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Transient Response in a Bi-material Cylinder of Soft Ferromagnetic Material Subjected to Magnetic Shock

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Acta Mechanica Solida Sinica 2021年第2期34卷 286-296页

作者： Zhangjianing Cheng quan Jiang College of Civil Engineering Tongji UniversityShanghai 200092China School of Transportation and Civil EngiTieering Nantong UniveirsityNantong 226019China

The transient response in a bi-material cylinder of soft ferromagnetic material under magnetic shock is investigated in this *** analytical solutions for displacement and stress have been derived using the finite Hankel transform and the Laplace *** numerical examples show that the displacement and stress fields respond dynamically in the bi-material cylinder under magnetic *** derived displacement at the center and radial stress on the surface of the cylinder satisfy the boundary conditions,showing the correctness of *** displacement and stress waves propagate from the surface to the center of the cylinder when the magnetic field is *** stress fields increase from the center to the surface of the cylinder and are much larger than the quasi-static state since the waves reflect,collide and concentrate in the body of the *** method of this paper can be used in the design of soft ferromagnetic structures.

关键词： Soft ferromagnetic material Bi-material cylinder Transient stress Magnetic shock

A Machine Learning Method for Differentiating and Predicting Human-Infective Coronavirus Based on Physicochemical Features and Composition of the Spike Protein

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Chinese Journal of Electronics 2021年第5期30卷 815-823页

作者： WANG Chao ZOU quan Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Hainan Key Laboratory for Computational Science and Application Hainan Normal University

Several Coronaviruses(CoVs) are epidemic pathogens that cause severe respiratory syndrome and are associated with significant morbidity and mortality. In this paper, a machine learning method was developed for predicting the risk of human infection posed by CoVs as an early warning system. The proposed Spike-SVM(Support vector machine) model achieved an accuracy of 97.36% for Human-infective CoV(HCoV) and Nonhuman-infective CoV(Non-HCoV) classification. The top informative features that discriminate HCoVs and Non-HCoVs were identified. Spike-SVM is anticipated to be a useful bioinformatics tool for predicting the infection risk posed by CoVs to humans.

关键词： Spike protein NonHCoVs genetics microorganisms Support vector machine mortality Spike-SVM model Human-infective CoV severe respiratory syndrome machine learning method biology computing predicting Human-infective coronavirus diseases proteins HCoV human infection differentiating Nonhuman-infective CoV infection risk CoVs discriminate HCoVs learning (artificial intelligence) bioinformatics support vector machines informative features significant morbidity molecular biophysics early warning system epidemic pathogens Coronaviruses

Learning multi-tasks with inconsistent labels by using auxiliary big task

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Frontiers of Computer Science 2023年第5期17卷 119-132页

作者： quan FENG Songcan CHEN College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China MIIT Key Laboratory of Pattern Analysis and Machine Intelligence Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Multi-task learning is to improve the performance of the model by transferring and exploiting common knowledge among *** MTL works mainly focus on the scenario where label sets among multiple tasks(MTs)are usually the same,thus they can be utilized for learning across the ***,the real world has more general scenarios in which each task has only a small number of training samples and their label sets are just partially overlapped or even *** such MTs is more challenging because of less correlation information available among these *** this,we propose a framework to learn these tasks by jointly leveraging both abundant information from a learnt auxiliary big task with sufficiently many classes to cover those of all these tasks and the information shared among those partiallyoverlapped *** our implementation of using the same neural network architecture of the learnt auxiliary task to learn individual tasks,the key idea is to utilize available label information to adaptively prune the hidden layer neurons of the auxiliary network to construct corresponding network for each task,while accompanying a joint learning across individual *** experimental results demonstrate that our proposed method is significantly competitive compared to state-of-the-art methods.

关键词： multi-task learning inconsistent labels auxiliary task

Trends and Potential of Machine Learning and Deep Learning in Drug Study at Single-Cell Level

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Research 2023年第4期2023卷 145-162页

作者： Ren Qi quan Zou Yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou 324000China School of Life Science and Technology University of Electronic Science and Technology of ChinaChengduChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina.

Cancer treatments always face challenging problems,particularly drug resistance due to tumor cell *** existing datasets include the relationship between gene expression and drug sensitivities;however,the majority are based on tissue-level *** drugs at the single-cell level are perspective to overcome minimal residual disease caused by subclonal resistant cancer cells retained after initial curative ***,machine learning techniques can help us understand how different types of cells respond to different cancer drugs from the perspective of single-cell gene *** modeling using single-cell data and drug response information will not only improve machine learning for cell-drug outcome prediction but also facilitate the discovery of drugs for specific cancer subgroups and specific cancer *** this paper,we review machine learning and deep learning approaches in drug *** analyzing the application of these methods on cancer cell lines and single-cell data and comparing the technical gap between single-cell sequencing data analysis and single-cell drug sensitivity analysis,we hope to explore the trends and potential of drug research at the single-cell data level and provide more inspiration for drug research at the single-cell *** anticipate that this review will stimulate the innovative use of machine learning methods to address new challenges in precision medicine more broadly.

关键词： drugs expression overcome

Multiple phase detector of M-ary phase shift keying symbols in code division multiple access systems

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Journal of Central South University 2011年第4期18卷 1080-1086页

作者： quan Zhi Federal University of Juiz de fora Electrical Engineering Juiz de fora MG Brazil Zip

A novel iterative technique, the phase descent search detection was proposed. This technique constrained the solution （PDS） algorithm, for M-ary phase shift keying （M-PSK） symbols to have a unit magnitude and it was based on coordinate descent iterations where coordinates were the unknown symbol phases. The PDS algorithm, together with a descent local search （also implemented as a version of the PDS algorithm）, was used multiple times with different initializations in a proposed multiple phase detector; the solution with the minimum cost was then chosen as the final solution. The simulation results show that for highly loaded multiuser scenarios, the proposed technique has a detection performance that is close to the single-user bound. The results also show that the multiple phase detector allows detection in highly overloaded scenarios and it exhibits near-far resistance. In particular, the detector has a performance that is significantly better, and complexity that is significantly lower, than that of the detector based on semi-definite relaxation.

关键词： coordinate descent complexity M-ary phase shift keying (M-PSK) multiuser detection quadratic optimization semi-definite relaxation

Genus Expanded Cut-and-join Operators and Generalized Hurwtiz Numbers

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Acta Mathematica Sinica,English Series 2016年第9期32卷 1089-1098页

作者： quan ZHENG College of Mathematics Sichuan University Chengdu 610064 P. R. China

To distinguish the contributions to the generalized Hurwitz number of the source Riemann surface with different genus, by observing carefully the symplectic surgery and the gluing formulas of the relative GW-invariants, we define the genus expanded cut-and-join operators. Moreover all normalized the genus expanded cut-and-join operators with same degree form a differential algebra, which is isomorphic to the central subalgebra of the symmetric group algebra. As an application, we get some differential equations for the generating functions of the generalized Hurwitz numbers for the source Riemann surface with different genus, thus we can express the generating functions in terms of the genus expanded cut-and-join operators.

关键词： Genus expanded cut-and-join operator differential algebra Hurwitz number generating function

The [4+2] Cycloaddition of 2-Pyrone in Total Synthesis

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Chinese Journal of Chemistry 2019年第9期37卷 946-976页

作者： quan Cai Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University220 Handan Rd.Shanghai 200433China

Diels-Alder reaction is one of the most important reactions in organic synthesis and has witnessed great achievements in total syntheses of complex natural *** this review,we will focus on the [4+2] cycloaddition that utilizes 2-pyrone as the diene *** advances of its applications in the total syntheses of natural products in the past fifty years will be discussed here.

关键词： Cycloaddition 2-Pyrone Total Synthesis

Copper-Catalyzed Amination of Aryl Halides with Aqueous Ammonia under Mild Conditions

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Chinese Journal of Chemistry 2013年第4期31卷 501-506页

作者： Zhengjun quan Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education Lanzhou Gansu 730070 China Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical Engineering Northwest Normal University Anning East Road 967# Lanzhou Gansu 730070 China

A Cu（I） generated in situ from CuSO4.5H2O/sodium ascorbate catalyzed cross-coupling reaction of aryl halides with aqueous ammonia for the synthesis of primary aromatic amines has been developed. Key to the success i... 详细信息

关键词： amination aqueous ammonia copper catalysis aryl halides primary anilines

Bibliometric analysis of UAV swarms

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Journal of Systems Engineering and Electronics 2022年第2期33卷 406-425页

作者： JIANG Yangyang GAO Yan SONG Wenqi LI Yue quan quan Beihang University Library Beijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Projects on unmanned aerial vehicle(UAV) swarms have been initiated in a big way in the last few years, especially from 2015 to 2016. As a result, the number of related works on UAV swarms has been on the rise, with the rate of growth dramatically accelerating since 2017. This research conducts a bibliometric analysis of robotics swarms and UAV swarms to answer the following questions:(i) Disciplines mentioned in the UAV swarms research.(ii) The future development trends and hotspots in the UAV swarms research.(iii) Tracking related outcomes in the UAV swarms research.

关键词： unmanned aerial vehicle(UAV)swarm bibliometric mapping knowledge domain