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| 1 | Experimental study on fusion and break-up motion after droplet collision显示文摘The interactions between droplets have an important influence on the atomization of liquid fuel,the combustion efficiency,and the reduction of particulate matter emissions for an engine.For this reason,this paper presents results from an experimental study on the coalescence and break-up of droplets after collision.According to the shape and parameters of the droplets at different times after the collision of the droplets was captured by a high speed camera,analysis was done for the following effects of droplet collisions:the collision-coalescence motion for the collision between the droplets,the change history of the dimensionless length-to-width ratio of the oscillation motion,the critical size ratio of the breakup motion,and the liquid physical properties of the particles.The results show that the droplets collide and exhibit two forms of coalescence oscillation and break-up:for oscillating motion,at higher droplet collision velocities and dimensionless size ratios,there will be a larger dimensionless length-to-width ratio for the droplet oscillation;for the break-up motion,at higher collision velocities,there will be lower dimensionless size ratios,and lower liquid surface tension,shorter times over which the droplet breaks,and facilitated droplet break-up.The research results presented here can be used for atomization in engine cylinder,increasing the gas/liquid contact area and enhancing the combustion efficiency of gas/liquid heat transfer to improve the combustion efficiency of the engine. | Yi Li Zhi Ning Ming Lü | 2020 | Chinese Journal of Chemical Engineering2020，28，3： | 1 |
| 2 | Special Section to Commemorate the 30th Anniversary of Advances in Atmospheric Sciences显示文摘The first issue of Advances in Atmospheric Sciences(AAS)was published in 1984.Originally quarterly,the journal later became bimonthly and will now be published monthly starting from 2015.AAS is sponsored by the Chinese Committee of Meteorology and Atmospheric Physics(CCMAP)—which later evolved into Chinese National Committee for International Association of Meteorology and Atmospheric Sciences(IAMAS)—and the Institute of Atmospheric Physics(IAP)and it is now jointly published by Springer and Science Press.The main purpose of the journal is to publish original research papers | Lü Daren ZHU Jiang Ming XUE | 2015 | Advances in Atmospheric Sciences2015，32，1： | 0 |
| 3 | An overview on GNSS carrier-phase time transfer research显示文摘Global navigation satellite system(GNSS)carrier phase observations are two orders of higher accuracy than pseudo-range observations,and they are less affected by multipath besides.As a result,the time transfer accuracy can reach 0.1 ns,and the frequency transfer stability can reach 1×10^-15 with carrier phase(CP)method,therefore CP method is considered the most accurate and promising time transfer technology.The focus of this paper is to present a comprehensive summary of CP method,with specific attention directed toward day-boundary clock jump,ambiguity resolution(AR),multi-system time transfer and real-time time transfer.Day-boundary clock jump is essentially caused by pseudo-range noise.Several approaches were proposed to solve the problem,such as continuously processing strategy,sliding batch and bidirectional filtering methods which were compared in this study.Additionally,researches on AR in CP method were introduced.Many scholars attempted to fix the single-difference ambiguities to improve the time transfer result,however,owing to the uncalibrated phase delay(UPD)was not considered,the current studies on AR in CP method were still immature.Moreover,because four GNSS systems could be used for time-transfer currently,which was helpful to increase the accuracy and reliability,the researches on multi-system time transfer were reviewed.What’s more,real-time time transfer attracted more attention nowadays,the preliminary research results were presented. | ZHANG Ming Lü JinHu BAI ZhengDong JIANG ZhiQi CHEN BoBo | 2020 | Science China(Technological Sciences)2020，63，4： | 3 |
| 4 | Numerical simulation of flow focusing pattern and morphological changes in two-phase flow inside nozzle显示文摘The flow focusing nozzle is a new type of nozzle that performs effective atomization of the discrete phase by means of high-speed motion of the continuous phase.The flow pattern and its morphological changes have a significant effect on the atomization, but the influence of different parameters on the morphological change of the flow pattern remains unclear.The flow focusing pattern and morphological changes in the two-phase flow inside the nozzle were simulated numerically, based on the volume of fluid method.The results demonstrate that the ratio of the nozzle-to-capillary distance and capillary diameter, the gas–liquid velocity ratio, and capillary diameter have significant effects on the flow pattern.When the ratio of the nozzle-to-capillary distance H and capillary diameter D increases, or the capillary diameter D increases, the flow pattern tends to transform into a laminar form; however, when the gas–liquid velocity ratio V increases, the flow pattern tends to transform into a turbulence form.Furthermore, we define the cone-shaped expansion rate, cone-shaped focusing rate,and cone angle in order to study the morphological changes in the cone shape inside the nozzle.The results indicate that the morphological change of the cone shape and flow pattern transformation is interrelated.When the cone shape tends to be unstable, the flow pattern changes towards flow blurring, whereas, a stable cone indicates that the flow tends to exhibit a droplet pattern. | Jin Zhao Zhi Ning Ming Lü Geng Wang | 2019 | Chinese Journal of Chemical Engineering2019，27，1： | 2 |
| 5 | Activation of bone morphogenetic protein-6 gene transcription in MCF-7 cells by estrogen显示文摘Background Bone morphogenetic protein-6 (BMP-6) is closely correlated with tumor differentiation and skeletal metastasis. Estrogen is considered as a stimulant for the initiation and promotion of breast cancer. Previous studies demonstrated that 17β-estadiol (E2) can selectively increase the expression of BMP-6. This experiment is designed to detect the molecular mechanism of estrogen activating BMP-6 gene transcription in human estrogen receptor positive (ER+) breast cancer cell line MCF-7. Methods After the treatment of MCF-7 cells with E2 at different concentrations (10-11 mol/L, 10-9 mol/L, 10-7 mol/L), the BMP-6 expression level was examined through real-time polymerase chain reaction. Through restriction enzyme digestion, human BMP-6 1.2 kb long promoter, BMP-6 0.7 kb long promoter was cloned into pGL-3 basic vector; after the treatment with 10-7 mol/L E2, luciferase activities of the two promoters were detected. Site-directed mutagenesis was performed to obtain the mutant forms of estrogen response element half-site (1/2 ERE) element and Sp1 sites in the BMP-6 promoter, the activities of these mutant form promoters were detected following the methods mentioned above. Chromatin immunoprecipitation (ChIP) assay was also used to confirm the binding of estrogen receptor α (Erα) on BMP-6 promoter in the presence of E2. Results E2 dose dependently increased BMP-6 mRNA expression in human ER+ breast cancer cell line MCF-7. At a dose of 10-7 mol/L E2, human BMP-6 1.2 kb promoter activity was increased by 90% compared with the control group treated with ethanol (P<0.05). Both the 1/2 ERE response element mutant form and the Sp1 site mutant form of the BMP-6 promoter abolished the activation of the BMP-6 promoter's response to E2. Through ChIP assay, the binding of Erα on 1/2 ERE response element in BMP-6 promoter was further validated. Conclusion Estrogen induces BMP-6 expression in human ER+ breast cancer cell line MCF-7 through its receptor Erα binding on 1/2 ERE element in the BMP-6 promoter. | ZHANG Ming YAN Ji-dong ZHANG Lei WANG Qing Lü Shu-jun ZHANG Jie ZHU Tian-hui | 2005 | Chinese Medical Journal2005，，19： | 2 |
| 6 | Three-phase Fluid Numerical Simulation and Water Modeling Experiment of Supersonic Oxygen Jet Impingement on Molten Bath in EAF显示文摘By means of the computational fluid dynamics software Fluent 6.3,a mathematical model of three-dimensional three-phase fluid flow field in the molten bath of electric arc furnace(EAF)with side accessorial oxygen lances was developed to study the transient phenomena of oxygen jet impingement on the molten steel and the molten slag.The water modeling experiment was carried out to verify the simulation results.The impingement of the supersonic oxygen jet caused impact dent on the molten steel surface accordingly.The area of impact dent changed almost in linear relationship to flow rate of oxygen jet,which can be expressed by a deduced mathematical equation.And the relationship between the impact force of oxygen jet and the correspondingly formed apparent static pressure on molten bath was obtained,which was in linear relationship and a direct proportion,and can also be expressed by a deduced mathematical equation. | Shao-chun CHEN Rong ZHU Jing-she LI Chun-lai HE Ming Lü | 2014 | Journal of Iron and Steel Research(International)2014，21，6： | 2 |
| 7 | Impacts of membrane properties on reactive dye removal from dye/salt mixtures by asymmetric cellulose acetate and composite polyamide nanofiltration membranes显示文摘 | Sanchuan Yu Meihong Liu Miao Ma Ming Qi Zhenhua Lü Congjie Gao | 2009 | Journal of Membrane Science2009，，1： | 1 |
| 8 | Effect of ZnO on Crystallization of Zircon from Zirconium‐Based Glaze显示文摘 | Shaohua Wang Cheng Peng Ming Lü Jianqing Wu | 2013 | J. Am. Ceram. Soc2013，，7： | 1 |
| 9 | Comparison of remotely sensed and meteorological data-derived drought indices in mid-eastern China显示文摘 | Lei Zhou Jie Zhang Jianjun Wu Lin Zhao Ming Liu Aifeng Lü Zhitao Wu | 2012 | International Journal of Remote Sensing2012，，6： | 1 |
| 10 | Preliminary Physical Design of the Injection Line and Central Region of CYCIAE-70显示文摘A multi-purpose compact cyclotron under design at CIAE, CYCIAE-70, can be applied in radioactive ion-beam production and nuclear medicine, capable of accelerating both H- and D- beam and extracting proton and deuteron beam in dual opposite directions by charge exchange stripping devices. | YANG Jian-jun, ZHANG Tian-jue, JIA Xian-lu, WANG Chuan, LI Ming, YAO Hong-juan, LüYin-long | 2010 | Annual Report of China Institute of Atomic Energy2010，，1： | 0 |
| 11 | Observations of narrow bipolar events during two thunderstorms in Northeast China显示文摘Here we report characteristics of more than 100 cases of Narrow Bipolar Events(NBEs)occurred during two thunderstorms on the basis of our analysis of the dataset collected by a GPS based three-station time of arrival(TOA)lightning location system deployed in Northeast China during the summer of 2010.All of the NBEs were of positive polarity and the amplitude of VLF/LF initial pulse of NBE was comparable to that of return strokes.The waveform characteristics of 166 NBEs that occurred within 150 km were consistent with the results of other reports.The average value of initial peak width of the bipolar pulse is 7.8±1.5 μs,full width at half maximum is 4.6±1.0 μs,and the ratio of initial peak amplitude to overshoot peak is 2.1±0.6.The inferred source height of NBEs occurred in two thunderstorms averaged 9.6 and 7.4 km above mean sea level,whereas the corresponding virtual ionosphere heights at two different times were 89 and 78 km,respectively.In NBEproducing thunderstorms,NBEs tended to burst during the active stage of normal lightning;nevertheless,no determinate quantitative relations could be established between them.In Storm 0711,NBEs were inclined to cluster at the proximity of particular convective cores with high radar reflectivity,and NBEs tended to move consistently at the front area of those NBE-producing convective cores during the evolution of thunderstorm. | Lü FanChao ZHU BaoYou MA Ming WEI LingXiang MA Dong | 2013 | Science China Earth Sciences2013，56，8： | 0 |
| 12 | Preparation and Photocatalytic Application of High Temperature Stabilized ZrSiO_4@TiO_2 Hybrid Nanostructure显示文摘A new ZrSiO4@TiO2 hybrid nanostructure was prepared by a heterogeneous flocculation method. Phytic acid was introduced to modify the surface charging of the components for hybrid assembly. The obtained powder was coated on ceramic tiles and fired at 900 ℃ to fabricate photocatalytic ceramic. Experimental results show that anatase TiO2 in the composite powder has high thermal stability until 1 200 ℃. ZrSiO4 matrix prevents the mass transfer of anatase TiO2 at high temperature and greatly retards the phase transition of anatase to rutile. Besides, the photocatalytic ceramic shows apparent activities for the degradation of methyl orange under ultra-violet irradiation. | 彭诚 FANG Peiyu ZENG Zhichao Lü Ming 吴建青 | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，4： | 0 |
| 13 | Improving the initialization speed for long-range NRTK in network solution mode显示文摘Initialization speed is one of the most important factors in network real time kinematic(NRTK)performance.Owing to the low correlation among the error sources of reference stations,it is difficult to fix reference station ambiguities of long-range NRTK quickly.In traditional reference stations ambiguity resolution(AR)methods,baselines are usually solved independently which is called baseline solution(BS)mode in this study.Because the correlations among baselines are not taken into consideration in ambiguities estimation,the AR speed is slow.Generally,tens of minutes or longer time is required to initialize.We propose a network solution(NS)mode approach,in which the correlations among the double-difference ambiguities(DDAs)as well as double-difference ionospheric delays(DDIDs)of different baselines are considered in estimating float ambiguity solutions.Experimental results show that the float ambiguity solutions obtained are more accurate with an improved consistency.Thus,initialization speed is significantly increased by 18%in NS mode. | ZHANG Ming LÜJinHu BAI ZhengDong LIU Hui FAN ChengCheng | 2020 | Science China(Technological Sciences)2020，63，5： | 0 |
| 14 | The application value of contrast-enhanced ultrasound in the differential diagnosis of pancreatic solid-cystic lesions显示文摘 | Ming Xu Xiao-yan Xie Guang-jian Liu Hui-xiong Xu Zuo-feng Xu Guang-liang Huang Pei-fen Chen Jia Luo Ming-de Lü | 2011 | European Journal of Radiology2011，，7： | 1 |
| 15 | Inhibition of matrine against gastric cancer cell line MNK45 growth and its anti-tumor mechanism显示文摘 | Cong Luo Hai Jun Zhong Li Ming Zhu Xian Guo Wu Jie Er Ying Xiao Hong Wang Wang Xia Lü Qi Xu Yong Liang Zhu Jian Huang | 2012 | Molecular Biology Reports2012，，5： | 1 |
| 16 | A framework on task configuration and execution for distributed geographical simulation显示文摘Geographical simulation is a popular method in geographical and environmental research.Many models developed to address geographic and environmental issues are distributed worldwide.However,due to the lack of portals,these models are still difficult to invoke for geographical simulations in open web environments.This study designs and develops a framework to assemble service-oriented models from volunteers distributed worldwide for geographical simulations on the web.The framework consists of three layers(task layer,data exchange layer,and model execution layer)that establish a network of serviceoriented locally shared models and simulation tasks for user configurations.With the help of such a framework,users can configure simulation tasks and invoke suitable models shared worldwide for geographical simulations.This article provides an application of the distributed simulation of gross primary production(GPP)by the Biome-BioGeochemical Cycles(BGC)model in China.This application shows that the framework can be beneficial for model assembly from volunteers’computers and distributed simulation tasks that are run for geographical and environmental issues,which can be applied to Digital Earth initiatives. | Fengyuan Zhang Min Chen Ming Wang Zihuan Wang Shuo Zhang Songshan Yue Yongning Wen Guonian Lü | 2021 | International Journal of Digital Earth2021，14，9： | 1 |
| 17 | Grey characteristics of microbanding of stalagmite in Shihua Cave, Beijing and its climatic signification(I)显示文摘 | Xiaoguang Qin Dongsheng Liu Ming Tan Tieying Li Jinpo Lü Zhaoyan Gu Houyuan Lü Zhongli Ding Zhengtang Guo Jiaqi Liu Gaozhong Nie | 1998 | Science in China Series D: Earth Sciences1998，，2： | 1 |
| 18 | Grey characteristics of microbanding of stalagmite in Shihua Cave, Beijing and its climatic signification(I)显示文摘 | Xiaoguang Qin Dongsheng Liu Ming Tan Tieying Li Jinpo Lü Zhaoyan Gu Houyuan Lü Zhongli Ding Zhengtang Guo Jiaqi Liu Gaozhong Nie | 1998 | Science in China Series D: Earth Sciences1998，，2： | 1 |
| 19 | Grey characteristics of microbanding of stalagmite in Shihua Cave, Beijing and its climatic signification(I)显示文摘 | Xiaoguang Qin Dongsheng Liu Ming Tan Tieying Li Jinpo Lü Zhaoyan Gu Houyuan Lü Zhongli Ding Zhengtang Guo Jiaqi Liu Gaozhong Nie | 1998 | Science in China Series D: Earth Sciences1998，，2： | 1 |
| 20 | Physical Design of the Injection Line and Central Region of CYCIAE-14显示文摘In order to provide high beam current, the external multi-cusp ion source with axial-injection scheme is adopted for CYCIAE-14. In this scheme the 25 keV H- beam is extracted from the ion source locating at the upside of the main magnet, and injected along the injection line downwards close to the center | YANG Jian-jun, JIA Xian-lu, ZHANG Tian-jue, SONG Guo-fang, ZHONG Jun-qing, JI Bin, LüYin-long, LI Ming, AN Shi-zhong, YAO Hong-juan | 2010 | Annual Report of China Institute of Atomic Energy2010，，1： | 0 |
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