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Research on assistant decision-makings of Ecommerce platform with refinement tools

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Journal of Control and Decision 2021年第3期8卷 303-313页

作者： hongwei liu Mingjun Zhan Hongming Gao Hui Zhu Ruichao He School of Management Guangdong University of TechnologyGuangzhouPeople’s Republic of China School of Management Guangzhou UniversityGuangzhouPeople’s Republic of China

Most existing studies of consumer search behaviour focus on page-level analysis,and some scholars start to examine the effect of refinement tools and characteristics in terms of products.However,it still remains undeveloped on the product-level.To fill this gap,we reproduced the consumer shopping process in accordance with the topology of the Taobao platform from where we collected the clickstream data.We modelled consumers’sequential decision-making behaviour based on the taxonomy with Bayesian approach and found that not all the refinement tools are utilised for optimising decisions by users and it’s surprising that there exists no significant impact of all sorting tools.Besides,consumers are highly concerned with the characteristics of products.On the basis of the findings,platform function announcement and platform design suggestions were provided for improving platform functionality and optimising consumer decision-making,which also points out the direction of future research.

关键词： Decision making optimisation refinement tools product characteristics clickstream Bayesian approach

基于多模态图像融合的DCCNN识别电能质量扰动

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现代电子技术 2024年第3期47卷 137-142页

作者：余雷刘宏伟孟芸长安大学能源与电气工程学院陕西西安710018 长安大学电子与控制工程学院陕西西安710064

为提高电力系统中电能质量扰动识别准确率,提出一种基于多模态图像融合的双通道卷积神经网络算法。首先,为降低传统格拉姆求和场生成特征图的冗余度,提出一种改进的格拉姆求和场;然后,通过改进的格拉姆求和场、马尔可夫转移场和无阈值... 详细信息

为提高电力系统中电能质量扰动识别准确率,提出一种基于多模态图像融合的双通道卷积神经网络算法。首先,为降低传统格拉姆求和场生成特征图的冗余度,提出一种改进的格拉姆求和场;然后,通过改进的格拉姆求和场、马尔可夫转移场和无阈值递归图分别将电能质量扰动时序数据进行模态变换;其次,对转换生成的三类图像各提取出一个单通道灰度图进行融合;最后,将融合得到的特征图输入到双通道卷积神经网络中进行扰动识别。实验表明:多模态融合得到的特征图扰动特征保留更多,而且双通道卷积神经网络提取特征能力强,具有一定的抗噪鲁棒性,扰动识别准确率高。

关键词：电能质量扰动格拉姆求和场马尔可夫转移场无阈值递归图双通道卷积神经网络识别

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冷金属过渡(CMT)技术综述

材料导报 2024年第S1期38卷 422-430页

作者：周星宇刘红伟田甜内蒙金属材料研究所内蒙古包头014000 中国兵器科学研究院宁波分院浙江宁波315000

冷金属过渡(CMT)技术作为一种先进的焊接技术,因其焊接过程中较低的热输入和低飞溅等优点而得到广泛的应用。本文主要对CMT技术的历史由来、工作原理和技术优点进行简要回顾;并且罗列了各种CMT技术类别。对于CMT技术最近以来在同种金属... 详细信息

冷金属过渡(CMT)技术作为一种先进的焊接技术,因其焊接过程中较低的热输入和低飞溅等优点而得到广泛的应用。本文主要对CMT技术的历史由来、工作原理和技术优点进行简要回顾;并且罗列了各种CMT技术类别。对于CMT技术最近以来在同种金属焊接、异种金属焊接和增材制造三大领域的研究与应用的现状进行了介绍;同时介绍一些CMT辅助手段的应用。最后,对CMT技术未来发展前景提出了一些建议。

关键词：冷金属过渡(CMT)技术同种金属焊接异种金属焊接电弧增材制造 CMT辅助手段

Synthesis of hexagonal boron nitrides by chemical vapor deposition and their use as single photon emitters

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Nano Materials Science 2021年第3期3卷 291-312页

作者： hongwei liu Chae Young You Jingwei Li Patrick Ryan Galligan Jiawen You Zhenjing liu Yuting Cai Zhengtang Luo Department of Chemical and Biological Engineering the Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong Kong

Two-dimensional(2D)hexagonal boron nitride(hBN),due to its extraordinary thermal,chemical,and optical properties,has arisen as an enticing material for the research community to explore for various applications,including the use of site defects in hBN as single photon emitters(SPEs).In this review,we systematically summarize recent advanced strategies towards the controllable synthesis of 2D hBN using chemical vapor deposition,towards a full control of the domain size,orientation,morphology,layer number,and stacking order,etc.Moreover,we review the underlying mechanisms for single photon emission(SPE)in hBN and methods to selectively generate and tune the SPEs.Defects(e.g.,carbon substituted defects)are discussed for the potential use as emission sites.We finally give an outlook of future challenges and opportunities on desirable hBN synthesis and further investigation of SPEs in hBN,targeting to utilize hBN as single photon emitters in an industrial scale.

关键词： hBN CVD Controllable synthesis Single photon emission

Reconstitution of biosynthetic pathway for mushroom-derived cyathane diterpenes in yeast and generation of new“non-natural”analogues

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Acta Pharmaceutica Sinica B 2021年第9期11卷 2945-2956页

作者： Ke Ma Yuting Zhang Cui Guo Yanlong Yang Junjie Han Bo Yu Wenbing Yin hongwei liu State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Savaid Medical School University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Microbial Physiological and Metabolic Engineering Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China

Mushroom-derived cyathane-type diterpenes possess unusual chemical skeleton and diverse bioactivities.To efficiently supply bioactive cyathanes for deep studies and explore their structural diversity,de novo synthesis of cyathane diterpenes in a geranylgeranyl pyrophosphate engineered Saccharomyces cerevisiae is investigated.Aided by homologous analyses,one new unclustered FAD-dependent oxidase EriM accounting for the formation of allyl aldehyde and three new NADP(H)-dependent reductases in the biosynthesis of cyathanes are identified and elucidated.By combinatorial biosynthetic strategy,S.cerevisiae strains generating twenty-two cyathane-type diterpenes,including seven"unnatural"cyathane xylosides(12,13,14a,14b,19,20,and 22)are established.Compounds 12-14,19,and 20 show significant neurotrophic effects on PC 12 cells in the dose of 6.3-25.0μmol/L.These studies provide new insights into the divergent biosynthesis of mushroom-originated cyathanes and a straightforward approach to produce bioactive cyathane-type diterpenes.

关键词： Cyathane-type diterpene Biosynthesis Heterologous expression Non-enzymatic reaction

Optimal procurement strategy of fresh produce retailer under stochastic product qualification and market demand

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Journal of Control and Decision 2021年第2期8卷 192-200页

作者： Zhouyang Liang hongwei liu Meihua Zuo Hui Zhu Yonghua Zuo School of Management Guangdong University of TechnologyGuangzhouPeople’s Republic of China School of Architecture and Civil Engineering Huizhou UniversityHuizhouPeople’s Republic of China School of Management Guangzhou UniversityGuangzhouPeople’s Republic of China School of Mathematics and Information Science Jiangxi Normal UniversityNanchangPeople’s Republic of China Jiangxi Institute of Economic Development NanchangPeople’s Republic of China

Consider an optimal procurement strategy for fresh produce,which is a type of perishable product.Due to the different quality provided by each manufacturer,the fresh produce qualification rates are dissimilar.Simultaneously,consumers demand is influenced by the freshness and price of products,as a result,the demand in the market is not fixed.In this scenario,how a particular retailer should develop an optimal procurement strategy will be a core issue in supply chain management.In order to address the above questions,the Bayesian approach is adopted to explore retailer optimal procurement strategies with uncertainty about product supply and market demand.Finally,simulation data are used to analyse the results of the proposed model and expected non-random model to illustrate the validity and feasibility of the proposed model.

关键词： Fresh produce optimal procurement strategy stochastic product qualification uncertainty of supply and demand Bayesian decision theory

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工业建筑钢结构设计中存在的问题与应对策略

工程建设（维泽科技） 2024年第6期7卷 186-188页

作者：刘红伟河北建筑设计研究院有限责任公司河北石家庄050000

在现代工业厂房设计中,钢结构的应用十分普遍。然而,钢结构设计过程中存在的荷载计算困难、构件设计参数不准确以及整体结构复杂等问题,给建筑设计带来了诸多挑战。这些问题导致了各类质量和成本问题的频繁出现,严重影响了钢结构建筑的... 详细信息

在现代工业厂房设计中,钢结构的应用十分普遍。然而,钢结构设计过程中存在的荷载计算困难、构件设计参数不准确以及整体结构复杂等问题,给建筑设计带来了诸多挑战。这些问题导致了各类质量和成本问题的频繁出现,严重影响了钢结构建筑的综合效益。为了解决工业建筑钢结构设计中的各项问题,文中提出了一系列应对措施。通过采取措施,可以有效提高钢材的利用效率,解决建筑施工成本问题,从而实现厂房建筑钢结构设计水平的提升。这将有助于提高工程质量、降低成本,并促进工业厂房建筑的可持续发展。

关键词：工业建筑钢结构设计问题与策略

Enhanced photodynamic therapy of mixed phase TiO2（B）/anatase nanofibers for killing of HeLa cells

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Nano Research 2014年第11期7卷 1659-1669页

作者： Shuchao Zhang Dongjiang Yang Dengwei Jing hongwei liu Long liu Yi Jia Meihua Gao Liejin Guo Ziyang Huo Department of Blood Transfusion the Affifiated Hospital of Medical College Qingdao University Oingdao 266003 China Department of Immunology Medical College of Qingdao University Qingdao266000 China Collaborative Innovation Centre for Marine Biomass Fibers Materials and Textiles of Shandong Province College of Chemical and Environmental Engineering Qingdao University Qingdao China Queensland Micro- and Nanotechnology Centre (QMNC) Griffith University Nathan Brisbane QLD 4111 Australia International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering College of Chemistry Chemical and Environmental Engineering Xi'an Jiaotong University Xi'an 710049 China Australian Centre for Microscopy and Microanalysis (ACMM) the University of Sydney Sydney NSW 2006 Australia

光力学的治疗(太平洋夏季时间) 是使用使药具有感光性有选择地使用治疗指向地点的一个过程，被证明了是为可以发展成癌症的癌症和条件的安全治疗。缩放 Nano 的 TiO 2 为紫外轻驾驶太平洋夏季时间被认为是潜在的 photosensitizer。在... 详细信息

光力学的治疗(太平洋夏季时间) 是使用使药具有感光性有选择地使用治疗指向地点的一个过程，被证明了是为可以发展成癌症的癌症和条件的安全治疗。缩放 Nano 的 TiO 2 为紫外轻驾驶太平洋夏季时间被认为是潜在的 photosensitizer。在这研究， TiO 的四种类型 2 nanofibers 从质子 tri-titanate 被准备( H 2 T 3 O 7 ) nanofiber 。同样获得的 nanofibers 为太平洋夏季时间杀死 HeLa 房间作为有效 photosensitizers 被表明。MTT 试金和流动 cytometry (FCM ) 被执行评估 biocompatibility， apoptotic 房间的百分比，和房间生存能力。同样准备的 TiO 的 non-cytotoxicity 当紫外照耀不在时的 2 nanofibers 也被表明了。在紫外轻照耀下面， TiO 2 nanofibers，特别地混合阶段 nanofibers，比 Pirarubicin (THP ) 显示了高得多的杀死房间的效率，它是普通的药导致 HeLa 房间的 apoptosis。我们归功于混合阶段 nanofibers 的高 cellkilling 效率到在 TiO 之间的 bandgap 边比赛和稳定的接口 2 (B) 和锐钛矿在单个 nanofiber 分阶段执行，它能禁止 photogenerated 电子和洞的再结合。这支持费用分离和转移过程和罐头生产负责杀死 HeLa 房间的更多的反应的氧种类(ROS ) 。

关键词：纳米TiO2 Hela细胞纳米纤维光动力疗法锐钛矿相混合相杀伤 HeLa细胞

Composition-dependent ultra-high photoconductivity in ternary CdSxSe1-x nanobelts as measured by optical pump-terahertz probe spectroscopy

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Nano Research 2013年第11期6卷 808-821页

作者： hongwei liu Junpeng Lu Minrui Zheng Sing Hai Tang Xinhai Zhang Chorng Haur Sow Department of Physics 2 Science Drive 3 National University of Singapore 117542 Singapore Institute of Materials Research and Engineering Agency for Science Technology and Research (A'STAR) 3 Research Link 117502 Singapore

我们采用光泵兆兆赫探查光谱学在第三的 CdS x Se1x nanobelts 调查作文依赖者光导增益。CdS nanobelts 的观察搬运人动力学第三的 CdS x Se1x nanobelts 比那些显示许多更短的一生。这作为潜在地以切换的速度交换设备直到 46.7 GHz 的 ... 详细信息

我们采用光泵兆兆赫探查光谱学在第三的 CdS x Se1x nanobelts 调查作文依赖者光导增益。CdS nanobelts 的观察搬运人动力学第三的 CdS x Se1x nanobelts 比那些显示许多更短的一生。这作为潜在地以切换的速度交换设备直到 46.7 GHz 的 ultrafast 显示 CdS nanobelts 的实现。令人惊讶地，第三的 CdS x Se1x nanobelts 被发现比二进制 CdS 和 CdSe 展出高得多的光导增益。这在第三的混合物被归因于更高的 photocarrier 密度。另外，在样品的 Se 的存在导致了突出的象 CdSe 一样横向光(到) 声子模式由于电子声子相互作用。这个模式的力量在 photoexcitation 之上显示出大落下，但是与时间逐渐地恢复。这些结果证明第三的 nanostructures 的生长能被利用在 nanostructures 减轻高表面缺点密度并且改进他们的光导增益。

关键词：三元化合物光电导性纳米带太赫兹光泵浦光谱测量光学组成