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装备环境工程 2006年第1期3卷 77-80页

作者：李勤真马延平田润良赵世宜翟俊伟军事交通学院汽车指挥系 96374部队

针对军用物资集装箱储运过程中湿度对箱内军用物资的影响和影响箱内湿度变化的因素,系统地分析了箱内湿度的变化规律,并对箱内微气候环境湿度控制的条件进行了初步探讨。

关键词：军用物资集装箱储运湿度控制

MIA-UNet:Multi-Scale Iterative Aggregation U-Network for Retinal Vessel Segmentation

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Computer Modeling in Engineering & Sciences 2021年第11期129卷 805-828页

作者： linfang Yu zhen qin Yi Ding Zhiguang qin Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of ChinaChengdu610054China

As an important part of the new generation of information technology,the Internet of Things(IoT)has been widely concerned and regarded as an enabling technology of the next generation of health care *** fundus photography equipment is connected to the cloud platform through the IoT,so as to realize the realtime uploading of fundus images and the rapid issuance of diagnostic suggestions by artificial *** the same time,important security and privacy issues have *** data uploaded to the cloud platform involves more personal attributes,health status and medical application data of *** leaked,abused or improperly disclosed,personal information security will be ***,it is important to address the security and privacy issues of massive medical and healthcare equipment connecting to the infrastructure of IoT healthcare and health *** meet this challenge,we propose MIA-UNet,a multi-scale iterative aggregation U-network,which aims to achieve accurate and efficient retinal vessel segmentation for ophthalmic auxiliary diagnosis while ensuring that the network has low computational complexity to adapt to mobile *** this way,users do not need to upload the data to the cloud platform,and can analyze and process the fundus images on their own mobile terminals,thus eliminating the leakage of personal ***,the interconnection between encoder and decoder,as well as the internal connection between decoder subnetworks in classic U-Net are redefined and ***,we propose a hybrid loss function to smooth the gradient and deal with the imbalance between foreground and *** with the UNet,the segmentation performance of the proposed network is significantly improved on the premise that the number of parameters is only increased by 2%.When applied to three publicly available datasets:DRIVE,STARE and CHASE DB1,the proposed network achieves the accuracy/F1-score of 96.33%/84.34%

关键词： Retinal vessel segmentation security and privacy redesigned skip connection feature maps aggregation hybrid loss function

Effect of SiO_2 addition on the microstructure and electrical properties of ZnO-based varistors

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International Journal of Minerals,Metallurgy and Materials 2010年第1期17卷 86-91页

作者： zhen-hong Wu Jian-hui Fang Dong Xu qin-dong Zhong li-yi Shi Research Center of Nano Science and Technology Shanghai University Shanghai 200444 China School of Science Shanghai University Shanghai 200444 China School of Material Science and Engineering Shanghai University Shanghai 200072 China

The microstructure and electrical properties of ZnO-based varistors with the SiO2 content in the range of 0-1.00mol% were prepared by a solid reaction route. The varistors were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectrometry, inductively coupled plasma-atomic emission spectrometry, and X-ray photoelectron spectroscopy. The results indicate that the average grain size of ZnO decreases with the SiO2 content increasing. A new second phase （Zn2SiO4） and a glass phase （Bi2SiO5） are found. Element Si mainly exists in the grain boundary and plays an important role in controlling the Bi2O3 vaporization. The electric measurement shows that the incorporation of SiO2 can significantly improve the nonlinear properties of ZnO-based varistors, and the nonlinear coefficients of the varistors with SiO2 are in the range of 36.8-69.5. The varistor voltage reaches the maximum value of 463 V/mm and the leakage current reaches the minimum value of 0.11 μA at the SiO2 content of 0.75mol%.

关键词： inorganic materials varistor silicon dioxide electrical properties

Preparation of poly(lactide-co-glycolide)microspheres and evaluation of pharmacokinetics and tissue distribution of BDMC-PLGA-MS in rats

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Asian Journal of Pharmaceutical Sciences 2018年第1期13卷 82-90页

作者： Guozhuan li liang Yao Jing li Xiaoyan qin zhen Qiu Weidong Chen Anhui University of Chinese Medicine Hefei First People's Hospital

The aim of the present study was to develop a novel long-acting Poly(lactic-co-glycolic acid)(PLGA)-based microspheres formulation of Bisdemethoxycurcum(BDMC) by emulsionsolvent evaporation method. Meanwhile, the effects of the volume ratio of the dispersed phase and continuous phase, the concentration of PLGA and PVA, the theoretical drug loading and stirring speed were investigated. The mean diameter of the microspheres was 8.5 μm and the size distribution was narrow. The encapsulation efficiency(EE) and drug loading efficiency(DLE) of BDME loaded PLGA microspheres(BDMC-PLGA-MS) was 94.18% and 8.14%,respectively. In an in vitro study of drug release, it can be concluded that the BDMC-PLGAMS exhibited sustained and long-term release properties for 96 h. Stability studies suggested that the microspheres we prepared had a very good stability. Furthermore, the results of an in vivo study indicated that the BDMC-PLGA-MS had sustained release effect and was mainly distributed in the lung tissue, and less distribution in other tissues, which indicated that microspheres could be an effective parenteral carrier for the delivery of BDMC in lung cancer treatment.

关键词： Bisdemethoxycurcumin Microsphere Poly (lactic-co-glycolic acid) Solvent evaporation method Pharmacokinetics

A Service Relevance Based Matching Algorithm on Grid Environment

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 269-272页

作者： qin Wen-yan XU li-zhen HE Jie-yue Department of Computer Science and Engineering Southeast University Nanjing 210096 Jiangsu China

This paper presents a semantic metadata description model for grid services, and furthermore, a service relevance based matching algorithm is proposed. Some rea sonable parameters interpreting services characterizations are considered to advise matching process, whose weightiness and service relevance dramatically contribute to the decision making of service matching degree, And what＇s more, matching is secondly executed on the bases of experience adaptation of matching factors, which improves matching degree in gird service retrieve greatly.

关键词： grid ontology semantic metadata service relevance match

Toxic effects of acetochlor, methamidophos and their combination on nifH gene in soil

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Journal of Environmental Sciences 2007年第7期19卷 864-873页

作者： SU zhen-cheng ZHANG Hui-wen li Xin-yu ZHANG qin ZHANG Cheng-gang Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Toxic effects of two agrochemicals on nifH gene in agricultural black soil were investigated using denaturing gradient gel electrophoresis （DGGE） and sequencing approaches in a microcosm experiment. Changes of soil nifH gene diversity and composition were examined following the application of acetochlor, methamidophos and their combination. Acetochlor reduced the nifH gene diversity （both in gene richness and diversity index values） and caused changes in the nifH gene composition. The effects of acetochlor on nifH gene were strengthened as the concentration of acetochlor increased. Cluster analysis of DGGE banding patterns showed that nifH gene composition which had been affected by low concentration of acetochlor （50 mg/kg） recovered firstly. Methamidophos reduced nifH gene richness that except at 4 weeks. The medium concentration of methamidophos （150 mg/kg） caused the most apparent changes in nifH gene diversity at the first week while the high concentration of methamidophos （250 mg/kg） produced prominent effects on nifH gene diversity in the following weeks. Cluster analysis showed that minimal changes of nifH gene composition were found at 1 week and maximal changes at 4 weeks. Toxic effects of acetochlor and methamidophos combination on nifH gene were also apparent. Different nifH genes （bands） responded differently to the impact of agrochemicals： four individual bands were eliminated by the application of the agrochemicals, five bands became predominant by the stimulation of the agrochemicals, and four bands showed strong resistance to the influence of the agrochemicals. Fifteen prominent bands were partially sequenced, yielding 15 different nifH sequences, which were used for phylogenetic reconstructions. All sequences were affiliated with the alpha- and beta-proteobacteria, showing higher similarity to eight different diazotrophic genera.

关键词： agrochemicals acetochlor methamidophos toxic effects nifH gene PCR-DGGE

Genetic mutations associated with chemical resistance in the cytochrome P450 genes of invasive and native Bemisia tabaci （Hemiptera： Aleyrodidae） populations in China

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Insect Science 2009年第3期16卷 237-245页

作者： Bao-li Qiu li liu Xiao-Xi li Vartika Mathur zhen-Qiang qin Shun-Xiang Ren Department of Entomology South China Agricultural University Guangzhou China Department of Zoology Sri Venkateswara CollegeUniversity of Delhi Delhi 110021 India

Bemisia tabaci （Gennadius） is a species complex, and its two most damaging biotypes B and Q are globally distributed pests. Despite increasing biological and economic impacts, little is known about the evolutionary mechanisms that favor their competition with native populations. Here, we investigated the genetic mutations in the P450 gene of the invasive B, Q biotypes and the native Cv population. Four mutations associated with chemical resistance, Pro-Leu, Ala-Ser, Ser-Phe and Trp-Leu, were found in the cytochrome P450 CYP6C and CYP9F genes of the B and Q biotypes. Bioassay results also revealed that both the B and Q biotypes have about 12-47 times more resistance to acephate, beta- cypermethrin, methomyl, and 5-7 times more resistance to imidacloprid insecticide than Cv population. Our results provide a molecular approach for better understanding and monitoring the pesticide resistances of invasive and native B. tabaei populations in China.

关键词： Bemisia tabaci biotype cytochrome P450 gene genetic mutation pesticide resistance

Preparation of hydroxyapatite layer on Ti-based bulk metallic glasses by acid and alkali pre-treatment

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Rare Metals 2015年第1期34卷 22-27页

作者： Hao Hu zhen-Duo Cui Sheng-li Zhu Zhao-Yang li Yan-qin liang Xian-Jin Yang School of Materials Science and Engineering Tianjin University Tianjin Key Laboratory of Composite and Functional Materials

In this paper, a thin calcium phosphate layer was prepared on the surface of Ti4oZr10Cu36Pd14 bulk metallic glasses （BMGs）. All samples were dipped in HNO3 aqueous solution and boiled in 1.2 mol-L-I NaOH aqueous solution. After the two preliminary treatment steps, they were soaked in simulated body fluid （SBF） to form an apatite layer on the surface. After immersion for 12 days, a coating composed mainly of Ca-P particles was rapidly deposited on the surface of Ti40Zr10Cu36Pd14 bulk metallic glasses. The surfaces of chemically treated sam- ples and the samples after immersion in SBF were char- acterized by X-ray diffraction （XRD）, X-ray photoemission spectroscopy （XPS）, field emission scanning electron microscopy （FESEM）, and energy dispersive spectroscopy （EDS）. Analysis results indicate that this apatite coating consists of Ca-P particles with different diameters. In addition, the Ca/P ratio of the apatite coatings immersed for 14 days is 1.62, which is close to that of hydroxyapatite （HA）.

关键词： Metallic glass Titanium alloy Hydroxyapatite Thin film

Design of Central Management & Control Unit for Onboard High-Speed Data Handling System

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Journal of China University of Mining and Technology 2007年第1期17卷 68-72页

作者： li Yan-qin JIN Sheng-zhen NING Shu-nian Nattonal Astronomtcal Observatories Chinese Academy of Sciences Beijing 100012 China School of Mechanical Electronic ＆ Information Engineering China University of Mining ＆ Technology Beijing 100083 China

The Main Optical Telescope (MOT) is an important payload of the Space Solar Telescope (SST) with various instruments and observation modes. Its real-time data handling and management and control tasks are arduous. Based on the advanced techniques of foreign countries, an improved structure of onboard data handling systems feasible for SST, is proposed. This article concentrated on the development of a Central Management & Control Unit (MCU) based on FPGA and DSP. Through reconfigurating the FPGA and DSP programs, the prototype could perform different tasks. Thus the inheritability of the whole system is improved. The completed dual-channel prototype proves that the system meets all requirements of the MOT. Its high reliability and safety features also meet the requirements under harsh conditions such as mine detection.

关键词： space solar telescope processing dataflow and control-flow separately onboard data handling system reconfiguration

信息技术在军用集装箱运输管理中的集成应用研究

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物流科技 2008年第12期31卷 60-63页

作者：李勤真向群熊哲华王春刚曹继霞军事交通学院天津300161

从军用集装箱运输管理中的核心信息技术和集成军用集装箱运输管理信息技术两个方面,对信息技术在军用集装箱运输管理中的应用进行了研究和探讨,并对军用集装箱运输管理过程中信息技术应用程度进行了评价,为信息技术在军用集装箱运输管... 详细信息

从军用集装箱运输管理中的核心信息技术和集成军用集装箱运输管理信息技术两个方面,对信息技术在军用集装箱运输管理中的应用进行了研究和探讨,并对军用集装箱运输管理过程中信息技术应用程度进行了评价,为信息技术在军用集装箱运输管理中的集成应用指明了方向。

关键词：核心信息技术军用集装箱运输管理集成应用