查询词典 stability

The article points out the gas flow stability in the borehole should be divided into quality stability and thermal stability.

文章提出气井在井筒流动的稳定性应分为质量稳定和热力稳定的问题。

At the same time, the variational stability of bounded variation solutions at the effect of perturbation and non-perturbation for the impulsive differential system are discussed, the Ljapunov type theorems for variational stability and asymptotically variational stability for impulsive differential systems are established.

同时，讨论了在无扰动和有扰动的情况下，这类固定时刻脉冲微分方程有界变差解的变筹稳定性，建立了此类微分系统有界变差解变差稳定性和渐近变界稳定性的两个Ljapunov型定理。

First introduction whole wave commutate electric circuit of work principle, immediately after introduction the electric capacity filter the function characteristics of an electric circuit, and in the electric circuit adoption exaltation stability, exaltation temperature stability and limit flow a type over flow protection electric circuit of concrete measure with insure an electric circuit safety stability of work.

首先介绍了全波整流电路的工作原理，接着介绍了电容滤波电路的性能特点，然后引入了具有放大环节和辅助电源的串联可调式稳压电源，并在电路中采用了提高稳定度，提高温度稳定性及限流型过流保护电路的具体措施，以确保电路安全稳定的工作。

Engine room counting fee management application, project structure and expansion solution guidebook A PC product need analysis: Engine room application besides need towards function had special request outside, other summarize to have 4:00:(1) PC fundamental that PC that stability, engine room use is up is everyday 24 hours request for be placed inning openning the machine and circulating the appearance, stability towards PC having more and strictly, then request PC at any time high low temperature start, stanza can manage, power supply manage, inside memory manage and keep on worked deathless machine very and strictly, this is not is what DIY can make to, these factors must be in the product system design inside factor that consider, at the same time at the factor that the machine produce adopt a 48 hour development test the machine can discover latent influence system stability;(2) PC of can manage the sex, engine room as if teach Teach the profession's electronics classroom, and management engine room as if management teacher to electronics teacher, and this is the PC network management, namely on-line management, for example early the machine of many sets proceed together the OS to install, application the procedure install, hardware management, usage supervise and control and report to the police the etc.

机房应用除了对性能有特殊要求之外，其它的需求概括起来有4点：（1）PC的稳定性，机房用的PC基本上是每天24小时处于开机及运行状态，对PC的稳定性有更加严格的要求，即对PC 随时高低温启动、节能管理、电源管理、内存管理以及持续工作不死机的要求非常严格，这并非是DIY所能做到的，这些因素必须是在产品系统设计中考虑的因素，同时在机器生产时采用48小时动态考机才能发现潜在的影响系统稳定性的因素；（2）PC的可管理性，机房如同教育行业的电子教室，对机房的管理如同对教师对电子教师的管理，这就是PC的网络管理，即在线管理，例如初始化多台机器并行OS安装、应用程序安装、硬件管理、使用监控以及报警等管理功能，针对机房PC，专门开发机房管理软件，实现对机房PC的管理；（3）易用性要求，机房PC如同傻瓜PC，在客户端不需要安装、设置，只须开机，满足易用性要求；（4）健康要求：静电、电磁辐射指标、显示器防眩、键盘鼠标抗菌设计及符合人体公学设计。

Major content of this work includes five aspects as follows:(1). Oxygen sensitive materials had been prepared by carrier covalence method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(2). Oxygen sensitive materials had been prepared by carrier covalence-cross linking method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen and spectrophotometer, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(3). For the detection of gaseous oxygen, the fiber optical sensor on basis of oxygen sensitive materials had a respond time of 10s, detection limit of 5ppmand detection precision of 0.5%. The sensor had good repeatability and stability, a less delay and at least 1 year life-span.

本论文主要包括以下五个方面的内容：(1)载体共价法制备氧敏感材料：通过红外光谱、扫描电镜图谱和氧测试实验探讨该氧敏感材料的制备机理，通过氧测试实验评价该氧敏感材料的氧敏感性和稳定性，同时研究了各种因素对该氧敏感材料性能的影响(2)载体共价—交联法制备氧敏感材料：通过红外光谱、扫描电镜图谱和氧测试实验探讨该氧敏感材料的制备机理，通过氧测试实验和分光光度计评价该氧敏感材料的氧敏感性和稳定性，同时研究了各种因素对该氧敏感材料性能的影响(3)氧敏感材料在光纤气态氧传感器中的应用：该传感器的响应时间为10s，检测下限为5ppm，检测精度为0.5％，具有较好的重复性和稳定性，迟滞较小，使用寿命至少为1年，适合各种环境下气态氧浓度的检测。

In-plane stability capacity of I-section aluminum alloy bars under eccentric compressions was investigated with FEA program of ANSYS. The stability of the bars with different slenderness ratio and eccentricity was analyzed and the influence of initial crookedness and residual stresses on the stability was emphatically discussed.

动用ANSYS软体对常用的铝合金压型材偏心压杆的平面内稳定承载力进行了研究，分析了不同长细比和偏心率杆件的稳定性能，并讨论了残余应力与初弯曲对杆件承载力的影响。

This diesis not only summarized and induced the classification of the slope and the influence factors of slope stability, but also summarized and classified the basic and new theories and methods of slope stability analysis, and then try to understand thoroughly and extensively the breakage mechanism and analytical theories and methods of slope stability for choosing the most suitable analytical theory and method of the engineering example research.

本文不仅对边坡的分类和影响边坡稳定性的因素进行归纳和总结，而且对边坡稳定性分析的基本理论与方法以及不断涌现出的新理论新方法进行整理、归纳和分类，力图对边坡变形破坏机制和边坡稳定性分析的理论与方法具有较为全面和深入的认识，为工程实例的研究确定适合的分析理论和方法。

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

Based on the stability condition, the robust stability of uncertain time-delay T-S fuzzy systems subject to actuator saturation is discussed, and the state feedback gain that maximizes the domain of attraction is designed.In chapter 5, a problem of determing stability domain of time-delay T-S fuzzy systems with input saturation is discussed.

在系统参数不确定的情况下，通过构造适当的Lyapunov-Krasovskii泛函，同样给出了该不确定系统的鲁棒稳定性条件，通过求解线性矩阵不等式形式的约束优化问题，可以得到使吸引域尽可能大的状态反馈增益。

Stability of implants was measured by rfa regularly.results there was no significant difference between both groups about stability at all periods and histomorphometry, but isq, bic and ba of experimental group were higher than control group, and isq recovered more quickly in experimental group after loaded.conclusion dual threads design contributes to assure the initial and secondary stability of implants, which is particularly important in poor density bone.

结果 两组种植体在各时期的稳定度差异均无显著性，但在每一时期实验组种植体的稳定度均较对照组高，实验组种植体在负重后稳定度恢复较快，负重3个月后实验组的骨-种植体接触率和种植体周围骨面积均较对照组稍高，但两者差异无显著性。结论双梯形螺纹种植体有利于保证种植体的初期和后期稳定性，应用于低密度骨质优越性会更加明显。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。