A direct current pulse sequence drives the 3 axes of the transmitter to emit one after another.
此电磁式方位跟踪系统利用一个 3轴线圈分时发射低频磁场，用固定在被测对象上的 3轴磁接收器作为传感器
Complete algorithm is presented for a six-dimensional DC electromagnetic tracking system, of which an experimental prototype is developed. The tracking system employs a magnetic field transmitter and a magnetic sensor, both with 3 orthogonal axes. A direct current pulse sequence drives the 3 axes of the transmitter to emit one after another. The sensor detects the 3 groups of transmitted signals as well as the static magnetic field of the environment, from which the position and orientation of the sensor with respect to the transmitter can be determined.
此系统以正交的三轴发射源和三轴探测器作为传感定位器件，以脉冲直流信号驱动发射源的三轴分时发射，同时接收器三轴探测到相应的三组电磁信号和一个空驱动时间段内的地磁信号，根据接收器在不同方位所探测到磁场差异求得接收器相对于发射源的方位信息。
For the probability of two photon excitation is in direct proportion to the squared intensity of laser, both the femtosecond laser with extremely high pulse intensity and the microscope with high numerical aperture become critical components in the system, and therefore much detail information is provided on this part...
由于材料发生双光子激发的几率与激发光强的平方成正比，所以具有极高瞬时光强的飞秒激光器和可以对光束进行强聚焦的显微镜装置成为系统的关键部件，对此进行了详细的说明。最后，给出了部分利用上述加工系统所获得的初步实验结果。
The object of the filtering is to enhance the direct pulse from the shot and to attenuate the ghost.
滤波的目的，是改善来自炮点的直达脉冲并压制伴随波。
Digital technology is adopted to measure the phase-shift in direct ratio the differentiating pulse width of the two signals.
相位差的测量设计方案采用数字技术对与相位差成正比的脉宽进行计数测量的办法。
The reason that HA granules bring positive charge in absolute alcohol may be related tosurface absorption or association reaction with 〓; EPD includes two process, that iselectrophoresis and deposition, wanting to make EPD go with a swing, a critical voltagevalue Vc between two electrodes must be reached. The edge effect affecting EPD can beweakened through introducing pulse direct-current main.
HA颗粒在无水乙醇中带正电的原因可能与其表面吸附或缔合〓有关；EPD包括电泳和沉积两个过程，要使EPD能顺利进行，两极间电压必须达到一临界值Vc；采用脉冲直流电源可削弱边缘效应对沉积的影响。
Through the studying on EPCD of BG and HA granules in absolute alcohol solution theresults showed that the titanium alloy/BG/HA graded coating be prepared by changingcontinuously the concentration ratio of BG granules with HA granules in the electrophoresissolution and using a pulse direct-current main, the frequency 1200Hz and break-make ratio1/4. When the suspension concentration of HA and BG granules 30g/L and the spacingbetween two electrode is 1.5cm, the preferred deposition technology is that depositionvoltage be 30V and deposition times be 4～6mins.
通过对高硼生物玻璃涂层和等离子喷涂涂层作腐蚀实验研究发现：高硼生物玻璃在制备过程中出现了分相，即分为富硅相和富硼相，在碱性环境中其腐蚀行为表现为均匀腐蚀，腐蚀主要发生在富硼相区，因此，BG配方的设计应尽量避免玻璃分相的发生；等离子喷涂涂层的腐蚀表现出非均匀腐蚀，腐蚀主要发生在熔滴叠层的边缘，且腐蚀有加速趋势，易引起贯通至涂层界面的腐蚀裂纹，从而引起界面渗透腐蚀，这可能是等离子喷涂涂层后期脱落的主要原因之一。
The bulk Ni with various grain sizes were prepared by direct current or pulse electrodeposition, respectively, in the nickel sulfamate electrolyte.
在氨基磺酸镍体系的镀液中通过直流、脉冲电沉积分别制备了不同晶粒尺寸的块体镍。
But along with the technical development in electronics technology and establishment in the power cable distributing parameter theory foundation, it appears the low voltage pulse method and pulse electric current method, and the pulse electric current method is divide into the two kinds of direct current high voltage flashover method and striking high voltage flashover method.
而随着电力电子技术的发展，建立在电力电缆分布参数理论基础上，出现了低压脉冲法与脉冲电流法，而脉冲电流法又分为直流高压闪络与冲击高压闪络两种方法。
In order to avoid RSD abnormal turn-on which leads to spoil, in this thesis, based on the turn-on mechanism and condition, we derive the formula to calculated charge amount supplied by the direct type and oscillating type pre-charge circuits which can be decomposed into familiar circuit models. To get the pulse that needed, the design technique for damp circuit and the way to induce the stray inductance and capacitance are analyzed.
为了避免RSD在开通过程中因预充不足而损坏，本文从RSD的开通机理和正常开通条件着手，对采用直接式和振荡式的预充电路用常见的电路模型进行了分解，分别理论推导出两种电路提供的预充电荷量的计算式，为触发电路参数的选取提供依据；为获得所需的电流脉冲，分析了主回路过阻尼和欠阻尼的设计方法，同时也分析了主回路中的杂散电感及杂散电容，分别给出了两者的估算方法及减小措施。
Effects of pulse and direct current on the microstructure and the spark erosion resistance of electrochemical deposit layer as EDM tool were investigated.
结果表明，采用脉冲电流可以使电沉积层的某些性能得到改善。
The switches are crucial components in pulsed technology and pulsed power technology, whose parameters and characteristics have the most sensitive and direct impact on the breakdown delay time and amplitude of pulse.
开关元件是脉冲技术和脉冲功率技术中重要的元器件，其参数和特性对脉冲的上升时间、幅值等产生最直接、最敏感的影响。
Direct torque control; predictive control; space vector pulse width modulation; torque ripple; induction motor
结合以上分析，采用电压空间矢量法与直接转矩控制相结合的方法，在每个控制周期内选取多个电压矢量来合成目标电压矢量，增加电压矢量的数。。。。。。
The operation principle and design method of a direct pulse encoding modulation SAW oscillator are elaborated.
论述了一种直接式声表面波脉冲编码调制振荡器的工作原理及设计方法。
The response of ultra fast photoconduction detector made of SI-LEC GaAs crystal was studied experimently. The response time to picoseconds pulse laser and sensitivity to 532 nm direct current laser were obtained for GaAs detector.
实验研究了具有极快响应的SI-LEC GaAs光电导辐射探测器的响应，测量它对皮秒级脉冲激光的时间响应及对532 nm直流激光的灵敏度。
In the middle reaches of Heihe River, leaf area index and water consumption of Gansu Poplar (Populus gansuensis C. Wang et H. L. Yang) were measured by direct method and Heat Pulse Meter SF300 made in Australia during growing season, respectively, and the variation of leaf area index of Gansu Poplar and its relation to water consumption were studied.
在黑河中游，利用直接法和热脉冲树干液流仪分别监测了二白杨生长季节的叶面积指数和耗水量动态变化，研究了二白杨叶面积指数动态变化规律及其与耗水量的关系。
Direct digital waveform synthesizer; linear frequency modulated signal; digital-to-analog conlerter; pulse compression
直接数字波形合成；线性调频信号；数模转换器；脉冲压缩
At first, through analyzing the process of coding and decoding, we have demonstrated modified optical duobinary signals have capability in reduction of pulse-to-pulse interaction, and could be directly measured through a conventional binary intensity modulation direct detection receiver.
作者的主要工作及本文的主要贡献如下：第一，提出并证明了三种适合于常规光信号传输系统的新型调制码，包括：改进型光双二进制码、暗脉冲归零码、基于暗脉冲归零码的正交调制码。
Products and Service: DN series data-controlled alternating current projectiong welder ZDN data-controlled commutate spot welder UN data-controlled commutate spot welder DKRDR capacitance energy storing spot welder FN alternationg and ZFNcommutate sewing welder DM direct current pulse spot welder seam welding machine of protectiong by gas for recti or cirol seam varity of special seam welding machine for poine stich AND DKR-350 capacitance energy storing spot welder has been certified whit national patent and DTN-100/DTN-150 has been honored with technology innovation award.
现主要产品有：DN系列数控交流式点凸焊机。ZD数控次级整流式点焊机。UN数控交流对焊机。DKR、DR电容贮能式点焊机。FN交流式和ZFN次级整流式缝焊机。DM直流脉冲式电焊机。直、环缝气体保护焊接专机。各类焊接生产线。其中：DKR-350电容贮能式点焊机获国家专利。
To solve the problems of the limescale, the oxidation which are produced by the direct contact between a metallic conductor and water, the detecting reliability and the service life, the utility model adopts the technical proposal as below: the proposal comprises a monostable controllable trigger, a second low-pass filter, a voltage follower and a display circuit, the power circuit links with the monostable controllable trigger, the second low-pass filter, the display circuit and a timebse pulse circuit separately, the utility model is characterized in that the monostable controllable trigger, the second low-pass filter and the display circuit sequentially links, the monstable controllable trigger separately links with a water lever sensor and the timebase pulse circuit.
为了解决金属导体与水直接接触会产生水垢和氧化，影响检测可靠性和使用寿命的问题，本实用新型采用了以下技术解决方案：它包括单稳可控触发器，二阶低通滤波器，电压跟随器和显示电路，电源电路分别与单稳触发器，二阶低通滤波器，显示电路和时基脉冲电路相接，其特征在于单稳可控触发器，二阶低通滤波器，电压跟随器和显示电路依次相接，单稳可控触发器分别与水位传感器和时基脉冲电路相接。