The fuzzy exponential smoothing model has been used for short - term forecasting with a minimum of collected data or unknown system structure to determine a better extrapolative interval in a fuzzy set for an unknown future trend 摘要模糊指数平滑模式对于资料量稀少或系统结构模糊不清之问题，能求解吻合资料未来趋势的外差模糊预测值，以成功求解未来不确定高的短期预测问题。
Be different with other botdr systems , the coherent self - heterodyne botdr system uses only one consecutive laser . the light from consecutive laser is divided into two beams , the detecting light and the reference light , by a coupler 与其他的botdr系统分别使用两台激光器不同,自相干外差的布里渊散射分布式光纤传感系统采用一台激光器,经耦合器分为两路光束? ?探测光和参考光束。
After discussing this kind of filter in this paper in detail , the grads algorithm in time domain and frequency domain is set up when the change of frequency is slow , so it means the algorithm only process the narrowband interference what it changes slowly 论文对数字自适应外差滤波器进行了详细的研究，建立了自适应外差滤波器的时域和频域的梯度算法，该算法的推导使用了外差频率变化缓慢的假设，这意味着该滤波器只能够处理慢变的窄带干扰。
1 solid - phase extraction of barbitone - - ultraviolet differential derivative spectrophotometry in this paper the solid - phase extraction and uv differential derivative spectrophotometry quantitative determination method for 5 of drugs , including barbital , phenobarbital , pentobarbital , amobarbital and secobarbital in blood , urine , liver , kidney , lung and brain 1巴比妥药物固相萃取? ?紫外差示导数光谱检测法本文建立了血、尿、肝、肾、肺、脑中巴比妥、苯巴比妥、戊巴比妥、异戊巴比妥、速可眠的分析方法。
This paper analyzes the non - symmetry of elliptic polarization oftwo linear polarized beams , which are perpendicular to each other , caused by their reflecting from a metal mirror . also , it studies the non - linear error created by polarization and how the errors change . the study is very important for improving the measuring accuracy of polarized heterodyne interferometer 主要分析两束相互垂直的线偏振光经过金属反射镜反射后引起的椭圆偏振化的不对称性，并研究由此产生的非线性误差的变化规律，这对提高偏振光外差干涉仪的测量精度是极为重要的。
The signal - to - noise ratio of the nondestructive testing system employing optical heterodyne and ultrasonic techniques is analyzed and calculated from two aspects including phase matching of optical heterodyne measurement in nondestructive testing and the effects of beam incidence on the intensity of heterodyne signal and signal beam 对光外差超声无损探伤系统的信噪比从两个方面入手进行了计算分析:第一,光外差测量在无损探伤中的相位匹配;第二,光束入射角对信号光光强和外差信号强度的影响。
The double - frequency laser interferometer belongs to the heterodyne interferometer . it has been proved that this kind of interferometer possesses the advantage of having a higher transform gain , better wave - filter capacity and high spatial resolution . furthermore , this kind of interferometer can filter out background light interference and obtain a measuring signal with high signal / noise ratio 双频激光干涉仪是一种外差干涉仪，理论分析证明：外差干涉具有高的转换增益、良好的滤波性能及优异的空间鉴别能力，能有效地滤除各种背景光干扰，得到信噪比很高的测量信号。
By observing the effect of acidity on the uv difference spectra of ehpg or hbed , the spectral characteristics of apoovotransferrin binding to metals and anions at ph 7 . 4 show that the reaction of apoovotransferrin with metals is related to deprotonation of the phenolic group of tyrosine of the metal binding sites , while the binding of apoovotransferrin to anions is associated with the protonation of the phenolic group of tyrosine of the anion binding sites 摘要通过观察酸度对模拟转铁蛋白小分子ehpg和hbed紫外差光谱的影响，结合脱铁伴清蛋白与金属离子、阴离子结合的光谱特性，推断脱铁伴清蛋白与金属离子的结合导致金属离子结合位点处酪氨酸酚羟基的去质子化，而与阴离子的结合导致阴离子结合位点处酪氨酸酚羟基的质子化。
In order to improve the existing pr adaptive optical heterodyne detection system ( praohds ) , a new praohds is proposed based on sppc and mppc coexistence . the experimental study of the system is completed by equal amplitude ar + laser beams , poorly coherent equal amplitude solid - state laser beams and high speed amplitude - modulated solid - state laser beams through distorting media . experimental results indicate that the new system is applicable 为了改进现有的光折变自适应光外差探测系统( praohds ) ，本文利用sppc和mppc同时共存的特性，提出了一种新型的praohds ，并利用ar ~ +等幅激光、相干性较差的固体等幅激光以及固体高速振幅调制激光对新系统进行了畸变光束的自适应光外差探测实验研究，结果证明了新系统在实际应用中的可行性。
Abstract : this paper analyzes the non - symmetry of elliptic polarization oftwo linear polarized beams , which are perpendicular to each other , caused by their reflecting from a metal mirror . also , it studies the non - linear error created by polarization and how the errors change . the study is very important for improving the measuring accuracy of polarized heterodyne interferometer 文摘:主要分析两束相互垂直的线偏振光经过金属反射镜反射后引起的椭圆偏振化的不对称性，并研究由此产生的非线性误差的变化规律，这对提高偏振光外差干涉仪的测量精度是极为重要的。
