on projective transformation and involution of nondegenerate second-order curve

1、

some properties of projective transformation on projection plane producing by polar transformation

配极变换诱导的直射变换的若干性质

互联网摘选

2、

projective transformation and affine transformation in pattern recognition

模式识别中的透射变换与仿射变换

互联网摘选

3、

automatic image registration based projective transformation

基于投影变换的图像自动配准

互联网摘选

4、

pigeon egg and white fungus soup

鸽蛋银耳汤

互联网摘选

5、

jasmine and white fungus soup

茉莉银耳汤

互联网摘选

6、

mashed chicken and white fungus soup

鸡茸银耳汤

互联网摘选

7、

Objective To compare the curative effect of three kinds of desensitizer.

目的：比较三种新型牙本质脱敏剂的疗效。

互联网摘选

8、

A new laser scanning and measurement method was introduced for dental model three-dimensional form.

介绍了一种牙颌模型激光三维形态扫描测量分析方法。

互联网摘选

9、

Poor oral hygiene is the major cause of periodontal disease, a chronic infection of the tissues surrounding the teeth.

研究人员说，牙周疾病是一种牙周组织的慢性感染性疾病，口腔卫生差是其发生的一个主要原因。

互联网摘选

10、

Two registration of periodontal bone destruction methods were used with slight modifications. Maxillary specimen radiographs were taken with X-ray machine to measure periodontal bone support ( PBS).

应用两种牙周骨破坏记录方法，摄取上颌骨标本X光片以测量牙周骨支持率（PBS）；

互联网摘选

11、

Objective To compare the antibacterial activities of metronidazole, tinidazole and ornidazole against 4 common periodontal pathogen respectively, in vitro.

目的比较甲硝唑、替硝唑和奥硝唑对4种牙周优势病原菌的抗菌活性。

互联网摘选

12、

Conclusion An appropriate output power of Nd ∶ YAG irradiation may be an effective method of decreasing the microleakage between 3 kinds of normal used filling materials without acid erosion and cavity walls.

结论适宜功率的Nd∶YAG激光照射，对减少非酸蚀的3种常用牙体充填材料与牙齿窝洞界面微渗漏可能是一种有效方法。

互联网摘选

13、

Cytotoxicity of 4 kinds of dental restorative materials on human pulp cell in vitro

4种牙体修复材料对人牙髓细胞毒性的实验研究

互联网摘选

14、

Objective: To evaluate the influence of three dentin desensitizers on shear bond strengths of a total-etch adhesive to dentin surfaces.

目的：研究三种牙本质脱敏剂处理牙本质表面后对全酸蚀粘接剂剪切强度的影响。

互联网摘选

15、

Conclusion: It is a new method to establish a computerized 3-D model of dentition defect.

结论：提供了一种牙列缺损计算机三维建模的新方法，为三维义齿专家系统的开发和计算机辅助教学的发展创建了基础。

互联网摘选

16、

Everyday use of desensitizing toothpastes should be considered and recommended as a noninvasive, inexpensive and efficacious first line of treatment.

抗敏感牙膏是首选推荐的、适合患者自己使用的一种牙本质敏感控制方法。

互联网摘选

17、

OBJECTIVE: To compare the fatigue resistance of vertical fractured teeth after bonding restoration in two different periodontal healing modes.

目的：比较再植后两种牙周愈合方式下，纵折牙粘结修复后的抗疲劳强度。

互联网摘选

18、

METHODS: 4 dental restorative materials were soaked in culture medium ( DMEM) for leachate solution. The effect of each material on viability of pulp cell was measured by the MTT assay.

方法：制备4种牙体修复材料的细胞培养基（DMEM）浸出液，采用四唑盐MTT比色分析法测定材料对人牙髓细胞生长的影响；

互联网摘选

19、

Methods: Microtensile strength of five wet bonding systems was measured on different dry or moist dentin bonding surfaces.

方法：测试和比较5种牙本质湿粘结系统在干燥或润湿的牙本质表面粘结时的微拉伸强度。

互联网摘选

20、

Objective To study the sealing ability of Gallium Alloy as a retrograde root-filling material.

目的：比较镓合金与GK高铜银汞合金两种牙体修复材料的倒封闭性能，探讨镓合金用作根尖倒封闭材料的可行性。

互联网摘选