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Based on the working condition of the tractor, a new type of electric tractor drive system which combines a motor and a gear, and the evaluation index and the calculation method for dynamic performance of electric tractor are suggested; taking an electric tractor drive system as design object, the balance graph of drive-resistance force, climbable gradient under different shifts, and continuous working time are calculation analyzed.

根据电动拖拉机作业特点,提出了一种电动机和变速箱相结合的电动拖拉机传动系统结构方案,并给出了电动拖拉机动力性能和经济性能评价指标以及电驱动系统主要参数的设计计算方法,以基于串励直流电动机的某型号小四轮电动拖拉机电驱动系统为设计实例,计算分析了该电动拖拉机的驱动力-行驶阻力平衡图、不同挡位下的爬坡度以及连续作业时间。

Applying the cadastral maps drawed during the Japanese colonial period in the current land survey correction could be distracting due to inconsistent of coordinate systems. Accuracy of land survey correction results seems to be somehow controvertible for general land owners. In the reservation of cadastral maps, maps usually could not be jointed with whole areas but only reluctantly jointed partially.

日据时代所绘制之地籍图运用於现今土地复丈作业往往因坐标系统之不一致,造成作业上极大的困扰,土地复丈成果之精确度在於一般土地所有权人的观感中,似乎存在一定的质疑,在地籍图保存方面,因图纸伸缩及人为因素,经常无法使全区接合仅能勉强局部接合。

The union flows, non- flows the correlation table, afterdetermined the work unit synthesized the reciprocity as well as thework unit synthesizes the arrangement table, draws up the positioncorrelation chart and the area related chart.

结合物流、非物流相关表,在确定出了作业单位综合相互关系以及作业单位综合排序表后,绘制出位置相关图和面积相关图。

the digitized mapping technique is to combine the field data collection system with the computer assisted mapping system in surveys by computer technology.it aims to realize the information collected and processed digitally and automaticaity.the digitized mapping technique can cut short the working time,lighten the labor intensity and enhance the precision of the productions.the system consists of three parts,such as data input,data processing and data output.the survey-record digitized mapping technique is widely used in the digitized mapping working pattern.for its superiority over traditional plane-table mapping in accuracy and efficiency,the large scale digital mapping is becoming more and more popular.compared with traditional analogue mapping,digital mapping has more quality control pivotai points,and its contents and methods are more complex.with the appearance of new technology gps ,the coordinate of different levels controlling points may be surveyed in high precision and it has been applied widely in topographic survey.the operation process of gps electronic tachometer is introduced and its application in topographic survey is br

计算机应用论文,计算机论文, rtk ,全站仪,数字测图,地形测量, gps论文摘要:数字测图是在测量工作中利用电子计算机技术将野外数据采集系统与内业机助制图系统相结合,其目标是实现信息采集处理的数字化、自动化、信息化。数字测图可以缩短作业时间,减轻劳动强度,提高成果精度。数字测图系统主要由数据输入、数据处理和数据输出3部分组成,数字测图作业模式中测记式数字测图应用最为广泛。大比例尺数字测图正以其测图精度高,成图速度快等优势逐步的取代传统的,以平板仪为主的模拟测图。与传统的模拟测图相比,数字测图的质量控制关键点更多、内容与方法更为复杂。gps 新技术的出现,可以高精度并快速地测定各级控制点的坐标,在地形测量中已得到广泛地应用。本文介绍了gps 配合全站仪的作业流程,简要阐明了其在地形测量中的应用。在利用实测数据成图的过程中,解决一些常见的问题,并给出解决的办法及依据,同时给出一些有益的结论,以适应实际使用的需要。

The dissertation elaborates various links operating methods and the work flows in five domains such as foundation control, analytical aero triangulation ,aerial photogrammetry mapping, DEM, DOM and so on, The results of this project has been checked out by theologize and satisfied precision required, therefore the scientific research might be generalized.

论文从基础控制﹑空三加密﹑航测成图﹑数字地面模型﹑正射影像等五个方面阐述各环节的作业方法和作业流程,整体工程结束后,经野外实地全站仪检测比较,符合成图的精度要求。

To improve the quality and efficiency of the logistics of G factory, to standardize scene management and to guarantee the delivery date, this paper first draws the value-flow chart of vulcanizer beams and analyses the long command, handling, inventory and waste problems of the production planning, delivery and automatic welding with Lean thinking. It then draws the value-flow future chart according to the value-flow diagram, the scene observation and survey data.

对于生产物流的质量和效率、规范现场管理、保证交货期、应用价值流图技术的改善,可根据现场观测和调查的数据,先绘制铆焊车间横梁作业价值流现状图,并从精益思想出发,对生产计划、送货和自动焊中存在的多头指挥、搬运、库存浪费等问题逐一分析,然后绘制价值流未来图。

The results indicated:1 Some cognitive performances decreased obviously with age,such as symbol-digit, visual digit span, auditory digit span,pairedassociation learning,free recall of picture and recognition of meaningless figure But other cognitive performances did not decrease with age, such as picture classific...

结果表明:(1)一些作业(符号数字、视觉数字广度、听觉数字广度、词对联想学习、图象自由回忆和无意图形再认)成绩随年老明显下降,另一些作业(图象分类、卡片分类、心算和矩阵填图)成绩不随年老明显降低;(2)再次验证心算、符号数字、数字鉴别和计数四项非词语性作业速度随年老进行性减慢。

The working characteristics, feasibility, mapping precision, air photograph scheme and indoor and field concrete working method are discussed for applying digital aerial survey tech mapping1:500 cadastres.

对应用数字航测技术测绘1∶00地籍图的作业特点、行性、图精度、空摄影方案及内外业具体作业方法进行了探讨。

Geography homework design should also the body living this principle now, this text front place homework and postposed homework design to do study:Front place homework proper and plain, have a direction type, personal with group cooperation combine together, have to open sex;The classroom homework want to with meticulous care choose while and then placing homework design, innovation design fill diagram homework and expand extension homework outside the lesson, homework outside the lesson also should recreation.

地理作业设计也应体现生本理念,本文就前置作业和后置作业设计做了探讨:前置作业宜浅显、具有导向型、个人与小组合作相结合、具有开放性;而后置作业设计时课堂作业要精心选题、创新设计填图作业、拓展延伸课外作业、课外作业也应休闲。

Geography homework design should also the body living this principle now, this text front place homework and postposed homework design to do study:Front place homework proper and plain, have a direction type, personal with group cooperation combine together, have to open sex;The classroom homework want to with meticulous care choose while and then placing homework design, innovation design fill diagram homework and expand extension homework outside the lesson, homework outside the lesson also should recreation.

郭思乐教授提出的&一切为了学生,高度尊重学生,全面依靠学生&的生本理念,注重培养学生学习的主动性和自主性。地理作业设计也应体现生本理念,本文就前置作业和后置作业设计做了探讨:前置作业宜浅显、具有导向型、个人与小组合作相结合、具有开放性;而后置作业设计时课堂作业要精心选题、创新设计填图作业、拓展延伸课外作业、课外作业也应休闲。

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推荐网络例句

On closer examination, though, this is not a vote for multilateralism but just the opposite.

仔细审视后我们发现,这并非是对多边主义投出的赞成票,而是恰好相反。

Uncovering their weak spots, so I can defeat them.

揭露出他们的弱点,这样我就可以打败他们了。

Methyl bromides, in C_(3v) symmetry, have been extensively studied at their first absorption A-band because the behavior of these molecules can be used as a prototype for depicting numerous types of photodissociations in a variety of polyatomic molecules.

例如,有很多研究报道了C_(3v)对称的溴甲烷等分子在第一吸收带的光解,这是因为其光解行为可以作为理解其它多原子分光解的原型。