电流脉冲

The system adopts CPU board with fast processing elevator operational program, data signal exchange, and HMI screen, which can make sure reliable operation and high speed. It also has PHILIPS SJA1000T field CAN bus, 82C251 Bus interface and the latest serial storage technique to record data. The functions of external watchdog and control chip internal watchdog compose two-level procedure monitoring, so as to ensure the normal operation of the control program. Heavy-current switch power LM2576 ensures the stable system working power, which has low requirements for the power supply. High-speed optoelectronic isolator and internal frequency division technology can make NW3P08-41C (42C) CPU receive the input impulse up to 1-phase 100 KHZ*2 CHANEL or 2-phase 50KHZ*1 CHANEL 32bit.

系统采用原装中央处理板，具有快速的处理电梯运行程序、数据信号交换、显示屏人机界面；确保可靠运行电梯控制程序；且速度快，PHILIPS 公司 SJA1000T 现场 CAN 总线；以及 82C251BUS 接口，最新串行存贮技术记录数据；外部看门狗及控制芯片内部看门狗功能组成两级程序监视，确保控制程序正常运行；大电流开关电源 LM2576 确保系统工作电源稳定，且对供电电源要求低；高速光电隔离光藕及微机内部分频技术，使 NW3P08-41C(42C)中央处理板可接收高达 1 相 100KHZ*2通道或 2 相 50KHZ*1通道，32bit 的计数脉冲。

S waveform non-repetitive current pulse, per Fig.1 and derated above Ta=25℃ pe r Fig.

注释 ： NOTES：1。脉冲电流时间10 / 1000μs 如图1 所示，温度25℃以上降额曲线见图2。

Based on these, pulse flash butt welding function was carried out with the use of the method of joining proportional control and ON-OFF control and current feedback. Welding prcess was automatically controled by Programmable Logical Computer.

在此基础上，以焊接电流作为反馈参数，采用比例控制与ON-OFF控制相结合的方式实现了钢轨脉冲闪光焊功能；采用可编程控制器控制焊接过程，实现焊接过程自动化。

This paper presents a full digital control system for pulsed gas metal arc welding inverter.

设计并实现了脉冲焊电流和弧长的全数字控制，取得了良好的控制性能。

The main advantages of this new design included absence of polarization effect at electrodes and high speed data acquisition due to the simplified filters design. Based on the linear back projection image reconstruction algorithm, a modified LBP method was developed for this ERT system.

该系统采用双极性脉冲电流源为激励电极对提供激励信号，避免了直流激励造成的电极极化效应，同时简化了滤波电路的设计，相对于常规的交流激励ERT系统显著提高了数据采集速度。

With the drive of synchrotron ring magnets as the main target, a new scheme is proposed for producting pulsed large currents with flat top and bottom in a large inductance loading .

以同步加速器环磁铁的激励为主要对象，提出了在大电感负载中产生平顶平底脉冲大电流的一个新的方案。

Secondly, whole-chip ESD protection net is put forward. Input protection circuits, output protection circuits and circuits between high-voltage ground and low-voltage ground are decided on the base of structure and process of PDP drive chip. Moreover, the design of low-voltage VDD-to-VSS ESD protection circuits is detailed and the circuit is simulated with HSpice. Finally, the characteristic of high-voltage device after avalanche breakdown is simulated and analyzed with Tuprem-4 and MEDICI, and it is concluded that high-voltage device can stand high voltage and large current, so the low-voltage VDD-to-VSS ESD protection circuits can be applied to high-voltage VDD-to-VSS ESD protection.

随后提出PDP驱动芯片全芯片ESD保护网络的方案，并根据PDP驱动芯片的结构和制造工艺，介绍了输入部分、输出部分及高低压接口部分的ESD保护电路，然后重点分析了低压电源和地之间ESD保护电路的设计并用Hspice进行了模拟，最后使用Tuprem-4和MEDICI模拟了高压器件在雪崩击穿之后的电压电流和电场分布特性，得出高压器件本身可以承受一定的ESD脉冲，从而将低压电源和地之间的ESD保护电路应用到高压电源和地之间。

No US-pin plastic treatment therapy, a comprehensive alternative to traditional plastic injection of the United States (with the needle and micro-needle) is efficient, non-invasive and safe,"mesoderm into beauty therapy" is the latest technology of water use and water channel protein electrophoresis principle of development Note the infiltration hole electric technology to non-needle injection principle, the use of "point to a plane," AMD permeation technology in skin electroporation Act under the influence of pulsed current stimulation, so that pores have a physical reaction to the rapid spread in two seconds 650-800 of fine pores, forming an instant electronic delivery channels of nutrition, nutrition Note dialysis therapy immediately with electrophoresis, soft laser stimulation and ice, etc., in the most secure and fast, the skin will be required for nutritional products , 99% transmitted to the basal cells, and can be stored as long as 72 hours, the skin smooth and more compact, creating a perfect Beautiful Skin.

无针美塑治疗疗法，是全面替代传统注射美塑的高效、无创，安全的&中胚层导入美容疗法&，是运用最新技术水电泳和水通道蛋白原理研制出的电孔注渗技术，以无针注射原理，采用&点到面&超微渗透技术，其电穿孔法令肌肤在脉冲电流刺激影响下，使毛孔产生物理反应，在两秒内迅速张开650-800个微细毛孔，瞬间形成电子营养输送通道，营养注渗疗法随即展开，配合电泳、柔激光和冰封等刺激作用，在最安全和快速的情况下，将皮肤所需的营养产品， 99%输送到基底层细胞，并可储存72小时之久，令肌肤更紧致柔滑，缔造无瑕美肌。

Ultrasonic method is using low-frequency ultrasonic energy cuticle damage and the Hot perforation technology is using more heat through the skin. Laser technology is in the skin melted on the stratum corneum and the micro-needle device is in the stratum corneum have a micro machine to achieve the purpose of transdermal.

研究活跃的促渗技术包括离子导入（使用低电压电流使药物通过皮肤）、电穿孔技术（使用高压短电脉冲创造暂时的皮肤水性通道）、超声波法（使用低频超声波能量破坏角质层）和热穿孔技术（使用热能使皮肤更具透过性）、激光技术、微针装置来实现透皮目的。

Thus it can deal with not only practical input and output performance, but also the practical firing logic and the changing of voltages and currents of thyristors.

该模型计及了六脉冲交交变频器的实际物理结构及运行过程，不仅可以反映输入输出性能的实际情况，而且可以得到内部各晶闸管的实际触发逻辑和电压、电流的变化规律。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。