研制的透射式数字化炉管超声自动检测系统及检测结果，并对超声探头的入射角选取和炉管的分级进行了探讨。 |
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Abstract: A discussion is devoted to how computers affects the artistic activities in the modern ena.The aim of the author is to show the numeral phenomena and the essence of the computer art.
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文摘:通过对计算机在今天的数字信息化时代参与艺术活动的介绍，展示艺术的数位化现象，揭示计算机艺术的艺术内涵。 |
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Abstract: A dual tunneling unit scanning tunneling microscopc(DTU-STM） is developed for nano-metrology.This article describes themeasurement concept and the instrument of the DTU-STM.The crystalline latt ice images werescanned by the DTU-STM to check the
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文摘:研制了用于纳米计量的双元扫描隧道显微镜，介绍了双元扫描隧道显微镜的原理和仪器系统，利用该系统对原子晶格图象进行扫描，验证了纳米计量的可行性，给出了部分被测样品的纳米计量结果。 |
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Abstract: A fall accident of three staffs going by cage at an auxiliary shaft of a mine is analyzed, and the preventive countermeasures are put forward.
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文摘:对某矿副井发生的一起3名乘罐人员坠井事故进行了分析，并提出了预防措施。 |
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Abstract: A fast drag system is designed to simulate the law of speedvariations of a certain power system engine in the process of its start by means of electric power drag and the theory of automatic control and through adopting a new type of electric ma
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文摘:运用电力拖动与自控理论，采用新型电机及变频技术，设计一种快速拖动系统借以模拟某动力系统发动机启动过程转速变化的规律，使该系统能够达到快速启动，瞬间制动，精确跟随事先设定的电机转速变化曲线的目的。 |
