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effort
相关语句
  努力
     To Strengthen the managing function of the Association, to make effort to serve the industry, to develop the coating industry of China.
     加强行业管理职能,努力为行业服务,发展我国涂料工业生产─—1994年涂料行业工作回顾和1995年的工作安排
短句来源
     Great Effort to Increase Technical and Manufacturing Level of Coal Mining Machinery Equipment in China
     努力提高我国采煤机械装备的技术和制造水平
短句来源
     China Railway Container Transport Making Effort to Connect with international Popular Intermodel
     努力与国际通行模式接轨的中国铁路集装箱运输
短句来源
     To pay every effort to improve the quality of coatings products
     努力提高涂料产品质量
短句来源
     How caused the Chinese manufacturing industry to transform“ design in china” from“ made in china” to become the goal which the Chinese design and the entire manufacturing industry joint effort.
     如何使中国制造业从“made in china”转变成“design in china”就成为了中国设计界和整个制造业共同努力的目标。
短句来源
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  作用力
     Its structure possesses two-staged force enhancement of screw and hydraulic pressure,just the hand moving method can reach an effort of 1 000 kN~2 000 kN.
     该结构具有螺旋和液压两级增力,用手动的方法就可以达到1 000 kN~2 000 kN的作用力
短句来源
     S1 is head and S2 is rod-shape part, intermolecular effort can bind each other.
     S1形成球状部分,S2形成棒状部分,两者之间通过分子间的作用力相互结合。
短句来源
     (2) the action range and effort of root system is limited;
     (2)植被根系作用力及作用范围有限;
短句来源
     obtained formulae of mutual effort between the tube - plate and tubes and bending moment and rotating angle;
     导出了管板与管子相互作用力的计算式以及管板的弯矩与转角公式;
短句来源
     In this paper, based on the demonstration and comparison of two series of specific efforts, the specific effort per gravitational force N·kN-1 is suggested to be precedently used as the standard.
     通过论证与比较两种单位力系列,并优先推荐采用单位重力的作用力N·kN-1为基准。
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  “effort”译为未确定词的双语例句
     Effort be Made in the Basic Theoretical Study and Experimental Work of Buoys
     进一步加强浮标的基础理论研究和实验工作
短句来源
     Pumping principle of concrete and calculation of pumping effort
     混凝土的泵送原理及泵送力计算
短句来源
     Effort Devoted to the Sino-Japanese Medical Exchanges──Note on the Visit of Kousyokai's Akio to China
     Effort Devoted to the Sino-Japanese Medical Exchanges──Note on the Visit of Kousyokai's Akio to China
短句来源
     THE INSULATION EFFORT OF HEAVY OIL TANK ROOF
     重油罐罐顶保温的尝试
短句来源
     Development Effort of Models of Chinese Helicopter from 1985 to 1995
     抓时机,创佳绩,奋力拼搏——中国直升机型号研制的10年(1985~1995)
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  effort
Effort is devoted to give some sufficient conditions for which the equation has at least two positive solutions.
      
This paper summarizes our recent effort to access structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization.
      
In an effort to solve this problem, an inner basic model of an intelligent agent (IA) is presented.
      
Since the 1960s, enormous effort has been devoted to reduce the working macroscopic field (voltage).
      
While much effort has been devoted to networks with the small-world and scale-free topology, structurally they are often assumed to have a single, densely connected component.
      
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As in general in all time service works, the problem is to obtain and keep an accurate time, to determine the corrections of standard clock and to transmit time signals. This present report is concerned only with the last two items. At Zi-Ka-Wei Observatory, radio method was introduced into time service in 1914. Some rigorous changes occured in 1926, a number of instruments were installed. Many of them are still in use. In 1940, the observatory began to transmit rhythmic signals twice a day. From then on until...

As in general in all time service works, the problem is to obtain and keep an accurate time, to determine the corrections of standard clock and to transmit time signals. This present report is concerned only with the last two items. At Zi-Ka-Wei Observatory, radio method was introduced into time service in 1914. Some rigorous changes occured in 1926, a number of instruments were installed. Many of them are still in use. In 1940, the observatory began to transmit rhythmic signals twice a day. From then on until December 1950, no further developments were made. The main instruments we had in 1950 were: a 80mm Prin transit with impersonal micrometer, two Leroy pendulums as standard clocks, three astronomical clocks and their slaves, equipments for receiving and recording time signals, etc. Since 1952, we began to make some improvements, especially on rhythmic signals. First, we converted a common clock into a "transmitting clock" to obtain 61 impulses in every minute and second by making use of photoelectric arrangement (Fig. 1), we succeeded to raise the accuracy of our signals. To improve signal accuracy further, we have to deal with various sources of errors which are conditioned by our equipments. The most important among these are: 1. error in prediction of corrections of the standard clocks, 2. error in the adjustment of the transmitting clock and 3. time lag in transmission. In consequence of last three-year's research, these errors are reasonably reduced. The first two are now±0~s.007 and ±0~s.005 respectively and the last is small. Accordingly, the deviation of time signals XSG has been supposed to be±0~s.01. However, this is not enough for the requirement. The more efforts are being made to bring further improvements. But as the requirements for signal accuracy is far above what the present installation can offer, some new equipments are ordered and they will joint in force with the old ones in the nearest future. Since February 1954, Zi-Ka-Wei Observatory has cooperated with the time service departments in Soviet Union. This has been helpful to our works in every way.

授時包括测時、守時和播時三个主要方面。在時號的发播中包含了预報主钟改正量的差误,工作钟的調節誤差和電路遲滯变化等三种誤差。如果使用石英钟及有關设备,这就可基本解决。各台站在其天文观测基础上订定的時號改正數也包含有偶然差和系统差,比較全面解決的只有蘇聯和国際時間局这两个标准系统。徐家匯觀象台授時工作歷史很久,作了一些工作,但抗戰以來,郎停滯不前,直到人民政府接办,才逐步在原有基礎上開展了改進。幾年来主要是改裝了一具工作钟,裝置光電设备以发播科学式時號,對時号精确度解决了秒距誤差和五分间誤差。工作钟的调节誤差被其本身品質所限,仍未解决,只是在加強值班工作之后,有了一定限度的提高,目前約為±0~s.005,在预报主钟改正量時,也有很大程度的不稳定,約為±0~s.007。所以時号的精确度在±0~s.01左右。要进一步提高质量,满足要求,有待於新設備的增添使用。在時号改正數方面,所存在的相當大的系统差,可採用蘇聯或国際時間局系統的改正數來避免。

In the previous paper, we reported the formation of bis(O,O-diethyldithiophosphate) disulfide as an intermmediate product in the course of chlorination of O,O-diethyldithiophos phoric acid. During the past decade, much effort has been directed towards the synthesis of mixed phosphoric esters and esters of phosphoric anhydrides, some of them being found as powerful insecticides. The disulfide with the general, known as "phos phatogen," has not been closely investigated, and apart from isolated cxamples,...

In the previous paper, we reported the formation of bis(O,O-diethyldithiophosphate) disulfide as an intermmediate product in the course of chlorination of O,O-diethyldithiophos phoric acid. During the past decade, much effort has been directed towards the synthesis of mixed phosphoric esters and esters of phosphoric anhydrides, some of them being found as powerful insecticides. The disulfide with the general, known as "phos phatogen," has not been closely investigated, and apart from isolated cxamples, little about this class of compounds has been recorded in the li'erature. Considering their possible insecticidal and fungicidal activities, we prepared a series of the disulfides, aliphatic as well as aromaic, and examined some of their chemical properties.In connection with the investigation stated above, we needed various O,O-dialkyldithiophos phoric acids as intermmediates. The reaction bstween monohydroxy alcohols, polyhydroxy alcohols and different types of phenols with phosphorus pentasulfide were studied. Methyl, ethyl, i-propyl, n-butyl, i-butyl, i-amyl i-amyl and cyclohexyl alcohols reaced with phosphorus pentasulfide smoothly to give O,O-dialkyldithiophosphoric acids in 80-90% yield. The reaction product of polyhydroxy alcohols, namely, ethylene glycol, trimethylene glycol, or glycorol with phosphorus pentasulfide was not homogeneous; we failed to isolate from it the expected product. Although pbenol and β-naphthol reacted with phosphorus pentasulfide equally smoothly, no expected dithiophosphoric acids were obtained from chlorophenols and nitrophenols.Pure sodium salts of the O,O-dialkyldithiophosphoric acids were oxidized by calculated amount of bromine in cold aqueous solution to give the disulfides in 58-85% yield. Eight different disulfides, were propared, where R represents methyl, ethyl, i-propyl, n-butyl, i-butyl, n-amyl, i-amyl, cyclohexyl or phenyl radical. Among these substances only the last one decomposed spontaneously in anhyhrous state within a few days, while the other members were quite stable and unchanged after four months.The disulfides exhibited typical radical or polar cleavage reactions of the unit, since they dissolved in cold aqueous sodium sulfide to form sodium salts of the ditbiophosphoric acid with separation of free sulfur. In alcoholic silver nitrate, they separeted in the form of silver salts of the corresponding dithiophosphoric acids according to the following equation:With alcoholic mercuric chloride, the formation of a double salt instead of the cleavage of -S-S-bond was observed. A series of the double salts with the general formula were prepared, where R represents methyl, ethyl, i-propyi, n-butyl, i-butyl, i-amyl, cyclohexyl or phenyl radical.

本實驗研究了各類醇及酚与五硫化二磷的作用,各種一元醇,苯酚与β-萘酚与五硫化二磷生成相當的二硫代磷酸O,O-二烴基酯,但多元醇,氯代苯酚,硝基苯酚与五硫化二磷作用後,均未得預期的產物。本實驗合成了八種二硫代磷酸O,O-二烴基酯的汞鹽,九種雙(硫代磷酸O,O-二烴基酯)二硫物及八種二硫物的氯化汞複鹽。二硫物是一類比較活潑的化合物,其-S-S-鍵易被離子化藥劑所離解,同時呈一定的氧化性能。二硫物有失去一個硫原子的傾向,硫原子成為游離狀態析出或与金属成硫化物。

In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided...

In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided into the following headings: Ship hydrodynamics:(1)Systematic model testing.(2)Model-ship co-relalion, (3)Theory of wave making resistance,(4) Systematic testing of model propellers, (5)Propeller theory,(6)Cavitation,erosion,Singing of propellers,(7)Ship motion and seakeeping quality. Strength of ships: (1) Strength testing of actual ships and stress measure- ments on sea way,(2)Strength testing in model tank,(3)Problem of long superstructure,(4) Elastic and plastic strength of ship plating,(5) Ship vibration, (6) Materials for ship construction. This paper also gives an account of the preliminary achievments of the Chinese shipbuilding research work in respective fields and expresses the opinion that a great deal of amount of work is left to be done for the Chinese naval architects.Finally,the paper suggests that China must redouble her effort to construct her main shipbuilding research base equiped with instruments and apparatus of highest quality and to train the research experts as quick as possible.

为了在十二年内争取赶上世界的造船科学水平,就有必要对世界各国造船科学研究的发展,进行一番探讨。本文首先说明造船科学在百年来所起的作用,和二次世界大战后各国对造船科学研究的组织和发展。进一步探讨了二次大战后在船舶流体力学及船体强度学两方面的主要成就。并分以下几部份叙述: 船舶流体力学方面:(1)关于船型的系列试验;(2)关于船模与实船的换算关系;(3)兴波阻力理论;(4)推进器系列试验;(5)推进器理论;(6)推进器空泡、剥蚀、唱音等问题;(7)船舶运动和适航性。船体强度学方面:(1)实船强度试验和航行中应力测量;(2)船模试验池中的强度试验;(3)长上层建筑问题;(4)船体钢板的弹性塑性问题;(5)船体振动问题;(6)造船用材料问题。文中也涉及一些我国造船科学研究的初步收获,并说明我国在整个造船科学领域中还留着很大空白面。为了进一步发展我国的造船科学研究;建设主要的研究基地,充实仪表设备和培养研究人员是刻不容缓的事。

 
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