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| 1 | Solvothermal-Assisted Exfoliation Process to Produce Graphene with High Yield and High Quality显示文摘Monolayer and bilayer graphene sheets have been produced by a solvothermal-assisted exfoliation process in a highly polar organic solvent,acetonitrile,using expanded graphite(EG)as the starting material.It is proposed that the dipole-induced dipole interactions between graphene and acetonitrile facilitate the exfoliation and dispersion of graphene.The facile and effective solvothermal-assisted exfoliation process raises the low yield of graphene reported in previous syntheses to 10 wt%12 wt%.By means of centrifugation at 2000 rpm for 90 min,monolayer and bilayer graphene were separated effectively without the need to add a stabilizer or modifi er.Electron diffraction and Raman spectroscopy indicate that the resulting graphene sheets are high quality products without any signifi cant structural defects. | Wen Qian Rui Hao Yanglong Hou Yuan Tian Chengmin Shen Hongjun Gao Xuelei Liang | 2009 | Nano Research2009，2，9： | 28 |
| 2 | Acute and chronic toxic effects of Pb^(2+)on polychaete Perinereis aibuhitensis:Morphological changes and responses of the antioxidant system显示文摘Perinereis aibuhitensis was used to assess adverse biological effects caused by acute and chronic Pb2+exposure in artificial seawater under controlled laboratory conditions. In 96-hr acute toxicity experiments,the morphological changes showed a positive time/dose-dependent tendency,and the 96-hr LC50 value of Pb2+was 686.41 mg/L. The responses of enzymatic and non-enzymatic antioxidants in tissues including catalase(CAT),peroxidase(POD),superoxide dismutase(SOD),glutathione peroxidase(GSH-PX),malondialdehyde(MDA) and the content of total soluble protein(TSP),were investigated on days 1,4,7 and 10 after Pb2+exposure under chronic toxicity testing. Results showed that the activation of the antioxidant system in P. aibuhitensis depended on the Pb2+concentration and the duration of exposure time.Specifically,POD and SOD activities were induced on the first day of the exposure and decreased to the control level on day 10 after exposure. Therefore,these two indexes could be used to indicate oxidative stress associated with P. aibuhitensis exposure to Pb2+. | Yulu Tian Hongjun Liu Qixiang Wang Jian Zhou Xuexi Tang | 2014 | Journal of Environmental Sciences2014，26，8： | 8 |
| 3 | Numerical simulation for erosion effects of three-phase flow containing sulfur particles on elbows in high sour gas fields显示文摘Sulfur particles carried by high-speed flow impact pipelines,which may cause equipment malfunctions and even failure.This paper investigates the scouring effect of mist gas containing sulfur particles on elbows in highly sour gas fields.The multiphase-flow hydrodynamic model of the 90elbow was established by using the computational fluid dynamics(CFD)method.The scouring effects of the gasliquid mist fluid with the water-liquid fraction of 20%and particles with the diameter of 0.01 e0.05mm on elbows were explored within the flow velocity range of 0e20 m/s.In addition,the influences of secondary collision,mean curvature radius to diameter(R/D)ratio,inertial force,drag force,and Stokes number on trajectories of sulfur particles were studied.Moreover,the influences of hydrodynamic parameters of multiphase flow on corrosion inhibitor film were analyzed with the wall shear stress as the reference value.Serious erosion mainly occurred in the extrados of elbow as well as the junction between downstream pipeline and the intrados of elbow,the maximum erosion area occurs at 61.9.When the incident position of the particle was far away from the top of the inlet plane,the probability of secondary collision became smaller.Furthermore,the erosion rate decreased with the rise in the R/D radio.The maximum erosion rate of elbow increased with the increase in the Stoke number.The maximum erosion rate reached 0.428 mm/a at 0.05mm particle diameter and 20 m/s fluid velocity.The wall shear stress increased with the increase in fluid velocity and mass flow rate of particle,the fitting function of the wall shear stress curve was the Fourier type.The results indicated that highvelocity particles had a serious erosion effect on elbows and affected the stability of the corrosion inhibitor film.The erosion effect could be retarded by controlling the velocity and diameter of particles.The results provided technical supports for the safe production in highly sour gas fields. | Enbo Zhang Dezhi Zeng Hongjun Zhu Shuanggui Li Dongbo Chen Jie Li Yanyan Ding Gang Tian | 2018 | Petroleum2018，4，2： | 5 |
| 4 | A Two-stage Robust Optimal Allocation Model of Distributed Generation Considering Capacity Curve and Real-time Price Based Demand Response显示文摘Demand response, the reactive power output of distributed generation(DG), and network reconfiguration have significant impacts on a DG allocation strategy. In this context, a novel real-time price-based demand response formulation is integrated into the allocation model of DG. The tariff is regulated by the difference between the load and active power of renewable energy. Meanwhile, network reconfiguration and the capacity curve describing the active and reactive power limits of DG are included in the optimization model for promoting the allocation of DG.With these measures, the optimal allocation model of DG is established with the goal of maximizing the net annual profit while guaranteeing the efficient utilization of renewable energy. In addition, the uncertainties of renewable energy are considered on the basis of a two-stage robust optimization method. Finally, the entire optimization model is solved by the column and constraint generation algorithm in the IEEE 33-bus distribution system and a practical 99-bus distribution system. Numerical simulations show that the proposed model is effective in terms of improving both the usage of renewable energy and net annual profit. | Shuaijia He Hongjun Gao Hao Tian Lingfeng Wang Youbo Liu Junyong Liu | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，1： | 5 |
| 5 | Identification of marine natural gases with different origin sources显示文摘Kinetic experiments of gas generation for typical samples of marine gas precursors including low-maturity kerogen,residual kerogen and oil as well as dispersed liquid hydrocarbon(DLH)in source rocks were performed by closed system,and the evolution trends of molecular and isotopic compositions of natural gases from different precursors against the maturity(R0%)at laboratory conditions were analyzed.Several diagrams of gas origin were calibrated by using the experimental data.A diagram based on the ratio of normal and isomerous butane and pentane(i/nC4-i/nC5)was proposed and used to identify the origins of the typical marine natural gases in the Sichuan Basin and the Tarim Basin, China.And the maturities of natural gases were estimated by using the statistical relationships between the gaseous molecular carbon isotopic data and maturities(δ13C-R 0 %)with different origins.The results indicate that the molecular and isotopic compositions of simulated gases from different precursors are different from each other.For example,the dryness index of the oil-cracking gas is the lowest;the dryness indices of gases from DLH and kerogen in closed system are almost the same;and the dryness index of gases from residual kerogen is extremely high,indicating that the kerogen gases are very dry;the contents of non-hydrocarbon gases in kerogen-cracking gases are far higher than those in oil-cracking and DLH-cracking gases.The molecular carbon isotopes of oil-cracking gases are the lightest,those of kerogen in closed system and GLH-cracking gases are the second lightest,and those of cracking gases from residual kerogen are the heaviest.The calibration results indicate that the diagrams of ln(C1/C2)-ln(C2/C3)andδ13C2-δ13C3-ln(C2/C3)can discriminate primary and secondary cracking gases,but cannot be used to identify gas origin sources,while the diagram of i/nC4-i/nC5 can differentiate the gases from different precursors.The application results of these diagrams show that gas mixtures extensively exist in China,which involved the gases from multiple precursors and those from different maturity stages.For example,marine gases in the Sichuan Basin involve the mixture of oil-cracking gases and high-over-maturated kerogen gases,while those in the Tarim Basin involve not only the mixture of gases from multiple precursors,but also those from different maturity gases and post-reservoir alternations such as oxidized degradation and gas intrusion processes. | WANG YunPeng 1 ,ZHAO ChangYi 2 ,WANG ZhaoYun 2 ,WANG HongJun 2 ,TIAN Jin 1 ,ZOU YanRong 1 &LIU JinZhong1 1State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China 2Institute of Geology,Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China | 2008 | Science China Earth Sciences2008，51，S1： | 4 |
| 6 | Genetic analysis of fertility restoring genes for AL-type male sterility in wheat显示文摘In order to screen molecular markers linked to fertility restoring genes and further improve the breeding efficiency of restorer lines,in this study,wheat varieties 18A,18B and 99AR144-1 were used as experimental materials to establish F2 fertility-segregating population. Plant quantitative trait'major gene + polygene mixed model'separation analysis method and simple sequence repeat(SSR) molecular markers were adopted for genetic analysis of four generations,including the parents(P1 and P2),and hybrid(Fl and F2) populations. The results show that AL-type fertility restoring gene is controlled by two pairs of additive-dominant-epistatic genes and additive-dominant polygene;two primers linked to fertility restoring genes were selected by SSR molecular markers, including Xgwm95 on chromosome 2A and Barc61 on chromosome 1B,with the linkage distance of 15.0 cM and 18.0 cM,respectively. Based on verification,these two markers are reliable for distinguishing AL-type wheat sterile lines and restorer lines. | Liu Xiaofang Tian Xiaoming Nie Yingbin Mu Peiyuan Han Xinnian Sang Wei Cui Fengjuan Xu Hongjun Xiang Jishan | 2013 | Engineering Sciences2013，11，5： | 4 |
| 7 | Controlling Effects of Tight Reservoir Micropore Structures on Seepage Ability: A Case Study of the Upper Paleozoic of the Eastern Ordos Basin, China显示文摘In this study, the types of micropores in a reservoir are analyzed using casting thin section(CTS) observation and scanning electron microscopy(SEM) experiments. The high-pressure mercury injection(HPMI) and constant-rate mercury injection(CRMI) experiments are performed to study the micropore structure of the reservoir. Nuclear magnetic resonance(NMR), gas-water relative seepage, and gas-water two-phase displacement studies are performed to examine the seepage ability and parameters of the reservoir, and further analyses are done to confirm the controlling effects of reservoir micropore structures on seepage ability. The experimental results show that Benxi, Taiyuan, Shanxi, and Shihezi formations in the study area are typical ultra-low porosity and ultra-low permeability reservoirs. Owing to compaction and later diagenetic transformation, they contain few primary pores. Secondary pores are the main pore types of reservoirs in the study area. Six main types of secondary pores are: intergranular dissolved pores, intragranular dissolved pores, lithic dissolved pores, intercrystalline dissolved pores, micropores, and microfracture. The results show that reservoirs with small pore-throat radius, medium displacement pressure, and large differences in pore-throat structures are present in the study area. The four types of micropore structures observed are: lower displacement pressure and fine pores with medium-fine throats, low displacement pressure and fine micropores with fine throats, medium displacement pressure and micropores with micro-fine throats, and high displacement pressure and micropores with micro throats. The micropore structure is complex, and the reservoir seepage ability is poor in the study areas. The movable fluid saturation, range of the gas-water two-phase seepage zone, and displacement types are the three parameters that well represent the reservoir seepage ability. According to the characteristic parameters of microscopic pore structure and seepage characteristics, the reservoirs in the study area are classified into four types(Ⅰ–Ⅳ), and types Ⅰ, Ⅱ, and Ⅲ are the main types observed. From type Ⅰ to type Ⅳ, the displacement pressure increases, and the movable fluid saturation and gas-water two-phase seepage zone decrease, and the displacement type changes from the reticulation-uniform displacement to dendritic and snake like. | YANG Bo QU Hongjun PU Renhai TIAN Xiahe YANG Huan DONG Wenwu CHEN Yahui | 2020 | Acta Geologica Sinica(English Edition)2020，94，2： | 3 |
| 8 | Distribution and potential of global oil and gas resources显示文摘Using conventional and unconventional oil and gas resource evaluation methods with play as a unit, this study evaluates the oil and gas geology and resource potential of conventional oil and gas resources and seven types of unconventional resources in the global major oil and gas basins(excluding China). For the first time, resource evaluation data with independent intellectual property rights has been obtained. According to evaluation and calculation, the global recoverable conventional oil resources are 5 350.0×108 t, the recoverable condensate oil resources are 496.2×108 t, and the recoverable natural gas resources are 588.4×1012 m3. The remaining oil and gas 2 P recoverable reserves are 4 212.6×108 t, the reserve growth of oil and gas fields are 1 531.7×108 t. The undiscovered oil and gas recoverable resources are 3 065.5×108 t. The global unconventional oil recoverable resources are 4 209.4×108 t and the unconventional natural gas recoverable resources are 195.4×1012 m3. The evaluation results show that the global conventional and unconventional oil and gas resources are still abundant. | TONG Xiaoguang ZHANG Guangya WANG Zhaoming WEN Zhixin TIAN Zuoji WANG Hongjun MA Feng WU Yiping | 2018 | Petroleum Exploration and Development2018，45，4： | 2 |
| 9 | Optimized extreme learning machine for urban land cover classification using hyperspectral imagery显示文摘 | Hongjun SU Shufang TIAN Yue CAI Yehua SHENG Chen CHEN Maryam NAJAFIAN | 2017 | Frontiers of Structural and Civil Engineering2017，11，4： | 2 |
| 10 | CT radiomics can help screen the coronavirus disease2019(COVID-19): a preliminary study显示文摘The coronavirus disease 2019(COVID-19) is raging across the world.The radiomics,which explores huge amounts of features from medical image for disease diagnosis,may help the screen of the COVID-19.In this study,we aim to develop a radiomic signature to screen COVID-19 from CT images.We retrospectively collect 75 pneumonia patients from Beijing Youan Hospital,including 46 patients with COVID-19 and 29 other types of pneumonias.These patients are divided into training set(n = 50) and test set(n = 25) at random.We segment the lung lesions from the CT images,and extract 77 radiomic features from the lesions.Then unsupervised consensus clustering and multiple cross-validation are utilized to select the key features that are associated with the COVID-19.In the experiments,while twenty-three radiomic features are found to be highly associated with COVID-19,four key features are screened and used as the inputs of support vector machine to build the radiomic signature.We use area under the receiver operating characteristic curve(AUC) and calibration curve to assess the performance of our model.It yields AUCs of 0.862 and 0.826 in the training set and the test set respectively.We also perform the stratified analysis and find that its predictive ability is not affected by gender,age,chronic disease and degree of severity.In conclusion,we investigate the value of radiomics in screening COVID-19,and the experimental results suggest the radiomic signature could be a potential tool for diagnosis of COVID-19. | Mengjie FANG Bingxi HE Li LI Di DONG Xin YANG Cong LI Lingwei MENG Lianzhen ZHONG Hailin LI Hongjun LI Jie TIAN | 2020 | Science China(Information Sciences)2020，63，7： | 2 |
| 11 | Chan- nel estimation technology for MIMO-OFDM based on a- daptive step-size 显示文摘 | TIAN Wei ZHANG Yu WANG Hongjun | 2013 | Journal of Chongqing University of Posts and Telecommunications:Natural Science Edition2013，25，5： | 1 |
| 12 | Accelarated overrelaxation methods for rank deficient linear systems 显示文摘 | Tian Hongjun | 2003 | Appl Math Comput2003，140，： | 1 |
| 13 | Microbial residues as the nexus transforming inorganic carbon to organic carbon in coastal saline soils显示文摘Soil inorganic carbon(SIC),including mainly carbonate,is a key component of terrestrial soil C pool.Autotrophic microorganisms can assimilate carbonate as the main or unique C source,how microorganisms convert SIC to soil organic carbon(SOC)remains unclear.A systematic field survey(n=94)was performed to evaluate the shift in soil C components(i.e.,SIC,SOC,and microbial residues)along a natural salinity gradient(ranging from 0.5‰to 19‰),and further to explore how microbial necromass as an indicator converting SIC into SOC in the Yellow River delta.We observed that SIC levels linearly decreased with increasing salinity,ranging from~12 g kg^(-1)(salinity<6‰)to~10 g kg^(-1)(salinity>6‰).Additionally,the concentrations of SOC and microbial residues exponentially decreased from salinity<6‰ to salinity>6‰,with the decline of 39%and 70%,respectively.Microbial residues and SOC was tightly related to the variations in SIC.The structural equation model showed the causality on explanation of SOC variations with SIC through microbial residues,which can contribute 89% of the variance in SOC storage combined with SIC.Taken together,these two statistical analyses can support that microbial residues can serve as an indicator of SIC transition to SOC.This study highlights the regulation of microbial residues in SIC cycling,enhancing the role of SIC playing in C biogeochemical cycles and enriching organic C reservoirs in coastal saline soils. | Pengshuai Shao Tian Li Kaikai Dong Hongjun Yang Jingkuan Sun | 2022 | Soil Ecology Letters2022，4，4： | 1 |
| 14 | Geochemistry and Petrogenesis of Volcanic Rocks from the Continent-Ocean Transition Zone in Northern South China Sea and Their Tectonic Implications显示文摘Miocene–Pliocene(22–5 Myr) volcanism and associated seamounts are abundant in the continent-ocean transition(COT) zone in the margin of the north South China Sea(SCS). The petrogenesis of volcanic rocks from these seamounts and regional tectonic evolution of COT zone are poorly known. In this paper, we obtained whole-rock major and trace element compositions and Sr-Nd-Pb isotopic data for these volcanic rocks from the Puyuan and Beipo seamounts within COT zone, in northeastern SCS. Based on the geochemical analyses, the volcanic rocks are classified as alkaline ocean island basalts(OIB) and enriched mid-ocean ridge basalts(E-MORB). The OIBs from the Puyuan seamount are alkaline trachybasalts and tephrites that show enrichment of the light rare earth elements(LREE) relative to heavy rare earth elements(HREE) and more radiogenic Sr-Nd isotopic compositions, and have significant ‘Dupal isotopic anomaly'. In contrast, the E-MORBs from the Beipo seamount are tholeiitic basalts that have less enrichment in LREE and less radiogenic Sr-Nd isotopic compositions than the counterparts from the Puyuan seamount. Petrological and geochemical differences between the OIBs and MORBs from these two seamounts can be explained by different mantle sources and tectonic evolution stages of the COT zone. Syn-spreading OIB type basalts from the Puyuan seamount were derived from an isotopically ‘enriched', and garnet facies-dominated pyroxenitic mantle transferred by the Hainan mantle plume. In contrast, post-spreading E-MORB type basalts from the Beipo seamount are considered to be derived from the melting of isotopically ‘depleted' pyroxenite mantle triggered by lithosphere bending and subsequent post-rifting at the lower continental slope of the northern margin. | XU Yue YANG Yaoming YU Hongjun GAO Wei GAO Xiangxing LIU Baohua TIAN Xu YANG Jichao ZHANG Wenquan | 2020 | Journal of Ocean University of China2020，19，5： | 1 |
| 15 | An ngram-based approach for detecting approximately dupli cate database records显示文摘 | Zengping Tian Hongjun Lu Wenyun Ji | 2003 | International Journal on Dig ital Libraries2003，，2： | 1 |
| 16 | Lipolysis and lipid oxidation during processing of Chinese traditional smoke-cured bacon显示文摘 | HUANG Yechuan LI Hongjun HUANG Tian | 2014 | Food Chemistry2014，149，： | 1 |
| 17 | Lipolysis and lipid oxidation during processing of Chinese traditional smoke-cured bacon显示文摘 | HUANG Yechuan LI Hongjun HUANG Tian | 2014 | Food Chemistry2014，149，15： | 1 |
| 18 | T - tree or B-tree:MainMemory Database Index Structure Reviewed Austl' alasian DatabaseConrcrence 显示文摘 | Lu Hongjun + Yuet Yeung Ng + Tian Zengping | 2000 | 65 : 73-752000，65，： | 1 |
| 19 | Heteroscodestic Mixture Transition Distribution (HMTD) model显示文摘 | WANG HONGJUN TIAN ZHENG | 2008 | Journal of Applied Mathematics and Computing2008，28，12： | 1 |
| 20 | Synthesis of Monodisperse CoPt3 Nanocrystals and Their Catalytic Behavior for Growth of Boron Nanowires显示文摘Monodisperse CoPt3 nanocrystals (NC ) 被一个器官的 solvothermal 方法在 oleylamine 答案综合了。NC 在有好单个水晶结构的 10 nm 附近是有在 6.6 nm 和长度附近的一条直径的椭圆体的粒子。把 CoPt3 NC 用作催化剂,有从 30 ~ 50 nm 的直径的大区域的硼 nanowires 被化学蒸汽免职成功地作为先锋用 C/B/B2O3 混合物准备。结构的分析显示这些 nanowires 是与菱形的结构水晶的单身者。硼 nanowire 电影的地排放性质的测量证明硼 nanowires 有好地排放特征。 | Yuan Tian Chengmin Shen Chen Li Xuezhao Shi Yuan Huang Hongjun Gao | 2011 | Nano Research2011，4，8： | 0 |
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