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45篇 您的检索式:作者名="Chengming Chen"
    题名 作者 年代 出处 被引量
1Theory of annual runoff evolution under natural-artificial dual mode and case study of Wuding River basin on the middle Yellow River显示文摘Water cycling process in a river basin becomes more complicated because of the intensified impact by human activities. Study of the law of annual runoff evolution in a river basin is of great significance to quantitative analysis of the water resources condition in varied environment and prediction of the law of the water resources evolution in the future because year-based time span may best reflect the law of the water resources evolution driven by the nature and human activities in the river basin. This paper advances the theory of annual runoff evolution under natural-artificial dual mode based on the dual mode of the water resources evolution, and the theory is applied for the Wuding River Basin on the middle Yellow River as a case study. A thorough analysis of the precipitation-runoff relationship is made in the case of dynamic variation of ground surface conditions of the Wuding River basin, and the concept of water-soil conservation index area that indicates adoption of various measures for water and soil conservation to reflect ground surface conditions. Furthermore, precipitation-runoff empirical model is developed to reflect dynamic variation of the ground surface conditions of the river basin. The study may lay a solid foundation for the integrated theoretical platform of the law of the water resources evolution in the Yellow River basin and the dual model of the evolution.WANG Hao WANG Chengming WANG Jianhua ZHOU Zuhao CHEN Yiming 2004Science China(Technological Sciences)2004,47,z1:8
2Corrosion resistance properties of AZ31 magnesium alloy after Ti ion implantation显示文摘Magnesium alloys have a wide range of applications in industry; however, their corrosion resistance, wear resistance, and hardness are rather poor, which limit their applications. Ti ion was implanted into the AZ31 magnesium alloy surface by metal vapor vacuum arc (MEVVA) implanter. This metal arc ion source has a broad beam and high current capabilities. The implantation energy was fixed at 45 keV and the dose was at 9 × 1017 cm?2. Through ion implantation, Ti ion implantation layer with approximately 900 nm in thickness was directly formed on the surface of AZ31 magnesium alloy, by which its surface property greatly improved. The chemical states of some typical elements of the ion implantation layer were analyzed by means of X-ray photoelectron spectroscopy (XPS), while the cross sectional morphology of the ion im-plantation layer and the phase structure were observed by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). The property of corrosion resistance of the Ti ion implanted layer was studied by the CS300P electrochemistry corrosion workstation in 3.5% NaCl solution. The results showed that the property of corrosion resistance was enhanced remarkably, while the corrosion velocity was obviously slowed down.CHEN Fei ZHOU Hai CAI Suo LV Fanxiu LI Chengming 2007Rare Metals2007,26,2:4
3A targeted sequencing approach to find novel pathogenic genes associated with sporadic aortic dissection显示文摘Aortic dissection(AD) is a heterogeneous genetic disease of the aorta with high mortality and poor prognosis. However, only few genetic causes of AD have been explored till date. After conducting a broad literature review focused on identifying potential pathogenic pathways, we designed a panel containing 152 AD-associated genes to conduct massively parallel targeted nextgeneration sequencing of 702 sporadic aortic dissection patients and 163 matched healthy controls. After validation by Sanger sequencing, we identified 21 definitely pathogenic and 635 likely pathogenic variants in 61.25%(430/702) of patients. In these patients, 34.88%(150/430) harbored more than one variant that was either definitely or likely to be pathogenic. Among the candidate genes, we identified 546 likely pathogenic variants in 47.72%(335/702) of patients. Importantly, we identified 94 lossof-function(LOF) variants in 45 genes in AD patients, but only five LOF variants in the controls(P=1.34×10^(-4)). With a burden test, we highlighted RNF213 as an important new gene for AD pathogenesis. We also performed transcriptome sequencing of human aorta tissues to evaluate the expression levels of these newly identified genes. Our study has compiled a comprehensive genetic map of sporadic AD in the Han Chinese population. We believe it will facilitate risk predicting and genetic diagnosis of this severe disease in the future.Zongzhe Li Chengming Zhou Lun Tan Peng Chen Yanyan Cao Xianqing Li Jiangtao Yan Hesong Zeng Dao-Wu Wang Dao-Wen Wang 2018Science China(Life Sciences)2018,61,12:4
4Magnetotail dipolarization fronts and particle acceleration:A review显示文摘In this paper, the particle acceleration processes around magnetotail dipolarization fronts(DFs) were reviewed. We summarize the spacecraft observations(including Cluster, THEMIS, MMS) and numerical simulations(including MHD, testparticle, hybrid, LSK, PIC) of these processes. Specifically, we(1) introduce the properties of DFs at MHD scale, ion scale, and electron scale,(2) review the properties of suprathermal electrons with particular focus on the pitch-angle distributions,(3)define the particle-acceleration process and distinguish it from the particle-heating process,(4) identify the particle-acceleration process from spacecraft measurements of energy fluxes, and(5) quantify the acceleration efficiency and compare it with other processes in the magnetosphere(e.g., magnetic reconnection and radiation-belt acceleration processes). We focus on both the acceleration of electrons and ions(including light ions and heavy ions). Regarding electron acceleration, we introduce Fermi,betatron, and non-adiabatic acceleration mechanisms;regarding ion acceleration, we present Fermi, betatron, reflection, resonance, and non-adiabatic acceleration mechanisms. We also discuss the unsolved problems and open questions relevant to this topic, and suggest directions for future studies.Huishan FU Elena EGRIGORENKO Christine GABRIELSE Chengming LIU San LU KJHWANG Xuzhi ZHOU Zhe WANG Fang CHEN 2020Science China Earth Sciences2020,63,2:4
5Variants of genes encoding collagens and matrix metalloproteinase system increased the risk of aortic dissection显示文摘Aortic dissection(AD) is a devastating,heterogeneous condition of aorta.The homeostasis between collagens and matrix metalloproteases(MMPs)/tissue inhibitors of MMPs(TIMPs) system in the extracellular matrix plays an important role for structure and functions of aorta.However,our knowledge on association between variants of genes in this system and pathogenesis of AD is very limited.We analyzed all yet known coding human genes of collagens(45 genes),MMPs/TIMPs(27genes) in 702 sporadic AD patients and in 163 matched healthy controls,by using massively targeted next-generation and Sanger sequencing.To define the pathogenesis of potential disease-causing candidate genes,we performed transcriptome sequencing and pedigree co-segregation analysis in some genes and generated Col5a2 knockout rats.We identified 257 pathogenic or likely pathogenic variants which involved 88.89%(64/72) genes in collagens-MMPs/TIMPs system and accounted for 31.05%(218/702) sporadic AD patients.In them,84.86%patients(185/218) carried one variant,12.84%two variants and 2.30%more than two variants.Importantly,we identified 52 novel probably pathogenic loss-of-function(LOF) variants(20 nonsense,16 frameshift,14 splice sites,one stop-loss,one initiation codon) in 11.06%(50/452) AD patients,which were absent in 163controls(P=2.5×10^(-5)).Transcriptome sequencing revealed that identified variants induced dyshomeostasis in expression of collagens-TIMPs/MMPs systems.The Col5α2^(-/-) rats manifested growth retardation and aortic dysplasia.Our study provides a first comprehensive map of genetic alterations in collagens-MMPs/TIMPs system in sporadic AD patients and suggests that variants of these genes contribute largely to AD pathogenesis.Zongzhe Li Chengming Zhou Lun Tan Peng Chen Yanyan Cao Chenze Li Xianqing Li Jiangtao Yan Hesong Zeng Dao-Wu Wang Dao-Wen Wang 2017Science China(Life Sciences)2017,60,1:4
6Elastic Scattering of 7Be on Pb Target显示文摘Yang Yanyun Wang Jiansong Wang Qi Huang Meirong Ma Junbing Ma Peng Cao Xiguang Han Jianlong Bai Zhen Jin Shilong Hu Qiang Jin Lei Chen Jiangbo Zhang Xueying Chen Ruofu Hu Zhengguo Xu Shiwei Zhen Chuan Xu Zhiguo Xu Hushan Duan Liming Sun Zhiyu Chen Zhiqiang He Jianjun Li Songlin Lei Xiangguo Fu Fen Zhang Xueheng Yuan Xiaohua Du Chengming Yan Xinshuang Hu Jun Tang Shuwen Ye Ruiping Yang Kun Shi Fudong Zhang Wei Chen Ze Li Long Xu Xing Liu Longxiang Zhang Liyong Lin Qingyun Gou Boxing Xu Ge Zhou Xionghong Zhang Yuhu Xiao Guoqing 2011IMP & HIRFL Annual Report2011,,1:4
7Predicting future dynamics from short-term time series using an Anticipated Learning Machine显示文摘Predicting time series has significant practical applications over different disciplines.Here,we propose an Anticipated Learning Machine(ALM)to achieve precise future-state predictions based on short-term but high-dimensional data.From non-linear dynamical systems theory,we show that ALM can transform recent correlation/spatial information of high-dimensional variables into future dynamical/temporal information of any target variable,thereby overcoming the small-sample problem and achieving multistep-ahead predictions.Since the training samples generated from high-dimensional data also include information of the unknown future values of the target variable,it is called anticipated learning.Extensive experiments on real-world data demonstrate significantly superior performances of ALM over all of the existing 12 methods.In contrast to traditional statistics-based machine learning,ALM is based on non-linear dynamics,thus opening a new way for dynamics-based machine learning.Chuan Chen Rui Li Lin Shu Zhiyu He Jining Wang Chengming Zhang Huanfei Ma Kazuyuki Aihara Luonan Chen 2020National Science Review2020,7,6:3
8IMPROVING 9-INTERSECTION MODEL BY REPLACING THE COMPLEMENT WITH VORONOI REGION显示文摘intersection model is the most popular framework used for formalizing the spatial relations between two spatial objects A and B. It transforms the topological relation- ships between two simple spatial Objects A and B into point-set topology problem in terms of the intersections of A’s boundary ( A), interior (A0) and exterior (A - ) with B’s bound- ary ( B), interior (B0) and exterior (B - ). It is shown in this paper that there exist some limitations of the original 9-intersection model due to its definition of an object’s exterior as its complement,and it is difficult to distinguish different disjoint relations and relations be- tween complex objects with holes, difficult or even impossible to compute the intersections with the two object’s complements ( A B -, A0 B -, A - B, A - B0 and A - B - )since the complements are infinitive. The authors suggest to re-define the exterior of spa- tial object by replacing the complement with its Voronoi region. A new Voronoi-based 9-in- tersection (VNI) is proposed and used for formalizing topological relations between spatial objects. By improving the 9-interscetion model, it is now possible to distinguish disjoint rela- tions and to deal with objects with holes. Also it is possible to compute the exterior-based in- tersections and manipulate spatial relations with the VNI.CHEN Jun LI Chengming LI Zhilin Gold C M 2000Geo-Spatial Information Science2000,3,1:2
9Effects of free-air CO_2 enrichment on adventitious root development of rice under low and normal soil nitrogen levels显示文摘Free air CO2 enrichment(FACE) and nitrogen(N) have marked effects on rice root growth,and numerical simulation can explain these effects. To further define the effects of FACE on root growth of rice, an experiment was performed, using the hybrid indica cultivar Xianyou63. The effects of increasing atmospheric CO2 concentration [CO2], 200 μmol mol-1higher than ambient, on the growth of rice adventitious roots were evaluated, with two levels of N: low(LN, 125 kg ha-1) and normal(NN, 250 kg ha-1). The results showed a significant increase in both adventitious root number(ARN) and adventitious root length(ARL) under FACE treatment. The application of nitrogen also increased ARN and ARL, but these increases were smaller than that under FACE treatment. On the basis of the FACE experiment, numerical models for rice adventitious root number and length were constructed with time as the driving factor. The models illustrated the dynamic development of rice adventitious root number and length after transplanting, regulated either by atmospheric [CO2] or by N application.The simulation result was supported by statistical tests comparing experimental data from different years, and the model yields realistic predictions of root growth. These results suggest that the models have strong predictive potential under conditions of atmospheric [CO2] rises in the future.Chengming Sun Lijian Wang Tao Liu Doudou Guo Yingying Chen Wei Wu Yulong Wang Jianguo Zhu 2014The Crop Journal2014,2,4:2
10A research in supply chain profit allocation based on cooperation game theory显示文摘Leilei Chen Miaomiao Shen Chengming Chen 2010International Conference on System Science2010,4,10:1
11Thermal Stress in Free-standing Diamond Films with Cr Interlayer Destroyed显示文摘Thermal stress in large area free-standing diamond films was remarkable during the post-deposition cooling of direct current (DC) arc plasma jet chemical vapor deposition (CVD) process.In this research,the stress release caused by delamination of Cr interlayer was of great importance to ensure the integrity of free-standing diamond film.The effects of Cr interlayer on Mo substrate,namely composite substrate,on thermal stress were investigated.Thermo-mechanical coupling analysis of the thermal stress was applied by finite element analysis (FEA) using ANSYS code.It was found that the interlayer could be destroyed first by the large thermal stress,and then the stress could be released and the probability of diamond film crack initiation would be reduced.The stress concentration at the bent edge of diamond film was also discussed.In addition,diamond films deposited on Mo substrates with and without Cr interlayer were prepared by DC arc plasma jet CVD system and experimental measurements were used to characterize these films.It was found that composite substrate could be an effective method of growing free-standing crack-free diamond films by DC arc plasma jet CVD system when there is no special requirement to the film strength.Zheng Liu,Liangxian Chen,Chengming Li,Lifu Hei,Jianhua Song,Guangchao Chen,Weizhong Tang and Fanxiu Lv School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2010Journal of Materials Science & Technology2010,26,11:1
12Stability analysis of Runge-Kutta methols for non-linear delay differential equations显示文摘Huang chengming Fu Hongyuan Li Shoufu Chen Guangnan 1999B1T1999,39,:1
13Phosphate-induced interfacial electronic engineering in VPO_(4)-Ni_(2)P heterostructure for improved electrochemical water oxidation显示文摘Anodic oxygen evolution reaction(OER)is the key bottleneck for water electrolysis technique owing to its sluggish reaction kinetics.Interfacial engineering on the rationally designed heterostructure can regulate the electronic states efficiently for intrinsic activity improvement.Here,we report a co-phosphorization approach to construct a VPO_(4)-Ni_(2)P heterostructure on nickel foam with strongly chemical binding,wherein phosphate acts as electronic modifier for Ni_(2)P electrocatalyst.Profiting from the interfacial interaction,it is uncovered that electron shifts from Ni_(2)P to VPO_(4)to render valence increment in Ni species.Such an electronic manipulation rationalizes the chemical affinities of various oxygen intermediates in OER pathway,giving a substantially reduced energy barrier.As a result,the advanced VPO_(4)-Ni_(2)P heterostructure only requires an overpotential of 289 mV to deliver a high current density of 350 mA/cm^(2)for OER in alkaline electrolyte,together with a Tafel slope as low as 28 mV/dec.This work brings fresh insights into interfacial engineering for advanced electrocatalyst design.Kun Chen Keke Mao Yu Bai Delong Duan Shuangming Chen Chengming Wang Ning Zhang Ran Long Xiaojun Wu Li Song Yujie Xiong 2022Chinese Chemical Letters2022,33,1:1
14A Voronoi-based 9- intersection model for spatial relations 显示文摘Chen Jun Li Chengming Li Zhilin 2001International Journal of Geographical Information Science2001,15,3:1
15Landscape dynamic network biomarker analysis reveals the tipping point of transcriptome reprogramming to prevent skin photodamage显示文摘Skin,as the outmost layer of human body,is frequently exposed to environmental stressors including pollutants and ultraviolet(UV),which could lead to skin disorders.Generally,skin response process to ultraviolet B(UVB)irradiation is a nonlinear dynamic process,with unknown underlying molecular mechanism of critical transition.Here,the landscape dynamic network biomarker(lDNB)analysis of time series transcriptome data on 3D skin model was conducted to reveal the complicated process of skin response to UV irradiation at both molecular and network levels.The advanced l-DNB analysis approach showed that:(i)there was a tipping point before critical transition state during pigmentation process,validated by 3D skin model;(ii)13 core DNB genes were identified to detect the tipping point as a network biomarker,supported by computational assessment;(iii)core DNB genes such as COL7A1 and CTNNB1 can effectively predict skin lightening,validated by independent human skin data.Overall,this study provides new insights for skin response to repetitive UVB irradiation,including dynamic pathway pattern,biphasic response,and DNBs for skin lightening change,and enables us to further understand the skin resilience process after external stress.Chengming Zhang Hong Zhang Jing Ge Tingyan Mi Xiao Cui Fengjuan Tu Xuelan Gu Tao Zeng Luonan Chen 2021Journal of Molecular Cell Biology2021,13,11:1
16Heat Transfer Performance of Lithium Bromide Solu-tion in Falling Film Generator 显示文摘Shi Chengming Chen Qinghua Jen Tien-Chien 2010International Jour-nal of Heat and Mass Transfer2010,53,1516:1
17A Voronoi-Based 9-intersection Model for Spatial Relations显示文摘CHEN Jun LI Chengming LI Zhilin 2001International Journal of Geographical Information Systems2001,15,3:1
18A voronoi-based 9-intersection model for spatial relations显示文摘Chen J Li Chengming Li Zhilin 2001Intemational Journal of Geographical information Science2001,15,3:1
19Stability Analysis of Runge-Kutta Methods for Non-Linear Delay Differential Equations显示文摘Huang Chengming Fu Hongyuan Li Shoufu Chen Guangnan 1999Bit Numerical Mathematics1999,,2:1
20The architecture of IOT smart service system of ocean fishing vessel and its application based on petri net显示文摘Chen Chengming Yu Lijuan Ling Peiliang 2013Applied Mechanics and Materials2013,385,:1
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