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| 1 | Experimental study on hydration damage mechanism of shale from the Longmaxi Formation in southern Sichuan Basin, China显示文摘As a serious problem in drilling operation,wellbore instability restricts efficient development of shale gas.The interaction between the drilling fluid and shale with hydration swelling property would have impact on the generation and propagation mechanism of cracks in shale formation,leading to wellbore instability.In order to investigate the influence of the hydration swelling on the crack propagation,mineral components and physicochemical properties of shale from the Lower Silurian Longmaxi Formation(LF)were investigated by using the XRD analysis,cation exchange capabilities(CEC)analysis,and SEM observation,and we researched the hydration mechanism of LF shale.Results show that quartz and clay mineral are dominated in mineral composition,and illite content averaged 67%in clay mineral.Meanwhile,CEC of the LF shale are 94.4 mmol/kg.The process of water intruding inside shale along microcracks was able to be observed through high power microscope,meanwhile,the hydration swelling stress would concentrate at the crack tip.The microcracks would propagate,bifurcate and connect with each other,with increase of water immersing time,and it would ultimately develop into macro-fracture.Moreover,the macrocracks extend and coalesce along the bedding,resulting in the rock failure into blocks.Hydration swelling is one of the major causes that lead to wellbore instability of the LF shale,and therefore improving sealing capacity and inhibition of drilling fluid system is an effective measure to stabilize a borehole. | Xiangjun Liu Wei Zeng Lixi Liang Jian Xiong | 2016 | Petroleum2016，2，1： | 14 |
| 2 | A Novel Single Phase Grounding Fault Protection Scheme Without Threshold Setting for Neutral Ineffectively Earthed Power Systems显示文摘The setting values of thresholds for fault feature parameters are critical in all kinds of protection schemes.When the detected feature parameter value exceeds the setting value,the protection will trip.However,the setting value based conventional protection schemes sometimes cannot satisfy the protection requirements of neutral ineffectively earthed power systems(NIEPS)due to wide variations in operating conditions and the complexities of fault cases.In this paper,a novel single phase grounding fault protection scheme without threshold setting is proposed.The fault detection is achieved based on operating states rather than setting values.A fuzzy c-means algorithm is used to divide the operating state of the protected feeder into non-fault states and fault states.The cluster center of each state is then obtained by classifying the historical feature samples of the protected feeder extracted under various operating conditions into their corresponding states in a constructed multi-dimensional fault feature space.The distances between the detected feature samples and the cluster centers of the non-fault and the fault states are calculated.If the distance to the fault state is shorter than that to the non-fault state,a fault is detected.Otherwise,the feeder is considered normal.A PSCAD/EMTDC simulator is used to simulate a 35 kV NIEPS under various operating conditions,non-linear loads,and complex fault cases.Results show that the proposed single phase grounding fault protection scheme without threshold setting can protect the system correctly under all kinds of faults. | Xiangjun Zeng Kun Yu Yuanyuan Wang Yao Xu | 2016 | CSEE Journal of Power and Energy Systems2016，2，3： | 9 |
| 3 | Aquatic Species Dominate Organic Matter in Qinghai Lake during the Holocene:Evidence from Eolian Deposits around the Lake显示文摘Total organic carbon(TOC) in lake sediments and its stable carbon isotope(δ^(13)C_(org)) are widely applied to investigate paleoenvironmental changes even though their implications are complicated and multi-explanatory. Organic geochemistry studies of lake sediments from Qinghai Lake have been investigated, but some interpretations are controversial. In this study, TOC of one Holocene eolian section and δ^(13)C_(org) of three eolian sections were studied around Qinghai Lake. Results indicate that the TOC content in eolian deposits was low during the Early Holocene, and gradually increased to high values during the Middle and Late Holocene. The variation in TOC content of eolian deposits is different from that in the lacustrine sequence from Qinghai Lake during the Holocene. The δ^(13)C_(org) values in the eolian sections were relatively stable, with oscillation amplitudes of ~4‰(ranging from-25.8‰ to-22.1‰), in contrast to ~10‰ variation s in δ^(13)C_(org) values(varying from-30‰ to-20‰) in lacustrine sediments. Through comparison of TOC and δ^(13)C_(org) values between eolian deposits and lacustrine sediments, we can confirm indications that the organic matter in Qinghai Lake sediments during the Holocene was primarily a contribution of the aquatic species in the lake. This is significant for understanding the origin of organic matter in lake sediments on the northeastern Qinghai-Tibetan Plateau and for paleoenvironmental inferences using such proxies. | Fangming Zeng Xiangjun Liu Xiangzhong Li Chongyi E | 2017 | Journal of Earth Science2017，28，3： | 6 |
| 4 | The influence of water-based drilling fluid on mechanical property of shale and the wellbore stability显示文摘Because of high cost and pollution of oil-based drilling fluid,the water-based drilling fluid is increasingly used now.However,bedding planes and micro-cracks are rich in shale formation.When water-based drilling fluid contacts formation rock,it causes the propagation of crack and invasion of drilling fluid,which decrease shale strength and cause wellbore instability.In this paper,we analyzed influence of water-based drilling fluid on shale strength and failure mode by mechanics experiment.Based on those experimental results,considering the effect of bedding plane and drilling time,we established modeling of wellbore stability for shale formation.The result from this model indicates that in certain azimuth of horizontal well,collapsing pressure increases dramatically due to shale failure along with bedding plane.In drilling operation,those azimuths are supposed to be avoided.This model is applicable for predication of collapsing pressure in shale formation and offers reference for choosing suitable mud weight. | Shu He Lixi Liang Yinjin Zeng Yi Ding Yongxue Lin Xiangjun Liu | 2016 | Petroleum2016，2，1： | 6 |
| 5 | On-site safety evaluation for earth faults 显示文摘 | ZENG Xiangjun LI K K cHAN W L | 2003 | IEEE Trans on Industry Applications2003，39，15： | 1 |
| 6 | Some novel techniques for insulation parameters measurement and petersen-coil control in distribution systems显示文摘 | Zeng Xiangjun Xu Yao Wang Yuanyuan | 2010 | IEEE Tranactions on Industrial Electronics2010，57，4： | 1 |
| 7 | Some novel techniques for insulation parameters measurement and petersen-coil control in distribution systems显示文摘 | Zeng Xiangjun Xu Yao Wang Yuanyuan | 2010 | IEEE Tranactions on Industrial Electronics2010，57，4： | 1 |
| 8 | Ground-faultfeeder detection with fault-current and fault-resistance measurement in mine power systems显示文摘 | Zeng Xiangjun Li K K Cha W L | 2008 | IEEE Transactions on Industry Applications2008，44，2： | 1 |
| 9 | Influence of the Suspension Modes on Pollution Flashover Performance for ±800 kV Composite Insulators Under High Altitudes Condition显示文摘 | ZHANG Fuzeng SONG Lei LI Ruihai WANG Guoli ZENG Xiangjun LI Hao | 2012 | 高电压技术2012，38，12： | 1 |
| 10 | Apeli protects heart against ischemia/reperfusion injury in rat 显示文摘 | Zeng Xiangjun Zhang Like Wang Hongxia | 2009 | Peptides2009，30，6： | 1 |
| 11 | ATP - based automated fault simulation 显示文摘 | SU Sheng DUAN Xianzhong ZENG Xiangjun | 2008 | IEEE Traps on Power Delivery2008，23，3： | 1 |
| 12 | Novel methods for high impedance grond-fault protection in low-voltage supply systems显示文摘 | Li K K Chan W L Zeng Xiangjun | 2003 | The International Journal of Electric Power Components and Systems2003，31，12： | 1 |
| 13 | Novel methods for high impedance grond-fault protection in low-voltage supply systems显示文摘 | Li K K Chan W L ZENG Xiangjun | 2003 | The International Journal of Electric Power Components and Systems2003，31，12： | 1 |
| 14 | On-site safety evaluation for earth fault in mining power systems显示文摘 | Zeng Xiangjun Li K K Chan W L | 2003 | IEEE Transaction on Industry Applications2003，39，6： | 1 |
| 15 | On-site safety evaluation for earth fault in mining power systems显示文摘 | Zeng Xiangjun Li K K Chan W L | 2003 | IEEE Transactions on Industry Application2003，39，6： | 1 |
| 16 | Apelin protects heart against ischemia/reperfusion injury in rat 显示文摘 | Zeng Xiangjun Zhang Like Wang Hongxia | 2009 | Peptides2009，30，6： | 1 |
| 17 | A Design of the Temperature Test System Based on Grouping DS18B20显示文摘 | LI Ping ZHOU Yucai ZENG Xiangjun | 2007 | IEEE2007，10，2： | 1 |
| 18 | Signaling pathways in the regulation of cytokine release syndrome in human diseases and intervention therapy显示文摘Cytokine release syndrome(CRS)embodies a mixture of clinical manifestations,including elevated circulating cytokine levels,acute systemic inflammatory symptoms and secondary organ dysfunction,which was first described in the context of acute graft-versus-host disease after allogeneic hematopoietic stem-cell transplantation and was later observed in pandemics of influenza,SARS-CoV and COVID-19,immunotherapy of tumor,after chimeric antigen receptor T(CAR-T)therapy,and in monogenic disorders and autoimmune diseases.Particularly,severe CRS is a very significant and life-threatening complication,which is clinically characterized by persistent high fever,hyperinflammation,and severe organ dysfunction.However,CRS is a double-edged sword,which may be both helpful in controlling tumors/viruses/infections and harmful to the host.Although a high incidence and high levels of cytokines are features of CRS,the detailed kinetics and specific mechanisms of CRS in human diseases and intervention therapy remain unclear.In the present review,we have summarized the most recent advances related to the clinical features and management of CRS as well as cutting-edge technologies to elucidate the mechanisms of CRS.Considering that CRS is the major adverse event in human diseases and intervention therapy,our review delineates the characteristics,kinetics,signaling pathways,and potential mechanisms of CRS,which shows its clinical relevance for achieving both favorable efficacy and low toxicity. | Xia Li Mi Shao Xiangjun Zeng Pengxu Qian He Huang | 2021 | Signal Transduction and Targeted Therapy2021，6，11： | 1 |
| 19 | Power grid fault traveling wave network protection scheme 显示文摘 | Li Zewen Yao Jianggang Zeng Xiangjun Deng Feng | 2011 | Electrical Power and Energy Systems2011，33，： | 1 |
| 20 | On-site safety evaluation for earth fault in mining power systems显示文摘 | Zeng Xiangjun Li K K Chan W L | 2003 | IEEE Transaction on Industry Applications2003，39，6： | 1 |
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