This paper focuses on the Noether symmetries and the conserved quantities for both holonomic and nonholonomic systems based on a new non-conservative dynamical model introduced by E1-Nabulsi. First, the E1-Nabulsi dyn...This paper focuses on the Noether symmetries and the conserved quantities for both holonomic and nonholonomic systems based on a new non-conservative dynamical model introduced by E1-Nabulsi. First, the E1-Nabulsi dynamical model which is based on a fractional integral extended by periodic laws is introduced, and E1-Nabulsi-Hamilton＇s canoni- cal equations for non-conservative Hamilton system with holonomic or nonholonomic constraints are established. Second, the definitions and criteria of E1-Nabulsi-Noether symmetrical transformations and quasi-symmetrical transformations are presented in terms of the invariance of E1-Nabulsi-Hamilton action under the infinitesimal transformations of the group. Fi- nally, Noether＇s theorems for the non-conservative Hamilton system under the E1-Nabulsi dynamical system are established, which reveal the relationship between the Noether symmetry and the conserved quantity of the system.展开更多
In July, the government unveiled a draft for public opinion, proposing to amend the highway toll management regulation. The revised regulation aims to extend tolls on governmentfunded highways.
Recently the State Council decided to extend the period ofduty exemption for imports of equipment and raw materials by foreign-invested enterprises below US$30 million.In order to administrate import and export activi...Recently the State Council decided to extend the period ofduty exemption for imports of equipment and raw materials by foreign-invested enterprises below US$30 million.In order to administrate import and export activities in light ofinternational practice and apply a unified, fair and standardizedpolicy toward import duties, the State Council, on December28,1995, decided to reform and adjust the policies of import duties by fairly significant reduction of the overall import tariff leveland elimination of preferences of import-duty exemption for mostimport items, which was also applicable to imports of equipmentand raw materials by foreign-invested enterprises set up since April1st, 1996. At the same time, with a view to maintaining the policycontinuity and relative stability, those enterprises established before March 31, 1996 were allowed an extended duty-exemptionperiod of one to two years for importation of equipment and rawmaterials(referring to construction materials, etc.) if such importswere below the value of their total investments, and for展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.10972151 and 11272227)the Innovation Program for Postgraduate in Higher Education Institutions of Jiangsu Province,China(Grant No.CXLX11_0961)
文摘This paper focuses on the Noether symmetries and the conserved quantities for both holonomic and nonholonomic systems based on a new non-conservative dynamical model introduced by E1-Nabulsi. First, the E1-Nabulsi dynamical model which is based on a fractional integral extended by periodic laws is introduced, and E1-Nabulsi-Hamilton＇s canoni- cal equations for non-conservative Hamilton system with holonomic or nonholonomic constraints are established. Second, the definitions and criteria of E1-Nabulsi-Noether symmetrical transformations and quasi-symmetrical transformations are presented in terms of the invariance of E1-Nabulsi-Hamilton action under the infinitesimal transformations of the group. Fi- nally, Noether＇s theorems for the non-conservative Hamilton system under the E1-Nabulsi dynamical system are established, which reveal the relationship between the Noether symmetry and the conserved quantity of the system.
文摘In July, the government unveiled a draft for public opinion, proposing to amend the highway toll management regulation. The revised regulation aims to extend tolls on governmentfunded highways.
文摘Recently the State Council decided to extend the period ofduty exemption for imports of equipment and raw materials by foreign-invested enterprises below US$30 million.In order to administrate import and export activities in light ofinternational practice and apply a unified, fair and standardizedpolicy toward import duties, the State Council, on December28,1995, decided to reform and adjust the policies of import duties by fairly significant reduction of the overall import tariff leveland elimination of preferences of import-duty exemption for mostimport items, which was also applicable to imports of equipmentand raw materials by foreign-invested enterprises set up since April1st, 1996. At the same time, with a view to maintaining the policycontinuity and relative stability, those enterprises established before March 31, 1996 were allowed an extended duty-exemptionperiod of one to two years for importation of equipment and rawmaterials(referring to construction materials, etc.) if such importswere below the value of their total investments, and for
