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59篇 您的检索式:作者名="Jiming Hu"
    题名 作者 年代 出处 被引量
1Air pollutants contribution and control strategies of energy-use related sources in Beijing显示文摘Based on the statistical analysis of emission inventory and ISCST3 model simulation, the emission and ambient concentration contributions of energy-use related sources to the major pollutants of SO2, NOx and PM10 in urban areas of Beijing were analyzed. The SO2 emission contributions of coal burning in power plants, industrial and heating sectors were 49%, 26% and 24% respectively. The vehicle exhaust contributed 74% of the NOx concentration. As to PM10, the industrial sector was the largest emission (28%) and concentration (21%) contributor despite of the fugitive sources. The source emission contributions of VOC and NH3, which greatly influence the generation of secondary pollutants, were discussed as well. This paper also analyzed the control strategies of energy consumption and vehicle sources, based on which the control scenario in 2008 was established and the change of emission and concentration contribution were estimated. The results show that the cleaner energy use, industrial structure improvement, transportation mode modification and single vehicle emission control will greatly improve air quality. The industrial sector will change to the largest contributor of SO2 and as to NOx, vehicle emission control is still important.HAO Jiming WANG Litao LI Lin HU Jingnan YU Xuechun 2005Science China Earth Sciences2005,48,z2:24
2Real-world fuel efficiency and exhaust emissions of light-duty diesel vehicles and their correlation with road conditions显示文摘The real-world fuel efficiency and exhaust emission profiles of CO, HC and NOx for light-duty diesel vehicles were investigated. Using a portable emissions measurement system, 16 diesel taxies were tested on different roads in Macao and the data were normalized with the vehicle specific power bin method. The 11 Toyota Corolla diesel taxies have very good fuel economy of (5.9 ± 0.6) L/100 km, while other five diesel taxies showed relatively high values at (8.5 ± 1.7) L/100 km due to the variation in transmission systems and emission control strategies. Compared to similar Corolla gasoline models, the diesel cars confirmed an advantage of ca. 20% higher fuel efficiency. HC and CO emissions of all the 16 taxies are quite low, with the average at (0.05 ± 0.02) g/km and (0.38 ± 0.15) g/km, respectively. The average NOx emission factor of the 11 Corolla taxies is (0.56 ± 0.17) g/km, about three times higher than their gasoline counterparts. Two of the three Hyundai Sonata taxies, configured with exhaust gas recirculation (EGR) + diesel oxidation catalyst (DOC) emission control strategies, indicated significantly higher NO2 emissions and NO2/NOx ratios than other diesel taxies and consequently trigger a concern of possibly adverse impacts on ozone pollution in urban areas with this technology combination. A clear and similar pattern for fuel consumption and for each of the three gaseous pollutant emissions with various road conditions was identified. To save energy and mitigate CO2 emissions as well as other gaseous pollutant emissions in urban area, traffic planning also needs improvement.Jingnan Hu Ye Wu Zhishi Wang Zhenhua Li Yu Zhou Haitao Wang Xiaofeng Bao Jiming Hao 2012Journal of Environmental Sciences2012,24,5:14
3PandaX: a liquid xenon dark matter experiment at CJPL显示文摘PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,8:9
4Role of ammonia in forming secondary aerosols from gasoline vehicle exhaust显示文摘Ammonia(NH3) plays vital roles in new particle formation and atmospheric chemistry. Although previous studies have revealed that it also influences the formation of secondary organic aerosols(SOA) from ozonolysis of biogenic and anthropogenic volatile organic compounds(VOCs), the influence of NH3 on particle formation from complex mixtures such as vehicle exhausts is still poorly understood. Here we directly introduced gasoline vehicles exhausts(GVE) into a smog chamber with NH3 absorbed by denuders to examine the role of NH3 in particle formation from GVE. We found that removing NH3 from GVE would greatly suppress the formation and growth of particles. Adding NH3 into the reactor after 3 h photo-oxidation of GVE, the particle number concentration and mass concentrations jumped explosively to much higher levels, indicating that the numbers and mass of particles might be enhanced when aged vehicle exhausts are transported to rural areas and mixed with NH3-rich plumes. We also found that the presence of NH3 had no significant influence on SOA formation from GVE. Very similar oxygen to carbon(O:C) and hydrogen to carbon(H:C) ratios resolved by aerosol mass spectrometer with and without NH3 indicated that the presence of NH3 also had no impact on the average carbon oxidation state of SOA from GVE.Tengyu Liu Xinming Wang Wei Deng Yanli Zhang Biwu Chu Xiang Ding Qihou Hu Hong He Jiming Hao 2015Science China Chemistry2015,58,9:7
5Reconstruction of a hybrid nucleoside antibiotic gene cluster based on scarless modification of large DNA fragments显示文摘Genetic modification of large DNA fragments(gene clusters) is of great importance in synthetic biology and combinatorial biosynthesis as it facilitates rational design and modification of natural products to increase their value and productivity.In this study,we developed a method for scarless and precise modification of large gene clusters by using RecET/RED-mediated polymerase chain reaction(PCR) targeting combined with Gibson assembly.In this strategy,the biosynthetic genes for peptidyl moieties(HPHT) in the nikkomycin biosynthetic gene cluster were replaced with those for carbamoylpolyoxamic acid(CPOAA)from the polyoxin biosynthetic gene cluster to generate a^40 kb hybrid gene cluster in Escherichia coli with a reusable targeting cassette.The reconstructed cluster was introduced into Streptomyces lividans TK23 for heterologous expression and the expected hybrid antibiotic,polynik A,was obtained and verified.This study provides an efficient strategy for gene cluster reconstruction and modification that could be applied in synthetic biology and combinatory biosynthesis to synthesize novel bioactive metabolites or to improve antibiotic production.Jiming Zhuo Binbin Ma Jingjing Xu Weihong Hu Jihui Zhang Huarong Tan Yuqing Tian 2017Science China(Life Sciences)2017,60,9:6
6Kernel matrix learning with a general regularized risk functional criterion显示文摘Kernel-based methods work by embedding the data into a feature space and then searching linear hypothesis among the embedding data points. The performance is mostly affected by which kernel is used. A promising way is to learn the kernel from the data automatically. A general regularized risk functional (RRF) criterion for kernel matrix learning is proposed. Compared with the RRF criterion, general RRF criterion takes into account the geometric distributions of the embedding data points. It is proven that the distance between different geometric distributions can be estimated by their centroid distance in the reproducing kernel Hilbert space. Using this criterion for kernel matrix learning leads to a convex quadratically constrained quadratic programming (QCQP) problem. For several commonly used loss functions, their mathematical formulations are given. Experiment results on a collection of benchmark data sets demonstrate the effectiveness of the proposed method.Chengqun Wang Jiming Chen Chonghai Hu Youxian Sun 2010Journal of Systems Engineering and Electronics2010,21,1:3
7Effect of aging treatment on microstructure and corrosion behavior of Al-Zn-Mg aluminum alloy in aqueous solutions with different aggressive ions显示文摘The microstructure and corrosion behavior of Al-Zn-Mg alloy(namely 7×××)after natural aging treatment(NAT)and artificial aging treatment(AAT)in aqueous NaCl solutions containing different aggressive ions have been investigated in current work.Results of microstructure characterization demonstrate that the aging treatment has a great influence on the grain size and precipitates.The grain size is relatively sizeable and no evident precipitates are observed in alloy after NAT comparable with that after AAT.The electrochemical corrosion behavior of alloy was studied by polarization curve and electrochemical impedance spectroscopy(EIS).The corrosion potential(E_(corr))of the aluminum alloy is more negative in 3.5 wt.%NaCl containing 0.052 wt.%NaHSO_(3)solution than that in 3.5 wt.%NaCl solutions with or without 0.907 wt.%NaHCO_(3).Charge transfer resistance(Rct)results reveal that alloy after AAT has an enhancement of corrosion resistance compare with that after NAT.With the immersion time increasing,mostly pitting spreads over the surface of the alloy only in NaCl solution,whereas exfoliation corrosion mainly occurs in NaCl solutions containing NaHSO_(3)or NaHCO_(3).Pan Liu Lulu Hu Qinhao Zhang Cuiping Yang Zuosi Yu Jianqing Zhang Jiming Hu Fahe Cao 2021Journal of Materials Science & Technology2021,,5:3
8Recent progress in Chinese fusion research based on superconducting tokamak configuration显示文摘Fusion energy is a promising source of clean energy,which could solve energy shortages and environmental pollution.Research into controlled fusion energy has been ongoing for over half a century.China has created a clear roadmap for magnetic confinement fusion development,where superconducting tokamaks will be used in commercial fusion reactors.The Experimental Advanced Superconducting Tokamak(EAST)is the world’s first fully superconducting tokamak with upper and lower divertors,which aims at longpulse,steady-state,H-mode operation,and 101-s H-mode discharge had been achieved.In 2007,China joined the International Thermonuclear Experimental Reactor(ITER)and became one of its seven members.Thirteen procurement packages are undertaken by China,covering superconducting magnets,power supplies,plasma-facing components(PFCs),diagnostics,etc.To bridge the gap between the ITER and fusion demonstration power plants(DEMOs),China is planning to build the Chinese Fusion Engineering Testing Reactor(CFETR)to demonstrate related technologies and physics models.The engineering design of the CFETR was completed in 2020,and Comprehensive Research Facilities for Fusion Technology(CRAFT)are being constructed to explore the key technologies used in the CFETR.Jinxing Zheng Jinggang Qin Kun Lu Min Xu Xuru Duan Guosheng Xu Jiansheng Hu Xianzu Gong Qing Zang Zhihong Liu Liang Wang Rui Ding Jiming Chen Pengyuan Li Lei Xue Lijun Cai Yuntao Song 2022The Innovation2022,3,4:3
9Insight into the triggering effect of(Al,Mg,Ca,Mn)-oxy-sulfide inclusions on localized corrosion of weathering steel显示文摘The surface properties of weathering steel(WS)is very important for its service performance and safety,and the localized corrosion induced by inclusions is closely related to the surface properties of WS and its application.In the current work,a common spherical(Al,Mg,Ca,Mn)-oxy-sulfide inclusion was selected to investigate the corrosion evolution of complex inclusion and its effect on localized corrosion on WS surface.The results indicate the inclusion in WS consists of(Ca,Mn)sulfides part and(Ca,Al,Mg)oxides part with complex core-shell structure.Locally preferential dissolution occurs in(Ca,Mn)sulfides part as well as metal matrix around the inclusions.Furthermore,both parts of the inclusions with poor conductivity and high-density dislocation at metal matrix around the inclusions was found,which suggests that traditional micro-galvanic corrosion cell may not be the cause of inclusion-induced localized corrosion on WS surface at initial stage of corrosion.The variation in maximum and average depth around the inclusion or selected region with immersion time indicates that localized corrosion induced by inclusions is overwhelmed by uniform corrosion of WS in the latter stage of immersion,then the rust formed on WS surface consists of two layers.Pan Liu Qinhao Zhang Xinran Li Jiming Hu Fahe Cao 2021Journal of Materials Science & Technology2021,,5:2
10Design and pressure control of high-pressure differential magnetic fluid seals 显示文摘Zou Jibiu Zou Jiming Hu Jianhui 20031EEE Transactions on Magnetics2003,39,5:1
11Study of the Material Transfer Characteristics and Surface Morphology Due to Arc Erosion of PtIr Contact Materials显示文摘By means of breaking tests on PtIr contact materials via a JF04C contact material testing machine, it was attempted to elucidate the characteristics of the various surface morphology and material transfer after the arc erosion process caused by break arc. The material transfer characteristics appeared in the experiments were concluded and analyzed. Meanwhile, the morphology of the anode and cathode surface were observed and analyzed by SEM.WANG Saibei XIE Ming YANG Youcai ZHANG Jiming CHEN Yongtai LIU Manmen YANG Yunfeng HU Jieqiong CUI Hao 2012贵金属2012,33,A01:1
12显示文摘Hu Jiming Liu Liang Zhang Jianqing 2007Progress in Organic Coatings2007,58,4:1
13Sequence analysis and typing of Saprolegnia strains isolated from freshwater fish from Southern Chinese regions显示文摘Saprolegniasis,caused by Saprolegnia infection,is one of the most common diseases in freshwater fish.Our study aimed to determine the epidemiological characteristics of saprolegniasis in Chinese regions of high incidence.Saprolegnia were isolated and identified by morphological and molecular methods targeting the internal transcribed spacer(ITS)ribosomal DNA(rDNA)and building neighbor-joining(NJ)and maximum parsimony(MP)phylogenetic trees.The ITS sequences of eight isolated strains were compared with GenBank sequences and all strains fell into three clades:CLADE1(02,LP,04 and 14),CLADE2(S1),and CLADE3(CP,S2,L5 and the reference ATCC200013).Isolates 02 and LP shared 80%sequence similarity with S.diclina,S.longicaulis,S.ferax,S.mixta,and S.anomalies.Further,isolates 04 and 14 shared 80%similarity with S.bulbosa and S.oliviae.Finally,extremely high ITS sequence similarities were identified between isolates S1 and S.australis(100%);CP and S.hypogyna(96%);and S2,L5,ATCC200013 and S.salmonis(98%).This research provides insights into the identification,prevention and control of saprolegniasis pathogens and the potential development of effective drugs.Siya Liu Pengpeng Song Renjian Ou Wenhong Fang Mao Lin Jiming Ruan Xianle Yang Kun Hu 2017Aquaculture and Fisheries2017,2,5:1
14Electrodeposition of silane films on aluminum alloys for corrosion pro tection显示文摘Hu Jiming Liu Liang Zhang Jianqing Cao Chunan 2007Progress in Organic Coatings2007,58,:1
15Resolving overlapped spectra with curve fitting显示文摘Hu Yaogai Li Wei Jiming Hu 2005Spectrochimica Acta (Part A)2005,62,13:1
16Resolving overlapped spectra with curve fitting显示文摘HU Yaogai LI Wei HU Jiming 2005Spectrochim Acta A Mol Biomol Speclrosc2005,62,:1
17A TDDFT and PCM-TDDFT studies on absorption spectra of N -substituted 1,8-naphthalimides dyes显示文摘Lifen Miao Yali Yao Feng Yang Zhengdong Wang Wei Li Jiming Hu 2008Journal of Molecular Structure: THEOCHEM2008,,1:1
18Studies of water transport behavior and importance models of epoxy-coated metals in NaCl solution by EIS显示文摘Zhang Jintao Hu Jiming Zhang Jianqing 2004Progress in Organic Coatings2004,,51:1
19Improving the formation and protective properties of silane films by the combined use of electrodeposition and nanoparticles incorporation显示文摘Liu Liang Hu Jiming Zhang Jianqing 2006Electrochimica Acta2006,52,2:1
20Air quality impacts of power plant emissions in Beijing显示文摘Jiming Hao Litao Wang Minjia Shen Lin Li Jingnan Hu 2006Environmental Pollution2006,,2:1
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