比高

The results show that there is a linear correlation between magnetic susceptibility and density. Take 1.6 g/cm^3 as a boundary value, the magnetism of high density coal and low density coal was opposite. The diamagnetism property of low density coal weakens and the paramagnetism of high density coal enhances along with the size reduction of fine coal. The magnetic field intensity influences the magnetism of coal.

研究表明：比磁化率同密度间存在线性相关关系，以1.6 g/立方公分为界，高、低密度级煤分别呈顺磁性和逆磁性，且随煤粉粒度的减小，低密度级煤的逆磁性减弱，而高密度级煤的顺磁性增强；磁场强度对煤的磁性有一定影响。

This means that I can build better than a higher floor, then looked high a premium can be diluted.

这意味着，我可以建立更好的比更高的楼，然后看着高溢价可以稀释。

This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

本项研究以热力采油的主要机理为基础，充分考虑在粘性力、重力和毛管力作用下油水气三相流动，考虑温度对各种流体和固体介质物性的影响，考虑每一组分中汽液两相的相平衡，考虑热在地层中的传导、对流和辐射以及上下盖层的热损失，利用热力学第一定律、质量守恒定律和流体迁移定律，建立了正确可靠的注蒸汽数学模型；在对数学模型进行空间离散时，利用控制有限体积积分法，对以往的九点差分近似作了合理的改进，使其具有较高的差分近似精度：结果表明，该公式的近似精度要比以往文献中所给的九点差分近似精度高，可以认为，在油藏数值模拟中，如果遇到非均质情况，使用这种九点差分近似更合理。

A series of rational craft parameters to prepare nanosized titanium dioxide are confirmed through the craft experiments. The testings of nanosized powder produced show: its size distribution is even; purity is high; dispersiveness is good: the specific surface area is high; its activation is good, and content of rutile is more than 80%.

工艺性实验得到一组比较合理的生产纳米二氧化钛的工艺参数，对生产出的纳米二氧化钛粉体进行测试，发现其颗粒分布均匀、纯度高、分散性好、比表面积高、活性好，晶红石型含量为80%以上。

The high chrome cast-iron added a variety of drib and microscale elements was used to make the flat hammer in overpressure turbine crusher,which can improve the wearing resistance and synthesize mechanical property of the products greatly,and the life of the products is 4 times longer than the former high-manganese steel .

在高铬铸铁中加入多种少量和微量合金元素用以生产反击式破碎机板锤，可使产品耐磨性和综合力学性能得到很大程度的改善，使用寿命比原用高锰钢提高4倍以上。

It is found that organic nanotubes from keto-enol isomeric dibenzoylmethane with different diameters show unique size dependent properties according to our experimental and calculated results. With the diameters of the nanotubes decreasing, the enol isomers of DBM molecules increased, the intensity of the fluorescence emission enhanced.

制备了平面稠环分子苝的纳米管，发现纳米管的形成机制源于模板孔洞的高长径比及溶液在高表面能基体上的自发铺展过程，苝层层沉积从而形成纳米管，苝分子头对尾的聚集体是形成纳米管的主要成份。

So it is suitable for higher receiving point. T-shaped structure has a good reducing noise effect at the area lower than 2m behind the noise barrier. The insertion loss is between 1.7 and 2.4dB higher than that of the erective noise barrier.

在屏障后50m距离、高度20m的插入损失仍能达到3.4dB，比直立形高出3.2dB，适合用于防治高度较高的噪声敏感点噪声。

The results indicate:In normal temperature condition,the amount of ethene producted by the fruit which kept with...

结果表明：在常温条件下，以蚕茧作为保鲜剂的水果比其他条件下的乙烯累积量少，好果率高、果实硬度高、贮藏期长；低温有明显的保鲜效果。

Tantalum is an ideal material for hot cathode. It has a low electronic work function, high melting-point, low evaporativity, and good mechanical, high-temperature, chemical properties. Especially in a PCVD ambient for diamond film deposition, its surface is transformed into tantalum carbide which has a much higher melting-point, lower evaporativity and better properties of electron emission.

钽是一种理想的热阴极材料，它具有电子逸出功低、熔点高、蒸发率小、良好的机械性能、高温性能、化学稳定性等优异特点，尤其是在辉光放电PCVD制备金刚石膜的特殊气氛中形成的碳化钽表面层，具有比钽更高的熔点、更低的蒸发率和更好的热电子发射特性。

For satellite channel has higher BER than that of fabre optic, so a code scheme to reduce the cell loss probability for any services which require low CLP and two hybrid error control schemes to control data serivce errors are studied and analysed, their advantages and disadvantages、application environment are given.

由于卫星信道误码率比地面光纤信道要高一些，为满足用户要求，研究了对信元丢失概率要求高的一类业务还必须采取的一些额外的措施，这包括采用降低信元丢失概率的编码和采用差错控制。

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。