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Factors affecting college students’attitudes towards carpooling

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Transportation Safety and Environment 2024年第2期6卷 55-62页

作者： linchao Li Huali Zhang Zuoxian Gan College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518060China College of Transportation Engineering Dalian Maritime UniversityDalian 116026LiaoningChina

As a sustainable mode of travel,carpooling is an effective solution to environmental and energy problems,but it has not been fully *** research on carpooling attitudes,especially for college students,still needs to be *** response to this problem,this paper aims to investigate the effect of personal attributes,travel attributes,attitude attributes and other attributes of students on carpooling attitudes in *** collect the data,an online questionnaire survey was implemented at Shenzhen University,and 514 students *** on the samples,the multinomial logit model is used to explore the contribution of all *** model results showed that personal attributes such as sex and age had no significant effect on the attitude of college students towards *** safety of carpooling and its high cost make college students have a neutral attitude towards *** most concerning factor for college students in carpooling is *** findings can provide valuable suggestions for measures to be taken in response to different attributes affecting students’attitudes and are particularly important for the university and government to make optimal decisions to motivate students to select carpooling.

关键词： carpooling attitudes college students multinomial logit traffic environment

Enhanced sodium storage performance in flexible free- standing multichannel carbon nanofibers with enlarged interlayer spacing

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Nano Research 2018年第4期11卷 2256-2264页

作者： Beibei Yuan linchao Zeng Xizhen Sun Yan Yu Qingsong Wang State Key Laboratory of Fire Science University of Sdence and Technology of China Hefei 230026 China Key Laboratory of Materials for Energy Conversion Chinese Academy of Sciences (CAS) Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China

A flexible and free-standing multichannel carbon nanofiber （MCNF） film electrode was fabricated through electrospinning and carbonization. After high-temperature treatment of MCNFs in vacuum, the obtained fibers （MCNFs-V） had a dilated interlayer spacing of graphene sheets （0.398 nm） and an ultra-low specific surface area （15.3 m2/g）. When used as an anode for sodium-ion batteries, the MCNFs-V showed a discharge plateau below 0.1 V, and sodium was intercalated into the stacked graphene sheets layers during the sodiation process. The MCNFs-V exhibited a reversible and high specific capacity of 222 mAh/g at a current density of 0.1 A/g after 100 cycles and excellent long-term cycling stability, which was superior to that of MCNFs. The improved sodium storage performance was attributed to the unique microstructure of the MCNFs-V with an enlarged interlayer spacing of graphene sheets for sodium intercalation. The MCNFs-V electrode holds great promise as an anode material for commercial sodium-ion batteries.

关键词： sodium-ion batteries nanofibers interlayer spacing flexible

Weight asynchronous update:Improving the diversity of filters in a deep convolutional network

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Computational Visual Media 2020年第4期6卷 455-466页

作者： Dejun Zhang linchao He Mengting Luo Zhanya Xu and Fazhi He School of Geography and Information Engineering China University of GeosciencesWuhan 430074China College of Information and Engineering Sichuan Agricultural UniversityYaan 625014China School of Computer Wuhan UniversityWuhan 430072China

Deep convolutional networks have obtained remarkable achievements on various visual tasks due to their strong ability to learn a variety of features.A welltrained deep convolutional network can be compressed to 20%–40%of its original size by removing filters that make little contribution,as many overlapping features are generated by redundant *** compression can reduce the number of unnecessary filters but does not take advantage of redundant filters since the training phase is not *** networks with residual,dense connections and inception blocks are considered to be able to mitigate the overlap in convolutional filters,but do not necessarily overcome the *** do so,we propose a new training strategy,weight asynchronous update,which helps to significantly increase the diversity of filters and enhance the representation ability of the *** proposed method can be widely applied to different convolutional networks without changing the network *** experiments show that the stochastic subset of filters updated in different iterations can significantly reduce filter overlap in convolutional *** experiments show that our method yields noteworthy improvements in neural network performance.

关键词： deep convolutional network model compression convolutional filter

Effects of Temperature and Liquid Nitrogen(LN2)on Coal’s Mechanical and Acoustic Emission(AE)Properties

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Fluid Dynamics & Materials Processing 2024年第6期20卷 1181-1202页

作者： Teng Teng Yuhe Cai linchao Wang Yanzhao Zhu Inner Mongolia Research Institute China University of Mining and Technology-BeijingOrdos017001China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology-BeijingBeijing100083China School of Civil Engineering and Architecture Xi’an University of TechnologyXi’an710048China

Liquid nitrogen has shown excellent performances as a good fracturing medium in the extraction of unconventional natural gas,and its application in coalbed methane extraction is currently a research *** study focuses on the acoustic emission properties of coal specimens treated utilizing liquid nitrogen with varying initial temperatures in a three-point bending *** examination of the load-displacement curves of the considered coal samples,their mechanical properties are also revealed for different initial temperatures and cycling *** findings demonstrate a gradual decline in the maximum load capacity of coal rock as the temperature ***,when subjected to the same temperature,an escalation in the cycling frequency leads to a reduction in the peak load of coal *** suggests that both temperature and cycling frequency exert a notable impact on the fracturing efficacy of liquid ***-thaw cycling treatments and exposure to high-temperature conditions can activate preexisting damage in the coal rock,and,accordingly,influence its mechanical *** particular,throughout the progressive loading of coal rock samples,the failure mechanisms are predominantly characterized by the occurrence of tensile cracks,succeeded by the development,spread,and fracture of shear fissures.

关键词： Liquid nitrogen fracturing three-point bending experiment mechanical characteristics

Organic structure and possible origin of ancient charred paddies at Chuodun Site in southern China

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Science China Earth Sciences 2009年第1期52卷 93-100页

作者： HU linchao LI Xia LIU BenDing GU Min DAI JingYu College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China National Laboratory of Solids State Microstructures Department of PhysicsNanjing UniversityNanjing 210093China

A number of ancient charred paddies with a 14C dating of about 5900 a BP were recovered in the sixth excavation at Chuodun Site and are assigned to the Majiabang culture(7-6 ka BP).To understand their formation mechanism,the ancient charred paddies were compared to modern paddies using FT-IR spectrum and thermaogravimetric *** the same time,modern charred paddies were made in helium by the laboratory method,and the structural characteristics of them and the ancient ones were revealed using CP/*** results show there are more aromatic moieties in ancient charred paddies compared to modern *** aliphatic components of modern charred paddies decrease continuously,accompanied by the accumulation of aromatic components,when the duration and temperature of oxidation increase,and the structure buildings of modern charred paddies are more similar to ancient *** the planting manner of paddies during Majiabang culture period,these ancient charred paddies might be a result of the original farming mode involving fire.

关键词： ancient charred paddies FT-IR TGA CP/MAS-13C-NMR formation mechanism

Formation blockage risk analysis of geothermal water reinjection:Rock property analysis,pumping and reinjection tests,and long-term reinjection prediction

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Geoscience Frontiers 2022年第1期13卷 310-325页

作者： Liang Zhang Songhe Geng linchao Yang Ronghua Wen Chuan He Zhen Zhao Guangxiong Qin School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao 266580China Environmental Geological Exploration Bureau of Qinghai Province Xining 810007China

The blockage induced by particle migration and deposition is one of the main reasons for the decrease of reinjection capacity in the porous geothermal reservoir with a low and medium *** this paper,a new drilled geothermal well in Xining basin China is taken as an example to investigate the formation blockage risk due to the movable clay and sand particles in *** physical properties of the reservoir rocks were analyzed,a series of pumping and reinjection tests were conducted,and the longterm reinjection performance of the well was predicted by numerical simulation based on the test *** results show that the geothermal reservoir rocks are argillaceous and weakly cemented sandstones with a content of movable clay and sand particles up to 0.18–23.42 wt.%.The well presented a high productivity of 935–2186 m3?d-1 at a pressure difference of 0.7–1.62 MPa in the pumping tests associated with a large amount of clay and sand particles produced out,while in the reinjection test,only a low injectivity of 240–480 m3?d-1 was observed at an injection pressure of 0.2–0.6 MPa with the clay and sand particles near the wellbore move into *** to the prediction,under conditions of a blockage risk,the injectivity of the well will start to decline after 100 days of injection,and in the third year,it will decrease by 59.00%–77.09%.The influence of invasion of pretreated suspended particles and scale particles can be *** conditions of a high blockage risk,the injectivity of the well will decrease significantly in the first 20–30 days,with a decline of 75.39%–78.96%.Generally,the higher the injection pressure or rate,the greater the decrease in injectivity of the well caused by particle *** lifting is an effective measure to remove the well blockage which can be used regularly.

关键词： Reinjection capacity Particle migration Blockage risk Prediction model

Synthesis of CA_(6)/AlON composite with enhanced slag resistance

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International Journal of Minerals,Metallurgy and Materials 2023年第4期30卷 756-765页

作者： Yunsong Liu Enhui Wang linchao Xu Tao Yang Zhijun He Tongxiang Liang Xinmei Hou Beijing Advanced Innovation Center for Materials Genome Engineering Collaborative Innovation Center of Steel TechnologyUniversity of Science and Tech-nology BeijingBeijing 10083China School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051China School of Materials Science and Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Different amounts of AlON have been introduced in calcium hexaaluminate(CA_(6)) using two approaches, that is, one-step and twostep methods, to improve the slag resistance of CA_(6). A one-step method can directly sinter the mixtures combining Al_(2)O_(3), CaCO_(3), and Al in flowing nitrogen, in which AlON clusters are always formed because of the poor wettability of Al by Al_(2)O_(3), leading to the high porosity of CA_(6)/AlON composite. In a two-step method, CA_(6)and AlON are prepared separately and then mixed and sintered in flowing nitrogen. Compared with the sample prepared by the one-step method, CA_(6)and AlON in composite by the two-step method are more uniformly distributed,and the optimized amount of AlON added is 10wt%. The slag corrosion and penetration test shows that the CA_(6)/AlON composite using the two-step method exhibits superior slag corrosion protection. The promoted effect of AlON on slag penetration and corrosion resistance is also discussed.

关键词： CA_(6)/AlON composite two-step method wettability slag resistance

Theoretical investigation of interaction between a rectangular plate and fractional viscoelastic foundation

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Journal of Rock Mechanics and Geotechnical Engineering 2014年第4期6卷 373-379页

作者： Chengcheng Zhang Honghu Zhu Bin Shi linchao Liu School of Earth Sciences and Engineering Nanjing University Nanjing University (Suzhou) High-Tech Institute School of Civil Engineering Xinyang Normal University

The interaction between plates and foundations is a typical problem encountered in geotechnical engineering. The long-term plate performance is highly dependent on the theological characteristics of ground soil. Compared with conventional linear theology, the fractional calculus-based theory is a more powerful mathematical tool that can address this issue. This paper proposes a fractional Merchant model （FMM） to investigate the time-dependent behavior of a simply supported rectangular plate on viscoelastic foundation. The correspondence principle involving Laplace transforms was employed to derive the closed-form solutions of plate response under uniformly distributed load. The plate deflection, bending moment, and foundation reaction calculated using the FMM were compared with the results obtained from the analogous elastic model （EM） and the standard Merchant model （SMM）. It is shown that the upper and lower bound solutions of the FMM can be determined using the EM. In addition, a parametric study was performed to examine the influences of the model parameters on the time- dependent behavior of the plate-foundation interaction problem. The results indicate that a small fractional differential order corresponds to a plate resting on a sandy soil foundation, while the fractional differential order value should be increased for a clayey soil foundation. The long-term performance of a foundation plate can be accurately simulated by varying the values of the fractional differential order and the viscosity coefficient. The observations from this study reveal that the proposed fractional model has the capability to capture the variation of plate deflection over many decades of time.

关键词： Viscoelastic foundation Plate deflection Ground settlement Fractional derivative Merchant model RheologyLaplace transform

Advances in proteome-wide analysis of plant lysine acetylation

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Plant Communications 2022年第1期3卷 115-134页

作者： linchao Xia Xiangge Kong Haifeng Song Qingquan Han Sheng Zhang Key Laboratory of Bio-Resource and Eco-Environment of the Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China

Lysine acetylation(LysAc)is a conserved and important post-translational modification(PTM)that plays a key role in plant physiological and metabolic *** on advances in Lys-acetylated protein immunoenrichment and mass-spectrometric technology,LysAc proteomics studies have been performed in many *** studies have made substantial contributions to our understanding of plant LysAc,revealing that Lys-acetylated histones and nonhistones are involved in a broad spectrum of plant cellular ***,we present an extensive overview of recent research on plant *** provide in-depth insights into the characteristics of plant LysAc modifications and the mechanisms by which LysAc participates in cellular processes and regulates metabolism and physiology during plant growth and ***,we summarize the characteristics of LysAc,including the properties of Lys-acetylated sites,the motifs that flank Lys-acetylated lysines,and the dynamic alterations in LysAc among different tissues and developmental *** also outline a map of Lys-acetylated proteins in the Calvin–Benson cycle and central carbon metabolism–related *** then introduce some examples of the regulation of plant growth,development,and biotic and abiotic stress responses by *** discuss the interaction between LysAc and Na-terminal acetylation and the crosstalk between LysAc and other PTMs,including phosphorylation and ***,we propose recommendations for future studies in the *** conclude that LysAc of proteins plays an important role in the regulation of the plant life cycle.

关键词： lysine acetylproteomes modified characteristics plant growth and development stress responses PTM crosstalk