距

Taking the minimization of the tooth crown of a worm wheel and the maximization of transmission efficiency and the distance from the center as objectives,we establish the mathematical model for the multi-objective optimal design of worm transmission on the condition that the worm wheel and the worm transmission meet the requirements for load,strength and others.

以蜗轮齿冠体积最小、传动效率最高和中心距最小为目标，在保证蜗轮和蜗杆满足承载、强度及其它要求的前提下建立蜗杆传动多目标优化设计的数学模型。

From 4 000 to 1 200 a BP the vegetation of the upper mountain zones (between 1 300 ～ 1 600 m) of the Daiyun Mountain Range was a subtropical mixed conifer-hardwood forest dominated by Cryptomeria, Castanopsis, Quercus, and Tsuga.

在距今4 000～1 200年前期间，戴云山脉上部(海拔1 300～1 600 m)的植被为亚热带针阔叶混交类型，优势种属包括Cryptomeria、Castanopsis、Quercus和Tsuga等。

The problem, which studies techniques of density tool design and measure, deals with logging point, shielding material, detector crystal, spacing and detecting depth, tally energy window.

研究密度仪器设计和测量技术中涉及到的记录点、源距、探测深度、屏蔽材料、探测器晶体和能窗选择等相关问题。

In-vivo neutron and gamma spectra of depleted uranium sphere and vanadium sphere under central D-T neutron source were measured,with a 18 mm×20 mm stilbene crystal detector, at 7,10,13,16,19,22 cm away to the center in 45° direction in depleted-uranium sphrer, and 1.8,4.8,8.3 cm away to the center in the 0° direction in V sphere.

为获得介质内中子能谱及伴生γ能谱的实验数据，在中心D-T中子照射下，用18 mm×20 mm的茋闪烁体探测器，测量了与D+束成45°角的水平方向距球心7、10、13、16、19、22 cm位置处贫化铀球介质内的中子能谱和伴生γ能谱，以及钒球内与D+束成 0°角、距离球心1.8、4.8和8.3 cm处的中子能谱和伴生γ能谱。

It includes: the selection of detector crystal, the design of geometrical dimension of the detector, the magnetic shield of detector, shield of fast neutron and thermal neutron, distribution of fast neutron in formation, the investigation depth of logging tools and the spacing.

本文第三章介绍了对双晶C/O能谱测井仪研制过程中遇到的主要物理问题进行研究的情况，内容包括：探测器晶体选择、探测器几何尺寸设计、探测器磁屏蔽研究、快中子屏蔽、热中子屏蔽、快中子地层分布、仪器探测深度及源距等。

Beijing lanting youth hostel is newly open , its geographical position close neighbor ancient capital axle wire, is located north three ring An Zhenqiao south side, with convenient transprotation, garceful environment , for is apart from the national stadium bird nest and the water cuber .

北京蓝亭客栈是新开张的一家青年旅舍，其地理位置紧邻古都中轴线，位于北三环安贞桥西南侧，交通便利，环境优雅，为距国家体育场鸟巢、水立方最近的青年旅舍。

A new algorithm for offset to cubic B-spline curve is proposed.

提出了一种三次B样条曲线等距线生成的算法。

Specifically, this essay argues that we can obtain some wider, more rational and diversified perspectives when we scrutinize it from the cultural lag theory.

但笔者以为，作为文化形态之一的城市化如果能够被置放在文化变迁的动态性中来研究，尤其是以文化堕距的理论来把握和审视，必然会获得一些更加宽泛、更加理性、也更加多元化的理解视角。

This article explains the phenomenon once again from the perspective of the "cultural lag" theory about the village of Yangcheng that is writhed by Li Peilin. The article has explained the village's high-speed changes of economic structure, the rapid changes of cultural structure, the slow changes of the power structure, the mark time changes of the social relations and the impact of such changes.

本文从"文化堕距"理论的视角对李培林笔下的羊城村做再一次解读，解释城中村经济结构变迁的高速，文化变迁的快速，权力结构变迁的慢速，社会关系变迁的原地踏步及这种变迁产生的影响。

The absolut measure metheod was used as the basic principle of device building and software design of the ultraprecision gears total cumulative pitch error measurement system.

同时，遵循测量原理并采用高精度的元器件搭建了绝对测量法检测超精密齿轮齿距偏差的测量平台。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。