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Computational investigation on hydrodynamic and sediment transport responses influenced by reclamation projects in the Meizhou Bay,China

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Frontiers of Earth Science 2020年第3期14卷 493-511页

作者： Gefei Deng Yongming Shen changping li Jun Tang Institute of Environmental and Ecological Engineering Guangdong University of TechnologyGuangzhou510006China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116024China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan523808China

Reclamation projects are the main method of coastal exploitation,and the hydrodynamic environmental effect,together with the sediment transport response of the reclamation project,is important to the project’s site selection and environmental ***,a 3D numerical model based on the finite volume community ocean model(FVCOM)is applied to simulate the changes in the Meizhou Bay’s hydrodynamic environment and sediment transport after a reclamation *** reclamation project greatly alters the shape of the shoreline and narrows the bay,leading to a significant change in its hydrodynamic environment and sediment *** the project,the clockwise coastal residual current in the corner above the Meizhou Island gradually *** obvious counter-clockwise coastal residual current emerges around the rectangular *** tidal prism decreases by 0.65×10^9 and 0.44×10^9 m^3 in the spring and neap tides,*** residence time presents a major *** changes lead to the weakening of the water exchange capacity and the reduction of the self-purification capacity of the *** in the tidal channel weaken,whilst currents in the horizontal channel *** strength and scope of particle trajectories around the horizontal channel and the Meizhou Island *** suspended sediment concentration(SSC)increases in the majority of the Meizhou Bay but decreases in the lateral *** eastern corner of Z2 shows a tendency to *** western region of the Meizhou Island,the upper portion of the rectangular corner and the western corner of Z4 show a tendency to *** reclamation project increases the maximum storm surges by 0.06 m and decreases the maximum significant wave heights by 0.09 m.

关键词： Meizhou Bay FVCOM-h SWAN reclamation project hydrodynamic environment SSC typhoon

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Finite Eement Facture Aalysis of the Main Arm of Tower Cranes with the 3-D Cracks

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上海交通大学学报 2004年第Z2期38卷 171-175页

作者： Zongjie Cao Zhenbang Kuang changping li Department of Engineering Mechanics Shanghai Jiaotong University Shanghai200240 China Department of Mechanical Engineering Aeronautic University of Air ForceChangchun 130022 China Department of Engineering Mechanics Shanghai Jiaotong University Shanghai200240 China Department of Mechanical Engineering Aeronautic University of Air ForceChangchun 130022 China

In this paper the local solutions of displacement fields in front of three-dimensional cracks are introduced and a new singular element of three-dimensional crack problems is constructed, and a new method for calculating stress intensity factors of three-dimensional crack problems is presented. With the present method, the structural strength of with longitudinal closed cracks under axial tensions is analyzed. It is possible for the crack to propagate because there are ring tensile stresses near joints of the main arm in tower cranes under axial press stresses. The stress and the stress intensity factor are calculated at joints on the main arm of tower cranes. Influences of welding residual stress on stress intensity factors and stresses are discussed.

关键词： stress intensity factor residual stress singular finite element crack

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Water permeability in MXene membranes: Process matters

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Chinese Chemical Letters 2020年第6期31卷 1665-1669页

作者： Hang Zhou Yuwei Wang Fuqiang Wang Hao Deng Yongchen Song changping li Zheng ling Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy&Power EngineeringDalian University of TechnologyDalian 116024China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808China

Recent studies have shown impressive transport behaviors of water and ions within lamellar MXene membranes,which endows great promise in developing advanced separation application based high performance MXene ***,most of the researches focused on modification of MXene nanoflakes and optimizing interlayer distance,leaving the impact of membrane fabrication process *** this work,we studied the water flux of membranes made by vacuum filtration using delaminated MXene nanoflakes as the *** results show that the water permeability is extremely sensitive to the process,especially at the drying process,loading and deposit rate of nanoflakes(the feeding concentration).We find that the voids from less ordered stack rather than in-plane defects and interlayer galleries contribute to the large water *** voids can be effectively avoided via deposition of MXene nanoflakes at a slow *** the stack of MXene nanoflakes during vacuum filtration and drying are critical for development of MXene membranes with desired performance for water permeation.

关键词： Exfoliation MXene Two-dimensional materials Water permeability Water treatment

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Bimetallic Ni-Co MOF@PAN modified electrospun separator enhances high-performance lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第7期82卷 484-496,I0010页

作者： Xiaolong Leng Jie Zeng Mingdai Yang changping li S.V.Prabhakar Vattikuti Jielin Chen Shuang li Jaesool Shim Tong Guo Tae Jo Ko School of Mechanical Engineering Yeungnam UniversityGyeongsangbuk-do 38541Republic of Korea College of Mechanical and Electrical Engineering Hunan University of Science and TechnologyXiangtan 411201HunanChina Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and TechnologyNanjing 210094JiangsuChina

lithium-sulfur(li-S)batteries with high energy density are considered promising energy storage devices for the next ***,the shuttle effect and the passive layer between the separator and the electrodes still seriously affect the cycle stability and ***,a bimetallic Ni-Co metal-organic framework(MOF)with adsorption and catalytic synergism for polysulfides was successfully synthesized as an electrospinning separator sandwich for li-S *** porous Ni-Co MOF coatings into the separator provides more adsorption catalytic sites for polysulfides,prevents their diffusion to the anode,and enhances sulfur ***,the improved li-S batteries with a Ni-Co MOF@PAN(NCMP)electrospun separator delivered excellent rate performance and outstanding cycle stability,yielding an ultra-high initial capacity of 1560 mA h g^(-1)at 0.1 ***,remarkable li-S battery performance with a discharge capacity of 794 mA h g^(-1)(84.1%capacity retention)was obtained after500 cycles,while delivering a low capacity decay rate of 0.032%during long-term cycling(up to 500cycles)at 1 ***,even at the current density of 2 C,the capacity attenuation rate of 2000 cycles is only 0.034%per *** addition,compared with the Celgard separator,the NCMP separator also had high thermal stability(keeping the separator outline at 200℃)that ensured battery safety and excellent electrolyte wettability(73%porosity and 535%electrolyte absorption)and significantly enhanced the ionic conductivity and li^(+) transfer number,and protected the surface integrity of the anode.

关键词： li-S batteries Ni-Co MOF Adsorption catalysis Synergistic effect

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Progress in electrocatalytic nitrate reduction for green energy:Catalyst engineering,mechanisms,and techno-economic feasibility

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Journal of Energy Chemistry 2024年第8期95卷 380-406,I0009页

作者： Hafiz Muhammad Adeel Sharif Hafiz Muhammad Farooq Khan Sadeeq Ullah Yuwei Wang Muhammad Ahmad Bo Yang changping li Muhammad Bilal Asif Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina College of Chemistry and Engineering Shenzhen UniversityShenzhen 518060GuangdongChina FMH College of Medicine and Dentistry LahorePakistan School of Environment and Civil Engineering Research Center for Eco-Environment EngineeringDongguan University of TechnologyDongguan 523106GuangdongChina Advanced Membranes and Porous Materials Center(AMPMC) Physical Sciences and Engineering(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955Saudi Arabia

Ammonia(NH_(3))is an irreplaceable chemical that has been widely demanded to keep the sustainable development of modern ***,its industrial production consumes a huge amount of energy and releases extraordinary greenhouse gases(GHGs),leading to various environmental *** the green production of ammonia is a great challenge,which has been extensively pursued in the last *** this review,the most promising strategy,electrochemical nitrate reduction reaction(e-NO_(3)RR),is comprehensively investigated to give a complete understanding of its development and mechanism and provide guidance for future ***,owing to the complex reactions and limited selectivity,a comprehensive understanding of the mechanisms is crucial to further development and ***,NO_(3)^(-)RR is a promising strategy for simultaneous water treatment and NH_(3)production.A detailed overview of the recent progress in NO_(3)^(-)RR for NH_(3)production with nontransition and transition metal based electrocatalysts is *** addition,critical advanced techniques,future challenges,and prospects are discussed to guide future research on transition metal-based catalysts for commercial NH_(3)synthesis by NO_(3)^(-)reduction.

关键词： Nitrate reduction Electrolysis Pollution to solution Transition metal catalysts Ammonia synthesis Green energy

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Innovation and Income

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ChinAfrica 2012年第3期4卷 10-11页

作者： li changping

In China,the first document issued in a given year by the Central Committee of the Communist Party of China and the State Council is referred to as the ＂No.1 Central Document.＂ 2012 marks the ninth consecutive year in which this document has focused on rural problems,and also its first time addressing agricultural science and technology *** changping,a researcher with the Rural Development and Construction Research Center of Hebei University,believes that scientific and technological innovation is a double-edged sword for *** thoughts are as follows：

关键词： Innovation and Income

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Chromatin architectural alterations due to null mutation of a major CG methylase in rice

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Journal of Integrative Plant Biology 2022年第12期64卷 2396-2410页

作者： Jinbin Wang Xiaochong li Qianli Dong changping li Juzuo li Ning li Baoxu Ding Xiaofei Wang Yanan Yu Tianya Wang Zhibin Zhang Yiyang Yu Man Lang Zixian Zeng Bao liu Lei Gong Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBejig 100101China Hainan Yazhou Bay Seed Lab Sanya 572025China Department of Biological Science College of Life ScienceSichuan Normal UniversityChengdu 610101China

Associations between 3D chromatin architectures and epigenetic modifications have been characterized in ***,any impact of DNA methylation on chromatin architecture in plants is understudied,which is confined to Arabidopsis *** plant species differ in genome size,composition,and overall chromatin packing,it is unclear to what extent findings from *** hold in other ***,the incomplete chromatin architectural profiles and the low-resolution high-throughput chromosome conformation capture(Hi-C)data from *** have hampered characterizing its subtle chromatin structures and their associations with DNA *** constructed a high-resolution Hi-C interaction map for the null OsMET1-2(the major CG methyltransferase in rice)mutant(osmet1-2)and isogenic wild-type rice(WT).Chromatin structural changes occurred in osmetl-2,including intra-/inter-chromosomal interactions,compartment transition,and topologically associated domains(TAD)*** findings provide novel insights into the potential function of DNA methylation in TAD formation in rice and confirmed DNA methylation plays similar essential roles in chromatin packing in A,thaliana and rice.

关键词： 3D chromatin architectures DNA methylation Hi-C osmet1-2 mutant

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Discharge Current Filtering of High Voltage Pulse Power Supply Based on Singular Value Decomposition of Toeplitz Matrix

Discharge Current Filtering of High Voltage Pulse Power Supp...

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第40届中国控制会议

作者： Yang Yang li changping School of Automation Wuhan University of Technology School of Mechanical Engineering and Electronic Information China University of Geosciences

In the process of rock breaking by high-voltage pulse power supply discharging,the peak voltage can reach 200 kV and the maximum discharge energy is about 400 *** discharge current signal is the key factor to establish the equivalent circuit model of *** to strong electromagnetic interference,the discharge current signals of different rock samples breaking contain noise *** at the problems of complex interference and serious burr of discharge current signal,a filtering algorithm based on singular value decomposition（SVD） of Toeplitz matrix is ***,the Toeplitz matrix of the original discharge current signal is constructed,and then the singular value decomposition for Toeplitz matrix is carried out,and the effective current signal is reconstructed by inverse operation of singular value *** simulation results show that the smooth current signal can be obtained after filtering,with low computational complexity.

关键词： Toeplitz matrix SVD High-voltage pulse power Discharge current Filtering

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从资源整理到知识管理再到文化育人——论高校档案的管理创新与功能拓展

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档案与建设 2013年第8期 25-27页

作者：李长萍深圳职业技术学院广东深圳518055

传统高校档案工作主要收集整理各类文档,对外服务面也非常有限。在新形势下,高校档案应努力向知识管理转型,发掘档案的知识功能,"盘活"档案,主动走出去为一线教学科研服务,拓展档案知识的育人功能,直接参与人才培育工作。要实现档案管... 详细信息

传统高校档案工作主要收集整理各类文档,对外服务面也非常有限。在新形势下,高校档案应努力向知识管理转型,发掘档案的知识功能,"盘活"档案,主动走出去为一线教学科研服务,拓展档案知识的育人功能,直接参与人才培育工作。要实现档案管理的提升与功能的转变,高校档案部门应建设学习型组织,加强档案信息资源整合,加强网络等新技术引进应用。

关键词：高校档案知识管理育人

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Potential effect of hepatitis C Virus non-structural protein 4B on liver carcinogenesis

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Journal of Nanjing Medical University 2006年第6期20卷 387-391页

作者： Xia Chen changping li Zhongqiong Wang Guanghong DU Deparment of Digestive disease Affiliated hospital of Luzhou Medical College Luzhou 646000China

Objective：To investigate the effect of hepatitis C virus non-structural protein 4B（HCV NS4B） on c-Myc, P53, ras gene expression＂ and apoptosis in hepatic cells and study the possible role that NS4B played in the carcinogenesis of heparoma. Methods： The recombinant plasmid（PCXN2-NS4B, PCXN2-P53） and the empty, vector were transfected or co-transfected into Chang liver cells with liposome. Screening was performed with G418. Plasmid mRNA was detected by RT-PCR. The pro rein expressions of c-Myc and ras genes were analyzed by immunocytochemistry. The expressions of wild-type P53 （wtp53） gene were detected by in situ hybridization. TUNEL（flow cytometry） was used for assessing the rate of apoptosis. Results：No expression of c-Myc gene was found in PCXN2 group. The expression of c-Myc gene in NS4B group was 21.3% ＋ 1.2%. The ex pression of ras gene in PCXN2 group was lower than that in NS4B group. Compared with PCXN2 group, the expression of P53 mRNA was not promoted or inhibited in NS4B group. But the expression of P53 mRNA in NS4B-P53 group was lower than that in P53 group. In PCXN2, NS4B, P53 and NS4B-P53 group, the rates of apoptosis were 17.02% ± 1.24%, 11.94% ± 2.24%, 25.84% ± 3.49% and 18.34% ± 1.55% respectively. Conclusion ：HCV NS4B induces the expression of c-Myc and ras gene. HCV NS4B may play a role in the inhibition of cell death through P53-dependent manner. Results from this study suggested that HCV NS4B might contribute to the viral carcinogenesis.

关键词： non-structural protein 4B tumor suppressor gene oncogene apoptosis

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