Moreover , aiming at the location of inclined license plate , we have proposed the algorithm based on gray changing characteristic and orientation field . in this section , we discussed in detail the application of mathematical morphology operator in rough locating objective region and introduced the theory and realization method of orientation field . then we used it to detect inclined angel of objective region , finally we can precisely locate and emendate the inclined license plate based on detection result , and so we provided the favorable foundation for segmenting character 此外针对倾斜车牌区域的定位分割问题，提出了基于灰度变化特性和方向场计算的定位算法，其中详细讨论了数学形态学算子在目标区域粗定位中的应用，重点介绍了方向场计算理论和实现方法，并将其应用于目标区域倾斜角度的检测，根据检测得到的结果进行了倾斜车牌区域的准确定位和校正，为后续的字符分割打下良好的基础。
The wind magnitude and wind pressure can be easily adjusted in a wide range with a displaying device avilable . a well - illuminated air suction hood is equipped , which ensures clear observation of the movement of materials . besides , on both sides of the screen there are four holes available that make cleaning easy . the inclination angle of screen can be adjusted within a scope of 7 - 9 . therefore , this machine is able to maintain stone - removing effect even the amount of material fluctuates . it can be used to remove the mixed stones in foodstuffs , grains , grease , feedstuffs and chemical products 调节风量风压方便，且范围大有显示装置，配有大采光吸风罩，物料运动一目了然配有先进照明灯观察，筛体二侧设有四个清理手孔清理方便，去石筛面倾斜角度可可、调范围7 - 9 ，因此本机在产量波动范围之内均能达到去石效果及用于去除不同种类，粮食、杂粮、油脂、饲料、化工其它等的并肩石。
The study of this paper indicates that , the combined binarization method can keep details well and tolerate the abominable state ; the method to estimate skew angle based on radon transformation is very exact , and the distortion of corrected image is also very little ; the vlp location method based on wavelet analysis and intensity moment has a high location exactness and a soon processing time ; and intelligent character recognition machine can accomplish the function of self - adaption , self - correction , self - study , etc 本文研究表明：混合二值化方法能较好的保留图像细节，抗噪声能力强；基于radon变换估计倾斜角度的方法检测角度精确，校正后图像失真较小；基于小波分析和亮度矩的车牌定位方法定位准确率高，速度快；仿人智能字符识别器则能实现识别字符过程中的自适应、自校正、自学习功能等。
The algorithm included three steps : firstly , the text sub - region was selected adaptively according to the feature that the edges contained in text regions was stronger than those in non - text regions ; secondly , the blank bars between two text lines were extracted by blank blocks searching ; thirdly , the skew angle of blank bar was calculated by directional fitting , and this skew angle was just the document skew angle 该方法首先通过对梯度图像的统计分析，自适应地选取到了包含文字的特征子区；在特征子区内，论文把文字行间的空白条带看作一条隐含的线，用优化理论计算出空白条带的倾斜角度，这也就是文本的倾斜角度。
Single - layer model is convenient to apply but the unclear relationship between radiative and aerodynamic temperatures is still a bottleneck in this field . a new method was developed to derive reliable surface heat fluxes from radiative temperature viewed from arbitrary zenith angle . aerodynamic and radiative temperatures are connected through a so - called optimum component fraction ( ocf ) parameter - the fraction of vegetation in the field of view when the two temperatures are equivalent in oblique viewing 该方法利用表面热辐射方向性和显热通量都是源于土壤和植被温度的贡献这一共同点，发现在一定倾斜角度的观测下，视场中植被与土壤的比例可以较好地反映植被和土壤与大气进行湍流热交换的贡献率，所以称该方法为最佳组分面积比法，用最佳组分面积比可以将任意角度下观测到的辐射温度订正为空气动力学温度，经过地面和遥感数据验证表明，用该方法计算的通量精度高于普通的单层模型。
The new structured and film coated open - ended coaxial line , whose open end is inclined , is simulated by using finite element method ( fem ) . reflection coefficients of the same solution , which are measured by different incline probes , are calculated . and reflection coefficients changed as a function of permittivity of the solution at the different frequencies are calculated in order to get the relationship between reflection sensitivity and the frequency of electromagnetic wave 本文采用的是一种具有保护膜且结构新颖的同轴线探头，借助有限元方法进行数值模拟分析，计算出了倾斜角度不同的新型探头测量相同溶液时的反射系数，同时还计算了不同频率下，这种新型同轴线探头所测反射系数与被测溶液介电常数变化的关系，由此分析了其灵敏度与电磁波频率的关系。
