Steps of manipulation is required to complete the m od eling of the connection elements such as bolt, pin and the like in commerce CAD system. It leads to low efficiency, difficulty to assure the relative position, im...Steps of manipulation is required to complete the m od eling of the connection elements such as bolt, pin and the like in commerce CAD system. It leads to low efficiency, difficulty to assure the relative position, impossibility to express rules and knowledge. Based on the inner character analy sis of interpart, detail modification and assembly relation of mechanical connec ting element, the idea, which extends the feature modeling of part to the interp art feature modeling for assembly purpose, is presented, and virtual part based connecting element modeling is proposed. Virtual part is a complement set of lo cal modification of part to be connected. In assembly modeling, base part is mod ified by Boolean operation between base part and virtual part. The modeling and assembly is finished just in one operation, at the same time the rules and knowl edge of the connection elements are encapsulated through virtual part. According to this mechanism, a knowledge-based connecting elements rapid design module i s developed on commerce software package UG with satisfying results.展开更多
We study the Connes distance of quantum states of two-dimensional(2D)harmonic oscillators in phase space.Using the Hilbert–Schmidt operatorial formulation,we construct a boson Fock space and a quantum Hilbert space,a...We study the Connes distance of quantum states of two-dimensional(2D)harmonic oscillators in phase space.Using the Hilbert–Schmidt operatorial formulation,we construct a boson Fock space and a quantum Hilbert space,and obtain the Dirac operator and a spectral triple corresponding to a four-dimensional(4D)quantum phase space.Based on the ball condition,we obtain some constraint relations about the optimal elements.We construct the corresponding optimal elements and then derive the Connes distance between two arbitrary Fock states of 2D quantum harmonic oscillators.We prove that these two-dimensional distances satisfy the Pythagoras theorem.These results are significant for the study of geometric structures of noncommutative spaces,and it can also help us to study the physical properties of quantum systems in some kinds of noncommutative spaces.展开更多
Taking the case of vocational schools in Xuzhou City,we analyze the challenges and opportunities faced by the connotation construction of agriculture-related majors in vocational schools. And we discuss the focus of c...Taking the case of vocational schools in Xuzhou City,we analyze the challenges and opportunities faced by the connotation construction of agriculture-related majors in vocational schools. And we discuss the focus of connotation construction of agriculture-related majors,by establishing one theme,building two aspects,deepening three reforms and highlighting four tasks,aiming to make the connotation construction of agriculture-related majors get somewhere,and provide strong support for agricultural science and technology innovation. Finally we put forth measures for the connotation construction of agriculture-related majors.展开更多
The coexistence of myelolipoma within adrenal cortical adenoma is extremely rare,for both tumors present usually as separate entities.There are only 16 such cases reported worldwide.To the best of our knowledge,the ca...The coexistence of myelolipoma within adrenal cortical adenoma is extremely rare,for both tumors present usually as separate entities.There are only 16 such cases reported worldwide.To the best of our knowledge,the case we reported here is the first one of myxoid adrenal cortical adenoma associated with myelolipoma reported.A 32-year-old Chinese woman with 4-year history of hypertension was presented in our study.Computed tomography(CT)of the abdomen showed a large heterogene- ously-enhancing mass(4.5 cm in diameter)in the left suprarenal region.Clinical history and laboratory results suggest a metabolic disorder as Conn's syndrome.The patient underwent a left adrenalectomy,and a histopathological study confirmed the mass to be a myxoid adrenal cortical adenoma containing myelolipoma.The patient was postoperatively well and discharged uneventfully.In the present case report,we also discuss the etiology of simultaneous myelolipoma and adrenal adenoma associated with Conn's syndrome,and the methods of the diagnosis and differential diagnosis.展开更多
In this paper we give a proof of the Lefschetz fixed point formula of Freed for an orientation-reversing involution on an odd dimensional spin manifold by using the direct geometric method introduced by Lafferty et al...In this paper we give a proof of the Lefschetz fixed point formula of Freed for an orientation-reversing involution on an odd dimensional spin manifold by using the direct geometric method introduced by Lafferty et al. And then we generalize this formula under the noncommutative geometry framework.展开更多
A local Hankel transformation of order 1/2 is defined for every finite place of the field of rational numbers.Its inversion formula and the Plancherel type theorem are obtained.A Connes type trace formula is given for...A local Hankel transformation of order 1/2 is defined for every finite place of the field of rational numbers.Its inversion formula and the Plancherel type theorem are obtained.A Connes type trace formula is given for each local Hankel transformation of order 1/2.An S-local Connes type trace formula is derived for the S-local Hankel transformation of order 1/2.These formulas are generalizations of Connes' corresponding trace formulas in 1999.展开更多
文摘Steps of manipulation is required to complete the m od eling of the connection elements such as bolt, pin and the like in commerce CAD system. It leads to low efficiency, difficulty to assure the relative position, impossibility to express rules and knowledge. Based on the inner character analy sis of interpart, detail modification and assembly relation of mechanical connec ting element, the idea, which extends the feature modeling of part to the interp art feature modeling for assembly purpose, is presented, and virtual part based connecting element modeling is proposed. Virtual part is a complement set of lo cal modification of part to be connected. In assembly modeling, base part is mod ified by Boolean operation between base part and virtual part. The modeling and assembly is finished just in one operation, at the same time the rules and knowl edge of the connection elements are encapsulated through virtual part. According to this mechanism, a knowledge-based connecting elements rapid design module i s developed on commerce software package UG with satisfying results.
基金Project supported by the Key Research and Development Project of Guangdong Province,China(Grant No.2020B0303300001)the National Natural Science Foundation of China(Grant No.11911530750)+2 种基金the Guangdong Basic and Applied Basic Research Foundation,China(Grant No.2019A1515011703)the Fundamental Research Funds for the Central Universities,China(Grant No.2019MS109)the Natural Science Foundation of Anhui Province,China(Grant No.1908085MA16).
文摘We study the Connes distance of quantum states of two-dimensional(2D)harmonic oscillators in phase space.Using the Hilbert–Schmidt operatorial formulation,we construct a boson Fock space and a quantum Hilbert space,and obtain the Dirac operator and a spectral triple corresponding to a four-dimensional(4D)quantum phase space.Based on the ball condition,we obtain some constraint relations about the optimal elements.We construct the corresponding optimal elements and then derive the Connes distance between two arbitrary Fock states of 2D quantum harmonic oscillators.We prove that these two-dimensional distances satisfy the Pythagoras theorem.These results are significant for the study of geometric structures of noncommutative spaces,and it can also help us to study the physical properties of quantum systems in some kinds of noncommutative spaces.
基金Supported by Agricultural Vocational Education Reform and Development Research Project in Jiangsu Province (20110108)
文摘Taking the case of vocational schools in Xuzhou City,we analyze the challenges and opportunities faced by the connotation construction of agriculture-related majors in vocational schools. And we discuss the focus of connotation construction of agriculture-related majors,by establishing one theme,building two aspects,deepening three reforms and highlighting four tasks,aiming to make the connotation construction of agriculture-related majors get somewhere,and provide strong support for agricultural science and technology innovation. Finally we put forth measures for the connotation construction of agriculture-related majors.
文摘The coexistence of myelolipoma within adrenal cortical adenoma is extremely rare,for both tumors present usually as separate entities.There are only 16 such cases reported worldwide.To the best of our knowledge,the case we reported here is the first one of myxoid adrenal cortical adenoma associated with myelolipoma reported.A 32-year-old Chinese woman with 4-year history of hypertension was presented in our study.Computed tomography(CT)of the abdomen showed a large heterogene- ously-enhancing mass(4.5 cm in diameter)in the left suprarenal region.Clinical history and laboratory results suggest a metabolic disorder as Conn's syndrome.The patient underwent a left adrenalectomy,and a histopathological study confirmed the mass to be a myxoid adrenal cortical adenoma containing myelolipoma.The patient was postoperatively well and discharged uneventfully.In the present case report,we also discuss the etiology of simultaneous myelolipoma and adrenal adenoma associated with Conn's syndrome,and the methods of the diagnosis and differential diagnosis.
文摘In this paper we give a proof of the Lefschetz fixed point formula of Freed for an orientation-reversing involution on an odd dimensional spin manifold by using the direct geometric method introduced by Lafferty et al. And then we generalize this formula under the noncommutative geometry framework.
文摘A local Hankel transformation of order 1/2 is defined for every finite place of the field of rational numbers.Its inversion formula and the Plancherel type theorem are obtained.A Connes type trace formula is given for each local Hankel transformation of order 1/2.An S-local Connes type trace formula is derived for the S-local Hankel transformation of order 1/2.These formulas are generalizations of Connes' corresponding trace formulas in 1999.
