检索结果-南通市图书馆

Chinese Science Bulletin 1989年第10期34卷 846-851页

作者：孙海田葛朝华 Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing

The banded or laminated exhalative hydrothermal chemical tourmalinite and mineralized tourmaline-rich sedimentary rocks were recognised for the first time in the stratabound and stratiform copper deposits in ghongtiaoshan District in 1986, and further confirmed by the intensive investigations. The discovery can help better understand the geological environments and the origin of the stratabound and stratiform copper deposits.

关键词： the lower-middle Proterozoic stratabound and stratiform copper deposits banded tourmalinite.

Gas-solid Erosion on Bionic Configuration Surface

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 306-311页

作者：韩志武张俊秋 Key Laboratory of Bionics Engineering of Ministry of Education Jilin University

A three levels orthogonal table-L9（34） was used,namely,impact angle,rotating speed,erodent size,and surface configuration were *** three bionic surface configurations are pit,groove,and *** experimental results indicate the experiment factors affecting erosive rate are,in their sequence of contribution,erodent size,impact angle,configuration,and rotating speed;the erosive rate increased with increase in rotating speed,erodent size;the erosion resistance of the sample with ring structure is higher than that of the other two *** on this result,regression orthogonal experiment was carried out to select the optimal erosion resistance condition with respect to the ring bionic surface *** equations between erosive rate and experimental factors of ring surface configurations were obtained.

关键词： bionic configuration erosion experiment optimum design part of orthogonal polynomial regression

A hybrid machine learning optimization algorithm for multivariable pore pressure prediction

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Petroleum Science 2024年第1期21卷 535-550页

作者： Song Deng Hao-Yu Pan Hai-ge Wang Shou-Kun Xu Xiao-Peng Yan chao-Wei Li Ming-Guo Peng Hao-Ping Peng Lin Shi Meng Cui Fei Zhao School of Petroleum and Natural Gas Engineering Changzhou UniversityChangzhou213164JiangsuChina Tubular Goods Research Institute of CNPC Beijing102249China CNPC Engineering Technology R&D Company Limited Beijing102206China

Pore pressure is essential data in drilling design,and its accurate prediction is necessary to ensure drilling safety and improve drilling *** methods for predicting pore pressure are limited when forming particular structures and *** this paper,a machine learning algorithm and effective stress theorem are used to establish the transformation model between rock physical parameters and pore *** study collects data from three *** 1 had 881 data sets for model training,and Wells 2 and 3 had 538 and 464 data sets for model *** this paper,support vector machine(SVM),random forest(RF),extreme gradient boosting(XGB),and multilayer perceptron(MLP)are selected as the machine learning algorithms for pore pressure *** addition,this paper uses the grey wolf optimization(GWO)algorithm,particle swarm optimization(PSO)algorithm,sparrow search algorithm(SSA),and bat algorithm(BA)to establish a hybrid machine learning optimization algorithm,and proposes an improved grey wolf optimization(IGWO)*** IGWO-MLP model obtained the minimum root mean square error(RMSE)by using the 5-fold cross-validation method for the training *** the pore pressure data in Well 2 and Well 3,the coefficients of determination(R^(2))of SVM,RF,XGB,and MLP are 0.9930 and 0.9446,0.9943 and 0.9472,0.9945 and 0.9488,0.9949 and *** achieves optimal performance on both training and test data,and the MLP model shows a high degree of *** indicates that the IGWO-MLP is an excellent predictor of pore pressure and can be used to predict pore pressure.

关键词： Pore pressure Grey wolf optimization Multilayer perceptron Effective stress Machine learning

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体育公共服务财政保障存在的问题及对策

体育文化导刊 2019年第8期 38-42,71页

作者：赵静葛超西南科技大学体育学科部四川绵阳621010 绵阳师范学院体育与健康教育学院四川绵阳621000

采用文献资料法等,探讨现阶段我国体育公共服务财政保障存在的问题及原因,并提出对策。主要结论:目前我国体育公共服务财政保障存在着资金投入明显较少和投入非均等化等突出问题,产生这些问题的原因在于事权与财权配置不合理、体育公共... 详细信息

采用文献资料法等,探讨现阶段我国体育公共服务财政保障存在的问题及原因,并提出对策。主要结论:目前我国体育公共服务财政保障存在着资金投入明显较少和投入非均等化等突出问题,产生这些问题的原因在于事权与财权配置不合理、体育公共服务财政政策不健全和财政保障来源单一且监管不清。建议:理顺政府体育公共服务事权界限,实现体育事权、财权的规范化;建立税收体制及转移支付制度,推动公共体育服务均等化进程;动态调整体育事权财权配置,推进体育公共服务监管与绩效评价。

关键词：体育管理体育公共服务财政保障政府购买

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破片侵彻混凝土毁伤效应研究

北京理工大学学报 2023年第3期43卷 259-266页

作者：余庆波钟世威葛超北京理工大学爆炸科学与技术国家重点实验室北京100081

采用Autodyn动力学软件对大尺寸破片侵彻混凝土毁伤效应影响因素进行数值模拟研究,获得了侵彻速度、侵彻姿态、破片形状、破片材料等因素对混凝土毁伤效应影响特性.研究结果表明,破片侵彻速度增大,侵深和侵孔直径逐渐增大,且直径趋于一... 详细信息

采用Autodyn动力学软件对大尺寸破片侵彻混凝土毁伤效应影响因素进行数值模拟研究,获得了侵彻速度、侵彻姿态、破片形状、破片材料等因素对混凝土毁伤效应影响特性.研究结果表明,破片侵彻速度增大,侵深和侵孔直径逐渐增大,且直径趋于一定值;斜侵彻时,压缩–剪切耦合作用和边界效应可造成侵孔增大;当破片侵彻动能、形状相同时,钨破片综合毁伤效果优于4340钢、45#钢;圆柱体破片破孔能力最强,正方形破片侵深能力最强.

关键词：预制破片混凝土弹药战斗部数值模拟

Lipid metabolism is involved in the development of functional stomata in Arabidopsis

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Lipid metabolism is involved in the development of functiona...

2016年全国植物生物学大会

作者： Sheng-chao ge Tao Zhou Jing-Jing He Jirong Huang Yun-Kuan Liang State Key Laboratory of Hybrid Rice Department of Plant SciencesCollege of Life SciencesWuhan University State Key Laboratory of Plant Molecular genetics Institute of Plant Physiology and EcologyShanghaiInstitutes for Biological SciencesChinese Academy of Sciences

Stomata that are bordered by pairs of guard cells are specialized for regulating gas exchange and transpiration in plants. During the past decade immense progress has been made in understanding the early stages of guard cell differentiation,but the downstream development for functional stomatal guard cells remains poorly understood. Here we reported two Arabidopsis mutants,wizened stomata 1(wiz1-1) and wizened stomata 2(wiz2-1),which have 31% and 16% deformed stomata,respectively. These abnormal stomata bear a general resemblance to the flat tires of cars,and the sizes of wizened guard cells in wiz1-1 and wiz2-1 mutants are 85% and 75% of the wild type(WT) ones. Except for the stomatal shape and size,mutations in WIZ1 and WIZ2 did not affect the stomatal density and stomatal indices. In addition,stomatal conductance(g) induced by low [CO] and light illumination was significantly reduced in mutants. When tested with the light-and fusicoccin-induced stomatal opening bioassays,the deformed stomata of wiz1-1 and wiz2-1 showed nearly no aperture changes while the normal shaped stomata behaved comparably to those of WT in terms of stomatal movement. genetic analysis showed that these two mutants are not allelic. By tracing developmental process of deformed stomata in wiz1-1 and wiz2-1,we found that the morphological defects occurred after guard mother cells were divided to form young stomata,suggesting that both WIZ1 and WIZ2 regulate guard cell differentiation at the late stage. The development of the ventral wall of the wizened guard cells was disturbed,and large lipid drops(LD) accumulated in the wizened guard cells. These results imply that WIZs may play important roles in the development of fully functional stomata through modulating LD biogenesis in Arabidopsis thaliana. We are currently working on the fine gene mapping and dissecting the molecular mechanisms regulating the development of functional stomata by the WIZ genes.

关键词： environmental stress stomatal function guard cell lipid metabolism plant development

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弹丸头部对斜侵彻弹道偏转影响研究

兵工学报 2015年第2期36卷 255-262页

作者：葛超董永香陆志超冯顺山北京理工大学爆炸科学与技术国家重点实验室北京100081

通过对不同头部形状与组合材料的弹头对中厚钢靶的斜侵彻弹道对比研究,获得了尖卵形、截卵形与内凹截卵形,以及不同截卵位置、弹头长度和头部组合材料弹头对斜侵彻中弹道偏转的影响规律和侵彻过程中受到偏转力矩的变化规律。计算结果表... 详细信息

通过对不同头部形状与组合材料的弹头对中厚钢靶的斜侵彻弹道对比研究,获得了尖卵形、截卵形与内凹截卵形,以及不同截卵位置、弹头长度和头部组合材料弹头对斜侵彻中弹道偏转的影响规律和侵彻过程中受到偏转力矩的变化规律。计算结果表明:截卵形弹弹道偏离角小,抗弹道姿态劣化的能力强,侵彻弹道相对稳定性好;弹头前端复合高密度、高硬度钨合金材料的弹丸侵彻能力强,弹道偏离角小。基于弹道侵彻过程偏转力矩与偏转角的时空演化特点,获得斜侵彻弹道偏转关联性。通过正交试验得到了影响弹道偏离角由大到小的因素分别为:弹头形状、弹头材料和弹速。研究结果可为低速弹丸与金属靶的斜侵彻弹道分析和弹丸头部设计提供一定帮助。

关键词：兵器科学与技术斜侵彻弹头形状弹道偏转正交试验

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功能梯度材料性能宏观梯度函数反演分析

功能材料 2014年第B06期45卷 172-176页

作者：程红梅葛超峰高峰中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116 中国矿业大学力学与建筑工程学院江苏徐州221116

功能梯度材料具有复杂的细部结构,其内部构造远比匀质材料复杂。因此,以目前的实验条件,逐点测量功能梯度材料参数的宏观分布曲线是十分困难的。在利用有限体积法求解一维瞬态波传播理论的基础上,结合D.S.C算法构建了反演数学模型。并... 详细信息

功能梯度材料具有复杂的细部结构,其内部构造远比匀质材料复杂。因此,以目前的实验条件,逐点测量功能梯度材料参数的宏观分布曲线是十分困难的。在利用有限体积法求解一维瞬态波传播理论的基础上,结合D.S.C算法构建了反演数学模型。并通过算例分析在已知接收波的情况下,对功能梯度材料参数3种常用的宏观分布函数进行反演分析,并取得满意结果。显然,这可大大减少功能梯度材料的基本力学性能测试工作。

关键词：功能梯度材料宏观函数分布反演波有限体积法

何首乌多糖对免疫功能低下小鼠的免疫保护作用

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中国新药杂志 2007年第24期16卷 2040-2042页

作者：葛朝亮刘颖安徽医科大学第一附属医院药剂科合肥230022

目的:探讨何首乌多糖(PPM)对免疫功能低下小鼠的免疫保护作用。方法:小鼠腹腔注射环磷酰胺建立小鼠免疫功能低下模型后,灌胃PPM 0.4,0.8,1.6 ***-1,qd,连续给药10 d,另设模型对照组和正常对照组。采用显微镜观察腹腔巨噬细胞的吞噬百分... 详细信息

目的:探讨何首乌多糖(PPM)对免疫功能低下小鼠的免疫保护作用。方法:小鼠腹腔注射环磷酰胺建立小鼠免疫功能低下模型后,灌胃PPM 0.4,0.8,1.6 ***-1,qd,连续给药10 d,另设模型对照组和正常对照组。采用显微镜观察腹腔巨噬细胞的吞噬百分率、吞噬指数和T淋巴细胞酯酶阳性率;用分光光度测定血清溶血素含量;用3H-TdR掺入法测定脾细胞淋巴细胞增殖率。结果:PPM能显著拮抗环磷酰胺所致免疫功能低下小鼠的免疫器官重量减轻和白细胞数量减少,明显增加小鼠腹腔巨噬细胞的吞噬率及吞噬指数,显著增加血清溶血素含量,且能明显促进T淋巴细胞酯酶阳性率和ConA诱导的脾T淋巴细胞增殖反应。结论:何首乌多糖对免疫功能低小鼠的免疫功能有明显的增强作用。

关键词：何首乌多糖环磷酰胺免疫功能

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口红管中套自动模设计

模具工业 2008年第12期34卷 28-30页

作者：张朝阁浙江工业职业技术学院数字控制工程分院浙江绍兴312000

分析了口红管中套原生产工艺存在的不足———工序分散、模具数多、生产效率低及产品质量不稳定等,改进了原有冲压生产工艺,设计了1副全自动冲模,该模具具有生产效率高,性能稳定和节约原材料等特点,对同类产品模具设计具有一定的参考价值。

关键词：口红管中套变薄拉深模具