Furthermore , the constraint condition of the transfer function at the zero frequency and the phase invariability condition of transfer function are presented 与传递函数极点的理论关系，得到了传递函数低频约束条件和传递函数相位不发生畸变的补充条件。
A result is acquired that the time correlation characteristics of the fsk / psk radar clutter is invariability , but the space correlation characteristics is enhanced 在第五章中,参考地面搜索雷达的工作方式,对fsk / psk信号的雷达回波进行仿真,并给出仿真结果。
Based on invariability of the quality factor of wavelet transform , combined with proper wavelet group , this paper discusses the application of wavelet transform in the detection of backscatter signal 摘要基于小波变换品质因数不变性的特点，结合适当的小波基，探讨小波变换在回波信号检测中的算法。
Due to the uniqueness and invariability of fingerprints , the automated identification based on fingerprints is becoming an attractive alternative to the traditional methods of identification 由于指纹所具有的唯一性和不变性，以及指纹识别技术具有很高的可行性和实用性，指纹识别成为最流行、最方便、最可靠的个人身份认证技术之一。
Because of uniqueness and invariability , the fingerprint identification is becoming one of the most popular personal authentication technologies , and many fingerprint products have been offered nowadays 由于指纹的唯一性和不变性，以及指纹识别技术的可行性和实用性，指纹识别已成为当前最流行、最方便、最可靠的个人身份认证技术之一。
A separated - parameter method is proposed to calibrate the structure parameter . a vanishing line method is proposed to calibrate the normal vector of light plane and invariability of cross - ratio is proposed to calibrate the baseline length 并提出一种参数分离的方法对传感器进行了标定,采用消隐线法标定激光平面的法矢量,利用交比不变原理标定激光平面的基线长度。
A camera calibration method with co - line points is proposed , in which distortion center is located according to cross ratio invariability , and then distortion coefficients are calculated based on a line ' s central projection is a line 摘要提出一种用共线点列标定摄像机镜头畸变参数的方法，先根据交叉比不变性确定畸变中心，再利用直线的中心投影仍为直线这一性质确定畸变系数。
The system would regulate feed rate instantly to maintain cutting power invariability depend on monitoring the whole machining process at any time . the intelligent control system enhance nc machine adaptive ability and intelligent level . the machining efficiency is improved and the cost of machined workpiece is reduced with the quality guaranteed 该系统对整个加工过程进行实时检测，根据检测到的加工状态实时调整进给速度，维持切削功率约束值不变，以提高数控机床在切削加工过程中的适应能力和智能水平，旨在充分发挥加工中心的加工潜力，在保证加工精度的条件下，提高切削效率，降低工件的制造成本。
The many problems in the present situation of the construction enterprises need to be discussed , such as behindhand technology and equipment , lower labor efficiency , higher labor intensity , the lack of invariability of construction quality , lower operation profit , macro order needs to be improved , different industrial mechanism coexistence 我国建筑施工企业的现状有许多值得深思的问题：技术装备落后；劳动效率较低；劳动强度较大；施工质量缺乏较稳恒的保证；经营效益较差；宏观秩序有待改善；行业间机制多样并存等等。
2 ) based on the invariability ( or approximate invariability ) of function value , we give out the definitions of intent reduct ( or approximate intent reduct ) and intent core ( or approximate intent core ) of concept node , investigate their properties in detail , and prove that the problems of computing them can be transformed into the problem of computing the minimal cover of a family of sets 2 ）在函数取值不变性（或近似不变性）的基础上，提出了概念节点的内涵缩减（或近似内涵缩减）和内涵核（或近似内涵核）的概念，详细地研究了它们的性质，证明了它们的计算问题都可以等价地转化为族集最小覆盖集的计算问题。
