A simple way of interpolation for real time processing is pres -ented. For passive localization, the time delay between two signals can be determined by the peak of their cross-correlation. It is more efficient to est...A simple way of interpolation for real time processing is pres -ented. For passive localization, the time delay between two signals can be determined by the peak of their cross-correlation. It is more efficient to estimate a cross-correlation function by the inverse FFT of the cross-spectral density. The original smapling rate is usually very low to reduce computation. The sampling rate of the cross-correlation so computed is too low to estimate satisfactorily and an interpolation procedure is therefore needed. The interpolation by zero augmented spectrum is concise, fast and accurate. The results of the computer simulation and real nuderwater signal processing are given in the paper.展开更多
To develop highly efficient and useful software, we need to understand the essential feature of the welding phenomenon. From the mechanical point view, welding is a transient nonlinear problem in which small but stron...To develop highly efficient and useful software, we need to understand the essential feature of the welding phenomenon. From the mechanical point view, welding is a transient nonlinear problem in which small but strongly nonlinear region is moving with the welding torch. Noting this characteristic, ISM （Iterative Substructure Method） was developed for the thermal-elastic-plastic analysis of large scale structures. It is also known that the welding distortion and the residual stress are produced by inherent strain. The inherent strain is the sum of irreversible strains such as plastic strain due to welding thermal cycles or phase transformation and creep strain. In addition to the inherent strain, the mismatch produced by cutting error and fitting is also an important cause of the welding distortions and residual stresses. Based on this understanding, an elastic FEM introducing the inherent strain and mismatch is developed. The potential capabilities of these methods are demonstrated through some examples.展开更多
Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this pape...Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this paper mainly expounds the perception method for strategic information perception in the open source intelligence environment as well as the framework and basic process of information perception. This paper argues that in order to match the information perception result with the information depiction result,it conducts practical exploration for the results of information acquisition,perception,depiction and analysis. This paper introduces and develops a monitoring platform for information perception. The results show that the method proposed in this paper is feasible.展开更多
A type of hollow cylinder joints connected with H-shaped beams is proposed for spatial structures. Based on von Mises yield criterion and perfect elasto-plasticity model, a series of finite element models of the joint...A type of hollow cylinder joints connected with H-shaped beams is proposed for spatial structures. Based on von Mises yield criterion and perfect elasto-plasticity model, a series of finite element models of the joints is established, in which the effect of geometric nonlinearity is taken into account. Then mechanical behavior and load-carrying capacity of the joints were investigated, which were subjected to axial load, in- and out-plane bending moments, and their combinations. The results show that the ultimate loads of the joints are determined by the maximum displacement. Furthermore, the case of one joint connected with multiple beams was discussed. Experiments on a set of typical full-scale joints were conducted to understand the structural behavior and the failure mechanism of joint, and also to validate the finite element models. Finally, the practical calculation method was established through finite elements analysis (FEA) results and numerical fitting. The results show that the joints are more ductile and materially economical than welded hollow spherical joints, and the practical calculation method can provide a reference for direct design and the revision of relevant design codes.展开更多
Traditional Chinese medicine （TCM） has an ancient history and unique system, including theory, methodology, prescription, formulation and medicines. There are differences between TCM and chemical drugs. For TCM, the...Traditional Chinese medicine （TCM） has an ancient history and unique system, including theory, methodology, prescription, formulation and medicines. There are differences between TCM and chemical drugs. For TCM, the multiple components in vivo are possibly to be detected; the number of components is relatively restricted; they could represent the therapeutic effect of the parent recipe; the concentrations and pharmacokinetics （PK） could affected by the combination of traditional medicines in recipe; the effects of new bioactive compounds （metabolites） related with those of their recipe; and the PK can be affected by body state in TCM treatment significantly. Therefore, the difficulty and challenge are far greater in PK study of TCMs than the chemical drugs.展开更多
Chinese students＇ poor communicative ability in oral and written English is one of the main concerns in English teaching and learning in China. In the new syllabus of college English, the priority has shifted from re...Chinese students＇ poor communicative ability in oral and written English is one of the main concerns in English teaching and learning in China. In the new syllabus of college English, the priority has shifted from reading to speaking. This paper intends to explore an effective method to improve students＇ speaking and writing ability. In the light of the advantages of Scenario-based Learning, two reflective SBL models are introduced.展开更多
Legal practice comprises the normative activities of constructing and maintaining social order with the aim of achieving equity and justice. In terms of content, it can be divided into three categories： intellectual ...Legal practice comprises the normative activities of constructing and maintaining social order with the aim of achieving equity and justice. In terms of content, it can be divided into three categories： intellectual legal practice, normative legal practice, and applied legal practice. As an important factor supporting legal practice, legal theory has a complex interactive relationship with legal practice. The effect of legal theory on legal practice is realized through the intermediary, carrier and bridging functions of the rationality, wisdom and ideas of legal practice. Developing the concept of the ideal legal life is the inherent mission and method of legal practice thought.展开更多
文摘A simple way of interpolation for real time processing is pres -ented. For passive localization, the time delay between two signals can be determined by the peak of their cross-correlation. It is more efficient to estimate a cross-correlation function by the inverse FFT of the cross-spectral density. The original smapling rate is usually very low to reduce computation. The sampling rate of the cross-correlation so computed is too low to estimate satisfactorily and an interpolation procedure is therefore needed. The interpolation by zero augmented spectrum is concise, fast and accurate. The results of the computer simulation and real nuderwater signal processing are given in the paper.
文摘To develop highly efficient and useful software, we need to understand the essential feature of the welding phenomenon. From the mechanical point view, welding is a transient nonlinear problem in which small but strongly nonlinear region is moving with the welding torch. Noting this characteristic, ISM （Iterative Substructure Method） was developed for the thermal-elastic-plastic analysis of large scale structures. It is also known that the welding distortion and the residual stress are produced by inherent strain. The inherent strain is the sum of irreversible strains such as plastic strain due to welding thermal cycles or phase transformation and creep strain. In addition to the inherent strain, the mismatch produced by cutting error and fitting is also an important cause of the welding distortions and residual stresses. Based on this understanding, an elastic FEM introducing the inherent strain and mismatch is developed. The potential capabilities of these methods are demonstrated through some examples.
基金Supported by the National Social Science Fund Project(No.18BTQ054)
文摘Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this paper mainly expounds the perception method for strategic information perception in the open source intelligence environment as well as the framework and basic process of information perception. This paper argues that in order to match the information perception result with the information depiction result,it conducts practical exploration for the results of information acquisition,perception,depiction and analysis. This paper introduces and develops a monitoring platform for information perception. The results show that the method proposed in this paper is feasible.
基金Project supported by the National Natural Science Foundation of China (No. 51178414)the Science Foundation of Zhejiang Province (No. Y1110438), China
文摘A type of hollow cylinder joints connected with H-shaped beams is proposed for spatial structures. Based on von Mises yield criterion and perfect elasto-plasticity model, a series of finite element models of the joints is established, in which the effect of geometric nonlinearity is taken into account. Then mechanical behavior and load-carrying capacity of the joints were investigated, which were subjected to axial load, in- and out-plane bending moments, and their combinations. The results show that the ultimate loads of the joints are determined by the maximum displacement. Furthermore, the case of one joint connected with multiple beams was discussed. Experiments on a set of typical full-scale joints were conducted to understand the structural behavior and the failure mechanism of joint, and also to validate the finite element models. Finally, the practical calculation method was established through finite elements analysis (FEA) results and numerical fitting. The results show that the joints are more ductile and materially economical than welded hollow spherical joints, and the practical calculation method can provide a reference for direct design and the revision of relevant design codes.
文摘Traditional Chinese medicine （TCM） has an ancient history and unique system, including theory, methodology, prescription, formulation and medicines. There are differences between TCM and chemical drugs. For TCM, the multiple components in vivo are possibly to be detected; the number of components is relatively restricted; they could represent the therapeutic effect of the parent recipe; the concentrations and pharmacokinetics （PK） could affected by the combination of traditional medicines in recipe; the effects of new bioactive compounds （metabolites） related with those of their recipe; and the PK can be affected by body state in TCM treatment significantly. Therefore, the difficulty and challenge are far greater in PK study of TCMs than the chemical drugs.
文摘Chinese students＇ poor communicative ability in oral and written English is one of the main concerns in English teaching and learning in China. In the new syllabus of college English, the priority has shifted from reading to speaking. This paper intends to explore an effective method to improve students＇ speaking and writing ability. In the light of the advantages of Scenario-based Learning, two reflective SBL models are introduced.
基金financed by "The 211 Project Program""The 985 Project Program" of Jilin Universityby the Center of Cooperative Innovation for Judicial Civilization
文摘Legal practice comprises the normative activities of constructing and maintaining social order with the aim of achieving equity and justice. In terms of content, it can be divided into three categories： intellectual legal practice, normative legal practice, and applied legal practice. As an important factor supporting legal practice, legal theory has a complex interactive relationship with legal practice. The effect of legal theory on legal practice is realized through the intermediary, carrier and bridging functions of the rationality, wisdom and ideas of legal practice. Developing the concept of the ideal legal life is the inherent mission and method of legal practice thought.
