Include a field with the current UTC time-stamp in it and check it on the server. If it is too far in the past, or if it is in the future, the form is invalid.
包含一个存储当前UTC时间戳的字段，并在服务端检查它，如果它是太遥远的过去，或者是将来，那么这个form是无效的。
That means the current total of about 50 army combat brigades and marine equivalents in the full-time forces should support about 17 in the field.
这意味着现在总共50个作战旅和等量的全职陆战队应该支撑战区的17个旅。
Field emission stability and life time of CNT cathode is closely related with the vacuum level, thermal effects during the emission and the current transport capability.
影响碳纳米管阴极场发射稳定性和寿命的主要因素有真空度、场发射过程中的热效应以及场发射体对场发射电流的承载能力等。
To provide multicast for multimedia real time services, such as digital audio and video in networks, is one of the important issues in current research field.
在网络中提供数字化音、视频等实时业务的多媒体多播通信是当前的研究热点。
In field emission devices, the emission current sometimes degrades with the time.
在场致发射器件中，发射电流通常会随着工作时间的增加而跌落。
The far field diffractive pattern calculating formula for diffraction antenna with continuous phase structure is derived by current distribution method in antenna theory for the first time.
应用天线理论中的电流分布法，首次推导了具有连续位相结构的反射式毫米波衍射天线的远场衍射图计算公式。
The distribution in discharge space, time change of electric field intensity, electron and ion density and the current density are calculated.
分别计算和分析了介质阻挡放电中电场、带电粒子浓度以及电流密度在放电空间的分布和随时间的演变过程。
The N-S and Possion equations were calculated by using the velocity and pressure modification method at the same time. The surrounding current field at lower Renold number was then obtained.
同时采用速度压力修正法求解n - S方程和泊松压力方程，得到了雷诺数较低条件下的水平输油管线周围的流场分布。
To make the over voltage Vs time function of line trap at short time current test by complex frequency field analysis is introduced in this paper.
用复频域分析法求出试验电流作用以后的阻波器上的过电压的函数。
To be observed on same field in same time, telluric observation is interfered by electric current in measuring the apparent resistivity, and the data are changed to square impulse.
地电场和电阻率同场地观测时，电阻率观测会干扰地电场的观测数据发生大幅度变化。
In low field range, the change of current with time can be simulated by attenuation of power index, and the attenuation coefficient intends to decline with the increase of the applied electric field.
在低场范围中，电流随时间的变化，可以是模拟的幂指数的衰减，并与所施加的电场的增加的衰减系数拟下降。
Our current Moon did not emerge from the Earth, but was captured by Earth's gravity field during this tumultuous time.
我们如今的月亮不是来自于地球，而是在这个混乱的期间被地球的重力场捕获的。
If using the scalar potential instead of the vector potential to analyze the current-carrying regions in a 3d magnetostatic field, the computing time can be greatly reduced.
在三维有限元磁场中，如果对电流区域进行适当处理，采用标量磁位进行分析，与采用矢量磁位相比，可大大提高计算速度。
The3- D Vector and Pattern of Electromagnetic Field and Power Density on a Sphere from an Array of Time Harmonic Current.
弦变线电流阵列在球面上电磁场及功率密度流之时变向量与三维场形。
The3- D Vector and Pattern of Electromagnetic Field and Power Density on a Sphere from an Array of Time Harmonic Current.
弦变线电流阵列在球面上电磁场及功率密度流之时变向量与三维场形。
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