|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Stability of roof structure and its control in steeply inclined coal seams显示文摘To improve the effectiveness of control of surrounding rock and the stability of supports on longwall topcoal caving faces in steeply inclined coal seams, the stability of the roof structure and hydraulic supports was studied with physical simulation and theoretical analysis. The results show that roof strata in the vicinity of the tail gate subside extensively with small cutting height, while roof subsidence near the main gate is relatively assuasive. With increase of the mining space, the caving angle of the roof strata above the main gate increases. The characteristics of the vertical and horizontal displacement of the roof strata demonstrate that caved blocks rotate around the lower hinged point of the roof structure, which may lead to sliding instability. Large dip angle of the coal seam makes sliding instability of the roof structure easier.A three-hinged arch can be easily formed above both the tail and main gates in steeply inclined coal seams. With the growth in the dip angle, subsidence of the arch foot formed above the main gate decreases significantly, which reduces the probability of the roof structure becoming unstable as a result of large deformation, while the potential of the roof structure's sliding instability above the tail gate increases dramatically. | Li Xiaomeng Wang Zhaohui Zhang Jinwang | 2017 | International Journal of Mining Science and Technology2017，27，2： | 21 |
| 2 | Three-dimensional experimental study of loose top-coal drawing law for longwall top-coal caving mining technology显示文摘Based on the loose medium flow field theory, the loose top-coal drawing law of longwall top-coal caving(LTCC) mining technology is studied by using self-developed three-dimensional(3D) test device. The loose top-coal drawing test with shields and the controlled test without shields are performed in the condition without any boundary effect. Test results show that shields will cause reduction in drawing volume of coal in the LTCC mining. The deflection phenomenon of drawing body is also observed in the controlled test, which is verified that the deflection of drawing body is caused by shield. It is found that the deflection angle decreases with increasing caving height, with the maximum value of atailand the minimum value of 0. In addition, the formula to calculate the drawing volume is proposed subsequently.The deflection of drawing body is numerically simulated using particle flow code PFC3 Dand the proposed formula to calculate drawing volume in LTCC is also verified. | Jiachen Wang Jinwang Zhang Zhengyang Song Zhaolong Li | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 12 |
| 3 | A Single-cell Transcriptome Atlas of Cashmere Goat Hair Follicle Morphogenesis显示文摘Cashmere,also known as soft gold,is produced from the secondary hair follicles(SHFs)of cashmere goats.The number of SHFs determines the yield and quality of cashmere;therefore,it is of interest to investigate the transcriptional profiles present during cashmere goat hair follicle development.However,mechanisms underlying this development process remain largely unexplored,and studies regarding hair follicle development mostly use a murine research model.In this study,to provide a comprehensive understanding of cellular heterogeneity and cell fate decisions,single-cell RNA sequencing was performed on 19,705 single cells of the dorsal skin from cashmere goat fetuses at induction(embryonic day 60;E60),organogenesis(E90),and cytodifferentiation(E120)stages.For the first time,unsupervised clustering analysis identified 16 cell clusters,and their corresponding cell types were also characterized.Based on lineage inference,a detailed molecular landscape was revealed along the dermal and epidermal cell lineage developmental pathways.Notably,our current data also confirmed the heterogeneity of dermal papillae from different hair follicle types,which was further validated by immunofluorescence analysis.The current study identifies different biomarkers during cashmere goat hair follicle development and has implications for cashmere goat breeding in the future. | Wei Ge Weidong Zhang Yuelang Zhang Yujie Zheng Fang Li Shanhe Wang Jinwang Liu Shaojing Tan Zihui Yan Lu Wang Wei Shen Lei Qu Xin Wang | 2021 | Genomics, Proteomics & Bioinformatics2021，19，3： | 3 |
| 4 | Impact of longwall mining on groundwater above the longwall panel in shallow coal seams显示文摘Since longwall mining causes subsidence through the overlying strata to the ground surface, the surface water and groundwater above the longwall panels may be affected and drained into the lower levels.Therefore, loss or interruption of streams and overburden aquifers is a common concern in coal industry.This paper analyzed the potential effects of longwall mining on subsurface water system in shallow coal seam. In order to monitor different water level fluctuations throughout the mining period, three water wells were drilled down to the proposed deformation zone above the longwall panel. A GGU-SS-FLOW3 D model was used to predict water table contours for the periods of pre- and post-mining conditions. The field data from the three water wells were utilized to calibrate the model. The field test and numerical model can help to better understand the dewatering of shallow aquifers and surface waters related to ground subsidence from longwall mining in shallow coal seam. | Yang Li Syd S.Peng Jinwang Zhang | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 3 |
| 5 | A microfluidic all-vanadium photoelectrochemical cell with a full-spectrum-responsive Ti2O3 photoanode for efficient solar energy storage显示文摘The all-vanadium photoelectrochemical cell is one of the promising solar energy storage technologies. However, conventional photoanodes surfer from low solar energy utilization efficiency as a result of narrow spectrum response and poor mass transfer.Hence, in this study, a microfluidic all-vanadium photoelectrochemical cell with a full-spectrum-responsive Ti2O3 photoanode was proposed for efficient solar energy storage. Experimental results indicated that the Ti2O3 photoanode responded to almost the full spectrum of sunlight and exhibited excellent photoresponse and operation stability, which facilitated efficient solar energy utilization. Additionally, the effects of the light intensity, vanadium ion concentration, and electrolyte flow rate were studied. It was found that increasing the light intensity and vanadium ion concentration and reducing the electrolyte flow rate promoted photoelectrochemical reactions and thus improved the solar energy storage performance. The obtained results demonstrate the feasibility and superiority of using Ti2O3 as the photoanode for a photoelectrochemical cell to achieve efficient solar energy storage. | LIN YingYing FENG Hao CHEN Rong YE DingDing ZHANG Biao YU YouXu LI JinWang | 2019 | Science China(Technological Sciences)2019，62，9： | 3 |
| 6 | The diagnostic value of computed tomography histogram analysis in thyroid malignant solitary nodules showing coarse calcifications显示文摘 | Zhang Lexing Wei Peiying Han Zhijiang Xiang Jingjing Ding Jinwang Luo Dingcun Li Mingkui | 2018 | 中华内分泌外科杂志2018，12，4： | 2 |
| 7 | Cognitive factors associated with the willingness for HIV testing among pregnant women in China显示文摘 | Li Chunrong Yang Liu Kong Jinwang | 2014 | Chinese Medical Journal2014，，19： | 2 |
| 8 | Numerical investigation on the caving mechanism with different standard deviations of top coal block size in LTCC显示文摘The size distribution of the broken top coal blocks is an important factor,affecting the recovery ratio and the efficiency of drawing top coal in longwall top coal caving(LTCC)mining panel.The standard deviation of top coal block size(dt)is one of the main parameters to reflect the size distribution of top coal.To find the effect of dt on the caving mechanism,this study simulates experiments with 9 different dt by using discrete element software PFC.The dt is divided into two stages:uniform distribution stage(UDS)whose dt is less than 0.1(Schemes 1–5),and nonuniform distribution stage(NDS)whose dt is more than 0.1(Schemes 6–9).This research mainly investigates the variation of recovery ratio,drawing body shape,boundary of top coal,and contact force between particles in the two stages,respectively.The results showed that with the increasing dt,the recovery ratio of the panel increases first and then decreases in UDS.It is the largest in Scheme 3,which mainly increases the drawing volume at the side of starting drawing end.However,the recovery ratio decreases first and then increases quickly in NDS,and it is the largest in Scheme 9,where the drawing volume at the side of finishing drawing end are relatively higher.In UDS,the major size of top coal is basically medium,while in NDS,the size varies from medium to small,and then to large,with a distinct difference in shape and volume of the drawing body.When the major size of top coal is medium and small,the cross-section width of the initial boundary of top coal at each height is relatively small.Conversely,when the top coal size is large,the initial boundary of top coal has a larger opening range,the rotating angle of lower boundary is relatively small in the normal drawing stage,which is conducive to the development of drawing body and reduces the residual top coal,and the maximum particle velocity and the particles movement angle are both larger.This study lays a foundation for the prediction of recovery ratio,and suggests that the uniform top coal is more manageable and has a larger recovery ratio. | Jiachen Wang Weijie Wei Jinwang Zhang Brijes Mishra Ang Li | 2020 | International Journal of Mining Science and Technology2020，30，5： | 1 |
| 9 | Synthesis of SiC precursors by a two - step sol - gel process and their conversion to SiC powders 显示文摘 | Jinwang Li Jiemo Tian Limin Dong | 2000 | Journal of the European Ceramic Society2000，77，： | 1 |
| 10 | Crystallization of lead zirconate titanate without passing through pyrochlore by new solution process显示文摘 | Hiroyuki Kameda Jinwang Li Dam Hieu Chi Ayumi Sugiyama Koichi Higashimine Tomoya Uruga Hajime Tanida Kazuo Kato Toshihiko Kaneda Takaaki Miyasako Eisuke Tokumitsu Tadaoki Mitani Tatsuya Shimoda | 2012 | Journal of the European Ceramic Society2012，，8： | 1 |
| 11 | THE λ-GROBNER BASES UNDER POLYNOMIAL COMPOSITION显示文摘 | Jinwang LIU Dongmei LI Xiaosong CHEN | 2007 | Journal of Systems Science & Complexity2007，20，4： | 1 |
| 12 | Synthesis of SiC precursors by a two-step sol-gel process and their conversion to SiC powders显示文摘 | LI Jinwang TIAN Jiemo DONG Limin | 2000 | Journal of the European Ceramic Society2000，20，11： | 1 |
| 13 | Experimental study oncapillary pumping performance of porous wicks for loopheat pipe显示文摘 | Li Jinwang Zou Yong Cheng Lin | 2010 | Experimental Thermal and Fluid Science2010，34，8： | 1 |
| 14 | Numerical and theoretical investigations of the effect of the gangue-coal density ratio on the drawing mechanism in longwall top-coal caving显示文摘Discrete element calculations of the top-coal drawing process for diferent gangue-coal density ratios were conducted to investigate the efect of the gangue-coal density ratio on the drawing mechanism in longwall top-coal caving.The efects were analyzed for the drawing body,the top-coal boundary,and the recovery of top coal.The results show that for increasing density ratio,the initial drawing body on the goaf side is farther away from the drawing support and its width and volume gradually increase.The upper part of the sickle-shaped drawing body extends near the initial drawing body with increasing density ratio in the normal cycling stage,and the distance from the drawing body to the initial drawing body is its maximum width.The larger the density ratio,the smaller the height of the top coal above the goaf at the end of the initial drawing process.The height of the top-coal boundary decreases with increasing density ratio,until it reaches a limit.In a normal cycle,due to hysteretic development,the top-coal boundary moves toward the goaf until the density ratio is approximately 2.0,which is consistent with the physical experiment results.Finally,increasing the advance length of the working face is benefcial for increasing the overall recovery of top coal. | Jinwang Zhang Dongliang Cheng Yinchao Yang Weijie Wei Zhaolong Li Zhengyang Song | 2022 | International Journal of Coal Science & Technology2022，9，2： | 0 |
| 15 | GVW ALGORITHM OVER PRINCIPAL IDEAL DOMAINS显示文摘GVW algorithm was given by Gao,Wang,and Volny in computing a Grbner bases for ideal in a polynomial ring,which is much faster and more simple than F5.In this paper,the authors generalize GVW algorithm and present an algorithm to compute a Grbner bases for ideal when the coefficient ring is a principal ideal domain. | LI Dongmei LIU Jinwang LIU Weijun ZHENG Licui | 2013 | Journal of Systems Science & Complexity2013，26，4： | 0 |
| 16 | The Generalized Serre Problem over K-Hermite Rings显示文摘This paper investigates the completion and the zero prime factorization for matrices over a K-Hermite ring. The authors have generalized Kaplansky's related results, solved similar Lin-Bose problem and generalized Serre problem over a K-Hermite ring. | LIU Jinwang LI Dongmei | 2017 | Journal of Systems Science & Complexity2017，30，2： | 0 |
| 17 | A Grobner Basis Algorithm for Ideals over Zero-Dimensional Valuation Rings显示文摘Zero-dimensional valuation rings are one kind of non-Noetherian rings.This paper investigates properties of zero-dimensional valuation rings and prove that a finitely generated ideal over such a ring has a Grobner basis.The authors present an algorithm for computing a Gr?bner basis of a finitely generated ideal over it.Furthermore,an interesting example is also provided to explain the algorithm. | LI Dongmei LIU Jinwang | 2021 | Journal of Systems Science & Complexity2021，34，6： | 0 |
| 18 | A New Signature-Based Algorithms for Computing Gr?bner Bases显示文摘Gao,Volny and Wang(2010) gave a simple criterion for signature-based algorithms to compute Grobner bases.It gives a unified frame work for computing Grobner bases for both ideals and syzygies,the latter is very important in free resolutions in homological algebra.Sun and Wang(2011) later generalized the GVW criterion to a more general situation(to include the F5 Algorithm).Signature-based algorithms have become increasingly popular for computing Grobner bases.The current paper introduces a concept of factor pairs that can be used to detect more useless J-pairs than the generalized GVW criterion,thus improving signature-based algorithms. | ZHENG Licui LIU Jinwang LIU Weijun LI Dongmei | 2015 | Journal of Systems Science & Complexity2015，28，1： | 0 |
| 19 | Normal projection: deterministic and probabilistic algorithms显示文摘我们考虑下列问题:为在一个 n 维的空格的许多点,发现线性设计印射点到扎根的域以便不同的点被印射到不同的值。如此的设计被称为正常并且为转变为代数学的变化正常位置是有用的。点可以明确地或含蓄地被给,设计的系数来自扎根的地的子集 S。如果子集 S 是小的,这个问题可能是难的。这份报纸处理相对大的 S,当时,一个确定的算法被给点明确地被给,并且为成功概率的更低的界限从在文学为一个概率的算法被给。 | Dongmei LI Jinwang LIU Weijun LIU | 2014 | Frontiers of Mathematics in China2014，9，1： | 0 |
| 20 | Synthesis of a new iron(Ⅲ) porphyrin acrylate-styrene copolymer and its catalysis for hydroxylation of cyclohexane显示文摘A new iron(III)porphyrin acrylate-styrene copo-lymer,P[(PorFe)A-S],was synthesized by the reaction of iron(III)porphyrin acrylate with styrene and characterized by UV-Vis,Infrared spectra(IR),inductively coupled plasma-atomic emission spectrometry(ICP)and molecular weight determination.Its catalytic activity in the hydroxylation of cyclohexane for model cytochrome P450 in the P[(PorFe)A-S]-O_(2)–ascrobate-thiosalicylic acid system has been studied.It was found that the P[(PorFe)A-S]has a higher catalytic activity than non-supported iron(III)porphyrin and its high catalytic activity remained in reuse.The catalytic activity of P[(PorFe)A-S]was discussed in the view of the microenvi-ronment of iron(III)porphyrin.It is proposed that the cata-lytic activity of the P[(PorFe)A-S]may be further enhanced by construction of a homophase catalytic system containing the iron(III)porphyrin acrylate-styrene copolymer. | YU Hancheng CHEN Xianli LI Xixian HUANG Jinwang JI Liangnian | 2007 | Frontiers of Chemical Science and Engineering2007，1，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员