壁發射 的英文怎麼說
中文拼音 [bìfāshè]
壁發射
英文
wall emission-
We have observed the following characteristics of anatomical structure and development : ( 1 ) the primary roots belong to archetype and the lateral roots occur in the position toward the xylem of the vascular cylinder ; ( 2 ) the root endodermis consists of thicken casparian strips, and there are from two lo four layers parenchyma cells near the pericycle ; ( 3 ) the pith and resins canals are absent in the toots ; ( 4 ) secondary structure occurs in the root hair zone, and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem ; ( 5 ) tanning materials are abundant in pericycle cells and phelloderm cells ; ( 6 ) sclereids are found in secondary phloem, and rays are rather rich in secondary xylem
結果表明：氣生不定根具有以下結構特徵和發育特點： （ 1 ）根為二原型，側根正對著木質部發生； （ 2 ）幼根內皮層細胞具凱氏帶加厚，維管柱內緊挨中柱鞘內側具有2 ~ 4層大型薄壁細胞； （ 2 ）根中無髓和樹脂道； （ 4 ）次生結構發生於根毛區，維管形成層由初生木質部和初生韌皮部之間的薄壁細胞轉化形成； （ 5 ）中柱鞘和栓內層細胞富含單寧類物質； （ 6 ）次生韌皮部有石細胞，次生木質部射線發達。Cnn ) - - china ' s first astronaut yang liwei is in orbit following a successful launch wednesday morning from the jiuquan launch site in the western gobi desert, state media reports
據中國國家媒體報道，隨著星期三早晨在靠近戈壁沙漠的一次成功發射，中國的第一位宇航員楊利偉進入地球軌道。Tracking cameras at xichang had an excellent view of the intercept from the front, while cameras at china ' s other major launch site at jiuquan in the gobi desert had an equally good viewing angle from behind
西昌的測控相機從正面拍攝攔截的視角極佳，而中國另一位於戈壁沙漠中的主要發射場-酒泉發射場從背後觀察的視角也同樣好。Albuminous cell 1. a vertically elongated parenchyma cell, found in groups in the rays of the secondary phloem in gymnosperms, where they are associated with sieve cells
蛋白質細胞： 1 .在裸子植物的次生韌皮部薄壁組織和韌皮射線中發現的1種垂直伸長的細胞，通常與篩胞相結合。Rontgen could not see anything coming out of the tube, but then he discovered that if he put the screen in the next room on the other side of a closed door, the rays still seemed to affect it
倫琴沒有看到試管里有東西，但是以後他發現如果他在隔壁房間另一個關閉的門上放一個屏風，這些射線仍然能夠影響它。In this paper based on the theory of the low energy electrons, the movement of the irons in the counter is analyzed. the theories of sputtering and secondary electron emission are discussed respectively. the irons " action and effect on the counter are putted forward
本文從低能電子發射機理入手，分析了計數管內部離子運動情況，討論了離子濺射和二次電子發射，提出了離子與計數管內壁相互作用及其對計數管的影響，給出了計數管內壁表面處理模擬圖。On a level with the floor on every stairhead there was a low window which resembled a deep, square venthole, while in lanterns fastened to the walls flaring gas jets crudely illuminatcd the surrounding squalor and gave out a glowing heat which, as it mounted up the narrow stairwell, grew ever more intense
每道樓梯的平臺邊，貼近地面都有一扇低矮的窗戶，方方正正地凹進去，像是氣窗。一些懸掛在墻壁上的燈籠，發出煤氣光焰，強烈地照射著這種種貧寒景物，還散發出一股熱氣，向上升騰，並聚積在各層狹窄的螺旋形樓梯下。It is designed with a special wall that shines or reflects sunlight into the box
這種設計是用一種特殊的爐壁發光或者反射太陽光到盒內。Y2o3 : eu nanotubes were synthesized by a surfactant assembly mechanism. tem image confirms the formation of the tubular structures. under the excitation of ultraviolet light, the nanotubes show luminescence properties different from that of y2o3 : eu nanocrystallites
低溫下的激光選擇激發光譜表明，處于納米管壁內部的發光中心具有較為確定的格位對稱性，其發射光譜具有清晰的光譜結構。Research on their field emission characteristics with fem and fim is helpful to the understanding of their field emission mechanism and the relationship of their end structures with their field emission properties. two methods of assembling swnts on tungsten tips such as physical method and chemical method were provided. the influence of different assembling methods on their field emission characteristics was analyzed
本文給出了將單壁碳納米管組裝到鎢針尖上的兩種方法，即物理組裝方法和化學組裝方法，並分析了不同組裝方法對單壁碳納米管場發射特性的影響，討論了單壁碳納米管場發射像與場離子像之間的對應關系以及單壁碳納米管場發射電流的穩定性及其影響因素等。The demonstration of heat - transfer measuring techniques and prospect of infrared thermal mapping techniques, main parts and performance indexes of a infrared camera, functional blocks and implementation of infrared processing software, experimental facility and measuring system of the wind tunnel has been made. the model emittance was experimentally determined and the three methods correcting directional emittance were compared. those problems of the infinite - slab model thickness and constant wall heat rates hypothesis, the determination of adiabatic wall temperature were discussed in a 1 - d heat conduction analysis
本文對紅外熱圖測熱技術與應用前景、紅外熱像儀主要部件與性能指標、紅外測熱數據處理軟體功能模塊與實現、風洞試驗設備與測量系統等進行了論述，測量了模型表面發射率並對發射率隨極角變化的三種修正方法進行了對比，對一維熱傳導分析中模型壁厚半無限假設、壁面熱流定常假設、絕熱壁溫選取等進行了探討。Planar laser induced fluorescence ( plif ) was used to study the spray / wall impinging in constant volume vessel. the experimental result show that when fuel spray impinging on the plane wall, wall jet was formed while fuel impinging on a plane wall with a bump, when the wall jet meet the bump, a secondary jet can be formed. some parameters affecting the secondary spray were studied, including bump height, the secondary impinging distance, impinging distance and injector parameters
對傳統燃燒室和bump燃燒室內燃油空氣混合過程進行了對比研究，發現燃油撞壁以後在傳統燃燒室壁面形成壁面射流，這一層燃油濃度很高，很難與空氣混合，而在bump燃燒室內，壁面射流遇到bump后，會在空間形成二次射流，二次射流進一步能快速與空氣充分混合。Deep in the vast and mostly unpopulated gobi desert, china ' s launch base is quietly awaiting the country ' s first - ever manned space flight
在遼闊無際人煙稀少的戈壁灘上，中國發射基地正默默等待著首次載人航天飛行時間的到來。At the jiuquan space center near the edge of the gobi desert in northern china, shenzhou 5 is being readied for launch
在中國北邊戈壁沙漠邊緣的酒泉衛星發射中心，神舟五號正蓄勢待發。The results of laser selective excitation indicate that the emission centers near the surface exhibit inhomogenously br oadened spectra while the two different symmetry sites inside the nanotube - walls present legible spectral structures. silicon nanowires were prepared by a thermal evaporation method
受表面缺陷的影響，納米管壁近表面的eu ~ （ 3 + ）離子處于較為復雜的微環境中，其發射光譜表現為非均勻展寬的光譜線形。A study of field emission of an array of multi - walled carbon nanotubes
多壁碳納米管陣列場發射研究In large rotating machinery using filmatic bearing ( turbogenerator, air compressor, etc. ) there is a potential trouble from impefect installation or running conditions, a metals " contact between rotors and shells. the trouble is usully called rubbing. the advantage of ae technologe in the rubbing diagnosis and early detection is showed. instead of classical ae characteristic parameters ( counts, amplitude, energy, duration and the other ones ) a new feature extraction by frequency analysis of ae envelop signals is discussed. both research of ae process and field experements indicate that periodic components in the envelop spectrum related to rotational speed increase evidently at the beginning of rubbing production, hence are highly sensitive to the rubbing fault diagnosis. according to the new design an acoustic emission equipment for the rubbing diagnosis named buaa ae testing system is developed and described
汽輪發電機、空氣壓縮機等採用油膜支撐的大型轉動機械，由於安裝或運行中的原因，在轉子旋轉過程中，可能和器壁發生輕微的摩擦和碰擊，簡稱碰摩.聲發射技術在碰摩發生特別是故障早期診斷上有優越性.本系統的特點是沒有沿用傳統的計數、幅度、能量和持續時間等聲發射特性參數，而是在聲發射包絡信號的頻率分析中進行特徵提取.聲發射發生的過程分析和現場試驗都表明這種方法對碰摩檢測很敏感，在碰摩發生的起始階段，包絡譜中與轉速同步的周期性分量顯著增加.根據這種新的設計思想自行研製了buaa碰摩聲發射檢測儀並對此作了介紹The present development of field emission characteristics of single walled carbon nanotubes ( swnts ) and zinc oxide nanowires at home and abroad was introduced, their field emission characteristics were studied with field emission microscope ( fem ) and field ion microscope ( fim ). several problems about electric field in the field emission have been simulated with finite element method
本文介紹了單壁碳納米管和氧化鋅納米線場發射的國內外發展概況，用場發射場離子綜合測試儀研究了它們的場發射特性，並用有限元法模擬了場發射中與電場有關的幾個問題。Carbon nanotubes were regarded as one of the most outstanding field emission materials, but up to now the viewpoints on their field emission mechanism were different. swnts " structure is simple and the relationship of their structure and properties is direct
單壁碳納米管的結構較為簡單，結構與性能之間的關系比較直接，用場發射場離子綜合測試儀對其場發射特性進行研究有助於對其場發射機理的認識，明確單壁碳納米管的埠結構與其場發射特性之間的關系。The controller at the jiuquan satellite launch center in northern china ' s gobi desert announced the lift - off
位於中國北部戈壁沙漠的九泉衛星發射中心的指揮官宣布了發射。分享友人