VJM: A Novel Grid Resource Co-Allocation Model for Parallel Jobs

Xiaohui WEI,Zhaohui DING,Shaocheng XING,Yaoguang YUAN 보안공학연구지원센터(IJGDC) 2009 International Journal of Grid and Distributed Comp Vol.2 No.1

Constraints on crust-mantle transition zone with Pn waveforms: A case study of eastern China and southern Korean Peninsula

Ding, Shiban,Ni, Sidao,Kim, YoungHee,He, Xiaohui Elsevier 2019 Physics of the earth and planetary interiors Vol.289 No.-

<P><B>Abstract</B></P> <P>The seismic velocity structure of the crust-mantle transition zone (CMTZ) provides key constraints on crustal dynamics, and can be studied with Pn wave which propagates horizontally along the Moho discontinuity. In this study, we first explore an effect of velocity-gradient structures in the CMTZ through synthetic Pn waveforms, and demonstrate that the shape of Pn changes from step-like to pulse-like when the CMTZ becomes from sharp to a gradient velocity structure, respectively. We then use Pn waveforms of the regional earthquakes (the July 2012 Mw 4.8 earthquake in east China and the September 2016 Mw 5.1 earthquake in South Korea) to examine the CMTZ structures to the west and east of the Yellow Sea and thus to constrain tectonic affinity between the eastern China and southern Korean Peninsula. The Pn waveforms from the Mw 4.8 event in east China show that the Moho in southern Yangtze Craton is sharp whereas there may be a gradient structure in CMTZ with a 6–10 km thickness in northern Yangtze Craton. The Pn waveforms from the Mw 5.1 event in South Korea show that the CMTZ in South Korea is also sharp, similar to the southern Yangtze Craton. Observed difference in CMTZ structures suggest that Sulu Orogenic Belt may extend along the north of the Gyeonggi Massif in Korea.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pn waveforms are sensitive to the gradients of crust-mantle transition zone (CMTZ). </LI> <LI> Southern Korea features sharp Moho while eastern China Moho shows variability. </LI> </UL> </P>

Separation and Characterization of Organic Chlorides in a Chinese Crude Oil

Xiaohui Li,Rui Ma,Liang Ding,Huiying Yuan,Bencheng Wu,Jianhua Zhu 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.4

A crude oil from Shengli oilfield of China was extracted with N,N‐dimethylformamide (DMF) for separation and enrichment of organic chlorides. The resulting extract with relatively higher chlorine concentration was analyzed with gas chromatography–mass spectrometry (GC/MS). Among the identified heteroatom compounds in the extract sample, nitrogen‐containing compounds were most abundant in the extract sample, followed by chlorine‐, sulfur‐, and oxygen‐containing compounds, respectively. Four organochlorines with an aromatic core structure, i.e., 5‐chloro‐2‐methylaniline, 2‐chloro‐6‐methylaniline, 4‐chloro‐2‐nitrotoluene, and 1‐(5‐chloro‐2‐hydroxyphenyl)ethanone, were identified from crude oil extract. The dominant abundant organic chloride is 5‐chloro‐2‐methylaniline with relative content of 65.1% in the total of identified organic chlorides, followed by 1‐(5‐chloro‐2‐hydroxyphenyl)ethanone of 16.3%, 2‐chloro‐6‐methylaniline of 14.5%, and 4‐chloro‐2‐nitrotoluene of 4.1%, respectively.

Two-stage optimization for energy-efficient bipedal walking

Jiatao Ding,Xiaohui Xiao 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.9

This paper proposes a two-stage optimization strategy for energy-efficient gait generation. At the first stage, by tracking the reference zero moment point (ZMP) trajectory, the optimal center of mass (CoM) trajectory, which contributes to the minimal unit energetic cost (UEC) of one step, is solved analytically by using an unconstrained optimization method. At the second stage, to minimize the multi-joint mechanical work, the ZMP reference during the single support phase is optimized by a constrained optimization method. As a result, by considering the feasibility constraints such as the limitation on ZMP movement, the energy-efficient walking patterns can be generated in real-time. Furthermore, the energetic performances under different step parameter configurations, which consist of step length, step duration, and time ratio of double support, are discussed. Simulations and hardware experiments have demonstrated the energetic benefits of the proposed strategy when compared with other state-of-the-art works.

Thermal Analysis of 3J33 Grinding Under Minimum Quantity Lubrication Condition

Zishan Ding,Jian Sun,Weicheng Guo,Xiaohui Jiang,Chongjun Wu,Steven Y. Liang 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.5

With the increasing requirements of environmental protection, energy conservation, and low consumption, minimum quantity lubrication (MQL) technology has attracted people’s attention. In the grinding process, the cooling performance of MQL has always been the focus. In this study, considering the influence of the grinding wheel speed, grinding fluid flow rate, and gas pressure on the useful flow rate, the MQL grinding cooling performance was studied and analyzed, and the MQL grinding heat transfer coefficient model, grinding energy partition model and grinding temperature calculation model were established. Grinding experiments were carried out with maraging steel 3J33 as the experimental object, of which the results verified the accuracy of the model. The error of temperature calculation model is 9.45%. The influence of different parameters on the surface processing quality of the workpiece was studied through experimental results. The results show that the grinding wheel speed and gas pressure have a more significant influence on the useful fl ow rate of the grinding fluid. The grinding fluid flow rate but significant impact on the surface quality of the workpiece.

High mobility group box 3 promotes cervical cancer proliferation by regulating Wnt/β-catenin pathway

Shichao Zhuang,Xiaohui Yu,Ming Lu,Yujiao Li,Ning Ding,Yumei Ding 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.6

Objective: High mobility group box 3 (HMGB3) plays an important role in the developmentof various cancer. This study aims to explore whether HMGB3 regulates cervical cancer (CC)progression and elucidate the underlying mechanism. Methods: HMGB3 expression in clinical patients' tumor samples were determined byreal-time quantitative polymerase chain reaction (qRT-PCR) and western blot. HMGB3overexpression/knockdown were used to investigate its function. Cell apoptosis and cyclewere detected by Annexin V/PI staining and flow cytometry. In vivo tumor model was madeby subcutaneous injection of HeLa cells transfected with shRNAs targeting HMGB3 (sh HMGB31) into the flank area of nude mice. Western blot was used to detect the levels ofβ-catenin, c-Myc, and matrix metalloproteinase-7 (MMP-7) in Hela and CaSki cells transfectedwith sh-HMGB3 or shRNAs targeting β-catenin. Results: Both messenger RNA and protein levels of HMGB3 were upregulated in CC tissuesfrom patients. High expression level of HMGB3 had positive correlation with serosalinvasion, lymph metastasis, and tumor sizes in CC patient. Functional experiments showedthat HMGB3 could promote CC cell proliferation both in vitro and in vivo. The expressionlevels of c-Myc and MMP-7 were increased, resulting in regulating cell apoptosis, cell cycle,and activating Wnt/β-catenin pathway. Conclusions: Our data indicated that HMGB3 may serve as an oncoprotein. It could be used asa potential prognostic marker and represent a promising therapeutic strategy for CC treatment.

Effect of Electrostatic Spraying Conditions on Droplet Deposition in Different Depth Areas on the Back of Target

Zhao Liang,Hao Ding,Guangming Wang,Xiaohui Zhang 한국전기전자재료학회 2020 Transactions on Electrical and Electronic Material Vol.21 No.2

In order to explore the optimal spraying effect of diff erent electrostatic spraying parameters on droplet deposition on the back of target, the application height, angle, charging voltage, and nozzle water pressure had been applied as spraying variables for the test designed to investigate on droplet density, deposition and coverage in diff erent depth areas of the target. The results of the study showed that the height and angle of the spatial parameters of the application had a significant effect on the application effect. The droplet deposition effect decreased by 94.71%, 89.09% and 94.17% at diff erent depths on the back of the target as the height increased from 20 to 50 cm. The deposition effects of droplets at diff erent depths on the back of the target at 60° tilt angle are 5.91%, 9.81% and 51.97% of them at 0° tilt angle respectively. The results of orthogonal experiment showed that the optimal parameters of diff erent depth areas on the back of different targets were inconsistent. The height and angle of application are the main influencing factors, when the target is warped up. The depth range of the target (5–7.5 cm) is greatly affected by the nozzle water pressure. In the actual spraying pesticides application, the appropriate operating parameters can be selected according to the size and attitude of the leaf surface to improve the spraying effect.

Web-based Visualization and Analysis of Atmospheric Nucleation Processes

Jinzhu Gao,Rui Ding,Yi Liu,Bin Chen,Xiaohui Cui,J. Ilja Siepman 보안공학연구지원센터(IJUNESST) 2009 International Journal of u- and e- Service, Scienc Vol.2 No.2

A facile pyrolysis method to prepare vanadium oxides for high performance aqueous Zn-ion battery

Zhu Haitao,Liao Shengyun,Su Boya,Ding Xiaohui,Liu Qiang 한국물리학회 2022 Current Applied Physics Vol.34 No.-

Vanadium oxides, as one of the most promising cathode materials for zinc ion batteries, have attracted extensive attention in recent years. Different from the generally used hydrothermal and solvothermal methods to adjust the composition, structure, morphology and electrical properties of vanadium oxides, we firstly adopt a simple pyrolysis method to synthesize a series of vanadium oxides and use them as cathode materials for aqueous Zn-ion battery, whose electrochemical performances is superior to most state-of-the-art vanadium oxides. The asobtained V4O7 under the calcination temperature of 700 ◦C exhibits excellent zinc ion storage performance with maximum specific capacity of 367.2 mAh g 1 at the current density of 1 A g 1, about 84.9% capacity retention after 100 cycles, excellent rate performance, high capacity. In addition, a series of structural and electrochemical characterization are used to reveal the possible mechanism of charge and discharge.

First principles studies on the elastic, thermodynamic properties and electronic structure of Ti15−xMoxSn compounds

Chunmei Chen,Wei He,Lijing Ding,Xiaohui Song,Jinhui Huang,Tao Wang,Guoren Huang 한국물리학회 2018 Current Applied Physics Vol.18 No.3

The structural, elastic, thermodynamic and electronic properties of the Ti15−xMoxSn compounds were systematically investigated by means of first-principles calculations based on the density functional theory (DFT). The calculated results demonstrate the Ti15−xMoxSn compounds still remain the stable β phase structure. The calculation of cohesive energy shows that the structural stability of the Ti15−xMoxSn compounds increases apparently with the increase of Mo content. According to Hooke's law, the single crystal elastic constants were obtained and show that all the calculated compounds keep mechanical stability. Then the bulk modulus B, shear modulus G, Young's modulus E and Poisson's ratio ν of polycrystalline aggregates were calculated at zero pressure. The calculated results show that among these Ti15−xMoxSn compounds, Ti4Mo11Sn exhibits the largest stiffness while Ti12Mo3Sn shows the greatest ductility. The compounds Ti12Mo3Sn and Ti11Mo4Sn with the two lowest elastic Young's modulus of 61.01 GPa and 65.59 GPa are expected to be promising metallic biomaterials for implant applications. Besides, the Debye temperature ΘD and the electronic density of states (DOS) are also investigated and discussed.