Ultralow frequency (ULF) pulsed-gradient magnetic field (with the maximum intensity of 0.6–2.0 T, gradient of 10–100 T · m-1 , pulse width of 20–200 ms and frequency of 0.16–1.34 Hz) treatment of mice can inh...Ultralow frequency (ULF) pulsed-gradient magnetic field (with the maximum intensity of 0.6–2.0 T, gradient of 10–100 T · m-1 , pulse width of 20–200 ms and frequency of 0.16–1.34 Hz) treatment of mice can inhibit murine malignant tumour growth and can induce apoptosis of cancer cell. The apoptotic cancer cell contracted, became rounder and divorced from adjacent cells; the heterochromatin condensed and coagulated together along the inner side of the nuclear membrane; the endoplasmic reticulums expanded and fused with the cellular membrane; many apoptotic bodies which were packed by the cellular membrane appeared and were devoured by some lymphocytes and plasma. By Lorentz force the magnetic field keeps the moving ions within bounds of Larmor radius. Thus, penetrating capability of the positive and negative ions through the cell membrane was affected, even the role on the cell membrane formed.展开更多
In this paper, we study the Lie symmetrical Hojman conserved quantity of a relativistic mechanical system under general infinitesimal transformations of groups in which the time parameter is variable. The determining ...In this paper, we study the Lie symmetrical Hojman conserved quantity of a relativistic mechanical system under general infinitesimal transformations of groups in which the time parameter is variable. The determining equation of Lie symmetry of the system is established. The theorem of the Lie symmetrical Hojman conserved quantity of the system is presented. The above results are generalization to Hojman's conclusions, in which the time parameter is not variable and the system is non-relativistic. An example is given to illustrate the application of the results in the last.展开更多
The high frequency hybrid technique based on an iterative Physical Optics(PC)) and the method of equivalent current (MEC) approach is developed for predicting rangeresolution of the Radar Cross Section (RCS) in the sp...The high frequency hybrid technique based on an iterative Physical Optics(PC)) and the method of equivalent current (MEC) approach is developed for predicting rangeresolution of the Radar Cross Section (RCS) in the spatial domain. We introduce the hybrid highfrequency method to simulate range resolution of the extremely large target in the near zone. Thispaper applies this method to simulate the range resolution of the two 1 m X 1 m plates and the ship.The study improves the speed of simulatingthe range resolution of the extremely large target and isprepared for the application of the extrapolation and interpolation in the spatial domain.展开更多
The Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are studied. The definition and criterion of the Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are given. The rel...The Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are studied. The definition and criterion of the Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are given. The relationship between them is found. The conserved quantities which the Mei symmetry and the Lie symmetry lead to are obtained.An example is given to illustrate the application of the result.展开更多
The electromagnetic (EM) scattering by rivets on the conducting plate isstudied for the first time by using electric field integral equation (EFIE) in conjunction with themoment method. The surfaces of the rivets and ...The electromagnetic (EM) scattering by rivets on the conducting plate isstudied for the first time by using electric field integral equation (EFIE) in conjunction with themoment method. The surfaces of the rivets and the plate are partitioned into triangular cells, thecurrent distribution on the patches is represented by sub-domain type basis function, the EFIE istranslated into matrix equation by the Galerkin method, then the current coefficient is obtained.The results show the properties of radar cross section (RCS) varying with the incident angle whenthere are rivets on the plate.展开更多
基金the National Natural Science Foundation of China(39870823)and the Ministry of Science and Technology of China
文摘Ultralow frequency (ULF) pulsed-gradient magnetic field (with the maximum intensity of 0.6–2.0 T, gradient of 10–100 T · m-1 , pulse width of 20–200 ms and frequency of 0.16–1.34 Hz) treatment of mice can inhibit murine malignant tumour growth and can induce apoptosis of cancer cell. The apoptotic cancer cell contracted, became rounder and divorced from adjacent cells; the heterochromatin condensed and coagulated together along the inner side of the nuclear membrane; the endoplasmic reticulums expanded and fused with the cellular membrane; many apoptotic bodies which were packed by the cellular membrane appeared and were devoured by some lymphocytes and plasma. By Lorentz force the magnetic field keeps the moving ions within bounds of Larmor radius. Thus, penetrating capability of the positive and negative ions through the cell membrane was affected, even the role on the cell membrane formed.
文摘In this paper, we study the Lie symmetrical Hojman conserved quantity of a relativistic mechanical system under general infinitesimal transformations of groups in which the time parameter is variable. The determining equation of Lie symmetry of the system is established. The theorem of the Lie symmetrical Hojman conserved quantity of the system is presented. The above results are generalization to Hojman's conclusions, in which the time parameter is not variable and the system is non-relativistic. An example is given to illustrate the application of the results in the last.
基金Supported by the National Natural Science Foundation of China(60301007)
文摘The high frequency hybrid technique based on an iterative Physical Optics(PC)) and the method of equivalent current (MEC) approach is developed for predicting rangeresolution of the Radar Cross Section (RCS) in the spatial domain. We introduce the hybrid highfrequency method to simulate range resolution of the extremely large target in the near zone. Thispaper applies this method to simulate the range resolution of the two 1 m X 1 m plates and the ship.The study improves the speed of simulatingthe range resolution of the extremely large target and isprepared for the application of the extrapolation and interpolation in the spatial domain.
文摘The Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are studied. The definition and criterion of the Mei symmetry and the Lie symmetry of the relativistic Hamiltonian system are given. The relationship between them is found. The conserved quantities which the Mei symmetry and the Lie symmetry lead to are obtained.An example is given to illustrate the application of the result.
文摘The electromagnetic (EM) scattering by rivets on the conducting plate isstudied for the first time by using electric field integral equation (EFIE) in conjunction with themoment method. The surfaces of the rivets and the plate are partitioned into triangular cells, thecurrent distribution on the patches is represented by sub-domain type basis function, the EFIE istranslated into matrix equation by the Galerkin method, then the current coefficient is obtained.The results show the properties of radar cross section (RCS) varying with the incident angle whenthere are rivets on the plate.
