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Neighbor Library-Aware Graph Neural Network for Third Party Library Recommendation

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Tsinghua Science and Technology 2023年第4期28卷 769-785页

作者： ying jin Yi Zhang Yiwen Zhang School of Artificial Intelligence and Big Data Hefei UniversityHefei 230601China School of Computer Science and Technology Anhui UniversityHefei 230601China

Modern software development has moved toward agile growth and rapid delivery,where developers must meet the changing needs of users *** such a situation,plug-and-play Third-Party Libraries(TPLs)introduce a considerable amount of convenience to ***,selecting the exact candidate that meets the project requirements from the countless TPLs is challenging for *** works have considered setting up a personalized recommender system to suggest TPLs for ***,these approaches rarely consider the complex relationships between applications and TPLs,and are unsatisfactory in accuracy,training speed,and convergence *** this paper,we propose a new end-to-end recommendation model called Neighbor Library-Aware Graph Neural Network(NLA-GNN).Unlike previous works,we only initialize one type of node embedding,and construct and update all types of node representations using Graph Neural Networks(GNN).We use a simplified graph convolution operation to alternate the information propagation process to increase the training efficiency and eliminate the heterogeneity of the app-library bipartite graph,thus efficiently modeling the complex high-order relationships between the app and the *** experiments on large-scale real-world datasets demonstrate that NLA-GNN achieves consistent and remarkable improvements over state-of-the-art baselines for TPL recommendation tasks.

关键词： Third-Party Library(TPL) TPL recommendation Graph Neural Network(GNN) bipartite graph

A Time-Aware Dynamic Service Quality Prediction Approach for Services

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Tsinghua Science and Technology 2020年第2期25卷 227-238页

作者： ying jin Weiguang Guo Yiwen Zhang Department of Management Hefei UniversityHefei 230601China School of Computer Science and Technology and also with the Key Laboratory of Intelligent Computing and Signal ProcessingMinistry of EducationAnhui UniversityHefei 230601China

Dynamic Quality of Service(QoS)prediction for services is currently a hot topic and a challenge for research in the fields of service recommendation and *** paper addresses the problem with a Time-aWare service Quality Prediction method(named TWQP),a two-phase approach with one phase based on historical time slices and one on the current time *** the first phase,if the user had invoked the service in a previous time slice,the QoS value for the user calling the service on the next time slice is predicted on the basis of the historical QoS data;if the user had not invoked the service in a previous time slice,then the Covering Algorithm(CA)is applied to predict the missing *** the second phase,we predict the missing values for the current time slice according to the results of the previous phase.A large number of experiments on a real-world dataset,WS-Dream,show that,when compared with the classical QoS prediction algorithms,our proposed method greatly improves the prediction accuracy.

关键词： dynamic Quality of Service(QoS)prediction time-aware service recommendation

The possible KK^(*)and D^(*)bound and resonance states by solving the Schrodinger equation

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Communications in Theoretical Physics 2024年第10期76卷 85-91页

作者： Bao-Xi Sun Qin-Qin Cao ying-tai Sun School of Physics and Optoelectronic Engineering Beijing University of TechnologyBeijing 100124China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The Schrodinger equation with a Yukawa type of potential is solved *** different boundary conditions are taken into account,a series of solutions are indicated as a Bessel function,the first kind of Hankel function and the second kind of Hankel function,***,the scattering processes of K^(*)and D^(*)are *** the K^(*)sector,the f_(1)(1285)particle is treated as a K^(*)bound state,therefore,the coupling constant in the K^(*)Yukawa potential can be fixed according to the binding energy of the f_(1)(1285)***,a K^(*)resonance state is generated by solving the Schrodinger equation with the outgoing wave condition,which lies at 1417-i18 MeV on the complex energy *** is reasonable to assume that the K^(*)resonance state at 1417-i18 MeV might correspond to the f_(1)(1420)particle in the review of the Particle Data *** the D^(*)sector,since the X(3872)particle is almost located at the D^(*)threshold,its binding energy is approximately equal to ***,the coupling constant in the D^(*)Yukawa potential is determined,which is related to the first zero point of the zero-order Bessel *** to the K^(*)case,four resonance states are produced as solutions of the Schrodinger equation with the outgoing wave *** is assumed that the resonance states at 3885~i1 MeV,4029-i108 MeV,4328-i191 MeV and 4772-i267 MeV might be associated with the Zc(3900),the X(3940),theχ_(c1)(4274)andχ_(c1)(4685)particles,*** is noted that all solutions are isospin degenerate.

关键词： non-Hermitian quantum mechanics Schrodinger equation meson-meson interaction one-pion exchanging potential resonance state bound state

A Property Satisfying Reducedness over Centers

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Algebra Colloquium 2021年第3期28卷 453-468页

作者： Hailan jin tai Keun Kwak Yang Lee Zhelin Piao Department of Mathematics Yanbian UniversityYanjiJilin 133002China Department of Mathematics Daejin UniversityPocheon 11159Korea Institute of Basic Science Daejin UniversityPocheon 11159Korea

This article concerns a ring property called pseudo-reduced-over-center that is satisfied by free algebras over commutative reduced *** properties of radicals of pseudo-reduced-over-center rings are investigated,especially related to polynomial *** is proved that for pseudo-reduced-over-center rings of nonzero characteristic,the centers and the pseudo-reduced-over-center property are preserved through factor rings modulo nil *** a locally finite ring R,it is proved that if R is pseudo-reduced-over-center,then R is commutative and R/J(R)is a commutative regular ring with J(R)nil,where J(R)is the Jacobson radical of R.

关键词： pseudo-reduced-over-center ring center radical commutative ring polynomial ring right quotient ring Abelian ring

Development of a system configuration for a solar powered hydrogen facility using fuzzy logic control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 822-834页

作者： ying-tai LOONG Mahidzal DAHARI Hwa-jen YAP Hue-yee CHONG Department of Mechanical Engineering Faculty of Engineering University MalayaKuala Lumpur 50603 Malaysia

Solar energy is a natural resource which can be harnessed to provide clean electricity for hydrogen production ***, this technology is not widely used because of control issues, particularly for hydrogen refuelling stations. At present,direct or DC-DC converter couplings are the most common system configurations for hydrogen refuelling stations. However, these system configurations are costly and suffer from gas shortage at hydrogen refuelling stations. Furthermore, the hydrogen produced by such system configurations varies considerably depending on the levels of solar radiation. In order to address these issues, a new system configuration is proposed, incorporating the feedback signal of the storage level in the control system. The photovoltaic(PV) system, electrolyzer, and storage tank are integrated with a fuzzy logic controller(FLC) to determine the backup current compensation for electrolyzer operation in order to obtain the minimum power required for hydrogen production. The proposed FLC is constructed with three input variables which are the PV current, hydrogen storage level, and the battery state of charge. The rules-based fuzzy inference process is based on the proposed configuration which combines the advantages of direct and DC-DC converter coupling configurations. The simulation results show that the proposed configuration offers better adaptability to variable radiation conditions compared to other methods. This gives a more promising option for ensuring the adequacy of hydrogen supply at hydrogen refuelling stations.

关键词： Hydrogen energy Solar energy Hydrogen refueling facility Fuzzy logic

Nuclear 0ν2βdecays in B-L symmetric SUSY model and in TeV scale left–right symmetric model

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Communications in Theoretical Physics 2022年第8期74卷 76-92页

作者： jin-Lei Yang Chao-Hsi Chang tai-Fu Feng CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Physics Hebei UniversityKey Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei ProvinceBaoding071002China

In this paper,we take the B-L supersymmetric standard model(B-LSSM)and TeV scale left–right symmetric model(LRSM)as two representations of the two kinds of new physics models to study the nuclear neutrinoless double beta decays(0ν2β)so as to see the senses onto these two kinds of models when the decays are taken into account *** the parameter spaces allowed by all the existing experimental data,the decay half-life of the nucleus^(76)Ge and^(136)Xe,T_(12)^(0ν)(^(76)Ge,^(136)Xe),is precisely calculated and the results are presented *** on the numerical results,we conclude that there is greater room for LRSM type models than for B-LSSM type models in foreseeable future experimental observations on the decays.

关键词： B-LSSM QCD correction neutrinoless double beta decay LRSM

Electrochemical hydrogen storage characteristics of La_(0.75-x) M_xMg_(0.25)Ni_(3.2)Co_(0.2)Al_(0.1)(M=Zr,Pr;x=0,0.1) alloys prepared by melt spinning

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Rare Metals 2012年第5期31卷 -页

作者： ZHANG Yanghuan YANG tai CAI ying HOU Zhonghui REN Huiping ZHAO Dongliang Key Laboratory of Integrated Exploitation of Baiyun Obo Mutti-Metal Resources Inner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China

In order to ameliorate the electrochemical hydrogen storage performances of La-Mg–Ni system A_2B_7-type electrode alloys, the partial substitution of M (M = Zr, Pr) for La was performed. The melt spinning technology was used to fabricate the La_(0.75-x)M_xMg_0.25Ni_3.2Co_0.2Al_0.1 (M = Zr, Pr; x = 0, 0.1) electrode alloys. The influences of the melt spinning and substituting La with M (M = Zr, Pr) on the structures and the electrochemical hydrogen storage characteristics of the alloys were investigated. The analysis of XRD, SEM, and TEM reveals that the as-cast and spun alloys have a multiphase structure composed of two main phases (La, Mg)_2Ni_7 and LaNi_5 as well as a residual phase LaNi_2 . The as-spun (M = Pr) alloy displays an entire nanocrystalline structure, while an amorphous-like structure is detected in the as-spun (M = Zr) alloy, implying that the substitution of Zr for La facilitates the amorphous formation. The electrochemical measurements exhibit that the substitution of Pr for La clearly increases the discharge capacity of the alloys; however, the Zr substitution brings on an adverse impact. Meanwhile, the M (M = Zr, Pr) substitution significantly enhances its cycle stability. The melt spinning exerts an evident effect on the electrochemical performances of the alloys, whose discharge capacity and high rate discharge ability (HRD) first mount up and then fall with the growing spinning rate, whereas their cycle stabilities monotonously augment as the spinning rate increases.

关键词： A_2B_7-type electrode alloy element substitution melt spinning electrochemical performance

Colon signet-ring cell carcinoma with chylous ascites caused by immunosuppressants following liver transplantation:A case report

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2343-2350页

作者： ying Li Yang tai Hao Wu Department of Gastroenterology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Chylous ascites is caused by disruption of the lymphatic system,which is characterized by the accumulation of a turbid fluid containing high levels of triglycerides within the abdominal *** two most common causes are cirrhosis and tuberculosis,and colon signer ring cell carcinoma(SRCC)due to the use of immunosuppressants is extremely rare in cirrhotic patients after liver transplantation,making it prone to misdiagnosis and missed *** SUMMARY A 52-year-old man who underwent liver transplantation and was administered with immunosuppressants for 8 months was admitted with a 3-month history of progressive abdominal ***,based on lymphoscintigraphy and lymphangiography,lymphatic obstruction was considered,and cystellar chyli decompression with band lysis and external membrane stripping of the lymphatic duct was ***,his abdominal distention was persistent without *** paracentesis revealed allogenic cells in the ascites,and immunohistochemistry analysis revealed adenocarcinoma cells with phenotypic features suggestive of a gastrointestinal *** endoscopy was performed,and biopsy showed atypical signet ring cells in the ileocecal *** patient eventually died after a three-month follow-up due to progression of the *** Colon SRCC,caused by immunosuppressants,is an unusual but un-neglected cause of chylous ascites.

关键词： Colonic signer ring cell carcinoma Immunosuppressant Chylous ascites Cirrhosis Liver transplantation Case report

Sliding wear behaviour of Fe/316L/430-Ti(C,N)composites prepared via spark plasma sintering and subsequent heat treatment

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International Journal of Minerals,Metallurgy and Materials 2021年第7期28卷 1215-1223页

作者： Dao-ying Chen ying Liu Ren-quan Wang jin-wen Ye School of Materials Science and Engineering Sichuan UniversityChengdu 610065China

A series of novel steel-Ti(C,N)composites was fabricated by spark plasma sintering(SPS)and subsequent heat *** hardness,indentation fracture resistance,and wear behaviour of the steel-Ti(C,N)composites were compared with those of the unreinforced samples,and their potentials were assessed by comparison with traditional cermet/hardmetal *** results showed that with the addi-tion of 20wt%Ti(C,N),the wear rates of the newly examined composites reduced by a factor of about 2 to 4 and were comparable to those of cermets and *** martensitic transformation of the steel matrix and the formation of in situ carbides induced by heat treatment en-hanced the wear *** the presence of excessive in situ carbides improved the hardness,the low indentation fracture resistance(IFR)value resulted in brittle fracture,which in turn resulted in poor wear ***,the operative wear mechanisms were *** study provides a practical and cost-effective approach to prepare steel-Ti(C,N)composites as potential wear-resistant materials.

关键词： iron-based composite spark plasma sintering heat treatment titanium carbonitride wear resistance