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deep penetration     
相关语句
  深穿透
     Application and Cognition of Deep Penetration Compound Perforation Technology in Low-permeability Oilfields
     深穿透复合射孔技术在低渗透油田的应用与认识
短句来源
     The Study of the Application of High Power, Deep Penetration Laser Welding in the Manufacturing of Pressure Vessles
     大功率深穿透激光焊接在压力容器中的应用研究
短句来源
     Study on laser deep penetration welding of metallic materials
     高功率CO_2激光深穿透焊接的研究
短句来源
     Ultrahigh pressure deep penetration perforating fracturing technology is the combination of high energy gas fracturing technology with deep penetration perforating fracturing technology.
     强超压深穿透射孔及压裂技术是综合了高能气体压裂技术和深穿透复合射孔技术的优势 ,利用高能气体压裂技术起压快速 ,易形成强超压区的特点和深穿透复合射孔技术射孔穿透能力强的优点 ,二者相互结合 ,进一步提高了深穿透复合射孔穿透地层的能力 ,提高了射孔效果。
短句来源
     Study and Application of Deep Penetration Unplugging Technique with High Pressure Abrasive Water Jet
     高压喷砂水射流深穿透解堵技术的研究与应用
短句来源
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  深熔
     Numerical simulation of deep penetration in electron beam welding of Ti_3Al intermetallic compound
     Ti_3Al金属间化合物电子束深熔焊接过程数值模拟
短句来源
     Researches on the deep penetration welding of high-temperature steel (35CrMo)by using CO 2 laser are performed.
     使用CO2 激光器对 3 5CrMo耐热钢材料进行激光深熔穿透焊接研究 ,通过焊接、焊缝机械强度等试验获得了激光焊接的最佳工艺参数。
短句来源
     Experimental Study on Plasma inside the keyhole in Deep penetration laser welding
     激光深熔焊接小孔孔内等离子体的实验研究
短句来源
     Diathermancy Study on Keyhole Effects in Laser Deep Penetration Welding
     激光深熔焊接小孔效应的传热性研究
短句来源
     Study of Laser-Induced Plasma Behavior and Control During Laser Deep Penetration Welding of Powder Materials
     粉末冶金材料激光深熔焊接光致等离子体行为及控制
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  深穿
     Dynamic focal spot and extremum effect of deep penetration of electron beam
     电子束流的动态焦点和深穿极值效应
短句来源
     Using the simple model of molten pool, the inherence relation of the different measurement methods with the welding property is illuminated. The conception of dynamic focal spot is set up, and the factors which influence the dynamic focal spot are discussed. Furthermore, the characters of dynamic focal spot are analyzed, and the most important character is the extremum effect of deep penetration of electron beam.
     通过分析具有焊接特征的焦点测量方法 ,利用简单熔池模型说明了具有焊接特征的不同焦点测量方法之间的内在关系 ,建立了电子束流的动态焦点概念 ,讨论了动态焦点的影响因素 ,进一步分析了动态焦点的性质 ,其中最重要的性质是深穿极值效应。
短句来源
  “deep penetration”译为未确定词的双语例句
     MVC was significantly higher in tumors with deep penetration ( P <0 05), lymph node metastasis ( P <0 001) and distant metastasis ( P <0 05) than in those without invasion and such metastasis.
     MVC与癌组织浸润的深度(P<0.05)、淋巴结转移(P<0.01)和远处转移(P<0.05)有关。
短句来源
     RE-B-C-N Multi-Elements Deep Penetration of 20CrMnTi Steel Pressure Roller
     20CrMnTi钢压辊深层稀土硼碳氮共渗
短句来源
     An explosively formed penetrator (EFP) with fins has the advantages of stable flight and deep penetration.
     带尾翼的杆状爆炸成形侵彻体 ( explosively formed penetrator,简称 EFP)具有良好的飞行稳定性和侵彻性能 .
短句来源
     Developed is a HSD89 perforator integrating high shot density and deep penetration together.
     研制了集高穿深和高孔密于一体的HSD89型射孔器。
短句来源
     CO 2 gas was used as the shielding gas to eliminate porosities in deep penetration laser welding of low carbon steel in this paper.
     采用CO2 作为保护气体消除大熔深激光焊接低碳钢时易发生的气孔问题 ,并对比研究了CO2 和Ar气保护条件下 12mm厚低碳钢板激光焊缝的组织和韧性。
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  deep penetration
In laser welding with power density beyond 104 W · mm-2, the formation of plasma cavities, commonly referred to as keyholes, leads to deep penetration welds with high aspect ratios.
      
Factors controlling the magnesium weld morphology in deep penetration welding by a CO2 laser
      
An analysis of weld morphology which typically occurs in deep penetration welding processes using electron or laser beams is presented.
      
Results of a numerical simulation of deep penetration welding of 304 stainless steel are presented.
      
Simulation of deep penetration welding of stainless steel using geometric constraints based on experimental information
      
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One of the most difficult problems of using the discrete-ordinate method insolving deep-penetration shielding problem is that the unaccelerated transportsolutions converge very slowly.The whole system acceleration method is provedinefficient while the conventional coarse-mesh rebalance method may yield anunstable algorithm.In this paper,another coarse-mesh rebalance method,namelyan zone-dependent acceleration method,is developed.The numerical stability is proved both in theory and practice.The method...

One of the most difficult problems of using the discrete-ordinate method insolving deep-penetration shielding problem is that the unaccelerated transportsolutions converge very slowly.The whole system acceleration method is provedinefficient while the conventional coarse-mesh rebalance method may yield anunstable algorithm.In this paper,another coarse-mesh rebalance method,namelyan zone-dependent acceleration method,is developed.The numerical stability is proved both in theory and practice.The method isproved tobe more efficient than the whole system acceleration method by a factorof 20.

在用离散座标法解屏蔽问题时,一个很重要的问题是如何加速内迭代收敛。采用整区平衡加速法是低效的,而目前流行的一般粗网再平衡加速法会导致数值不稳定。本文导出了另一种粗网再平衡加速法——区域相关加速法,并从理论和实践上证明它是一种既高效又数值稳定的加速方法。最后计算了一个实例,结果表明,该方法的一次外迭代所化的计算时间只是整区加速法的1/20。

Porous titanium is a kind of new biomaterial. After being implanted into the bone, the ingrowth of the bone was demonstrated. This ingrowth of bone tissuse was thought to be beneficial to fixation of a prosthesis and filling of a bone cavity.In this study, the porous sample was abtained from sintered amorphous titanium powder, with the mean size of pores larger than 150μ in diameter, and the porosity in the range of 45-47%. It was implanted into the femurs of rabbits and dogs, and specimons were taken for examination...

Porous titanium is a kind of new biomaterial. After being implanted into the bone, the ingrowth of the bone was demonstrated. This ingrowth of bone tissuse was thought to be beneficial to fixation of a prosthesis and filling of a bone cavity.In this study, the porous sample was abtained from sintered amorphous titanium powder, with the mean size of pores larger than 150μ in diameter, and the porosity in the range of 45-47%. It was implanted into the femurs of rabbits and dogs, and specimons were taken for examination 2, 4, 6 and 12 weeks after operation.It was shown that the shear strength of the samples at the implant bone surface was 7.51kg/cm2 2 weeks after surgery. It was demonstrated that bone tissue had begun to grow into the meshwork 2 weeks after surgery, and deeper penetration was seen after 4 weeks. Scanning electron microscopy was done to show the appearance of bony growth into the meshwork. Bony growth was verified by x-ray diffraction scan analysis for calcium. Bone ingrowth could be seen in the majority of the interstices of the meshwork 12 weeks after surgery. Bone lacuna and tubules could be seen when stained with silver nitrate. The deepest penetration of bone ingrowth was 1400μ. There was no obvious tissue reaction or formation of fibrous membrane.The use of the porous material may help to prevent loosening of a prosthesis. It is believed that porous titanium we used possesses the characteristics that a porous material should possess. Further research should be done to ascertain its clinical usefulness.

本实验系将无定形粉末烧结体多孔钛植入兔和狗的股骨内,术后定期采取标本,测定骨质与多孔钛界面结合力,对骨磨片酸性复红染色进行光学显微镜检查及扫描电镜观察骨质长入情况。 结果试样与骨质界面结合力达7.51kg/cm~2,骨质长入孔隙,深度1,400μm,扫描电镜显示骨质长入,钙的K_αX线照象证实为钙化的骨质。未发现明显的组织反应和包膜形成。证明国产多孔钛生物相容性良好,具有多孔材料特点,可作为进一步研究应用的基础。

There exist some difficulties if the general Monte Carlo method is used for the deep penetration problem. In this paper,a new small region method in Monte Carlo calculation for the deep penetration problems is proposed. Based on this,two kinds of the small region methods are given, namely, the small region method for the plane geometry and the small region method for the spherical geometry. The practical calculation by examples indicates that the small region method is better and feasible. In this...

There exist some difficulties if the general Monte Carlo method is used for the deep penetration problem. In this paper,a new small region method in Monte Carlo calculation for the deep penetration problems is proposed. Based on this,two kinds of the small region methods are given, namely, the small region method for the plane geometry and the small region method for the spherical geometry. The practical calculation by examples indicates that the small region method is better and feasible. In this way, the difficalty of the general Monte Carlo method for solving deep penetration problem is overcome.

对于深穿透问题则一般蒙特卡罗方法存在一定的困难。本文提出了一个新的蒙特卡罗计算深穿透问题的小区域方法。在此基础上给出了两个小区域方法,即平几何小区域方法和球几何小区域方法,通过例子的实际计算表明,小区域方法是比较好的和可行的,克服了一般蒙特卡罗方法解深穿透问题的缺点。

 
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