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Chinese Science Bulletin 2010年第15期55卷 1568-1573页

作者： JI Jie LUO ChengLong sun Wei he Wei PEI Gang HAN ChongWei Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China

A newly designed solar collector named dual-function solar collector is *** dual-function solar collector integrated with building can perform in two different modes:working as a passive space heating collector in cold sunny days such as in winter,or working as a facade water heating collector in hot days such as in *** experimental study has been carried out to investigate the performance of the novel system in space heating mode,whilst,the dynamic numerical model has been established and *** experimental and numerical results show that during the period of the measurement from 9:00 to 17:00,the mean indoor temperature was up to 24.7°C while the mean ambient temperature was only 4.8°C,and a temperature stratification was present in the ***,a numerical study on the effect of optical property of coatings has been carried out.

关键词：太阳能集热器建筑一体化采暖方式数值模拟双功能实验被动式太阳能收集器

The Memory-Bounded Speedup Model and Its Impacts in Computing

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Journal of Computer Science & Technology 2023年第1期38卷 64-79页

作者：孙贤和鲁潇阳 Department of Computer Science Illinois Institute of TechnologyChicago 60616U.S.A.

With the surge of big data applications and the worsening of the memory-wall problem,the memory system,instead of the computing unit,becomes the commonly recognized major concern of ***,this“memorycentric”common understanding has a humble *** than three decades ago,the memory-bounded speedup model is the first model recognizing memory as the bound of computing and provided a general bound of speedup and a computing-memory trade-off *** memory-bounded model was well received even by *** was immediately introduced in several advanced computer architecture and parallel computing textbooks in the 1990’s as a must-know for scalable *** include *** Hwang’s book“Scalable Parallel Computing”in which he introduced the memory-bounded speedup model as the sun-Ni’s Law,parallel with the Amdahl’s Law and the Gustafson’s *** the years,the impacts of this model have grown far beyond parallel processing and into the fundamental of *** this article,we revisit the memory-bounded speedup model and discuss its progress and impacts in depth to make a unique contribution to this special issue,to stimulate new solutions for big data applications,and to promote data-centric thinking and rethinking.

关键词： memory-bounded speedup scalable computing memory-wall performance modeling and optimization data-centric design

Capacitance performance enhancement of TiO_2 doped with Ni and graphite

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Rare Metals 2009年第3期28卷 231-236页

作者： WANG Hong TANG Zhiyuan sun Lei he Yanbing WU Yaxian LI Zhongyan School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China McNair Technology Co. Ltd. Dongguan 523800 China

Nano-amorphous TiO2 was prepared by a sol-gel method. The results of X-ray diffraction （XRD） and scanning electron microscopy （SEM） show that the composite electrode material （TiO2-NiO-C） is made of powder with a grain size of 36.2 nm. Doping of nickel and graphite can increase the electrical conductivity and the specific surface area of nano-amorphous TiO2. The electrochemical properties of TiO2-NiO-C, such as self-discharge, leakage current, and cycle life, were studied using cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS）, and charge-discharge test. With a charge-discharge current density of 500 mA/g, the specific capacity of the TiO2-NiO-C composite material reaches 12.88 mAh/g. Also, the expense of capacity is only 3.88% after 500 cycles. The electrochemical capacitor with the electrode material of TiO2-NiO-C shows excellent capacity and cycling performance.

关键词： electrochemical capacitor metal oxide sol-gel method TiO2

Reevaluating Data Stall Time with the Consideration of Data Access Concurrency

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Journal of Computer Science & Technology 2015年第2期30卷 227-245页

作者：刘宇航孙贤和 Department of Computer Science Illinois Institute of Technology Chicago IL 60616-3793 U.S.A.

Data access delay has become the prominent performance bottleneck of high-end computing systems. The key to reducing data access delay in system design is to diminish data stall time. Memory locality and concurrency are the two essential factors influencing the performance of modern memory systems. However, existing studies in reducing data stall time rarely focus on utilizing data access concurrency because the impact of memory concurrency on overall memory system performance is not well understood. In this study, a pair of novel data stall time models, the L-C model for the combined effort of locality and concurrency and the P-M model for the effect of pure miss on data stall time, are presented. The models provide a new understanding of data access delay and provide new directions for performance optimization. Based on these new models, a summary table of advanced cache optimizations is presented. It has 38 entries contributed by data concurrency while only has 21 entries contributed by data locality, which shows the value of data concurrency. The L-C and P-M models and their associated results and opportunities introduced in this study are important and necessary for future data-centric architecture and algorithm design of modern computing systems.

关键词： memory wall data stall time memory concurrency concurrent average memory access time (C-AMAT)

Flexible Polydimethylsiloxane Composite with Multi-Scale Conductive Network for Ultra-Strong Electromagnetic Interference Protection

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Nano-Micro Letters 2023年第1期15卷 293-306页

作者： Jie Li he sun Shuang-Qin Yi Kang-Kang Zou Dan Zhang Gan-Ji Zhong Ding-Xiang Yan Zhong-Ming Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065People’s Republic of China

Highly conductive polymer composites(CPCs) with excellent mechanical flexibility are ideal materials for designing excellent electromagnetic interference(EMI) shielding materials,which can be used for the electromagnetic interference protection of flexible electronic *** is extremely urgent to fabricate ultra-strong EMI shielding CPCs with efficient conductive *** this paper,a novel silver-plated polylactide short fiber(Ag@PL ASF,AAF) was fabricated and was integrated with carbon nanotubes(CNT) to construct a multi-scale conductive network in polydimethylsiloxane(PDMS) *** multi-scale conductive network endowed the flexible PDMS/AAF/CNT composite with excellent electrical conductivity of 440 S m-1and ultra-strong EMI shielding effectiveness(EMI SE) of up to 113 dB,containing only 5.0 vol% of AAF and 3.0 vol% of CNT(11.1wt% conductive filler content).Due to its excellent flexibility,the composite still showed 94% and 90% retention rates of EMI SE even after subjected to a simulated aging strategy(60℃ for 7 days) and 10,000 bending-releasing *** strategy provides an important guidance for designing excellent EMI shielding materials to protect the workspace,environment and sensitive circuits against radiation for flexible electronic devices.

关键词： Flexible conductive polymer composites Silver-plated polylactide short fiber Carbon nanotube Electromagnetic interference shielding Multi-scale conductive network

Enabling materials informatics for ^(29)Si solid-state NMR of crystalline materials

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npj Computational Materials 2020年第1期6卷 1219-1225页

作者： he sun Shyam Dwaraknath Handong Ling Xiaohui Qu Patrick Huck Kristin A.Persson Sophia E.Hayes Department of Chemistry Washington UniversitySt.LouisMO 63130USA Lawrence Berkeley National Laboratory BerkeleyCA 94720USA Department of Materials Science and Engineering UC BerkeleyBerkeleyCA 94720USA

Nuclear magnetic resonance(NMR)spectroscopy is a powerful tool for obtaining precise information about the local bonding of materials,but difficult to interpret without a well-vetted dataset of reference *** ability to predict NMR parameters and connect them to three-dimensional local environments is critical for understanding more complex,long-range interactions.

关键词： spectra NMR crystalline

How should congenital absence of cruciate ligaments be treated? A case report and literature review

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World Journal of Clinical Cases 2019年第19期7卷 3082-3089页

作者： Ran Lu Dong-Ping Zhu Neng Chen he sun Ze-Hui Li Xue-Wei Cao Department of Orthopedics Guangdong Provincial Hospital of Traditional Chinese Medicine

BACKGROUND Hypoplasia of bilateral cruciate ligaments is a rare congenital *** diagnosis of such diseases and indications for the various treatment options require further analysis and *** SUMMARY The patient is a 26-year-old Chinese woman who has been suffering from knee pain since the age of 8 years,2-3 episodes a *** years ago,due to the practice of advanced yoga poses,the frequency of left knee pain increased,requiring prompt medical *** resonance imaging demonstrated an absence of both anterior and posterior cruciate ligaments of both knees with abnormal posterior tilting of the tibial *** subluxation of the knee joint was also found,therefore tibial osteotomy was *** patient reported at the 24 mo follow-up that the frequency of pain and instability had been reduced and function *** Osteotomy may be an effective method to treat patients with congenital cruciate ligament deficiency with posterior tibial plateau *** diagnosis of congenital cruciate ligament deficiency shall be based on the combination of patient’s medical history,clinical manifestations,and findings from imaging to avoid possible *** on the symptoms,frequency of attacks,and intent of the individual,appropriate treatment options shall be identified.

关键词： Congenital Dysplasia Cruciate ligament Congenital deformity Osteotomy Case report

Preoperative serum alkaline phosphatase： a predictive factor for early hypocalcaemia following parathyroidectomy of primary hyperparathyroidism

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Chinese Medical Journal 2014年第18期127卷 3259-3264页

作者： sun Longhao he Xianghui Liu Tong Department of General Sugery Tianjin Medical University GeneralHospital Tianjin 300052 China

Background Postoperative hypocalcemia is one of the most common complications following parathyroidectomy for primary hyperparathyroidism （PHPT）. The aim of this study was to analyze the predictive value of biochemical parameters as indicators for episodes of hypocalcemia in patients undergoing parathyroidectomy for PHPT. Methods The patients with PHPT who underwent parathyroidectomy between February 2004 and February 2014 were studied retrospectively at a single medical center. The patients were divided into biochemical, clinical, and no postoperative hypocalcemia groups, based on different clinical manifestations, Potential risk factors for postoperative hypocalcemia were identified and investigated by univariate and multivariate Logistic regression analysis. Results Of the 139 cases, 25 patients （18.0%） were diagnosed with postoperative hypocalcemia according to the traditional criterion. Univariate analysis revealed only alkaline phosphatase （ALP） and the small area under the curve （AUG） of receiver operating characteristics （ROC） curve for ALP demonstrates low accuracy in predicting the occurrence of postoperative hypocalcemia. Based on new criteria, 22 patients were added to the postoperative hypocalcemia group and similar biochemical parameters were compared. The serum ALP was a significant independent risk factor for postoperative hypocalcemia （P=0.000） and its AUC of ROC curve was 0.783. The optimal cutoff point was 269 U/L and the sensitivity and specificity for prediction were 89.2% and 64.3%, respectively. Conclusions The risk of postoperative hypocalcemia after parathyroidectomy should be emphasized for patients with typical symptoms of hypocalcemia despite their serum calcium level is in normal or a little higher range. Serum ALP is a predictive factor for the occurrence of postoperative hypocalcemia.

关键词： primary hyperparathyroidism minimally invasive parathyroidectomy postoperative hypocalcemia alkaline phosphatase

Deep carbon cycling during subduction revealed by coexisting diamond-methane-magnesite in peridotite

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National Science Review 2023年第10期10卷 15-17页

作者： Xiaoxia Wang Yilin Xiao Hans-Peter Schertl Nikolay V.Sobolev Yang-Yang Wang he sun Deshi Jin Dong-Bo Tan CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of China CAS Center for Excellence in Comparative Planetology Ruhr-University Bochum Faculty of Geosciences Institute of GeologyMineralogy and Geophysics V.S.Sobolev Institute of Geology and Mineralogy Siberian Branch of Russian Academy of Sciences School of Resources and Environmental Engineering Hefei University of Technology

Subduction is an important process for transferring materials from the surface into the deep *** subduction,recycled carbon can be released from the subducting slab to the mantle wedge through various decarbonation *** oxidized(CO2/CO32-) and reduced(CH4) carbon-bearing species have been discovered in(ultra)high-pressure(HP-UHP) subduction zones worldwide [1-3].Diamond is a typical index mineral for UHP metamorphism.

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Repetitive Learning Control for Time-varying Robotic Systems： A Hybrid Learning Scheme

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自动化学报 2007年第11期33卷 1189-1195页

作者： sun Ming-Xuan he Xiong-Xiong CheN Bing-Yu College of Information Engineering Zhejiang University of Technology Hangzhou 310032 F. R. China

重复学习控制为不明确的变化时间的机器的系统追踪的 finite-time-trajectory 被介绍。在时间函数以一个反复的学习方法被学习的地方，一个混合学习计划被给在系统动力学应付经常、变化时间的 unknowns，没有泰勒表示的帮助，当常规微... 详细信息

重复学习控制为不明确的变化时间的机器的系统追踪的 finite-time-trajectory 被介绍。在时间函数以一个反复的学习方法被学习的地方，一个混合学习计划被给在系统动力学应付经常、变化时间的 unknowns，没有泰勒表示的帮助，当常规微分学习方法为估计经常的被建议时。介绍重复学习控制为在每个周期的开始的起始的重新定位避免要求，是不同的，并且变化时间的 unknowns 不是必要的周期。随混合学习的采纳，靠近环的系统的州的变量的固定被保证，追踪的错误被保证作为重复增加收敛到零，这被显示出。建议计划的有效性通过数字模拟被表明。

关键词：重复学习控制机器人时序变化系统混合学习计划