In order to improve the shift decision strategy for an off-road vehicle with automated manual transmission（AMT）,the generalized road resistance coefficient is defined based on the longitudinal dynamics analysis.Vehi...In order to improve the shift decision strategy for an off-road vehicle with automated manual transmission（AMT）,the generalized road resistance coefficient is defined based on the longitudinal dynamics analysis.Vehicle mass and generalized road resistance coefficient are estimated using the recursive least square（RLS）method with multiple forgetting factors.The improved shift schedule is designed based on the generalized road resistance coefficient under uphill road condition.The simulation and real vehicle test verify the effectiveness of improved shift strategy and the improvement of vehicle dynamic performance.展开更多
For a finite discrete topological space X with at least two elements,a nonempty setГ,and a map p■is a generalized shift.In this text for■is bijective}we study proximal relations of transformation semigroups(S,X^(Г...For a finite discrete topological space X with at least two elements,a nonempty setГ,and a map p■is a generalized shift.In this text for■is bijective}we study proximal relations of transformation semigroups(S,X^(Г))and(H,XX^(Г)).Regarding proximal relation we prove:■is infinite■.Moreover,for infinite T,both transformation semigroups(S,X^(Г)and(H,XX^(Г))are regionally proximal,i.e.,■is finite.展开更多
A necessary and sufficient condition for the generalized shift operator T=S-k-(a(1)((1)),a(2)((1)),...)x e(1)-...-(a(1)((j)),a(2)((j)),...)x e(j)(j greater than or equal to k)on l(1)to be power bounded is obtained.Mor...A necessary and sufficient condition for the generalized shift operator T=S-k-(a(1)((1)),a(2)((1)),...)x e(1)-...-(a(1)((j)),a(2)((j)),...)x e(j)(j greater than or equal to k)on l(1)to be power bounded is obtained.Moreover,this note points out that the power bounded operator T=S-(1,1,...)x c(1)can shift a basis of[e(j+1)-e(j)](j=1)(infinity),and this basis is not equivalent to{T(n)e(1)}(infinity)(n=0).展开更多
Generalized Space Shift Keying(GSSK)modulation is a low-complexity spatial nmltiplexing technique for nmltiple-antenna wireless systems.However,effective transmit antenna combinations have to be preselected,and there ...Generalized Space Shift Keying(GSSK)modulation is a low-complexity spatial nmltiplexing technique for nmltiple-antenna wireless systems.However,effective transmit antenna combinations have to be preselected,and there exist redundant antenna combinations which are not used in GSSK.In this paper,a novel adaptive mapping scheme for GSSK modulation,named as Adaptive Mapping Generalized Space Shift Keying(AMGSSK),is presented.Compared with GSSK,the antenna combinations are updated adaptively according to the Channel State Inforrmtion(CSI)in the proposed AMGSSK system,and the perfonrance of average Symbol Error Rate(SER)is reduced considerably.In the proposed scheme,two algorithrrs for selecting the optimum antenna combinations are described.The SER perfonmnce of AMGSSK is analyzed theoretically,and validated by Monte Carlo sinmlation.It is shown that the proposed AMGSSK scheme has good perfonmnce in SER and spectral efficiency.展开更多
The Handan Offspring Myopia Study(HOMS)is the first offspring eye study in a Chinese population.The study design is based on another representative study,Handan Eye Study.In this study,we found 1 diopter(D)of generati...The Handan Offspring Myopia Study(HOMS)is the first offspring eye study in a Chinese population.The study design is based on another representative study,Handan Eye Study.In this study,we found 1 diopter(D)of generational myopic shift,a weak protective effect of the outdoor activity on myopia,and a modest protective effect of the eye exercises of acupoints on myopia,among the rural children in the northern area.展开更多
Active Magnetic Bearing(AMB)levitates rotor by magnetic force without friction,and it can provide active control force to suppress vibration while rotating.Most of vibration suppressing methods need angular speed sens...Active Magnetic Bearing(AMB)levitates rotor by magnetic force without friction,and it can provide active control force to suppress vibration while rotating.Most of vibration suppressing methods need angular speed sensors to obtain rotating speed,but in many occasions,angular speed sensor is difficult to install or is difficult to guarantee reliability.This paper proposed a vibration suppressing strategy without angular speed sensor based on generalized integrator and frequency locked loop(GI-FLL)and phase shift generalized integrator(PSGI).GI-FLL and high-pass filter estimate frequency from control current,PSGI is applied to generate compensating signal.Firstly,model of AMB system expressed by transfer function is established and effect of centrifugal force is analyzed.Then,principle and process of vibration suppressing strategy is introduced.Influence of parameters are analyzed by root locus and bode diagram.Simulation results display the process of frequency estimation and performance of displacement.Experiments are carried on a test rig,results of simulations and experiments demonstrate the effectiveness of proposed vibration suppressing strategy.展开更多
In this paper, we establish sufficient conditions on weights which ensurethat high-order Riesz-Bessel transformations generated by the generalized shift operator actboundedly from one weighted L_p-space into another.
In this paper, we develop novel non-sine functions, named hybrid-P-ary generalized bridge functions, based on the copy and shift methods. The generating algorithm of hybrid-P-ary generalized bridge functions is introd...In this paper, we develop novel non-sine functions, named hybrid-P-ary generalized bridge functions, based on the copy and shift methods. The generating algorithm of hybrid-P-ary generalized bridge functions is introduced based on the hybrid-P-ary generalized Walsh function＇s copy algorithm. The main property, product property, is also discussed. This function may be viewed as the generalization of the theory of bridge functions. And a lot of non-sine orthogonal functions are the special subset of these novel functions, The hybrid-P-ary generalized bridge functions can be used to search many unknown non-sine functions by defining different parameters.展开更多
This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraint...This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. Both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZBDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.展开更多
基金Supported by the National High Technology Engineering Program(303002011421)
文摘In order to improve the shift decision strategy for an off-road vehicle with automated manual transmission（AMT）,the generalized road resistance coefficient is defined based on the longitudinal dynamics analysis.Vehicle mass and generalized road resistance coefficient are estimated using the recursive least square（RLS）method with multiple forgetting factors.The improved shift schedule is designed based on the generalized road resistance coefficient under uphill road condition.The simulation and real vehicle test verify the effectiveness of improved shift strategy and the improvement of vehicle dynamic performance.
文摘For a finite discrete topological space X with at least two elements,a nonempty setГ,and a map p■is a generalized shift.In this text for■is bijective}we study proximal relations of transformation semigroups(S,X^(Г))and(H,XX^(Г)).Regarding proximal relation we prove:■is infinite■.Moreover,for infinite T,both transformation semigroups(S,X^(Г)and(H,XX^(Г))are regionally proximal,i.e.,■is finite.
基金the Education Department Foundation of Henan province.
文摘A necessary and sufficient condition for the generalized shift operator T=S-k-(a(1)((1)),a(2)((1)),...)x e(1)-...-(a(1)((j)),a(2)((j)),...)x e(j)(j greater than or equal to k)on l(1)to be power bounded is obtained.Moreover,this note points out that the power bounded operator T=S-(1,1,...)x c(1)can shift a basis of[e(j+1)-e(j)](j=1)(infinity),and this basis is not equivalent to{T(n)e(1)}(infinity)(n=0).
基金supported partially by the National Key Basic Research Program of China under Grant No.2007CB310605the Science and Technology Development Fund of Tianjin Colleges and Universities under Grant No.20080708the Research Fund of Tianjin University of Technology and Education under Grants No.KJ09-012,No.KJ10-06
文摘Generalized Space Shift Keying(GSSK)modulation is a low-complexity spatial nmltiplexing technique for nmltiple-antenna wireless systems.However,effective transmit antenna combinations have to be preselected,and there exist redundant antenna combinations which are not used in GSSK.In this paper,a novel adaptive mapping scheme for GSSK modulation,named as Adaptive Mapping Generalized Space Shift Keying(AMGSSK),is presented.Compared with GSSK,the antenna combinations are updated adaptively according to the Channel State Inforrmtion(CSI)in the proposed AMGSSK system,and the perfonrance of average Symbol Error Rate(SER)is reduced considerably.In the proposed scheme,two algorithrrs for selecting the optimum antenna combinations are described.The SER perfonmnce of AMGSSK is analyzed theoretically,and validated by Monte Carlo sinmlation.It is shown that the proposed AMGSSK scheme has good perfonmnce in SER and spectral efficiency.
基金This study is funded by Wenzhou Medical University R&D Fund(No.QTJ13009)Zhejiang Province Health Innovation Talents Fund(No.2016025).
文摘The Handan Offspring Myopia Study(HOMS)is the first offspring eye study in a Chinese population.The study design is based on another representative study,Handan Eye Study.In this study,we found 1 diopter(D)of generational myopic shift,a weak protective effect of the outdoor activity on myopia,and a modest protective effect of the eye exercises of acupoints on myopia,among the rural children in the northern area.
基金the National Natural Science Foundation of China(NSFC)under Grant 51877091.
文摘Active Magnetic Bearing(AMB)levitates rotor by magnetic force without friction,and it can provide active control force to suppress vibration while rotating.Most of vibration suppressing methods need angular speed sensors to obtain rotating speed,but in many occasions,angular speed sensor is difficult to install or is difficult to guarantee reliability.This paper proposed a vibration suppressing strategy without angular speed sensor based on generalized integrator and frequency locked loop(GI-FLL)and phase shift generalized integrator(PSGI).GI-FLL and high-pass filter estimate frequency from control current,PSGI is applied to generate compensating signal.Firstly,model of AMB system expressed by transfer function is established and effect of centrifugal force is analyzed.Then,principle and process of vibration suppressing strategy is introduced.Influence of parameters are analyzed by root locus and bode diagram.Simulation results display the process of frequency estimation and performance of displacement.Experiments are carried on a test rig,results of simulations and experiments demonstrate the effectiveness of proposed vibration suppressing strategy.
文摘In this paper, we establish sufficient conditions on weights which ensurethat high-order Riesz-Bessel transformations generated by the generalized shift operator actboundedly from one weighted L_p-space into another.
基金This work was supported by the National Natural Science Foundation of China （Grant Nos. 69931050, 69972002 and 60372018）.
文摘In this paper, we develop novel non-sine functions, named hybrid-P-ary generalized bridge functions, based on the copy and shift methods. The generating algorithm of hybrid-P-ary generalized bridge functions is introduced based on the hybrid-P-ary generalized Walsh function＇s copy algorithm. The main property, product property, is also discussed. This function may be viewed as the generalization of the theory of bridge functions. And a lot of non-sine orthogonal functions are the special subset of these novel functions, The hybrid-P-ary generalized bridge functions can be used to search many unknown non-sine functions by defining different parameters.
文摘This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. Both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZBDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.
