Joint-TEXT （J-TEXT） is a medium-sized tokamak constructed at Huazhong University of Science and technology. At present, the poloidal field power supply consists of three subsystem sets, namely Ohmic heating field po...
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Joint-TEXT （J-TEXT） is a medium-sized tokamak constructed at Huazhong University of Science and technology. At present, the poloidal field power supply consists of three subsystem sets, namely Ohmic heating field power supply, vertical field power supply, and horizontal field power supply. The structure and function of the poloidal field （PF） power supply as well as the updated control system of the power supply is described. The new scheme uses the realtime feedback control method for the poloidal field power supply. The experimental results show that the poloidal field energized by poloidal field power supply meets the J-TEXT operational requirement perfectly.
作者：
Ying LinZhikuan ChenTengling YeYanfeng DaiDongge MaZhun MaQinde LiuYu ChenInstitute of Materials Research and Engineering
3 Research Link Singapore 117602 Institute of Materials Research and Engineering 3 Research Link Singapore 117602 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Changchun 130022 Key Lab for Advanced Materials Department of Chemistry East China University of Science and Technology 130 Meilong Road Shanghai 200237 State Key Laboratory of Polymer Physics and Chemistry
Changchun Institute of Applied ChemistryChinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Changchun 130022 Key Lab for Advanced Materials Department of Chemistry East China University of Science and Technology 130 Meilong Road Shanghai 200237 Key Lab for Advanced Materials
Department of Chemistry East China University of Science and Technology 130 Meilong Road Shanghai 200237
The concept of Peer-to-Peer (P2P) has been in-troduced into mobile networks, which has led to the emer-gence of mobile P2P networks, and originated potential ap-plications in many fields. However, mobile P2P networks ...
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The concept of Peer-to-Peer (P2P) has been in-troduced into mobile networks, which has led to the emer-gence of mobile P2P networks, and originated potential ap-plications in many fields. However, mobile P2P networks are subject to the limitations of transmission range, and highly dynamic and unpredictable network topology, giving rise to many new challenges for efficient information retrieval. In this paper, we propose an automatic and economical hybrid information retrieval approach based on cooperative cache. In this method, the region covered by a mobile P2P network is partitioned into subregions, each of which is identified by a unique ID and known to all peers. All the subregions then constitute a mobile Kademlia (MKad) network. The pro-posed hybrid retrieval approach aims to utilize the flooding-based and Distributed Hash Table (DHT)-based schemes in MKad for indexing and searching according to the designed utility functions. To further facilitate information retrieval, we present an effective cache update method by considering all relevant factors. At the same time, the combination of two different methods for cache update is also introduced. One of them is pull based on time stamp including two different pulls: an on-demand pull and a periodical pull, and the other is a push strategy using update records. Furthermore, we provide detailed mathematical analysis on the cache hit ratio of our approach. Simulation experiments in NS-2 showed that the proposed approach is more accurate and efficient than the existing methods.
The effect of polyethylenimine (PEI) concentration on the morphology, wire density and size of ZnO nanowire arrays was systematically studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scan...
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The effect of polyethylenimine (PEI) concentration on the morphology, wire density and size of ZnO nanowire arrays was systematically studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM). The photovoltaic properties of ZnO nanowire array films were also investigated. It is demonstrated that, for a ZnO nanowire array film obtained from 7.3mmol·L-1 PEI, an energy conversion efficiency of about 0.66% was obtained, which is the highest for ZnO nanowire array films prepared with different PEI concentrations from 3.2mmol·L-1 to 9.3mmol·L-1.
Calcium alginate fibers were prepared by wet spinning of sodium alginate into a coagulating bath containing calcium *** thermal degradation and flame retardancy of calcium alginate fibers were investigated with therma...
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Calcium alginate fibers were prepared by wet spinning of sodium alginate into a coagulating bath containing calcium *** thermal degradation and flame retardancy of calcium alginate fibers were investigated with thermal gravimetry(TG),X-ray diffraction(XRD),limiting oxygen index(LOI) and cone calorimeter(CONE).The results show that calcium alginate fibers are inherently flame retardant with a LOI value of 34,and the heat release rate(HRR),total heat release(THR),CO and CO_2 concentrations during com...
Formulation and numerical evaluation of a novel four-node quadrilateral element with continuous nodal stress（Q4-CNS）are presented.Q4-CNS can be regarded as an improved hybrid FE-meshless four-node quadrilateral elem...
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Formulation and numerical evaluation of a novel four-node quadrilateral element with continuous nodal stress（Q4-CNS）are presented.Q4-CNS can be regarded as an improved hybrid FE-meshless four-node quadrilateral element（FE-LSPIM QUAD4）, which is a hybrid FE-meshless *** of Q4-CNS are continuous at nodes, so the continuous nodal stress can be obtained without any smoothing *** is found that,compared with the standard four-node quadrilateral element（QUAD4）,Q4- CNS can achieve significantly better accuracy and higher convergence *** is also found that Q4-CNS exhibits high tolerance to mesh ***,since derivatives of Q4-CNS shape functions are continuous at nodes,Q4-CNS is potentially useful for the problem of bending plate and shell models.
A novel polygonal finite element method （PFEM） based on partition of unity is proposed, termed the virtual node method （VNM）. To test the performance of the present method, numerical examples are given for solid m...
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A novel polygonal finite element method （PFEM） based on partition of unity is proposed, termed the virtual node method （VNM）. To test the performance of the present method, numerical examples are given for solid mechanics problems. With a polynomial form, the VNM achieves better results than those of traditional PFEMs, including the Wachspress method and the mean value method in standard patch tests. Compared with the standard triangular FEM, the VNM can achieve better accuracy. With the ability to construct shape functions on polygonal elements, the VNM provides greater flexibility in mesh generation. Therefore, several fracture problems are studied to demonstrate the potential implementation. With the advantage of the VNM, the convenient refinement and remeshing strategy are applied.
Properties of body-centered tetragonal β-Sn are highly anisotropic. The crystal orientation of the β-Sn has a marked effect on the stress state in the SnAgCu solder joints. A finite element analysis has been perform...
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Hydraulically damped rubber mount (HDM) is a kind of effective isolator in automotive powertrain. Fluid-structure interaction (FSI) between rubber parts and fluid flow in chambers in HDM is important to the vibration ...
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We experimentally demonstrate optical delay of a novel star-16QAM signal through a silicon microring resonator. Delay time of ~ 30ps is observed by comparing the eye diagram of the star-16QAM signal on-resonance with ...
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