The optimum theory and methods were adopted to design the laser beam riding guidance anti tank missile's control system in the short run. Through building the mathematical model of system, selecting a proper meth...The optimum theory and methods were adopted to design the laser beam riding guidance anti tank missile's control system in the short run. Through building the mathematical model of system, selecting a proper method and taking advantage of computer's high speed calculation and logic traits, an optimal controller was designed. Simulation results showed that the designed control system has fair performance and it satisfies the tactical and technical requirements. The results also demonstrate that by the combination of the optimizing methods and the computer the control system could be designed as soon as possible.展开更多
This article investigates the influence of the property of VGO derived from the Kazakhstan- Russian mixed crude on the hydrocracking catalyst. The influence of reaction temperature, reaction pressure, space velocity a...This article investigates the influence of the property of VGO derived from the Kazakhstan- Russian mixed crude on the hydrocracking catalyst. The influence of reaction temperature, reaction pressure, space velocity and hydrogen/oil ratio on the distribution and quality of products was analyzed with the optimal process regime determined, when the VGO was hydrocracked in the presence of the FC-16 catalyst.展开更多
Objective: To investigate the therapy effect of valsartan on oxidative stress and the formation of atherosclerosis of rabbit. Methods: An atherosclerotic rabbit model was established by feeding high cholesterol diet s...Objective: To investigate the therapy effect of valsartan on oxidative stress and the formation of atherosclerosis of rabbit. Methods: An atherosclerotic rabbit model was established by feeding high cholesterol diet supplemented by bovine serum albumin injection bolus. The rabbits were randomly divided into the control, model, and valsartan treated group, six rabbits in each group. Blood samples were collected at the end of 8 weeks for examination of serum lipid levels and MDA levels; the aortas were harvested for histological morphometry analysis, vascular cell adhesion molecule-1 (VCAM-1) immunohistochemical analysis and in situ superoxide detection to reflect the activity of NAD(P)H oxidase. Results: Rabbits fed with high cholesterol diet showed higher serum lipids levels than those fed with normal diet(P<0.01). Treatment with valsartan (10 mg/kg per day) did not alter serum lipids levels. But the serum MDA level and ratio of lesion to intima area reduced significantly compared with model group(P<0.05). The expression of VCAM-1 decreased significantly in the valsartan treated group than in the model group (P<0.05).In addition, in situ superoxide detection also show the markedly reduction of superoxide as a result of valsartan treatment. Conclusion: These results indicate that the valsartan treatment can reduce the atherosclerotic progression, the mechanisms of which may include the inhibiting the NAD(P)H oxidase activity to produce superoxide and the downregulating the expression of redox sensitive genes in the downstream, such as VCAM-1.展开更多
文摘The optimum theory and methods were adopted to design the laser beam riding guidance anti tank missile's control system in the short run. Through building the mathematical model of system, selecting a proper method and taking advantage of computer's high speed calculation and logic traits, an optimal controller was designed. Simulation results showed that the designed control system has fair performance and it satisfies the tactical and technical requirements. The results also demonstrate that by the combination of the optimizing methods and the computer the control system could be designed as soon as possible.
文摘This article investigates the influence of the property of VGO derived from the Kazakhstan- Russian mixed crude on the hydrocracking catalyst. The influence of reaction temperature, reaction pressure, space velocity and hydrogen/oil ratio on the distribution and quality of products was analyzed with the optimal process regime determined, when the VGO was hydrocracked in the presence of the FC-16 catalyst.
文摘Objective: To investigate the therapy effect of valsartan on oxidative stress and the formation of atherosclerosis of rabbit. Methods: An atherosclerotic rabbit model was established by feeding high cholesterol diet supplemented by bovine serum albumin injection bolus. The rabbits were randomly divided into the control, model, and valsartan treated group, six rabbits in each group. Blood samples were collected at the end of 8 weeks for examination of serum lipid levels and MDA levels; the aortas were harvested for histological morphometry analysis, vascular cell adhesion molecule-1 (VCAM-1) immunohistochemical analysis and in situ superoxide detection to reflect the activity of NAD(P)H oxidase. Results: Rabbits fed with high cholesterol diet showed higher serum lipids levels than those fed with normal diet(P<0.01). Treatment with valsartan (10 mg/kg per day) did not alter serum lipids levels. But the serum MDA level and ratio of lesion to intima area reduced significantly compared with model group(P<0.05). The expression of VCAM-1 decreased significantly in the valsartan treated group than in the model group (P<0.05).In addition, in situ superoxide detection also show the markedly reduction of superoxide as a result of valsartan treatment. Conclusion: These results indicate that the valsartan treatment can reduce the atherosclerotic progression, the mechanisms of which may include the inhibiting the NAD(P)H oxidase activity to produce superoxide and the downregulating the expression of redox sensitive genes in the downstream, such as VCAM-1.
