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Contrastive Consistency and Attentive Complementarity for Deep Multi-View Subspace Clustering

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Computers, Materials & Continua 2024年第4期79卷 143-160页

作者： jiao wang Bin Wu Hongying Zhang School of Information Engineering Southwest University of Science and TechnologyMianyang621010China

Deep multi-view subspace clustering (DMVSC) based on self-expression has attracted increasing attention dueto its outstanding performance and nonlinear application. However, most existing methods neglect that viewprivatemeaningless information or noise may interfere with the learning of self-expression, which may lead to thedegeneration of clustering performance. In this paper, we propose a novel framework of Contrastive Consistencyand Attentive Complementarity (CCAC) for DMVsSC. CCAC aligns all the self-expressions of multiple viewsand fuses them based on their discrimination, so that it can effectively explore consistent and complementaryinformation for achieving precise clustering. Specifically, the view-specific self-expression is learned by a selfexpressionlayer embedded into the auto-encoder network for each view. To guarantee consistency across views andreduce the effect of view-private information or noise, we align all the view-specific self-expressions by contrastivelearning. The aligned self-expressions are assigned adaptive weights by channel attention mechanism according totheir discrimination. Then they are fused by convolution kernel to obtain consensus self-expression withmaximumcomplementarity ofmultiple views. Extensive experimental results on four benchmark datasets and one large-scaledataset of the CCAC method outperformother state-of-the-artmethods, demonstrating its clustering effectiveness.

关键词： Deep multi-view subspace clustering contrastive learning adaptive fusion self-expression learning

Microstructure and mechanical properties of hot-rolled V-microalloyed Al-containing medium-Mn steel

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Journal of Iron and Steel Research International 2020年第5期27卷 537-548页

作者： Ming Lei Wei-jun Hui jiao-jiao wang Yong-jian Zhang Xiao-li Zhao School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

The microstructure and mechanical properties of a V-microalloyed Al-containing medium-Mn steel after hot rolling and intercritical annealing(IA)are *** tested steel exhibits a fne multiphase microstructure consisting of bimodal sizes of ferrite and retained austenite plus considerable amount of fne VC and/or M3C ***-chemical phase analysis shows that about 71.0%of the total V is in VC phase and more than 93%of VC particles is less than 5 *** calculated precipitation strengthening values of VC are^347 and^234 MPa for the specimens intercritically annealed at 625 and 750℃,*** excellent combination of strength and ductility as high as^50 GPa%and yield strength(YS)of 890 MPa was obtained at intercritical temperature(TIA)of 725℃,although it does not correspond to the maximum precipitation strengthening of VC ***,it is suggested that an optimization of TIA corresponding to both excellent combination of strength and ductility and high YS should be further explored through chemical composition and IA process optimization.

关键词： Medium-Mn steel Vanadium Intercritical annealing Microstructure Mechanical property

Centrifugal experimental study of suction bucket foundations under dynamic loading

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Acta Mechanica Sinica 2007年第6期23卷 689-698页

作者： Xiaobing Lu Yongren Wu Bintian jiao Shuyun wang Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

Centrifugal experiments were carried out to investigate the responses of suction bucket foundations under horizontal and vertical dynamic loading. It is shown that when the loading amplitude is over a critical value, the sand at the upper part around the bucket is softened or even liquefied. The excess pore pressure decreases from the upper part to the lower part of the sand layer in the vertical direction and decreases radially from the bucket＇s side wall in the horizontal direction. Large settlements of the bucket and the sand layer around the bucket are induced by dynamic loading. The dynamic responses of the bucket with smaller height （the same diameter） are heavier.

关键词： Centrifugal experiments Suction bucket. Dynamic loading. Saturated sand

Modeling oxidation damage of continuous fiber reinforced ceramic matrix composites

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Acta Mechanica Sinica 2011年第3期27卷 382-388页

作者： Cheng-Peng Yang Gui-Qiong jiao Bo wang Department of Engineering Mechanics Northwestern Polytechnical University 710129 Xi'an China

For fiber reinforced ceramic matrix composites（CMCs）,oxidation of the constituents is a very important damage type for high temperature applications. During the oxidizing process,the pyrolytic carbon interphase gradually recesses from the crack site in the axial direction of the fiber into the interior of the material. Carbon fiber usually presents notch-like or local neck-shrink oxidation phenomenon,causing strength degradation. But,the reason for SiC fiber degradation is the aw growth mechanism on its surface. A micromechanical model based on the above mechanisms was established to simulate the mechanical properties of CMCs after high temperature oxidation. The statistic and shearlag theory were applied and the calculation expressions for retained tensile modulus and strength were deduced,respectively. Meanwhile,the interphase recession and fiber strength degradation were considered. And then,the model was validated by application to a C/SiC composite.

关键词： CMCs- Oxidation- Interface- Mechanical properties - Micromechanical model

The corrosion of AA2037 aluminum alloy in alkaline aqueous solution studied using slow positron beam spectroscopy

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Nuclear Science and Techniques 2016年第2期27卷 6-13页

作者： jiao-jiao wang Zhe-Jie Zhu Wei Yang Yi-Chu Wu Tong-Guang Zhai Hubei Key Laboratory of Nuclear Solid Physics School of Physics and Technology Wuhan University Chemical and Materials Engineering Department University of Kentucky

Corrosion behavior of AA2037 T8 Al alloy in a1 M Na OH aqueous solution was investigated using slow positron beam, together with microscopy techniques and electrochemical tests. The alloy was homogenized at 510℃ for 2 h and 30 s, respectively, before final peak aging, so that one Sample A had more dispersoids than Sample B after homogenization. It was found that S parameter of the Doppler-broadened annihilation was significantly decreased near the surface in both samples in the alkaline solution. With increasing the dissolution time,Sample A showed a slower decrease rate than Sample B,which might imply that the preexistence of more dispersoids might hinder the corrosion process in Sample *** electron microscopy and atomic force microscopy observations found that the surfaces of both samples were uniformly thinned due to intense chemical dissolution by the attack of OH-. With increasing the dissolution time,Sample B was corroded more substantially and produced more and larger pits in a short dissolution time than Sample A. Furthermore, polarization curves showed that Sample A had a lower corrosion current and corrosion rate than Sample B, which revealed that the presence of the dispersoids was responsible for the better corrosion resistance in the alloy.

关键词：慢正电子束碱性水溶液腐蚀行为铝合金扫描电子显微镜光谱溶解时间电化学测试

Multi-branch query tree protocol for solving RFID tag collision problem

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 51-54页

作者： jiao Chuan-hai wang Ke-ren Laboratory 304 of Communications and Information Systems Electronic Engineering Institute Hefei 230037 China

The technology of anti-collision is a key point in radio frequency identification （RFID） system. To avoid data collision, there are two approaches： ALOHA based algorithm and binary tree （BT） based algorithm. However, these cannot solve the collision problem completely, especially when the tag quantity is big and the tag ID is long. In this article, we present a multi-branch query tree （MBQT） protocol based on balanced incomplete block design （BIBD） code, and use 16-bit vectors derived from the BIBD as query prefix symbols of RFID reader. Compared with the conventional anti-collision algorithm, the theoretic analysis and simulation show that the proposed protocol improves the identification efficiency.

关键词： RFID BIBD MBQT

Steady-state entanglement and heat current of two coupled qubits in two baths without rotating wave approximation

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Chinese Physics B 2019年第6期28卷 72-80页

作者： Mei-jiao wang Yun-Jie Xia College of Physics and Engineering Qufu Normal UniversityQufu 273165China Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Qufu Normal UniversityQufu 273165China

We study the steady-state entanglement and heat current of two coupled qubits, in which two qubits are connected with two independent heat baths(IHBs) or two common heat baths(CHBs). We construct the master equation in the eigenstate representation of two coupled qubits to describe the dynamics of the total system and derive the solutions in the steadystate with stronger coupling regime between two qubits than qubit–baths. We do not make the rotating wave approximation(RWA) for the qubit–qubit interaction, and so we are able to investigate the behaviors of the system in both the strong coupling regime and the weak coupling regime, respectively. In an equilibrium bath, we find that the entanglement decreases with the bath temperature and energy detuning increasing under the strong coupling regime. In the weak coupling regime,the entanglement increases with coupling strength increasing and decreases with the bath temperature and energy detuning increasing. In a nonequilibrium bath, the entanglement without RWA is useful for entanglement at lower *** also study the heat currents of the two coupled qubits and their variations with the energy detuning, coupling strength and low temperature. In the strong(weak) coupling regime, the heat current increases(decreases) with coupling strength increasing when the temperature of one bath is lower(higher) than the other, and the energy detuning leads to a positive(negative) effect when the temperature is low(high). In the weak coupling regime, the variation trend of heat current is opposite to that of coupling strength for the IHB case and the CHB case.

关键词： steady-state entanglement equilibrium and nonequilibrium baths heat current rotating wave approximation

OSL chronology reveals Late Pleistocene floods and their impact on landform evolution in the lower reaches of the Keriya River in the Taklimakan Desert

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Journal of Geographical Sciences 2023年第5期33卷 945-960页

作者： ZHANG Feng wang jiao MA Li Dilibaier TUERSUN College of Geography and Remote Sensing Sciences Xinjiang Key Laboratory of Oasis EcologyXinjiang UniversityUrumqi830046China

The impacts of climate change on the relationship between fluvial processes and dune landform evolution have been ***,the chronology data used to examine this relationship are *** Keriya River has a glacial origin in the Kunlun Mountains on the south margin of the Tarim *** river flows into the Taklimakan Desert,the second largest shifting-dune desert in the *** dry channels and shifting dunes in this area provide an ideal opportunity to investigate fluvial and aeolian landform evolution processes and their relationship with climate *** investigated this area during 2008-2011 and obtained 18 fluvial sediment samples from 16 sections for optically stimulated luminescence(OSL)*** results show that the ages ranged from 3.4-44.1 *** of the samples(13)were Holocene in age,around 11 ka,8-9 ka,5-6.5 ka,4.6 ka,and 3.4-3.7 ka and were distributed along ancient river channels around sites of Yuansha and *** samples close to the Hotan River(38-47 ka)fall within the Marine Isotope Stage 3(MIS3).Three samples(from one section)were located near ancient channels flowing towards the Yuansha Site and had ages of around 14.5 ka,i.e.,during the Last Glacial Maximum(LGM).The analyses of the sediment samples and OSL ages suggest that the Keriya River flooded in the Holocene,the LGM,and *** sediments provided the source material for the dunes,and fluvial processes affected the landform evolution in the lower Keriya *** results suggest that most of the dunes covered in fluvial sediments in the lower reaches and the area west of the Keriya River developed since the *** differs from the results of previous studies,which suggested that they developed since the Han(202BC-220AD)and Tang(618-907AD)*** OSL ages of the fluvial sediments are consistent with the reported deglaciation(after glacial advance)ages in the alpine mountains surrounding the Tarim *** suggests that climate fluctuations may h

关键词： Taklimakan Desert flood inundation dunes MIS3 LGM Holocene deglaciation

Smart heat isolator with hollow multishelled structures

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Green Energy & Environment 2023年第4期8卷 1154-1160页

作者： Kun wang Lekai Xu jiao wang Shaojun Zhang Yanlei wang Nailiang Yang Jiang Du Dan wang Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou UniversityZhengzhou450001China State Key Laboratory of Biochemical Engineering Key Laboratory of Science and Technology on Particle MaterialsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou450000China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049China Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

Safe, green and efficient industrial production has always been the pursuit of the chemical industry. Since thermal energy is the driving force for most of chemical reactions, an ideal reaction tank would have the capacity to automatically regulate heat conduction rate. In detail, this reaction tank should endow an ability that resists the heat loss when the reaction temperature is lower than the target, while accelerating the heat dissipation when the system is overheated. In this case, this smart reactor can not only minimize energy consumption but also reduce safety *** structures are known to reduce heat conductivity. Particularly, the hollow structure with multishells can provide more interfaces and thus further inhibit heat transmission, which would be more favorable for heat isolation. Step forward, by coupling HoMSs with temperature-sensitive polymer, a smart heat isolation material has been fabricated in this work. It performs as a good heat isolator at a relatively lower temperature. A heat insulation effect of 6.5℃ can be achieved for the TSPU/3S–TiO_(2)HoMSs with a thickness of 1 mm under the temperature field of 50℃.The thermal conductivity of composite material would be raised under overheating conditions. Furthermore, this composite displays an unusual two-stage phase transformation during heating. Benefiting from the unique multishelled structure, energy is found to be gradually guided into the hollow structure and stored inside. This localized heat accumulation enables the composite to be a potential coating material for intelligent thermal-regulator and site-defined micro-reactor.

关键词： Hollow multishelled structures Thermal insulation Smart material