测量误差

Increasing observation accuracyand reducing the error of the measuring ship will improve the accuracy of orbit determination during Translunar orbit phase,and the reduced dynamic method and improvement of lunar gravity accuracy will benefit the accuracy of orbit determination during Misson Orbit phase.

在奔月阶段，提高观测量精度和减小测量船的点位误差将有助于提高定轨精度，而在环月阶段，采用减缩动力学方法和提高月球重力场精度将有助于提高定轨精度。

It is found that the third order method is the best when abridging reflectance from 5 nm to 10 nm, 20 nm or 30 nm intervals, while the direct selection method is the best when abridging reflectance from 10 nm to 20 nm or 30 nm.

从仿真的结果可以看出：若将测量间隔为5 nm的数据压缩成间隔为10 nm、20 nm或30 nm的数据，则采用三阶删节方法误差最小；若将测量间隔为10 nm的数据压缩成间隔为20 nm或30 nm的数据，则直接选取法似乎结果更好一些。

By rotating the X-axis of the measurement coordinates, the straightness data of each generatrix are transformed into a unified 3D coordinate system whose Z-axis superposes the least square mean axis calculated with the data of the multiple generatrices. The computer simulations and experiments prove that the construction by rotating the abscissas can effectively eliminate the distortion of the constructed profile.

通过测量坐标系中X轴的旋转，将各条母线直线度偏差数据统一到同一个空间坐标系中，采用两端面圆的最小二乘轴心的连线作为零件轴线，消除了直接构造所带来的表面变形，并能进一步计算出被测内孔的直径、圆度和轴线直线度误差，使测量系统集成化和多功能化。

Based on the optoelectronic inspecting technology, the chinks between knife edge and the generatrices of measured part were measured by the laser scanned inspecting system and using the rotating and axial feed servo systems, and the non contact automatic measurement of straightness error was realized.

基于光电检测技术，利用回转和轴向进给伺服系统，通过激光扫描检测系统测量刀口尺与被测零件素线之间的间隙，实现了对直线度误差的非接触自动测量。

A series of different postures are measured,then the platform's actual mechanism parameters are ...

针对测量随机误差对测量计算结果的影响，提出了改进措施。

Taking the horizontal control survey of Qinling Tunnel as an example and on the premise of the survey design,the paper presents in detail the technical points and arrangement methods of the horizontal control survey inside long cut-through tunnels and the concrete requirements and items to which attention should be paid during the survey.

0前言隧道贯通误差在铁路测量规范中有着明确的限差规定，它是衡量隧道正确施工和控制测量精度的重要指标。

Therefore the author built a 3-D model based on the surface equations of roller gear cam, and presented a method of using coordinate measuring machine to measure the surfaces of the cam.

为此，本文以弧面分度凸轮的轮廓面方程为基础，建立了弧面分度凸轮的三维模型，提出了一种用三坐标测量机测量其轮廓面误差的方法。

Thermal conductivity A of mass and single pellet is successively measured by an efficient and steady heating system, of which the heat source is infrared ray. The milli-volt instrument and thermocouple is a way to measure temperature and its of higher precision and has fewer errors. Thermal diffusivity a is researched based on the study of C and. In this thesis, the volume convective heat-transfer coefficient, is measured on the thin-bed drying plat in terms of the principle of cooling machine and the Boyce drying theory, focusing on the air velocity v or mass flux G affecting on h.

导热系数λ的测定采用红外线纵向热流法，热源稳定、效率高；温度采用毫伏表加热偶温度传感器测量，精度高，误差小，并对成堆物料和单个颗粒均作了研究；基于C和λ的测量结果，导温系数α采用公式法计算而得；对流换热系数h_y为体积对流换热系数，其测定是模拟颗粒饲料的冷却干燥过程，依照冷却器的工作原理，构建颗粒薄层干燥试验台，并在Boyce干燥理论的指导下，重点测试了冷却风速对对流换热系数的影响。

To solve the problem of inline measuring hobs with bigger modulus in practice production,an inline measuring system for the circular pitch error of hobs is introduced.

为了解决实际生产中大模数滚刀的在线测量，提出一种滚刀容屑槽周节误差测量系统。

Points are given precise trigonometric leveling instrument to replace second-class standard of measurement of geometric conditions, the method reduced errors, and improve the accuracy of the advantages and disadvantages of the measures.

给出了站仪精密三角高程测量替代二等几何水准测量的条件、减弱误差的方法、优缺点及提高精度的措施等。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。