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In previous researches, the numerical simulations were mainly focused on the convective heat transfer in the fluid zone of the louvered fin geometry. Virtually, the heat conduction in the fins and the convective heat transfer of air are coupled each other.

国外有学者对百叶窗翅片内的流场和温度场进行了数值模拟,事实上,在百叶窗翅片上的传热过程中,翅片的导热和空气的对流换热是相互耦合的,而这在以前的研究中忽略了。

Because thermal insulation was in oxygen-riched condition of afterburner and charred layer was porous, oxygenous gas in mixture would penetrate into charred layer and chemical reaction would take place in whole charred layer, which intensified the ablation process.

通过对烧蚀后试件的详细分析,认为绝热层烧蚀过程中燃气流中的氧化性组分会渗入炭化层内部,在炭化层内的孔隙中与材料发生放热的化学反应,大量消耗碳,加剧了烧蚀的过程。

The non-structure grid is used for complex irregular boundary processing. An efficient algorithm PISO is used for the model and it can correct the bias of the mesh, so it can reduce iterative times. The flow pattern, energy dissipation ratio and velocity field are obtained.

根据不同的运行工况,利用计算流体力学软件FLUENT对无压隧洞洞内消能工的水流流态进行了二维简化数学模型的数值模拟,在求解过程中采用混合结构网格来处理复杂的边界形状;采用了效率较高PISO算法进行计算,在计算过程中进行了相邻校正和偏斜校正,减少了达到收敛所需的迭代次数。

Combination with the practice of domestic aluminium production industry, the 3—D current distribution, magnetic flux density, electro—magnetic force, melt flow velocity field of three diffrent cells, that is, 80KA Soderberg cell with vertical stub, 155KA prebake cell, 160KA prebake cell were computed and the related computer—simulated pictures were drawn by use of the softwares we made.

本文利用电流分布、磁场、电磁力场和流场的计算软件,结合我国生产实际计算了80KA上插自焙槽,155KA预焙槽,160KA预焙槽三种不同槽子的三维电流分布,槽内磁感应强度,熔体中电磁力场,熔体流速场,绘制了相应的计算机仿真图,为了增加计算软件的可靠性、用铁棒法测定了80KA上插自焙槽,155KA预焙槽的铝液流速,测定值与计算值符合较好。

To compare the growth characteristics of non-hematopoietic adult stem cells derived from rat fetal blood and rat bone marrow in vitro, and to study the differentiation of these stem cells into neuron-like cells in vitro,the fetal blood of pregnant rats and bone marrow of adult rats were sterilely collected; mononuclear cells were isolated by using standard Ficoll-hypague techniques and then cultured in DMEM/LG containing 10% fetal bovine serum.

为了比较大鼠胎血和骨髓中非造血成体干细胞(non-hematopoietic adult stem cells,NASC)体外培养过程中的生长特性及体外诱导两者向神经元样细胞分化的异同,在无菌条件下采集孕大鼠的胎血和成年大鼠的骨髓,用Ficoll-hypague分离液分离出单个核细胞后,种植于含10%胎牛血清的DMEM/LG培养液内。收获的NASC传代培养,用流式细胞仪检测细胞的免疫表型。

The number of elementsin this flow-resistor network can be determined by the tracheid length,radial diameter andtangential diameter of tracheid and the dimension of specimen.

根据Zimmermann有关实验结果以及气体在针叶材中流动的路径,气体在试件内的流动通道分成为不同的区域,气体将不会在这些区域之间流动,即各区域间的流阻不相连接;且这样的区域在三个纹理方向的管胞数目相同都等于管胞在试件纵向排列的数目。

When pH is litmusless, the purification efficiency is the largest. The unhomogeneity of liquid flow results in the uneven biofilm growth. The flow resistance after start-up is significantly larger than that before start-up, whichprovides a method to monitor the biofilm growth.3、The packed bed is simplified to a series of straight capillary tubes covered by the biofilm. The two-phase flow and mass transport, biochemical reaction kinetics, and the limitation of oxygen are taken account of in this model. The results of model are basically in agreement with the experimental data.

通过观察还发现,由于液体分布不均,生物膜在滴滤塔内生长分布不均,并且挂膜后,滴滤塔的孔隙率减小,两相流动阻力比空塔时的大,可采用流动阻力的变化作为判断挂膜成功与否判据。3、首次将多孔填料塔简化成多个竖直毛细管并行排列构成的填料,应用两相流理论,结合生化反应动力学,并考虑氧的限制,建立了一个生物膜滴滤塔降解废气的毛细管模型,其结果与实验数据吻合得较好。

The infrared radiation characteristics of unsymmetrically two dimensional nozzle are experimentally studied. UTDN is designed and manufactured by prolonging one broad side of a general two-dimensional nozzle AR8 and its aspect radio is 8. Temperature distribution on the axes and spectral IR intensity on the orientation of 0, 10, 30, 60 and 90° on three typical detective planes of the hot plume are measured on hot plume simulation platform of the turbo fan engine.

为了研究非对称二元喷管(Unsymmetrically two-dimensional nozzle, UTDN)的红外辐射特性,首先以宽高比为8的常规二元喷管(AR8)为基础,设计加工了UTDN,然后在涡扇发动机热喷流实验台上测量了UTDN轴线上的温度分布以及在后半球典型探测面内0, 10, 30, 60和90°方向上的红外光谱辐射强度,积分得到辐射强度的空间分布,并在相同的实验条件下,与AR8进行了比较。

The device consisted of an array of 6×6 cell culture chambers, a drug gradient generator and fluidic control valves. Micro-dam structures of the chambers were able to trap cells while loading and drug gradient network generated drug gradient of 6 different concentrations. Also we applied hydraulic valves to control the microfluid and simulate the microenvironment of cells.

本研究介绍了一种利用SU-8负性光刻胶模具和PDMS制作双层结构的微流控细胞阵列芯片的方法,该芯片通过C型的坝结构将进样细胞拦截在芯片的细胞培养的固定区域,键合双层PDMS构成阀控制层,阀网络的开关作用成功实现了芯片通道内微流体的操控,同时芯片设计了药物浓度梯度网络,产生6个不同浓度的药物刺激细胞。

The binding of bis-ANS bound to blue membrane at different temperature are only one binding sites. 4. The research results of fluorescence, absorption spectra and stopped flow method used to track the process of transition from acidifying purple membrane to blue membrane indicate that the transition of the characteristic absorption band of retinal(from 570 to 605 nm) and the maximum excitation wavelengths of bacteriorhodopsin(from 326 to 331 nm) occurres at a narrow concentration range of HCl(11.5-13.3 mmol/L). The transition process performs within 0 to 2s.

通过荧光光谱、吸收光谱和停流技术对酸化紫膜转变成蓝膜变化过程的跟踪研究表明,视黄醛特征峰的递变(570→605nm)以及蛋白质荧光最大发射波长的递变(326→331nm)都是在狭窄的HCl浓度范围(11.5-13.3mmol/L)内同步进行的,该转变过程在0-2s之内极快完成。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。