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空中
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  air
     EXPLOSION WAVES IN AIR (Ⅰ) BASIC THEORY
     空中爆炸冲击波(Ⅰ)基本理论
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     The Calculation of Draught Place About Air Refueling Flexible Pipe
     空中加油软管拖曳位置计算
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     The Flight and Fire Control Synthesis Simulation Technology for Simulating air Attack
     用于空中攻击飞行模拟器的飞行与火控综合仿真技术
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     Data link communications in tactical air command and control systems
     在战术空中指挥和控制系统中的数据链通讯
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     Twisting Lifting in the Air of Large Type Tower Equipment
     大型塔类设备空中旋转法吊装
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  aerial
     Multiple Sensor Identifying Aerial Target Based on D-S Theory
     基于D-S理论的多传感器空中目标识别
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     Detection and recognition of aerial targets based on the Bubble wavelet function and GVF Snake model
     基于小波多尺度分析与GVF Snake的空中目标提取
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     Analysis of Freestyle Aerial World Cup Competitions in 2004—2005 Season
     2004—2005赛季自由式滑雪空中技巧世界杯赛情况分析
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     Unique Superiority and Countermeasure about Aerial Information Battle Weapons and Digitization Battlefield at 21th Century Warfare
     空中信息战兵器和数字化战场在21世纪战争中的独特优势及对抗措施
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     Study on Algorithm for Aerial Target Real-time Tracking and System Design
     空中目标实时跟踪算法研究及系统设计
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  “空中”译为未确定词的双语例句
     Community Aloft and Radar Observations of Seasonal Migration of Insects in Northern China
     华北地区空中昆虫群落及昆虫季节性迁移的雷达观测
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     Searching and Tracking Aerospace Targets Based on Array Antenna
     基于阵列天线的空中目标搜索与跟踪
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     A 3—YEAR(1962—1965)SURVEY OF ATMOSPHERIC POLLEN IN SHANGHAI AREA.
     上海地区1962—1965三年内空中花粉的初步观察
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     A 3—YEAR(1962—1965)SURVEY OF ATMOSPHERIC POLLEN IN SHANGHAI AREA
     上海地区1962—1965三年内空中花粉的初步观察
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     DECOUPLED UNIFIED FIELD EQUATIONS OF ARBITRARY SPIN IN KERR SPACETIME
     Kerr时空中任意自旋的统一场方程的退耦和分离变量
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  air
Thermal properties of polymers were investigated using dynamic thermogravimetric analysis in air.
      
The results demonstrated that both cyclomatrix phosphazene polymers 4 and 6 were of excellent thermal stability, and their char yields in air at 800°C were 45.1 and 43.2%, respectively.
      
Iodine species in the gas phase in real air samples has been determined in two field campaigns at the west coast of Ireland, indicating that gaseous iodo-hydrocarbons and elemental iodine are the precursors of new particle formation.
      
A seaweed-chamber experiment was performed, indicating that gaseous I2 is one of the important precursors that lead to new particle formation in the presence of solar light in the ambient air at the coastal tidal area.
      
Nearly monodisperse CdSe quantum dots (QDs) have been prepared by a soft solution approach using air-stable reagents in different organic solvents.
      
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  aerial
Numerous linear and nonlinear correlations between the contents of alkaloids and mineral elements in the aerial parts and roots of greater celandine (Chelidonium majusL.) were revealed by means of correlation and regression analyses.
      
Holocellulose isolated from the aerial parts of alfalfa (Medicago sativa) contains a polysaccharide complex of cellulose and hemicelluloses, the major structural components of cell walls.
      
A biotechnological approach is proposed for anaerobic conservation of aerial parts of woolly foxglove, followed by air-sun drying of the biologically transformed raw material.
      
Two peaks of abscisic acid content in the aerial plant organs accompanied by decreased content of the active cytokinin (zeatin) were observed at the beginning and at the end of heating.
      
A pectic polysaccharide named silenan, [α]D20 +148.6° (c 0.1; H2O), was isolated earlier from the aerial part of campion, Silene vulgaris (Moench) Garcke.
      
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The principal object of this paper is to present a direct method of finding the elevation of the exposuae station and conseqently the tilt and the swing, if desired, of an aerial photograph. Since the elevation of the exposure station is found, the plumb-line coordinate system can, in the sense of numerical calculation, be established however. The determination of the plumb-line coordinate system, relating to three ground control points and their cooresponding images on the photograph, means a determination...

The principal object of this paper is to present a direct method of finding the elevation of the exposuae station and conseqently the tilt and the swing, if desired, of an aerial photograph. Since the elevation of the exposure station is found, the plumb-line coordinate system can, in the sense of numerical calculation, be established however. The determination of the plumb-line coordinate system, relating to three ground control points and their cooresponding images on the photograph, means a determination of the position of the photograph in space. As can be seen the plumb-line coordinate system is definitely independent of the swing of an aerial photograph, the swing is not necessary in solving the space resection problem as the classical procedure done.The treetment in this problem involves only simple computations and produces exceptionally accurate results, as indecated in a numerical calculation during the preparation of this paper. Owing to the impossibility of publishing the numerical example in whole length, only the final results are referred here for comparing:

本文的目的,在於推導出一直接的算學方法,以求空中攝影的高度,進而求出其像片的倾角;如有必須時也求出像片的旋角來,但在本文的理論推導過程中,過去一般認為要先解决旋角的問題,而後才能解決空間定位問题的歷史看法,已經完全修正;旋角並不是解决空間定位問題所必須的。因為攝影高度既經决定,我們可以建立一垂綫坐標系,與像片在空間的轉動無關。每一像點在此垂綫坐標系上的關係完全可以藉攝影高度的得知而決定;此種關係的決定即相當於像片在攝影瞬間的空間位置的决定。這對於無論是像片的糾正、製圖、交會定點都是非常有幫助的。本文所論的方法,經數字計算的結果,表明精度是很高的,而計算手續也是簡便的。由於避免篇幅過長故未將全部計算例引出,只在此地列出一結果以相比較:

The object of this paper is offer an analytical method for solving the very important stereo-bridging problem in photogrammetry. In solving this problem we suppose that at the beginning and at the end of an arbitrary photo-strip there are three ground control points having their immages on the corresponding two pairs of photographs respectively. Based upon this condition we can utilize the stereo-resection method to carry out the aerial triangulation throughout the entire strip in order to get enough space intersection...

The object of this paper is offer an analytical method for solving the very important stereo-bridging problem in photogrammetry. In solving this problem we suppose that at the beginning and at the end of an arbitrary photo-strip there are three ground control points having their immages on the corresponding two pairs of photographs respectively. Based upon this condition we can utilize the stereo-resection method to carry out the aerial triangulation throughout the entire strip in order to get enough space intersection points for each intermediate photograph possibly to be mapped by virtue of some simple instruments.This paper is the extension of a previous article entitled "Photogrammetric Space Resection", published in the Chinese Journal of Civil Engineering, Vol. 1, No. 4, Dec., 1954. At present, as the writer has not get gone so far into numerical computation, how would this method be workable is subject to test in the near future. The prospect of not only furthering the theoretical foundation of photogrammetry but also opening a new approach to the photomapping problem is highly encouraging.

本文的目的,在於提供一种算学解析的方法,从理論上去解决在一条相当長的航帶上只在兩端各有三个地面控制点的情况下,展开空中三角測量,以达到每張像片都有足够的控制点,以便独立或分区制圖的問題,解决本問題的重点是:(1)根据一条航带兩端的三控制点确定該航线首尾兩端各兩張像片的外方位元素。(2)由于在一条航带上的各像片彼此都有60—80%的左右重叠,在第一、第二及第三像片的重叠区域可选出七个点来利用已經定位了的第一、第二兩像片,以空間交会的办法計算出該七点的地面坐标。(3)在該七点中适当选擇6个点的地面坐标及其在第三像片上的像点坐标(根据第三像片的几何軸量得的),确定第三像片的外方位元素。(4)利用第二、第三及第四像片,在其重叠的区域内选擇七个点,按照确定第三像片外方位元素的办法,确定第四像片的外方位元素,如是类推至最后一張像片为止。(5)由于航帶兩端各有三控制点,上面的推算各像片的外方元素的过程实际上是从兩端开始向中央推进,其最中間的一張像片的外方位元素及其中央的交会控制点的坐标,因有各种誤差参入的关系,由兩端推来,当会得到兩組不同的数值,取其中数作为第一次近似值,將其坐标誤差一边一半向兩端按距离分配,作...

本文的目的,在於提供一种算学解析的方法,从理論上去解决在一条相当長的航帶上只在兩端各有三个地面控制点的情况下,展开空中三角測量,以达到每張像片都有足够的控制点,以便独立或分区制圖的問題,解决本問題的重点是:(1)根据一条航带兩端的三控制点确定該航线首尾兩端各兩張像片的外方位元素。(2)由于在一条航带上的各像片彼此都有60—80%的左右重叠,在第一、第二及第三像片的重叠区域可选出七个点来利用已經定位了的第一、第二兩像片,以空間交会的办法計算出該七点的地面坐标。(3)在該七点中适当选擇6个点的地面坐标及其在第三像片上的像点坐标(根据第三像片的几何軸量得的),确定第三像片的外方位元素。(4)利用第二、第三及第四像片,在其重叠的区域内选擇七个点,按照确定第三像片外方位元素的办法,确定第四像片的外方位元素,如是类推至最后一張像片为止。(5)由于航帶兩端各有三控制点,上面的推算各像片的外方元素的过程实际上是从兩端开始向中央推进,其最中間的一張像片的外方位元素及其中央的交会控制点的坐标,因有各种誤差参入的关系,由兩端推来,当会得到兩組不同的数值,取其中数作为第一次近似值,將其坐标誤差一边一半向兩端按距离分配,作为控制点的概略平差。(6)利用概略的像片外方位元素,將各像?

Results of planting large amount of slightly but evidently diseased tubers undernatural field conditions obtained by inoculation during the harvesting time of theprevious year indicate that successive underground secondary infections from plantto plant of the same hill constitute the main feature of the process of formation ofprimary foci of subsequent aerial spread of the late blight in a potato plantation Inspection at the time of emergence revealed that all the sprouts found at theperiphery of and directly...

Results of planting large amount of slightly but evidently diseased tubers undernatural field conditions obtained by inoculation during the harvesting time of theprevious year indicate that successive underground secondary infections from plantto plant of the same hill constitute the main feature of the process of formation ofprimary foci of subsequent aerial spread of the late blight in a potato plantation Inspection at the time of emergence revealed that all the sprouts found at theperiphery of and directly connected with the tuber lesions were blackened and diedunderground.Among the sprouts which were about to emerge,those standing closeto the dead sprouts were also discolored at their basal portion,while those furtherapart still entirely healthy.Dark brown extended lesions can sometimes be seen onthe stems of the weak potato seedlings,but sporangial covering was present onlyon their lower underground portions.The stem lesions did not always reach theextremity of the stem base.Even if they did,they might not be directly connectedwith the tuber lesions. Among a total of 789 hills planted with disesed tubers in Peking and Salintzein 1956,only 9 plants with stem lesions were found,of which 5 wilted and diedrapidly,1 with its lesion healed up.The remainder stayed long enough for thefungus to sporulate on their above-ground portion of the lesions and cause thefoliage infection of the same plant and adjacent plants at the onset of a favorable weather. It is believed that the significance of the weak diseased seedlings with basalstem lesions appeared early in the season consists chiefly in the capacity of givingrise to sporangia which may again infect the underground portion of the stem of ahither to healthy plant.On the stem of a larger plant,the fungous mycelium canonly exist in the cortical tissue spreading upward and downward from the infectioncourt to cause a dark brown stripe of irregular width.Stripe lesions of this typeapparently do nto impair the normal development of the plant,but their above-ground portions serve as a persistent potential source of aerial infection. Observations outlined above together with the results of an experiment ofseedling top inoculations under field conditions lead us to postutate that delayedaerial infection is due on the one hand to the fragility of the diseased seedlingsunder natural field conditions and on the other to the lack of a suitable combinationof moisture and temperature required for sporulation and infection as the springweather is characterized by very low night temperature. It is anticipated that local forcasting service may find it helpful to plant diseasedtubers in a proper field plot for the observation on the development.of the foci ofpotato late blight.

在河北省沙岭子农业試驗站和北京农業大学試驗农場1955和1956两年所进行的病薯栽培試驗,表示土中的重复侵染是中心病株形成过程的基本特征。当挖掘出土初期的病薯时,發現直接与种薯病斑相連的幼芽都在出土之前变黑死去,剛剛露土的幼芽中,靠近已死幼芽的莖基也开始部分变色,距离較远的则仍然健全。在已出土的衰弱幼苗上常常可以看到露在地面的莖基部分也显出暗褐色的病斑,但是沒有孢子囊,而該病斑的地下部分则披有一層孢子囊趺缜o斑并不全是达到莖基的終点,而达到莖基終点的,也不与种薯病斑相連接。1956年在两地播种的789穴病薯中發現了9株这种病苗,其中5株迅速萎蔫而枯死,1株發生莖斑痊愈現象。只有少数出現較晚而維持較长久的弱苗遇到适合气候时能够在地面上形成孢子囊傳染到本株或同穴中其他植株的叶片缙诓∶绲闹饕饔孟匀辉谟谛纬傻叵骆咦幽乙砸鹜ㄖ姓诔沙さ慕≈昵o基的感染。在成株莖部上病菌只能在皮层扩展引致条紋状的暗褐色病斑。这种病斑不严重影响植株的生长發育,但是在露出地面后随时可以形成孢子囊成为空中傳染的經常潜在来源。出土病苗的观察以及幼苗地上部接种試驗結果說明病害延迟流行的原因,一方面是受病的幼苗容易枯死,另一方...

在河北省沙岭子农业試驗站和北京农業大学試驗农場1955和1956两年所进行的病薯栽培試驗,表示土中的重复侵染是中心病株形成过程的基本特征。当挖掘出土初期的病薯时,發現直接与种薯病斑相連的幼芽都在出土之前变黑死去,剛剛露土的幼芽中,靠近已死幼芽的莖基也开始部分变色,距离較远的则仍然健全。在已出土的衰弱幼苗上常常可以看到露在地面的莖基部分也显出暗褐色的病斑,但是沒有孢子囊,而該病斑的地下部分则披有一層孢子囊趺缜o斑并不全是达到莖基的終点,而达到莖基終点的,也不与种薯病斑相連接。1956年在两地播种的789穴病薯中發現了9株这种病苗,其中5株迅速萎蔫而枯死,1株發生莖斑痊愈現象。只有少数出現較晚而維持較长久的弱苗遇到适合气候时能够在地面上形成孢子囊傳染到本株或同穴中其他植株的叶片缙诓∶绲闹饕饔孟匀辉谟谛纬傻叵骆咦幽乙砸鹜ㄖ姓诔沙さ慕≈昵o基的感染。在成株莖部上病菌只能在皮层扩展引致条紋状的暗褐色病斑。这种病斑不严重影响植株的生长發育,但是在露出地面后随时可以形成孢子囊成为空中傳染的經常潜在来源。出土病苗的观察以及幼苗地上部接种試驗結果說明病害延迟流行的原因,一方面是受病的幼苗容易枯死,另一方面是在早期气候下不能得到形成孢子和再侵染所需要的温湿度的配合。建議在各地預测站选擇适当地点播种病薯,以便观察病害中心的發展情况,作为預測預报的根据。

 
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