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Pedosphere 2010年第1期20卷 104-110页

作者： GAO Hong-jian jianG xin School of Resources and Environmental Science Anhui Agricultural University Hefei 230036 (China) State Key Lab of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China)

Adsorption and desorption are important processes that influence the transport, transformation, and bioavailability of hexachlorobenzene (HCB) in soils. To examine the adsorption-desorption characteristics of HCB, equilibrium batch experiments were carried out using two soils (red soil and paddy soil) with different initial HCB concentrations (0.25, 0.50, 0.75, 1.00, 1.50, 2.50, 3.50, and 5.00 mg L-1 ) by using 0.01 mol L-1 calcium chloride as the background solution. The successive desorption experiments (48, 96, 144, 192, and 240 h) were conducted after each adsorption equilibrium experiment. The results revealed that adsorption and desorption isotherms of HCB on two soils were nonlinear, which can be best described by the Freundlich equation with the square of the correlation coefficient (r 2 ) ranging from 0.97 to 0.99. Desorption of HCB from the two soils exhibited hysteresis at all HCB concentrations because the Freundlich desorption coefficients were always higher than the Freundlich adsorption coefficients. The hysteretic effect was enhanced with increasing initial HCB concentration, and positive hysteresis was observed at different concentrations.

关键词： Freundlich equation sorption coefficients sorption isotherms

Homology Cycles and Dependent Cycles of Hypergraphs

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Acta Mathematicae Applicatae Sinica 2018年第2期34卷 237-248页

作者： jian-fang WANG xin XU Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China School of Sciences North China University of Technology Beijing 100144 China

In this paper, some new concepts for hypergraphs are introduced. Based on the previous results, we do further research on cycle structures of hypergraphs and construct a more strictly complete cycle structure system o... 详细信息

关键词： hypergraph semilattice cycle maximal cycle homology cycle

Recovery of greenhouse gas as cleaner fossil fuel contributes to carbon neutrality

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Green Energy & Environment 2023年第2期8卷 351-353页

作者： xin Zhang jian-Rong Li Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Under the context of carbon neutrality of China,it is urgent to shift our energy supply towards cleaner fuels as well as to reduce the greenhouse gas ***,coal is the main fossil fuel energy source of *** country is striving hard to replace it with methane,a cleaner fossil *** China has rich geological resources of methane as coal bed methane(CBM)reserves,it is quite challenging to utilize them due to low *** CBM is however mainly emitted directly to atmosphere during coal mining,causing waste of the resource and huge contribution to greenhouse *** recent work by Yang et *** a potential solution to extract low concentration methane selectively from CBM through using MOF materials as *** kind of materials and associated separation technology are promising to reduce greenhouse gas emission and promote the methane production capability,which would contribute to carbon neutrality in dual pathways.

关键词： Carbon neutrality Coal bed methane Metal–organic frameworks Greenhouse gas Fossil fuel

Precision measurements and tau neutrino physics in a future accelerator neutrino experiment

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Communications in Theoretical Physics 2022年第3期74卷 51-69页

作者： jian tang Sampsa Vihonen Yu Xu School of Physics Sun Yat-sen UniversityGuangzhou 510275China

We investigate prospects of building a future accelerator-based neutrino oscillation experiment in China,including site selection,beam optimization and tau neutrino physics *** violation,non-unitary mixing and non-standard neutrino interactions are *** simulate neutrino beam setups based on muon and beta decay techniques and compare Chinese laboratory sites by their expected sensitivities.A case study on the Super Proton-Proton Collider and the China JinPing Laboratory is also *** is shown that the muon-decay-based beam setup can measure the Dirac CP phase by about 14.2°precision at 1σCL,whereas non-unitarity can be probed down to |α_(ij)|≲0.37(i≠j=1,2,3)and non-standard interactions to|ϵ_(ℓℓ′)^(m)|≲0.11(ℓ≠ℓ′=e,μ,τ)at 90% CL,respectively.

关键词： neutrino oscillation non-unitary mixing non-standard interaction

Recent Trends of In-Vehicle Time Sensitive Networking Technologies, Applications and Challenges

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China Communications 2023年第11期20卷 30-55页

作者： Yanli Xu jian Shang Hao tang School of Information Engineering Shanghai Maritime UniversityShanghai 201306China

With the vigorous development of automobile industry,in-vehicle network is also constantly upgraded to meet data transmission requirements of emerging *** main transmission requirements are low latency and certainty especially for autonomous *** sensitive networking(TSN)based on Ethernet gives a possible solution to these *** surveys usually investigated TSN from a general perspective,which referred to TSN of various application *** this paper,we focus on the application of TSN to the in-vehicle *** in-vehicle networks,we discuss all related TSN standards specified by IEEE 802.1 work group up to *** further overview and analyze recent literature on various aspects of TSN for automotive applications,including synchronization,resource reservation,scheduling,certainty,software and *** scenarios of TSN for in-vehicle networks are analyzed one by *** TSN of in-vehicle network is still at a very initial stage,this paper also gives insights on open issues,future research directions and possible solutions.

关键词： automobile industry deterministic transmission in-vehicle network low latency time sensitive networking(TSN)

Some Theorems for Hypersurface of Randers Spaces

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Acta Mathematica Sinica,English Series 2020年第10期36卷 1125-1139页

作者： Jin tang LI jian Feng ZHANG School of Mathematical Sciences Xiamen UniversityXiamen 361005P.R.China Department of Mathematics Lishui UniversityLishui 323000P.R.China

In this paper,we consider the hypersurfaces of Randers space with constant flag curvature.(1)Let(M^n+1,F)be a Randers–Minkowski ***(M^n,F)is a hypersurface of(M^n+1,F)with constant flag curvature K=1,then we can prove that M is Riemannian.(2)Let(M^n+1,F)be a Randers space with constant flag ***(M,F)is a compact hypersurface of(M^n+1,F)with constant mean curvature|H|.Then a pinching theorem is established,which generalizes the result of[***.,120,1223–1229(1994)]from the Riemannian case to the Randers space.

关键词： Randers space hypersurfaces constant mean curvature constant flag curvature

Distributional Chaos Occurring on the Set of Proper Positive Upper Banach Density Recurrent Points of One-sided Symbolic Systems

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Acta Mathematica Sinica,English Series 2020年第1期36卷 66-76页

作者： Yan Jie tang jian Dong YIN Department of Mathematics Nanchang University

The purpose of this paper is to show that for one-sided symbolic systems,there exists an uncountable distributionally scrambled set contained in the set of proper positive upper Banach density recurrent points.

关键词： Distributional chaos positive upper Banach density recurrent point one-sided symbolic system

Effect of particle micro-structure on the electrochemical properties of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode material

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International Journal of Minerals,Metallurgy and Materials 2022年第8期29卷 1618-1626页

作者： Zexun tang Hongqi Ye xin Ma Kai Han Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Cathode Material Research&Development Department Soundon New Energy Technology Co.Ltd.Xiangtan 411100China

Ni-rich layered material is a kind of high-capacity cathode to meet the requirement of electric *** for the typical LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) material,the particle formation is significant for electrochemical properties of the *** this work,the structure,morphology,and electrochemical performance of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) secondary particles and single crystals were systematically studied.A lower Ni^(2+)/Ni^(3+)molar ratio of 0.66 and a lower residual alkali content of 0.228wt%were achieved on the surface of the single *** addition,the single crystals showed a discharge capacity of 191.6 mAh/g at 0.2 C(~12 mAh/g lower than that of the secondary particles)and enhanced the electrochemical stability,especially when cycled at 50℃ and in a wider electrochemical window(between 3.0 and 4.4 V ***+/Li).The LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) secondary particles were suitable for applications requiring high specific capacity,whereas single crystals exhibited better stability,indicating that they are more suitable for use in long life requested devices.

关键词： Ni-rich layered materials single crystal cathode micro-structure lithium-ion battery

Design Optimization of Pillar Bump Structure for Minimizing the Stress in Brittle Low K Dielectric Material Layer

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Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 583-594页

作者： xin-jiang Long Jin-tang Shang Li Zhang Key Laboratory of MEMS of Ministry of Education Southeast UniversitySipailou 2#Nanjing 210096China jiangyin Changdian Advanced Packaging Co. Ltd.No.275 Binjiang RdJiangyin 214400China

Cu pillar bump offers a number of advantages for flip chip packaging,compared to the conventional solder ***,due to its rigidity structure,Cu pillar bump introduces a lot of stress to the chip,which causes the failure of packaging structures,especially for the advanced node devices which typically have brittle low K dielectric *** this paper,for the first time we propose two types of Cu pillar structures to reduce the *** first Cu pillar structure has bigger Cu dimensions at the *** other one is designed to add an additional Cu pad under the Cu pillar *** element analysis is used to study the stress of the both structures,and it is found that with the increase in pillar bump contact area over the chip surface,the stress decreases in both *** also indicate that the Cu pillar bump undercut induces higher stress,and thin Cu6 Snss intermetallic compound has less impact on the stress during flip chip mount *** study provides a novel way to improve the reliability by reducing the stress in the Cu pillar bump related packaging.

关键词： Cu pillar bump Flip chip Low K stress Undercut

Chromatin-remodeling complexes:Conserved and plant-specific subunits in Arabidopsis

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Journal of Integrative Plant Biology 2022年第2期64卷 499-515页

作者： Ji-Yun Shang xin-jian He National Institute of Biological Sciences Beijing102206 China Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua UniversityBeijing100084 China

Adenosine triphosphate-dependent chromatin remodeling complexes are important for the regulation of transcription,DNA replication,and genome stability in *** genetic studies have illustrated various biological functions of core and accessory subunits of chromatin-remodeling complexes in plants,the identification and characterization of chromatin-remodeling complexes in plants is lagging behind that in yeast and *** studies determined whether and how the Arabidopsis SWI/SNF,ISWI,INO80,SWR1,and CHD chromatin remodelers function in multi-subunit complexes in *** conserved and plant-specific subunits of chromatin-remodeling complexes have been identified and *** findings provide a basis for further studies of the molecular mechanisms by which the chromatinremodeling complexes function in plants.

关键词： ATPase chromatin remodeling complex INO80 ISWI SWI/SNF SWR1 transcription