目的:分析探讨男性患者感染HIV对其性激素代谢、T淋巴细胞亚群的影响以及性功能障碍的发生情况。方法:选取2014年5月至2016年1月凉山州第二人民医院收治的HIV感染男性患者79例作为感染组,选取同期来医院健康体检的男性45例作为正常对照...目的:分析探讨男性患者感染HIV对其性激素代谢、T淋巴细胞亚群的影响以及性功能障碍的发生情况。方法:选取2014年5月至2016年1月凉山州第二人民医院收治的HIV感染男性患者79例作为感染组,选取同期来医院健康体检的男性45例作为正常对照组。检测和比较两组成员性激素水平、T淋巴细胞亚群数量和百分比,以及通过国际勃起功能指数-5量表(International Index of Erectile Function,IIEF-5)判定两组成员性功能障碍发生情况。结果:(1)6项性激素水平测定中,HIV感染组患者睾酮(T)、孕酮(P)和泌乳素(PRL)浓度明显低于正常对照组患者,而人促黄体生成激素(LH)、雌激素(E_2)和人血清促卵泡生成激素(FSH)则显著高于正常对照组患者;(2)T淋巴细胞亚群测定结果比较,HIV感染组患者CD3+和CD4+T细胞数量和百分比较正常对照组患者皆明显下降,CD8+T细胞数量和百分比测定结果高于正常对照组患者;(3)男性HIV感染组患者出现性功能障碍比率明显高于正常对照组患者,其中以轻度勃起功能障碍(erectile dysfunction,ED)为主,共出现50例,占比63.29%。结论:男性感染HIV容易造成机体性腺功能减退,性激素代谢水平下降,T淋巴细胞亚群数量与比例失衡,同时也会造成性功能障碍。展开更多
为明确蜡晶析出对二氧化碳水合物的作用机理,揭示含蜡水包油(Oil in Water,O/W)体系下二氧化碳水合物浆液流动及堵塞特性,采用高压可视实验环路开展了含蜡O/W体系下的水合物浆液流动实验;考察了不同蜡含量下,体系温度、压力、压降、流...为明确蜡晶析出对二氧化碳水合物的作用机理,揭示含蜡水包油(Oil in Water,O/W)体系下二氧化碳水合物浆液流动及堵塞特性,采用高压可视实验环路开展了含蜡O/W体系下的水合物浆液流动实验;考察了不同蜡含量下,体系温度、压力、压降、流量和水合物生成体积分数等的变化趋势。结果表明:在含蜡质量分数为0.50%~1.75%时,O/W体系下蜡晶析出后与液相中的水合物颗粒形成大尺寸聚集体并沉积在管道下壁面,管道流通面积急剧减小,流动摩阻增大,体系流动性显著下降,最终出现堵塞;在含蜡质量分数为1.75%~2.50%时,O/W体系下蜡晶大量析出形成的蜡沉积层阻碍温控系统与环路间传热,水合物生成体积分数较小且生成的水合物多以悬浮相的形式随液相主体流动,体系最终形成稳定的浆液流动。展开更多
To further extend study on celestial attitude determination with strapdown star sensor from static into dynamic field, one prerequisite is to generate precise dynamic simulating star maps. First a neat analytical solu...To further extend study on celestial attitude determination with strapdown star sensor from static into dynamic field, one prerequisite is to generate precise dynamic simulating star maps. First a neat analytical solution of the smearing trajectory caused by spacecraft attitude maneuver is deduced successfully, whose parameters cover the geometric size of optics, three-axis angular velocities and CCD integral time. Then for the first time the mathematical law and method are discovered about how to synthesize the two formulae of smearing trajectory and the static Gaussian distribution function （GDF） model, the key of which is a line integral with regard to the static GDF attenuated by a factor 1/Ls （Ls is the arc length of the smearing trajectory） along the smearing trajectory. The dynamic smearing model is then obtained, also in an analytical form. After that, three sets of typical simulating maps and data are simulated from this dynamic model manifesting the expected smearing effects, also compatible with the linear model as its special case of no boresight rotation. Finally, model validity tests on a rate turntable are carried out, which results in a mean correlation coefficient 0.920 0 between the camera images and the corresponding model simulated ones with the same parameters. The sufficient similarity verifies the validity of the dynamic smearing model. This model, after pa- rameter calibration, can serve as a front-end loop of the ground semi-physical simulation system for celestial attitude determination with strapdown star sensor.展开更多
文摘目的:分析探讨男性患者感染HIV对其性激素代谢、T淋巴细胞亚群的影响以及性功能障碍的发生情况。方法:选取2014年5月至2016年1月凉山州第二人民医院收治的HIV感染男性患者79例作为感染组,选取同期来医院健康体检的男性45例作为正常对照组。检测和比较两组成员性激素水平、T淋巴细胞亚群数量和百分比,以及通过国际勃起功能指数-5量表(International Index of Erectile Function,IIEF-5)判定两组成员性功能障碍发生情况。结果:(1)6项性激素水平测定中,HIV感染组患者睾酮(T)、孕酮(P)和泌乳素(PRL)浓度明显低于正常对照组患者,而人促黄体生成激素(LH)、雌激素(E_2)和人血清促卵泡生成激素(FSH)则显著高于正常对照组患者;(2)T淋巴细胞亚群测定结果比较,HIV感染组患者CD3+和CD4+T细胞数量和百分比较正常对照组患者皆明显下降,CD8+T细胞数量和百分比测定结果高于正常对照组患者;(3)男性HIV感染组患者出现性功能障碍比率明显高于正常对照组患者,其中以轻度勃起功能障碍(erectile dysfunction,ED)为主,共出现50例,占比63.29%。结论:男性感染HIV容易造成机体性腺功能减退,性激素代谢水平下降,T淋巴细胞亚群数量与比例失衡,同时也会造成性功能障碍。
文摘为明确蜡晶析出对二氧化碳水合物的作用机理,揭示含蜡水包油(Oil in Water,O/W)体系下二氧化碳水合物浆液流动及堵塞特性,采用高压可视实验环路开展了含蜡O/W体系下的水合物浆液流动实验;考察了不同蜡含量下,体系温度、压力、压降、流量和水合物生成体积分数等的变化趋势。结果表明:在含蜡质量分数为0.50%~1.75%时,O/W体系下蜡晶析出后与液相中的水合物颗粒形成大尺寸聚集体并沉积在管道下壁面,管道流通面积急剧减小,流动摩阻增大,体系流动性显著下降,最终出现堵塞;在含蜡质量分数为1.75%~2.50%时,O/W体系下蜡晶大量析出形成的蜡沉积层阻碍温控系统与环路间传热,水合物生成体积分数较小且生成的水合物多以悬浮相的形式随液相主体流动,体系最终形成稳定的浆液流动。
文摘To further extend study on celestial attitude determination with strapdown star sensor from static into dynamic field, one prerequisite is to generate precise dynamic simulating star maps. First a neat analytical solution of the smearing trajectory caused by spacecraft attitude maneuver is deduced successfully, whose parameters cover the geometric size of optics, three-axis angular velocities and CCD integral time. Then for the first time the mathematical law and method are discovered about how to synthesize the two formulae of smearing trajectory and the static Gaussian distribution function （GDF） model, the key of which is a line integral with regard to the static GDF attenuated by a factor 1/Ls （Ls is the arc length of the smearing trajectory） along the smearing trajectory. The dynamic smearing model is then obtained, also in an analytical form. After that, three sets of typical simulating maps and data are simulated from this dynamic model manifesting the expected smearing effects, also compatible with the linear model as its special case of no boresight rotation. Finally, model validity tests on a rate turntable are carried out, which results in a mean correlation coefficient 0.920 0 between the camera images and the corresponding model simulated ones with the same parameters. The sufficient similarity verifies the validity of the dynamic smearing model. This model, after pa- rameter calibration, can serve as a front-end loop of the ground semi-physical simulation system for celestial attitude determination with strapdown star sensor.
