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The purpose of this study was to evaluate the shear bond strength between porcelain and electroformed copings after different surface treatments, with comparison of Ni-Cr alloys, to explore the bonding mechanism through observing the electroformed coping surface and interface of metal-ceramic by SEM and EDS analysis. It will provide the basis for clinical application. PartⅠEffects of different surface treatments on bond strength of porcelain fused to eleetroformed copings Materials and Methods: Forty-five cylindrical Ni-Cr alloys were made, and gold copings were deposited on them and divided into 5 groups randomly.

本实验拟测量金沉积基底几种不同表面处理后的金瓷剪切强度，并与Ni-Cr合金进行比较；通过对不同表面处理后的金沉积基底、金瓷界面进行扫描电镜观察和能谱分析，探讨不同表面处理对金沉积金瓷结合的影响，为金沉积烤瓷修复体的临床应用提供参考依据。

In this paper, the acoustic characteristic of bubbles and the interaction with tissue are studied by the experiments of sonoluminescence, the simulations and comparison of dynamics characteristic of gas bubbles and shell encapsulated bubbles, and the interaction between bubbles and tissue using single-frequency mode and dual-frequency mode ultrasound.

本文从空化气泡的声致发光实验、理论求解和比较带球壳微泡和空化气泡的动力学特性，和微泡在单双频超声换能器下的与生物组织的作用效果出发，研究微泡的超声特性以及微泡对生物组织的作用效果。

Calibration of b-y indices by the infrared flux method and surface gravities are calculated from Hipparcos parallaxes, which also allow more accurate ages to be interpolated from a comparison of M〓 and T〓 with isochrones.

利用精确的依巴谷视差计算绝对星等也使年龄的确定更可靠。

In this thesis, the author makes an attempt to analyze advertising language with the comparison of two important pragmatic theories: Relevance Theory by Sperber and Wilson and Grices theory of implicatures.

本论文中作者通过两种理论，即斯伯格和威尔森的关联理论和格瑞斯的会话含义理论的对比，对广告语言进行分析。

By the selection of applicable algorithm module for different hydropower stations in the basin, the optimized results can be managed, analyzed and compared through the directory tree concerned, and then the soft ware feature of integrated management, micro-analysis and vertical comparison is created, which surpasses the mode of study with attention only on single power station and is an innovation in the area of study on the in-plant economic operation of hydropower station as well.

用户可以针对流域的不同电站选择合适的算法模块，通过目录树对流域各水电站的优化结果进行管理、分析和比较，从而形成统一管理、微观分析和纵向比较相结合的软件特性，打破了传统的只注重单个电站优化运行的研究模式，是厂内经济运行研究领域的一种创新。

Agriculture maize as Indicator plant, by raising it in soil with acetochlor, to study the herbicide antidote N-dichloroacetyl-2-methyl-1-oxa-4-aza-spiro-4.4-nonane on protect maize residual damage from acetochlor.the result of experiment is: the growths of maize is lower than comparison value.

以垦玉6号玉米为指示材料，采用土培法研究了除草剂解毒剂N-二氯乙酰基-2-甲基-1-氧杂-4-氮杂-螺[4.4]壬烷减轻除草剂乙草胺对玉米产生的残留药害。实验结果表明：在施用不同浓度的乙草胺土壤中，玉米植株的各项生长指标均低于空白对照值。

On the contrary, Pan-Islamism came into stage.This thesis is aimed at make overall analysis of Nasserism and new Pan-Islamism. The author tries to find the differences between them, answer the question that writer brought forth with the outer factor, and regard them as the clue and study them by means of comparison.

本文将这一问题作为文章的切入点，运用比较研究的方法，力求对纳赛尔主义和新泛伊斯兰主义有一个较为全面的分析，并在对比中找出两者的差别，结合时代的外因去回答文章所提出的问题。

Some primary metering grooves with different curvature radiuses and geometrical dimensions were designed,and the hydraulic characteristics of them were all tested Based on the experiment results, different flow characteristics of them were obtained The great differences between the experimental results and the conventional theoretical predictions were found by the comparison between them Under the condition of this experiment, the critical Reynolds is 1000～1200, and is diminished as the decrease of th...

为了在设计层板发汗冷却推力室时选择合适的一次调节通道，对不同曲率半径、不同几何尺寸的一次调节通道进行了流阻试验，得出了不同几何尺寸的一次调节通道的流动特性。试验结果与经典的层流理论计算结果之间存在较大的差异。试验表明，一次调节通道的临界雷诺数随曲率半径的减小而减小，摩阻系数随曲率半径的减小而增加，并得出了相应条件下的一次调节通道摩阻系数的修正关系式，在层流范围内能较好地反映一次调节通道的流阻特性

In comparison of news professional labor with other ones, it can be found that news ethics is paid more attention to though it comes into being late, that it is greatly influenced by the morality of historians, and that it is applicable partly to pressmen of all kinds though wholly to those of some social class.

它是新闻职业出现之后，新闻从业人员在长期的新闻劳动实践中逐渐形成和发展起来的。由于新闻工作的特殊性，新闻职业道德除了一般职业道德的共性外，还具有不同于其他职业道德的个性特点。从共性方面

In comparison of news professional labor with other ones, it can be found that news ethics is paid more attention to though it comes into being late, that it is greatly influenced by the morality of historians, and that it is applicable partly to pressmen of all kinds though wholly to those of some social class.

新闻道德既有一般职业道德的共性，又有其独特的个性，从新闻职业劳动的特点以及与其他职业的比较中可知：产生的时间晚、被关注的程度高、受&史德&的影响深以及普遍性与阶级性并存是新闻职业道德独具的特点

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。