Compared with conventional method of violet spectrum, determination of the content of sulfides in fluid catalytic cracking (FCC) gasoline by using the potentiometric titration of lead tetraacetate has some advantages ...Compared with conventional method of violet spectrum, determination of the content of sulfides in fluid catalytic cracking (FCC) gasoline by using the potentiometric titration of lead tetraacetate has some advantages such as clear potentiometric abrupt change at the stoichiometric point, stable potentiometric value, exact and credible results, and simple operation. The content of sulfides in FCC gasoline of Shenghua refinery is 0.136% by this method. The standard deviation about this method is less than 0.01% and the relative standard deviation is less than 2.42%.展开更多
This paper designs an intelligent evaluation approach using a Radial Basis Function （RBF） Artificial Neural Network. We based our approach on establishing a comprehensive advantage evaluating index system that offer...This paper designs an intelligent evaluation approach using a Radial Basis Function （RBF） Artificial Neural Network. We based our approach on establishing a comprehensive advantage evaluating index system that offers scientific substance for creating a development plan and the strategic management of high-tech industry and regional clusters of high-tech enterprises. Furnhermore, this paper selects some typical high-tech enterprises＇ data to make comprehensive training on the network system. Meanwhile, the paper chooses some enterprises as testing samples to test the method, the result of which proves that this method is truly effective. The research of this paper provides a comprehensive advantage evaluating and managing method for high-tech enterprise.展开更多
The method in which a source is set on the surface and electric potential is received in the borehole is called surface-borehole electric potential technique. Technique of surface-borehole electric potential was emplo...The method in which a source is set on the surface and electric potential is received in the borehole is called surface-borehole electric potential technique. Technique of surface-borehole electric potential was employed to study electric response of layered formation. The electric potential was obtained by solving Poisson equation with finite difference method. In the course of calculation, forward modeling wilth finite difference method was realized by adopting bandwidth non-zero storage technique and the incomplete Cholesky conjugate gradient method. The results show that method of surface-borehole can acquire anomalous electric potential corresponding tc geo-electric layers. In addition, application of appropriate mathematical operator can improve the resolution. Moreover, overburden low resistivity layers have severe influence on measuring results of surface-borehole electric potential. However, bottom low resistivity layers play a positive role in the measurement.展开更多
Analyzing and discussing advantages of3D laparoscopic surgery in postoperative recovery Method： Selecting patients were treated by 2D laparoscopic surgery or 3D laparoscopic,surgery in our hospital from January 2015...Analyzing and discussing advantages of3D laparoscopic surgery in postoperative recovery Method： Selecting patients were treated by 2D laparoscopic surgery or 3D laparoscopic,surgery in our hospital from January 2015 to January 2016 as research subjects. According to different methods, we separate patients into two groups, and each group is 150 patients. The one is test group （3D laparoscopic surgery）, and the other is control group（2D laparoscopic surgery）. Observing two groups for some factors, such as probability of surgical injury, post-operative exhaust time, catheterization time, time of drainage tube placement and hospital time. Result： The magnification of3D laparoscopy image is significantly better than 2D laparoscopy. Error damage fraction of test group（2. 00%） is lower than control group （28.00%）, which effectively reduces the probability of total surgical errors and provides more accurate operation. At the same time, exhaust time, catheterization time, time of drainage tube placement and hospital time of test group are significantly lower than the control group, statistically significant （p〈0.05）. Conclusion： 3D laparoscopic surgery has characterizations of easy operation, small window, fast recovery and small probability of complications occurrence. The HD vision is widen to improve the level of minimally invasive surgery and it is worthy of clinical application.展开更多
基金Project of State Key Laboratory of Heavy Oil Processing (No. E030407-2).
文摘Compared with conventional method of violet spectrum, determination of the content of sulfides in fluid catalytic cracking (FCC) gasoline by using the potentiometric titration of lead tetraacetate has some advantages such as clear potentiometric abrupt change at the stoichiometric point, stable potentiometric value, exact and credible results, and simple operation. The content of sulfides in FCC gasoline of Shenghua refinery is 0.136% by this method. The standard deviation about this method is less than 0.01% and the relative standard deviation is less than 2.42%.
文摘This paper designs an intelligent evaluation approach using a Radial Basis Function （RBF） Artificial Neural Network. We based our approach on establishing a comprehensive advantage evaluating index system that offers scientific substance for creating a development plan and the strategic management of high-tech industry and regional clusters of high-tech enterprises. Furnhermore, this paper selects some typical high-tech enterprises＇ data to make comprehensive training on the network system. Meanwhile, the paper chooses some enterprises as testing samples to test the method, the result of which proves that this method is truly effective. The research of this paper provides a comprehensive advantage evaluating and managing method for high-tech enterprise.
基金Project supported by Global Center of Excellence in Novel Carbon Resource Sciences,Kyushu University,Japan
文摘The method in which a source is set on the surface and electric potential is received in the borehole is called surface-borehole electric potential technique. Technique of surface-borehole electric potential was employed to study electric response of layered formation. The electric potential was obtained by solving Poisson equation with finite difference method. In the course of calculation, forward modeling wilth finite difference method was realized by adopting bandwidth non-zero storage technique and the incomplete Cholesky conjugate gradient method. The results show that method of surface-borehole can acquire anomalous electric potential corresponding tc geo-electric layers. In addition, application of appropriate mathematical operator can improve the resolution. Moreover, overburden low resistivity layers have severe influence on measuring results of surface-borehole electric potential. However, bottom low resistivity layers play a positive role in the measurement.
文摘Analyzing and discussing advantages of3D laparoscopic surgery in postoperative recovery Method： Selecting patients were treated by 2D laparoscopic surgery or 3D laparoscopic,surgery in our hospital from January 2015 to January 2016 as research subjects. According to different methods, we separate patients into two groups, and each group is 150 patients. The one is test group （3D laparoscopic surgery）, and the other is control group（2D laparoscopic surgery）. Observing two groups for some factors, such as probability of surgical injury, post-operative exhaust time, catheterization time, time of drainage tube placement and hospital time. Result： The magnification of3D laparoscopy image is significantly better than 2D laparoscopy. Error damage fraction of test group（2. 00%） is lower than control group （28.00%）, which effectively reduces the probability of total surgical errors and provides more accurate operation. At the same time, exhaust time, catheterization time, time of drainage tube placement and hospital time of test group are significantly lower than the control group, statistically significant （p〈0.05）. Conclusion： 3D laparoscopic surgery has characterizations of easy operation, small window, fast recovery and small probability of complications occurrence. The HD vision is widen to improve the level of minimally invasive surgery and it is worthy of clinical application.
