Model atmospheres of the close visual binary star Cou 1511(HIP 12552) are constructed using grids of Kuruz's blanketed models to build the individual synthetic spectral energy distributions(SEDs) for both componen...Model atmospheres of the close visual binary star Cou 1511(HIP 12552) are constructed using grids of Kuruz's blanketed models to build the individual synthetic spectral energy distributions(SEDs) for both components. These synthetic SEDs are combined together for the entire system and compared with the observational one following Al-Wardat's complex method for analyzing close visual binary stars. The entire observational SED of the system is used as a reference for comparison between the synthetic SED and the observed one. The parameters of both components are derived as:T_(eff)~a= 6180 ± 50 K,T_(eff)~b=5865 ± 70 K, log g_a = 4.35 ± 0.12, log g_b = 4.45 ± 0.14, R_a = 1.262 ± 0.08 R_⊙, R_b = 1.006 ± 0.07 R_⊙,L_a = 2.09 ± 0.10 L_⊙and L_b = 1.08 ± 0.12 L_⊙, with spectral types F8 V and G1.5V for components(a,b) respectively and age of 3.0 ± 0.9 Gyr. A modified orbit of the system is built and the masses of the two components are calculated as M_a = 1.17 ± 0.11 M_⊙and M_b = 1.06 ± 0.10 M_⊙.展开更多
The QCD one-loop renormalization is restudied in a mass-dependent subtraction scheme in which the quark mass is not set to vanish and the renormalization point is chosen to be an arbitrary time-like momentum. The corr...The QCD one-loop renormalization is restudied in a mass-dependent subtraction scheme in which the quark mass is not set to vanish and the renormalization point is chosen to be an arbitrary time-like momentum. The correctness of the subtraction is ensured by the Ward identities which are respected in all the processes of subtraction.By considering the mass effect, the effective coupling constant and the effective quark masses derived by solving the renormalization group equations are given in improved expressions which are different from the previous results.PACS numbers: 11.10.Gh, 11.10.Hi, 12.38.-t, 12.38.展开更多
In recent years, a series of pilot projects in mortgage of farmland contractual management right have been carried out in some regions. However, there is considerable dispute over whether the farmland contractual mana...In recent years, a series of pilot projects in mortgage of farmland contractual management right have been carried out in some regions. However, there is considerable dispute over whether the farmland contractual management right can be mortgaged in the practice of China's legislation on land circulation. We firstly introduced current situations of mortgage of farmland contractual management right in China. Then, we analyzed existing problems in mortgage of farmland contractual management right. Finally, we put forward corresponding countermeasures and recommendations, to bring into full play land use efficiency, more rationally distribute land resource, and further promote development of rural economy.展开更多
Since the Yellow Emperor’s Inner Canon(c.200 bce),Traditional Chinese Medicine(TCM)has held that the san jiao system is the largest anatomical structure in the human body,and that it consists of a network comprising ...Since the Yellow Emperor’s Inner Canon(c.200 bce),Traditional Chinese Medicine(TCM)has held that the san jiao system is the largest anatomical structure in the human body,and that it consists of a network comprising the large cavities in the body trunk and the small interstitial spaces between the tissues and cells throughout the body.More than 2000 years later,and according to recent scientific reports in America,this network of structures has been recognized by modern medicine.The two theories,TCM’s san jiao and its system of spaces(腠còu),and the recent scientific discovery of an interstitial network in the human body,are quite similar in structure,distribution and function.展开更多
The coupler is fundamental for a coupled model to realize complex interactions among component models.This paper focuses on the coupling process of Wave-Circulation(W-C) coupled model which consists of MASNUM(key labo...The coupler is fundamental for a coupled model to realize complex interactions among component models.This paper focuses on the coupling process of Wave-Circulation(W-C) coupled model which consists of MASNUM(key laboratory of marine science and numerical modeling wave model)and POM(Princeton Ocean Model).The current coupling module of this coupled model is based on the inefficient I/O file,which has already become a performance bottleneck especially when the coupled model utilizes a large number of processes.To improve the performance of the W-C model,a flexible coupling module based on the model coupling toolkit(MCT) is designed and implemented to replace the current I/O file coupling module in the coupled model.Empirical studies that we have carried out demonstrate that our online coupling module can dramatically improve the parallel performance of the coupled model.The online coupling module outperforms the I/O file coupling module.When processes increase to 96,the whole process of EXP-C takes only 695.8 seconds,which is only 58.8%of the execution time of EXP-F.Based on our experiments under 2D Parallel Decomposition(2DPD),we suggest setting parallel decomposition strategies automatically to component models in order to achieve high parallel efficiency.展开更多
Il existe des régions qui ont une forme triangulaire dans la région du cou.Ces triangles sont formés par des vaisseaux,des muscles ou des os.Ils sont importants en anatomie topographique et sont des par...Il existe des régions qui ont une forme triangulaire dans la région du cou.Ces triangles sont formés par des vaisseaux,des muscles ou des os.Ils sont importants en anatomie topographique et sont des parties essentielles dans le corps humain.Donc il est necessaire de bien apprendre les compositions de ces triangles et ses significations cliniques.En principe,les triangles du cou sont faits de 2 régions(divisés par le muscle sterno-cléido-mastodien).Tous ces triangles du cou sont très utiles en clinique.Quelques-uns sont les signes pour trouver les vaisseaux ou les nerfs en opération,soit sont les positions de paracentèse,soit sont pour observer l'évolution de maladie.Si on les matrise bien,on peut diminuer l'hémorragie en opration et découvrir des cancers ou maladies le plus tt possible ce qui est très important pour traitement.展开更多
We consider a Markov chain X = {Xi,i = 1,2,...} with the state space {0,1},and define W =∑i=1n XiXi+1,which is the number of 2-runs in X before time n + 1.In this paper,we prove that the negative binomial distributio...We consider a Markov chain X = {Xi,i = 1,2,...} with the state space {0,1},and define W =∑i=1n XiXi+1,which is the number of 2-runs in X before time n + 1.In this paper,we prove that the negative binomial distribution is an appropriate approximation for LW when VarW is greater than EW.The error estimate obtained herein improves the corresponding result in previous literatures.展开更多
In this paper, parallel library, portable extensible toolkit for scientific computation (PETSc), is used to solve linear systems in soil-water coupled finite element method (FEM) for geotechnical problems. The paralle...In this paper, parallel library, portable extensible toolkit for scientific computation (PETSc), is used to solve linear systems in soil-water coupled finite element method (FEM) for geotechnical problems. The parallel environment is integrated into GLEAVES, which is a geotechnical software package used for the finite element simulation. The linear system Ax = b which is a fundamental and the most time-consuming part of the FEM is solved with iterative solvers in PETSc. In order to find a robust and effective combination of iterative solvers and corresponding preconditioners for the soil-water coupled problems, performance evaluations on Krylov subspace methods and four preconditioners are carried out. The results indicate that general minimal residual (GMRES) method coupled with preconditioners can provide an effective solution. The application to a construction project is presented to illustrate the potential of the proposed solution.展开更多
文摘Model atmospheres of the close visual binary star Cou 1511(HIP 12552) are constructed using grids of Kuruz's blanketed models to build the individual synthetic spectral energy distributions(SEDs) for both components. These synthetic SEDs are combined together for the entire system and compared with the observational one following Al-Wardat's complex method for analyzing close visual binary stars. The entire observational SED of the system is used as a reference for comparison between the synthetic SED and the observed one. The parameters of both components are derived as:T_(eff)~a= 6180 ± 50 K,T_(eff)~b=5865 ± 70 K, log g_a = 4.35 ± 0.12, log g_b = 4.45 ± 0.14, R_a = 1.262 ± 0.08 R_⊙, R_b = 1.006 ± 0.07 R_⊙,L_a = 2.09 ± 0.10 L_⊙and L_b = 1.08 ± 0.12 L_⊙, with spectral types F8 V and G1.5V for components(a,b) respectively and age of 3.0 ± 0.9 Gyr. A modified orbit of the system is built and the masses of the two components are calculated as M_a = 1.17 ± 0.11 M_⊙and M_b = 1.06 ± 0.10 M_⊙.
文摘The QCD one-loop renormalization is restudied in a mass-dependent subtraction scheme in which the quark mass is not set to vanish and the renormalization point is chosen to be an arbitrary time-like momentum. The correctness of the subtraction is ensured by the Ward identities which are respected in all the processes of subtraction.By considering the mass effect, the effective coupling constant and the effective quark masses derived by solving the renormalization group equations are given in improved expressions which are different from the previous results.PACS numbers: 11.10.Gh, 11.10.Hi, 12.38.-t, 12.38.
基金Supported by Project of National Social Science Foundation(09CJY054 and 11BJY050)
文摘In recent years, a series of pilot projects in mortgage of farmland contractual management right have been carried out in some regions. However, there is considerable dispute over whether the farmland contractual management right can be mortgaged in the practice of China's legislation on land circulation. We firstly introduced current situations of mortgage of farmland contractual management right in China. Then, we analyzed existing problems in mortgage of farmland contractual management right. Finally, we put forward corresponding countermeasures and recommendations, to bring into full play land use efficiency, more rationally distribute land resource, and further promote development of rural economy.
文摘Since the Yellow Emperor’s Inner Canon(c.200 bce),Traditional Chinese Medicine(TCM)has held that the san jiao system is the largest anatomical structure in the human body,and that it consists of a network comprising the large cavities in the body trunk and the small interstitial spaces between the tissues and cells throughout the body.More than 2000 years later,and according to recent scientific reports in America,this network of structures has been recognized by modern medicine.The two theories,TCM’s san jiao and its system of spaces(腠còu),and the recent scientific discovery of an interstitial network in the human body,are quite similar in structure,distribution and function.
基金Supported by the National High Technology Research and Development Programme(No.2010AA012400,2010AA012302)the National Natural Science Foundation of China(No.61040048)
文摘The coupler is fundamental for a coupled model to realize complex interactions among component models.This paper focuses on the coupling process of Wave-Circulation(W-C) coupled model which consists of MASNUM(key laboratory of marine science and numerical modeling wave model)and POM(Princeton Ocean Model).The current coupling module of this coupled model is based on the inefficient I/O file,which has already become a performance bottleneck especially when the coupled model utilizes a large number of processes.To improve the performance of the W-C model,a flexible coupling module based on the model coupling toolkit(MCT) is designed and implemented to replace the current I/O file coupling module in the coupled model.Empirical studies that we have carried out demonstrate that our online coupling module can dramatically improve the parallel performance of the coupled model.The online coupling module outperforms the I/O file coupling module.When processes increase to 96,the whole process of EXP-C takes only 695.8 seconds,which is only 58.8%of the execution time of EXP-F.Based on our experiments under 2D Parallel Decomposition(2DPD),we suggest setting parallel decomposition strategies automatically to component models in order to achieve high parallel efficiency.
文摘Il existe des régions qui ont une forme triangulaire dans la région du cou.Ces triangles sont formés par des vaisseaux,des muscles ou des os.Ils sont importants en anatomie topographique et sont des parties essentielles dans le corps humain.Donc il est necessaire de bien apprendre les compositions de ces triangles et ses significations cliniques.En principe,les triangles du cou sont faits de 2 régions(divisés par le muscle sterno-cléido-mastodien).Tous ces triangles du cou sont très utiles en clinique.Quelques-uns sont les signes pour trouver les vaisseaux ou les nerfs en opération,soit sont les positions de paracentèse,soit sont pour observer l'évolution de maladie.Si on les matrise bien,on peut diminuer l'hémorragie en opration et découvrir des cancers ou maladies le plus tt possible ce qui est très important pour traitement.
基金Supported by National Natural Science Foundation of China(Grant No.11071021)
文摘We consider a Markov chain X = {Xi,i = 1,2,...} with the state space {0,1},and define W =∑i=1n XiXi+1,which is the number of 2-runs in X before time n + 1.In this paper,we prove that the negative binomial distribution is an appropriate approximation for LW when VarW is greater than EW.The error estimate obtained herein improves the corresponding result in previous literatures.
基金the National Natural Science Foundation of China(Nos.41172251 and 41002097)
文摘In this paper, parallel library, portable extensible toolkit for scientific computation (PETSc), is used to solve linear systems in soil-water coupled finite element method (FEM) for geotechnical problems. The parallel environment is integrated into GLEAVES, which is a geotechnical software package used for the finite element simulation. The linear system Ax = b which is a fundamental and the most time-consuming part of the FEM is solved with iterative solvers in PETSc. In order to find a robust and effective combination of iterative solvers and corresponding preconditioners for the soil-water coupled problems, performance evaluations on Krylov subspace methods and four preconditioners are carried out. The results indicate that general minimal residual (GMRES) method coupled with preconditioners can provide an effective solution. The application to a construction project is presented to illustrate the potential of the proposed solution.
