进行中

The ordinary edge detection methods such as Sobel and Canny operators are immune to noise, which result in cophasal axes discontinuity due to lack of edge information caused by noise.

由于边缘检测中常用的Sobel算子和Canny算子检测同相轴时对噪声免疫差，常因噪声因素引起边缘信息缺失导致同相轴提取不连续，本文采用中值滤波并对Sobel算子进行改进，对地震剖面图进行预处理，结合均方差自动确定阈值并进行异常检测，提取完整同相轴。

The ordinary edge detection methods such as Sobel and Canny operators are immune to noise, which result in cophasal axes discontinuity due to lack of edge information caused by noise. In order to extract cophasal axes more continuous and immune to noise, a novel approach is developed based on edge detection. Firstly, the median filter and improved Sobel method are used to preprocess seismic section images. Secondly, the threshold value is determined automatically based on variance to detect abnormal information. Finally, the complete cophasal axes are extracted after a post-processing.

由于边缘检测中常用的Sobel算子和Canny算子检测同相轴时对噪声免疫差，常因噪声因素引起边缘信息缺失导致同相轴提取不连续，本文采用中值滤波并对Sobel算子进行改进，对地震剖面图进行预处理，结合均方差自动确定阈值并进行异常检测，提取完整同相轴。

The morphological and cytopathological characters of the viruses were observed by electron microscopy The types of virus were identified with I-ELISA, DAS-ELISA, TAS-ELISA, RT-PCR and IC-PCR. The CP genes of the main viruses identified in this research were amplified by PCR, cloned into pGEM-T and sequenced. The pumpkin germplasm from Heilongjiang and Yunnan provinces was screened for resistance to the main viruses using friction and roots immersed inoculation.

应用电子显微镜负染法和超薄切片法观察病原粒体形态及细胞病理学特征；利用酶联免疫吸附测定法中的双抗体夹心ELISA、间接ELISA、三抗体夹心ELISA以及反转录聚合酶链式反应、免疫捕捉PCR方法鉴定了采集样品中的病毒种类；对被确定为南瓜主要病毒病原的外壳蛋白基因进行了PCR扩增，克隆到pGEM-T载体并进行测序；应用摩擦接种法和浸根接种法对云南、黑龙江省部分南瓜品系、品种进行了抗性筛选。

The Chinese people are always hoping that the world is at peace and people of all nations will coexist friendlily.

时态有时可以体现一种感情因素，特别是进行时的使用，比如在第一个例子中现在进行时的使用体现出对中华民族的一种褒扬、赞美的口吻，翻译出了这句话的&精、气、神&，最后一个例子中过去进行时时常表示一种&特有的行为&，通常是偏向于negative的口吻，所以我们发现这句话十有八九是美国人自己写的。

Abstract］ Objective To Treating the nano-SiO2 particle by silicon coupling reagent, functionalize the SiO2 by making double bond on its surface. Polymerizing on the surface of nano-SiO2 surface by the method called emulsion polymerization, the nano-SiO2 is covered by polymer to get the PMMA-KH-570-nano-SiO2 complex material. Test the surface structure of the surface of nano-SiO2 by FTIR, and test sort of its mechanical performances.Comparing the treated nano-SiO2 which is directly dispended in the PMMA emulsion with the SiO2 without any treatment, we are trying to find an effective method which can not only increase the dispersion of SiO2, but also improve the mechanical performance of the artificial teeth.

目的 通过硅烷偶联剂KH-570处理SiO2纳米粒子，向其表面引入双键使其功能化，采用乳液聚合的方法在SiO2纳米粒子表面进行接枝聚合，实现高分子对SiO2纳米粒子的表面包覆处理，制得PMMA－KH-570－SiO2纳米复合材料，采用FTIR对SiO2纳米粒子表面结构进行了表征研究，并且测定了它的多种机械性能，与表面处理过的SiO2纳米粒子直接分散至PMMA乳液中制得的复合材料、未添加任何增强物质的空白组进行比较，探索一种能够提高SiO2在基体中的分散性，为义齿复合材料的研究和开发提供理论依据和参考。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

On the license location,the projection was used to locate the license plate; On the characters segmentation, the liminal rule was used to divide the characters; In order to solve the problem of the digital characters recognition in the plate, BP nerve network was used to recognize the digital characters.

本文对车牌识别系统中的车牌定位、字符分割和字符识别进行了初步研究。对车牌定位，本文采用投影法对车牌进行定位；在字符分割方面，本文使用阈值规则进行字符分割；针对车牌图像中数字字符识别的问题，本文采用了基于BP神经网络的识别方法。

Optimized and calculated geometric structure and infrared spectrum of benzoic acid molecule with density functional B3LYP method on 6-311G ** base cluster level,and compared the calculated infrared frequency of each conformation of benzoic acid with actually-measured infrared spectrum,thus determined molecula.

用密度泛函 B3LYP方法在6-311G**基组水平上对苯甲酸分子的几何结构和红外光谱进行了优化和计算，并将计算所得的苯甲酸各构象的红外频率与其实测的红外光谱进行比较，确定了在晶体中苯甲酸的分子结构，同时在计算中给出了各种频率所对应的红外强度，对光谱进行了归属。

The non-structure grid is used for complex irregular boundary processing. An efficient algorithm PISO is used for the model and it can correct the bias of the mesh, so it can reduce iterative times. The flow pattern, energy dissipation ratio and velocity field are obtained.

根据不同的运行工况，利用计算流体力学软件FLUENT对无压隧洞洞内消能工的水流流态进行了二维简化数学模型的数值模拟，在求解过程中采用混合结构网格来处理复杂的边界形状；采用了效率较高PISO算法进行计算，在计算过程中进行了相邻校正和偏斜校正，减少了达到收敛所需的迭代次数。

Practice of advance grouting of pump house in Hexi Gold Mine;2. The method of pipe anchor of advance grouting is adopted to avoid flowing sond and piping It argues the mechanism of advance grouting in waterproof and reinforcement.

本文介绍了在基坑喷锚支护工程中，采用锚管预注浆法对基坑边坡进行超前支护，防止流砂及管涌，并对预注浆法的止水及加固机理进行了探讨，分析了浆液在砂土层中的扩散及胶凝等过程，通过土方开挖验证了注浆效果，使喷锚支护能够顺利进行。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。