This article introduces the microporous three-dimensional small-opening structure sintered by powder material, discusses the hydraulics characteristic of the narrow passage in the microporous material and the bubble chamber theory and expounds the general 1/3～1/7 empiric rule.

介紹了由粉末狀材料燒結(jié)而成的微孔管三維孔隙結(jié)構(gòu)爱情岛论坛首页无码免费，研究了PE燒結(jié)管三維孔隙之間的關(guān)系性爱小视频国产，并探討了微孔管介質(zhì)內(nèi)細(xì)孔道的水力學(xué)特性和泡室理論一级黄片观看，對(duì)通用的1／3～1／7經(jīng)驗(yàn)規(guī)則進(jìn)行了解釋www.jjzzjjzz。

Density Functional Theory in connection with accurate LCAO basis sets and norm-conserving pseudopotentials were used to study two issues which are (1) The Selective Functionalization of Single-Walled Carbon Nanotubes with Diazonium Radical and (2) The Molecular Dynamic Simulated IR Spectrum of Adsorbed C3H3 and I on the Ag(111) Surface.For the first, we investigated (1) NO2C6H4 direct addition (2) NO2C6H4N2 dissociative addition reaction on semiconductor (8,0), metallic (9,0)and(5,5) carbon nanotubes.

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The thermoelectric effect of CNT films has also been studied in this research. The study shows that the thermoelectric force is proportional to temperature difference. The Seebeck coefficience is -15μv/K~-60μv/K, which exhibits that CNT films are n-type.

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By manufacturing the two cylindrical resistor tubes in the liquid groove of the conducting electricity, the variable of the liquid-surface height is linear to the variable of the cylindrical resistor tube.

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The transfer matrix method is used to carry out the vibration characteristic analysis of the fluid-filled piping system. The transfer matrix of the axial, transversal and torsion vibration of the fluid-filled straight pipe element is presented. And the transfer matrix of the elbow is derived according to the discrete model of the inextensible theory of the curve pipe. The effect of the flexural factor on the elbow's transfer matrix is studied.

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Tubes and pipes of the foregoing cross-sections may be polished, coated, bent, threaded, drilled, waisted, expanded, cone-shaped or fitted with flanges, collars or rings.

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The enhance nient of the corrosion resistance laser dadoling of the CNTs/Ni60 coatings is due to that the reserved carbon nanotubes in the coatings segregate the corrosive medium and promote N-based alloy passivation, the formed phases of the carbide and the reserved carbon nanotubes homogenous distribution in the claddings resist die corrosion.

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Addressing the pipe-rolling process consisting of rotary piercing mill, full-floating mandrel mill and stretch reducing mill, it is pointed out that both the Crop End Control technique of the stretch reducing mill and the Front-Tail Sharpening process should be jointly employed.

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Researching believed that lysosome has not only digestive function but also traffic action.

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The process of sand absorption is:(1) the vibration head vibrates and losses the sand layer, and supply high pressure air into the sand absorption head;(2) the high pressure air generates negative pressure in the sand absorption pipe when it is discharged out from the sand absorption;(3) the sand absorption head and the vibration are shifted downwards and maintains the water flow straightly.

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