查询词典 boundary surface

In feature-based reverse engineering, with the research of surface feature handling done wieldy and deeply, a methodology of surface-feature based re-modeling has come into being, with which the quadric surface, simple free-form surface and blend surface feature can be directly extracted from point cloud conveniently.

目前，在基于特征的反求工程中，有关曲面特征处理的研究已经比较深入，可以方便的直接从点云数据中提取二次曲面特征、简单自由曲面特征和过渡曲面特征，基本形成了一种基于曲面特征的反求工程CAD建模方法。

Some methods of surface functionalization of hollow glass microsphere are reviewed, such as surface coating, surface grafting, surface metallization and surface zeolitization.

综述了空心玻璃微球表面包覆、表面接枝、表面镀膜、表面沸石化等改性方法，并就其在隐身、环境等领域的应用进行了探讨。

The weight percentage for the components of the hyaline coating is as follows: SiO2 45 to 54 percent, B2O3 15 to 20 percent, one or more of Na2O, K2O and Li2O, 10 to 24 percent, one or more of TiO2, ZrO2 and ZnO, 6 to 18 percent , and the rest is one or more of CaO, MgO and CeO2. Firstly, the glass powder is mixed with the mill additions to be pulped and then plated on the surface of titanium or the titanium alloy. After being dried, the surface of titanium or the titanium alloy is directly used for a thermal hydrogen treatment or smelted at a temperature of 900 to 1, 000 DEG C for 15 to 30 minutes and then a hyaline coating with a thickness of 20 to 70 micrometers is formed on the surface of titanium or the titanium alloy; secondly, titanium or the titanium alloy plated with the coating is conducted a thermal hydrogen treatment. After the treatment technique is finished, the coating flakes off automatically in the process of cooling; and finally, a surface treatment is supplemented to meet the requirement of the workpiece surface.

该玻璃质涂层成分按重量百分比：45-54SiO2，15-20B2O3，10-24Na2O、K2O、Li2O中的一种或多种，6-18TiO2、ZrO2、ZnO中的一种或多种，余量CaO、MgO、CeO2一种或多种，将玻璃粉与磨加物混合制浆并涂覆在钛或钛合金表面，干燥后直接用于热氢处理，或在900-1000℃下熔烧15-30min，在钛或钛合金表面制得20-70微米玻璃质涂层，随后将制有该涂层的钛或钛合金置于氢气气氛下进行热氢处理，处理工艺结束后，涂层在冷却过程中自剥落，最后辅以表面处理即可满足工件表面要求。

Basic symbols;Coatings;Definition;Definitions;Dimensions;Drawing specifications;Drawings;Engineering drawings;Finishes;Geometric;Geometrical product specification;GPS;Graphic representation;Graphic symbols;Inscriptions in a drawing;Letterings;Machining;Machining tolerances;Marks;Product specifications;Production processes;Products documentation;Ratings;Reference length;Reference lines;Representation of characters;Roughness;Roughness value;Specification;Statement;Surface properties;Surface roughness;Surface texture;Surface treatment;Surface-roughness measurement;Surfaces;Symbols;Technical drawing;Treatment;Wear-quantity

中文标题产品几何量技术规范。技术产品文件中表面结构的表示方式中文主题词图形表示；参考长度；尺寸；加工公差；表面性质；产品规范；覆层；制图规范；精整；表面粗糙度；粗糙度；表面粗糙度测定；表面结构；磨损量；图纸标题；表面处理；技术制图；几何的；基准线；图形符号；符号；标记；加工工艺；文字书写；产品文件；定义；表面；粗糙度值；工程图；额定值；产品几何量技术规范；GPS；叙述；处理；图纸；机械加工；字符表示；基础符号；规范验收

Section method is to split the pit slope surface into several trapezoids so as to calculate their surface area;through a digital survey of the pit slope surface,a numerical elevation model is set up,on the surface the triangular mesh is built,and all the triangular meshes are piled up to get the surface area.

小三角锁法是通过对宕口坡表面数字化测量，根据测量数据建立数字高程模型，并在表面建立小三角锁，对所有小三角的面积累加得到面积的一种方法。小三角锁法大大提高了计算的准确度和效率。

The result showed that the surface architecture and ultrastructure of I.punctatus ' gill and secondary gill lamellae were similar to those of other teleosts. The surface of gill arches and gill rakers was covered with pavement cells which were characterized by circular microridges, and secreting-holes were found among cells on the surface of gill arches. The base part of gill rakers were bigger in terms of diameter. The pavement cells' surface of gill filaments' middle part was characterized by microridges with fine lateral protuberances on both sides which were either fused or interruped, while the microridges disappeared on the pavement cells' surface on both top and base parts of gill filaments, forming dense granulated protuberances. The height and interlamellar space of secondary gill lamellae in I.punctatus were relatively higher and bigger, respectively.

结果表明，斑点叉尾鮰鳃的表面结构和微细结构与其他硬骨鱼类基本相似，鳃弓和鳃耙表面被具环形微嵴的扁平上皮细胞所覆盖，鳃弓表面细胞之间有孔洞；鳃耙基部较粗壮；中部鳃丝上皮细胞表面的微嵴两侧有细小的横突，有些微嵴出现融合或间断；端部和基部鳃丝上皮细胞表面的微嵴消失，形成密集颗粒状突起；鳃小片的高度和片间距较大。

The invention comprises a free-form surface prism with three optical surfaces, and a micro-image display; the free-form surface prism is made of plastic glass materials with the refractive index greater than 1; the three free-form optical surfaces are concave surfaces, which meet one of the three surface-type equations, and the location relationship of each surface meets three condition equations; the incident angle formed between the widest-field upper edge rays emitted by an LCD and the second free-form surface meets the total reflection conditions; and an image source element is an LCD of 0.61 or 0.59 inches.

本发明包含一个具有三个光学表面的自由曲面棱镜和一个微型图像显示器，自由曲面棱镜采用折射率大于1的塑料玻璃材料，自由曲面棱镜的三个自由曲面光学表面均为凹形面，它们应满足三个面型方程之一，并且各表面的位置关系应满足三个条件方程，由LCD发出的最大视场上边缘光线在第二自由曲面上的入射角应满足全反射条件，像源元件为0.61或0.59英寸的LCD。

Ceilings should be ac-cessible for cleaning, and ideally, the surface should he coved where ceilings and walls meet In many food-production areas, the ceiling must have thermal in-sulation This may be necessary either to prevent surface condensation or to reduce the energy costs of maintaining low environmental temperaturesWalls should also be insulated, to prevent surface condensation They should be free from rising damp and be protected, where appropriate, from damage by forklift trucks, by use of a guard rail In modern factories, there is always a coved surface where walls meet the floor It is also usual for there to be a coved surface where walls join at right angles.

天花板应该交cessible清洗、最理想他表面复岩下天花板和墙壁应满足许多粮食产区，天花要有热的绝缘要么这可能需要防止或者减少表面凝结能源维护成本低，对环境温度也应绝缘墙壁、应防止表面凝结他们免于受到保护和潮湿上涨，酌情从叉车损坏，用现代铁工厂门卫、凡事总有复岩面墙那里迎接地板也是平日没有可能凡参加面复岩墙成直角。

A series of erosion-corrosion test has been done to J55 steel under the influence of current of gas-liquid phase by indoor self-made devices, and the corrosion mechanism of current of gas-liquid phase to oil pipe's inner surface has been got. The results show that oil pipe's inner surface will be corroded fleetly by liquid medium and corrosion products will form on it. But at the same time, the corrosion products or protective layer will be removed from the inner surface of steel pipes under the alternate impact of high speed gas and liquid flow, and on this bare steel surface corrosion film will form again and be removed again. Thus, by these ways the corrosion is exacerbated. Surface erosion-corrosion failure comes into being with the circulation of this process going on.

本文主要在气液两相流作用条件下，通过室内自制装置，对管材钢J55做了系列冲刷-腐蚀试验，结果表明，气液两相流对钢管内表面冲刷－腐蚀的机理是钢管内表面会受到液体介质的快速腐蚀，生成腐蚀产物，同时钢管金属表面不断被具有高流速的气液相交替地冲击，不断地从金属表面脱去保护膜或腐蚀产物，裸露的钢表面又会被介质快速腐蚀形成腐蚀膜后，再被两相流冲掉，如此反复，造成管内金属表面膜的连续破坏，使腐蚀加剧，最终导致钢铁表面的冲刷腐蚀失效。

The contact curved surface equations and the contact plane surface equations have been worked out. The boundary curve eqations of the contact surface have been founded.

运用数学分析方法，首次对板式楔横轧工艺的轧件稳定旋转条件、轧件不产生缩颈拉裂条件进行了理论研究。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。