|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effect and Prospect of Basic Geological Survey Based on Airborne Gravimetry in China显示文摘The airborne gravimetry was an important leap and innovation in the world's history of geophysical exploration.China's first test of the airborne gravity geological survey in the onshore-offshore transitional area of the western and southern part of the Bohai Sea was successful and effective in geology.Based on the airborne gravity data,and combining previous ground gravity,seismic and drilling data etc.,we carried out the geological interpretation by forward and inverse methods.The result shows that the airborne Bouguer gravity anomaly was clear,the fracture interpretation was reliable,and the inversion depth of the main geological interfaces was relatively accurate.This airborne gravity geological survey not only filled the exploring gaps in the onshore-offshore transitional area,and realized the geological and tectonic junction between the sea and the land,but also discovered four local gravity anomalies,11 fractures and three sags or subsags,and so on.The good geological effect of airborne gravimetry not restricted by terrain condition shows that it can be served as a new geophysical method in the exploration of complex terrain physiognomy area such as mountain,jungle,desert,marsh,onshore-offshore transitional area and so on,and has an extensive application prospect in China in the future. | LI Wenyong ZHOU Jianxin XIONG Shengqing GUO Zhihong LU Wenfen XU Jianchun LIU Yanxu | 2012 | Acta Geologica Sinica(English Edition)2012，86，1： | 11 |
| 2 | Allele-defined genome reveals biallelic differentiation during cassava evolution显示文摘Dear Editor,Generation of heterozygous genomes by hybridization between or within species can help maintain plant diversity and serve as a potential source of new species(Baek et al.,2018).Moreover,genomic heterozygosity is associated with genomic coadaptation,developmental stability,and heterosis.Accurate definition of alleles in haplotypes is necessary to precisely characterize allelic variation controlling agriculturally important traits(Shi et al.,2019).Currently,most released genomes have mosaic assembly of haplotypes due to random selection or collapse of alleles during genome assembly(Shi et al.,2019),which masked allelic variation and functional differentiation of divergent alleles in heterozygous species. | Wei Hu Changmian Ji Haitao shi Zhe Liang Zehong Ding Jianqiu Ye Wenjun Ou Gang Zhou Weiwei Tie Yan Yan Jinghao Yang Xiaoying Yang Yunxie Wei Zhiqiang Jin Jianghui Xie Ming Peng Wenquan Wang Anping Guo Biyu Xu Jianchun Guo Songbi Chen Liming Ma Mingcheng Wang Yang Zhou Xiaolong Li Ruoxi Li Siyi Guo Xinhui Xiao Zhongqing Wan Feifei An Jie Zhang Qingyun Leng Yin Li Ray Ming Kaimian Li | 2021 | Molecular Plant2021，14，6： | 8 |
| 3 | Epidemiological Characteristics of Human Anthrax-China,2018-2021显示文摘Introduction:The epidemic of human anthrax is at a low level in China in recent years,but the reported incidence increased in 2021.In order to understand the current landscape of research and knowledge about anthrax in China,the epidemiological characteristics of anthrax in humans from 2018 to 2021 were analyzed and the prevention and control suggestions were proposed.Methods:Surveillance data of anthrax in humans and livestock,together with human outbreaks data during 2018-2021,were collected and analyzed by descriptive statistics methods.The number and proportion of outbreaks,cases and deaths by provincial-level administrative divisions(PLADs),clinical types,and contributing factors were calculated.Results:A total of 1,244 cases of human anthrax and 53 outbreaks were reported from 2018 to 2021 in China.While the incidence of anthrax declined from 2018 to 2020,it increased in 2021.The regions of anthrax were mainly located in the west and the northeast PLADs of China,though cases were reported in some central and eastern PLADs in 2021.Young and middle-aged men involved in animal husbandry were found to be at a higher risk of anthrax.All the reported outbreaks were associated with the exposure of infected livestock.A total of 296 livestock anthrax cases were reported.Conclusions:The increased incidence and wider geographical distribution of human anthrax in 2021 were found to be the result of inadequate supervision of diseased animals as well as updated diagnostic criteria.As such,the monitoring of risk factors and emergency preparation procedures should be strengthened at the national level.In addition,it is also critical to strengthen health education for high-risk occupational groups and strengthen professional training for local clinicians.Finally,more measures should be carried out to strengthen anthrax surveillance in livestock husbandry. | Huijuan Zhang Enmin Zhang Mu Guo Jinrong He Wei Li Jianchun Wei | 2022 | China CDC weekly2022，4，35： | 4 |
| 4 | An optimal fracture geometry design method of fractured horizontal wells in heterogeneous tight gas reservoirs显示文摘In this work, the unified fracture design(UFD) is extended for the first time to the fractured horizontal wells in heterogeneous closed box-shaped tight gas reservoirs. Utilizing the direct boundary element method and influence function, the dimensionless fracture productivity index is obtained and expressed in the function of proppant volume and fracture geometry at the pseudo-steady state. With the iterative method, the effectively propped permeability, kfe, is corrected using the in-situ Reynolds number, N_(Re). The goal of this paper is to present a new UFD extension to design the proppant volume and the optimal fracture geometry. The results show that there exists an optimal proppant volume for a certain reservoir. The small aspect ratio(y_e/x_e) and high permeability reservoirs need short and wide fractures to diminish the non-Darcy effect. On the contrary, long and narrow fractures are required for the large aspect ratio and low permeability reservoirs. A small proppant volume is prone to creating long fractures, while a relatively large proppant volume creates wide fractures. The new extension can be used to evaluate the previous fracture parameters and design the following fracture parameters of the fractured horizontal well in heterogeneous tight gas reservoirs, with the non-Darcy effect taken into account. | ZENG FanHui KE YuBiao GUO JianChun | 2016 | Science China(Technological Sciences)2016，59，2： | 3 |
| 5 | Effect of Ga addition on the magnetic properties and microstructure of nanocrystalline Nd_(12.3)Fe_(81.7)B_(6.0) ribbons显示文摘Nd 12.3 Fe 81.7 x Ga x B 6.0 (x = 0-1.8) ribbons were prepared by melt spinning at 22 m/s and subsequent annealing treatment. The influences of Ga addition and annealing conditions on the magnetic properties and microstructure of the nanocrystalline alloys were systematically investigated. After being annealed at 620℃ for 20 min, the J r and H ci increased from 0.85 T and 582.6 kA/m for Ga-free sample to 0.97 T and 734.6 kA/m for the x = 0.9 sample, respectively. The (BH) max for the x = 0.9 sample increased by about 40% from 96.3 to 135.5 kJ/m 3 compared with that of the Ga-free one. The significant improvement of magnetic properties originated from the refinement of grains in the samples by introducing Ga, which led to a stronger exchange coupling between the neighboring grains in comparison with that in Ga-free samples. The microstructure and magnetic properties of the samples depended strongly on annealing parameters, while the sensitivity of micro-structure to annealing conditions could be significantly suppressed by the addition of Ga element. | BAO Xiaoqian GUO Xiaoyan GUO Jianchun GAO Xuexu | 2011 | Rare Metals2011，30，5： | 3 |
| 6 | Changes in Total Factor Productivity,Technological Progress and Efficiency of Banana Industry in China显示文摘Based on the DEA-based Malmquist index method,the total factor productivity was calculated for 5 major banana production areas in 2003-2004,and it was further divided into technological progress and technical efficiency.The results show that the total factor productivity of banana industry in China was 1.3% in the sample period,mainly due to technological progress,the average growth rate was 2.6%,while the pure technical efficiency and scale efficiency was -0.1% and -1.2% respectively.The improvement of total factor productivity in banana industry in China relied mainly on technological progress,cultivation of new banana varieties,management of high quality cultivation,popularization and application of water conservation and fertilizer saving technology,and injury-free picking technologies.The pure technical efficiency and scale efficiency of banana production were negative,indicating that the management level of banana was not high.The effect of scale economy of this industry through agglomeration and consolidation is still to be practiced.Banana growers should promote the improvement of large scale and management level of the banana industry at the same time of promoting the technological progress. | Fang WANG Qinghe HUAN Youpeng KE Jianchun GUO Qiudong LIU | 2017 | Asian Agricultural Research2017，9，8： | 2 |
| 7 | Mechanisms of shale hydration and water block removal显示文摘Shale samples of Silurian Longmaxi Formation in the Changning area of the Sichuan Basin, SW China, were selected to carry out scanning electron microscopy, CT imaging, high-pressure mercury injection, low-temperature nitrogen adsorption and imbibition experiments to compare the hydration characteristics of montmorillonite and illite, analyze the main factors affecting the water block removal of shale, and reveal the mechanisms of pore structure evolution during shale hydration. The hydration characteristics of shale are closely related to the composition of clay minerals, the shale with high illite content is not susceptible to hydration and thus has limited room for pore structure improvement;the shale with high montmorillonite is susceptible to hydration expansion and thus has higher potential of pore structure improvement by stimulation;the shale with high illite content has stronger imbibition in the initial stage, but insufficient diffusion ability, and thus is likely to have water block;the shale with high montmorillonite content has weaker imbibition in the initial stage but better water diffusion, so water blocking in this kind of shale can be removed to some degree;the shale reservoir has an optimal hydration time, when it is best in physical properties, but hydration time too long would cause damage to the reservoir, and the shale with high illite content has a shorter optimal hydration time;inorganic cations can inhibit the hydration of clay minerals and have stronger inhibition to illite expansion, especially K^(+);for the reservoir with high content of montmorillonite, the cation content of fracturing fluid can be lowered to promote the shale hydration;fracturing fluid with high K^(+) content can be injected into reservoirs with high illite content to suppress hydration. | ZENG Fanhui ZHANG Qiang GUO Jianchun ZENG Bo ZHANG Yu HE Songgen | 2021 | Petroleum Exploration and Development2021，48，3： | 2 |
| 8 | The mechanism of high-pressure high-temperature and low permeability acid pretreatment to reduce fracturing pressure显示文摘 | DENG Yan XUE Renjiang GUO Jianchun | 2011 | Journal of Southwest Petroleum University(Science&Technology Edition)2011，33，3： | 1 |
| 9 | Comparison of the clinical features and therapeutics of COVID-19 in cardio-cerebrovascular disease(CCVD)and non-CCVD patients显示文摘Cardio-cerebrovascular disease(CCVD)is a major comorbidity of coronavirus disease 2019(COVID-19).However,the clinical characteristics and outcomes remain unclear.In this study,102 cases of COVID-19 from January 22,2020 to March 26,2020 in Xixi Hospital of Hangzhou were included.Twenty cases had pre-existing CCVD.Results showed that compared with non-CCVD patients,those with CCVD are more likely to develop severe disease(15%versus 1%),and the proportion of pneumonia severity index grade IV was significantly higher(25%versus 3.6%).Computed tomography images demonstrated that the proportion of multiple lobe lesion involvement was significantly higher in the CCVD group than in the non-CCVD group(90%versus 63.4%).Compared with non-CCVD group,the levels of C-reactive protein,fibrinogen,D-dimer,and serum amyloid-A were higher,whereas the total protein and arterial partial Pa02 were lower in the CCVD group.Although no statistical difference was observed in the outcomes between groups,CCVD patients received more intensive comprehensive treatment to improve COVID-19 symptoms compared with non-CCVD patients.Integrated Chinese and Western medicine treatments have certain advantages in controlling the severe conversion rate and mortality of COVID-19.In addition,given that COVID-19 patients are usually related to coagulation disorders and thrombosis risk,the application of Chinese medicine in promoting blood circulation and removing stasis should be strengthened. | Yu Wang Lan Li Yuanjiang Pan Yu He Zuhua Chen Yunhao Xun Yuhan Xu Yilei Guo Jiehong Yang Jianchun Guo Haitong Wan | 2021 | Frontiers of Medicine2021，15，4： | 1 |
| 10 | A novel process for preparing expanded Polytetrafluoroethylene(ePTFE) micro-porous membrane through ePTFE/ePTFE co-stretching technique显示文摘 | Yuhai Guo Jianyong Chen Xinmin Hao Jianchun Zhang Xinxing Feng Huapeng Zhang | 2007 | Journal of Materials Science2007，，6： | 1 |
| 11 | China vigorously promoting shale gas exploration,dcvelopment显示文摘 | Guo Jianchun Zhao Zhihong | | 0，，： | 1 |
| 12 | The rice ERF transcription factor OsERF922 negatively regulates resistance to Magnaporthe oryzae and salt tolerance显示文摘 | Dongfeng Liu Xujun Chen Jiqin Liu Jianchun Ye Zejian Guo | 2012 | Journal of Experimental Botany2012，，10： | 1 |
| 13 | A new forecasting model of fuzzy time series显示文摘 | Wang Hongxu Guo Jianchun Feng Hao Jin Hailong | 2014 | Applied Mechanics and Ma- terials2014，，： | 1 |
| 14 | Production performance analysis for composite shale gas reservoir considering multiple transport mechanisms显示文摘 | Xu Jianchun Guo Chaohua Wei Mingzhen Jiang Ruizhong | 2015 | Journal of Natural Gas Science and Engineering2015，26，： | 1 |
| 15 | Study on gas flow through nano pores of shale gas reservoirs显示文摘 | GUO Chaohua XU Jianchun WU Keliu | 2015 | Fuel2015，143，： | 1 |
| 16 | Modern biotenology revolution andbanana production development in China显示文摘 | XIA Yongkai GUO Jianchun | 2009 | Guangdong Agricul-ture Science2009，，5： | 1 |
| 17 | hale gas reservoir modeling and production evaluation considering complex gas transport mechanisms and dispersed distribution of kerogen显示文摘Stimulated shale reservoirs consist of kerogen,inorganic matter,secondary and hydraulic fractures.The dispersed distribution of kerogen within matrices and complex gas flow mechanisms make production evaluation challenging.Here we establish an analytical method that addresses kerogen-inorganic matter gas transfer,dispersed kerogen distribution,and complex gas flow mechanisms to facilitate evaluating gas production.The matrix element is defined as a kerogen core with an exterior inorganic sphere.Unlike most previous models,we merely use boundary conditions to describe kerogen-inorganic matter gas transfer without the instantaneous kerogen gas source term.It is closer to real inter-porosity flow conditions between kerogen and inorganic matter.Knudsen diffusion,surface diffusion,adsorption/desorption,and slip corrected flow are involved in matrix gas flow.Matrix-fracture coupling is realized by using a seven-region linear flow model.The model is verified against a published model and field data.Results reveal that inorganic matrices serve as a major gas source especially at early times.Kerogen provides limited contributions to production even under a pseudo-steady state.Kerogen properties’influence starts from the late matrix-fracture inter-porosity flow regime,while inorganic matter properties control almost all flow regimes except the early-mid time fracture linear flow regime.The contribution of different linear flow regions is also documented. | Jie Zeng Jishan Liu Wai Li Yee-Kwong Leong Derek Elsworth Jianchun Guo | 2021 | Petroleum Science2021，18，1： | 1 |
| 18 | Preparation and magnetic properties of anisotropic Nd2Fe14B/Sm2Co17 hybrid-bonded magnets显示文摘In the present work, anisotropic Nd2 Fe14 B/Sm2 Co17 hybrid-bonded magnets were prepared with different Nd-Fe-B contents. It is found that the particle distributions and ratios between the two magnetic phases have important roles in the magnetic properties, microstructures and thermal stability of the magnets. With increase of Nd-Fe-B content, the saturation magnetization of the anisotropic hybrid magnet increases significantly, however, coercivity decreases, and the demagnetization curves show magnetically single-phase behavior. The anisotropic Nd2 Fe14 B/Sm2 Co17 hybrid-bonded magnets exhibit a maximum energy product and remanence of 14.15 MGOe and 99.53 A·m2/kg, respectively, when the NdFe-B content is 70 wt% at room temperature. Furthermore, the hybrid magnets also have better thermal stability at elevated temperatures due to the interaction between the two magnetic particles. | Xueguo Yin Yue Sui Qiqi Yang Qian Shen Yilong Ma Bin Shao Jianchun Sun Donglin Guo | 2019 | Journal of Rare Earths2019，37，10： | 1 |
| 19 | Production Performance Analysis for Composite ShaleGas Reservoir Considering Multiple Transport Mechanisms显示文摘 | XU JIANCHUN’GUO CHAOHUA WEI MINGZHEN etal | 2015 | Journal of Natural Gas Science and Engineering2015，26，： | 1 |
| 20 | Hydraulic fracturing induced casing shear deformation and a prediction model of casing deformation显示文摘To study the casing deformation(CD)in shale gas well fracturing caused by natural fracture slip,a fracture face stress model is built based on stress analysis,and a CD prediction model is established based on complex function to analyze factors affecting wellbore shear stress and CD.(1)The fracture and wellbore approach angles have significant impacts on the wellbore shear stress.In Weiyuan shale gas field,Sichuan Basin,under the common wellbore approach angle of nearly 90°,the wellbore is subjected to large shear stress and high risk of CD at the fracture approach angle range of 20° to 55° or its supplementary angle range.(2)When the fracture is partially opened,the wellbore shear stress is positively correlated with the fluid pressure,and negatively correlated with the fracture friction coefficient;when the fracture is fully opened,the wellbore shear stress is positively correlated with the natural fracture area.(3)The lower the elastic modulus and the longer the fracture length,the more serious the CD will be,and the Poisson’s ratio has a weak influence on the CD.The deformation first increases and then decreases with the increase of fracture approach angle,and reaches the maximum when the fracture approach angle is 45°.(4)At a given fracture approach angle,appropriately adjusting the wellbore approach angle can avoid high shear stress acting on wellbore,and reasonable control of the fluid pressure in the fracture can reduce the CD risk.The shear stress acting on casing is usually much greater than the shear strength of casing,so increasing casing strength or cementing quality have limited effect on reducing the risk of CD.Caliper logging data has verified that the CD prediction model is reliable,so the model can be used to establish risk analysis chart and calculate deformation value,to provide a reference for quick CD risk prediction in fracturing design. | LU Qjanli LIU Zhuang GUO Jianchun HE Le LI Yanchao ZENG Ji REN Shan | 2021 | Petroleum Exploration and Development2021，48，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员