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1·The relationships between the theoretical density and porosity of the composites and the repetition cycle are discovered.

从理论上揭示了复合材料的浸渍-裂解周期与材料的理论密度和理论孔隙率之间的关系。

2·The technology of repressing and re-sintering in powder metallurgy had been used to fabricate a c Cu-C composite materials attaining above 95% of the theoretical density.

采用粉末冶金复压复烧技术制备出高密度的铜碳复合材料，对两种成分铜碳复合材料的显微组织、物理力学性能和耐磨性能进行了对比试验。

3·A case study on SLS of this Cu-based metal powder to fabricate a gear is carried out. 82% relative theoretical density and transverse dimension error of 1.9% are achieved.

最后给出了激光烧结上述金属粉末制造齿轮的加工实例，其致密度达理论密度的82%，而横向尺寸误差仅为1.9%。

4·With a careful theoretical analysis various physical parameters such as the gas density, temperature, and pressure, and the ultraviolet and ionizing radiation fluxes can be derived .

通过仔细的理论分析，可以推导出如气体密度、温度和压力等各种物理参量，以及紫外辐射和电离辐射的流量。

5·Finally, the theoretical hardness of high-density C3N4 polymorphs is predicted.

最后，预测了高密度C3N4异构体的理论硬度。

6·Stirling engines may hold theoretical promise as aircraft engines, if high power density and low cost can be achieved.

斯特林发动机可以举行理论承诺，飞机引擎，如果高功率密度和低成本是可以实现的。

7·The probability density distribution of peak sidelobe levels is studied by theoretical analysis and numerical simulation, and several approaches of suppression of sidelobe level degradation are given.

通过理论分析和数值模拟，计算了峰值旁瓣电平的概率密度分布，并给出了抑制旁瓣电平恶化的一些措施。

8·A theoretical model used in calculating the reverse current density is proposed by considering several current transport mechanisms.

通过对反向电流各种输运机制的分析，提出了一种计算反向电流密度的理论模型。

9·Methods:Dynamic CT scan was performed in 9 volunteers, measuring the CT value of the same plane of aortic arch and the theoretical threshold was obtained by the time density curve(TDC).

方法：9例志愿者行主动脉弓同层动态增强扫描，利用获得的主动脉弓时间-密度曲线（TDC），寻求触发技术的理论阈值。

10·Under some level of error, the theoretical sampling number should decrease as the average density of the mite increases.

在相同误差水平，理论抽样数随平均虫口密度的增加而减少。