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Shock initiation performance of NTO-based polymer bonded explosive

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Defence Technology（防务技术） 2022年第9期18卷 1538-1545页

作者： Peng-song Nie Shao-hua Jin Li-xiao-song du Li-jie Li Kun Chen Yu Chen Rui Yu School of Materials Science and Engineering Beijing Institute of TechnologyZhongguancun South Street 5Beijing100081China Xi'an Modern Control Technology Research Institute Xi'an710065China

3-nitro-1,2,4-tri-azol-5-one(NTO) is a high energy insensitive explosive. To study the shock initiation process of NTO-based polymer bonded explosive JEOL-1(32%octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX), 32% NTO, 28% Al and 8% binder system), the cylinder test, the gap experiments and numerical simulation were carried out. Firstly, we got the detonation velocity(7746 m/s) and the parameters of Jones-Wilkins-Lee(JWL) equation of state(EOS) for detonation product by cylinder test and numerical simulation. Secondly, the Hugoniot curve of unreacted explosive for JEOL-1 was obtained calculating the data of pressure and time at different Lagrangian positions. Then the JWL EOS of unreacted explosive was obtained by utilizing the Hugoniot curve as the reference curve. Finally, we got the pressure growth history of JEOL-1 under shock wave stimulation and the parameters of the ignition and growth reaction rate equation were obtained by the pressure-time curves measured by the shockinitiation gap experiment and numerical simulation. The determined trinomial ignition and growth model(IG model) parameters can be applied to subsequently simulation analysis and design of insensitive ammunition with NTO-based polymer bonded explosive.

关键词： NTO Shock initiation Hugoniot data JWL Ignition and growth reactive model

Research on the cutting force of a pick

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Mining Science and Technology 2009年第4期19卷 514-517页

作者： LIU song-yong du Chang-long CUI Xin-xia School of Mechanical and Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Cutting tests were done using a test bed designed to measure pick cutting forces when cutting coal and *** test equipment has a drum with two starting helical *** forces on a pick were measured as a function of coal compressive strength,pick carbide tip diameter and the cutting depth per drum *** results show that the cutting force is linearly related to the compressive *** relationship between the cutting force and both the carbide tip diameter and the cutting depth are *** in the cutting force does not increase with coal compressive strength but it has a linear relationship to tip diameter.A plot of cutting force fluctuations versus the cutting depth follows a sigmoidal *** on the analysis of these test results a theoretical basis is supplied for design and effective use of shearer drums.

关键词： pick cutting force shearer cutting theory carbide tip diameter cutting depth

Self-assembled graphene oxide/polyethyleneimine films as high-performance quartz crystal microbalance humidity sensors

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Rare Metals 2021年第6期40卷 1597-1603页

作者： Zhen Yuan Hui-Ling Tai Yuan-Jie Su Guang-Zhong Xie Xiao-song du Ya-Dong Jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

As humidity is one of the most widely demanded environmental parameters,the precision of its detection is *** advanced humidity sensor will improve the validity of the humidity monitoring *** this study,a facile chemical layer-by-layer self-assembly(CLS)method was developed for fabricating graphene oxide(GO)/polyethyleneimine(PEI)multilayer *** to the chemical bonding between the PEI and GO,and the intrinsic stickiness of the PEI,layered films with different numbers of layers were successfully prepared using the CLS method and confirmed through ultraviolet-visible(UV-Vis)spectroscopy and the mass loading of quartz crystal microbalance(QCM).Morphological measurements revealed that the roughness and thickness of the films increased exponentially with the number of *** GO/PEI films were deposited on QCM electrodes using the CLS method to produce the humidity *** humidity measurement results showed a high sensitivity(37.84 Hz/%RH)and rapid response/recovery(<5 s/8 s)of the optimal sensor,which was superior to that of recently developed QCM sensors.

关键词： Humidity sensors Quartz crystal microbalance Graphene oxide Polyethyleneimine Self-assembly

Component fractionation of wood-tar by column chromatography with the packing material of silica gel

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Chinese Science Bulletin 2011年第14期56卷 1434-1441页

作者： WANG Ze LIN WeiGang song WenLi du Lin LI ZhengJie YAO JianZhong State Key Laboratory of Multi-Phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

Bio-oil can be an important fuel resource for automobiles in the future,while its complex composition restricts the direct application of the bio-oil *** it is necessary to separate the complex mixture to relatively simplified fractions for goal directed specific treatments to reach the fuel quality for automobiles,and meanwhile different functional chemical materials and fine chemicals can be *** it is significant to investigate the bio-oil component separating *** the method of column chromatography by the packing material of silica gel with two series of eluants of cyclohexane-benzene-methanol and cyclohexane-dichloromethane-methanol were investigated for component fractionation of the raw wood tar (oil fraction of the liquid product by slow pyrolysis of wood).The analytical results show that the components in cyclohexane are rich in alkoxyl-monophenols;the components of alkyl-monophenols and five ring oxygen-containing compounds are abundant in benzene and in dichloromethane similarly;in the methanol fraction,the components are diverse and diphenols are relatively in higher content,comparatively small polar molecules and five ring oxygen-containing compounds are more abundant in the methanol fraction after being eluted by dichloromethane,and the content of 1-(4-hydroxy-3-methoxyphenyl)-2-propanone is higher after being eluted by benzene.

关键词：包装材料木焦油硅胶分馏成分柱层析含氧化合物二氯甲烷

Model test of the cutting properties of a shearer drum

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Mining Science and Technology 2009年第1期19卷 74-78页

作者： LIU song-yong du Chang-long CUI Xin-xia CHENG Xue School of Mechanical and Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 22i008 China

According to similarity theory, we carried out a dimensional analysis of the shearer drum correlation parameters and built similarity criteria. Based on these, similarity models of shearer drums were developed. Simultaneously, based on an estab- lished cutting testbed of the coal and rock, cutting tests of different pick arrangements of the drum models were carried out, where the compressive strength of the analogous cutting material was 2.48 MPa and the drum rotary speed 67.5 r/min. The variance, the mean values, maxima and mean maxima of the torque load were analyzed for different type drum models. Moreover, the relation-ships between the type of pick arrangements and the cutting lump coal percentage were studied. The results indicate that the load fluctuation of the sequence drum is larger than that of the punnett square drum in the cutting process and the lump coal percentage and economic benefits of the sequence drum are inferior to the punnett square drum. We conclude that the punnett square drum is superior to the sequence drum.

关键词： similarity theory dimensional analysis similarity criteria cutting test lump coal percentage

Prediction of favorable geological storage areas based on sedimentary characteristics:A case study on the northeastern Ordos Basin,China

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Energy Geoscience

Energy Geoscience 2024年第4期5卷 187-197页

作者： Yue Zhao Qiang Xu song du Yang Zhang Tengzhuo Zhang Yinglin Fan Yan Ding Sitong song Xinxin Feng General Prospecting Institute China National Administration of Coal GeologyBeijing100039China China Coal Weikun(Beijing)Energy Saving and Environmental Protection Technology Co. Ltd.Beijing102488China China University of Mining and Technology(Beijing) Beijing100083China Shaanxi Tiancheng Petroleum Technology Co. Ltd.Xi'an710000China

The Ordos Basin is a large cratonic basin with stable deposition in Northwest *** its mostly stable subsidence background and the urgent need for saline water disposal and carbon dioxide storage in the coal mining and coal chemical industries,the Ordos Basin has been chosen as a pilot demonstration site for carbon dioxide and saline water storage in ***,few studies have been made to evaluate the sedimentary and sequence stratigraphy characteristics of this region,as well as their influence on carbon dioxide and saline water storage *** address this research gap,we conducted a sedimentary study of the Lower Triassic Liujiagou Formation in the northeastern Ordos Basin utilizing the stratigraphy theory,laboratory test analysis,and pilot project demonstration,to evaluate the area's viability for the deep geological storage of gas and liquid *** studied the tectonic setting,petrological features,and sedimentary characteristics of the favorable strata and predicted favorable areas based on sequence stratigraphy *** lithology predominantly consists of feldspathic graywacke,with a fine grain size and mostly fine-to-medium-grained *** distribution of thick-grained sandstone and fine-grained sediment was identified by dividing the sequence,and a favorable reservoir-cap assemblage configuration was ***'s concluded that the Lower Triassic Liujiagou Formation exhibits suitable characteristics for the deep geological storage of carbon dioxide and saline *** study demonstrates the importance of basic theory in guiding practical applications and provides a reference for the scientific selection of favorable areas for deep basin storage.

关键词： Ordos Basin Liujiagou Formation Sedimentary facies Sequence stratigraphy Geological storage

Bromodomain and extra-terminal inhibitors emerge as potential therapeutic avenues for gastrointestinal cancers

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 75-89页

作者： Hui-Yan Sun song-Tao du Ya-Yun Li Guang-Tong Deng Fu-Rong Zeng Department of Dermatology Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Department of Oncology Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Hunan Engineering Research Center of Skin Health and Disease Hunan Key Laboratory of Skin Cancer and PsoriasisXiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Department of Colorectal Surgical Oncology Harbin Medical University Cancer HospitalHarbin 150081Heilongjiang ProvinceChina

Gastrointestinal(GI)cancers,including colorectal cancer,pancreatic cancer,liver cancer and gastric cancer,are severe social burdens due to high incidence and mortality *** and extra-terminal(BET)proteins are epigenetic readers consisting of four conserved members(BRD2,BRD3,BRD4 and BRDT).BET family perform pivotal roles in tumorigenesis through transcriptional regulation,thereby emerging as potential therapeutic *** inhibitors,disrupting the interaction between BET proteins and acetylated lysines,have been reported to suppress tumor initiation and progression in most of GI *** this review,we will demonstrate how BET proteins participate in the GI cancers progression and highlight the therapeutic potential of targeting BET proteins for GI cancers treatment.

关键词： Gastrointestinal cancer Bromodomain and extra-terminal proteins Bromodomain and extra-terminal inhibitors Acetylated lysines

Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China

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Advances in Climate Change Research 2022年第4期13卷 540-553页

作者： Yu ZHOU Guo-Yu LI Hui-Jun JIN Sergey SMARCHENKO Wei MA Qing-song du Jin-Ming LI dun CHEN State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Da Xing'anling Observation and Research Station of Frozen-ground Engineering and Environment Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesJagdaqi 165000China School of Civil Engineering and Institute of Cold Regions Science and Engineering Northeast Forestry UniversityHarbin 150040China Geophysical Institute University of Alaska FairbanksFairbanksAK 99775USA

Since the Little Ice Age and as a consequence of climate warming,many recently deglaciated forefields have become and will continue to evolve into large ice-debris complexes exposed to periglacial processes and *** transitional processes have significant implications for geomorphologic shaping and water supply for the downstream communities,especially in arid regions,but our understanding of their evolutionary processes and their potential geomorphic and hydrological impacts is stil limited.A landform transition from partly debris-covered glaciers to ice-rich permafrost debris undergoing slow viscous creep was revealed in the Aerzailaikunai Valley in the eastern Tianshan Mountains in China based on the results of in-situ observations and measurements(boreholes,ground temperature monitoring,electrical resistivity tomography surveys,and continuous global positioning system measurements,among others).The internal structure of ice-tll mixture contains pure ice layers,supersaturated frozen sands with ice lenses,and ice-bearing blocks with maximum volumetric contents of heterogeneous ice at 35%-60%.Beneath an 1.5-m-thick active layer,permafrost reached far into the underlying bedrock with the mean annual ground temperature of-2.1℃ at the depth of 20 *** higher surface velocities(with an accumulative displacement of 65 mm from October 2019 to May 2020)and extremely high electrical resistivity(several million Ω m)of the debris-covered glacier margin were in sharp contrast to those of the progressively stabilizing ground surface(up to 16 mm)and the lower zones with relatively smaler electrical resistivity(several thousand Ω m).Combined with the borehole stratigraphy(higher rock content),monitored ground temperatures(permafrost environment),lower electrical resistance(ice-rich moraine),and continuous global positioning system results(viscous creeping),this study documents a transition from glacial to periglacial conditions,materials and processes characteristic

关键词： Alpine permafrost Viscous creep Debris-covered glacier margins Climate warming Landform transition Evolution of rock glacier

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包辛格效应对板材拉弯回弹的影响

北京航空航天大学学报 2007年第2期33卷 206-209,247页

作者：杜颂北京航空航天大学机械工程及自动化学院北京100083

为从理论上研究包辛格效应对板材拉弯回弹的影响,利用随动强化本构方程,采用数值方法,确定拉弯的应力分布,由此计算回弹,并与按等向强化本构方程计算的结果加以比较,根据应力分布的特点,分析包氏效应对拉弯回弹的作用.研究结果表明,对... 详细信息

为从理论上研究包辛格效应对板材拉弯回弹的影响,利用随动强化本构方程,采用数值方法,确定拉弯的应力分布,由此计算回弹,并与按等向强化本构方程计算的结果加以比较,根据应力分布的特点,分析包氏效应对拉弯回弹的作用.研究结果表明,对于先拉后弯,包氏效应有利于降低回弹,但由于预拉伸量较小,或反向加载区域较小,其影响不大;对于先弯后拉,包氏效应不利于减小回弹,但由于应变中性层曲率半径与内弯矩的变化相互制约,其影响也不大.

关键词：包辛格效应回弹随动强化板材弯曲