A high-density, high-flux circulating fluidized bed （CFB） riser （100 mm in ID and 10.614 m in height） was ap- plied in a wide range of operating conditions （with solid fluxes up to 400 kg/m2s and superficial gas ...A high-density, high-flux circulating fluidized bed （CFB） riser （100 mm in ID and 10.614 m in height） was ap- plied in a wide range of operating conditions （with solid fluxes up to 400 kg/m2s and superficial gas velocities up to 12 m/s） to examine its radial non-uniformity dynamics. The solids holdup was determined through the use of a fiber-optic probe at 11 axial levels. The results indicated that under all operating conditions, the high superficial gas velocity and low solid flux- es maintained a low radial non-uniformity index （RNI）. The high-density/flux CFB riser had several unique characteristics, so that the peak of the radial solids holdup profile occurred at a position with r/R=0.8. The RNI and solids holdup at the cross-sectional position had a good logarithmic relationship at the low-density condition （with a mean solids holdup of 〈0.2）, and the RNI decreased when the mean solids holdup exceeded 0.2. Investigation of the dynamics of stratified injec- tion revealed that the feed ratio had an important effect on G, and on solids holdup distribution. A novel ＂〈＂ shaped axial solids holdup profile was found. Gs decreased sharply when the up-flow feed ratio exceeded 0.5, and RNI was lowest when the up-flow feed ratio was 1.展开更多
The evolution of the charge density distribution function is simulated for both the case of a uniformly charged sphere with zero initial conditions and for the case of a non-uniform charged sphere. For the case of a u...The evolution of the charge density distribution function is simulated for both the case of a uniformly charged sphere with zero initial conditions and for the case of a non-uniform charged sphere. For the case of a uniformly charged sphere the comparison of a numerical result and an exact analytical demonstrated the agreement between the results. The process of “scattering” of a charged system under the influence of its own electric field has been illustrated on the basis of both the particle-in-cell method and the solution of the Cauchy problem for vector functions of the electric field and vector velocity field of a charged medium.展开更多
目的观察疏血通注射液对高血压性脑出血的治疗效果。方法将84例高血压性脑出血患者随机分为试验组和对照组各42例,对照组予以常规治疗,试验组除常规治疗外,在入院第7天开始给予疏血通6 ml,1次/d静滴,共14 d,在入院第1天、第7天、第21天...目的观察疏血通注射液对高血压性脑出血的治疗效果。方法将84例高血压性脑出血患者随机分为试验组和对照组各42例,对照组予以常规治疗,试验组除常规治疗外,在入院第7天开始给予疏血通6 ml,1次/d静滴,共14 d,在入院第1天、第7天、第21天分别进行头颅CT,根据CT对血肿及血肿周围低密度区体积进行记录,同时采用美国国立卫生院神经功能缺损评分(Nationgnal Institutes of Health stroke scale,NIHSS)评价神经功能缺损程度,并评价疗效。结果试验组血肿周围水肿体积及血肿体积在第21天明显小于对照组,神经功能改善优于对照组,试验组临床有效率(69.0%)显著高于对照组(47.6%),试验组未见血肿扩大、再出血等严重不良反应。结论疏血通注射液治疗高血压性脑出血效果良好,且未见明显不良反应。展开更多
基金the financial support of the National Program on Key Basic Research Project (973 Program) of China (no. 2012CB215000)
文摘A high-density, high-flux circulating fluidized bed （CFB） riser （100 mm in ID and 10.614 m in height） was ap- plied in a wide range of operating conditions （with solid fluxes up to 400 kg/m2s and superficial gas velocities up to 12 m/s） to examine its radial non-uniformity dynamics. The solids holdup was determined through the use of a fiber-optic probe at 11 axial levels. The results indicated that under all operating conditions, the high superficial gas velocity and low solid flux- es maintained a low radial non-uniformity index （RNI）. The high-density/flux CFB riser had several unique characteristics, so that the peak of the radial solids holdup profile occurred at a position with r/R=0.8. The RNI and solids holdup at the cross-sectional position had a good logarithmic relationship at the low-density condition （with a mean solids holdup of 〈0.2）, and the RNI decreased when the mean solids holdup exceeded 0.2. Investigation of the dynamics of stratified injec- tion revealed that the feed ratio had an important effect on G, and on solids holdup distribution. A novel ＂〈＂ shaped axial solids holdup profile was found. Gs decreased sharply when the up-flow feed ratio exceeded 0.5, and RNI was lowest when the up-flow feed ratio was 1.
文摘The evolution of the charge density distribution function is simulated for both the case of a uniformly charged sphere with zero initial conditions and for the case of a non-uniform charged sphere. For the case of a uniformly charged sphere the comparison of a numerical result and an exact analytical demonstrated the agreement between the results. The process of “scattering” of a charged system under the influence of its own electric field has been illustrated on the basis of both the particle-in-cell method and the solution of the Cauchy problem for vector functions of the electric field and vector velocity field of a charged medium.
文摘目的观察疏血通注射液对高血压性脑出血的治疗效果。方法将84例高血压性脑出血患者随机分为试验组和对照组各42例,对照组予以常规治疗,试验组除常规治疗外,在入院第7天开始给予疏血通6 ml,1次/d静滴,共14 d,在入院第1天、第7天、第21天分别进行头颅CT,根据CT对血肿及血肿周围低密度区体积进行记录,同时采用美国国立卫生院神经功能缺损评分(Nationgnal Institutes of Health stroke scale,NIHSS)评价神经功能缺损程度,并评价疗效。结果试验组血肿周围水肿体积及血肿体积在第21天明显小于对照组,神经功能改善优于对照组,试验组临床有效率(69.0%)显著高于对照组(47.6%),试验组未见血肿扩大、再出血等严重不良反应。结论疏血通注射液治疗高血压性脑出血效果良好,且未见明显不良反应。
