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mechanical entrapment
相关语句
  相似匹配句对
     On the Entrapment
     警察圈套刍议
短句来源
     To Treat Cutaneous Nerve Entrapment Syndrome by Mechanical Vibration
     机械振动疗法对上背部皮神经卡压综合征的治疗作用研究
     and mechanical refrigerator.
     机械制冷机。
短句来源
     On "Entrapment News"
     试论“陷阱新闻”
短句来源
     Electromechanical & Mechanical
     机电与机械
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  mechanical entrapment
Mechanical entrapment, arrest determined by specific recognition between neoplastic cells and capillaries and organ-determined modulation of tumor growth have all been suggested as mechanisms that regulate this specificity.
      
Organ-specific formation of colorectal metastases appears to be mainly mediated by specific interactions between circulating carcinoma cells and the vessel wall of target organs but not mechanical entrapment.
      
By adjusting its shape and passing through the narrow microvessel segment, neoplastic cell avoids mechanical entrapment.
      


On the basis of analysis of magnetic field characteristics around ferromagnetic fibre and polyfibres by means of the finite difference solution, the mechanical entrapment of nonmagnetic particles in high gradient magnetic separation (HGMS) is preliminarily discussed.An alternative electromagnetic vibration technique has been worked out by the authors to improve the solid-solid separation in HGMS. The trial use of the special technique in the separation of wolframite-quartz mixture and four types of the...

On the basis of analysis of magnetic field characteristics around ferromagnetic fibre and polyfibres by means of the finite difference solution, the mechanical entrapment of nonmagnetic particles in high gradient magnetic separation (HGMS) is preliminarily discussed.An alternative electromagnetic vibration technique has been worked out by the authors to improve the solid-solid separation in HGMS. The trial use of the special technique in the separation of wolframite-quartz mixture and four types of the actual slimes shows that the vibration high gradient magnetic separation is very effective to treat some paramagnetic mineral slimes.

[本文在采用有限差分法研究单根和多根钢毛周围磁场分布特性的基础上,讨论了高梯度磁分离过程中非磁性颗粒的机械夹杂问题,由此提出一种交流电磁振动技术以强化高梯度磁选中的固-固分离。对黑钨矿-石英混合物及四种实际矿泥的分选试验表明,振动高梯度磁选是处理某些弱磁性矿物细泥的一种有效的方法。

This paper covers the annual progress of mineral processing in China in 1985. Not all developments could be covered in the space available but the following main items are mentioned:——Crushing, screening, grinding and classification.——theories of beneficiation.——techniques and equipments of mineral processing.——flotation reagents.——solid/liquid separation.——the application of mathematical models and computers.——comprehensive utilization and environmental engineering.A new equation of comminution work, known...

This paper covers the annual progress of mineral processing in China in 1985. Not all developments could be covered in the space available but the following main items are mentioned:——Crushing, screening, grinding and classification.——theories of beneficiation.——techniques and equipments of mineral processing.——flotation reagents.——solid/liquid separation.——the application of mathematical models and computers.——comprehensive utilization and environmental engineering.A new equation of comminution work, known as the energy-yield equation, is established in terms of the comminution kinetics:and the equation has been examined by the grinding experiments on four kinds ores. The results obtained are satisfactory.In a study of the separation process in a shaking sluic, the pattern of fluid flow is analysed, the velocity profiles of fluid flow in various instants of time in one shaking cyle are illustrated and the ralationships between shearing rate of oscillating flow and the parameters of shaking are reported. The special stratification phenomenon has been found and the dispersive pressure of pulp in a shaking sluice has been calculated according to the modified Bagnod's equation.On the basis of analysis of magnetic field characteristics around ferromagnetic fibre and polyfibres by means of the finite difference solution, the mechanical entrapment of nonmagnetic particles in HGMS is prelminarily discussed. An alternative electromagnetic vibration technique has been worked out to improve the solid/solid separation in HGMS. The use of the special technique in the separation of the actual slimes shows that the vibration high gradient magnetic separation is very effective to treat some paramagnetie mineral slimes.The floatability, adsorption behavior and electro-kinetic phenonmenon of wolframite with the different ratio of Mn to Fe has been studied. The chemisorption of collector on wolframite surface is closely related to manganous ion. The wolframite of higher ratio of Mn to Fe has better floatability and stronger ability to adsorb collector. Activating action of manganous ion is stronger than. ferrous ion.Atpresent, four kinds of flowsheets are employed in the treatment of tungsten sl ??imes in China: (1) a combined flowsheet of "shaking table-centrifugal separator-belt sluice; (2) combined flowsheet of "centrifugal separator-flotation"; (3) combined flowsheet of "magnetic separation-flotation"; and (4) combined flowsheet of "centrifugal separation-flotation-magnetic separation". For the treatment of complex tin slimes the typical processes are: centrifugal separator (for roughing) belt sluice (for cleaning-slime) table (for scavenging)-flotation. Three products produced, tin concentrate, rich tin middlings and lean tin middlings are smelted separately by different metallurgycal processes, such as reverbertory smelting, sulphide fuming and chloridization to increase overall recoveries of tin and associated mineral values from complex tin slimes.The new flotation process for the recovery of zinc oxide without desliming has been developed and the following reagent system can be used: 1) sodium hexametaphosphate; 2) emulsion of octadeca-amine and sulphide-the mixture of these two reagents (1:50), conditioned prior to flotation.A mathematical model of a spiral classifier has been formulated based on the concept of d_(50c) and thereduced performance curve. The model enables the performance of aspiral classifier to be calculated with reasonable accuracy when operating and design variables are known or can be measured. At the same time, a new equation has found to determine the corrected performance curve.In addition, a machenistic model of autogenous grinding which is established in terms of the energy balance principle is introduced. It devided the breakage of autogenous grinding into three parts: self breeakage, medium breakage and obrasion breakage.On the base of model a simulator has been developed for studying and predicting.

本文从选前作业、选矿理论、选矿工艺和设备、浮选药剂、固-液分离、数学模型和计算机在选矿中的应用、综合利用及环境保护等方面,对1985年我国选矿科学技术的发展情况进行了介绍和评述。

The foundation mechanisms and influence factors of oil film in deformation zone were studied by calculations and experiments in cold rolling aluminum sheets. Results show the hydrodynamic mechanism depends mainly on rolling oil viscosity and rolling speed.If a higher rolling speed is not obtained, specially in rolling with a lower viscosity oil, the effective oil film is not built up in deformation zone. The mechanical entrapment is considered a primary mechanism in rolling with a lower viscosity at lower...

The foundation mechanisms and influence factors of oil film in deformation zone were studied by calculations and experiments in cold rolling aluminum sheets. Results show the hydrodynamic mechanism depends mainly on rolling oil viscosity and rolling speed.If a higher rolling speed is not obtained, specially in rolling with a lower viscosity oil, the effective oil film is not built up in deformation zone. The mechanical entrapment is considered a primary mechanism in rolling with a lower viscosity at lower rolling speed, and oiil film thickness is derermined not only by the surface roughness of rolls and sheets, but also by the entrapment parameter m, and 0.1

通过计算分析与轧制实验,探讨了铝材冷轧变形区油膜形成机理及影响因素。结果表明:流体动力学成膜机理主要依赖于润滑剂粘度和轧制速度,特别是润滑剂粘度较低时,轧制速度必须达到一定值,否则无法形成有效的油膜,而机械夹带作为低粘、低速条件下变形区主要成膜机理,其膜厚度依赖于轧辊与轧件表面粗糙度和夹带系数m,0.1

 
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