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Progress in Natural Science:Materials International 2021年第2期31卷 310-318页

作者： Haishui ren Xinyu ren Weimin Long Bo Chen shujie Pang Huaping Xiong Welding and Plastic Forming Division Beijing Institute of Aeronautical Materials State Key Laboratory of Advanced Brazing Filler Metals and Technology Zhengzhou Research Institute of Mechanical Engineering Department of Material Science and Engineering Beihang University

Dissimilar brazing of Ti2AlNb-based alloy and Ni-based wrought superalloy(GH536) was studied using NiCrFeSiB filler metal. The Ti2AlNb/GH536 joints were analyzed by scanning electron microscope(SEM) equipped with an electron probe micro-analyzer(EPMA), X-ray diffraction(XRD) and transmission electron microscopy(TEM). The formation mechanism of interfacial microstructure and mechanical properties of Ti2AlNb/GH536 joints were studied. The results indicated that Ti2Ni(Al,Nb), AlNi2Ti and TiB2reaction layers were formed in the joint adjacent to Ti2AlNb base metal. These layers resulted in high micro-hardness and the weak link of the joint. γ solid solution was formed through isothermal solidification and β1-Ni3Si phase precipitated in the γ solid solution during cooling process. Ni3B, β1-Ni3Si and CrB phases appeared in the centre of the joint. Blocky and needle-like borides formed within the diffusion affected zone of GH536 base alloy. The maximum tensile strength of Ti2AlNb/GH536 joints reached 425 MPa at room temperature and the strength value of 373 MPa was maintained at 923 K.

关键词： Ti2AlNb alloy Ni-based superally Brazing Microstructure Mechanical properties

水利文化传承与发展的轨迹——基于1980—2012年水利志的分析

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中国水利 2012年第18期 61-64页

作者：张伟兵王冠华任书杰李江华中国水利水电科学研究院北京100038 北京中水科信息技术有限公司北京100038 中国水利水电出版社北京100038

水利志是传承水利文化,弘扬和发展水利文化的重要载体。基于网络公共信息资源和传统文献资源,对新中国编修的水利志进行了全面系统的梳理。在此基础上,采用文献计量学的研究手段,对30余年来水利志发展历程、特点和原因进行了分析,从一... 详细信息

水利志是传承水利文化,弘扬和发展水利文化的重要载体。基于网络公共信息资源和传统文献资源,对新中国编修的水利志进行了全面系统的梳理。在此基础上,采用文献计量学的研究手段,对30余年来水利志发展历程、特点和原因进行了分析,从一个侧面描述了水利文化传承和发展的轨迹。

关键词：水利志水利文化文献计量学轨迹

散粮装卸两用机喂料系统故障的综合分析与解决方法

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现代食品 2023年第20期29卷 5-8,21页

作者：邱金钰王帅国王康兴任书杰赵征徐子锋连云港东粮码头有限公司江苏连云港222000

本文从设备总体结构、具体故障原因和解决方法等角度,阐述了散粮装卸两用机喂料系统发生故障的可能原因与解决方法,以供参考。

关键词：顺序控制设备粮食机械散粮系统港口机械故障诊断改进措施

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高速再入发汗热防护效果计算与试验研究

载人航天 2019年第3期25卷 324-331页

作者：逯雪铃孟希慧任淑杰张庆兵张博姚军郭瑾黄海明彭锦龙周凯北京电子工程总体研究所北京100854 北京交通大学土木建筑工程学院北京100044 中国航天空气动力技术研究院北京100074

针对强制发汗热防护用于高速再入飞行器抵抗气动加热引起的物面烧蚀的效果和可行性问题开展计算与试验研究。计算采用粘性高温多组分反应气体分析方法考虑来流空气与发汗介质的相互作用及组分反应。结果表明,在10m/s发汗速率条件下,发... 详细信息

针对强制发汗热防护用于高速再入飞行器抵抗气动加热引起的物面烧蚀的效果和可行性问题开展计算与试验研究。计算采用粘性高温多组分反应气体分析方法考虑来流空气与发汗介质的相互作用及组分反应。结果表明,在10m/s发汗速率条件下,发汗物面热流密度已经降低了75%,在20m/s发汗速率条件下则已经降低了99%。根据计算结果制备满足渗透率参数的发汗材料并完成发汗装置设计和防热效果电弧风洞试验验证。结果表明,发汗物面温升不足100K。理论计算与地面试验验证表明,针对高速再入条件,发汗主动热防护可有效降低物面气动加热,可作为高速再入航天器防热备选方案。

关键词：高速再入主动热防护高温反应电弧风洞验证

散粮装卸两用机波纹挡边皮带更换工艺方法改进及应用

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现代食品 2023年第20期29卷 11-15页

作者：任书杰李明华戴亚茆长扬徐子锋王帅国连云港东粮码头有限公司江苏连云港222000

本文列举了散粮装卸两用机波纹挡边皮带常见的损坏现象与损坏原因,阐述了一种新的散粮装卸两用机波纹挡边皮带更换工艺方法,旨在节约时间和人工成本。

关键词：粮食机械工艺改进波纹挡边皮带散粮装卸两用机

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川芎的栽培与药理研究

农业科技与装备 2009年第6期 82-84页

作者：郝淑娟任树杰田洋张振学彭剠王金辉沈阳化工学院化学工程学院沈阳110142 沈阳药科大学中药学院沈阳110016

川芎因其具有独特的药用价值而成为天然药物化学研究的重点。介绍川芎栽培过程中的选地、选苗要求,以及施肥、除草、补苗、防治病虫害、采收、加工等田间管理技术,采用显微鉴定和化学鉴定两种方法进行中药鉴定,分析川芎的化学成分及其... 详细信息

川芎因其具有独特的药用价值而成为天然药物化学研究的重点。介绍川芎栽培过程中的选地、选苗要求,以及施肥、除草、补苗、防治病虫害、采收、加工等田间管理技术,采用显微鉴定和化学鉴定两种方法进行中药鉴定,分析川芎的化学成分及其在中枢神经系统、血液系统、心血管系统的药理作用,为进一步开发利用川芎提供基础信息。

关键词：川芎栽培药理

GACP:graph neural networks with ARMA flters and a parallel CNN for hyperspectral image classification

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International Journal of Digital Earth 2023年第1期16卷 1770-1800页

作者： Jing Yang Jie Sun Yaping ren Shaobo Li shujie Ding Jianjun Hu School of Mechanical Engineering Guizhou UniversityGuiyangPeople’s Republic of China State Key Laboratory of Public Big Data Guizhou UniversityGuiyangPeople’s Republic of China School of Intelligent Systems Science and Engineering Jinan UniversityZhuhaiPeople’s Republic of China Department of Computer Science and Engineering University of South CarolinaColumbiaSCUSA

In recent years,the use of convolutional neural networks(CNNs)and graph neural networks(GNNs)to identify hyperspectral images(HSIs)has achieved excellent results,and such methods are widely used in agricultural remote sensing,geological exploration,and marine remote *** many generalization classification algorithms are designed for the purpose of learning a small number of samples,there is often a problem of a low utilization rate of position information in the empty spectral *** on this,a GNN with an autoregressive moving average(ARMA)-based smoothingfilter samples the node information in the null spectral domain and then captures the spatial information at the pixel level via spatial feature convolution;then,the null spectral domain position information lost by the CNN is located by a coordinate attention(CA)***,autoregressive,spatial convolution,and CA mechanisms are combined into multiscale features to enhance the learning capacity of the network for tiny *** conducted on the widely used Indian Pines(IP)dataset,the Botswana(BS)dataset,Houton 2013(H2013),and the WHU-Hi-HongHu(WHU)benchmark HSI dataset demonstrate that the proposed GACP technique can perform classification work with good accuracy even with a small number of training examples.

关键词： Graph neural networks word convolutional neural networks hyperspectral image classification attention mechanisms

Development and application of wellbore heat transfer model considering variable mass flow

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Underground Space 2021年第3期6卷 316-328页

作者： Jiangshuai Wang Jun Li Gonghui Liu shujie Liu Meipeng ren Kuidong Luo Shanxun Tao School of Petroleum Engineering Changzhou UniversityChina College of Petroleum Engineering China University of Petroleum(Beijing)China College of Petroleum China University of Petroleum(Beijing)at KaramayChina CNOOC Research Institute Co. Ltd.China

Dual-gradient drilling technology is being increasingly used in formations with narrow pressure *** dual-gradient drilling based on downhole separation,hollow spheres are separated into the annulus at the separator position,resulting in variable mass flow in the ***,existing heat transfer models are no longer suitable for describing wellbore temperature profiles in dual-gradient *** study focused on developing a wellbore heat transfer model that fully considers separated hollow spheres entering the annulus,complex casing programs,and heat sources,for dual-gradient drilling based on downhole *** model was solved using an iterative ***,the accuracy of the model was verified using temperature data measured from two ***,the difference in the annular temperature distributions between dual-gradient drilling and conventional single-gradient drilling were investigated,as were the wellbore heat transfer characteristics for dual-gradient *** following major conclusions were drawn:(1)for dualgradient drilling based on downhole separation,at the separator location,the annular fluid temperature does not decrease,but rather increase in the flow direction because of the inflow of hollow spheres;(2)a clear inflection point exists in the annular fluid temperature curve at the location where the separator would be;(3)the magnitude of the mutation of the temperature curve at the inflection point is considerably affected by the heat capacities of the hollow spheres and the pure drilling fluid;(4)under the same change in separation efficiency,distance between the bit and separator,flow rate,and thermal conductivity of formation,the variation range of the fluid temperature at the bottom hole is greater than that at the wellhead.

关键词： Dual-gradient drilling Heat transfer Downhole separation Hollow sphere Annular temperature distribution

A self-powered solar-blind UV-enhanced Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction photodetector for full spectral photoresponse and imaging

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Nano Research 2024年第4期17卷 2960-2970页

作者： Yajie Han shujie Jiao Jiangcheng Jing Lei Chen Ping Rong Shuai ren Dongbo Wang Shiyong Gao Jinzhong Wang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Self-powered full-spectrum photodetectors(PDs)offer numerous advantages,such as broad application fields,high precision,efficiency,and multi-functionality,which represent a highly promising and potentially valuable class of detectors for future ***,insensitive response to solar-blind ultraviolet(UV)and complex and expensive preparation processes greatly limit their performance and practical *** this study,a self-powered full-spectrum Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction PD with high sensitivity for solar-blind UV band prepared by a simple and low-cost two-step synthesis method is *** results reveal that the developed PD has an excellent performance,such as high sensitivity from 200 to 850 nm,and a responsivity of 1.38 mA/W as well as a detectivity of 3.22×10^(10) Jones under 254 nm light at zero ***,the unencapsulated device displays exceptional stability and imaging *** is expected that Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction PD with a simple and low-cost synthesis method has great potential for self-powered full-spectrum photodetectors.

关键词： Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si self-powered photodetector full spectral photoresponse imaging

紫外光照射对环烷基高压加氢橡胶油性质的影响

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石油商技 2004年第4期22卷 9-11,20页

作者：韩生程型国马书杰任天辉上海交通大学化学化工学院中国石油润滑油研究开发中心<兰州>贾?730060 中国石油润滑油研究开发中心<克拉玛依>死暌?934003

以克拉玛依高压加氢环烷基橡胶油KN4010为原料,采用折射指数法、紫外分光光度法、薄层包谱和气相色谱-质谱联用等方法,系统地研究了橡胶油在紫外光照射条件下所发生的物理性质和化学组成的变化。研究结果表明,高压加氢环烷基橡胶油在紫... 详细信息

以克拉玛依高压加氢环烷基橡胶油KN4010为原料,采用折射指数法、紫外分光光度法、薄层包谱和气相色谱-质谱联用等方法,系统地研究了橡胶油在紫外光照射条件下所发生的物理性质和化学组成的变化。研究结果表明,高压加氢环烷基橡胶油在紫外光照射下透光率的变化趋势是一个能较好评价其光安定性的物理指标;且芳香烃和胶质的组成变化是影响其颜色安定性的最主要原因。

关键词：橡胶油合成橡胶原料紫外光折射指数测定仪自由基链反应色度