抗干扰

This paper introduces working principle of tower clock control system in detail from two aspects of hardware and software.

摘要从硬件和软件两个方面详细介绍了塔钟控制系统的工作原理，并阐述了设计中所采取的一些有效的抗干扰措施。

The causes of "PC" getting out of control are studied in this paper and some countermeasure...

研究了"PC"失控的原因，并指出软件抗干扰的几种方法，有效保证单片机系统的正常工作。

Strong technical force, the existing staff of 280 people, including engineering and technical personnel accounting for more than 32 percent of the staff. In 2004 the municipal government approved the setting up of the Dongguan City Cowan interference power engineering and technology research and development centers.

公司技术力量雄厚，现有员工280人，其中工程技术人员占员工32％以上。2004年经市政府批准，成立了东莞市科旺抗干扰电源工程技术研究开发中心。

The optical Crossbar network is a compact architecture, and easy to assemble, in addition insensitive to disturbance.

该光学Crossbar网络具有结构紧凑，抗干扰和易安装的特点。

The result shows that the fuzzy PID control designed systemresponses quickly and does not produce the overshoot basically, it also improves the speed following and anti-interference performance of crosscut machine, can satisfy the control systemrequirement.

仿真结果表明：采用模糊PID控制构成的系统响应速度快，基本无超调，有较好的速度跟随特性和抗干扰特性，能满足横切机控制要求。

As to a lower concentration, though the transmission distance of ultraviolet is tinite, it is far enough to implement our application. Above all, it's safe, cryptical and anti-jamming.

相对较低的浓度值来说，虽然紫外辐射传输有限，但是具有足够远的距离，同时可达到安全、秘密和抗干扰的目的。

Due to the absorption of ozonosphere existing in near-ground atmosphere, the transmission distance is limited in a shorter range, therefore a shortlegged, cryptical, safe and antijamming communication system is constructed, and the conventional antenna is not needed.

由于近地表大气臭氧层的吸收，所以传输距离被限制在一个较小的范围内，构成了短距离的、秘密的、安全的和抗干扰的通信系统，并且不需要传统意义上的天线。

The new generation of Bluetooth chip has better performances in the data transfer rate, transfer reliability and anti-jamming ability, thus it is more suitable to use Bluetooth technology in the industrial field.

新一代的蓝牙芯片在数据传输率、传输可靠性和抗干扰性能方面都较之以前有了较大的改进，因此适合应用于各种复杂的工业环境。

Prevent destructive interference, and noise large and so there is the special requirements of the circumstances.

防破坏性抗干扰，和噪音大等有特殊要求的环境使用。

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。