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Open Journal of Geology 2019年第10期9卷 613-615页

作者： xiao teng Gang Li CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences Nanjing China University of Science and Technology of China Hefei China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences Nanjing China

Spinicaudatans, a suborder of the abandoned taxonomic group “Conchostraca”, are very useful for biostratigraphic subdivision and correlation of the non-marine successions, remarkably in otherwise fossil-scarce red beds. Feiyunella, a monospecies spinicaudatan genus, was established based on specimens from sediments of Upper Cretaceous red beds in different localities of Zhejiang Province. The morphological examination under a scanning electron microscope of the type specimens of Feiyunella zhedongensis (Chen and shen, 1977) has found that the paratype from the Fangyan Formation at xiaoling of Linhai City, Zhejiang Province, is not Feiyunella, but a younger individual of Linhaiella.

关键词： Spinicaudatan Feiyunella Linhaiella Taxonomy Cretaceous South-East China

Microstructure and mechanical properties of Ti-Cu amorphous coating synthesized on pure Cu substrate by mechanical alloying method

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Rare Metals 2020年第10期39卷 1222-1228页

作者： Cheng Chen xiao-mei Feng Yi-fu shen School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211800China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Mechanical alloying method was applied to fabricate coating with amorphous structure on pure Cu *** microstructure,the phase composition and the mechanical properties including microhardness and wear resistance of the coating were,respectively,characterized and *** results show that the coating is rough but *** has favorable adhesion to the *** coating is made up of an inner composite layer and an outer amorphous *** microhardness and the wear resistance of the pure Cu substrate are improved because of the bilayer *** formation mechanism of the coating was *** as-synthesized coating is considered to be effective to strengthen the surface of pure Cu substrate.

关键词： Coating Amorphous Mechanical alloying Surface reinforcement

Re-evaluating Transarterial Chemoembolization Failure/Refractoriness:A Survey by Chinese College of Interventionalists

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Journal of Clinical and Translational Hepatology 2021年第4期9卷 521-527页

作者： Bin-Yan Zhong Wan-sheng Wang shen Zhang Hai-Dong Zhu Lei Zhang Jian shen xiao-Li Zhu Gao-Jun teng Cai-Fang Ni Department of Interventional Radiology the First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina Center of Interventional Radiology&Vascular Surgery Department of RadiologyZhongda HospitalMedical SchoolSoutheast UniversityNanjingJiangsuChina

Background and Aims:The recognition of transarterial chemoembolization(TACE)failure/refractoriness among Chinese clinicians remains *** an online survey conducted by the Chinese College of Interventionalists(CCI),the aim of this study was to explore the recognition of TACE failure/refractoriness and review TACE application for hepatocellular carcinoma(HCC)treatment in clinical ***:From 27 August 2020 to 30 August 2020 during the CCI 2020 annual meeting,a survey with 34 questions was sent by email to 264 CCI clinicians in China with more than 10 years of experience using TACE for HCC ***:A total of 257 clinicians participated and responded to the *** participants agreed that the concept of“TACE failure/refractoriness”has scientific and clinical significance(n=191,74.3%).Nearly half of these participants chose TACE-based combination treatment as subsequent therapy after so-called TACE failure/refractoriness(n=88,46.1%).None of the existing TACE failure/refractoriness definitions were widely accepted by the participants;thus,it is necessary to re-define this concept for the treatment of HCC in China(n=235,91.4%).Most participants agreed that continuing TACE should be performed for patients with preserved liver function,presenting portal vein tumor thrombosis(n=242,94.2%)or extrahepatic spread(n=253,98.4%),after the previous TACE treatment to control intrahepatic lesion(s).Conclusions:There is an obvious difference in the recognition of TACE failure/refractoriness among Chinese clinicians based on existing *** work should be carried out to re-define TACE failure/refractoriness.

关键词： Hepatocellular carcinoma TACE Failure Refractoriness Survey

Kinematics Analysis and Singularity Avoidance of a Parallel Mechanism with Kinematic Redundancy

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 244-261页

作者： Chaoyu shen Haibo Qu sheng Guo xiao Li Robotics Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China China Waterborne Transport Research Institute Beijing 100088China Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control TechnologyMinistry of EducationBeijing Jiaotong UniversityBeijing 100044China

The kinematic redundancy is considered as a way to improve the performance of the parallel *** this paper,the kinematics performance of a three degree-of-freedom parallel mechanism with kinematic redundancy(3-DOF PM-KR)and the influence of redundant parts on the PM-KR are ***,the kinematics model of the PM-KR is *** inverse solutions,the Jacobian matrix,and the workspace of the PM-KR are ***,the influence of redundancy on the PM-KR is *** there exists kinematic redundancy,the PM-KR possesses fault-tolerant *** locking one actuating joint or two actuating joints simultaneously,the fault-tolerant workspace is *** the position of the redundant part is changed,the workspace and singularity will be *** results show that kinematic redundancy can be used to avoid ***,the simulations are performed to prove the theoretical analysis.

关键词： Parallel mechanism Kinematic redundancy Singularity Simulation analysis

Effect of baffles on bubble behavior in a bubbling fluidized bed for chemical looping processes

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Particuology 2020年第6期18卷 154-167页

作者： xiao Zhu Xuan Feng Yuanyuan Zou Laihong shen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast UniversityNanjing 210096China

A bubbling fluidized bed is generally used as the fuel reactor in chemical looping ***,in sufficient gas-solid contact remains a steadfast *** such,we propose the use of in ternal baffles to split bubbles at a high gas velocity and to restrict the movement of large-scale solids in the fluidized *** investigated the effect of baffle arrangement on the bubble size and energy,pressure gradient,particle distribution,and particle velocity in a fluidized bed using a computational particle fluid dynamics simulation based on our experimental *** discuss the main influenci ng factors,which in elude presence of caps,number of baffles,and the baffle opening *** baffle structure with caps efficiently broke the large bubbles without creating jet *** baffles were deemed suitable in the bed owing to the small bubble size and uniform gas-solid distribution in each *** selected a baffle opening ratio of 20.5%,which improved the flow pattern without causing a significant increase in the pressure gradient and particle velocity through the *** also discussed the potential for sea ling up this baffled fluidized bed for industrial applications.

关键词： Baffle Bubble behavior Fluidized bed Chemical looping CPFD simulations

On Complete Hypersurfaces with Constant Mean Curvature and Finite L^p-norm Curvature in R^(n+1)

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Acta Mathematica Sinica,English Series 2005年第3期21卷 631-642页

作者： Yi Bing shen xiao Hua ZHU Department of Mathematics Zhejiang University Hangzhou 310028 P. R. China School of Mathematical Sciences Peking University Beijing 100871 P. R. China

By using curvature estimates, we prove that a complete non-compact hypersurface M with constant mean curvature and finite L^n-norm curvature in R^1＋1 must be minimal, so that M is a hyperplane if it is strongly stable. This is a generalization of the result on stable complete minimal hypersurfaces of R^n＋1. Moreover, complete strongly stable hypersurfaces with constant mean curvature and finite L^1-norm curvature in R^1＋1 are considered.

关键词： Constant mean curvature Strong stability L^p-norm curvature

Equivalent Conditions of Complete Convergence and Complete Moment Convergence for END Random Variables

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Chinese Annals of Mathematics,Series B 2018年第1期39卷 83-96页

作者： Aiting shen Mei YAO Benqiong xiao School of Mathematical Sciences Anhui University Hefei 230601 China. School of Mathematics Hefei University of Technology Hefei 230009 China School of Mathematics Shandong University Jinan 250100 China

In this paper,the complete convergence and the complete moment convergence for extended negatively dependent(END,in short) random variables without identical distribution are *** some suitable conditions,the equivalence between the moment of random variables and the complete convergence is *** addition,the equivalence between the moment of random variables and the complete moment convergence is also *** applications,the Marcinkiewicz-Zygmund-type strong law of large numbers and the Baum-Katz-type result for END random variables are *** results obtained in this paper extend the corresponding ones for independent random variables and some dependent random variables.

关键词： Extended negatively dependent random variables Complete convergence Complete moment convergence

An algorithm for identifying symmetric variables in the canonical OR-coincidence algebra system

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第12期15卷 1174-1182页

作者： xiao-hua LI Ji-zhong shen Campus Information Center Zhejiang University Department of Information Science & Electronic Engineering Zhejiang University

To simplify the process for identifying 12 types of symmetric variables in the canonical OR-coincidence(COC) algebra system, we propose a new symmetry detection algorithm based on OR-NXOR expansion. By analyzing the relationships between the coefficient matrices of sub-functions and the order coefficient subset matrices based on OR-NXOR expansion around two arbitrary logical variables, the constraint conditions of the order coefficient subset matrices are revealed for 12 types of symmetric variables. Based on the proposed constraints, the algorithm is realized by judging the order characteristic square value matrices. The proposed method avoids the transformation process from OR-NXOR expansion to AND-OR-NOT expansion, or to AND-XOR expansion, and solves the problem of completeness in the dj-map method. The application results show that, compared with traditional methods, the new algorithm is an optimal detection method in terms of applicability of the number of logical variables, detection type, and complexity of the identification process. The algorithm has been implemented in C language and tested on MCNC91 benchmarks. Experimental results show that the proposed algorithm is convenient and efficient.

关键词： Symmetric variable dj-map Canonical OR-coincidence algebra system Boolean function

Recent advances in membrane bioreactor technology for wastewater treatment in China

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Frontiers of Environmental Science & Engineering 2010年第3期4卷 245-271页

作者： Xia HUANG Kang xiao Yuexiao shen State Key Joint Laboratory of Environmental Simulation and Pollution Control Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China

Since the introduction of the membrane bioreactor(MBR)in China in the early 1990s,remarkable progress has been achieved on the research and application of this *** has now become one of the most active fields in the world in this *** review outlines the development of MBR-based processes in China and their performance of treating municipal and industrial *** membrane fouling is a critical operational problem with MBR processes,this paper also proposes updated understanding of fouling mechanisms and strategies of fouling control,which are mainly compiled from publications of Chinese *** for the commercial application of MBR in the country,the latest statistics of large-scale MBR plants(>10000 m^(3)·d^(–1))are provided,and the growth trend of total treatment capacity as well as its driving force is analyzed.

关键词： membrane bioreactor(MBR) municipal wastewater treatment industrial wastewater treatment membrane fouling commercial application China

Stereoselective formation of Z-monofluoroalkenes by nickel-catalyzed defluorinative coupling of gem‑difluoroalkenes with lithium organoborates

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Chinese Chemical Letters 2022年第9期33卷 4277-4280页

作者： Yisa xiao Weichen Huang Qilong shen Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

A method for stereoselective construction of Z-monofluoroalkenes by nickel-catalyzed defluorinative coupling of gem‑difluoroalkenes in mild conditions was *** combination of lithium organoborate and ZnBr_(2) generated in situ lithium aryl zincates,which facilitates the transmetalation step of the nickel-catalyzed cross coupling reaction.

关键词： gem‑Difluoroalkenes Lithium organoborate Defluorination Nickel Coupling