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Vision-based adaptive variable rate spraying approach for unmanned aerial vehicles

International Journal of Agricultural and Biological Engineering 2019年第3期12卷 18-26页

作者： Linhui Wang Yubin Lan Xuejun Yue Kangjie ling Zhenzhao cen Ziyao Cheng Yongxin Liu Jian Wang International Laboratory of Agricultural Aviation pesticide Spraying Technology(ILAApST) Guangzhou 510642China College of Electronic Engineering South China Agricultural UniversityGuangzhou 510642China College of Engineering South China Agricultural UniversityGuangzhou 510642China School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510640China

The rapid developments of unmanned aerial vehicles(UAV)and vision sensor are contributing a great reformation in precision *** can fly their UAV spraying pesticides around their crop fields while staying at their remote control room or any place that is separated from their farm ***,there is a common phenomenon in rice planting management stage that some empty areas are randomly located in ***,a critical problem is that the waste of pesticides that occurs when spraying pesticides over rice fields with empty areas by using the common UAV,because it is difficult to control the flow accuracy based on the empty areas *** tackle this problem,a novel vision-based spraying system was proposed that can identify empty areas automatically while spraying a precise amount of pesticides on the target *** this approach,the image was preprocessed with the Lucy-Richardson algorithm,then the target area was split from the background with k-means and the feature parameters were extracted,finally the feature parameters were filtered out with a positive contribution which would serve as the input parameters of the support vector machine(SVM)to identify the target *** a fuzzy control model was analyzed and exerted to compensate the nonlinearity and hysteresis of the variable rate spraying *** results proved that the approach was applicable to reducing the amount of pesticides during UAV spraying,which can provide a reference for precision agriculture aviation in the future.

关键词： vision sensor UAV adaptive spray variable rate spraying fuzzy control empty area precision agriculture aviation

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Effect of Na(Ⅰ)-H2O clusters on self-assembly of sandwich-type U(Ⅵ)-containing silicotungstates and the efficient catalytic activity for the synthesis of substituted phenylsulfonyl-1H-pyrazoles

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Tungsten 2022年第2期4卷 149-157页

作者： Ke Li Xiao-ling Lin Kai Zeng Xiao-Fei Gao Wei cen Yu-Feng Liu Guo-p.ng Yang Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation Jiangxi Province Key Laboratory of Synthetic ChemistryEast China University of TechnologyNanchang330013China Russia School of Social and Human Sciences-International Relations Tyumen State UniversityTyumen625003Russia

In this study,a sandwich-type uranium(Ⅵ)-containing silicotungstate KNa11H2(H2O)30[Na(UO2)(SiW9O34)]2·8H2O(1)with new three-dimensional(3D)structure was synthesized and characterized using single-crystal X-ray diffraction,Fourier transform infrared,Raman,solid-state ultraviolet–visible diffuse reflection spectra,thermogravimetric analysis and powder X-ray *** crystal analysis revealed that the Na(I)-H2O clusters in 1 showed a two-dimensional structure similar to(4,4)-network and resulted in the formation of a new 3D structure of *** addition,it was notable that 1 presented excellent catalytic activity for the synthesis of substituted phenylsulfonyl-1H-pyrazoles via the cyclization reaction of 1,3-diketones with various substituted benzenesulfonyl hydrazides.

关键词： Uranium polyoxotungstates Condensation reaction phenylsulfonyl-1H-pyrazoles

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新冠病毒轻型感染对献血者血液学指标及捐献单采血小板适宜性的影响

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中国实验血液学杂志 2024年第3期32卷 883-889页

作者：黄淑铭林小枚江伟梅纪淑华林授林洪铿陈岑褚晓凌福建省血液中心福建福州350004

目的:通过对新冠病毒Omicron变异株轻型感染献血者血液学指标的变化分析,探讨新冠病毒轻型感染对成人血液学指标的影响,进而评估其对捐献单采血小板适宜性的影响。方法:以2022年12月-2023年1月期间出现新冠病毒轻型感染症状、连续捐献... 详细信息

目的:通过对新冠病毒Omicron变异株轻型感染献血者血液学指标的变化分析,探讨新冠病毒轻型感染对成人血液学指标的影响,进而评估其对捐献单采血小板适宜性的影响。方法:以2022年12月-2023年1月期间出现新冠病毒轻型感染症状、连续捐献单采血小板3次的72例献血者(其中阳性组42例,疑似感染组30例)和2022年10月-11月期间未接种新冠疫苗、未感染新冠病毒、连续捐献3次单采血小板的42例献血者(对照组)为研究对象,通过重复测量方差分析法回顾性比较阳性组和疑似感染组出现症状前(Time1)后(Time2和Time3)及对照组连续3次(Time1、Time2、Time3)的血常规变化,并采用贝叶斯判别法建立近期是否感染新冠病毒的判别方程式。结果:阳性组和疑似感染组组内测量次数的简单效应显著(F_(阳性组)=6.98,pppLT与pCT明显升高(ppp=0.55,偏η^(2)=0.34);组内3次血常规指标差异无统计学意义(p>0.05)。建立“近期是否感染新冠病毒”的判别方程式,方程特征值是0.22,典型相关性为0.43(χ^(2)=27.81,ppLT、pCT、RDW-CV和RDW-SD呈动态变化,近期是否感染新冠病毒的判别方程式有较高的准确率。

关键词：新型冠状病毒2(SARS-CoV-2) 新型冠状病毒感染(COVID-19) 血常规单采血小板 SARS-CoV-2 IgG抗体

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An upgraded polymeric composite with interparticle chemical bonding microstructure toward lithium-ion battery separators with enhanced safety and electrochemical performances

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能源化学:英文版 2023年第9期84卷 402-413页

作者： Qian Zhao ling Ma Ye Xu Xiulong Wu Shuai Jiang Qiaotian Zheng Guang Hong Bin He Chen Li Wanglai cen Wenjun Zhou Yan Meng Dan Xiao College of Mechanical Engineering Chengdu UniversityChengdu 610106SichuanChina Institute for Advanced Study Chengdu UniversityChengdu 610106SichuanChina Chongqing Academy of Metrology and Quality Inspection Chongqing 401121China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065SichuanChina

A composite separator of SiC/pVDF-HFp was synthesized for lithium-ion batteries with high thermal and mechanical *** from the nanoscale,high hardness,and melting point of SiC,SiC/pVDFHFp with highly uniform microstructure was *** polarization caused by barrier penetration was significantly *** to the Si-F bond between SiC and pVDF-HFp,the structural stability has been obviously enhanced,which could suppress the growth of lithium(Li) ***,some 3D reticulated Si nanowires are found on the surface of Li anode,which also greatly inhibit Li dendrites and result in irregular flakes of Li ***,the shrinkage of 6% SiC/pVDF-HFp at 150℃ is only 5%,which is notably lower than those of pVDF-HFp and *** commercial LiFepO_(4) cell assembled with 6% SiC/pVDF-HFp possesses a specific capacity of 157.8 mA h g^(-1) and coulomb efficiency of 98% at 80℃.In addition,the tensile strength and modulus of 6% SiC/pVDF-HFp could reach 14.6 and 562 Mpa,*** a small deformation(1000 nm) and strong deformation recovery are obtained under a high additional load(2.3 mN).Compared with pVDF-HFp and Celgard2500,the symmetric Li cell assembled with 6% SiC/pVDF-HFp has not polarized after 900 cycles due to its excellent mechanical *** strategy provides a feasible solution for the composite separator of high-safety batteries with a high temperature and impact resistance.

关键词： SiC pVDF-HFp Composite separator Thermal stability Mechanical stability High safety battery

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Stem cell factor-mediated wild-type KIT receptor activation is critical for gastrointestinal stromal tumor cell growth

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World Journal of Gastroenterology 2012年第23期18卷 2929-2937页

作者： Chen-Guang Bai Xiao-Wei Hou Feng Wang cen Qiu Yan Zhu ling Huang Jing Zhao Jing-Jing Xu, Da-Lie Ma Department of pathology Changhai Hospital Second Mili- tary Medical University Shanghai 200433 China Institute of Surgery Changhai Hospital Second Military Medical University Shanghai 200433 China Laboratory of Mo- lecular pathology Changhai Hospital Second Military Medical University Shanghai 200433 China

AIM: To clarify the biological role of stem cell factor (SCF)-mediated wild-type KIT receptor activation in gastrointestinal stromal tumor (GIST) growth. METHODS: The co-expression of wild-type KIT receptor and SCF was evaluated in 51 GIST samples using mutation analysis and immunohistochemistry, and the results were correlated with clinicopathological param- eters, including the mitotic count, proliferative index (Ki-67 immunohistochemical staining), mitotic index (phospho-histone H3 immunohistochemical staining) and apoptotic index (terminal deoxynucleotidyl transferase-mediated dUTp-biotin nick end labeling). Using primary cultured GIST cells, the effect of SCF-mediated wild-type KIT receptor activation was determined by western blotting, methyl thiazolyl tetrazolium (MTT), and apoptosis assays. RESULTS: We found that wild-type KIT receptor and SCF protein were expressed in 100% and 76.5% of the 51 GIST samples, respectively, and the co-expression of wild-type KIT receptor and SCF was associated with known indicators of poor prognosis, including larger tumor size (p = 0.0118), higher mitotic count (p = 0.0058), higher proliferative index (p = 0.0012), higher mitotic index (p = 0.0282), lower apoptosis index (p = 0.0484), and increased National Institutes of Health risk level (p = 0.0012). We also found that the introduction of exogenous SCF potently increased KIT kinase activity, stimulated cell proliferation (p poptosis (p ng antibody suppressed proliferation (p = 0.01) and promoted apoptosis (p pe KIT receptor activation plays an important role in GIST cell growth. The inhibition of SCF-mediated wild-type KIT receptor activation may prove to be particularly important for GIST therapy.

关键词： Gastrointestinal stromal tumor Stem cellfactor Wild-type KIT receptor Cell growth In vitro

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Identification and characterization of loop7 motif and its role in regulating biological function of human ApOBEC3G through molecular modeling and biological assay

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Acta pharmaceutica Sinica B 2017年第5期7卷 571-582,616页

作者： Congjie Zhai ling Ma Zhixin Zhang Jiwei Ding Jing Wang Yongxin Zhang Xiaoyu Li Fei Guo Liyan Yu Jinming Zhou Shan cen Institute of Medicinal Biotechnology Chinese Academy of Medical Science Institute of pathogen Biology Chinese Academy of Medical Science

Human ApOBEC3G(h A3G) is a cytidine deaminase which inhibits HIV-1 replication. The HIV-1 accessory protein viral infectivity factor(Vif) counteracts with hA3G by targeting it for proteasomal degradation. In this work, we constructed and optimized molecular models of the hA3G dimer and the h A3G–Vif complex. The molecular modeling study revealed that the loop7 motif of hA3G appears on the interfaces of both the h A3G–Vif complex and the hA3G dimer. Biochemical analysis provided evidence suggesting that binding of Vif to hA3G results in steric blocking of hA3G dimerization, implying that monomeric hA3G serves as a substrate for Vif-mediated ***, we presented evidence for the important roles of the loop7 motif, especially the central residues within the region, in hA3G dimerization, h A3G–Vif interaction, Vif-mediated hA3G degradation as well as subcellular localization of hA3G. This work highlights a multiple-task interface formed by loop7 motif, which regulates biological function of hA3G, thus providing the feasibility of the strategy of blocking Vif-mediated A3 G degradation by targeting the putative site around loop7.

关键词： HIV Vif ApOBEC3G Motif Modeling hA3G–Vif complex hA3G dimer

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First Report of Botryosphaeria dothidea Causing Sweet Osmanthus Leaf Dieback in China

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Agricultural Sciences in China 2010年第6期9卷 847-853页

作者： XIE ling HUAng Si-liang cen Zhen-lu LU Wei-hong QIN Bi-xia TAng Chen-guang HU Chun-jin QIN Li-p.ng Microbiology Research Institute Guangxi Academy of Agricultural Sciences Nanning 530007 P.R. China College of Life Sciences and Technology Nanyang Normal University Nanyang 473061 P.R.China College of Agriculture Guangxi University Nanning 530005 P.R.China plant protection Research Institute Guangxi Academy of Agricultural Sciences Nanning 530007 P.R. China College of Agriculture Yangtze University Jingzhou 434025 P.R. China

Sweet osmanthus is one of the ten traditional famous flowers in *** occurrence of the diseases caused by fungi other than Botryosphaeria *** been reported mainly from China on sweet osmanthus.A leaf dieback of sweet osmanthus caused by Botryosphaeria *** found for the first time in 2007 in Nanning City,Guangxi,*** objectives of the present study were to isolate and characterize the causal organism of sweet osmanthus leaf *** fungus was isolated from the lesions of affected sweet osmanthus leaves and its pathogenicity to sweet osmanthus was confirmed using a detached-leaf-inoculation *** identification of the pathogen was carried out mainly based on the morphological characters and molecular analysis of internal transcribed spacer （ITS） *** morphological characters of the pathogenic isolate GHX6 were agreed with that of Botryosphaeria *** ITS sequence of the isolate was amplified with primers ITS1 and ITS4,and submitted to GenBank （accession ***368251）.Molecular analysis based on ITS sequence comparison between the isolate GHX6 and the other related fungi derived from GenBank supported that the causal agent of the sweet osmanthus leaf dieback belonged to Botryosphaeria *** is the first report of Botryosphaeria dothidea causing leaf dieback on sweet osmanthus in China.

关键词： sweet osmanthus leaf dieback pathogen identification Botryosphaeria dothidea

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Fundamental research on the size and velocity measurements of coal powder by trajectory imaging

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Journal of Zhejiang University-Science A(Applied physics & Engineering) 2013年第5期14卷 377-382页

作者： Xue-cheng WU Ying-chun WU Cong-chang ZHAng Guo-neng LI Qun-xing HUAng ling-hong CHEN Kun-zan QIU Hao ZHOU Ke-fa cen State Key Laboratory of Clean Energy Utilization Zhejiang University Institute for New Energy and Energy Saving Technology Zhejiang University of Science and Technology

A trajectory imaging based method for measuring the velocity and diameter of coal particles was *** using an industrial charge-coupled device(CCD)camera and a low power semiconductor laser,the images of coal particles under relatively long exposure time were recorded and then processed to yield both the velocities and *** research on this method with special attention to recording parameters,e.g.,magnification factor and exposure time,was carried *** most of the test cases,the results agree with those obtained by particle image velocimetry(pIV)and shadow imaging *** with good accuracy can be obtained when the imaging magnification factor and exposure time are set appropriately,making N be larger than 3.5,and R between 5-7,where N and R are the number of pixels occupied by the average width and the ratio of length to width of particle trajectory on the image,*** work indicates the feasibility and potential application of the present measurement method for online measurement of coal powder in pipes in industrial power plants.

关键词： Trajectory imaging Velocity measurement Size measurement Coal powder

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抗黑色素瘤分化相关基因5抗体阳性皮肌炎的预后因素研究进展

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中华全科医学 2024年第10期22卷 1755-1760页

作者：张岑白灵李飞飞赵佩佩禚萃马文兰张思功兰州大学第二临床医学院甘肃兰州730030 青海大学附属医院风湿免疫科青海西宁810000 兰州大学第二医院风湿免疫科甘肃兰州730030

抗黑色素瘤分化相关基因5抗体阳性皮肌炎是特发性炎性肌病的一种特殊亚型,以皮肌炎的特征性皮损和间质性肺病为主要特点,易发生快速进展性间质性肺病,患者6个月死亡率极高,且不同个体之间的预后存在很大差异,因此早期预后评估对制定个... 详细信息

抗黑色素瘤分化相关基因5抗体阳性皮肌炎是特发性炎性肌病的一种特殊亚型,以皮肌炎的特征性皮损和间质性肺病为主要特点,易发生快速进展性间质性肺病,患者6个月死亡率极高,且不同个体之间的预后存在很大差异,因此早期预后评估对制定个体化诊疗方案具有重要意义。现有研究表明,高龄起病、男性、吸烟、发热、呼吸困难、胸腔积液、高滴度的抗黑色素瘤分化相关基因5抗体、抗黑色素瘤分化相关基因5抗体IgG1亚型阳性、抗Ro-52抗体阳性、血清C反应蛋白、乳酸脱氢酶、肌酸激酶等炎症指标升高、血清涎液化糖链抗原-6等肺损伤标记物升高、血清铁蛋白等巨噬细胞活化标志物升高、外周血淋巴细胞计数减少、氧合指数减低、用力肺活量占预计值的百分比减低是抗黑色素瘤分化相关基因5抗体阳性皮肌炎患者预后不良的危险因素;而病程较长、出现关节症状的患者往往预后较好。此外,有学者基于预后因素构建了风险预测模型,但现有的模型较为局限,全面、可靠的风险预测模型还有待进一步开发和验证。目前,抗黑色素瘤分化相关基因5抗体阳性皮肌炎尚缺乏有效的治疗,对于死亡高危患者,早期使用基于大剂量糖皮质激素的三联疗法、Janus激酶抑制剂、利妥昔单抗、血浆置换和预防性使用复方磺胺甲噁唑/甲氧苄啶等治疗有望改善患者预后。

关键词：抗黑色素瘤分化相关基因5抗体皮肌炎预后因素

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新型电动哮喘辅助给药装置创新设计与实验研究

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机电产品开发与创新 2024年第3期37卷 41-44,56页

作者：桑凌峰张赏赏岑大卫陶靖李昱磊黄晓春宁波职业技术学院智能医疗养老护理技术研究所浙江宁波315800 浙江佑仁智能机器人有限公司浙江宁波315800

基于哮喘患者用药过程中手口协同难度高、药剂剩余次数不清晰等问题,设计了一款新型电动哮喘辅助给药装置。首先,提出了负压触发工作原理,对给药装置运动机构进行设计,并对关键构件电动推杆进行了计算和选型;其次,将给药装置分为主体结... 详细信息

基于哮喘患者用药过程中手口协同难度高、药剂剩余次数不清晰等问题,设计了一款新型电动哮喘辅助给药装置。首先,提出了负压触发工作原理,对给药装置运动机构进行设计,并对关键构件电动推杆进行了计算和选型;其次,将给药装置分为主体结构和药剂快装结构,并对其进行了详细的结构设计;之后,搭建了该装置的控制系统,对升压电路、降压电路以及电池容量进行了详细的设计和计算;最后,研制了该装置的物理样机,通过模糊评价法测试了该结构的操作便捷性,图像法对比法测试了给药装置的给药准确性,相机跟踪法测试了该装置的喷射时间,从实验效果来看,该装置的操作便捷性表现优秀,给药准确性达到了97.43%,喷射反应时间为0.85s,能够满足患者需求。

关键词：电动哮喘辅助给药装置负压触发结构设计控制系统设计

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