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Zn and Ag Co-doped Anti-microbial TiO_2 Coatings on Ti by Micro-arc Oxidation

Journal of Materials Science & Technology 2016年第9期32卷 919-924页

作者： lan Zhang qin Gao Yong Han State-key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

Micro-porous TiO2 coatings co-doped with Zn^2＋ and Ag nanoparticles were fabricated on Ti by microarc oxidation （MAO） for 0.5, 1.5, 2 and 4 min, respectively. The evolutions of morphology and phase component of the coating as a function of processing time were investigated. The microstructure of the 2 min treated coating was further observed by transmission electron microscopy to explore the coating formation mechanism. The amounts of Ag and Zn released from the 2 min treated coating were measured and the antibacterial properties of the coatings against Staphylococcus aureus （S. aureus） were also investigated. The obtained results showed that with prolonged MAO time, the contents of Ag and Zn on the coating surfaces increased. All the coatings were micro-porous with pore diameters of 1 -4μm; however, some pores were blocked by deposits on the 4 min treated coating. The 2 rain treated coating was composed of amorphous TiO2, anatase, futile, ZnO, Zn2TiO4 and homogenously distributed Ag nanoparticles. After immersion, Zn^2＋, Ag^＋, Ti^2＋ and Ca^2＋ were released from the coating and with the immersion time prolonged, the accumulated concentrations of these ions increased. After immersion for 36 weeks, the accumulated Zn2. and Ag^＋ concentrations were 6.88 and 0.684 ppm, respectively, which are higher than the minimal inhibitory concentration but much lower than the cytotoxic concentration. Compared with polished Ti control, the coatings co-doped with Zn^2＋ and Ag nanoparticles significantly inhibited the ad- hesions of S. uureus and reduced the amounts of planktonic bacteria in culture medium, indicating that the Zn and Ag co-doped TiO2 could be a bio-adaptable coating for long-lasting anti-microbial performance.

关键词： Zn Ag nanoparticle Co-doped TiO2 Micro-arc oxidation Bio-adaptable

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与图像内容无关的聚焦程度评价方法

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西安交通大学学报 2025年第1期59卷 116-124页

作者：夏晓华柴玉琳岳鹏举杨治秦绪芳长安大学道路施工技术与装备教育部重点实验室西安710000

针对现有的聚焦程度评价方法在图像场景内容改变时不能正确评价图像聚焦程度的问题,基于“分类+拟合”的思想,提出了一种与高斯模糊标准差完全等价的图像聚焦程度评价方法。首先,建立了以有限高斯模糊标准差为标记的图像聚焦程度分类数... 详细信息

针对现有的聚焦程度评价方法在图像场景内容改变时不能正确评价图像聚焦程度的问题,基于“分类+拟合”的思想,提出了一种与高斯模糊标准差完全等价的图像聚焦程度评价方法。首先,建立了以有限高斯模糊标准差为标记的图像聚焦程度分类数据集;然后,构建了用于提取图像高斯模糊标准差分类分数的非对称核卷积神经网络(AKC-net);最后,采用三次样条插值函数拟合AKC-net全连接层输出的分类分数以及对应的高斯模糊标准差,以最大分数对应的标准差作为图像的聚焦程度评价结果,并在Waterloo数据集和实际拍摄图像上分别进行仿真实验和实拍实验。结果表明:所提方法在不同聚焦图像上分类的平均准确率可达到97.7%,得到的评价结果与高斯模糊标准差真值的均方根误差和平均绝对误差均小于0.07,且实际拍摄图像的聚焦测度值与图像内容无关,实现了图像聚焦程度的绝对评价。

关键词：聚焦程度评价高斯模糊标准差非对称核卷积神经网络三次样条插值

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Quzhi Formula Alleviates Nonalcoholic Steatohepatitis by Impairing Hepatocyte Lipid Accumulation and Inflammation via Bip/eIF2α Signaling

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Journal of Clinical and Translational Hepatology 2022年第6期10卷 1050-1058页

作者： Yue-lan Wu Jiao-Xiang Wu Ting-Ting Shen Hai-Sheng chai Hui-Fen Chen qin Zhang Tongren Hospital Shanghai Jiao Tong University School of MedicineShanghaiChina Hongqiao International Institute of Medicine Tongren HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Clinical Laboratory Tongren HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Infec-tious Diseases Tongren HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai municipal Hospital of Traditional Chinese Medicine Shanghai University of Traditional Chinese MedicineShanghaiChina Depart-ment of Laboratory Medicine Shanghai First Maternity and Infant HospitalSchool of MedicineTongji UniversityShanghaiChina Phase I Clinical Trial Unit Tongren HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Background and Aims:The Quzhi formula,a Chinese med-icine compound prescription,relieves nonalcoholic steato-hepatitis(NASH)*** study aimed to explore the mechanism of the Quzhi formula against ***:A choline-deficient,L-amino acid-defined,high-fat diet induced a NASH mouse model and a free fatty acid-induced mouse hepatocyte cell model were used to evaluate the function of Quzhi formula in vivo and in *** pharmacol-ogy and molecular docking technology were performed to uncover the possible protective mechanisms of the Quzhi formula against *** factors in liver lipid metabolism and endoplasmic reticulum(ER)stress pathway were evalu-ated to verify the ***:The positive contri-bution of the Quzhi formula on NASH was confirmed in vivo and in *** accumulation of lipid in the liver and inflammatory responses were significantly decreased by the Quzhi *** pharmacological analysis and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis showed that the Quzhi formula protected against NASH by regulating ER stress and inflammatory responses,which was enhanced by further molecular docking *** addition,mechanism exploration showed that Quzhi formula mainly reduced ER stress by downregulating Bip/eIF2α***:The Quzhi formula protected against NASH by inhibiting lipid accumulation,ER stress,and inflammatory responses,which supports the potential use of Quzhi formula as an alternative treatment for NASH.

关键词： Quzhi formula NASH NAFLD ER stress Inflammation

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Common blackbirds Turdus merula use anthropogenic structures as nesting sites in an urbanized landscape

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Current Zoology 2015年第3期61卷 435-443页

作者： YanDingWANG qin HUANG Sisi lan qin ZHANG Shuihua CHEN The Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education College of Life Sciences Zhejiang University Hangzhou 310058 China Zhejiang Museum of Natural History Hangzhou 310014 China College of Chemistry and Life Sciences Zhejiang Normal University Jinhua 321004 China

The common blackbird Turdus merula is one of the most highly urbanized bird species. However, to date, the use of anthropogenic structures as nesting sites in the common blackbird is rarely documented, and the factors influencing its use of the anthropogenic structures as nesting sites remain unclear. In this study, we systematically quantified and determined the factors in- fluencing the use of anthropogenie structures as nesting sites in common blackbirds in a highly urbanized city of Hangzhou, Chi- na. We searched for nests of common blackbirds during four breeding seasons from 2010 to 2013. Among the 60 nests found, 34 nests were in anthropogenic structures such as wall ledges, air condition mounts, window canopies, cable poles, guardrails, eaves, balcony frames, flowerpots and flower shelves on balconies. We found that the available anthropogenic nest sites and the availa- ble nesting trees were main factors determining the use of anthropogenic structures as nesting sites in common blackbirds. In ur- ban environments, the amount of available anthropogenic nesting sites increased significantly, whereas the number of natural nesting sites reduced greatly. Our results suggest that common blackbirds can adjust their nest sites in response to urbanization and such nesting behavior shifts may aid them to colonize urban environments. From a management viewpoint, our results indi- cate that behavioral flexibility should be taken into account for effective urban wildlife management and conservation

关键词： Adaptation Anthropogenic nest Behavioral flexibility Colonization Urbanization

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Further results on cloud control systems

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Science China(Information Sciences) 2016年第7期59卷 232-236页

作者： Yuanqing XIA Yongming qin Di-Hua ZHAI Senchun chai School of Automation Key Laboratory of Intelligent Control and Decision of Complex SystemsBeijing Institute of Technology

This paper is devoted to further investigating the cloud control systems(CCSs). The benefits and challenges of CCSs are provided. Both new research results of ours and some typical work made by other researchers are p... 详细信息

关键词： cloud control systems cloud computing cyber-physical systems networked control systems big data

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Endurable SSD-Based Read Cache for Improving the Performance of Selective Restore from Deduplication Systems

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Journal of Computer Science & Technology 2018年第1期33卷 58-78页

作者： Jian Liu Yun-Peng chai Xiao qin Yao-Hong Liu Division of Computer Science and Engineering Louisiana State University Baton Rouge LA 70803 U.S.A. Key Laboratory of Data Engineering and Knowledge Engineering Ministry of Education of China Beijing 100872 China School of Information Renmin University of China Beijing 100872 China Shelby Center for Engineering Technology Department of Computer Science and Software Engineering Samuel Ginn College of Engineering Auburn University Auburn AL 368~9-53~7 U.S.A.

Deduplication has been commonly used in both enterprise storage systems and cloud storage. To overcome the performance challenge for the selective restore operations of deduplication systems, solid-state-drive-based （i.e., SSD-based） re^d cache cm, be deployed for speeding up by caching popular restore contents dynamically. Unfortunately, frequent data updates induced by classical cache schemes （e.g., LRU and LFU） significantly shorten SSDs＇ lifetime while slowing down I/O processes in SSDs. To address this problem, we propose a new solution -- LOP-Cache to greatly improve tile write durability of SSDs as well as I/O performance by enlarging the proportion of long-term popular （LOP） data among data written into SSD-based cache. LOP-Cache keeps LOP data in the SSD cache for a long time period to decrease the number of cache replacements. Furthermore, it prevents unpopular or unnecessary data in deduplication containers from being written into the SSD cache. We implemented LOP-Cache in a prototype deduplication system to evaluate its pertbrmance. Our experimental results indicate that LOP-Cache shortens the latency of selective restore by an average of 37.3% at the cost of a small SSD-based cache with only 5.56% capacity of the deduplicated data. Importantly, LOP-Cache improves SSDs＇ lifetime by a factor of 9.77. The evidence shows that LOP-Cache offers a cost-efficient SSD-based read cache solution to boost performance of selective restore for deduplication systems.

关键词： data deduplication solid state drive (SSD) flash cache endurance

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Efficient hardware-based private information retrieval using partial reshuffle

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High Technology Letters 2010年第3期16卷 263-267页

作者： lan Tian qin Zhiguang School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 P.R. China

The paper proposes a novel hardware-based private information retrieval （HWPIR） protocol. By partially reshuffling previously accessed items in each round, instead of frequently reshuffling the whole database, the scheme makes better use of shuffled data copies and achieves the computation overhead at O（/N/K）,where N and k are the sizes of the database and secure storage respectively. For securestorage with moderate size, e.g. k = O（/N）, the overhead is 0（4/N）. The result is much better than the state-of-art schemes （as compared to e.g. O（log2N））. Without increasing response time and communication cost, the proposed protocol is truly practicable regardless of the database size. The security and preformance of the protocol is formally analyzed.

关键词： private information retrieval (PIR) trusted hardware reshuffle security practicality

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Optimization of MAC algorithm based on IEEE 802.15.4 in indoor positioning system

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High Technology Letters 2021年第1期27卷 86-94页

作者： Sun Guanyu qin Danyang lan Tingting Key Laboratory of Electronic and Communication Engineering Heilongjiang UniversityHarbin 150080P.R.China

The mobility of the targets asks for high requirements of the locating speed in indoor positioning *** standard medium access control(MAC)algorithm will often cause lots of packet conflicts and high transmission delay if multiple users communicate with one beacon at the same time,which will severely limit the speed of the ***,an optimized MAC algorithm is proposed based on channel reservation to enable users to reserve beacons.A frame threshold is set to ensure the users with shorter data frames do not depend on the reservation mechanism,and multiple users can achieve packets switching with relative beacon in a fixed sequence by using frequency division multiplexing *** simulation results show that the optimized MAC algorithm proposed in this paper can improve the positioning speed significantly while maintaining the positioning ***,the positioning accuracy can be increased to a certain extent if more channel resources can be obtained,so as to provide effective technical support for the location and tracking applications of indoor moving targets.

关键词： medium access control(MAC)algorithm indoor positioning multi-channel fingerprint identification IEEE 802.15.4

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Variation in reproductive life-history traits of Chinese Bulbuls(Pycnonotus sinensis)along the urbanization gradient in Hangzhou,China

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Avian Research 2023年第2期14卷 174-181页

作者： Xingmin Chen qin Zhang Sisi lan qin Huang Shuihua Chen Yanping Wang Laboratory of Island Biogeography and Conservation Biology College of Life SciencesNanjing Normal UniversityNanjing210023China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua321004China Zhejiang Museum of Natural History Hangzhou310012China Zhejiang Provincial Museum Hangzhou310007China

Urbanization brings new selection pressures to wildlife living in cities,and changes in the life-history traits of urban species can reflect their responses to such *** date,most of the studies investigating the impacts of urbanization on avian life-history traits are conducted in Europe and North America,while such studies are often lacking in quickly developing countries in Asia(e.g.,China).In this study,we examined the variations in reproductive life-history traits of Chinese Bulbuls(Pycnonotus sinensis)along the urbanization gradient in Hangzhou,*** detected 234 natural nests of Chinese Bulbuls and continuously monitored them in two continuous breeding seasons from 2012 to *** collected data on seven life-history traits(laying date,incubation period,nestling period,clutch size,egg volume,hatching success rate,and fledging success rate).We used infrared cameras to record the number of feedings per hour as the measure of food resources for the *** measured nest predation pressure by monitoring 148 natural breeding nests during breeding seasons and 54 artificial nests immediately after breeding *** then calculated the urbanization synthetic index(USI)as a measure of the level of urbanization and examined its relationship with the seven life-history *** found that Chinese Bulbuls laid eggs significantly earlier with increasing ***,the other six life-history traits did not vary significantly with the ***,the feeding frequency of chicks increased significantly with the USI,but the nest predation pressure of Chinese Bulbuls decreased significantly with the *** food resources and reduced nest predation pressure in cities may lead to earlier laying date of Chinese *** study should test whether the earlier laying date of Chinese Bulbuls is the result of phenotypic plasticity or genetic change.

关键词： Feeding frequency Laying date Life-history trait Nest predation Urbanization Urbanization synthetic index(USI)

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Mechanical-electrical synergy damage effect on GaN HEMT under high-power microwave

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Science China(Technological Sciences) 2023年第8期66卷 2373-2380页

作者： WANG Lei chai ChangChun ZHAO TianLong LI FuXing qin YingShuo YANG YinTang Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian UniversityXi’an 710071China

High-power microwave damage to enhanced-mode Ga N high electron mobility transistors(HEMT)is studied considering the mechanical-electrical synergy effect due to the strong piezoelectric properties of Ga N,which has a wurtzite crystal *** on the piezoelectric constitutive equation,the mechanical and electrical energies were equivalently coupled,and the effective numerical model was built in the simulation *** results indicated that a part of the electrical energy was stored in the device as a form of elastic energy,causing the burnout time of Ga N HEMT to be *** effects of different injection voltages and frequencies were analyzed,and the results revealed that elastic energy plays a different role during the process of device *** results are of great significance for the design of Ga N HEMTs with better reliability in harsh electromagnetic environments and for improving their protection design.

关键词： GaN HEMT mechanical-electrical synergy damage electromechanical coupling elastic energy high-power microwave

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