护肤类产品保湿效能评估方法的初步研究

采用ＣＯＲＮＥＲＭＥＴＥＲ ＣＭ８２０和ＴＥＷＡＭＥＴＥＲ ＴＭ２１０对使用护肤品前后皮肤角质层的水合作用和表皮的水分蒸发值进行测试,初步建立了护肤类产品保湿效能的评估方法。     

榆林气田水平井产能影响因素分析

榆林气田现有2口水平井,其中X_2井产能较低,开发效果不理想。在地质研究的基础上开展理论分析,选出适合榆林气田的水平井产量计算公式,结合试气结果、产能试井、生产动态、钻井工程等方面,最终得出影响X_2井产能的主要因素。     

冻结施工中分布式光纤测温系统的研究

针对地层冻结监测的应用环境,着重研究了分布式光纤温度传感器原理并设计了APD,建立一套适用于低温环境下的分布式光纤测温系统,以实现在冻结法施工中冻结温度壁的温度在线实时测量。为进一步设计适用于冻结法施工中的低温温度监测装置奠定坚实的基础,使得监测装置能更好地满足在低温条件下连续空间范围内的分布式实时温度监测,为冻结法施工的温度监测提供一种有效的手段。     

Experimental study of airflow characteristics of stratum ventilation in a multi‐occupant room with comparison to mixing ventilation and displacement ventilation

The motivation of this study is stimulated by a lack of knowledge about the difference of airflow characteristics between a novel air distribution method [i.e., stratum ventilation (SV)] and conventional air distribution methods [i.e., mixing ventilation (MV) and displacement ventilation (DV)]. Detailed air velocity and temperature measurements were conducted in the occupied zone of a classroom with dimensions of 8.8 m (L) × 6.1 m (W) × 2.4 m (H). Turbulence intensity and power spectrum of velocity fluctuation were calculated using the measured data. Thermal comfort and cooling efficiency were also compared. The results show that in the occupied zone, the airflow characteristics among MV, DV, and SV are different. The turbulent airflow fluctuation is enhanced in this classroom with multiple thermal manikins due to thermal buoyancy and airflow mixing effect. Thermal comfort evaluations indicate that in comparison with MV and DV, a higher supply air temperature should be adopted for SV to achieve general thermal comfort with low draft risk. Comparison of the mean air temperatures in the occupied zone reveals that SV is of highest cooling efficiency, followed by DV and then MV.     

5Cr21Mn9Ni4N钢中碳化物层状析出与晶界沉淀

用光学，扫描和透射电镜观察研究了Ｍ２３Ｃ６晶界“层状”析出和类珠光形成规律和组织特征。     

Effect of 2-hydroxyacids on guinea-pig footpad stratum corneum: mechanical properties and binding studies

The effect of aqueous solutions of 2-hydroxyacids of chain length C₃ to C₁₀ on the extensibility of undamaged and solvent-damaged guinea-pig footpad stratum corneum has been studied. The increase in extensibility of solvent-damaged corneum, caused by treatment with hydroxyacid, reached a maximum with 2-hydroxycaprylic acid (C₈); on undamaged corneum, 2-hydroxycaprylic acid was the only hydroxyacid studied to give a significant effect. The increase in corneum extensibility produced by 2-hydroxyacids decreases when the pH is raised from 3 to 4. This loss of effect correlates with the ionization of the hydroxyacid (p K ˜ 3.85).
The binding of radiolabelled 2-hydroxycaproic (C₆) and 2-hydroxycaprylic acids to stratum corneum has been studied. 2-Hydroxycaprylic acid binds much more strongly than 2-hydroxycaproic acid, the difference in the binding being consistent with the hydrophobic binding energy of two methylene groups. Raising the pH above 3.5 results in a large decrease in the binding of 2-hydroxycaprylic acid in line with the corresponding reduction in extensibility.
Treatment with 2-hydroxyacids results in a small increase in the water-binding capacity of solvent-damaged stratum corneum, but in a decrease in the water-binding capacity of undamaged stratum corneum. These data are discussed in terms of a possible mechanism for the plasticizing of stratum corneum.
Effet des 2-hydroxyacides sur la couche cornée du coussin des pattes de cobaye     

Experimental investigation of thermal and ventilation performances of stratum ventilation

Stratum ventilation has been proposed to cope for elevated indoor temperatures. Air speed, temperature and CO₂ concentration of a stratum ventilated office are investigated experimentally. The data obtained under well defined conditions and therefore can be used for validating numerical models. Thermal comfort conditions and ventilation efficiency are studied based on the experimental results of four experimental cases. Thermal comfort indices, i.e. PMV, PPD and PD are calculated from measured data. The values of these indices are found to satisfy the requirements of ISO 7730, CR 1752-1998 and ASHRAE 55-2010. In terms of thermal comfort, the two cases with supply air temperature of 21 °C are found to perform better compared with the two cases with supply air temperature of 19 °C. For all the cases, the ventilation effectiveness is close to 1.5. This ventilation method could therefore be expected to provide indoor air quality in an efficient way.     

高分辨率层序地层样式模拟方法探讨

介绍了一种地层沉积模拟方法 (一维 ) ,建立了基准面旋回内地层沉积的模式。分析了该方法存在的问题 ,提出了改进的措施。     

地面垂向形变量与地下动态变化关系研究

根据大庆油田南二区西部大地三维形变测量结果,研究地层压力变化引起地面垂向形变的规律,得出了地层压力与地层形变关系式。对指导油田开发及套管保护具有重要意义。     

断层带高压注浆工艺与技术

矿山巷道中的断层带岩石一般比较破碎 ,难以支护 ,而且常常与含水层导通 ,易发生涌水。注浆可起到既加固围岩又封堵涌水的双重作用 ,是保证顺利通过断层的有效方法。结合工程实际讨论了断层注浆的方案设计、工艺参数及有关技术问题。最后 ,介绍了施工中得到的一些经验和体会 ,供今后施工借鉴和参考。