检索结果-南通市图书馆

Geotectonic Evolution and Metallogenesis in the Nujiang-Lancang-Jinsha Rivers Area, China

在线全文

学校读者我要写书评

暂无评论

Journal of Geological Resource and Engineering 2014年第3期2卷 139-150页

作者： zou Guangfu zou Xin Mao Ying Mao Qiong Xia Tong Chengdu Institute of Geology and MineralResources China Geological Survey Chengdu 610082 China Department of Psychology Peking University Beijing 100871 China Chengdu Comprehensive Rock and Mineral Testing Center Sichuan Bureau of Geology and Mineral Resources Chengdu 610081China Research Institute of Petroleum Exploration and Development North China Oil Field Company PetroChin Renqiu 062552China China Ocean Press Beijing 100081 China

The studied area lies in the eastern sector of the Tethys. Since the Early Paleozoic, the Nujiang-Lancang-Jinsha Rivers （southwest Sanjiang） area has experienced the geological evolutionary phase of the Paleo-Tethys, Meso-Tethys and Neo-Tethys. The multiple tectonic-magmatic activities have been occurred in the region, which have provided very favorable conditions. According to the regional geological characteristics, Geotectonic position is the area which can be divided into the following tectonic units： Kekexili-Yajiang passive continental margin, Garze-Litang plate junction, Dege-Zhongdian plate, Jinshajiang-Ailaoshan plate junction, Changdu-Simao plate, Lanchangjiang plate junction, Zuogong-Baoshan plate, Nujiang plate junction, Bomi-Tengchong plate and nine mineralization zones （Kekexili-Yajiang mineralization zone, Garze-Litang mineralization zone, Dege-Zhongdian mineralization zone, Jinshajiang-Ailaoshan mineralization zone, Changdu-Simao mineralization zone, Lanchangjiang mineralization zone, Zuogong-Baoshan mineralization zone, Nujiang mineralization zone and Bomi-Tengchong mineralization zone）. The authors discussed that the geotectonic evolution specializes are relative to the main mineralization in this region. These studies show the geotectonic evolution and mineralization in the Nujiang-Lancang-Jinsha Rivers area have gone through eight stages for the Cambrian. Because the tectonic-magmatic mineralization activities have occurred the rich minerals resources and ore deposit types have been forming in this region. Ore deposits may be divided into seven types： massive sulfide type, stratabound type, turbidite type, postmag-matic hydrothermal type, skarn type, porphyry type and ductile shear zone type gold deposit. Deep geological effect of southwest Sanjiang area for deposit and its mineralization and ore prospecting and metallogenic prediction research work, is expected to find new orebody and ore deposit. The study of geotonics and metallogenesis in the

关键词： Geotectonic evolution mineralization ore deposits the Nujiang-Lancang-Jinsha rivers area.

Clinical Study of Chronic Kidney Disease in Patients with Insulin Resistance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

器官移植内科学杂志 2011年第4期6卷 139-150页

作者： Guimian zou Hequn zou Weiguo Sui Jiejing Chen Can Huang Department of Nephrology Southern Medical University Affiliated Guilin Hospital (No. 181 Hospital of PLA.) Guilin 541002 China Department of Nephrology The Third Affiliated Hospital of SouthernMedical University. Guangzhou 510630 China

Griseofulvin enantiomers and bromine-containing griseofulvin derivatives with antifungal activity produced by the mangrove endophytic fungus Nigrospora ***1

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2024年第1期6卷 102-114页

作者： Ge zou Wencong Yang Tao Chen Zhaoming Liu Yan Chen Taobo Li Gulab Said Bing Sun Bo Wang Zhigang She School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and ApplicationInstitute of MicrobiologyGuangdong Academy of SciencesGuangzhou 510070China School of Pharmacy Anhui Medical UniversityHefei 230032China Department of Chemistry Women University SwabiSwabi 23430Pakistan

Marine microorganisms have long been recognized as potential sources for drug *** was one of the first antifungal natural products and has been used as an antifungal agent for *** this study,12 new griseofulvin derivatives[(±)-1-2,(+)-3,(±)-4,10-12,and 14-15]and two new griseofulvin natural products(9 and 16)together with six known analogues[(-)-3,5-8,and 13]were isolated from the mangrove-derived fungus Nigrospora ***1 treated with 0.3%NaCl or 2%NaBr in rice solid *** 2D structures and absolute configurations were established by extensive spectroscopic analysis(1D and 2D NMR,HRESIMS),ECD spectra,computational calculation,DP4+analysis,and X-ray single-crystal *** 1-4 represent the first griseofulvin enantiomers with four absolute configurations(2S,6'S;2R,6'R;2S,6'R;2R,6'S),and compounds 9-12 represent the first successful production of brominated griseofulvin derivatives from fungi via the addition of NaBr to the culture *** the antifungal assays,compounds 6 and 9 demonstrated significant inhibitory activities against the fungi Colletotrichum truncatum,Microsporum gypseum,and Trichophyton mentagrophyte with inhibition zones varying between 28 and 41 mm(10μg/disc).The structure-activity relationship(SAR)was analyzed,which showed that substituents at C-6,C-7,C-6'and the positions of the carbonyl and double bond of griseofulvin derivatives significantly affected the antifungal activity.

关键词： Mangrove endophytic fungus Nigrospora sp. Griseofulvin Antifungal activity

Characterization of neutral lipases revealed the tissue-specific triacylglyceroi hydrolytic activity in Nilaparvata lugens

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2023年第3期30卷 693-704页

作者： Hui-Hui Zhang Bao-Jun Yang Yong Wu Hao-Li Gao Xu-Min Lin jian-Zheng zou Ze-Wen Liu Key Laboratory of Integrated Management of Crop Diseases and Pests(Ministry of Education) College of Plant ProtectionNanjing Agricultural UniversityNanjingChina Rice Technology Research and Development Center China National Rice Research InstituteHangzhouChina

The lipid metabolism plays an essential role in the development andreproduction of insects, and lipases are important enzymes in lipid metabolism. In Nilaparvatalugens, an important insect pest on rice, triacylglycerol hydrolytic activities weredifferent among tissues, with high activity in integument, ovary, and fat body, but low activityin intestine. To figure out the tissue-specific triacylglycerol hydrolytic activity, weidentified 43 lipases in N. lugens. Of these 43 lipases, 23 belonged to neutral lipases, sothis group was selected to perform further experiments on triacylglycerol hydrolysis. Thecomplete motifs of catalytic triads, β9 loop, and lid motif, are required for the triacylglycerolhydrolytic activity in neutral lipases, which were found in some neutral lipases withhigh gene expression levels in integument and ovary, but not in intestine. The recombinantproteins of 3 neutral lipases with or without 3 complete motifs were obtained, and the activitydetermination confirmed the importance of 3 motifs. Silencing XM_022331066.1,which is highly expressed in ovary and with 3 complete motifs, significantly decreasedthe egg production and hatchability of N. lugens, partially through decline of the lipidmetabolism. In summary, at least one-third of important motifs were incomplete in allneutral lipases with high gene expression in intestine, which could partially explain whythe lipase activity in intestine was much lower than that in other tissues. The low activityto hydrolyze triacylglycerol in N. lugens intestine might be associated with its food resourceand nutrient components, and the ovary-specific neutral lipases were important forN. lugens reproduction.

关键词： lipases neutral lipases Nilaparvata lugens reproduction triacylglycerol hydrolytic activity

PEM:a lightweight program memory encryption mechanism for embedded processor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2010年第1期17卷 77-84页

作者： HUO Wen-jie,LIU Zheng-lin,zou Xue-cheng Department of Electronics of Science and Technology,Huazhong University of Science and Technology,Wuhan 430074,China Department of Electronics of Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Application of embedded systems is faced with multiple threats against security. To solve this problem, this article proposes a new program memory encryption mechanism （PEM） to enhance the security of embedded processor. The new mechanism encrypts all the programs via a secure cache structure. It not only caches the instructions read from the off-chip memory, but also stores the pad values used to encrypt the plaintext. It effectively accelerates encryption and reduces the performance overhead. Besides the encryption, PEM also monitors the program modifications and reset behaviors to reduce the risk of vicious tamper. The experiment indicates that PEM has an average of 2.3 % performance improvement and results in a 25.71% power reduction in the write-back stage. The new scheme offers a good balance between performance and security. It is fully practicable for embedded processor.

关键词： embedded processor memory encryption advanced encryption standard (AES) secure cache hardware protection

卷积神经网络在卫星遥感海冰图像分类中的应用探究——以渤海海冰为例

在线全文

学校读者我要写书评

暂无评论

海洋学报 2020年第9期42卷 100-109页

作者：崔艳荣邹斌韩震石立坚刘森上海海洋大学海洋科学学院上海201306 国家卫星海洋应用中心北京100081 国家海洋局空间海洋遥感与应用研究重点实验室北京100081

本文以TensorFlow为框架搭建卷积神经网络,基于迁移学习的思想,以经典的手写数字识别作为引入,对不同代价函数和激活函数组合对卷积神经网络模型分类结果影响进行了评价分析。以HJ-1A/B渤海海冰图像为实验数据源,分析了不同函数组合对... 详细信息

本文以TensorFlow为框架搭建卷积神经网络,基于迁移学习的思想,以经典的手写数字识别作为引入,对不同代价函数和激活函数组合对卷积神经网络模型分类结果影响进行了评价分析。以HJ-1A/B渤海海冰图像为实验数据源,分析了不同函数组合对遥感海冰图像分类的影响,优选出交叉熵代价函数与ReLU激活函数为最佳的组合,证明了卷积神经网络在遥感海冰分类中的应用可行性。对渤海海冰图像分类结果进行验证,其中带标签样本验证精度为98.4%。使用该模型对无标签的测试样本进行识别,讨论了样本的窗口尺寸对海冰分类结果的影响,发现在400×400小范围分类实验中最佳窗口尺寸为2×2;最后对整个渤海海域进行识别验证,效果较好。

关键词：卷积神经网络海冰分类代价函数激活函数 TensorBoard

基于改进U-Net++和近红外光谱技术的羊毛含量快速定性分析方法研究

在线全文

学校读者我要写书评

暂无评论

光谱学与光谱分析 2023年第1期43卷 303-309页

作者：冷思雨乔嘉慧王连庆王军邹亮中国矿业大学地下空间智能控制教育部工程研究中心江苏徐州221116 中国矿业大学信息与控制工程学院江苏徐州221116 徐州兆恒工控科技有限公司江苏徐州221008

羊毛制品因其柔软、保暖性好等优点广受欢迎,羊毛含量是衡量这类产品质量的重要依据。目前市场上羊毛制品质量参差不齐,传统检测方法具有破坏性大、主观性强等缺点,已无法满足实时快速评估目标羊毛制品质量情况的需求。近红外光谱技术... 详细信息

羊毛制品因其柔软、保暖性好等优点广受欢迎,羊毛含量是衡量这类产品质量的重要依据。目前市场上羊毛制品质量参差不齐,传统检测方法具有破坏性大、主观性强等缺点,已无法满足实时快速评估目标羊毛制品质量情况的需求。近红外光谱技术是一种无需破坏样品结构、可模型封装操作的快速测量方法。将近红外光谱技术和深度学习技术融合,提出了一种基于注意力机制和U-Net++网络的羊毛含量快速定性分析方法。在数据准备方面,使用手持便携式光谱仪采集羊毛制品样本的光谱数据,其波段范围为908.1~1676.2 nm,并根据其含量的不同对原始样本进行了等级划分。为减少光谱采集方式对建模数据集的影响,针对同一样本在距探头5,6,8,9和19 mm 5种高度,分别采集了5次光谱数据,并使用马氏距离法剔除异常样本,最终共5125组光谱数据用于建模。在模型选择方面,U-Net++网络可通过下采样、跳跃连接和上采样等环节实现对光谱数据的特征提取,并进一步对样本进行分类预测。然而,该网络使用了大量密集的跳跃连接,易产生模型参数冗余、低层特征被重复使用等问题。鉴于此,在原始网络的基础上引入了注意力门控模块,可以更有效地提取特征信息,提高预测精度。建模过程中,将羊毛制品样本90%的光谱数据用于训练和验证,10%的数据用于测试。实验结果表明,基于U-Net++网络的预测模型在独立测试集上的准确率为93.59%,召回率为93.53%,精确率为94.24%,其性能超过了多种传统分类模型。同时,与U-Net,Attention U-Net等其他U-Net系列网络模型相比,所提出的分类模型的各项评价指标也高于上述网络模型,验证了跳跃连接和注意力门控模块的效果。基于近红外光谱技术,构建了Attention U-Net++模型,为羊毛含量快速无损检测提供了一种新思路,具有一定的理论和实际意义。

关键词：近红外光谱深度学习羊毛制品 U-Net++

Genetic Dissection of Net Effects Between Yield and Its Components in Sea Island Cotton (Gossypium barbadense L.)

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2008年第9期7卷 1052-1060页

作者： YE Zi-hong MEI Yong-jun zou Ke-qin FU Xian-shu jiaNG Lin-shu College of Life Sciences China Jiliang University Hangzhou 310018 P.R.China College of Plant Science and Technology Tarim University Alar 843300 P.R.China Department of Animal Science and Technology Beijing University of Agriculture Beijing 102206 P.R.China

The number of bolls, individual boll weight, and lint percentage are three important yield components of lint yield of cotton. In the present study, nine parents, twenty F1, and twenty F2 crosses of intraspecific hybrids of sea island cotton （Gossypium barbadense L.） were grown at Tarim University, Alar, Xinjiang, China, in 2000 and 2001. Lint yield and its three component traits were measured and analyzed by an extended conditional mixed linear model approach. Lint percentage made the largest contribution to additive, additive x environment, and dominance x environment variations for lint yield. The contribution ratios of number of bolls, individual boll weight, and combined contribution of these two traits to additive x environment and dominance x environment variations for lint yield were not statistically significant. Lint yield of different parents could be affected differently by lint percentage. Lint yield of some parents was closely correlated with lint percentage, whereas for other parents, the behavior of individual boll weight and number of bolls played much more important roles on lint yield than that of lint percentage. It was shown by the conditional and conventional predicted additive x environment interaction effects of parents that the environment condition could influence different parents with varied effects.

关键词： yield yield components Gossypium barbadense L. conditional analysis

Benefit of Employees and Motivation for Earnings Manipulation—— A Case Study of Employee Shares

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Accounting and Auditing 2005年第5期1卷 49-53,65页

作者： Veicheng Yu Haifeng zou Tsinghua University

The employee shares of Guilin Jiqi became tradable in stock exchanges from June 2000. The firm coincidently made up her profit disclosed in the semi-annual report. After ruling out other explanations, we find that the fraud of Guilin Jiqi seems to be intended to help her employees （not including top managers） to reap profits at the expense of misled investors. Our findings offer a potential insight into relating employee shares to insider selling.

关键词： employee shares accounting fraud benefit of employees insider selling