成对的

Common Reflection Surface stack is a brand-new and special ZO imaging method, the theory of CRS stack stems from paraxial ray theory, the biggest difference between CRS stack and conventional ZO imaging method is that it consider a reflector R as a circular reflector segment Cr placed in the vinicity of reflector R, Cr can be seen as the second order approximation of the reflector. The CRS traveltime surface is the multi-coverage reflection response of the reflector mirror assigned to R.

共反射面元（CommonReflection Surface=CRS）叠加技术是一种全新的、特殊的零偏移距剖面成像方法，CRS迭加理论源于傍轴射线理论，它与普通的零偏移距剖面成像方法的最大区别是它认为地下反射层是由许多个小反射弧段互相叠合组成的，认为来自某反射点附近的一个邻域内的反射信息都可以对该反射点的成像作出贡献，因此对该反射点进行零偏移距成像时就应该聚焦更多的能量参与迭加。

The nucleation effect of nucleating agent HC (mainly containing salt of high molecular carboxylic acid) on polyoxymethylene was studied, and the effects of the nucleating agent on the crystalline morphology, crystallizability and crystallization rate of POM were also studied by means of DSC, PLM and isothermal crystallization kinetics analysis.

研究了高摩尔质量羧酸盐类成核剂HC对聚甲醛的结晶成核作用，采用示差扫描量热分析、偏光显微镜观察及等温结晶动力学分析等方法研究了该类成核剂对POM结晶形态、结晶度、结晶速率等的影响，并考察了其力学性能。

The simulation results demonstrate the rightness and efficiency of FEM. Based on the studies above, the detective characteristics of FMI are examined, a few device structural parameters are numerical analyzed and optimized. The response of each type of formation model is simulated, and gray-scale images are used to express the resistivity results. Adopting 8 electrodes manner to measuring inclined bed, a full-bore resistivity image is obtained, and the relations between the image and the inclined bed are pointed.

在上述工作基础上，考察了全井眼地层微成象仪的探测特性；对有可能影响测量结果的仪器结构参数进行了分析和优化；模拟各种地层模型的测井响应，并用灰度图象表示电阻率井壁成象结果；采用8极板同时测量的方式，对倾斜地层进行模拟测量，得到了全井眼电阻率成象结果，并指出了成象特征与地层倾斜方向之间的关系。

The influence of the relative position and the parameters of the telescope to the luminant characters of space target imaging in space-based telescope were analyzed.

文章分析了天基光电望远镜对空间目标成像时三者的位置关系及其变化对目标光度特征的影响，以及望远镜系统参数对空间目标成像光度特征的影响；给出了太阳直射奈件下的空间目标成像条件。

Based on the analysis and research of the domestic and overseas EIT algorithms, a practical and fast EIT algorithm with better resolution---Fast Newton's One-Step Error Reconstructor dynamic algorithm is studied and realized in this dissertation. Based on a great deal of experiment researches, the EIT algorithm and performance of hardware-measuring device needed by imaging system are analyzed.

本论文在分析、研究国内外有关电阻抗成像重建算法及其研究状况的基础上，研究实现了一种实用、快速、具有一定分辨率的电阻抗成像算法——快速牛顿一步误差重构动态算法，对成像算法进行了大量的实验研究和数据分析，对成像系统所采用的硬件测量装置的性能进行了研究。

Objective: To explore the mechanisms resulting in the recurrence of urethral scar which make urethral strictures difficult to be cured, a series experiments were conducted to find potential effective factors involved in urethral scar formation and degradation, including the studies of extracellular matrix component of urethral stricture scar, the characteristics of urethral scar fibroblast, and the effects of urine on urethral fibroblast in vitro, as well as the studies to compare the difference of collagenase activity, type Ⅰ collagen and tissue inhibitor of metalloproteinase-1 (TIMP-1) in the tissues and cultured fibroblasts from normal urethra and strictured urethra respectively, and the studies to investigate the effect of antisense TIMP-1 oligodeoxyonucleotide on cell proliferation and collagenase activity of urethral scar fibroblast.

中文题名尿道瘢痕基础研究副题名胶原酶活性，TIMP-1的表达及其反义基因治疗外文题名 Experimental study on urethral scar-activity of collagenase，expression of TIMP-1，and antisense TIMP-1 gene transfection of urethral scar fibroblast 论文作者黄翔导师杨宇如教授学科专业外科学研究领域\研究方向学位级别博士学位授予单位四川大学学位授予日期2002 论文页码总数104页关键词尿道手术瘢痕胶原酶成纤维细胞尿道瘢痕馆藏号BSLW /2003 /R699 /12 目的：研究尿道瘢痕的细胞外基质的组成，尿道瘢痕成纤维细胞的生物学特性以及尿液对其生长的影响；比较胶原酶活性，金属蛋白酶组织抑制因子-1（TIMP-1）以及Ⅰ型胶原含量在尿道瘢痕和正常尿道组织及体外培养的成纤维细胞中的差异；研究反义TIMP-1寡核苷酸对尿道瘢痕成纤维细胞增殖以及胶原酶活性的影响。

In order to probe the relationships between wave equation offset domain common image gathers/angle domain common image gathers with migration velocity, we quantitatively derive the changes of ODCIGs and ADCIGs along with migration velocity on the assumption of uniform velocity medium with a horizontal reflector. We come to conclusion that ODCIGs are hyperbolas with half offset; on the contrary, they are ellipses. Combined with the results of depth focusing analysis, we find the apparent incident angles in ADCIGs are larger than the real incident angles when the migration velocity is larger than the true one and vice versa. With lower migration velocity, the residual moveout on ADCIGs is an ellipse with the tangent of apparent incident angle; otherwise, it's a hyperbola.

为了得到波动方程偏移距域共成像点道集和角度域共成像点道集与偏移速度的关系，在匀速单层水平反射情况下，对ODCIGs和ADCIGs随偏移速度的变化进行了定量的推导，得到偏移速度偏小时ODCIGs与半偏移距成双曲关系，反之成椭圆关系；结合深度聚焦分析，得到偏移速度偏大时ADCIGs中视入射角大于真入射角，反之，小于真入射角；在速度偏小时，ADCIGs上剩余时差与视入射角的正切值成椭圆关系，反之成双曲关系。

We carry on studying and designing of drainage pipe imaging testing system comparatively lately. Therefore, it is epoch-making and meaningful that I study the drainage pipe ultrasonic imaging testing system for our country"s online ultrasonic imaging testing system. And it is very much meaningful that we improve our country"s drainage pipe level.

由于我们国家对排水管道成像检测的研究起步比较晚，所以本课题研究的排水管道超声波成像检测系统对我们国家排水管道在线成像检测具有非常重要的意义，同时对提高我国的排水管道检测水平，也具有十分重要的意义。

The reservoir rock types in the region of interest are grain limestone, algal limestone, cryptite, siltstone, muddy limestone and mudstone. The thesis identified as a result of changes in the deposition causing the heterogeneity in plane, and then the geological oil reserves have been calculated in accordance with the areal heterogeneity.3、Based on the data of core analysis, bore logging, array induction imaging log and FMI, porosity and permeability model were built using regression analysis. Through testing 45 rock samples, a, b, m, n value were obtained and used to calculate single-layer oil saturation value using the Archie formula. According to the theory of laterolog and inductolog, resistivity ratio and cross plot were used to identification effective thickness. Effective thickness was identified delicately in 103 wells. Based on the over work, active porosity and oil saturation was calculated accurately.4、According to observation of 100 pieces of the thin slices, cast thin slices and 383m core in three wells, the chief diagenesis in this area were compaction, cementation, denudation and cataclasis. Cementation and denudation were universally influenced active porosity this area. The intergranular pores, residual pores and secondary pores were formed in thin carbonated reservoir of lacustrine facies.5、The influence of reservoir heterogeneity to reservoir calculation was analyzed systematically using actual data. And the conclusions were as follows:①The principal reason leading to oil distribution unequal is interior structural feature of reservoir in structural hydrocarbon reservoir.

确定了由于沉积微相的变化而导致的平面非均质性，进而在平面上按照平面非均质单元计算了石油地质储量。3、利用岩心分析、常规测井曲线与阵列感应、成像测井资料相结合，分岩性利用回归分析方法建立了储层孔隙度、渗透率模型；通过对45块岩样进行岩电试验，获取了a、b、m、n值，利用阿尔奇公式计算了各单层含油饱和度值；根据侧向电阻率和感应电阻率串并联特性，利用电阻率比值法与常规交会图法相结合重建了有效厚度图版，对全区103口井目的层段进行了有效厚度精细划分，通过以上工作，准确求取了储量计算单元内有效厚度参数、有效孔隙度参数以及含油饱和度参数。4、通过对研究区3口井383m岩心观察，100余块薄片、铸体薄片镜下鉴定得出：油泉子油田上、下油砂山组储层主要成岩作用是压实作用、胶结作用、溶蚀作用和破裂作用，其中溶蚀作用、胶结作用最普遍，这两种作用对有效孔隙度影响最大，以上成岩作用形成了原生粒间孔、粒间残余孔和次生孔隙(如粒间溶孔、粒内溶孔、铸模孔、晶间孔等)为主的薄层湖相碳酸盐岩储层。5、利用实际资料，系统分析了油藏非均质对储量计算的影响，认为：①对于构造油气藏而言，油气藏构造及断裂特征是造成油气分布不均的首要原因，储集条件相同的条件下，构造高部位有利于储存油气，油气在垂向的重力分异体现了油气藏内部构造的不均一特征。

The multiphase tectonic activities above clearly controlled the move and gather of salifying brine, the strongth of salt-forming and the deposition of salt-bearing strata. With the pass of time, the salt-bearing strata thickened gradually from northwest to east and southeast, and the distribution of the thickness trended towards complicated; the measurement of the halite deposition extended towards east too; in the early Palaeogene and the Neogene, strong multiphase tectonic activity was a disadvantage to salt-forming, but in the middle and late Palaeogene, weak multiphase tectonic activity, which resulted in slow and sustained subsidence of the basin, was greatly advantaged to it, especially to potash-forming.

古近纪和新近纪成盐卤水的迁移和聚集、成盐作用的强弱以及整个含盐系的沉积发育明显受到上述构造活动的控制：含盐系的厚度随时间由北西向东、向南逐渐增厚，且厚度分布逐渐趋于复杂化；石盐岩的沉积规模和范围也逐渐向东扩大；古近纪早期和新近纪强烈的构造活动对于成盐作用而言是一种干扰因素，而古近纪中、晚期相对较弱、导致盆地缓慢持续沉降的构造活动对成盐，尤其对成钾作用则极为有利。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。