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| 1 | PandaX: a liquid xenon dark matter experiment at CJPL显示文摘PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented. | CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，8： | 9 |
| 2 | Review of cylinder block/valve plate interface in axial piston pumps: Theoretical models,experimental investigations, and optimal design显示文摘Axial piston pumps have been widely used in aircraft hydraulic systems to supply the system with pressurized fluid. The continuous improvement of the aircraft performance has put forward the demand on aviation piston pumps for high power density, safety, and reliability. The lubricating interfaces in axial piston machines are the key design issue that greatly determines the pump performance and service life. The cylinder block/valve plate interface is one of these critical lubricating interfaces and has received considerable attention from many researchers in the last half century. This study aims to review the state-of-the-art literature on the cylinder block/valve plate interface comprehensively and systematically. First, we introduce various theoretical models developed to investigate the lubrication behaviors of the interface and compare them in terms of their assumptions and limitations. Second, the experimental studies on the cylinder block/valve plate interface are presented comprehensively, where the involved test rigs are divided into three types according to their fidelity levels and measurement functionality. Third, we summarize some typical approaches of structure optimization, surface shaping, and surface strengthening, which help improve the load-carrying and anti-wear capacities of the interface under severe operating conditions. Finally, the challenges and future trends of the cylinder block/valve plate interface research are discussed briefly. | Jiang'ao ZHAO Yongling FU Jiming MA Jian FU Qun CHAO Yan WANG | 2021 | Chinese Journal of Aeronautics2021，34，1： | 7 |
| 3 | Dynamical Mechanisms of Effects of Landslides on Long Distance Oil and Gas Pipelines显示文摘According to the investigations on the oil and gas pipelines such as the Lan-Cheng-Chong pipeline and the Southwest pipeline, there are two ways of laying pipeline: pipelines paralleling (approximately) to the main slide direction and pipelines perpendicular (approximately) to the main slide direction. If earth-retaining walls have been built for pipelines paralleling to the main slide direction, they will prevent the lands from sliding; On the contrary, without earth-retaining walls, the sharp broken rocks in the backfilling soil will scratch the safeguard of the pipeline when the landslides take place. Pipelines perpendicular to the main slide direction can be classified into four types according to the relative positions between pipelines and landslides: Pipelines over the slide planes, pipelines inside the fracture strips of slide planes, pipelines below the slide planes and pipelines behind the backsides of landslides. The different dynamical mechanisms of the process in which landslide acts against pipelines are analyzed based on whether the pipelines are equipped with fixed frusta, because the sliding resistance depends on whether and how many fixed frusta are equipped and the distance between frusta. | MA Qingwen WANG Chenghua KONG Jiming | 2006 | Wuhan University Journal of Natural Sciences2006，11，4： | 7 |
| 4 | Reconstruction of a hybrid nucleoside antibiotic gene cluster based on scarless modification of large DNA fragments显示文摘Genetic modification of large DNA fragments(gene clusters) is of great importance in synthetic biology and combinatorial biosynthesis as it facilitates rational design and modification of natural products to increase their value and productivity.In this study,we developed a method for scarless and precise modification of large gene clusters by using RecET/RED-mediated polymerase chain reaction(PCR) targeting combined with Gibson assembly.In this strategy,the biosynthetic genes for peptidyl moieties(HPHT) in the nikkomycin biosynthetic gene cluster were replaced with those for carbamoylpolyoxamic acid(CPOAA)from the polyoxin biosynthetic gene cluster to generate a^40 kb hybrid gene cluster in Escherichia coli with a reusable targeting cassette.The reconstructed cluster was introduced into Streptomyces lividans TK23 for heterologous expression and the expected hybrid antibiotic,polynik A,was obtained and verified.This study provides an efficient strategy for gene cluster reconstruction and modification that could be applied in synthetic biology and combinatory biosynthesis to synthesize novel bioactive metabolites or to improve antibiotic production. | Jiming Zhuo Binbin Ma Jingjing Xu Weihong Hu Jihui Zhang Huarong Tan Yuqing Tian | 2017 | Science China(Life Sciences)2017，60，9： | 6 |
| 5 | Hygroscopicity of particles generated from photooxidation of α-pinene under diferent oxidation conditions in the presence of sulfate seed aerosols显示文摘Smog chamber experiments were conducted to investigate the hygroscopicity of particles generated from photooxidation of α-pinene/NOx with diferent sulfate seed aerosols or oxidation conditions. Hygroscopicity of particles was measured by a tandem diferential mobility analyzer(TDMA) in terms of hygroscopic growth factor(Gf), with a relative humidity of 85%. With sulfate seed aerosols present, Gf of the aerosols decreased very fast before notable secondary organic aerosols(SOA) formation was observed, indicating a heterogeneous process between inorganic seeds and organic products might take place as soon as oxidation begins, rather than only happening after gas-aerosol partition of organic products starts. The final SOA-coated sulfate particles had similar or lower Gf than seed-free SOA. The hygroscopicity of the final particles was not dependent on the thickness but on the hygroscopicity properties of the SOA, which were influenced by the initial sulfate seed particles. In the two designed aging processes, Gf of the particles increased more significantly with introduction of OH radical than with ozone. However, the hygroscopicity of SOA was very low even after a long time of aging, implying that either SOA aging in the chamber was very slow or the Gf of SOA did not change significantly in aging. Using an aerosol composition speciation monitor(ACSM) and matrix factorization(PMF) method, two factors for the components of SOA were identified, but the correlation between SOA hygroscopicity and the proportion of the more highly oxidized factor could be either positive or negative depending on the speciation of seed aerosols present. | Biwu Chu Kun Wang Hideto Takekawa Junhua Li Wei Zhou Jingkun Jiang Qinxing Ma Hong He Jiming Hao | 2014 | Journal of Environmental Sciences2014，26，1： | 6 |
| 6 | Secondary aerosol formation and oxidation capacity in photooxidation in the presence of Al_2O_3 seed particles and SO_2显示文摘To investigate the sensitivity of secondary aerosol formation and oxidation capacity to NOx in homogeneous and heterogeneous reactions, a series of irradiated toluene/NOx/air and ?-pinene/NOx/air experiments were conducted in smog chambers in the absence or presence of Al2O3 seed particles. Various concentrations of NOx and volatile organic compounds(VOCs) were designed to simulate secondary aerosol formation under different scenarios for NOx. Under 'VOC-limited' conditions, the increasing NOx concentration suppressed secondary aerosol formation, while the increasing toluene concentration not only contributed to the increase in secondary aerosol formation, but also led to the elevated oxidation degree for the organic aerosol. Sulfate formation was suppressed with the increasing NOx due to a decreased oxidation capacity of the photooxidation system. Secondary organic aerosol(SOA) formation also decreased with the presence of high concentration of NOx, because organo-peroxy radicals(RO2) react with NOx instead of with peroxy radicals(RO2 or HO2), resulting in the formation of volatile organic products. The increasing concentration of NOx enhanced the formation of sulfate, nitrate and SOA under 'NOx-limited' conditions, in which the heterogeneous reactions played an important role. In the presence of Al2O3 seed particles, a synergetic promoting effect of mineral dust and NOx on secondary aerosol formation in heterogeneous reactions was observed in the photooxidation. This synergetic effect strengthened the positive relationship between NOx and secondary aerosol formation under 'NOx-limited' conditions but weakened or even overturned the negative relationship between NOx and secondary aerosol formation under 'VOC-limited' conditions. Sensitivity of secondary aerosol formation to NOx seemed different in homogeneous and heterogeneous reactions, and should be both taken into account in the sensitivity study. The sensitivity of secondary aerosol formation to NOx was further investigated under 'winter-like' and NH3-rich conditions. No obvious difference for the sensitivity of secondary aerosol formation except nitrate to NOx was observed. | Biwu Chu Tengyu Liu Xiao Zhang Yongchun Liu Qingxin Ma Jinzhu Ma Hong He Xinming Wang Junhua Li Jiming Hao | 2015 | Science China Chemistry2015，58，9： | 3 |
| 7 | Performance optimization of grooved slippers for aero hydraulic pumps显示文摘A computational fluid dynamics(CFD) simulation method based on 3-D Navier–Stokes equation and Arbitrary Lagrangian–Eulerian(ALE) method is presented to analyze the grooved slipper performance of piston pump.The moving domain of grooved slipper is transformed into a fixed reference domain by the ALE method,which makes it convenient to take the effects of rotate speed,body force,temperature,and oil viscosity into account.A geometric model to express the complex structure,which covers the orifice of piston and slipper,vented groove and the oil film,is constructed.Corresponding to different oil film thicknesses calculated in light of hydrostatic equilibrium theory and boundary conditions,a set of simulations is conducted in COMSOL to analyze the pump characteristics and effects of geometry(groove width and radius,orifice size) on these characteristics.Furthermore,the mechanics and hydraulics analyses are employed to validate the CFD model,and there is an excellent agreement between simulation and analytical results.The simulation results show that the sealing land radius,orifice size and groove width all dramatically affect the slipper behavior,and an optimum tradeoff among these factors is conducive to optimizing the pump design. | Chen Juan Ma Jiming Li Jia Fu Yongling | 2016 | Chinese Journal of Aeronautics2016，29，3： | 3 |
| 8 | Impact of gasoline engine deposits on light duty vehicle emissions: in-use case study in Beijing, China显示文摘从轻型的汽油车辆的 Tailpipe 排出物通常随着时间的过去败坏。由于不适当的汽油,去垢性被考虑是如此的排放恶化的主要原因之一的引擎存款的累积。六在里面使用在北京的轻型的汽油车辆被测试在烃(HC ) 的排出物上调查引擎存款的影响,碳一氧化物(公司) 和氮氧化物(没有 x ) 。在引擎存款被移开前后,在从六轻责任车辆的冷开始和热跑测试条件下面的排出物被测量。结果证明尽管单个车辆为每污染物质不同地反应了,引擎存款的消除平均在 29.4% 在热跑的条件下面减少了 HC 排出物,在在 23.0% 的冷开始条件下面的公司排出物和在在 35.5% 的热跑的条件下面的公司排出物(t < 0.05 在所有情况中) 。没有污染物质排出物与统计意义增加了(t < 0.05 ) 在引擎存款的移动以后。在引擎存款的移动之上的排放变化的变化被观察。如此的变化与以前的研究一致,暗示车辆排出物上的引擎存款的影响模式可以服从于充分没被理解的许多影响因素并且对在所有条件下面的控制困难。车辆排出物上的引擎存款的影响的一个统计看法可能为越过一个城市或一个乡村的排出物减小的评估是适当的。在实践维持足够、有效的汽油燃料去垢性使引擎干净并且接着减少车辆排出物是必要的。 | Xin YUE Ye WU Xianjiang HUANG Yao MA Yuan PANG Xiaofeng BAO Jiming HAO | 2012 | Frontiers of Environmental Science & Engineering2012，6，5： | 3 |
| 9 | Effect of aluminium dust on secondary organic aerosol formation in m-xylene/NO_x photo-oxidation显示文摘As an important anthropogenic volatile organic compound(VOC), m-xylene has attracted numerous attentions due to its potential in secondary organic aerosol(SOA) formation. In this study, effects of aluminium dust seeds(boehmite and alumina) on SOA yield and aerosol size in m-xylene/NOx photo-oxidation were investigated in a 2 m3 smog chamber at 30°C and 50% relative humidity. Compared to the seed-free system, the presence of aluminium seeds resulted in an increase in the SOA yield, and also enhanced the O3 concentration in the chamber. The photolysis of O3 is a major source of OH radical, which is the most important oxidant of m-xylene. The increase in O3 concentration could result in the generation of more OH radicals, and finally contribute to the SOA formation. Seed particles influence the SOA size mainly by acting as condensation nuclei. Semi-volatile organic compounds(SVOCs) were condensed onto these nuclei, resulting in the increase in SOA size. However, when aluminium seeds with high concentrations were introduced into the system, SVOCs that had been condensed onto each particle were dispersed by these seeds, leading to the reduction in aerosol size. | LIU Chang MA QingXin CHU BiWu LIU YongChun HE Hong ZHANG XiaoYe LI JunHua HAO JiMing | 2015 | Science China Earth Sciences2015，58，2： | 2 |
| 10 | Criterions and Measures of Route Selection of Shallowly Embedded Long-Distance Oil and Gas Pipeline in Mountain Areas显示文摘According to the engineering investigation of long-distance oil and gas pipelines, the criterions and measures of route selection are drawn as follows: the flat landform is the first choice in route alignment. The foot of mountain is the first choice when the route passes by the valley. The route should pass by but the shady and deposited slope and not in sunny and erosive slope as possible as it can. The pipeline should be vertical to contour climbing and descending the mountain except steep slope. Tunnel can be used in crossing foothill. Perpendicularly traversing the river is better than beveling; the worst choice is to put the pipeline along the river. Bypass is the best choice in karsts area . The order of route selection should be pre-choosing, investigation, optimization and adjustment. | WANG Chenghua MA Qingwen KONG Jiming CHEN Zefu LI Xiuzhen | 2006 | Wuhan University Journal of Natural Sciences2006，11，4： | 1 |
| 11 | Hydrothermal preparation of uniform nanosize rutile and anatase particles显示文摘 | CHENG Humin MA Jiming ZHAO Zhenguo | 1995 | J Chem Mater1995，7，： | 1 |
| 12 | Hydrothermal Synthesis of Acicular Lead Titanate Fine Powders显示文摘 | Humin Cheng Jiming Ma Zhenguo Zhao Di Qiang | 1992 | Journal of the American Ceramic Society1992，75，5： | 1 |
| 13 | A study on the stability and roheologieal behavior of concentrated TiO2 dipersions 显示文摘 | Xiaobin Chen Humin Cheng Jiming Ma | 1998 | Powder Technology1998，99，： | 1 |
| 14 | Preparation of BaSO4 nanoparticles in non-ionic w/o microemulsions 显示文摘 | QI Limin MA Jiming CHENG Humin | 1996 | Colloids and Surfaces A : Physicochem Eng Aspects1996，108，： | 1 |
| 15 | A study on the stability and rheological behavior of concentrated TiO2 dispersions 显示文摘 | Xiaobin Chen Humin Cheng Jiming Ma | 1998 | Powder Technology1998，99，： | 1 |
| 16 | Case study: River training and its effects on fluvial processes in the lower Yellow River, China显示文摘 | WU Baosheng WANG Guangqian MA Jiming | 2005 | J Hydr Eng2005，131，2： | 1 |
| 17 | Design and development of the deep-rock in-situ condition-preserved coring calibration platform显示文摘To systematically validate and calibrate the theory and technology of the deep in-situ conditionpreserved coring, the in-situ conditions at different depths should be simulated, and the full-size coring tests should be carried out in this simulated environment. Therefore, a deep-rock in-situ conditionpreserved coring calibration platform was designed and developed. The self-tightening sealing structure and the quick-disassembly structure were designed on the basis of an innovative segmented nonuniformdiameter structure, which was a breakthrough from the traditional high-pressure vessel frame and was verified by finite element simulation and actual testing under extreme working conditions, respectively.To simulate the actual deep in-situ environment with a temperature of 150℃ and pressure of 140 MPa for a large Φ450 mm×H1400 mm core, temperature and pressure control systems were designed by coupling, and a pre-embedded high-pressure-resistant temperature sensor was designed. Finally, highprecision assembly automation, complex movement coordination of the coring device with the platform,and rotary dynamic sealing were achieved by utilizing the combination of adaptive cabin body servo control and an adaptive mechanical structure in a limited space, laying a solid foundation for the calibration of in-situ condition-preserved coring. | Yihang Li Heping Xie Ru Zhang Zetian Zhang Zhilong Zhang Heng Gao Wei Huang Jixun Zhang Jiming Gao Xin Ma Ruibing Xu | 2023 | International Journal of Mining Science and Technology2023，33，11： | 1 |
| 18 | Conducting properties of mixed reverse micelles显示文摘 | Liu Daojun Ma Jiming Cheng Humin | 1999 | Colloids and Surfaces A:Physicochemical and Engineering Aspects1999，148，： | 1 |
| 19 | Investigation on the conductivity and microstructure of AOT/non-ionic surfactants/water/n-heptane mixed reverse micelles显示文摘 | Liu Daojun Ma Jiming Cheng Humin | 1998 | Colloids and Surfaces A:Physicochemical and Engineering Aspects1998，135，： | 1 |
| 20 | The photoelectrochemistry of transition metal-ion-doped TiO2 nanocrystalline electrodes and higher solar cell conversion efficiency based on Zn2+-doped TiO2 electrode显示文摘 | Yanqin Wang Yanzhong Hao Humin Cheng Jiming Ma Bin Xu Weihua Li Shengmin Cai | 1999 | Journal of Materials Science1999，，12： | 1 |
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