dimensional precision 中文意思是什麼

dimensional precision 解釋
尺寸簡圖
  • dimensional : adj. 1. 尺寸的。2. 空間的。3. 【數學】因次的；…次（元）的。
  • precision : n 精密，精確性；嚴格；精密度；【修辭學】精確。 arms of precision 裝有瞄準儀的槍炮。adj 精確的，精...
  1. The complex function between isochromatic fringe orders and rgb gray values of the image pixels is described by bp artificial neural network. the technique can improve the precision of experimental stress analysis in three - dimensional photoelastic thin slices

    其特點是通過bp神經網路建立圖像中像素點的r 、 g 、 b顏色值與條紋級數n之間的非線性關系；可以準確地得到3級以內等色線條紋級數。
  2. On the basis of experimental research, this thesis applies 2 - dimensional non - linear finite element method to the analysis of transient temperature field on the section by means of relatively high precision triangular element of six joints. when the temperature field is analyzed, finite element reseaus are divided in space field and finite difference reseaus are divided in time field, and then the program is compiled. the computing results are in good agreement with the test data

    在試驗研究的基礎上，本文採用精度較高的三角形六結點單元對構件截面二維非線性瞬態溫度場進行了有限元分析，即在空間域內採用有限元網格劃分，在時間域內採用有限差分網格劃分，據此編制了計算程序，計算結果與試驗數據符合較好，程序穩定性好，精度滿足要求。
  3. Two numerical examples of simple component in two and three dimensions are analyzed respectively by using the formulated transition element. the calculated results show that the formulated transition element can realize the transition between elements with different mesh densities and the calculated stress has a higher precision, which suggests that the transition method using the formulated two dimensional and three dimensional transition element is feasible for the transition between different meshes of elements in the multi - scale damage modeling

    進行了相應的數值分析，應力計算結果表明：構造的過渡單元能夠實現疏密網格之間的單元過渡，應力計算性能良好，表明文中所提出的過渡單元的連接過渡方案是可行的，初步實現了結構跨尺度損傷模擬過程中所需要的疏密網格單元之間的過渡。
  4. Three - dimensional flow over flat wall is simulated by virtue of large eddy simulation. the subgrid model is germano dynamical model and the numerical difference scheme is center difference scheme of two - order precision. the outcomes can be validated by its experimental counterpart

    亞格子模型採用germano動力模型模擬，數值差分格式採用具有二階精度的中心差分格式對平壁流動進行三維大渦模擬，模擬結果通過與實驗結果的比較得到驗證。
  5. The dual - time stepping method proposed by a. jameson is applied to improve time precision for unsteady flowfield computation. the three dimensional grid for projectile with lateral jets, especially body - fitted for lateral jets exit, is generated by improved traditional methods with projection and zonal method

    在改進傳統網格生成方法的基礎上，結合投影映射、分區拼接技術生成了彈丸側噴流場單一區域三維計算網格，在側噴流噴口邊界實現了網格貼體化。
  6. Moreover, in order to pursue dimensional precision and shorten the time required for grinding, we make the surface roughness of the electro - discharge and nc direct carving processes as small as possible, and apply this technique to the light guide plates, etc., for which mirror polishing is required

    為追求尺寸精度和縮短打磨加工時間，我們盡可能降低放電加工和nc直雕面的粗糙度，並應用於要求具有鏡面光潔度的導光板等加工中。
  7. Many arms originally are high precision products, if we want promote its performance, might further more, we must enhance the dependability and precision of the system, it brings out higher requirements of the designing, machining, specially assembling, all of these needs dimensional chain calculation

    許多武器裝備本來就是高精尖產品，如果要進一步提升其性能、威力就必然要提高系統的精確度和可靠性，這些對設計和加工特別是裝配都提出了更高的要求。
  8. The estimation of additive and dominance effects through qtl analysis by one - dimensional search while ignoring epistases showed similar accuracy to that by two - dimensional search by including epistases. existence of epistases could decrease the precision for the estimation of additive and dominance effects. the estimation of genetic main effects would be biased if ignoring the interaction effects of qtl x environment ( qe )

    忽略上位性效應的一維搜索qtl分析對加性效應和顯性效應的估計精度與包括上位性的兩維搜索qtl分析對這兩種效應的估計精度相差不大，上位性的存在可能會降低對這兩種效應估計的精度；忽略qtl環境（ qe ）互作效應會導致對遺傳主效應的有偏估計，而包括qe互作效應的多環境聯合分析能夠提高對遺傳主效應的估計精度。
  9. Abstract : approximate methods for calculating aerodynamic heating rates on space shuttles are discussed. various methods are given for predicting the heating rate at axisymmetric stagnation points, general three dimensional stagnationpoints and the leading edge stagnation point of wings. numerous laminar and turbulent heating techniques for flat plates and cones are analyzed and compared. a brief review of some methods is presented to predict heating rate for winward centerline and lateral direction off the symmetry plane. the results show that the methods are simpler and can guarantee enought precision for predicting aerodynamic heating environment of space shuttles

    文摘:介紹了國內外預測航天飛機氣動加熱的工程計算方法.給出了軸對稱、非軸對稱和機翼前緣等各種外形駐點熱流密度的計算，分析和比較了平板、錐體的層流和湍流熱流密度計算的各種方法，概述了航天飛機迎風面中心線和離開中心線橫向熱流密度的計算.計算結果表明，本文方法用在航天飛機氣動熱環境初步設計中比較簡單並且有足夠精度
  10. The determination of node releasing criterion in three dimensional finite element backward simulation of blade precision forging

    葉片精鍛三維有限元反向模擬脫模準則的確定
  11. Compared with the existing rp methods using high energy density beams, the hpdm method solved the key problems of insufficient dimensional precision and surface quality caused by the step effect and no - supporting, and puts forward a new way to directly manufacture the difficult - to - machining materials parts with short - routine, low - cost and high quality

    該技術解決了現有高能束熔積成形技術因無支撐和臺階效應造成的尺寸精度和表面質量不高的瓶頸問題，是難加工材料零件短流程、低成本、高質量無模精確製造的新的有效加工方法。
  12. And then, in the simulation of three - dimensional, the application of o - type grid and hybrid grid are used in two relatively complicated structures make the total amounts of grids and the time of grid generation reduced greatly. moreover the hexahedron grids are placed in most areas to provide higher precision. through the comparison between the results of two - dimensional and three - dimensional simulation, we knew two - dimensional calculating is not adequate

    本文用簡單、方便的二維模型作為數值計算的起點，使用耦合隱式演算法以及先進的v2f湍流模型進行求解，成功地捕捉到了激波，觀察到主氣流從壁面的分離、切換、再附壁等現象，並對計算結果進行了細致的分析，得出一些有意義的結論；在此基礎上，本文在國內外首次對超音速射流雙穩閥的三維流場進行了計算。
  13. In this thesis, the basic aspects about forming process and mould for cold precision rotary forging of common bevel gear are studied with method of theory and experiment. the rules and numerical relations of dimensional precision relaying among common bevel gear part, die cavity and tool electrode are established. meanwhile, the design and calculation methods for process parameters, mould, common bevel gear forging and preform and tool electrode are established

    本論文對傘齒輪冷擺輾精密成形工藝的若干問題進行了系統的理論和實驗研究，深入分析了傘齒輪冷擺輾精密成形工藝的物理力學本質，確定了傘齒輪產品零件?模具?電極之間的幾何尺寸精度傳遞規律和數值關系，建立了冷擺輾精密成形工藝參數和模具、傘齒輪鍛件和預制坯、工具電極的設計計算方法。
  14. Impact of chlorine dioxide disinfectant spray on the dimensional precision of alginate impressions

    二氧化氯噴霧消毒對藻酸鹽印模模型精度的影響
  15. The effects of abs resin shrinkage during prototyping on dimensional precision of workpiece and the method of control and compensation over shrinkage have been studied theoretically and experimentally

    首先通過理論和實驗研究了成型過程中abs樹脂材料收縮對零件尺寸精度的影響，以及收縮的控制與補償方法。
  16. Rapid prototyping manufacturing ( rpm ) and rapid tooling ( rt ) can rapidly fabricate complicated prototypes and various mould & dies of higher dimensional precision and better surface roughness respectively. with those technologies, the objective of rapid product development ( rpd ) can be achieved consequently

    快速成型技術（ rpm ）與快速模具製造技術（ rt ）能分別用來快速製造具有復雜形狀的原型及具有高尺寸精度和低表面粗糙度的各類工模具，因而利用這兩種技術能實現快速產品開發的目的。
  17. Tolerance distribution and measures of microband dimensional precision ahout the internals of microband box

    微帶盒內腔的公差分配及尺寸精度的保證措施
  18. We are developing our steel fitting - use hardware centered on zinc alloy die casting, which produces outstanding dimensional precision

    鋼制建築器具用金屬配件以鋅合金模鑄件為主，具有極佳的尺寸精度。
  19. With prestressed rolling mill of the middle steelworks of taiyuan iron and steel limited group company as the researched object, this article analyze the existent questions and research the initial stress of prestressed rolling mill and computer control system, analyze the design thought of prestressed rolling mill and clarify the relationship between the dimensional precision of rolled material and the rigidity of base of rolling mill and the main method to increase the rigidity of base of rolling mill, analyze how to confirm the rigidity, sectional area of handle and post, and pretightening force, put forward the viewpoint that the key to assure great rigidity is to assure that the remnant initial stress is always positive during rolling, and develop intelligent control system with plc as the core on the basis of the former research to assure that the remnant initial stress is always positive during rolling

    本文以太鋼集團公司中型型鋼廠預應力軋機為對象，分析了該廠預應力軋機所存在的問題，對預應力軋機的預應力以及微機控制進行了系統研究；分析了預應力軋機的設計思路，闡明了軋材尺寸精度與軋機機座剛度的關系及提高軋機機座剛度的主要途徑；分析了預應力軋機設計過程中預應力軋機的剛度、預緊拉桿和機架立柱斷面積及預緊力的確定；提出了預應力軋機保證高剛度的關鍵就是「確保軋制過程中，殘余預應力始終大於零」的觀點；在前述研究的基礎上開發了以可編程邏輯控制器為核心的智能監控系統，以確保「軋制過程中，殘余預應力始終大於零」這個要求。
  20. A superalloy double helix integrated impeller with good performances of dimensional precision, microstructure and mechanics was rapidly manufactured by hpdm ( hybrid plasma deposition & milling ) method proposed by author ' s, laboratory, which synthesized plasma deposition as an additive technology, and milling as a subtractive technique during the processing

    摘要採用等離子熔積與銑削復合製造技術，在等離子熔積成形過程中復合銑削精整，試制了難加工高溫合金雙螺旋整體葉輪樣件，其組織性能和力學性能均高於採用傳統工藝加工獲得的葉輪。
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