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The method is based on the principle of automatic frequency tunning, i.e.

所用的方法基于自动频率微调的原理，即利用一套鉴频系统使反射速调管的振荡频率自动地跟踪到被测腔的谐振频率。

And the traditional passive filter's function is also limited for avoiding the resonance and harmonic enlarging. The auto-compensator and harmonics shielding converter transformer can be used to solve these problems, which is based on the principle of the winding ampere and turn's balance. This paper elaborates this kind of transformer filter mechanism. In the view of the HVDC system, a new winding connection plan is proposed, and the filter optimization model is created.

作者基于自耦补偿与谐波屏蔽的换流变压器，针对某实际的HVDC模拟系统，提出了与该变压器配套的滤波装置的接线方案，并将外罚函数法和遗传算法相结合，对上述滤波装置进行优化设计，建立了以初期投资最小为优化目标、满足系统无功需求的滤波器优化配置的数学模型。

The article elaborated on the principle of the anchor bar support,analyzed supporting effect of driection and support parameter of anchor bar,in the field of changing state adjoining rock strained condition,flexure stress of reinforcing and reducing rock beam.

从改变围岩受力状态、形成挤压加固顶板、加固岩梁及降低岩梁所受的弯应力等方面，阐述了锚杆的支护原理，分析了锚杆的安装方向和锚杆支护参数对支护效果的影响。

Owing to there is substantial, all of columns have been paid close attention by design circle. Base on the principle of "Serve the designer and society", the magazine will continue to make effort to achieve the goal of interaction and communication, And share the experience with readers.

另一方面，杂志社也积极地将优秀的国内设计作品推广到国际设计机构与刊物，为国内设计师搭建走向国际舞台的桥梁，已得到刊载的刊物包括美国的《Communication Arts》，俄罗斯的《Identity》，韩国的《Design》等。

Following the tradition of dragon worship in Chinese culture, and learning from the works of art containing the images of dragon in such folk arts as block-printed Chinese New Year pictures and embroidery, the kite artisans or craftsmen in Weifang have invented the "dragon-headed centipede" of dozens of sections, based on the principle of mechanics and the traditional centipede kite-making techniques.

潍坊的风筝艺人根据我国&尊龙&传统，吸收了当地木版年画、刺绣等民间艺术中有关龙的形象，靠几十节严格按照力学原理系结的&腰子&连缀，在传统蜈蚣风筝的基础上推陈出新，创造出了大型的&龙头蜈蚣风筝&，成为潍坊传统风筝的代表作品之一。

The relationships between surface-water depth and distance from water inlet are fitted by a nonlinear least-square method,and then,based on the principle of water balance a linear regression method is proposed for estimating the soil infiltration parameters of border irrigation.

将畦灌地表水深与离畦首的距离之间的关系按指数函数进行非线性最小二乘拟合，并根据水量平衡原理提出了估算土壤入渗参数的线性回归法，避开了难以定值的地表储水形状系数。

In order to detect whether there is a base gap between the explosive charge and the inner cone of a shell and ensure its fighting performance, this paper puts forward an ultrasonic inspection method of base gap based on the principle of conservation of sound flux in propagation and according to the special construction of the shell .

为了检测出弹体装药与内锥面之间底隙的有无，以确保弹体的战斗性能，本文在超声波传播过程中声通量守恒原理的基础上，根据弹体结构的特殊性，提出一种利用超声波检测弹体内锥面底隙的方法。

Based on the principle of phase equilibrium of fluid, a new model for calculation of pressure distribution in gas condensate well was established in consideration of the effects between temperature and pressure and the effect lead by the change of kinetic energy. The deviation factor is also considered as a function of temperature and pressure in the model.

在流体相平衡理论基础上，综合考虑压力、温度的相互影响及动能变化的影响，同时將流体偏差係数考虑为压力和温度的函数，建立了新的凝析气井井筒压力分佈计算模型。

The compass is a direction finding device based on the principle of north-south alignment of the earth's magnetic field.

指南针是利用磁铁在地球磁场中的南北极性而造成的指向仪器。

Selecting identification index of low-potassium tolerance The correlation between the grain weight per ear stress index and sensitive character stress index is appraised in detail by the numbers based on the principle of highly actuating, simply manipulating, early identification and saving field.

根据穗部敏感性状和穗粒重之间胁迫指数的关系，可以分为不敏感和敏感两类，敏感类型有穗粒数、百粒重、穗轴重三种，各类型存在明显差别。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。