查询词典 Labrador Current

Shim current calculationWhen shim coils are excited by appropriate current, they can generate correcting magnetic field to compensate the imaging magnetic field unhomogeneity. Based on the indirect calculation method, we proposed a novel iterative optimization algorithm to calculate shim current. Because there is a direct proportion relationship between FID signal and magnetic field homogeneity, we use the intensity of FID signal as feedback information to the calculation. Shim current can be worked out in less than 3 minutes. This satisfied the requirement that active shimming should be performed in real time.

5匀场电流计算对匀场线圈施加适当的电流后才能产生校正磁场消除成像磁场的非均匀分量，本文在匀场电流间接计算方法的基础上，利用磁共振成像原理中磁场均匀性与系统FID信号强度成正比的关系提出了一种电流迭代优化算法，将系统FID信号强度的变化作为反馈信息，能够快速计算出匀场电流对成像磁场进行补偿校正，平均耗时不到三分钟，满足磁共振成像系统对有源匀场的实时性要求。

In the environment where it is higher than thermodynamics zero degree, current pulse of faitness is produced by the movement electron in the resistance, it forms the noise current of resistance by addition, the higher the temperature in resistance is, the acuter the electron movement will be, the bigger the noise current will be, therefore the resistance of the thermal noise current is formed.

作者单位：（攀枝花学院电气信息工程学院，四川攀枝花 617000）摘要：在高于热力学零度的环境下，在电阻体内存在大量由运动电子而产生的微弱电流脉冲，经过迭加形成电阻的热噪声电流。

The results showed that the W content in the electrodeposits rose with the increasing of cathodic current density in the solution containing ammounium citrate as complexing agent,whereas the current efficiency remained approximately constant. When the current denisity was higher than 15 A/dm2, the W content in the alloy was not obviously changed, but the current efficiency remarkably decreased.

结果表明，在以柠檬酸铵为络合剂的镀液中，沉积层的W含量随电流密度的增大而增加但电流效率变化不大，当电流密度超过15A/dm2后，镀层的W含量不再发生明显的变化而电流效率却明显降低。

Returns the current hook settings of the thread, as three values: the current hook function, the current hook mask, and the current hook count (as set by the debug.sethook function).

返回线程当前钩子的设置，包括3个值：当前钩子函数、当前钩子掩码和当前钩子计数（在debug.sethook函数中设置）。

Circular electric current is a classical physical model. The researches on the magnetic field distribution characteristics of the circular current are helpful for the further study on magnetic characteristics of magnetic dielectric. The ellipse electric current is a typical physical model of ring-like electric current.

圆电流是一个经典的物理模型，对圆电流磁场分布特性的研究有助于进一步研究磁介质的磁性特征；而椭圆形电流又是环形电流中一个典型的物理模型，对椭圆形电流磁场分布情况的研究，将让我们进一步认识环形电流的磁场问题。

Due to capacity increase or structure change of the power system, an extra-high current possibly 100 times of the rated current may appear in some circuits of the power system when a short-circuit fault happens nearby. This current is extra high and exceeds the permitted value of 10% error curve of protection current transformer.

在电力系统中，各回路的最大故障短路电流和额定工作电流的比值应在合理的范围内，以保证保护用电流互感器的工作精度，但由于系统容量增大或因系统结构等原因，某些回路在某些情况下的最大故障短路电流远远超过了正常范围。

Moreover, second-winding current waveform of a current transformer is calculated under the transient current of the typical short-circuit fault by numerical method. The analysis shows that the relevant protection equipment may refuse to trip when the fault current is extra high. It will result in the maloperation of protective relays for loss of their selectivity, and cause other protective relays to operate beyond range, and extend the scope of shutdown of power supply.

在这些回路出口处发生相间直接短路等严重故障时，流过相应TA一次侧的故障电流可能达到TA额定工作电流的100倍以上，大大超过了保护用TA的10%误差容许倍数，将使TA严重饱和，从而影响相关的保护设备的动作性能，因此有必要对在这种特大电流作用下的TA的传变特性做一些探讨，以分析其对继电保护装置动作特性的影响及应采取的措施。

We have found that, within the physical ranges of the model parameters, the correlation functions of hole hoppings giving rise to closed current flow patterns in the circulating current phases are substantially larger than those of hole hoppings corresponding to open current flows. This provides the evidence for the existence of the circulating current phases in the three-band Hubbard model.

通过模拟发现，对应于闭合曲线的关联函数在同一距离上要比其他所有没有闭合的关联函数大得多，因此证明在三带Hubbard模型中存在环形电流相。

Using harmonic analysis of the calculated tidal level and current, the distributions of co-tidal lines for K1, O1, M2 and S2 are obtained, whose maximum amplitudes can reach 112 cm, 96 cm, 50 cm and 15 cm, respectively. The distribution of the maximum probable current velocities in Qinzhou Bay is basically the same as that of isobaths, and the maximum probable current velocity can reach 200cms^(-1) nearby the Longmen Harbor. It is concluded by the analysis of K1 and M2 tidal current ellipses that the flow is rotating at the mouth of the bay, while its retilinear flow is in the nearshore area, estuaries and channels. The distributions of the major axes are closely related to the topography, and the rotation directions of both constituents are clockwise.

根据模拟结果计算得到了较以往更为精细的钦州湾K1、O1、M2、S2分潮的同潮图，潮汐最大振幅分别为112、96、50和15cm；最大可能流速的分布基本与等深线一致，龙门港附近最大可能潮流流速可达200cms^(-1)；钦州湾的外湾口海域开阔，一般为旋转流，近岸海区及水道、河口等多为往复流，K1和M2分潮流椭圆长轴的分布与地形密切相关，旋转方向均为顺时针，流速极值出现在龙门港区。

Other conclusion include: the trip of transient protection must be locked when the power circuit breaker of transimission line operated,because the trip is incorrect at this time;the features of transient current and its energy is different between the fault and thunder over- voltage in transimission line,and them can be identified;the ratio of high frequency component of current in serise capaciters compensation line , SVC and HVDC system is far little than fault transient current, so all of them do not affect the working of trasient current protection.

研究了在串联补偿电容的输电线路上发生故障时，串联补偿电容的MOV非线性保护电路对暂态保护的影响。串补电容MOV保护电路的非线性电流高频分量含量很小。静止补偿器、高压直流输电系统换流器的非线性特性产生的谐波分量含量极少。仿真计算表明，在与暂态保护判据中高频分量对应的频率范围内，其电流对应的功率谱估计值大大低于线路故障时故障电流的功率谱估计值，因此它们都不会对暂态电流保护的正常工作产生影响。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。