線形動物 的英文怎麼說
中文拼音 [xiànxíngdòngwù]
線形動物
英文
nematomorpha-
3 the comparison of mitochondrial genomes and phylogentic relationships of amphibian there still is a lack of consensus regarding living amphibian phylogenetic relationships. the most widely accepted hypothesis, based on morphological data, supports the monophyletic origin in the late paleozoic ( 300 mya ) of the three living orders in the class amphibia and a sister - group relationship between caudata and anura ( the batrachia hypothesis ) to the exclusion of the gymnophiona
3兩棲類動物的線粒體基因組結構比較和系統發生關系現存兩棲類的三個目的系統發生關系仍然沒有統一意見,最廣泛被接受的假說,是建立在形態學證據基礎上,支持現生的兩棲類三個目在古生代後期( 300mya )單系起源,並且無尾類和有尾類為姐妹群關系(蛙類假說) 。The scielltific computational theories and methods on bird strike to the windshield of aircraft have been systematically studied and summed up in this thesis, such as fem comptltational principles and procedures to elastic dynamic problems under the conditions of small and non - linear finite deformation, 3d viscous elastic constitutive theory and incremelltal expression under the consideration of the rate effect of non - metallic materials like the aircraft windshield, and the numerical compatational principles and key constitutions for impact - contact dynamic subjects
2 、系統學習並歸納總結了鳥體撞擊風擋結構問題中的科學計算理論與計算方法。按照鳥撞問題數值計算方法逐步深入的思路,系統總結了小變形結構動力學有限元數值計算方法、有限變形的幾何非線性有限元數值計算方法、粘彈性體非線性形變的本構物理關系;對于實施復雜結構有限元動力學計算的載荷增量方法提出了對newmark差分的改進以及進行材料與幾何非線性數值計算的細致步驟。The former is a kind of brachiopod and the latter belongs to vermes. the fossils of each sub - dominant species took its place from three percent to five percent in quantity. on one hand, the fossils of early vertebrata, hemichordata, urochordata, cephalochordata and vetulicolian which connects invertebrata and vertebrata have been caught one by one in the continuous excavating work of early life institute field work team of north west university since 1996
他們還認為節肢動物長尾納羅蟲( naraoialongicaudata ) 、刺狀納羅蟲( naraoiospinosa )和耳形等刺蟲( isoxysauritus )以及腕足動物東方日射水母貝( heliomedusaorienta ) 、線形蟲動物圓筒帽天山蠕蟲( maotianshaniacylindrica )均為次優勢種,它們的個體數量分別占化石總數的百分之三到五。By the means of ruleless arrangement, unique arrangement or inerratic reiteration, suture can form various patterns, which trace primarily intends to oversew three layers of materials hard, and prevent movements of fillings such as spray - glue cotton, wool, plume and so on. on the other hand, the trace can impress the sense of three - dimension and make it panoplied
絎縫是利用縫線在物料上組合成無規則排列和獨立的或者是有規則排列重復的各種圖形的軌跡,這些圖案不只是為了牢固地縫住三層物料,防止填充料移動,還可以增強縫製品的立體感,提高其裝飾功能。The fractal theory application to fault diagnosis is tried in order to overcome the defec t of wavelet transform to nonlinear signal analysis and complicated machine diagnosis, including the concept, function and application about fractal dimension and the process of applying it to analyze the libration signal of rolling bearing and engine burning
針對小波變換分析復雜非線性機械繫統時表現出的力不從心,又嘗試探討了分形理論在故障診斷領域中的應用,討論了分形維數的概念、物理意義和應用,並通過滾動軸承和發動機燃燒振動信號的分析例示探討和展示了應用分形方法進行故障診斷的方法和過程。If many forces are acting simultaneously in different directions on any body, the direction of its motion will not correspond with any one of the forces, but will always follow a middle course, the summary of them, what is expressed in mechanics by the diagonal of the parallelogram of forces
如果同時有許多各種不相同的力作用於某一物體,該物體運動的方向不可能與任何一個力的運動的方向相符合而總是平均最短的方向,即力學所說的平行四邊形的對角線。In this thesis, based on pershing ii surface to surface missile, a new kind of ballistic missile was designed with an additional rocket engine, which can be ignited twice. firstly, aerodynamic computational models of missile body and warhead which reentry with supersonic are built according to the task requirements ; secondly, the propulsion system model of missile is built whose first two stages are solid rocket engines and the third stage is liquid - solid combined rocket engine. the nozzle and the shape of the engine are designed to meet the needs of the populsion project ; thirdly, the trajectory model of the mass point is built and a wavy trajectory is designed & optimized ; finally, the ability of a missile ' s breaking through defence is analyzed
以美國潘興導彈為原型,增加可兩次點火的末級發動機,改裝成具有跳躍能力的地地彈道導彈;首先,根據任務需求,建立了導彈的氣動模型,並建立了彈頭再入時高超聲速氣動模型;其次,建立了導彈推進系統模型,前兩級採用了固體火箭發動機,第三級採用了固?液組合火箭發動機,並在總體方案要求下,對發動機噴管和外形進行了設計;第三部分,建立了導彈質點彈道模型,設計了一條跳躍式彈道,並對跳躍式彈道進行了優化設計;最後,對導彈進行了突防能力分析,從分析的結果可以看出,跳躍式彈道的突防能力比常規的拋物線彈道要強。Woven wire mesh series : stainless steel wire mesh, brass wire mesh, copper wire mesh, phosphor bronze wire mesh, barbecue grill mesh, crimped wire mesh, low carbon steel wire mesh, mild steel wire mesh, black wire cloth, window screening netting, vibrating sieving mesh, filter for gas and liquid, conveyer belt, chain link fence, galvanized square wire mesh, hexagonal wire mesh
此網帶由雙股右螺旋或由雙股左螺旋盤條與一根串條連接而成,網帶拼接方便,網眼一般小於單股加強編織的網眼,編織牢固,不易變形,維修方便。能用於高溫的自動流水線,輸送重物,機械工業上零件的熱處理,各種較大物品的烘乾。The composition of sample was identified by means of x - ray diffractometer ( xrd ). magnetic properties were measured by vibrating sample magnetometer ( vsm ). the combustion behavior and crystallization process of the gel were studied by means of differential thermal analysis - thermogravimetric analysis ( dta - tg )
利用x射線衍射儀( xrd )確定樣品物相,振動樣品磁強計( vsm )進行磁性測量,綜合熱分析儀研究凝膠的燃燒和析晶過程,掃描電子顯微鏡( sem )和透射電子顯微鏡( tem )觀察粉末的形貌與粒度。Although paleontologists had known for many years that the bones of dinosaurs contain growth lines, something like the circumferential growth rings we see in trees, it was only in the second half of the 20th century that they began to use these growth lines and other structures inside the bones to figure out how these extinct animals actually grew
雖然早在許多年前,古生物學家就已經知道,恐龍骨骼里有著類似樹木年輪的生長線;但直到20世紀後半,生長線及骨骼中的其他結構,才被用來研究這些已滅絕動物的生長情形。One of the branches is environmental archaeology. environmental archaeology development experienced three stages, linear model, early systematic model and later systematic model. four research areas, are formed gradually including geoarchaeology, archaeobotany, zooarchaeology and bioarchaeology
環境考古學的發展經歷了線形模式階段系統模式前階段和系統模式后階段3個時期,並逐漸形成4個主要的研究領域:地學考古植物考古動物考古和分子生物考古,其中地學考古涉及到地貌學沉積學土壤學和地質年代學。This paper presents the displacement solution to mine elevator viscoelastic vibrating equations and the kinetic tension calculation method, discusses kinetic tension characteristics under rectangular, ladder shaped, sinusoidal and parabolic acceleration curves, provides ways to limit or even avoid lifting rope viscoelastic vibration
摘要給出了礦井提升機粘彈性振動方程的位移解及動張力的計算方法,研究了採用矩形、梯形、正弦形、拋物線形加速度時銅線繩的動張力特性,給出了限制和消除提升鋼絲繩粘彈性振動的方法。The geoglyphs depict living creatures, stylized plants and imaginary beings, as well as geometric figures several kilometres long
有些線條圖描述了活著的動物、植物、幻想的形象,還有數公里長的幾何圖形。Morphological changes were found in immu nized rabbits such as the enlargement of ventricles, myofibrillar lysis and necr osis, mitochondria swelling and condensation
形態學方面免疫組動物心臟顯示有明顯改變,如室腔的擴大,灶性肌絲溶解、壞死,線粒體數目增多、腫脹和聚集,等等。The analysis results indicated that the earth pressure was related to the material in properties pattern, distributed in parabolic pattern, and its value was greater than the active earth pressure
結果表明,此類擋墻墻背土壓力的分佈與填料及地基材料參數有關,一般呈拋物線形分佈;土壓力的大小遠大於主動土壓力。To display animations with raster systems, animated objects ( which may consist of graphical primitives such as lines, polygons, and so on ) must be scan - converted into their pixmap in the frame buffer
為了在光柵系統中顯示動畫,必須將運動物體(由如線,多邊形這樣的圖元組成)經掃描轉換變為可在幀緩存放的位圖。In the first part of this thesis, the method of data collection for building a 3d scene based on a planar vector map is studied. to the most difficult problem in data collection : the evaluation of contour line, a suit of effective automatic assisting method is advanced, which can remarkably shorten the process period and improve the efficiency of spatial data collection. the main idea of this method is " control point congregating automatically and close control point cooperating "
本文主要研究了基於二維矢量圖如何獲取構建三維場景所需的空間數據,包括地形、地物的二維數據採集與三維建模方法,並針對數據獲取中的主要難題,即等高線高程賦值問題,提出了一種基於高程式控制制點自動聚集、相近控制點協作的自動處理方法,顯著縮短空間數據獲取的處理周期。A curve is regarded as the trace of a moving body, the force acting on which decides the shape of the curve. through some necessary shape transformation, the shape distance or shape difference between two open curves can be valued by comparing their mechanical causation. therefore, the purpose of recognizing open curves is reached
曲線可以看成是物體運動的軌跡,那麼物體在運動過程中所受到的力就決定了曲線的形狀,將兩條曲線適當地變形之後,通過比較各自的形狀形成的力學原因,就可以計算出它們的形狀差異或形狀距離,從而達到曲線形狀識別的目的。Aperture synthesis sonar, as its name implies, synthesizes an aperture by storing successive echoes obtained from a moving platform and by processing the results as if they had been obtained from a multi - element array enables a high azimuth resolution to be obtained from a physically small array
合成孔徑聲納,顧名思義就是通過小孔徑物理聲陣的勻速直線運動,將沿航跡方向的回波數據相干累加,形成較大的虛擬孔徑,從而提高方位解析度。合成孔徑技術相對于常規聲納技術的突出優勢在於,它只利用小孔徑的物理聲陣,就可以得到與徑向距離和頻率都無關的高方位解析度。In animal systems there are also small structures within the cells called mitochondria which use the energy stored in sugar molecules from food to form more highly ordered structures
在動物系統,也有一些小建築物內的細胞稱為線粒體,其中用能量儲存在糖分子從食品,以形成更多的高度有序結構。分享友人