抗干扰的

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 design does involved research and devisal about anti-jamming from both haedware and software, constructs many concrete anti-interference installation, such as: interference source suppression, channel coupling check, increasing capacity against disturbance of sensor, double contactor mode, digital filtering, add in blank command, install house dog, install software reap, to have a higher reliability.

该系统设计从软件设施和硬件设施两方面进行了对系统抗干扰能力的潜心研究与策划，构建了诸如：抑制干扰源、阻塞耦合通道、提高敏感设备的抗干扰能力、双接触器工作方式、数字滤波、加入空指令、设置看门狗、设置软件陷阱等具体抗干扰设施，从而提高系统工作的安全性和可靠性。

The differential system and pulse polarity discriminating system is improved and the hardware are made which is adaptive for the on-line detection system. The pulse polarity can offer control signal for follow-up sampling unit to do some signal digital processing.

并应用改进的差动平衡法和极性鉴别法研制了抗干扰系统，实验证实该抗干扰系统提高了整个检测系统的抗干扰能力，有利于后续系统对信号做进一步的处理。

Hygrophilous species disappeared partly, and disturbance-resistant species and exotic species expanded their populations in the tourism area;(2) the community structure of bryophytes on the fir trunks in the tourism area was found simpler than that in the undisturbed area; and (3) the trunk at height of 120~180cm was more susceptible to disturbance, but the base was not affected signif icantly by disturbance.

在旅游活动频繁地段，耐荫喜湿物种局部消失，耐干旱抗干扰的植物种群扩大；(2)旅游活动频繁地段树干附生苔藓植物的丰富度、盖度和生物量较未扰动地段小；(3)距地面较高的高度120cm和180cm处受到的干扰强度最大，基部的影响较小。

With the wider use of modern electronic war, the technology of anti-jamming communication becomes the sticking point of military command and fight. Because hybrid DS/FH spread spectrum communication systems combine the good features of both direct sequence spread spectrum and frequency hopped spread spectrum , they increase the interference rejection capability of the systems and are regarded as the most lifeful anti-jamming communication systems in the world.

随着现代电子战的广泛应用，抗干扰通信技术成为保证军事指挥和作战的关键，由于混合直接序列扩频/跳频扩频通信系统将直接序列扩频技术与跳频技术结合，集中了直接序列扩频体制和跳频体制的优点，提高了系统的抗干扰能力，成为国内外公认的最富有生命力的抗干扰通信系统。

First it proposes a method based on chirp rate jittering, through the process of jittering and thresholding, coherent repeat jammings including terrain scattered jamming are greatly suppressed, which displays the potential use for real environment.

针对空域抗干扰技术难于抑制场景散射干扰的缺点，提出了一种基于调频率极性捷变和限幅过程相结合的抗干扰方法，通过脉间捷变调频率极性，并对干扰的匹配结果进行限幅，大大提高了抗干扰效果。

Furthermore, an integrative anti- interference solutions are provided, which are consisted of both hardware ones and software ones. Solutions in hardware include a multi-layer shielding structure and proper groundings of the whole system. Solutions in software include digital data pretreatment based on wavelet, FIR digital filter and algorithm of improved high order sine fit method. They do resolve the corresponding problems in on-site monitoring caused by strong electromagnetic field, noise in signals and harmonic and the fluctuation of power system frequency.

同时建立了以屏蔽结构和接地措施为主体的硬件抗干扰和以小波变换预处理、FIR数字滤波器、改进的tg δ高阶正弦拟合算法为主体的软件抗干扰相结合的综合抗干扰措施，有效解决了现场强电磁场干扰、信号中噪声干扰、谐波干扰以及系统频率波动等问题。

Furthermore, an integrative anti- interference solutions are provided, which are consisted of both hardware ones and software ones. Solutions in hardware include a multi-layer shielding structure and proper groundings o f the whole system. Solutions in software include digital data pretreatment based on wavelet, FIR digital filter and algorithm of improved high order sine fit method. They do resolve the corresponding problems in on-site monitoring caused by strong electromagnetic field, noise in signals and harmonic and the fluctuation of power system frequency.

同时建立了以屏蔽结构和接地措施为主体的硬件抗干扰和以小波变换预处理、FIR数字滤波器、改进的tg δ高阶正弦拟合算法为主体的软件抗干扰相结合的综合抗干扰措施，有效解决了现场强电磁场干扰、信号中噪声干扰、谐波干扰以及系统频率波动等问题。

The design of hardware and software is the emphases of this paper, the hardware circuit board which has an ARM core-S3C44B0 is designed for the special situation and use, for the locoman it is easy to operate and it has a friendly interface. The application software is designed on the embedded operating system-uClinux, it is more complicated than the software which is not base on the operating system, but it has more functions than the latter, furthermore it is steadier when running, and it is easier to design when the operating system has many API functions to use.

本文的重点也在控制部分的软硬件设计上，针对本系统的特殊应用，设计了基于ARM芯片S3C44B0的硬件电路板，它完全满足机车操作人员要求的交互作用好、便携，抗干扰的要求；软件部分采用基于嵌入式操作系统uClinux的应用程序，它与一般的前后台系统下的应用程序相比更复杂，但它所实现的功能也是后者望尘莫及的，并且基于操作系统的应用程序运行更稳定。

However, although it has the reliability which like on states high, antijamming ability stronger, but works as production environment is too bad, electromagnetic interference specially intense, or installs uses is improper, possibly creates the program error or the operation mistake, thus produces inputs by mistake and causes outputs by mistake, this will be able to create the equipment out of control and the disoperation, thus will not be able to guarantee PLC the normal operation, will have to enhance the PLC control system reliability, on the one hand will request PLC to produce the factory to enhance the equipment the antijamming ability; on the other hand, in the request design, the installment and the use maintenance cause highly takes, coordinates to be able in every way to consummate solves the problem, effectively strengthens the system the resistance to interference.

然而，尽管有如上所述的可靠性较高，抗干扰能力较强，但当生产环境过于恶劣，电磁干扰特别强烈，或安装使用不当，就可能造成程序错误或运算错误，从而产生误输入并引起误输出，这将会造成设备的失控和误动作，从而不能保证PLC的正常运行，要提高PLC控制系统可靠性，一方面要求PLC生产厂家提高设备的抗干扰能力；另一方面，要求设计、安装和使用维护中引起高度重视，多方配合才能完善解决问题，有效地增强系统的抗干扰性能。

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。