查询词典 mean time

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。

In the mean time, information technology and digital city construction has gotten great achievements in recent years.

在这样的背景下，作为城市管理领域的一项实践创新，数字化城市管理模式应运而生。

Wickham by each of them; and in the mean time, she went after dinner to shew her ring, and boast of being married, to Mrs.

她很想去看看腓力普太太，看看卢卡斯全家人，还要把所有的邻居都统统拜访一遍，让大家都叫她韦翰太太。

Wickham by each of them; and in the mean time, she went after dinner to show her ring, and boast of being married, to Mrs. Hill and the two housemaids.

吃过中饭，她立刻把结婚戒指显给希尔奶奶和其他两个女佣人看，夸耀她自己已经结了婚。

Wickham by each of them; and in the mean time, she went after dinner to shew her ring, and boast of being married, to Mrs. Hill and the two housemaids.

吃过中饭，她立刻把结婚戒指显给希尔奶奶和其他两个女佣人看，夸耀她自己已经结了婚。

Efficacy: it can quickly and mildly remove makeup and dirt on the face, discompose and remove melanin, help prevent dull skin and realize whitening effect, and help skin absorb whitening ingredient; in the mean time, high-effective moisturizing formula components can supplement moisture quickly and make skin moistening and smooth.

功效：能迅速而温和的清除面部彩妆及污垢，分解并排出黑色素，帮助防止肤色暗沉，达到美白效果，并帮助肌肤吸收美白成分，同时高效保湿配方成分迅速补充水分，无紧绷现象。

This report mainly study the effect on the Chinese beverage industry and national producer which is made by the entry of foreign beverage producer, and reason under the opening environment, and made some elementally thinking of the nation enterprises strategies at mean time.

本报告主要研究开放环境下外资的进入对中国饮料行业及本土饮料生产企业的影响和原因，同时对本土饮料生产企业如何应对外资挑战的对策作一些初步的思考。

With the development of social economy and the raise of people's living quality, the elevated railroad has brought us with great convenience, at the mean time it also can cause environmental vibration which the influence to human's life and work environment has aroused widely attention.

随着社会经济的发展和人民生活质量的提高，高架轨道交通给我们带来快捷和便利的同时，所引起的环境振动对人类生活环境和工作环境的影响已经引起了越来越广泛的关注。

In the last years, because of the emergence of the shortage of energy sources, more and more countries have paid attentions to searching new energy sources, and the problems of how to apply new energy sources are universally noticed. In the mean time, energy conversion fixings become something that people focus.

近年来，随着能源问题的一再突显，寻找合适新能源成为各国所关心的问题，随之而来如何更加合理利用新能源也同样受到普遍关注，各种利用方法中的能量转换设备同样成为众人焦点。

For a repairable system, availability, reliability and mean time between failures are all important indexes. In this paper we discuss the repairable systems with Markov theory. The dissertation develops as follows:In first chapter, introduces the foliation, significance, present condition and prospect in current field of reliability models in repairable system.

本文用马尔可夫可修系统理论，对几个可修系统进行了讨论，全文的结构如下：第一章首先介绍了可靠性理论的起源、可修系统的国内外研究现状、研究的目、研究方法概述以及可靠性在当前各领域的研究现状与前景。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。