有效时间

In the paper, by introducing the concept of equivalent statistical time, the detector signal could be analyzed easily and clearly.

本工作通过引入等效统计时间的概念，可简明有效地对系统探测器输出信号进行分析，可较好地描述不同扫描条件下探测器信号的统计涨落特征，并确定多次迭加时探测器信号统计噪声减小的规律，具有一定的理论指导意义。

The given algorithm is simulated in various swaying conditions and compared, with the classical gyrocompassing approach The simulation results indicate that this method effectively improves the alignment performance, and the alignment time of azimuth is shortened by 50% as compared with that iu the gyrocompassing approachin the sam...

给出的算法在几种不同的晃动条件下进行了仿真计算，并和经典的陀螺罗经对准法作了比较。结果说明这种方法有效地改善了捷联惯导系统在晃动条件下的对准性能。在同样的模拟环境下，与罗经对准法相比，方位对准时间缩短将近一倍。

Zhang Min:"TrumpJet" technology sets the dosing point of wet end chemical additives at the outlet pipe of machine screen of the head-box, and uses Booster pump to extract stock as dilution media, and uses "TrumpJet" mixing to inject chemical additives into Headbox loop, which dexterously uses energy of stock in Headbox pipelines, making a very low power consumption in Booster pump (only requires the energy of speeding up for chemical additives flow), eliminating large volume of chemical additives for fresh water dilution, and chemical additives and stock can be fully mixed within 2 seconds, and delivered to model for shaping at the maximum of chemical additives efficiency.

在数千年的造纸发展史上，传统的湿部化学品的加入和混合一直是利用加后稀释水的方法通过静态在线混合器来完成的，由于湿部化学品的加入量很小，，其流量仅为 0.1~1升/秒甚至更小，而要将如此之小的流量加入到纸机流浆箱300 ~2000 升/秒的工艺系统浆料流体中，同时达到化学品与造纸纤维均匀接触，即使是消耗大量的清水和使用在线混合器也很难达到&完全&且&有效&地混合，于是就又产生了将化学品的加入点，提前到远离流浆箱的工艺位置，这样可以延长混合时间，但人们忽略了在过早加入化学品的同时也带来了化学品的流失、化学品在短循环系统循环产生有害副产物生成浆管悬挂、化学品水解失效等一系列弊病。

objective to evaluate clinical effect of the handling protaper nickel-titanium rotary instruments in preparation of canals of posterior teeth.methods 96teeth with pulpitis or periapical periodontitis were instrumented by handling protaper rotary instruments using step-down technique,and by k files using step-back technique for control.all teeth were obturated with lateral condensation methods.the efficiency of preparation was analyzed with ra-diographs before and after operation.results no transportation,apical blockage and ledge were found in test.the technique could keep canals smooth.there were two ledge,one instrument fracture and nine transportation in control.the operative time was shorter and post treatment pain seldom occurred in handling protaper group.conclusion the handling protaper niti rotary instruments can prepare the canals effectively and safety.after the preparation,the canals could be easily washed,sterilized and filled.it is an efficient instrumentation method for posterior teeth's canals and be used widely.

目的 评价手用protaper预备后牙根管的临床效果。方法选取患有牙髓炎和根尖周炎的后牙96例，随机分成试验组和对照组各48例，试验组用手用protaper多锥度镍钛旋转器械逐步伸入法预备根管，对照组用k锉，逐步后退法预备根管，两组均用侧向加压充填法充填根管，根据治疗前后的x线片，评价后牙根管预备效果。结果试验组无根管偏移、根尖阻塞、台阶，且根管壁平滑流畅，无器械折断等并发症发生。对照组有2例台阶形成，器械折断1例，根管偏移9例。试验组操作时间短且术后疼痛轻微。结论应用手用protaper预备后牙根管快速、安全，成形效果好，易于根管冲洗消毒及填充，可视为临床上预备后牙根管的有效方法。

The system uses PID controller and fuzzy controller to design automatic control loops, a study of fuzzy three-element feed-water control system for a CFB municipal waste incinerator is introduced. The incinerator is faced with problems such as large-scale fluctuation of furnace heat load and low regulation resolution of main control feed-water valve. The fuzzy logic control system is applied to modulate PI control parameters according to steam drum water level to fit fluctuated heat load, the inner and outer control loops are realized in an asynchronous way to effectively decrease regulation time and improve regulation precision.

针对垃圾炉炉膛负荷波动较大，同时给水调节阀门执行机构的调节精度较低的现状，在传统三冲量串级汽包水位控制方式的基础上，采用模糊控制策略对内、外串级回路的PI控制参数进行分区域调整，强调了PI参数在被控参量处于不同范围时的分离作用，同时内、外控制回路采用异步控制方式，浙江大学硕士学位论文从而有效地减小了被控参量的调节时间，提高调节精度，使水位波动控制在△为士12~范围内。

General Ruffner, Almond's chief of staff, eulogized his commander, saying, in effect, that never in the history of the U.S. Army had a corps in such a short time done so much.

拉夫勒将军，阿蒙德的参谋长，赞扬他的军长说，美国陆军的历史上从未有过哪个军能够在如此之短的时间内有效地完成如此繁重的撤离任务。

The result showed in the conditions of 115℃ and 3.5h the oil sands were effectively extracted to obtain the oil content in the presence of 120(superscript #) solvent naphtha as extraction solvent.

实验结果表明：选用120溶剂油为抽提试剂，在抽提温度为115℃、抽提时间为3.5 h的条件下，可有效的把油砂油从油砂中抽提出来，从而根据重量法测得油砂油含率。

The result indicates that more than 6 minutes for safe evacuation could be attained by smoke-preventing air curtain; moreover, the quantity of fresh air could be reduced compared with the traditional ways.

结果表明，在楼梯口设置防烟空气幕不仅可以保证人员在6分钟以上的安全疏散时间，而且减少了比传统方式所需的新鲜空气量，有效阻止火灾的进一步扩大和控制烟气扩散。

Sixth-grade students ' time management and knowledge management may serve as predictors of their academic achievement.

五、国小六年级学生的时间管理实行程度与知识管理能力有效预测学业成就。

In order to solve the above problems, a scalable multicast routing protocol with QoS constraints is proposed in this dissertation at first. It could absolutely make distributed computering into realization and then solve the problems successfully by the integration with local search and global search、single-branch search and multi-branch search.

本文从研究现有多播通信模型以及QoS约束的多播路由协议和算法出发，首先提出了可扩展的QoS多播路由协议MRPQoS(Multicast Routing Protocol with QoS constraints)，它将局部搜索与全局搜索、多分支搜索与单分支搜索有机的结合在一起，有效解决了同类协议消息复杂度高、寻路成功率低以及连接建立时间比较长等问题。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。