查询词典 surface resistance

The analysis of the spectral properties of time series of land surface fluxes and the estimation of transfer resistance are the main content of this thesis.

本文从谱分析的角度研究陆面通量的时间序列的性质，并探讨利用红外成像观测叶片表面温度的方法估算传输过程中的阻力。

Furrowing opener is one of important components in seeding and fertilizing. They often work in the soil with high moisture content. Soil adhesion on the surface of furrow opener increase the drag resistance considerably, makes the opened furrow irregular and depth of furrow not uniform, influences the performance of seed and, sometimes, makes them stop working. All these phenomena will influence the seeding quality.

开沟器是播种机、施肥机上的重要部件，在含水量较大的土壤中工作时，土壤粘附在工作表面，改变了表面形状，导致牵引阻力增大，开出的沟形不整齐，使种子在沟中的深度不一致，影响播种质量，严重时使出苗率降低10%，甚至使其无法作业。

The hardness of HSS roll was over 66 HRC, the depth of hardened layer excesses 30 mm, the variation of hardness in the roll surface was smaller than 1.5 HRC, and the wear resistance of HSS roll was better than that of high chromium cast iron roll and high nickel chromium indefinite hilled cast iron roll, close to that of powder metallurgy hard alloy roll.

研制出的高速钢轧辊硬度超过66HRC，淬硬层深度超过30mm，辊面硬度差小于1.5HRC，耐磨性优于高铬铸铁和高镍铬无限冷硬铸铁轧辊，接近硬质合金轧辊。

The results showed that when retrogressed by electrical current heating at 200 ℃ the tensile strength in re-aged 7A04 alloy extrusion bar of 60 mm in diameter reached 620-640 MPa and a uniform elongation appeared from central part to surface layer of the sample while the fracture time in test of resistance to stress corrosion under a load stress of 375MPa in 3%NaCl+0.5%H2O2 corrosion solution was greater than 30 d.

结果表明，直径60 mm的7A04铝合金棒材在200℃电流直接加热回归后再时效，从心部到表层的拉伸强度为620-640 MPa，延伸率均匀一致；在3%NaCl+0.5%H2O2水溶液介质中和375 MPa应力下的应力腐蚀断裂时间大于30d，而辐射式加热回归的为575 MPa，延伸率从心部至表层表现极不均匀，应力腐蚀断裂时间只有19 d。

The results showed that when retrogressed by electrical current heating at 200℃the tensile strength in re-aged 7A04 alloy extrusion bar of 60 mm in diameter reached 620- 640 MPa and a uniform elongation appeared from central part to surface layer of the sample while the fracture time in test of resistance to stress corrosion under a load stress of 375MPa in 3%NaCl+0.5%H_2O_2 corrosion sol...

结果表明，直径60 mm的7A04铝合金棒材在200℃电流直接加热回归后再时效，从心部到表层的拉伸强度为620-640 MPa，延伸率均匀一致；在3%NaCl+0.5%H_2O_2水溶液介质中和375 MPa应力下的应力腐蚀断裂时间大于30 d，而辐射式加热回归的为575 MPa，延伸率从心部至表层表现极不均匀，应力腐蚀断裂时间只有19 d。

Objective : To measure the fracture resistance of teeth restored with surface sandblasted casting posts .

研究铸造桩表面喷砂处理对牙根抗折性能的影响。

Objective : To measure the fracture resistance of teeth restored with surface sandblasted casting posts .

目的：研究铸造桩表面喷砂处理对牙根抗折性能的影响。

At the same time, the planning action of the inclined paddles tends to lift the boat clear of the water, with the result that the hull skims the surface with a minimum of resistance.

在同一时间内，规划行动的倾向，往往paddles解除船民明确的水，致使船体skims表面具有最低的阻力。

Compared with the time, the impact of temperature factors on the layer thickness is greater. The surface hardness of 45 steel is greatly improved for the exist of FeB; the corrosion resistance of boronizing layer is excellent which can resist hydrochloric acid, sulfuric acid and sodium hydroxide.

相比而言，温度对渗硼层厚度的影响大于时间的影响；渗硼层中FeB相使表面硬度显著提高；渗硼层抗盐酸、硫酸、氢氧化钠腐蚀性优良。

Experiments and tests that the subject of study by the surface treatment of aluminum alloy materials is feasible, through this research projects in the successful solution of a combination of aluminum alloy plating, electroplating gold after the aluminum parts of its corrosion resistance, electrical conductivity and Brazing performance has been greatly increased.

实验和测试证明本课题所研究的铝合金材料的表面处理方法是可行的，通过本课题的研究，成功的解决了铝合金电镀结合力问题，经过电镀金后的铝合金零件其耐蚀性，导电性和钎焊性能也大大提高。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。