極尖高度 的英文怎麼說
中文拼音 [jíjiāngāodù]
極尖高度
英文
tip height-
The central peaks of several craters on the flanks of syrtis major are made up of an even more silica - rich rock, granite, that may have formed by extreme crystal separation or by large - scale remelting of earlier basalts
在大三角側面，幾個火山口的中間尖點是由一種矽含量更高的巖石花崗巖所構成，可能是經極度晶體分化，或早期玄武巖大?圍重新熔融而形成。Due to their high aspect ratios and small tip radii of curvature, carbon nanotubes possess marvelous electron field emission properties, viz. low turn - on voltage ( e0 ) and large emission current density ( je ), and have good potential for using as materials in electron emitters of flat panel display
由於奈米碳管具有極高的縱橫比與極小的尖端曲率半徑，因此奈米碳管有著超乎常態的電子場發射特性，低的場發射起始電壓與大的場發射電流密度，使其為電子場發射平面顯示器的良好材料。Author thinks that the direction of the maximum plastic distortion along a constant radius around the crack tip may be considered as the direction of shear - mode fracture ( named pmax - criterion ) and the load when located shear band prongs the ligament in the front of crack tip is regarded as the limited load of shear - mode fracture. ( 3 ) the fad ( fracture assessment diagram ) of titled crack is proposed based on achievements of mesomechanics about i - ii complex ductile fracture of metal, and the titled crack is classified two kinds : void - mode fracture is assessed by fracture assessment curve, and shear - mode fracture by limited load. ( 4 ) using a fe program based on plantle - ressue theory to calculate some mesomechanical parameters, a flange joint structure of a high pressure vessel ( design pressure 31. 4mpa and the thickness of the hemispherical head is half of that of shell. ) is analyzed to determine whether the structure under operation pressure is safe or not, forecast the mode of potential invalidation and argue for the rationality of design of the structure
試件的整體斷裂為剪切型，但在試件芯部裂尖鈍化區中部出現了韌窩型啟裂並有一定的擴展，說明局部較高的應力三軸度也會使韌窩型機制得以發展，但是不改變試件整體的剪切型斷裂模式；對韌性斷裂的剪切模式的細觀機理做了一定的探討，並且提出了含裂紋構件剪切型斷裂的宏觀判據：認為裂紋前方的集中剪切帶中與裂紋尖端等半徑處最大有效塑性應變出現的方向可以作為裂紋剪切斷裂的方向（可簡稱為_ （ pmax ）準則） ，集中剪切滑移帶貫穿裂紋前方承載韌帶時的載荷可以作為極限載荷；本文運用金屬韌性斷裂細觀力學在一復合型韌性斷裂方面的研究成果，採用失效評定圖的形式，提出了傾斜裂紋的安全性評定方法的基本框架。In the paper, we put forward the combination of micro electronic technology, mems technology and vacuum micro electronic technology to develop a micro electronic pressure sensor with overload protection. the pressure sensor consists. of elastic anode membrane, isolation layer, vacuum micro cavity and field emission catelectrode tip array with overload protection. such pressure sensor has many advantages, such as high temperature stability, radiation resistance, fast response, high sensitivity, small volume, simple secondary instruments and bulk production
本文在重慶市科技「十五」項目的資助下，提出利用微電子技術、 mems技術和真空電子技術相結合的方法，研究一種帶過保護功能的真空微電子壓力傳感器，該壓力傳感器由帶過保護的場致發射陰極錐尖陣列、彈性陽極膜、絕緣層、真空微腔所構成，具有溫度穩定性好、抗輻射、快響應、高靈敏、體積小、二次儀表簡單、可批量生產等優點，具有廣泛的應用市場。One call a " cluck and purr " is much softer and competitors typically sit down on the stage to concentrate on the sound. " i thought i had a beautiful run until the last call, which was a cluck and purr, " pollard said
在這些「火雞叫聲」中，既有那種經常被獵人們模仿的年輕火雞的高亢尖利聲，也有一種聽上去極其柔和的「咯咯聲和咕嚕咕嚕聲」波拉德說： 「 『咯咯聲和咕嚕咕嚕聲』是一種難度頗高的叫聲。The calls can be high - pitched whistles like the " kee - kee run, " which is used by hunters to imitate a young turkey. one call a " cluck and purr " is much softer and competitors typically sit down on the stage to concentrate on the sound. " i thought i had a beautiful run until the last call, which was a cluck and purr, " pollard said
在這些「火雞叫聲」中，既有那種經常被獵人們模仿的年輕火雞的高亢尖利聲，也有一種聽上去極其柔和的「咯咯聲和咕嚕咕嚕聲」波拉德說： 「 『咯咯聲和咕嚕咕嚕聲』是一種難度頗高的叫聲。“ it makes no sense to tell well - trained, highly skilled individuals, many of whom are educated at our top colleges and universities, that the united states does not welcome or value them, ” mr gates said. “ america will find it infinitely more difficult to maintain its technological leadership if it shuts out the very people who are most able to help us compete
「這等於告訴訓練有素、高度熟練的工人，美國不歡迎或者不重視他們，這毫無道理，何況他們中許多人還在我們的頂尖學院和大學中受教育， 」蓋茨表示， 「如果美國將恰好最能幫助我們進行競爭的人關在門外，那麼它將發現極難維持自己在科技方面的領導地位。 」Medieal needle with two elastic eyes is made of high quatified stainless steel. the spear is sharp, even, tough and elastic. it is not necessary to thread a needle bceause the suture can be easily tumbled in the eyes
醫用雙孔彈機孔縫合針是用高級不銹鋼絲材料製成，針尖鋒利，刺穿順暢，硬度、彈性、韌性、光潔度極佳，為方便醫生使用，針孔不用穿線，只需把線嵌入即可使用，操作簡易安全方便。Using field emission cathode, x ray source can be made with several advantages : smaller volume and brighter, high frequency response, in - time turning on, etc. considering of the merits and potential markets, researching and fabricating miniature x - ray source is meaningful
由於突起數目大且尖端頂端電場強度高，因此產生很大的場發射電流密度。採用場發射陰極的x射線光源具有體積小，輻射強度高，頻率響應快，可以隨時開啟，無需預熱的優點。The structure of field emission triode is first simulated by magic. the tip height, tip position, tip curvature, gate aperture, and gate voltage are changed, to observe the emission current and the electron congregation
本課題首先採用magic軟體對三極體結構的尖錐場發射陰極進行了模擬計算，分別改變尖錐高度，錐尖位置，尖錐曲率半徑，柵極孔徑及柵極電壓，觀察陽極收集電流及電子束的會聚情況。分享友人