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Optimized Architecture Design of Shared MDS Storage Systems with Hotspot Buffer
Peng Hai-Yun,Niu Ling 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.9
The ability of storage and energy consumption are the core problem faced by the data centers. The shared MDS storage system takes obvious advantage of large-scale , especially PB-level scale storage systems in solving the problem of efficiency and energy consumption.So designed the optimized architecture with hot-spot buffer, and put forward a new method of performance evaluation for the system. We also analyzed the energy consumption in parallelized data requests in the system. We find out that this architecture improved the throughout in the request of chunk data, and reduced the energy consumption. The serving efficiency and performance of the system are also improved significantly.
Peng Song,Yang Hai,Xin Wang,Longhe Zhao,Baoqiang Chen,Peng Cui,Qin-Jian Xie,Lan Yu,Yang Li,Zhengrong Wu,Hong Yu Li 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.4
Realgar (As4S4), as an arsenic sulfide mineraldrug, has a good therapeutic reputation for anticancer inTraditional Chinese Medicine, and has recently beenreported to inhibit angiogenesis in tumor growth. However,considering the poor solubility and low bioavailability ofrealgar, large dose of realgar and long period of treatmentare necessary for achieving the effective blood medicineconcentration. In present study, we resolved the crucialproblem of poor solubility of realgar by using intrinsicbiotransformation in microorganism, and investigatedunderlying mechanisms of realgar transforming solution(RTS) for antiangiogenesis. Our results demonstrated thatRTS had a strong activity to inhibit HUVECs proliferation,migration, invasion, and tube formation. Moreover, RTSinhibited VEGF/bFGF-induced phosphorylation ofVEGFR2 and the downstream protein kinases includingERK, FAK, and Src. In vivo zebrafish and chickenchorioallantoic membrane model experiments showed thatRTS remarkably blocked angiogenesis. Finally, comparedwith the control, administration of 2.50 mg/kg RTSreached more than 50% inhibition against H22 tumorallografts in KM mice, but caused few toxic effects in thehost. The antiangiogenic effect was indicated by CD31immunohistochemical staining and alginate-encapsulatedtumor cell assay. In summary, our findings suggest thatRTS inhibits angiogenesis and may be a potential drugcandidate in anticancer therapy.
Hai-Peng Xu,Wan-Zhong Lang,Xuan Zhang,Ya-Jun Guo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The charged poly(vinylidene fluoride) (PVDF) membranes were prepared by composite thermallyinduced phase separation (C-TIPS) method with perfluorosulfonic acid (PFSA) as additive. The resultsverify that the porosity, surface hydrophilicity and pure water permeation flux (JW) increase with theaddition of PFSA for the membranes. The highest JW of 507.2 1.2 L/(M2 H bar) is obtained for themembrane cast at 90 8C. Much higher casting temperature isn’t advantageous to improve JW value for thePVDF membranes. All membranes exhibit negative apparent zeta potential (zapp). The crystallinity in b phaseincreases as casting temperature increases for all PVDF membranes.
Network Design and Implementation of Synchronization Software
Peng Hai-yun,Liu Xin 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.4
The actual demand for network applications, the paper discusses the data backup, real-time data synchronization knowledge; On this basis, considering the multi-user concurrency, the case of multi-user collaboration, to achieve a multi-machine real-time synchronization, proposed a network synchronization system model, describes its design ideas and development methods. The results show that: the system update for the relatively low intensity operations with relatively good efficiency of backup and synchronization synergy.
Hydraulic fracturing experiments of highly deviated well with oriented perforation technique
Zhu, Hai Y.,Deng, Jin G.,Liu, Shu J.,Wen, Min,Peng, Cheng Y.,Li, Ji R.,Chen, Zi J.,Hu, Lian B.,Lin, Hai,Guang, Dong Techno-Press 2014 Geomechanics & engineering Vol.6 No.2
In order to investigate the effect of different perforation angles (the angle between the perforation direction and the maximum horizontal principal stress) on the fracture initiation and propagation during hydraulic fracturing of highly deviated well in oil & gas saturated formation, laboratory experiments of the hydraulic fracturing had been carried out on the basis of non-dimensional similar criteria by using 400^3 $mm^3$ cement cubes. A plane fracture can be produced when the perforations are placed in the direction of the maximum horizontal principal stress. When the perforation angle is $45^{\circ}$, the fractures firstly initiate from the perforations at the upper side of the wellbore, and then turn to the maximum horizontal principal stress direction. When the well deviation angle and perforation angle are both between $45^{\circ}$ and $90^{\circ}$, the fractures hardly initiate from the perforations at the lower side of the wellbore. Well azimuth (the angle between the wellbore axis and the maximum horizontal principal stress) has a little influence on the fracture geometries; however it mainly increases the fracture roughness, fracture continuity and the number of secondary fractures, and also increases the fracture initiation and propagation pressure. Oriented perforating technology should be applied in highly deviated well to obtain a single plane fracture. If the well deviation angle is smaller, the fractures may link up.
Study of One Kind of Extended Proportional Guidance Law
Yao Jun,Feng Hai-tao,Sun Peng 보안공학연구지원센터 2014 International Journal of Hybrid Information Techno Vol.7 No.6
One kind of extended proportional guidance law is presented. This guidance law can be used without restriction about the motion speed of missile and target, and this is a different point with the classical proportional guidance law. In the case of random alter the tracking target curvature radius, compared with classical proportional guidance law under the proper random quantity, the normal overload of trajectory is relatively small, and has certain advantage, so the study has significant reference value in actual application. And interception time and normal overload have good performance. Tracking performance for high maneuverability target is better than the classical proportional guidance law. A target intercepting simulation based on MATLAB of the proportional coefficients and line-of-sight angular velocities is generated to analyze the trajectory properties. The effect of guidance coefficients on trajectory properties is studied. Through simulation, we simplify the problem by ignoring the actual factors so that a certain level of error is expected. The situation in practical requires more in-depth analysis and research.
Corrosion behavior and creepage discharze character for machinable AlN/h-BN ceramic composites
Hai-yun Jin,Bo He,Nai-kui Gao,Zong-ren Peng,Ji-qiang Gao 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.5
AlN particles coated with nano-BN were synthesized. The AlN/BN ceramic composites were sintered by Plasma Active Sintering (PAS). Because the nano-BN crystals were homogeneously dispersed around the AlN grains of the matrix, the chemical corrosion resistance of AlN/nano-sized h-BN ceramic composites was higher than that of AlN/micro-sized h-BN ceramic composites and monolithic AlN ceramics. Due to the better hydrophobic property of h-BN, the AlN/BN composites had a better hydrophobic property than the monolithic AlN ceramic, at the same time, because of the homogeneous dispersion of the nano-BN, the creepage discharze voltage of AlN/nano-sized BN composites was the highest. AlN particles coated with nano-BN were synthesized. The AlN/BN ceramic composites were sintered by Plasma Active Sintering (PAS). Because the nano-BN crystals were homogeneously dispersed around the AlN grains of the matrix, the chemical corrosion resistance of AlN/nano-sized h-BN ceramic composites was higher than that of AlN/micro-sized h-BN ceramic composites and monolithic AlN ceramics. Due to the better hydrophobic property of h-BN, the AlN/BN composites had a better hydrophobic property than the monolithic AlN ceramic, at the same time, because of the homogeneous dispersion of the nano-BN, the creepage discharze voltage of AlN/nano-sized BN composites was the highest.
Adaptive Gaussian Mechanism Based on Expected Data Utility under Conditional Filtering Noise
( Hai Liu ),( Zhenqiang Wu ),( Changgen Peng ),( Feng Tian ),( Laifeng Lu ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.7
Differential privacy has broadly applied to statistical analysis, and its mainly objective is to ensure the tradeoff between the utility of noise data and the privacy preserving of individual’s sensitive information. However, an individual could not achieve expected data utility under differential privacy mechanisms, since the adding noise is random. To this end, we proposed an adaptive Gaussian mechanism based on expected data utility under conditional filtering noise. Firstly, this paper made conditional filtering for Gaussian mechanism noise. Secondly, we defined the expected data utility according to the absolute value of relative error. Finally, we presented an adaptive Gaussian mechanism by combining expected data utility with conditional filtering noise. Through comparative analysis, the adaptive Gaussian mechanism satisfies differential privacy and achieves expected data utility for giving any privacy budget. Furthermore, our scheme is easy extend to engineering implementation.