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| 1 | Structure and coalbed methane occurrence in tectonically deformed coals显示文摘Research on structure of tectonically deformed coals(TDC) is a key issue in coal and gas outburst prevention and coalbed methane(CBM) exploitation.This paper presents a summary on the research progress in TDC's structural-genetic classification,tectonic strain influence on coal microstructure,coal porosity system,coal chemical structure and constituents,and their relationship with the excess coalbed methane.Previous studies suggested that tectonic deformation had significant influence on coal microstructure,coal super microstructure,and even chemical macromolecular structure.The main mechanisms of coal deformation are the tectonic stress degradation and polycondensation metamorphism(dynamical metamorphism).Besides,under different deformation mechanisms,the ultra-and micro-structure and chemical constituents of TDC presented distinct characteristics.Based on these achievements,we propose one possible evolutionary trend of TDC with different deformation mechanisms,and suggest that the coal and gas outburst in the TDC,especially in the mylonitic coals,may be not only controlled by geological structure,but also influenced by the tectonic stress degradation of ductile deformation.Therefore,further study on TDC should be focused on the controlling mechanism of deformation on structure and composition of coal,generation conditions and occurrence state of excess coalbed methane from deformation mechanism of coal. | HOU QuanLin LI HuiJun FAN JunJia JU YiWen WANG TianKai LI XiaoShi WU YuDong | 2012 | Science China Earth Sciences2012，55，11： | 49 |
| 2 | Comparison of coalbed gas generation between Huaibei-Huainan coalfields and Qinshui coal basin based on the tectono-thermal modeling显示文摘The geothermal history and the tectonic subsidence history of the Huaibei-Huainan coalfields were reconstructed by using the vitrinite reflectance data, and their correlative restriction on coalbed gas generation of Huaibei-Huainan coalfields and Qinshui coal basin was discussed. The burial, thermal, and maturity histories of are similar between Huaibei coalfield and Huainan coalfield, obviously different from those of Qinshui coal basin. Based on the tectono-thermal evolution characters of Huaibei-Huainan coalfields and Qinshui basin, the process of coalbed gas generation can be divided into three stages: (1) During Early Mesozoic, both in Huaibei-Huainan and Qinshui, the buried depth of Permian coal seams increased rapidly, which resulted in strong metamorphism and high burial temperature of coal seams. At this stage, the coal rank was mainly fat coal, and locally reached coking coal. These created an environment favoring the generation of thermogenic gas. (2) From Late Jurassic to Cretaceous, in the areas of Huaibei-Huainan, the strata suffered from erosion and the crust became thinning, and the Permian coal-bearing strata were uplifted to surface. At this stage, the thermogenic gas mostly escaped. Conversely, in Qinshui basin, the cover strata of coal seams kept intact during this stage, and the thermogenic gas were mostly preserved. Furthermore, with the interaction of magmatism, the burial temperature of coal seams reached higher peak value, and it was suitable for the secondary generation of thermogenic gas. (3) From Paleogene onward, in area of Huainan-Huaibei, the maturity of coal and burial temperature were propitious to the generation of secondary biogenic gases. However, in Qinshui basin, the maturity of coal went against genesis of second biogenic gas or thermogenic gas. By comparison, Huaibei-Huainan coalfields are dominated by thermogenic gas with a significant biogenic gas and hydrodynamic overprint, whereas Qinshui basin is dominated mainly by thermogenic gas. | WU YuDong JU YiWen HOU QuanLin HU ShengBiao PAN JieNan FAN JunJia | 2011 | Science China Earth Sciences2011，54，7： | 13 |
| 3 | Characteristics of Long Air Gap Discharge Current Subjected to Switching Impulse显示文摘Measuring the pre-breakdown current of long sparks in air is important for investigating the discharge mechanism.Since the breakdown of long air gaps is conducted by a series of streamer-leader processes,the corresponding current signals cover a bandwidth of 0 to more than 20 MHz.Measurement accuracy of the current from the high voltage side is affected by the displacement current and impulse electromagnetic interference.In this paper,a coaxial current sensor with a DC bandwidth of 74.45 MHz is developed.A displacement current-restrained electrode structure is proposed to reduce the equivalent capacitance between the current sensor and the ground over 30 times.Combined with the digital optical fiber synchronous acquisition unit,a current measurement system for long air gap discharge is established.For the purpose of the UHV system’s external insulation optimization design,the discharge current waveform of a 6 m rod-plane air gap under positive switching impulse voltage with 250µs and 1000µs time to crest is obtained.Discharge images and stressed voltage are combined to analyze the continuous feature of a current waveform under critical time to crest impulse and discontinuous feature under long front duration impulse.For the purposes of a lightning protection study,the current waveform of a 10 m rod-plane air gap is subjected to negative switching impulse.Finally,the pulse characteristics of the current corresponding to the single channel and branching stepped negative leader are discussed. | Yishi Yue Hengxin He Weijiang Chen Junjia He Chuanqi Wu Xiangen Zhao Feng Huo | 2015 | CSEE Journal of Power and Energy Systems2015，1，3： | 13 |
| 4 | Mushroom Poisoning Outbreaks-China,2020显示文摘What is already known about this topic?Acute liver failure,rhabdomyolysis,acute renal failure,and hemolysis caused by poisonous mushrooms are the most important mushroom poisoning threats to the Chinese population.The most notorious lethal mushrooms are the species from genera Amanita,Lepiota,and Galerina that cause acute liver failure,and Russula subnigricans that leads to rhabdomyolysis.What is added by this report?In 2020,the total number of investigations reached 676,involving an estimated 102 species of poisonous mushrooms,24 of which were newly recorded in China.Gyromitra venenata was newly discovered in incidents in Yunnan and Guizhou provinces and were the first reported poisonings due to gyromitrins in China since 2000.The rare poisoning Shiitake mushroom dermatitis was recorded in China.Hemolysis poisoning caused by Paxillus involutus was recorded for the second time since the beginning of the new century,resulting in one death in Inner Mongolia Autonomous Region.What are the implications for public health practice?Promoting knowledge about safe consumption of mushrooms is essential to reduce mushroom poisonings.It is not wise to collect and eat wild mushrooms.For southwestern provinces such as Yunnan,especially,caution must be exercised with unfamiliar mushroom species. | Haijiao Li Hongshun Zhang Yizhe Zhang Jing Zhou Yu Yin Qian He Shaofeng Jiang Peibin Ma Yutao Zhang Ke Wen Yuan Yuan Nan Lang Bowen Cheng Junjia Lu Chengye Sun | 2021 | China CDC weekly2021，3，3： | 13 |
| 5 | Mushroom Poisoning Outbreaks--China,2019显示文摘What is already known about this topic?Mushroom poisoning is becoming one of the most serious food safety issues in China,which is responsible for nearly a half of all oral poisoning deaths.What is added by this report?In China,many mushrooms were previously“recorded”as poisonous.In this study,about 70 species obtained from mushroom poisoning incidents including several new records were confirmed accurately by morphological and molecular evidence in 2019,and spatial and temporal distribution characters of 13 lethal mushrooms were summarized systematically.What are the implications for public health practice?Precise and timely species identification is of pivotal importance in mushroom incidents.More efforts and cooperation are continued to be needed urgently for the governments,CDC staff,doctors and mycologists in future. | Haijiao Li Hongshun Zhang Yizhe Zhang Kaiping Zhang Jing Zhou Yu Yin Shaofeng Jiang Peibin Ma Qian He Yutao Zhang Ke Wen Yuan Yuan Nan Lang Junjia Lu Chengye Sun | 2020 | China CDC weekly2020，2，2： | 11 |
| 6 | Response of Macromolecular Structure to Deformation in Tectonically Deformed Coal显示文摘有不同 deformational 机制和不同 deformational 紧张的构造地使变形的煤(TDC ) 的结构的进化通过 31 上的分析不同变形等级取样的 X 光检查衍射(XRD ) 深入地被调查(Ro,最大:0.7%3.1%) 从 Huaibei 煤田镇定。结果显示在有变态和变丑增加的可锻、易碎的 deformational 煤之间有不同进化特征。随变态的增加,在一方面,原子飞机间距( d002 )在步速度正在减少,叠 BSU 层( Lc )起初正在增加然后减少,但是 BSU 层( La )和 La/Lc 的比率的延期开始正在减少然后增加。为易碎的 deformational 煤,当 deformational 紧张正在增加时,在另一方面, d002 开始正在增加然后减少,它在降低中间或高中间的变态等级下面引起 Lc 和 La 的变化的倒置。在可锻的 deformational 煤,相反, d002 开始减少了然后增加,并且 Lc 的价值随 deformational 的增加减少了紧张。但是 La 的价值在降低中间的变态等级下面增加了并且起初增加了然后在高中间的变态等级下面减少了。我们断定 TDC macromolecular 结构的降级和 polycondensation 能显然在可锻的 deformational 过程期间被影响,因为统一脱臼的增加和累积也许把压力转变成紧张精力。同时,易碎的变丑能把压力转变成部分热能,并且也支持变态和降级。变丑比对可锻、易碎的 deformational 煤的微分进化的变态更重要,这能被结束。 | LI Xiaoshi JU Yiwen HOU Quanlin FAN Junjia | 2013 | Acta Geologica Sinica(English Edition)2013，87，1： | 8 |
| 7 | Development and prospect of direct‐current circuit breaker in China显示文摘The direct‐current circuit breaker(DCCB)is the most ideal choice for DC fault isolation in DC grids.Despite a late start,China's research and development on the DCCB have made outstanding achievements.This article provides a brief glance of current China's DCCB development status.It begins by sorting out the technical route according to the topology of DCCB.Then it systematically summarises both mechanical and hybrid DCCBs with focussing on the aspects of topology structure and principle,key technology and characteristics,prototype development and application.It is apparent that Chinese scientists and engineers confronted the worldwide problem of large capacity DC breaking,and put forward a comprehensive solution which consists of an innovative topology structure based on coupled negative voltage circuit,breaking throughs on the key technologies such as highly controllable and reliable fault current commutation,millisecond‐level ultra‐fast and efficient electromagnetic repulsion mechanism,high tolerance and high stability power electronic switch,low residual voltage and fast response energy consumption device,etc.The article states that the world's first set of hybrid high‐voltage(HV)DCCB,and the first set of mechanical HV DCCB have been developed.These DCCBs will soon be deployed to the DC grids which have the highest voltage levels therefore require the strongest breaking capacity.These achievements are leading the world in the development and application of DCCB.The article also discusses the overall development trends of DCCB in the areas of new topologies,key techno-logical breakthroughs and application scenarios,etc.These discussions serve as references for DCCB's future technological advancement and its ever‐expanding applications. | Weijiang Chen Rong Zeng Junjia He Yi Wu Xiaoguang Wei Taixun Fang Zhanqing Yu Zhao Yuan Yifei Wu Wandi Zhou Bing Yang Lu Qu | 2021 | High Voltage2021，6，1： | 6 |
| 8 | Physical Simulation of Mold-Filling Processing of Thin-Walled Castings under Traveling Magnetic Field显示文摘Mold-filling process of thin-walled castings under the condition of traveling magnetic field has been studied by physical simulation method using gallium melt and fast speed photography. Flow morphology and its formation mechanism were obtained and discussed for thin-walled casting. The influences of magnetic field density on the filling ability,filling velocity and mold filling time have been studied. The differences in filling capability between gravity casting and casting under the traveling magnetic field have been compared. The results indicate that the mold filling ability of the gallium melt increases greatly under the condition of traveling magnetic field; the filling time is shortened from 18 s under gravity field to 3 s under the traveling magnetic field and average flow rate of the melt increases from 1.6to 8.68 cm3/s; the change law of the cross-section morphology of the gallium melt during the mold filling is that at first, the cross-section area does not change, then it decreases gradually. When the front of the melt reaches the end of the mold cavity, the front melt will backfill the mold; the wider the width of mold cavity, the better the mold filling ability. The mold filling ability of gallium melt in mold with upper magnetic conductor is better than that without upper magnetic conductor. | YanqingSU TiejunZHANG JingjieGUO HongshengDING WeishengBI JunJIA HengzhiFU | 2004 | Journal of Materials Science & Technology2004，20，1： | 6 |
| 9 | Subwavelength grating devices in silicon photonics显示文摘Subwavelength grating(SWG) waveguides in silicon-on-insulator are emerging as an enabling technology for implementing compact, high-performance photonic integrated devices and circuits for signal processing and sensing applications. We provide an overview of our recent work on developing wavelength selective SWG waveguide filters based on Bragg gratings and ring resonators, as well as optical delay lines. These components increase the SWG waveguide component toolbox and can be used to realize more complex photonic integrated circuits with enhanced or new functionality. | Junjia Wang Ivan Glesk Lawrence R.Chen | 2016 | Science Bulletin2016，61，11： | 5 |
| 10 | Formation condition of deep gas reservoirs in tight sandstones in Kuqa Foreland Basin显示文摘Due to the high expense of deep oil and gas exploration,prediction of gas-bearing properties before drilling is crucial for deep gas reservoir of tight sandstone.Deep tight sandstone gas fields in Kuqa Foreland Basin are characterized by high abundance,high gas saturation,high pressure,high and stable yield,which belong to high-efficiency tight gas reservoir.Based on theoretical analysis of controlling factors and mechanisms of gas-bearing properties for tight sandstone gas reservoir,and taking tight sandstone gas fields with high effectiveness such as Dibei,Keshen and Dibei gas fields in Kuqa Foreland Basin as examples,formation condition and mechanism of high-efficiency tight sandstone gas reservoir in Kuqa area are studied through a comparative analysis of typical tight sandstone gas reservoir in Sichuan Basin and Ordos Basin.The results show that the formation condition of deep gas reservoir of tight sandstone in Kuqa foreland basin includes four factors:i.e.,overpressure gas charging,fracture development,“early-oil and late-gas”accumulation process and favorable preservation condition.The overpressure gas charging and fracture development are the most important factors for formation of high-efficiency tight gas reservoirs in Kuqa Foreland Basin.High-quality source rocks,high sourcereservoir pressure difference,and overpressure filling induced thereby are preconditions for formation of tight sandstone with high gas saturation.The fracture development controls gas migration,accumulation,and high yield of tight sandstone gas reservoir.The reservoir wettability changed by the early oil charging is beneficial to late natural gas charging,and the preservation condition of high-quality gypsum cap rocks is the key factor for gas reservoirs to maintain overpressure and high gas saturation.Matching of above four favorable factors leads to the tight sandstone gas reservoir with high abundance,high gas saturation and high gas production in Kuqa Foreland Basin,which is very different from other basins.Under the condition of little difference in physical property of tight sandstone reservoir,excessive source-reservoir pressure difference,facture development,preservation condition and current formation overpressure are the most significant factors to be considered in exploration and evaluation of deep tight sandstone gas. | Xuesong Lu Mengjun Zhao Keyu Liu Qingong Zhuo Junjia Fan Zhichao Yu Yanjie Gong | 2018 | Petroleum Research2018，3，4： | 4 |
| 11 | Semisolid-rolling and annealing process of woven carbon fibers reinforced Al-matrix composites显示文摘Semisolid-rolling method was successfully developed to prepare the Ni-coated woven carbon fibers reinforced Al-matrix composite. Due to the appropriate matrix flowability and rolling pressure, the Al-matrix could infiltrate into the woven fibers sufficiently and attach to the reinforcements closely forming a smooth interface. The rolling speed of 4 rad/min offered a subtle equilibrium between the heat transfer and the material deformation. The covering matrix should be controlled at semisolid state to provide a better infiltration behavior and a protective effect on the carbon fibers. With the addition of fibers, an improvement for more than 25% was obtained in the bending strength of the materials. Furthermore, the woven carbon fibers could strengthen the composite in multiple directions, rather than only along the fiber longitudinal directions. The annealing process promoted the Ni coating to react with and to diffuse into the matrix, resulted in an obvious increase of the bending strength. | Junjia Zhang Shichao Liu Yiping Lu Li Jiang Yubo Zhang Tingju Li | 2017 | Journal of Materials Science & Technology2017，33，7： | 3 |
| 12 | Effects of Standoff Distance on Magnetic Pulse Welded Joints Between Aluminum and Steel Elements in Automobile Body显示文摘In industrial production,the standoff distance of magnetic pulse welding(MPW)is a critical parameter as it directly affects welding quality.However,the effects of standoff distance on the physical properties of MPW joints have not been investi-gated.Therefore,in this study,aluminum alloy(AA5182)sheets and high-strength low-alloy steel(HC340LA)sheets were welded through MPW at a discharge energy of 20 kJ,under various standoff distances.Thereafter,mechanical tests were performed on the MPW joints,and the results indicate that there is a significant change in the shear strength of the AA5182/HC340LA-welded joints with respect to the standoff distance.When the standoff distance ranges from 0.8 to 1.4 mm,the strength of the joint is higher than that of the base AA5182 sheet.Microscopic observations were conducted to analyze the interfacial morphology,element diffusion behavior,and microdefects on the welding interface of the AA5182/HC340LA joints.The AA5182/HC340LA joint with a standoff distance of 1.4 mm possesses the longest welded region and the largest interfacial wave.This interfacial wave pattern is suitable for achieving MPW joints with high shear strengths. | Junjia Cui Shaoluo Wang Wei Yuan Guangyao Li | 2020 | Automotive Innovation2020，3，3： | 3 |
| 13 | Reservoir Porosity Measurement Uncertainty and its Influence on Shale Gas Resource Assessment显示文摘Reservoir porosity is a critical parameter for the process of unconventional oil and gas resources assessment. It is difficult to determine the porosity of a gas shale reservoir, and any large deviation will directly reduce the credibility of any shale gas resources evaluation. However, there is no quantitative explanation for the accuracy of porosity measurement. In this paper, measurement uncertainty, an internationally recognized index, was used to evaluate the results of porosity measurement of gas shale plugs, and its impact on the credibility of shale gas resources assessment was determined. The following conclusions are drawn:(1) the measurement uncertainty of porosity of a shale plug is 1.76%–3.12% using current measurement methods, the upper end of which is too large to be acceptable. It is suggested that the measurement uncertainty should be factored into the standard helium gas injection porosity determination experiment, and the uncertainty should be less than 2.00% when using a high-precision pressure gauge;(2) in order to reduce the risk for exploration and decision-making, attention should be paid to the large uncertainty(30% at least) of shale gas resource assessment results, sometimes with corrections being made based on the practical considerations;(3) a pressure gauge with an accuracy of 0.25% of the full scal cannot meet the requirements of porosity measurement, and a high-precision plug cutting method or high-precision bulk volume measurement method such as one using 3 D scanning, is recommended to effectively reduce porosity uncertainty;(4) the method and process for evaluating the measurement uncertainty of gas shale porosity could also be referred for assessment of experimental quality by other laboratories. | TIAN Hua ZOU Caineng LIU Shaobo HONG Feng FAN Junjia GUI Lili HAO Jiaqing | 2020 | Acta Geologica Sinica(English Edition)2020，94，2： | 2 |
| 14 | Four COVID-19 Cases of New Variant B.1.351 First Emerging in South Africa in Chinese Passengers on Same Flight-Shenzhen,China,January 2021显示文摘At 04∶50 on January 1,2021,a 36-year-old Chinese project manager(Case A),a 29-year-old Chinese worker(Case B),and a 53-year-old Chinese businessman(Case C)returned from Africa(Case A and B from South Africa and Case C from Lesotho)on the same flight and tested coronavirus disease 2019(COVID-19)RNA positive by real-time polymerase chain reaction(PCR)by Baoan District People’s Hospital.Shenzhen CDC received their oral nasopharyngeal swabs packages from the hospital and retested COVID-19 RNA positive at 09∶50.Meanwhile,Case D. | Cong Cheng Lei Wang Ziquan Lyu Bo Peng Yinghui Li Dongfeng Kong Le Zuo Xiaomin Zhang Chao Yang Weiwen Liu Jia Wan Yijun Tang Junjia He Ying Wen Shule Xu Weihua Wu Ying Chen Guangnan Liu Junjie Xia Xuan Zou Renli Zhang Qinghua Hu Shujiang Mei Tiejian Feng | 2021 | China CDC weekly2021，3，8： | 2 |
| 15 | Predictions ofthe mechanical properties and microstructure evolution of highstrength steel in hot stamping显示文摘 | Cui Junjia Lei Chengxi Xing Zhongwen | 2012 | Journal of Materials Engi-neering and Performance2012，22，11： | 1 |
| 16 | Influ- ence of acrylic impact modifier on plasticized polylactide blown films显示文摘 | Huilimlg Zhang Hongyu Hang Junjia Bian | 2014 | Polymer International2014，63，6： | 1 |
| 17 | Metallurgical Aspects of Arc-remelted CuCr Contact Materials 显示文摘 | HE Junjia ZOU Jiyan | 1998 | Discharges and Electrical Insulation in Vacuum1998，2，： | 1 |
| 18 | Structural analysis of glyco- gen - like poly - saccharides having macrophage - activating ac- tivity in extracts of Lentinula edodes mycelia显示文摘 | HIROAKIK JUNJIA SATOMIN | 2010 | J Nat Med2010，，64： | 1 |
| 19 | Observation of leader development in rod-rod air gaps under negative switching impulse显示文摘 | Yaoheng Xie Hengxin He Junjia He | 2013 | Japanese Journal of Applied Physics2013，52，09： | 1 |
| 20 | The effect of corona discharge on leader initiation in long air gaps 显示文摘 | Yaoheng Xie Junjia He Chuanqi Wu | 2014 | IEEE Transactions on Plasma Science2014，42，4： | 1 |
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