不受时间影响的

Using the time-gain compensation technique to compensate for ultrasonic wave's weaking when transmitting in the air,and reduce the fluctuation of echo signal.The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.

和其他方法相比，如激光测距、微波测距等，由于声波在空气中传播速度远远小于光线和无线电波的传播速度，对于时间测量精度的要求远小于激光测距、微波测距等系统，因而超声波测距系统电路易实现、结构简单和造价低，且超声波在传播过程中不受烟雾、空气能见度等因素的影响，在各种场合均得到广泛应用。

It was impervious to the shocks and mutations of time-it was an emblem of time itself.

它不受时代的冲击或变迁的影响，它自己就是时间的象征。

It is difficult to predict the oil production of a well with the conventional method because of its inordinate change in most cases.

它的优点是：可以实现由任何杂乱无章的数据预测以后某段时间内的动态数据，而且精度不受影响。

Presents the design of longitudinal control for ASTOVL lift-fan aircraft, a multi-variable, strong-coupling, complicated nonlinear system to make the system nonlinear offset and decouple, and the method used for linear system in designing the system to gain expectant flying qualities and the combination of aerodynamic control surfaces with thrust vectors to delay the control surfaces getting into saturation, and the minimum N-norm generalized inverse theorem of weighted generalized inverse adopted to apportion the moments commands, which make the control surfaces gain appropriate deflection and the simulation results to verify the dynamic inverse control laws designed really make the system nonlinear offset and decouple; when one command is given, only this output will response, and others do not response; when all commands are given together, the responses will be just the linear superpose of the response of each command, therefore the operation of the pilot will be simplified greatly.

摘 要： ASTOVL升力风扇飞机是多变量、强耦合、复杂的非线性系统，采用非线性动态逆理论设计控制律以实现系统的非线性对消及解耦，然后，采用线性系统的设计方法对系统进行设计，以使系统获得期望的飞行品质。同时，考虑到ASTOVL升力风扇飞机是由气动舵面和推力矢量融合作用的，为了延缓各舵面进入饱和的时间，采用加权广义逆中的极小N-范数广义逆定理分配力矩指令，从而使各舵面达到适当的偏转角。并将所设计的控制律进行了仿真，结果验证了所设计的动态逆控制律使系统实现了非线性对消和解耦，单个指令作用时，只有该项响应，其余不受影响；所有指令作用时，其结果就等于单个指令作用时的线性叠加，这样使驾驶员的操纵大大简化而易于控制，从而大大降低了飞行事故率。

Ruggedness of an analytical method is the degree of tolerance that the determinating result is not affected when there is small change in the operational condition.

Ruggedness 耐用性指测定条件有小的变动时，测定结果不受影响的承受程度。典型的变动因素有：被测溶液的稳定性，样品提取次数、时间等。

Intranasal endoscopic holmium laser-assisted dacryocystorhinostomy causes no scar in the face, less nasal tissue damage, shorter operation time and less hemorrhage, and does not affect the lacrimal irrigation system, which allows correction of intranasal causes of failure in traditional dacryocystorhinostomy.

鼻内镜下钬激光泪囊鼻腔造孔术后，患者面部无瘢痕，鼻部组织损伤小，手术时间短，出血少，泪液的导流系统不受影响，是传统的泪囊鼻腔吻合手术失败后的良好补救方法。

The essay of " Lu Xun Style " was affected by him. Its ups and downs in the succedent decades is a thought-provoking phenomenon.

受其影响并在其后长达数十年的时间里兴衰起伏、余音不绝的&鲁迅风&杂文，无疑是一个值得深思的现象。

This text surveys nationality's traditional sports course construction of university of Jishou through visiting methods such as the investigation method and on-the-spot investigation method ,etc., result reveal Jishou university build in such aspects as hardware , software and scientific research in the national leading advantaging to nationality traditional course of sports, influence by factors in many aspects and restriction, course construction aspect exist course offer time to be short, there is much content of courses, the knowledge of basic theory is taught weakly , practice has inadequate experience, course offer range to be relatively narrow, think method scientific phenomenon.

本文运用访问调查法和现场调查法等方法，对吉首大学民族传统体育课程建设进行调查，结果显示吉首大学对民族传统体育的课程建设在硬件、软件和科研等方面都处于全国领先优势，但是受多方面因素的影响与制约，课程建设方面还存在课程开设时间短，教学内容多，基础理论知识传授薄弱，实践经验不足，课程开设范围较窄，评价方法不科学的现象。

SODT can not only handle datasets with similar or different distribution between global and local data, but also can make full use of the structure information of the labelled and unlabelled data and produce the same classification results no matter how the observations are arranged.

SODT 算法既能够处理整体数据与局部数据分布相同或不同的数据集，又可以充分利用有标签和无标签数据的结构信息，分类结果不受样本随机重排的影响，而且时间复杂度还与单变量决策树算法相同。

For a variety of quadrochromatic téléphoner, transmission, equipment many out of, this requires the operator has a definite students'aesthetics, should be such that the overall color picture, and the color is closer to its true effect, given a picture of the black and white, a very small area of the hihglights Department may, in part, in the vast network of public interest on a large area, mediation should be retained.

由于各种原稿受时间、传输、设备许多出素的影响，这就要求操作者具有一定的审美观，应使彩色图片整体不失真，颜色接近其真实效果，设定好图片的黑白场，小面积的极高光处可以绝网，但大面积部分切忌绝网，暗调处应保留层次。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。