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The O and H isotope characteristics of water from major rivers in China

Chinese Journal Of Geochemistry 2015年第1期34卷 28-37页

作者： Si-Liang Li Fu-jun yue Cong-Qiang Liu Hu Ding Zhi-Qi Zhao Xiaodong Li The State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences

Isotopic compositions of the water sources and evapotranspiration in large rivers of China are not well explored. In this investigation, d18 O and dD values of water from major large rivers of China are integrated to understand the spatial and temporal variations in the isotopes of water and d-excess. River water samples were collected from the channels and tributaries of the Changjiang, Yellow, Songhua and Liao Rivers in China. Water from upstream was generally enriched with light isotopes relative to that from downstream areas. Water from the Songhua River and upper reach of the Changjiang River has relatively negative isotopic values impacted by latitude and altitude effects, respectively. The spatial pattern showed that d18O-H2 O values in rivers mainly ranged from-9 to-7 % in most of China based on roughly mapped contours, and rivers enriched in light isotopes were primarily located in the Tibetan Plateau and northeast China The slopes of linear regression from the Yellow and Liao Rivers suggested that the loss of water by direct evaporation shifted the isotopes of water, especially in some small tributaries. Additionally, there was a narrow range of low d18OH2 O values from the main channel of rivers during the lowflow season relative to the high-flow season due to influence of the monsoon climate. No distinct spatial variation of d-excess values was found in the rivers of China. However, water samples in some rivers with low d-excess values had high d18 O values, indicating that evaporation in the tributaries has led to significant water loss, especially in tributaries of the Yellow and Liao Rivers.

关键词：中国东北地区同位素特征河流水源长江上游蒸发损失同位素组成时空变化

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Modern research thoughts and methods on bio-active components of TCM formulae

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Chinese Journal of Natural Medicines 2022年第7期20卷 481-493页

作者： TANG Yu-Ping XU Ding-Qiao yue Shi-jun CHEN Yan-Yan FU Rui-Jia BAI Xue Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility State Key Laboratory of Research&Development of Characteristic Qin Medicine Resources(Cultivation)Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drug ResearchShaanxi Collaborative Innovation Center of Chinese Medicinal Resource IndustrializationShaanxi University of Chinese MedicineXi’an 712046China

TCM formulae are the important guidances for clinical application of traditional Chinese medicines,which follow the principles of diagnosis and treatment in *** the bio-active components of TCM formulae is the key to the modernization and internationalization of traditional Chinese *** the rapid development of modern instruments and technology,many new theories,methods and strategies are emerging,which upgrade the research of TCM formulae into a higher *** when the medicinal efficacy,bio-active components,function mechanism of TCM formulae are understood,we can guarantee TCM safety and quality *** this paper,we summarized the latest modern research thoughts and methods on bio-active components of TCM formulae including formula decomposition study,serum pharmacology and serum pharmacochemistry,association analysis,biochro-matography,network pharmacology,metabolomics and proteomics,so as to provide reference for the research and development of TCM in the future.

关键词： Chinese medicine TCM formulae Bio-active component Morden research methods

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Double regularization control based on level set evolution for tablet packaging image segmentation

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Advances in Manufacturing 2015年第1期3卷 73-83页

作者： Li Liu Ao-Lei Yang Xiao-Wei Tu Wen-Ju Zhou Min-Rui Fei jun yue Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and AutomationShanghai University School of Information Science and Electrical Engineering Ludong University School of Computer Science and Electronic Engineering University of Essex.Colchester CO4 3SQUK

This paper proposes a novel double regular- ization control （DRC） method which is used for tablet packaging image segmentation. Since the intensities of tablet packaging images are inhomogenous, it is difficult to make image segmentation. Compared to methods based on level set, the proposed DRC method has some advantages for tablet packaging image segmentation. The local re- gional control term and the rectangle initialization contour are first employed in this method to quickly segment un- even grayscale images and accelerate the curve evolution rate. Gaussian filter operator and the convolution calcula- tion are then adopted to remove the effects of texture noises in image segmentation. The developed penalty energy function, as regularization term, increases the constrained conditions based on the gradient flow conditions. Since the potential function is embedded into the level set of evo- lution equations and the image contour evolutions are bi- laterally extended, the proposed method further improves the accuracy of image contours. Experimental studies show that the DRC method greatly improves the computational efficiency and numerical accuracy, and achieves better results for image contour segmentation compared to other level set methods.

关键词： Tablet packaging image . Level setevolution - Image segmentation - Curvatures . Doubleregularization control (DRC)

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An enhanced method for estimating snow water equivalent in the central part of the Tibetan Plateau using raster segmentation and eigenvector spatial filtering regression model

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Journal of Mountain Science 2022年第9期19卷 2570-2586页

作者： CHENG Qi-shan CHEN Yu-min YANG Jia-xin CHEN yue-jun XIONG Zhe-xin ZHOU An-nan School of Resource and Environment Science Wuhan UniversityWuhan 430079China Guangzhou Urban Planning&Design Survey Research Institute Guangzhou 510060China

Snow water equivalent(SWE)is an important factor reflecting the variability of *** is important to estimate SWE based on remote sensing data while taking spatial autocorrelation into *** on the segmentation method,the relationship between SWE and environmental factors in the central part of the Tibetan Plateau was explored using the eigenvector spatial filtering(ESF)regression model,and the influence of different factors on the SWE was *** sizes of 16×16,24×24 and 32×32 were selected to segment raster datasets into *** eigenvectors of the spatial adjacency matrix of the segmented size were selected to be added into the model as spatial factors,and the ESF regression model was constructed for each block in *** show that precipitation has a great influence on SWE,while surface temperature and NDVI have little *** temperature,elevation and surface temperature have completely different effects in different *** with the ordinary least square(OLS)linear regression model,geographically weighted regression(GWR)model,spatial lag model(SLM)and spatial error model(SEM),ESF model can eliminate spatial autocorrelation with the highest *** the segmentation size increases,the complexity of ESF model increases,but the accuracy is improved.

关键词： Snow water equivalent Tibetan Plateau Raster segmentation Parallel eigenvector spatial filtering

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就地NaI谱仪对面源的刻度研究

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价值工程 2024年第14期43卷 112-114页

作者：严亦泽宋卫杰陈凌李玥珺中国原子能科学研究院北京102413

核事故应急时,亟需快速确定放射性污染核素种类、污染程度和范围。由于核事故条件下地表沉降的放射性核素近似均匀面源分布,因此问题简化为快速、准确地获取均匀面源的活度浓度。对一台就地碘化钠谱仪建立了蒙特卡罗模型,得到距离地面1... 详细信息

核事故应急时,亟需快速确定放射性污染核素种类、污染程度和范围。由于核事故条件下地表沉降的放射性核素近似均匀面源分布,因此问题简化为快速、准确地获取均匀面源的活度浓度。对一台就地碘化钠谱仪建立了蒙特卡罗模型,得到距离地面1m处的谱仪对不同位置点源的探测效率,并通过积分的方式,计算得到谱仪对面源的探测效率。最后建立实验系统,通过实验验证就地碘化钠谱仪数值模拟模型的准确性以及刻度方法的合理性。结果表明,模拟与实验的探测效率偏差在12%以内,通过该刻度方法获得碘化钠谱仪的探测效率可靠。

关键词：就地碘化钠谱仪面源探测效率应急监测蒙特卡罗模拟

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Adaptive Fuzzy Dynamic Surface Control for a Class of Perturbed Nonlinear Time-varying Delay Systems with Unknown Dead-zone

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International Journal of Automation and computing 2012年第5期9卷 545-554页

作者： Hong-Yun yue jun-Min Li Department of Applied Mathematics,Xidian University,Xi an 710071,China 1. Department of Applied Mathematics Xidian University Xi’an 710071 China

In this paper,adaptive dynamic surface control(DSC) is developed for a class of nonlinear systems with unknown discrete and distributed time-varying delays and unknown *** logic systems are used to approximate the unknown nonlinear ***,by combining the backstepping technique and the appropriate Lyapunov-Krasovskii functionals with the dynamic surface control approach,the adaptive fuzzy tracking controller is *** development is able to eliminate the problem of 'explosion of complexity' inherent in the existing backstepping-based *** main advantages of our approach include:1) for the n-th-order nonlinear systems,only one parameter needs to be adjusted online in the controller design procedure,which reduces the computation burden ***,the input of the dead-zone with only one adjusted parameter is much simpler than the ones in the existing results;2) the proposed control scheme does not need to know the time delays and their upper *** is proven that the proposed design method is able to guarantee that all the signals in the closed-loop system are bounded and the tracking error is smaller than a prescribed error bound,Finally,simulation results demonstrate the effectiveness of the proposed approach.

关键词： Adaptive fuzzy control dynamic surface control(DSC) discrete and distributed time-varying delays Lyapunov-Krasovskii functionals dead-zone

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基于Efficient-YOLO的轻量化轴承缺陷检测

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计算机系统应用 2024年第2期33卷 265-275页

作者：娄瑶迪岳俊峰周迪斌刘文浩杭州师范大学信息科学与技术学院杭州311121

针对现有深度模型在工业轴承外观缺陷检测领域,存在模型参数量大、特征融合不充分以及对小目标检测精度低等问题,提出了一种轻量化自适应特征融合检测网络(Efficient-YOLO).首先,该网络采用嵌入CBAM注意力机制的EfficientNetV2结构进行... 详细信息

针对现有深度模型在工业轴承外观缺陷检测领域,存在模型参数量大、特征融合不充分以及对小目标检测精度低等问题,提出了一种轻量化自适应特征融合检测网络(Efficient-YOLO).首先,该网络采用嵌入CBAM注意力机制的EfficientNetV2结构进行基本特征提取,便于确保模型精度同时显著优化模型参数量;其次,设计了一种自适应特征融合网络(CBAM-BiFPN),用来增加网络对有效特征信息的提取;接着,在下游特征融合网络引入Swin Transformer机制,同时配合上游网络引入的Ghost卷积,大幅度提高模型对轴承外观缺陷的全局感知能力;最后,在推理阶段运用改进的非极大值抑制方法(Soft-CIoU-NMS),加入距离有关的权重评价因素,减少了重叠框的漏检.实验结果表明:与现有主流检测模型相比,此方法在轴承表面缺陷数据集上,mAP达到了90.1%,参数量降低至1.99M,计算量为7 GFLOPs,对轴承缺陷小目标识别率显著提升,满足工业现场轴承外观缺陷检测需求.

关键词：轴承缺陷检测深度学习 EfficientNetV2 YOLOv5 特征融合

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鸡毒支原体P31蛋白原核表达及膜定位鉴定

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中国动物传染病学报 2024年第4期32卷 85-90页

作者：李梅杨美岳筠王柏林宋春朱二鹏单春兰文明程振涛贵州大学动物科学学院贵阳550025 贵州省动物疫病与兽医公共卫生重点实验室贵阳550025 贵州省动物疫病预防控制中心贵阳550008

为筛选鸡毒支原体(MG)膜蛋白,利用生物信息学软件对其进行序列分析后,选择不含跨膜区的714 bp基因片段作为靶标蛋白进行原核表达(因其分子量约31 kDa,故而命名为P31蛋白),表达P31蛋白并进行纯化后制备兔多克隆抗体,运用ELISA方法检测抗... 详细信息

为筛选鸡毒支原体(MG)膜蛋白,利用生物信息学软件对其进行序列分析后,选择不含跨膜区的714 bp基因片段作为靶标蛋白进行原核表达(因其分子量约31 kDa,故而命名为P31蛋白),表达P31蛋白并进行纯化后制备兔多克隆抗体,运用ELISA方法检测抗体效价,提取MG液体培养物总蛋白、胞浆蛋白、膜蛋白,利用Western blot进行亚细胞定位。结果显示,P31蛋白具有跨膜结构和良好的B细胞抗原表位,原核表达后获取融合蛋白rP31,大小约为31 kDa,ELISA检测兔血清效价为1∶25600,Western blot分析显示,rP31蛋白分布在MG膜表面。本研究证实了P31蛋白确为MG膜蛋白且抗原性良好,可做为研发MG新型诊断方法、基因工程疫苗及治疗药物的候选蛋白。

关键词：鸡毒支原体 P31蛋白原核表达膜定位

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Mechanical properties and microstructure of Mg-treated and Catreated industrial H13 steel after quenching and tempering

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Journal of Iron and Steel Research International 2024年第8期31卷 1987-2001页

作者： jun-ying yue Dong Hou De-yong Wang Tian-peng Qu Xiang-long Li jun Tian School of Iron and Steel Soochow UniversitySuzhou 215021JiangsuChina

The effect of magnesium treatment and calcium treatment on the microstructure and mechanical properties of industrial H13 steel after quenching and tempering was *** impact toughness and tensile tests were mainly carried out,and the microstructure was observed by scanning electron microscopy,electron backscattered diffraction,and X-ray *** results show that magnesium treatment is still feasible in industrial *** is mainly manifested in the refinement of lath martensite and *** with calcium treatment,the prior austenite grains and carbides size of industrial H13 steel treated with magnesium decreased by 3.17μm after *** quenching and tempering,the carbides(especially V-rich carbides)in Mg treatment obviously spheroidized and distributed uniformly and increased in quantity *** lath martensite size is reduced from 2.45 to 2.31μ*** suggests that magnesium treatment was able to yield smaller grains and more evenly distributed ***,the impact toughness,yield strength,and ultimate tensile strength of industrial H13 steel with magnesium treatment increased by 28%,65.5 MPa and 123.7 MPa,*** increment of strength mainly comes from dislocation strengthening,grain refinement strengthening,and precipitation strengthening,among which precipitation strengthening accounts for the largest proportion.

关键词： Industrial H13 steel Mg treatment Heat treatment Carbide-Mechanical property

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学习贯彻习近平总书记在中共中央政治局第十四次集体学习时的重要讲话精神笔谈(三)

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中国大学生就业 2024年第8期 3-20页

作者：文虎张继旺岳昌君黄敬宝刘铸黑龙江省委教育工委黑龙江省教育厅北京中医药大学党委北京大学教育经济研究所中国社会科学院大学经济学院高校毕业生就业协会

近日,中共中央政治局就促进高质量充分就业进行第十四次集体学习。习近平总书记在主持集体学习时强调,促进高质量充分就业,是新时代新征程就业工作的新定位、新使命。要加快建构中国就业理论体系,有效提升我国在就业领域的国际话语权和... 详细信息

近日,中共中央政治局就促进高质量充分就业进行第十四次集体学习。习近平总书记在主持集体学习时强调,促进高质量充分就业,是新时代新征程就业工作的新定位、新使命。要加快建构中国就业理论体系,有效提升我国在就业领域的国际话语权和影响力。为深入学习领会习近平总书记重要讲话精神,本刊特组织“学习贯彻习近平总书记在中共中央政治局第十四次集体学习时的重要讲话精神”系列笔谈,邀约有关教育行政部门领导、高校领导、专家学者撰文,助力深度研究阐释习近平总书记关于促进高质量充分就业的重要讲话精神,加快推动建构中国大学生就业理论体系。

关键词：高校毕业生高质量充分就业中国就业理论体系

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