http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Guohui Ren (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Guohui Qu,Yuanlin Meng,Guiyuan Ren 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4
In view of the improper injector--producer spacing and low producing degree of low-permeability reservoir, according to water flooding characteristics of low-permeability with invert 9-spot well pattern, areal sweeping efficiency formula was adopted to calculate the areal sweeping efficiency for reservoir area; multiple linear regression was used to fit the mathematic model of areal sweeping efficiency, which was then used to work out the critical injector producer spacing under different injection-production pressure difference. Meanwhile, effective drainage factor was also used to calculate critical injector producer spacing, whose credibility of fitting data more than 95%. The computed results can be used to adjust the injector producer spacing of poor reservoirs and improve production efficiency of thin and poor reservoirs. Comparison of the data that include differential pressure, permeability, threshold pressure gradient, reasonable injection-production well pattern and space. etc from one block, in which injection pressure is high and difficult injection, which adjust well pattern and space can alleviate injection-production problem, and also estimation all the factors except water-sensitivity. etc.
-
DISTURBANCE ATTENUATION FOR A CLASS OF DISCRETE-TIME SWITCHED SYSTEMS WITH EXPONENTIAL UNCERTAINTY
Li, Changlin,Long, Fei,Ren, Guohui Korean Mathematical Society 2011 대한수학회지 Vol.48 No.4
The disturbance attenuation problem for a class of discretetime switched linear systems with exponential uncertainties via switched state feedback and switched dynamic output feedback is investigated, respectively. By using Taylor series approximation and convex polytope technique, exponentially uncertain discrete-time switched linear system is transformed into an equivalent switched polytopic model with additive norm bounded uncertainty. For such equivalent switched model, one designs its switching strategy and associated state feedback controllers and dynamic output feedback controllers so that whole switched model is asymptotical stabilization with H-in nity disturbance attenuation base on switched Lyapunov function and LMI approach. Finally, two numerical examples are presented to illustrate our results.
-
DISTURBANCE ATTENUATION FOR A CLASS OF DISCRETE-TIME SWITCHED SYSTEMS WITH EXPONENTIAL UNCERTAINTY
Changlin Li,Fei Long,Guohui Ren 대한수학회 2011 대한수학회지 Vol.48 No.4
The disturbance attenuation problem for a class of discrete-time switched linear systems with exponential uncertainties via switched state feedback and switched dynamic output feedback is investigated, respectively. By using Taylor series approximation and convex polytope technique, exponentially uncertain discrete-time switched linear system is transformed into an equivalent switched polytopic model with additive norm bounded uncertainty. For such equivalent switched model, one designs its switching strategy and associated state feedback controllers and dynamic output feedback controllers so that whole switched model is asymptotical stabilization with H-infinity disturbance attenuation based on switched Lyapunov function and LMI approach. Finally, two numerical examples are presented to illustrate our results.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
