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Phenomenon of methane driven caused by hydraulic fracturing in methane-bearing coal seams

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International Journal of Mining Science and Technology 2016年第5期26卷 919-927页

作者： Huang Bingxiang cheng Qingying chen shuliang Key Laboratory of Deep Coal Resource Mining Ministry of Education of China China University of Mining & Technology School of Safety Engineering China University of Mining & Technology

The methane concentration of the return current will always be enhanced to a certain degree when hydraulic fracturing with bedding drilling is implemented to a gassy coal seam in an underground coal mine. The methane in coal seam is driven out by hydraulic fracturing. Thus, the phenomenon is named as methane driven effect of hydraulic fracturing. After deep-hole hydraulic fracturing at the tunneling face of the gassy coal seam, the coal methane content exhibits a ‘‘low-high-low" distribution along excavation direction in the following advancing process, verifying the existence of methane driven caused by hydraulic fracturing in methane-bearing coal seam. Hydraulic fracturing causes the change of pore-water and methane pressure in surrounding coal. The uneven distribution of the pore pressure forms a pore pressure gradient. The free methane migrates from the position of high pore(methane) pressure to the position of low pore(methane) pressure. The methane pressure gradient is the fundamental driving force for methane-driven coal seam hydraulic fracturing. The uneven hydraulic crack propagation and the effect of time(as some processes need time to complete and are not completed instantaneously) will result in uneven methane driven. Therefore, an even hydraulic fracturing technique should be used to avoid the negative effects of methane driven; on the other hand, by taking fully advantage of methane driven, two technologies are presented.

关键词： Methane-bearing coal seam Hydraulic fracturing Pore pressure gradient Methane driven

Traceless photodegradable polymer cocoons for universal protein delivery and light-controlled gene editing

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Science China Chemistry 2024年第2期67卷 664-676页

作者： Huaibin Yu Meron Tsegay Kifle Lili chen Feihong Xiong Yan Zhang Shangbang Gao Wei Hou shuliang chen Weining Zhao Yuzhou Wu Hubei Engineering Research Center for Biomaterials and Medical Protective Materials Hubei Key Laboratory of Bioinorganic Chemistry&Materia MedicaKey Laboratory of Material Chemistry for Energy Conversion and StorageMinistry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou450000China College of Life Science and Technology Huazhong University of Science and Technology(HUST)Wuhan430074China Institute of Medical Virology School of Basic Medical SciencesWuhan UniversityWuhan430071China College of Pharmacy Shenzhen Technology UniversityShenzhen518118China

Polymer conjugation was found highly valuable in clinic to improve the bioavailability of protein ***,it is still a tremendous challenge to achieve a complete release of original proteins from the conjugated hybrid under external stimulus to recover active proteins in the targeted ***,we report a general light-controlled protein delivery methodology by weaving a photodegradable polymer cocoon around proteins,which could reliably protect them from degradation in the dark while efficiently releasing them under illumination without any residual *** surface charge of the polymer shell is easily tunable to facilitate efficient cell *** versatility of this strategy is demonstrated by the delivery of the Cas9/sg RNA complex that realized light-controlled gene editing both in vitro and in vivo,and such repertoire is of particular value in regard to minimizing the off-target toxicity of CRISPR-Cas9-based gene therapy.

关键词： photodegradable polymer-protein conjugate protein delivery light control gene editing

Evaluation of NBI absorption and fast ion stored energy to improve thermal energy confinement time calculation in EAST

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Plasma Science and Technology 2020年第2期22卷 54-59页

作者： Xiang GU Biao SHEN Jinping QIAN Siye DING Hongfei DU Youwen SUN Bingjia XIAO Bin WU Jinfang WANG Juan HUANG Jiale chen Kai LI Guoqiang LI Dalong chen shuliang chen Muquan WU Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China

The absorption of neutral beam power and the fast ion stored energy in EAST plasmas with neutral beam injection(NBI)is analyzed to improve the calculation of thermal energy confinement *** neutral beam power absorption and fast ion stored energy are systematically calculated using the TRANSP code,through the investigation of global parameters including plasma current,line averaged density and beam *** have shown that scaling laws for the NBI absorption coefficient and fast ion energy rate are obtained through statistical analysis.A comparison of the confinement improvement factor H98y2 with these new scaling laws against those assuming fixed coefficients is given.

关键词： thermal energy confinement time neutral beam absorption fast ion energy

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论姜夔与白石词

江汉论坛 2009年第3期 102-106页

作者：陈书良湖南省文史馆湖南商学院中文系

姜白石是中国文化史上不多见的多面性天才。白石属于江湖诗派,其词作深受江湖诗派文艺主张的影响。然而白石舍弃粗放而讲究精致,同时也在崇尚高雅格调的文化趣味中别含清淡乃至荒寒意趣。这是白石异于一般江湖诗人之处,亦是理解白石"清... 详细信息

姜白石是中国文化史上不多见的多面性天才。白石属于江湖诗派,其词作深受江湖诗派文艺主张的影响。然而白石舍弃粗放而讲究精致,同时也在崇尚高雅格调的文化趣味中别含清淡乃至荒寒意趣。这是白石异于一般江湖诗人之处,亦是理解白石"清空"、"骚雅"词风的关捩之处。

关键词：姜夔白石词江湖诗派

Research Progress on Genetic Diversity of Snap Bean(Phaseolus vulgaris)Germplasm Resources in China

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Agricultural Biotechnology 2022年第1期11卷 19-21页

作者： Hongbo GUAN shuliang chen chenglin E Xishan WANG Jing XIAO Institute of Economic Plants Jilin Academy of Agricultural SciencesChangchun 130033China

In this paper,we reviewed the classification,genetic diversity and planting and application of snap bean(Phaseolus vulgaris)germplasm resources in China at the present stage were,analyzed the bottleneck of snap bean research in China,and prospected the development trend of snap bean germplasm research in the *** the opportunity of the completion of the whole genome sequencing of kidney bean and the construction of high-density genetic map,it is necessary to strengthen the application of ISSR,SNP and other molecular methods and high-throughput proteomics to the study on the specific breeding of snap bean.

关键词： Snap bean Germplasm resources Genetic diversity

Effects of Cultivation Density,Fertilizer Type and Fertilizer Amount on Yield of Jicaidou No.1

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Agricultural Biotechnology 2022年第6期11卷 174-175页

作者： Xishan WANG shuliang chen chenglin E Hongbo GUAN Jing XIAO Economic Plants Research Institute Jilin Academy of Agricultural SciencesJilin 132000China

[Objectives]This study was conducted to explore the effects of planting density,fertilizer type and fertilizer amount on yield of Jicaidou No.1.[Methods]Three treatments of plant spacing,fertilizer type and fertilizer amount of Jicaidou No.1 were set up respectively to screen out the best combination mode.[Results]The best combination mode was:plant spacing 50 cm,fertilizer amount 1800 kg/hm^(2),and any one of the two fertilizers,as the difference between the two kinds of fertilizers was not significant.[Conclusions]This study provides a scientific basis for the standardized cultivation of kidney beans in Jilin Province.

关键词： Density Fertilization amount Type of fertilizer Jicaidou No.1

Research Progress in Spinach (Spinacia oleracea L.) Germplasm Resources

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Agricultural Biotechnology 2019年第5期8卷 31-36页

作者： Jiawen DONG shuliang chen chengling E Hongbo GUAN Xishan WANG Xiaohua SHI Jing XIAO Institute of Economic Botany Jilin Academy of Agricultural Sciences

Spinach is one of the main vegetable *** study of spinach germplasm resources is beneficial to discovering excellent genes and accelerating the breeding efficiency,thereby further promoting the development of the spinach *** this study,the origin,propagation,collection,preservation,genetic diversity and breeding status of spinach were reviewed,and the problems and prospects of spinach germplasm resources were put *** paper provides reference for the research and breeding of spinach germplasm resources.

关键词： Spinach Germplasm resources Collection and preservation Breeding Genetic diversity

Antenatal sonographic detection of wolffian DUCT cyst

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山东第一医科大学(山东省医学科学院)学报 1995年第2期 93-94页

作者： Song shuliang,Ding Jilian,chen yurong,Gao Yingjun(Affiliated Hospital,Taishan Medical College)

ＡＮＴＥＮＡＴＡＬＳＯＮＯＧＲＡＰＨＩＣＤＥＴＥＣＴＩＯＮＯＦＷＯＬＦＦＩＡＮＤＵＣＴＣＹＳＴＳｏｎｇＳｈｕｌｉａｎｇ，ＤｉｎｇＪｉｌｉａｎ，Ｃｈｅｎｙｕｒｏｎｇ，ＧａｏＹｉｎｇｊｕｎ（ＡｆｆｉｌｉａｔｅｄＨｏｓｐｉ... 详细信息

ＡＮＴＥＮＡＴＡＬＳＯＮＯＧＲＡＰＨＩＣＤＥＴＥＣＴＩＯＮＯＦＷＯＬＦＦＩＡＮＤＵＣＴＣＹＳＴＳｏｎｇＳｈｕｌｉａｎｇ，ＤｉｎｇＪｉｌｉａｎ，Ｃｈｅｎｙｕｒｏｎｇ，ＧａｏＹｉｎｇｊｕｎ（ＡｆｆｉｌｉａｔｅｄＨｏｓｐｉｔａｌ，ＴａｉｓｈａｎＭｅｄｉｃａ...

关键词： wolffian duct cyst fetus ultrasound

基于最大熵原理的光伏接入配网系统电压风险评估

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电测与仪表 2024年第11期61卷 76-83页

作者：陈书樑曾江马海杰华南理工大学电力学院广州510640 广东省电网智能量测与先进计量企业重点实验室广州510663

在国家能源战略的推动下,未来光伏等新能源接入配网的情况将日益增加,准确评估其接入配网后的越限风险具有重要意义。为了合理评估光伏并网后产生的影响,文中在考虑光伏发电的随机性及负荷波动性的前提下,提出基于最大熵原理求解含光伏... 详细信息

在国家能源战略的推动下,未来光伏等新能源接入配网的情况将日益增加,准确评估其接入配网后的越限风险具有重要意义。为了合理评估光伏并网后产生的影响,文中在考虑光伏发电的随机性及负荷波动性的前提下,提出基于最大熵原理求解含光伏配网系统的概率潮流,并结合效用偏好指数型函数表征越限严重度,构建起电压越限风险综合评估模型。以IEEE 33节点系统为例,对比蒙特卡洛模拟法求解概率潮流,最大熵原理在拟合电压概率密度具有准确性及高效性。同时通过仿真结果表明合理选择接入点及接入容量能有效降低整个配网的越限风险,提高了配网的安全稳定运行能力,为今后新能源并网风险评估提供参考。

关键词：概率潮流最大熵原理分布式光伏电压风险评估