inrush

Water inrush prediction is an important mine hydrogeological work.

突水预报是一项重要的矿井水文地质工作。

It is finally tested by the inrush data of Pinhdinshan Coal Mine.

最后用平顶山矿突水资料进行了验证。

The lower gun-ports were now below water and the inrush sealed the ship's fate.

低层炮眼已经淹没在水里了, 灌进船的水决定了船的命运

On these work,we take the outstanding achievement of no water inrush accid...

这些措施对类似矿区的防治水工作具有一定的参考价值。

The system has realized not only inquiring for water resource of inrush,but also spatial classification.

该系统不但实现了突水水源的点查询,还实现了突水空间分区。

With further analysis comparing, the research generalizes the influence of fault to water inrush.

进一步分析比较,研究总结出断层对底板突水的影响作用。

As a result, voltage sag compensator will suffer from the significant the inrush current.

瞬间的涌浪电流对于电压骤降补偿器造成很大的负担。

Therefore, it is great meaning to research the influences of fault to water inrush in floor.

因此,研究断层在底板突水过程中的作用影响,意义重大。

So setting up fault waterproof pillar is an important measurement which can stop water and prevent fault water inrush.

而留设断层防水煤柱就成为一种堵塞通道、隔断水源,防止构造突水的重要措施。

Make sure whether your balcony and windows are easy for inrush such as cross or shinny.

7. 请检查您家里的阳台、窗户是否容易让其他人侵入,如翻越、攀爬等;

As the inrush current and the precision of the equipments,protection misoperation occurs frequently.

但由于励磁涌流及保护装置精度地影响,差动保护装置容易产生误动。

The expenriment shows that this equipment is fast response, highprecision and without inrush current input.

试验表明:该设备响应快,精度高,实现了无涌流投入。

NTC1 is a negative temperature coefficient (NTC) resistance, used here for limiting the inrush current at cold start.

NTC1(NTC)抵抗负温度系数,用这里在冷开始时候限制那些合闸电流。

The PICO II time-lag fuse is designed for applications that require moderate inrush withstand.

适合在印刷电路板上进行焊锡安装的超小型延时保险丝。

This paper introduces lightning how to imperil and inrush air monitoring station, and the ways to avoid danger from lightning.

摘要介绍了雷电对空气自动监测站是如何造成危害的,阐述了雷电侵入空气自动监测站的途径及防止雷击的办法。

However, without theoretical calculation, serious accidents such as the water inrush in Shanghai Subway Line 4 occurred.

然而,由于计算理论的不完善,也出现过诸如“上海地铁四号线透水”的重大工程事故。

According to the model,applying the cusp catastrophic theory the mechanics mechanism of water inrush is analyzed from key stratum of floor.

当满足关键层失稳的充要力学条件时,承压水底板有可能发生失稳突水。

From investigating at field and laboratory, the coal mining method and its technical parament have a much effect on controling floor water inrush.

通过现场实测和室内研究表明,采煤技术因素对底板突水的影响很大。

Satisfying the sufficient mechanics condition for key stratum instability, a water inrush is likely to happen in the floor.

当满足关键层失稳的充要力学条件时,承压水底板有可能发生失稳突水。

These conclusions are confirmed by 1203 coalface in which water inrush occur but sand inrush not occur when mining in Shen-Fu mining area in shaanxi.

大柳塔1203工作面开采只发生了涌水而未溃沙,这和理论计算的结论基本一致。

It is pointed out that main factors of water inrush of face are fracture developing degree and watery of sandstone aq...

研究结果对煤矿砂岩水害的有效防治具有重要的指导意义。

Hydrogeochemistry survey technology has a double-quick, convenient,economical characteristic in judging source of mine inrush water.

水文地球化学探测技术在判断矿井突水水源方面具有快速、及时、经济方便等特点。

Inrush current is about with the theory of differential protection ,but research exotericas of it is used difficulty in fact.

励磁涌流涉及到差动保护的原理问题,是当前研究地热点之一,但多停留在理论层面。

Attention was focus on high frequency inrush currents and low transition voltage during switching, as well as approaches to solve these problems.

着重研究了投入电容器时的高频涌流及过渡电压降低的现象并提出了有效的改善措施。

If your application requires no inrush protection, simply omit C1, R1, R2, and Q1 and connect S1 between the reference input and 0V.

如果你的应用不需要涌电流保护,干脆省略C1、R1和 R2,并在参考输入和0V之间接入S1。

The calculation result shows that this method is able to detect transformer internal fault and magnetizing inrush current correctly.

计算结果表明该方法能可靠识别内部故障和励磁涌流,效果明显。

A new calculating method for the mechanical behaviours of floors with underground water inrush inlongwall mining is proposed in this paper.

本文针对采场底板的层状结构特征,建立了分析采场底板突水问题的结构模型。

Water inrush in working face and support failure of the driven roadway caused by underground seepage occur from time to time.

摘要地下水渗流导致巷道掘进工作面突水或成巷段支护失效的灾害在煤矿时有发生。

So precise description of ferromagnetic elements" magnetization characteristic is the base of setting up accurate inrush current model of transformer.

因此,对铁心材料磁化特性的准确描述,是建立精确的变压器励磁涌流模型的基础。

How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay.

变压器主保护选择差动在原理上存在不足,带来的问题就是如何准确鉴别励磁涌流与内部故障,这也是目前变压器保护的难点。

Digital simulation shows that the proposed method can distinguish internal fault from external fault, magnetizing inrush current, normal operation.

经仿真计算验证,该方法能有效地区分内部故障和励磁涌流、外部故障及正常运行状态。

An inrush current limiter circuit (20) includes a detection circuit (30) that produces a control signal (VDRIVE) from a sense current (ISENSE).

一种浪涌电流限制器电路(20)包括检测电路(30),其根据感测电流(ISENSE)产生控制信号(VDRIVE)。

The water inrush from conglomerate in the coal mine relatives to the water rich property of conglomerate and the pressure bump.

该矿的砾岩出水除与砾岩的富水性有关外,还与矿井的冲击地压有密切关系。

Zhang Xuesong,He Benteng.A new method to identify inrush current by phasor comparison[J].Proceedings of the CSEE,2005,25(19):43-47(in Chinese).

[3]张雪松,何奔腾.变压器励磁涌流的相移比较鉴别方法[J].中国电机工程学报,2005,25(19):43-47.

Jin D W, Wang Y F, Ma P Z.Dynamics analysis on water inrush through coal bottom stratum[J].Journal of Xi'an Mining Institute, 1997,17(4):354-356.

[5]靳德武,王延福,马培智.煤层底板突水的动力学分析[J].西安科技学院学报,1997,17(4):354-356.

This paper presents an algorithm of comparing quarter-cycle areas to identify transformer s magnetizing inrush using waveform character.

为识别变压器励磁涌流和内部故障电流,提出了利用波形特征识别变压器励磁涌流的1/4周波面积比较法。

Accumulatively, more than 50 water inrush accidents have happened, twice coal mine submerged accidents since the coal mine put into production.

该矿自投产以来累计发生突水事故达50余次,并造成淹井2次。

Hydrogeochemistry survey technology has a double-quick, convenient, economical characteristic in judging source of mine inrush water.

摘要水文地球化学探测技术在判断矿井突水水源方面具有快速、及时、经济方便等特点。

It is found that the two parameters aren"t influenced by external fault and magnetizing inrush current, which ensures good selectivity.

理论上分析可以得到,这两个参数不受外部故障和励磁涌流的影响,因此具有很好的选择性。

In power transformer the main concern lies in the accurate and rapid discriminate between magnetizing inrush and internal faults currents.

电力变压器的励磁涌流识别一直是变压器保护的一个重要问题。

The algorithm also remains stable during magnetizing inrush and over-excitation, and is not affected by changing the core characteristics.

同时该方案不受变压器励磁涌流的影响,并且在内部故障时有较高的灵敏度。

Combined with engineering cases, the mechanism of inrush through fault which is water-inconductive in initial geological condition, has been studied.

结合工程实例分析了原始地质条件下的不导水断层在采动影响下透水并最终导致突水事故发生的作用机理。

Mining on the top of water-pressured, the water inrush in coal floor is a complex nonequilibrium and nonlinear evolution process.

摘要在承压水体上开采时,煤层底板突水过程是一个复杂的非平衡、非线性的演化过程。

The southwest airflow on lower levels and the inrush of arid cold air on upper levels play an important rules on the out-growth and development of this rainstorm.

低空西南气流以及高空干冷空气侵入对这次暴雨的产生和发展起重要的作用。

Gaoyang Iron Mine is a large underground mine with typic complex hydrogeologic conditions and there were many water inrush accidents in construction and mining.

高阳铁矿是一个较为典型的水文地质条件复杂的大水型地下铁矿山,在建设和开采中发生多次涌水事故。

Because of the influence of mining, the permeability of footwall strata varies obviously.Confined water from Ordovician limestone might inrush into gob region.

由于受采动的影响,煤层岩层的渗透能力会发生明显的变化,有时会导致承压水突入采空区。

The in situ rock stress prevents the rise of confined water and water inrush for thick floor aquifuge,but for thin floor aquifuge the in situ rock stress wo...

指出对于厚底板隔水层,原岩应力起着阻止底板承压水上升和突出的作用,对于薄底板隔水层,原岩应力起着破坏底板、导致承压水突出的作用。

Applying the background values of aquifer derived from clustering analysis, a fuzzy comprehensive estimation model was developed for quick recognition of mine water inrush.

摘要应用模糊聚类分析得到的含水层背景值,建立模糊综合评判模型,进行矿井突水水源快速判别。

This paper puts forward a new mechanism of water inrush through the seam floor (WISF).It is emphasised that water inrush is a local destabilization caused by defects.

本文论述了矿井煤层底板突水是一种由缺陷诱导的局域失稳,特别强调存在两种时间尺度的缺陷变化过程。

Based on wavelet transform and multiresolution analysis, a new method to distinguish transformer inrush current from its internal fault current is proposed.

提出一种基于小波变换和多分辨分析识别变压器励磁涌流和内部故障电流的新方法。