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Enhancing Next-Item Recommendation Through Adaptive User Group Modeling

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Journal of Social Computing 2023年第2期4卷 112-124页

作者： nengjun zhu Lingdan Sun Jian Cao Xinjiang Lu Runtong Li the School of Computer Engineering and Science Shanghai UniversityShanghai 200444China the Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China the Business Intelligence Lab Baidu ResearchBeijing 100085China the Department of Electronic Engineering Tsinghua UniversityBeijing 100084China

Session-based recommender systems are increasingly applied to next-item ***,existing approaches encode the session information of each user independently and do not consider the interrelationship between *** work is based on the intuition that dynamic groups of like-minded users exist over *** considering the impact of latent user groups,we can learn a user’s preference in a better *** this end,we propose a recommendation model based on learning user embeddings by modeling long and short-term dynamic latent user ***,we utilize two network units to learn users’long and short-term sessions,***,we employ two additional units to determine the affiliation of users with specific latent groups,followed by an aggregation of these latent group ***,user preference representations are shaped comprehensively by considering all these four aspects,based on an attention ***,to avoid setting the number of groups manually,we further incorporate an adaptive learning unit to assess the necessity for creating a new group and learn the representation of emerging groups *** experiments prove our model outperforms multiple state-of-the-art methods in terms of Recall,mean average precision(mAP),and area under curve(AUC)metrics.

关键词： session-based recommender user group modeling attention mechanism adaptive learning

主动拉杆式V形墩及0#块支架结构设计及验算

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工程技术研究 2024年第7期9卷 176-178页

作者：朱能军戴志成吕相斌彭永超叶鑫中交路桥建设有限公司北京100027

预应力混凝土V形刚构桥具有线条和造型优美、能与环境融为一体的外观特点,能减少墩顶主梁的负弯矩,减少计算跨径。文章以梅山水道跨堤桥V形桥及0#块施工为背景,创新设计了主动拉杆式V形墩及0#块临时支架结构,该结构能自主平衡构件产生... 详细信息

预应力混凝土V形刚构桥具有线条和造型优美、能与环境融为一体的外观特点,能减少墩顶主梁的负弯矩,减少计算跨径。文章以梅山水道跨堤桥V形桥及0#块施工为背景,创新设计了主动拉杆式V形墩及0#块临时支架结构,该结构能自主平衡构件产生的水平分力,使支架架构更稳定,同时减少了工程量,提高了施工效率。在此基础上,文章提出了主动拉杆式V形墩及0#块临时支架结构验算方法及验算结果,进一步验证了结构设计的合理性。

关键词： V形墩 0#块支架设计结构验算

A Semi-Supervised Attention Model for Identifying Authentic Sneakers

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Big Data Mining and Analytics 2020年第1期3卷 29-40页

作者： Yang Yang nengjun zhu Yifeng Wu Jian Cao Dechuan Zhan Hui Xiong National Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Alibaba Company Hangzhou 310000China Rutgers University New YorkNJ 07102USA

To protect consumers and those who manufacture and sell the products they enjoy,it is important to develop convenient tools to help consumers distinguish an authentic product from a counterfeit *** advancement of deep learning techniques for fine-grained object recognition creates new possibilities for genuine product *** this paper,we develop a Semi-Supervised Attention(SSA)model to work in conjunction with a large-scale multiple-source dataset named YSneaker,which consists of sneakers from various brands and their authentication results,to identify authentic ***,the SSA model has a self-attention structure for different images of a labeled sneaker and a novel prototypical loss is designed to exploit unlabeled data within the data *** model draws on the weighted average of the output feature representations,where the weights are determined by an additional shallow neural *** allows the SSA model to focus on the most important images of a sneaker for use in identification.A unique feature of the SSA model is its ability to take advantage of unlabeled data,which can help to further minimize the intra-class variation for more discriminative feature *** validate the model,we collect a large number of labeled and unlabeled sneaker images and perform extensive experimental *** results show that YSneaker together with the proposed SSA architecture can identify authentic sneakers with a high accuracy rate.

关键词： sneaker identification fine-grained classification multi-instance learning attention mechanism

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多层次个性化临床路径推荐方法

计算机集成制造系统 2022年第10期28卷 3316-3324页

作者：顾扬曹健朱能军陈小松沈坤炜上海交通大学计算机科学与工程系上海200240 上海大学计算机工程与科学学院上海200444 上海交通大学医学院附属瑞金医院上海200025

针对临床路径受专家主观影响大、难以反映患者个性化差异等问题,提出一个过程层次临床路径的挖掘模型,利用启发式网络挖掘和社区发现的Louvain算法挖掘出抽象临床路径。为减少医学本身存在的不确定性,结合实际医生诊疗过程的层次性,进... 详细信息

针对临床路径受专家主观影响大、难以反映患者个性化差异等问题,提出一个过程层次临床路径的挖掘模型,利用启发式网络挖掘和社区发现的Louvain算法挖掘出抽象临床路径。为减少医学本身存在的不确定性,结合实际医生诊疗过程的层次性,进一步提出一个抽象—具体临床路径的推荐模型,在推荐的抽象临床路径基础上分阶段进行推荐,最终形成具体的临床路径。实验结果表明,该方法无论在有效性还是与医生决策过程的符合度上均具有一定意义,可以为医生提供合理的决策支持。

关键词：临床路径过程层次挖掘抽象具体推荐决策支持

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构建协同模式探索校企合作长效机制

绍兴文理学院学报 2016年第10期36卷 79-82页

作者：朱能军浙江农业商贸职业学院浙江绍兴312088

校企合作是职业教育的必由之路,也是必经之路。建立有效的长效合作机制和开展富有成效的合作,是政府部门、职业院校和合作企业共同的追求。浙江农业商贸职业学院通过建立"校政行企"协同、专业群联动、课程与企业项目协同、教师学生和企... 详细信息

校企合作是职业教育的必由之路,也是必经之路。建立有效的长效合作机制和开展富有成效的合作,是政府部门、职业院校和合作企业共同的追求。浙江农业商贸职业学院通过建立"校政行企"协同、专业群联动、课程与企业项目协同、教师学生和企业员工协同、校园文化和行业文化协同、学校资源与企业资源协同等多元协同模式,有效建立了校企合作的长效机制。

关键词：校企合作协同机制

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石璜花卉经济在发展中相关问题的探讨

华东森林经理 2001年第3期15卷 56-57页

作者：朱能钧浙江省嵊州市石璜镇林技站 312471

浙江省嵊州市石璜镇是绍兴市唯一的“花木之乡”,现已申报省“花木之乡”。分析了石璜花卉经济的现状、有利条件和存在问题。提出了合理布局 ,科技创新 ,加大投入。

关键词：石璜镇花卉经济产业体系浙江嵊州市政府科技

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高职院校试行现代学徒制首要解决的五个问题

绍兴文理学院学报 2017年第11期37卷 56-60页

作者：朱能军骆雄伟浙江农业商贸职业学院浙江绍兴312088 绍兴市江南大学研究院浙江绍兴312000

国内职业院校在21世纪初逐渐开始进行现代学徒制的探索实践,在校企合作、工学交替、产教深度融合等方面取得了明显成效,初显双元育人、学生双重身份、招生招工等现代学徒制特征。我国现代学徒制与西方发达国家相比,在国家政策和制度体... 详细信息

国内职业院校在21世纪初逐渐开始进行现代学徒制的探索实践,在校企合作、工学交替、产教深度融合等方面取得了明显成效,初显双元育人、学生双重身份、招生招工等现代学徒制特征。我国现代学徒制与西方发达国家相比,在国家政策和制度体系、社会外部环境、学校内部条件等方面还存在许多制约因素。为全面推行职业教育现代学徒制,国家遴选了部分行业、企业和学校先开展试点工作。现代学徒制试点,必须先解决好选什么专业试点、选什么企业试点、选什么样的师傅、设计什么样的人才培养方案以及校企双方管理责任如何落实等五个问题,才能有效解决职业教育的供需不匹配的矛盾。

关键词：高职院校现代学徒制问题

Micron-scale 1:5H-based precipitated phase with the lamellar structure of sintered Sm_(2)Co_(17)-based magnets and its potential application

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Journal of Materials Science & Technology 2023年第22期153卷 159-165页

作者： nengjun Yu Yingchang Li Zesong Ren Minxiang Pan Hangfu Yang Qiong Wu Hongliang Ge Minggang zhu Wei Li College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing 100081China

The excellent thermal stability of magnetic properties of Sm_(2)Co_(17)-based magnets is their most impor-tant ***,this stability is reduced when the maximum energy product of Sm_(2)Co_(17)-based magnets is improved,which is mainly determined by the Fe/Cu distribution of the 2:17R cell and 1:5H cell boundary *** the demagnetization process,the Cu-rich 1:5H cell boundary phase with a width of 2-15 nm obstructs the motion of the domain walls,yielding ***,we report a micron-scale Cu/Zr-rich and Fe-lean 1:5H-based precipitated phase with a lamellar structure,probably induced by Sm_(2)O_(3) *** structure enables the separate regulation of Fe and Cu distribution for Sm_(2)Co_(17)-based magnets with Fe-rich 2:17R cell phases and Cu-rich 1:5H cell boundary phases,consid-erably optimizing the thermal stability of magnetic *** discovery can be further developed to produce Sm_(2)Co_(17)-based magnets with high performance and excellent thermal stability of magnetic properties.

关键词： Sm_(2)Co_(17)-type magnets Thermal stability of magnetic properties 1:5H-based precipitated phase Element distribution

The microstructure and magnetization reversal behavior of melt-spun (Nd_(1-x)Ce_x)-Fe-B ribbons

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Journal of Rare Earths 2018年第1期36卷 95-98页

作者： liwei song nengjun yu minggang zhu qiang wang wei li division of functional materials central iron and steel research instituteBeijing 100081China key laboratory of national education ministry for electromagnetic processing of materials northeastern universityShenyang 110819China school of materials science and engineering northeastern universityShenyang 110819China

In this study, the alloy ingots with nominal compositions of （Nd1_xCex）31FebalCoo.2Gao.1B （x = 0, 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%） were prepared and then melt-spun to form nanocrystalline ribbons at the wheel speed of 20 m/s. XRD results show that all melt-spun ribbons exhibit the tetragonal structure （Nd,Ce）2Fe14B phase with the space group P42]rnmm. The Curie temperature and lattice constant decrease with the increase of Ce content. The Curie temperature decreases gradually from 306 to 247 ~C with the increase of Ce content. Those results indicate that Ce element has been incorporated into Nd2Fe14B main crystalline phase and formed （Ce,Nd）-Fe-B hard magnetic phase. It is also found that the remanence ratio （Mr/Ms） decreases from 0.693 to 0.663 and the coercivity （Hc） decreases from 18.7 to 14.2 kOe with the increase of Ce content. However, a relatively high coercivity of 18.3 kOe for （Ndl xCex）*** （x = 0.2） melt-spun ribbon is achieved. The coercivity is sensitive to microstructure. The AFM patterns show the sample （x - 0.2） has the most uniform and finest micro- structure. The magnetization reversal behavior （0M plots） is discussed in detail. The positive 0M value is observed in every sample, which confirms the existence of exchange coupling interaction. Evidently, the OM maximum value reaches 0.9 in the sample （x - 0.2）. It is indicated that the intergranular exchange coupling effect is the strongest, which is consistent with coercivity enhancing.

关键词： Ce contentMelt-spun ribbonsHigh coercivityMicrostructureRare earthsMagnetization reversal