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Low-power task scheduling algorithm for large-scale cloud data centers

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Journal of Systems Engineering and Electronics 2013年第5期24卷 870-878页

作者： Xiaolong Xu Jiaxing wu Geng Yang Ruchuan Wang College of Computer Nanjing University of Posts and Telecommunications State Key Laboratory for Novel Software Technology Nanjing University Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications

How to effectively reduce the energy consumption of large-scale data centers is a key issue in cloud computing. This paper presents a novel low-power task scheduling algorithm （L3SA） for large-scale cloud data centers. The winner tree is introduced to make the data nodes as the leaf nodes of the tree and the final winner on the purpose of reducing energy consumption is selected. The complexity of large-scale cloud data centers is fully consider, and the task comparson coefficient is defined to make task scheduling strategy more reasonable. Experiments and performance analysis show that the proposed algorithm can effectively improve the node utilization, and reduce the overall power consumption of the cloud data center.

关键词： cloud computing data center task scheduling energy consumption.

Operator analogue of the Krein-Milman theorem in the generalized state spaces

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Science China Mathematics 2001年第1期44卷 67-73页

作者：吴畏 1. Department of Mathematics East China Normal University 200062 Shanghai China 2. Chinese Academy of Sciences Institute of Mathematics 100080 Beijing China

We discuss the Krein-Milman-type problems in the C* -convexity theory for the generalized state space of C*-algebraA. The main results are that every BW-compact, C*-convex subset of possesses a C*-extreme point and ... 详细信息

关键词： C*-convexity C*-extreme point generalized state space Krein-Milman-type problems

Shielding performance of metal fiber composites

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中国有色金属学会会刊：英文版 2004年第z1期14卷 493-496页

作者： CHEN Gang wu Bin CHEN Ze-fei Military Engineering Department Artillery Academy Hefei 230031 China Military Engineering Department Artillery Academy Hefei 230031 China College of Mechanical Engineering South China University of Technology Guangzhou 510640 China

Metal fibers have been applied to construct composites with desirable electromagnetic interference shiel ding effectiveness and mechanical properties. Copper and stainless steel fibers were prepared with micro-saw fiberpulling combined cutting method. The cross section of the fibers is hook-like, which is beneficial to the improvement of bonding strength. Cement-based composites with copper and stainless steel fibers were fabricated and their electromagnetic shielding effectiveness was measured in the frequency range of 1 - 5 GHz. The results show that the electromagnetic interference shielding effectiveness of those composites is enhanced by the addition of metal fibers,which functions mainly due to the absorption. At some frequencies, 20 dB or more difference is obtained between the materials with and without metal fibers.

关键词： metal fiber composites shielding performance

Dietary supplementation with branchedchain amino acids enhances milk production by lactating sows and the growth of suckling piglets

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Journal of Animal Science and Biotechnology 2022年第6期13卷 1857-1870页

作者： Reza Rezaei Ana San Gabriel Guoyao wu Department of Animal Science Texas A&M UniversityCollege StationTX 77843USA Ajinomoto Co. Inc1-15-1 KyobashiChuokuTokyo 104-8315Japan

Background:Under current dietary regimens,milk production by lactating sows is insufficient to sustain the maximal growth of their *** precursors of glutamate and glutamine as well as substrates and activators of protein synthesis,branched-chain amino acids(BCAAs)have great potential for enhancing milk production by ***:Thirty multiparous sows were assigned randomly into one of three groups:control(a corn-and soybean meal-based diet),the basal diet+1.535%BCAAs;and the basal diet+3.07%*** ratio(g/g)among the supplemental L-isoleucine,L-leucine and L-valine was 1.00:2.56:*** were made isonitrogenous by the addition of appropriate amounts of *** sows had free access to drinking water and their respective *** number of live-born piglets was standardized to 9 per sow at d 0 of lactation(the day of parturition).On d 3,15 and 29 of lactation,body weights and milk consumption of piglets were measured,and blood samples were obtained from sows and piglets 2 h and 1 h after feeding and nursing,***:Feed intake did not differ among the three groups of *** of asparagine,glutamate,glutamine,citrulline,arginine,proline,BCAAs,and many other amino acids were greater(P<0.05)in the plasma of BCAA-supplemented sows and their piglets than those in the control *** with the control,dietary supplementation with 1.535%and 3.07%BCAAs increased(P<0.05)concentrations of free and protein-bound BCAAs,glutamate plus glutamine,aspartate plus asparagine,and many other amino acids in milk;milk production by 14%and 21%,respectively;daily weight gains of piglets by 19%and 28%,respectively,while reducing preweaning mortality rates by 50%and 70%,***:Dietary supplementation with up to 3.07%BCAAs enhanced milk production by lactating sows,and the growth and survival of their piglets.

关键词： Branched-chain amino acids Lactation Milk synthesis Milk yield Neonatal growth Sow

Gastroduodenal intussusception caused by gastric gastrointestinal stromal tumor:A case report and review of the literature

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World Journal of Clinical Cases 2021年第4期9卷 838-846页

作者： Yi-Lun Hsieh Wen-Hung Hsu Ching-Chun Lee Chun-Chieh wu Deng-Chyang wu Jeng-Yih wu Division of Gastroenterology Department of Internal MedicineKaohsiung Medical University HospitalKaohsiung 807Taiwan Division of Colorectal Surgery Department of SurgeryKaohsiung Medical University HospitalKaohsiung 807Taiwan Department of Pathology Kaohsiung Medical University HospitalKaohsiung 807Taiwan

BACKGROUND Gastric gastrointestinal stromal tumor(GIST)is the most common etiology of gastroduodenal *** gastroduodenal intussusception caused by gastric GIST is mostly treated by surgical resection,the first case of gastroduodenal intussusception caused by gastric GIST was treated by endoscopic submucosal dissection(ESD)in Japan in *** SUMMARY An 84-year-old woman presented with symptoms of postprandial fullness with nausea and occasional vomiting for a ***,she visited a local clinic for help,where abdominal sonography revealed a space-occupying lesion around the liver,so she was referred to our hospital for further *** sonography was repeated,which revealed a mass with an alternating concentric echogenic ***(EGD)was performed under the initial impression of gastric cancer with central necrosis and showed a tortuous distortion of gastric folds down from the lesser curvature side to the duodenal bulb with stenosis of the gastric *** was barely passed through to the 2nd portion of the duodenum and a friable ulcerated mass was *** differential diagnoses were suspected,including gastroduodenal intussusception,gastric cancer invasion to the duodenum,or pancreatic cancer with adherence to the gastric antrum and *** computed tomography for further evaluation was arranged and showed gastroduodenal intussusception with a long stalk polypoid mass 5.9 cm in the duodenal *** the impression of gastroduodenal intussusception,ESD was performed at the base of the gastroduodenal intussusception;unfortunately,a gastric perforation was found after complete resection was accomplished,so gastrorrhaphy was performed for the perforation and retrieval of the huge polypoid *** gastric tumor was pathologically proved to be a *** the operation,there was no digestive disturbance and the patient was discharged uneventfully on the 10th day following the op

关键词： Gastric gastrointestinal stromal tumor Endoscopic submucosal dissection Gastro-duodenal intussusception Elderly Esophagogastroduodenoscopy Gastrointestinal obstruction Case report

Mechanochemical Metal-Free Synthesis of 3-Arylindenones via Unprecedented Aryl Swapping

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Chinese Journal of Chemistry 2022年第21期40卷 2539-2545页

作者： Liang Li Chuang Niu Guan-wu Wang Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technologyof ChinaHefeiAnhui230026China Department of Chemistry and Chemical Engineering Hefei Normal UniversityHefeiAnhui 230601China

A triflic anhydride-induced annulation of benzoic acids bearing electron-withdrawing groups with arylalkynes leading to diverse 3-arylindenones via an unprecedented aryl swapping pathway under an air atmosphere and ball-milling conditions has been *** of the obtained 3-arylindenones are fluorine-containing *** present mechanochemical protocol employs easily available and inexpensive benzoic acids,which unexpectedly undergo aryl swapping with arylalkynes and serve as the source of the 3-aryl *** current mechanochemical methodology shows advantages including no requirement of transition-metal catalysts,ambient conditions and excellent regioselectivity for the rearrangement products,providing expedient access to 3-arylindenones containing functional groups such as F,Cl,Br,CF3,OCF3,SCF3,OAc,Ac,CO_(2)Et or NO_(2).

关键词： Mechanochemistry Rearrangement 3-Arylindenones Carboxylic acids Alkynes Green chemistry

Link prediction in social networks: the state-of-the-art

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Science China(Information Sciences) 2015年第1期58卷 4-41页

作者： WANG Peng XU BaoWen wu YuRong ZHOU XiaoYu School of Computer Science and Engineering Southeast University State Key Laboratory of Software Engineering Wuhan University State Key Laboratory for Novel Software Technology Nanjing University

In social networks, link prediction predicts missing links in current networks and new or dissolution links in future networks, is important for mining and analyzing the evolution of social networks. In the past decade, many works have been done about the link prediction in social networks. The goal of this paper is to comprehensively review, analyze and discuss the state-of-the-art of the link prediction in social networks. A systematical category for link prediction techniques and problems is presented. Then link prediction techniques and problems are analyzed and discussed. Typical applications of link prediction are also addressed. Achievements and roadmaps of some active research groups are introduced. Finally, some future challenges of the link prediction in social networks are discussed.

关键词： social network link prediction dynamic network similarity metric learning model

Parallel Nanoimprint Forming of One-Dimensional Chiral Semiconductor for Strain-Engineered Optical Properties

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Nano-Micro Letters 2020年第11期12卷 242-254页

作者： Yixiu Wang Shengyu Jin Qingxiao Wang Min wu Shukai Yao Peilin Liao Moon JKim Gary JCheng Wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Department of Materials Science and Engineering University of Texas at DallasRichardsonTX 75080USA School of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA

The low-dimensional,highly anisotropic geometries,and superior mechanical properties of one-dimensional(1D) nanomaterials allow the exquisite strain engineering with a broad tunability inaccessible to bulk or thin-film *** capability enables unprecedented possibilities for probing intriguing physics and materials science in the 1-D *** the techniques for introducing controlled strains in 1D materials,nanoimprinting with embossed substrates attracts increased attention due to its capability to parallelly form nanomaterials into wrinkled structures with controlled periodicities,amplitudes,orientations at large scale with nanoscale ***,we systematically investigated the strain-engineered anisotropic optical properties in Te nanowires through introducing a controlled strain field using a resist-free thermally assisted nanoimprinting *** magnitude of induced strains can be tuned by adjusting the imprinting pressure,the nanowire diameter,and the patterns on the *** observed Raman spectra from the chiral-chain lattice of 1D Te reveal the strong lattice vibration response under the *** results suggest the potential of 1D Te as a promising candidate for flexible electronics,deformable optoelectronics,and wearable *** experimental platform can also enable the exquisite mechanical control in other nanomaterials using substrate-induced,on-demand,and controlled strains.

关键词： Chiral semiconductor Nanowires Nanoimprinting Strain engineering Optical property

Lifetime Calculations on Collector Optics from Laser Plasma Extreme Ultraviolet Sources with Minimum Mass

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Chinese Physics Letters 2011年第5期28卷 180-183页

作者： wu Tao WANG Xin-Bing wuhan National Laboratory for Optoelectronics School of Optoelectronic Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074 School of Science Wuhan Institute of TechnologyWuhan 430074

An ion flux and its kinetic energy spectrum are obtained using a self similar spherically symmetric fluid model of expansion of a collisionless plasma into *** to the ion flux and energy distribution,the collector optical lifetime is estimated by knowledge of the sputtering yield of conventional Mo/Si multilayer coatings for the CO_(2)and Nd:YAG pulsed-laser produced plasmas based on the minimum mass tin droplet target without debris *** results show that the longer wavelength of the CO_(2)laser produced plasma light source is more suitable for extreme ultraviolet lithography than Nd:YAG laser in respect of fast ion debris induced sputtering damage to the collector mirror.

关键词： lithography debris Extreme