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| 1 | Application of pressure relief and permeability increased by slotting a coal seam with a rotary type cutter working across rock layers显示文摘Pressure relief to increase permeability significantly improves gas extraction efficiency from coal seams.In this paper we report results from simulations using FLAC 3D code to analyze changes in coal displacement and stress after special drill slots were formed.We investigated the mechanism of pressure relief and permeability increase in a high-gas and low-permeability coal seam through the modeling of gas flow.This allows the development of the technology.Slotting across rock layers in the coal seam with a rotary type cutter was then applied in the field.The results show that pressure relief and permeability increases from slotting the coal seam can increase the transport and the fracture of the coal.This expands the range of pressure relief from the drilling and increases the exposed area of the seam.The total quantity of gas extracted from slotted bore holes was three times that seen with ordinary drilling.The concentration of gas extracted from the slotted drills was from two to three times that seen using ordinary drills.The gas flow was stable at 80%.Improved permeability and more efficient gas extraction are the result of the slotting.The roadway development rate is increased by 30-50% after gas drainage.This technology diminishes the lag between longwall production and roadway development and effectively prevents coal and gas outburst,which offers the prospect of broad application. | Shen Chunming Lin Baiquan Meng Fanwei Zhang Qizhi Zhai Cheng | 2012 | International Journal of Mining Science and Technology2012，22，4： | 10 |
| 2 | Technology and application of pressure relief and permeability increase by jointly drilling and slotting coal显示文摘Difficulties with soft coal seams having a high gas content and high stress levels can be addressed by a technology of pressure relief and permeability increase.Slotting the seam by auxiliary drilling with a water jet that breaks the coal and slots the coal seam during the process of retreat drilling achieves pressure relief and permeability increase.Improved efficiency of gas extraction from a field test,high gas coal seam was observed.Investigating the theory of pressure relief and permeability increase required analyzing the characteristics of the double power slotting process and the effects of coal pressure relief and permeability increase.The influence of confining pressure on coal physical properties was examined by using FLAC3D software code to simulate changes of coal stress within the tool destruction area.The double power joint drilling method was modeled.Field experiments were performed and the effects are analyzed.This research shows that there is an ''islanding effect'' in front of the joint double power drill and slotting equipment.The failure strength of the coal seam is substantially reduced within the tool destruction area.Drilling depths are increased by 72% and the diameter of the borehole is increased by 30%.The amount of powdered coal extracted from the drill head increases by 17 times when using the new method.A 30 day total flow measurement from the double power drilled and slotted bores showed that gas extraction increased by 1.3 times compared to the standard drilled bores.Gas concentrations increased from 30% to 60% and were more stable so the overall extraction efficiency increased by a factor of two times. | Lin Baiquan Zhang Jianguo Shen Chunming Zhang Qizhi Sun Chen | 2012 | International Journal of Mining Science and Technology2012，22，4： | 7 |
| 3 | Induced drill-spray during hydraulic slotting of a coal seam and its influence on gas extraction显示文摘Hydraulic slotting can induce drill spray in a gassy,low permeability coal seam.This then influences subsequent gas extraction.This paper describes the drill spray phenomenon from a mechanical perspective and analyzes the effects of water jet damage during slotting.A simulation of the stresses around the drill hole and slot was prepared using FLAC-3D code.It helps explain the induction of drill spray during hydraulic slotting.The stress concentration around the bore increases as the diameter of the hole increases.As the hole enlarges the variation in stress also increases,which introduces an instability into the coal.This allows easy breaking and removal of the coal.Destruction of the coal structure by the water jet is the major factor causing drill spray.Energy stored as either strain or gas pressure is released by the water jet and this causes the coal to fracture and be expelled from the hole.Field tests showed the effect on gas extraction after slotting with drill spray.The concentration of gas increases after drilling.Compared to conventional techniques,the hydraulic slotted bore gives a gas concentration three times higher and has an effective range twice as far.This makes the gas extraction process more efficient and allows reduced construction effort. | Shen Chunming Lin Baiquan Zhang Qizhi Yang Wei Zhang Lianjun | 2012 | International Journal of Mining Science and Technology2012，22，6： | 7 |
| 4 | Big graph search: challenges and techniques显示文摘 | Shuai MA Jia LI Chunming HU Xuelian LIN Jinpeng HUAI | 2016 | Frontiers of Computer Science2016，10，3： | 5 |
| 5 | Rheological Properties of Hydrophobically Associating Polyacrylamide Solution显示文摘A temperature-resistant, salt-tolerant polyacrylamide, hydrophobically associating polymer (HAP), was synthesized in the State Key Laboratory of Heavy Oil Processing. The rheological behavior of HAP solution was investigated by means of flow experiments in porous media and by using a HAAKE RS600 rheometer. The results of Nuclepore membrane filtration showed that filtration time increased sharply when the critical association concentration was reached. Shear rate had a greater impact on viscosity and shear stress with increasing HAP concentration. The HAP solution with a concentration of 100 mg/L (salinity 32,868 mg/L) exhibited negative thixotropy. However, at the same salinity the HAP solution showed thixotropy and its viscosity became greater when the polymer concentration increased to 1,500 mg/L. The flow experiments in cemented core samples indicated that the resistance factor and residual resistance factor of the HAP solution were 31.8 and 12 when polymer concentration and salinity were 1,500 mg/L, 32,868 mg/L at 85℃ respectively, which is favorable for flooding application. Such factors of partially hydrolyzed polyacrylamide 3530S were merely 3.14 and 1.71, so it could not be applied to polymer flooding in the oilfield with high temperature and high salinity. | Ren Kun Wang Jinlan Lin Meiqin Xu Chunming | 2006 | Petroleum Science2006，3，2： | 5 |
| 6 | Performance Evaluation for SDN Deployment: an Approach Based on Stochastic Network Calculus显示文摘The Open Flow implementations(SDNs) have been deployed increasingly on varieties of networks in research institutions as well as commercial institutions. To develop an Open Flow implementation, it is required to understand the performance of the network. A few benchmark tools(e.g., Cbench and OFlops) can be used to measure the network performance, while these tools take considerable time to simulate traffic behaviors and generate the required results,therefore extending the development time. In this paper, we present an analytical model, which is based on stochastic network calculus theory, for evaluating the performance of switch to controller.The previous studies show that stochastic network calculus can provide realistic emulation of real network traffic behaviors. Our model is evaluated by using both simulation tool and realistic testbed.The results show the stochastic network calculus based analysis model can realistically measure the network performance of the end-to-end properties between controller and switch. | LIN Changting WU Chunming HUANG Min WEN Zhenyu ZHENG Qiuhua | 2016 | China Communications2016，13，S1： | 4 |
| 7 | Tool Orientation Optimization and Path Planning for 5-Axis Machining显示文摘Tool path generation is a fundamental problem in 5-axis CNC machining, which consists of tool orientation planning and cutter-contact(CC) point planning. The planning strategy highly depends on the type of tool cutters. For ball-end cutters, the tool orientation and CC point location can be planned separately;while for flat end cutters, the two are highly dependent on each other. This paper generates a smooth tool path of workpiece surfaces for flat end mills from two stages: Computing smooth tool orientations on the surface without gouging and collisions and then designing the CC point path. By solving the tool posture optimization problem the authors achieve both the path smoothness and the machining efficiency. Experimental results are provided to show the effectiveness of the method. | YUAN Chunming MI Zhenpeng JIA Xiaohong LIN Fengming SHEN Liyong | 2021 | Journal of Systems Science & Complexity2021，34，1： | 3 |
| 8 | Boosting of reversible capacity delivered at a low voltage below 0.5 V in mildly expanded graphitized needle coke anode for a high-energy lithium ion battery显示文摘The rate performance and cycle stability of graphitized needle coke(GNC)as anode are still limited by the sluggish kinetics and volume expansion during the Li ions intercalation and de-intercalation process.Especially,the output of energy density for lithium ion batteries(LIBs)is directly affected by the delithiation capacity below 0.5 V.Here,the mildly expanded graphitized needle coke(MEGNC)with the enlarged interlayer spacing from 0.346 to 0.352 nm is obtained by the two-step mild oxidation intercalation modification.The voltage plateau of MEGNC anode below 0.5 V is obviously broadened as compared to the initial GNC anode,contributing to the enhancement of Li storage below the low voltage plateau.Moreover,the coin full cell and pouch full cell configured with MEGNC anode exhibit much enhanced Li storage ability,energy density and better cycling stability than those full cells configured with GNC and commercial graphite anodes,demonstrating the practical application value of MEGNC.The superior anode behaviors of MEGNC including the increased effective capacity at low voltage and superior cyclic stability are mainly benefited from the enlarged interlayer spacing,which not only accelerates the Li ions diffusion rate,but also effectively alleviates the volume expansion and fragmentation during the Li ions intercalation process.In addition,the above result is further confirmed by the density functional theory simulation.This work provides an effective modification strategy for the NC-based graphite to enhance the delithiation capacity at a low voltage plateau,dedicated to improving the energy density and durability of LIBs. | Dong Sun Lu Zhao Zhihua Xiao Kai Zhao Rundan Lin Hongmei Song Xilu Zhang Xinlong Ma Chong Peng Xiaoqiao Huang Xingxun Li Jinsen Gao Chunming Xu | 2022 | Journal of Energy Chemistry2022，31，11： | 2 |
| 9 | Dynamic Backup Sharing Scheme of Service Function Chains in NFV显示文摘Service function chains(SFC)mapping takes the responsibility for managing virtual network functions(VNFs).In SFC mapping,existing solutions duplicate VNFs with redundant instances to provide high availability in response to failures.However,as a compromise,these solutions result in high resource consumption due to device maintenance.In this paper,we propose a novel method named dynamic backup sharing(DBS)that allows SFCs to dynamically share backups to reduce resource consumption.DBS formulates the problem of sharing backups among different VNFs as an integer linear programming(ILP).Thereafter,we design a novel online algorithm based on dynamic programming to solve the problem.The experimental results indicate that DBS outperforms state-ofthe-art works by reducing resource consumption and improving the number of accepted requests. | Dong Zhang Zhifan Zheng Xiang Lin Xiang Chen Chunming Wu | 2022 | China Communications2022，19，5： | 2 |
| 10 | Location set cover- ing for waste resource recycling centers in Taiwan 显示文摘 | Lin Ye Chunming Ye Yi-Fei Chuang | 2011 | Re- sources Conservation and Recycling2011，55，11： | 1 |
| 11 | Stimulated Raman scattering mode in highly elliptical core optical fiber显示文摘 | Wang Zhaomin Gu Chunming Lin Jingquan | 1995 | Science in China (E)1995，30，1： | 1 |
| 12 | Evolution of micro-structures and mechanical properties of AZ31B magnesium alloy weldment with active oxide fluxes and GTAW process 显示文摘 | Lin Chunming Liu Jujen Tsai Hsienlung | 2011 | Journal of the Chinese Institute of Engineers2011，34，8： | 1 |
| 13 | Dexmedetomidine and meperidine additively reduce the shivering threshold in humans 显示文摘 | Doufas AG Lin Chunming Suleman MI | 2003 | Stroke2003，34，5： | 1 |
| 14 | Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: Implications for the tectonic evolution of central Asia显示文摘 | Wenjiao Xiao Chunming Han Chao Yuan Min Sun Shoufa Lin Hanlin Chen Zilong Li Jiliang Li Shu Sun | 2007 | Journal of Asian Earth Sciences2007，，2： | 1 |
| 15 | Transcriptome shock in an interspecific F1 triploid hybrid of Oryza revealed by RNA sequencing显示文摘Interspecific hybridization is a driving force in evolution and speciation of higher plants. Interspecific hybridization often induces immediate and saltational changes in gene expression,a phenomenon collectively termed 'transcriptome shock'. Although transcriptome shock has been reported in various plant and animal taxa,the extent and pattern of shock-induced expression changes are often highly idiosyncratic,and hence entails additional investigations. Here,we produced a set of interspecific F_1 triploid hybrid plants between Oryza sativa,ssp. japonica(2n=2x=24,genome AA) and the tetraploid form of O. punctata(2n=4x=48,genome,BBCC),and conducted RNA-seq transcriptome profiling of the hybrids and their exact parental plants. We analyzed both homeolog expression bias and overall gene expression level difference in the hybrids relative to the in silico 'hybrids'(parental mixtures). We found that approximately 16%(2,541) of the 16,112 expressed genes in leaf tissue of the F_1 hybrids showed nonadditive expression, which were specifically enriched in photosynthesis-related pathways. Interestingly,changes in the maternal homeolog expression, including non-stochastic silencing, were the major causes for altered homeolog expression partitioning in the F_1 hybrids. Our findings have provided further insights into the transcriptome response to interspecific hybridization and heterosis. | Ying Wu Yue Sun Xutong Wang Xiuyun Lin Shuai Sun Kun Shen Jie Wang Tingting Jiang Silin Zhong Chunming Xu Bao Liu | 2016 | Journal of Integrative Plant Biology2016，58，2： | 1 |
| 16 | Evolution of micro-structures and mechanical properties of AZ31B magnesium alloy weldment with active oxide fluxes and GTAW process显示文摘 | Lin Chunming Liu Jujen Tsai Hsienlung | 2011 | Journal of the Chinese Institute of Engi- neers2011，34，8： | 1 |
| 17 | Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: Implications for the tectonic evolution of central Asia显示文摘 | Wenjiao Xiao Chunming Han Chao Yuan Min Sun Shoufa Lin Hanlin Chen Zilong Li Jiliang Li Shu Sun | 2007 | Journal of Asian Earth Sciences2007，，2： | 1 |
| 18 | Mesoporous Y zeolite with homogeneous aluminum distribution obtained by sequential desilication–dealumination and its performance in the catalytic cracking of cumene and 1,3,5-triisopropylbenzene显示文摘 | Zhengxing Qin Baojian Shen Xionghou Gao Feng Lin Baojie Wang Chunming Xu | 2010 | Journal of Catalysis2010，，2： | 1 |
| 19 | Location set covering for waste resource recycling centers in Taiwan显示文摘 | Lin Ye Chunming Ye Yi-Fei Chuang | 2011 | Resources Conservation & Recycling2011，，11： | 1 |
| 20 | Evolutionof micro-structures and mechanical properties of AZ31Bmagnesium alloy weldment with active oxide fluxes andGTAW process显示文摘 | Lin Chunming Liu Jujen Tsai Hsienlung | 2011 | Journal of the Chinese Institute of Eng-ineers2011，34，8： | 1 |
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