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PG-CODE:Latent Dirichlet Allocation Embedded Policy Knowledge Graph for Government Department Coordination

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Tsinghua Science and Technology 2022年第4期27卷 680-691页

作者： Yilin Kang Renwei ou Yi Zhang Hongling Li Shasha tian School of Computer Science South-Central University for NationalitiesWuhan 430074China School of Public Management SouthCentral University for NationalitiesWuhan 430074China

Government policy-group integration and policy-chain inference are significant to the execution of strategies in current Chinese ***,the coordination of hierarchical policies implemented among government departments is one of the key challenges to rural *** recent years,various well-established quantitative methods have been proposed to evaluate policy coordination,but the majority of these relied on manual analysis,which can lead to subjective ***,in this paper,a novel approach called“policy knowledge graph for the coordination among the government departments”(PG-CODE)is proposed,which incorporates topic modeling into policy knowledge *** to a knowledge graph,a policy knowledge graph uses a graph-structured data model to integrate policy *** latent Dirichlet allocation embedding,a policy knowledge graph could capture the underlying topics of the ***,coordination strength and topic diffusion among hierarchical departments could be inferred from the PG-CODE,as it can provide a better representation of coordination within the policy *** implemented and evaluated the PG-CODE in the field of rural innovation and entrepreneurship policy,and the results effectively demonstrate improved coordination among departments.

关键词： policy knowledge graph department coordination topic diffusion latent dirichlet allocation rural revitalization

Algebraic Approach to the Study of Quantum Integrability

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Chinese Physics Letters 1999年第1期16卷 6-8页

作者： XU Gong-ou YANG Ya-tian Department of Physics Nanjing UniversityNanjing 210093 Department of Physics Fujian Normal UniversityFuzhou 350007

The basic problem of quantum integrability has been systematically studied with an algebraic *** the introduction of the dynamical symmetry algebra the difficulty in transferring the classical integrability condition into quantum mechanics is *** the superconvergent technique of Kolmogorov,it has been proved that systems with Hamiltonians expressed merely with elements of a definite dynamical symmetry algebra form an integrable class of systems corresponding to that dynamical symmetry.

关键词： dynamical algebra symmetry

Effect of Solution Annealing on Microstructure and Mechanical Properties of a Ni-Cr-W-Fe Alloy

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Journal of Materials Science & Technology 2017年第11期33卷 1300-1307页

作者： Meiqiong ou Yingche Ma Xianchao Hao Baifang Wan tian Liang Kui Liu Institute of Metal Research ChineseAcademy of Sciences Shenyang 110016 China School of Materials Science and Engineeringl University of Science and Technology of China Hefei 230026 China Jiangsu Toland Alloy Co. Ltd. Danyang 212352 China

The effect of solution annealing on the microstructure and mechanical properties of a Ni-Cr-W-Fe alloy developed for advanced 700？C ultra-supercritical power plants was investigated. Test samples in this study were subjected to different solution treatments and the same aging treatment（at 760？C for 1 h）.When solution annealing temperature was elevated from 1020？C to 1150？C, the stress-rupture life at750？C/320 MPa was increased from 60 h to 300 h, the stress-rupture elongation was enhanced from12% to 17%, and the elongation of the tensile at 750？C was improved from 11% to 24%. All tensile and stress-rupture samples displayed an intergranular dimple mixed fracture. Intergranular micro-cracks had a great relationship with the morphology of grain boundary carbides. Most carbides retained the morphology of globular shape and continuous thin plate. After tensile and stress-rupture tests, a few carbides were converted into lamellar. The results showed that intergranular micro-cracks were easier to form at continuous thin plate carbides than at globular shape carbides. Lamellar carbides hardly caused the nucleation of micro-cracks. Besides, grain boundaries sliding and elements diffusion during stressrupture tests led to the formation of precipitate free zones, which accelerated the extension of microcracks and influenced the stress-rupture life.

关键词： Ni-Cr-W-Fe alloy Solution annealing Grain boundaries carbides Precipitate free zones Mechanical properties

Robust Watermarking of Mobile Video Resistant against Barrel Distortion

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China Communications 2016年第9期13卷 131-138页

作者： Huawei tian Yanhui Xiao Gang Cao Jianwei Ding Bo ou People's Public Security University of China Beijing100038China School of Computer Science Communication University of ChinaBeijing100024China College of Computer Science and Electronic Engineering Hunan UniversityChangsha410082China

In head mounted display(HMD),in order to cancel pincushion distortion,the images displayed on the mobile should be prewarped with barrel *** copyright of the mobile video should be verified on both the original view and the pre-warped virtual view.A robust watermarking resistant against barrel distortion for HMDs is proposed in this *** mask is embedded into image in consideration of imperceptibility and robustness of *** order to detect watermark from the pre-warped image with barrel distortion,an estimation method of the barrel distortion is proposed for ***,the same warp is enforced on the embedded watermark mask with the estimated parameters of barrel *** correlation between the warped watermark and the pre-warped image is computed to predicate the existence of *** shown in experimental results,watermark of mobile video can be detected not only from the original views,but also from the pre-warped virtual *** also shows that the proposed scheme is resistant against combined barrel distortion and common post-processing,such as JPEG compression.

关键词： mobile video HMD with mobile robust watermarking

Objectness Region Enhancement Networks for Scene Parsing

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Journal of Computer Science & Technology 2017年第4期32卷 683-700页

作者： Xin-Yu ou Ping Li He-Fei Ling Si Liu tian-Jiang Wang School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Institute of Information Engineering Chinese Academy of Sciences Beijing 100091 China Cadres Online Learning Institute of Yunnan Province Yunnan Open University Kunming 650223 China

Semantic segmentation has recently witnessed rapid progress, but existing methods only focus on identifying objects or instances. In this work, we aim to address the task of semantic understanding of scenes with deep learning. Different from many existing methods, our method focuses on putting forward some techniques to improve the existing algorithms, rather than to propose a whole new framework. Objectness enhancement is the first effective technique. It exploits the detection module to produce object region proposals with category probability, and these regions are used to weight the parsing feature map directly. 'Extra background' category, as a specific category, is often attached to the category space for improving parsing result in semantic and instance segmentation tasks. In scene parsing tasks, extra background category is still beneficial to improve the model in training. However, some pixels may be assigned into this nonexistent category in inference. Black-hole filling technique is proposed to avoid the incorrect classification. For verifying these two techniques, we integrate them into a parsing framework for generating parsing result. We call this unified framework as Objectness Enhancement Network (OENet). Compared with previous work, our proposed OENet system effectively improves the performance over the original model on SceneParse150 scene parsing dataset, reaching 38.4 mIou (mean intersection-over-union) and 77.9% accuracy in the validation set without assembling multiple models. Its effectiveness is also verified on the Cityscapes dataset.

关键词： objectness region enhancement black-hole filling scene parsing instance enhancement objectness region proposal

General Character of Quantum Regular Motion and Quantum-Classical Correspondence

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Chinese Physics Letters 1999年第5期16卷 318-320页

作者： XU Gong-ou YANG Ya-tian XING Yong-zhong Department of Physics Nanjing UniversityNanjing 210093 Department of Physics Fujian Normal UniversityFuzhou 350007

In order to have a complete description of the spatio-temporal evolution of a quantum state,the initial state should be properly specified as the coherent state corresponding to a definite dynamical *** we have qualitatively different situations where the initial coherent state evolves under the action of a system having or not having the same dynamical *** the former case,we have regular motion with the general character which tends to that of the corresponding classical case in the limit n→*** in the latter case,we may have energy regions of global stochasticity with characters closely related to the initial dynamical symmetry strongly violated.

关键词： dynamical coherent Regular

Topological Approach to the Study of Global Stationary Property of Quantum Systems

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Chinese Physics Letters 1999年第2期16卷 82-84页

作者： XU Gong-ou XING Yong-zhong YANG Ya-tian Department of Physics Nanjing UniversityNanjing 210093 Department of Physics fujian Normal Universityfuzhou 350007

A topological approach to the study of global stationary property of quantum systems is carefully *** attentions are paid to basic notions such as homeomorphic map,topological-structure-preserving(TSP)map,and bifurcat... 详细信息

关键词： topological Stationary bifurcation

Ultrahigh electrostrain with excellent fatigue resistance in textured Nb^(5+)-doped(Bi_(0.5)Na_(0.5))TiO3-based piezoceramics

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Journal of Advanced Ceramics 2023年第3期12卷 487-497页

作者： Lixiang Lai Zhihao Zhao Shuo tian Bao ou Gaoyuan Liang Bin Li Yejing Dai School of Materials Sun Yat-sen UniversityShenzhen 518107China

(Bi_(0.5)Na_(0.5))TiO_(3)(BNT)-based lead-free piezoceramics exhibit excellent electric field-induced strain(electrostrain)properties,but often suffer from large hysteresis and poor fatigue resistance,which strongly limit their ***,textured Nb5+-doped 0.8(Bi_(0.5)Na_(0.5))TiO_(3)–0.2(Bi_(0.5)K_(0.5))TiO_(3)(0.8BNT–0.2BKT)ceramics with a high degree of texturing(~80%)were prepared by the reactive template grain growth(RTGG)method using Bi4Ti3O12 as a *** the combination of donor doping in the B-site and the RTGG method,the electrostrain performance achieves a significant enhancement.A high electrostrain of 0.65%and a piezoelectric coefficient(*33 d)of 1083 pm/V with reduced hysteresis at an electric field of 6 kV/mm are *** electrostrain performance degradation is observed after unipolar electric field loading of 10^(5)cycles,showing excellent fatigue *** results indicate that the texturing BNT-based lead-free piezoceramics by the RTGG method is a useful approach to developing eco-friendly actuators.

关键词： (Bi_(0.5)Na_(0.5))TiO_(3)(BNT)-based ceramics donor doping electrostrain textured ceramics

Co-influencing mechanisms of physicochemical properties of blasting dust in iron mines on its wettability

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International Journal of Minerals,Metallurgy and Materials 2019年第9期26卷 1080-1091页

作者： Jian-guo Liu Long-zhe Jin Jia-ying Wang Sheng-nan ou tian-yang Wang School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of Education University of Science and Technology BeijingBeijing 100083China Mine Emergency Technology Research Center University of Science and Technology BeijingBeijing 100083China

This study explores the key physicochemical factors affecting the hydrophilic characteristics of iron mine blasting dust(BD). The BD is separated into an unwetted part(UWBD, hydrophobic part) and a wetted part(WBD, hydrophilic part). Its particle size, true density(TD), pore parameters, mineral composition, and surface compounds are comprehensively characterized and compared. The results indicate that a smaller particle size and more developed pore parameters are two key factors responsible for the strong hydrophobicity of the BD. The mineral composition of the BD has no direct effect on its wetting properties;however, it indirectly influences the deposition characteristics of the BD in water by affecting its TD. Unlike coal dust, the surface organic composition of the BD does not affect its wettability and the peak area of C–C/C–H hydrophobic groups in the C 1s X-ray photoelectron spectrum of the UWBD(45.03%) is smaller than that in the C 1s spectrum of the WBD(68.30%). Thus, eleven co-influencing processes of physicochemical properties of the BD on its wettability are summarized. This research sheds light on the key factors affecting the wettability of the BD.

关键词： blasting dust physicochemical characteristics hydrophilic contact angle iron mine