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SGNR: A Social Graph Neural Network Based Interactive Recommendation Scheme for E-Commerce

Tsinghua Science and Technology 2023年第4期28卷 786-798页

作者： dehua ma Yufeng Wang Jianhua ma Qun Jin School of Communications and lnformation Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Department the Faculty of Computer and Information SciencesHosei UniversityTokyo 194-0298Japan Networked Information Systems Laboratory Department of Human Informatics and Cognitive SciencesFaculty of Human SciencesWaseda UniversityTokyo 169-8050Japan

Interactive Recommendation(IR)formulates the recommendation as a multi-step decision-making process which can actively utilize the individuals’feedback in multiple steps and optimize the long-term user benefit of *** Reinforcement Learning(DRL)has witnessed great application in IR for ***,user cold-start problem impairs the learning process of the DRL-based recommendation ***,most existing DRL-based recommendations ignore user relationships or only consider the single-hop social relationships,which cannot fully utilize the social *** fact that those schemes can not capture the multiple-hop social relationships among users in IR will result in a sub-optimal *** address the above issues,this paper proposes a Social Graph Neural network-based interactive Recommendation scheme(SGNR),which is a multiple-hop social relationships enhanced DRL *** this framework,the multiple-hop social relationships among users are extracted from the social network via the graph neural network which can sufficiently take advantage of the social network to provide more personalized recommendations and effectively alleviate the user cold-start *** experimental results on two real-world datasets demonstrate that the proposed SGNR outperforms other state-of-the-art DRL-based methods that fail to consider social relationships or only consider single-hop social relationships.

关键词： Interactive Recommendation(IR) Deep Reinforcement Learning(DRL) Graph Neural Network(GNN)

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Biological removal of antiandrogenic activity in gray wastewater and coking wastewater by membrane reactor process

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Journal of Environmental Sciences 2015年第7期27卷 195-202页

作者： dehua ma Lujun Chen Cong Liu Chenjun Bao Rui Liu School of Environment Tsinghua University Zhejiang Provincial Key Laboratory of Water Science and Technology

A recombinant human androgen receptor yeast assay was applied to investigate the occurrence of antiandrogens as well as the mechanism for their removal during gray wastewater and coking wastewater treatment. The membrane reactor（MBR） system for gray wastewater treatment could remove 88.0% of antiandrogenic activity exerted by weakly polar extracts and 97.3% of that by moderately strong polar extracts, but only 32.5%of that contributed by strong polar extracts. Biodegradation by microorganisms in the MBR contributed to 95.9% of the total removal. After the treatment, the concentration of antiandrogenic activity in the effluent was still 1.05 μg flutamide equivalence（FEQ）/L, 36.2%of which was due to strong polar extracts. In the anaerobic reactor, anoxic reactor, and membrane reactor system for coking wastewater treatment, the antiandrogenic activity of raw coking wastewater was 78.6 mg FEQ/L, and the effluent of the treatment system had only 0.34 mg FEQ/L. The antiandrogenic activity mainly existed in the medium strong polar and strong polar extracts. Biodegradation by microorganisms contributed to at least 89.2%of the total antiandrogenic activity removal in the system. Biodegradation was the main removal mechanism of antiandrogenic activity in both the wastewater treatment systems.

关键词： Biological removal Antiandrogenic activity Gray wastewater Coking wastewater Membrane reactor

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Development of lutetium oxide continuous fibers with excellent mechanical properties

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Journal of Advanced Ceramics 2023年第1期12卷 24-35页

作者： Yongshuai XIE Ying PENG Youmei WANG dehua ma Yuan CHENG Luyi ZHU Jiecai HAN Xinghong ZHANG National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Crystal materials Institute of Crystal MaterialsShandong UniversityJinan 250100China

The difficulty of reducing the diameter of lutetium oxide(Lu_(2)O_(3))continuous fibers below 50μm not only limits the flexibility of the sample but also seriously affects their application and development in high-energy *** this work,a Lu-containing precursor with high ceramic yield was used as raw material,fiberized into precursor fibers by dry *** pressure-assisted water vapor pretreatment(PAWVT)method was creatively proposed,and the effect of pretreatment temperature on the ceramization behavior of the precursor fibers was *** regulating the decomposition behavior of organic components in the precursor,the problem of fiber pulverization during heat treatment was effectively solved,and the Lu_(2)O_(3) continuous fibers with a diameter of 40μm were *** with the current reported results,the diameter was reduced by about 50%,successfully breaking through the diameter limitation of Lu_(2)O_(3) continuous *** addition,the tensile strength,elastic modulus,flexibility,and temperature resistance of Lu_(2)O_(3) continuous fibers were researched for the first *** tensile strength and elastic modulus of Lu_(2)O_(3) continuous fibers were 373.23 MPa and 31.55 GPa,*** as-obtained flexible Lu_(2)O_(3) continuous fibers with a limit radius of curvature of 3.5-4.5 mm had a temperature resistance of not lower than 1300℃,which established a solid foundation for the expansion of their application form in the field of high-energy lasers.

关键词： lutetium oxide(Lu_(2)O_(3)) continuous fibers tensile strength flexible temperature resistance

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Modification of YSZ fiber composites by Al_(2)TiO_(5) fibers for high thermal shock resistance

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Journal of Advanced Ceramics 2022年第6期11卷 922-934页

作者： Wei LIU Yongshuai XIE Zhezhe DENG Ying PENG Jianhong DONG Ze ZHU dehua ma Luyi ZHU Guanghui ZHANG Xinqiang WANG State Key Laboratory of Crystal materials School of Crystal MaterialsShandong UniversityJinan 250100China

Yttria-stabilized zirconia(YSZ)fiber composites are highly efficient thermal insulating materials;however,the poor thermal shock resistance limits their versatile *** the present study,YSZ fiber was mixed directly with Al_(2)TiO_(5)fiber,which had an extremely low thermal expansion coefficient,to prepare YSZ–Al_(2)TiO_(5)(ZAT)fiber composites by compression molding and heat *** minimum thermal expansion coefficient of the prepared ZAT fiber composites was measured to be 7.74×10^(−6)K^(−1),which was 26%lower than that of the YSZ fiber composites(10.42×10^(−6)K^(−1)).It was shown that the prepared ZAT fiber composites maintain the integrity after undergoing 51 thermal shock cycles between 1100℃and room ***,YSZ fiber composites burst immediately after only one thermal shock cycle under the same *** addition,the ZAT fiber composites also exhibit considerable mechanical and thermal insulating performance.

关键词： Al_(2)TiO_(5)fibers YSZ-Al_(2)TiO_(5)fiber composites thermal expansion thermal shock resistance thermal insulating

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Study on the Resistance of Cucumber to Temperature Stresses

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Agricultural Sciences in China 2000年第1期 80-89页

作者： ma dehua Tianjin Cucumber Research Institute Tianjin 300192

Four cucumber (Cucumis sativus L. ) inbred lines with different resistances to temperature stress were used in this experiment. The seedlings of line Q10 and Q21 that have high resistance to chilling stress also have high resistance to heat stress. The seedlings of line T94 and T55 that have lower resistance to chilling stress also have lower resistance to heat stress. It seems that the resistance of cucumber seedlings to different temperature stresses was similar. The influences of chilling and heat stress on the germination ability of cucumber seeds were different. Under the chilling stress, the germination percentage decreased less, and the germination velocity decreased more,so the germination index decreased significantly. Under the heat stress, the germination percentage and velocity of the seeds with high resistance decreased less and those of the seeds with lower resistance decreased more. The differences among the lines became more evident under the extreme heat condition. The content of chlorophyll decreased under the different temperature stresses, the content of chlorophyll a decreased more than that of chlorophyll b, so the value of chlorophyll a/b *** temperature stress inhibited the photosynthesis of cucumber seedlings significantly. After chilling or heat treatment, the net photosynthetic rate (Pn) decreased remarkably. With the stomatal conductance (Gs) decreased, the stomatal limited value (Is) decreased, the intercellular CO2 concentration (Ci) increased, and both the apparent quantum efficiencies (AQE) and the carboxylation efficiencies (CE) decreased. Results showed that the non-stomatal factors were the main causes of Pn decrease, and the photosynthetic mechanism was destroyed remarkably.

关键词： Cucumber seedling Temperature stress Resistance Germination Photosynthesis

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我国宪法言论自由条款类似于美国宪法第一修正案吗?

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比较法研究 2016年第4期30卷 131-145页

作者：马得华山东大学法学院

言论自由的法律保护离不开宪法视角,解释宪法需要考虑文本、结构和历史。我国宪法言论自由条款和美国宪法第一修正案既相像又有所不同。美国宪法文本没有规定言论自由应承担的宪法义务,但由最高法院划定言论自由的界限;我国宪法文本规... 详细信息

言论自由的法律保护离不开宪法视角,解释宪法需要考虑文本、结构和历史。我国宪法言论自由条款和美国宪法第一修正案既相像又有所不同。美国宪法文本没有规定言论自由应承担的宪法义务,但由最高法院划定言论自由的界限;我国宪法文本规定了言论自由及其界限。美国采用"不得立法"模式,禁止立法剥夺,法院可直接援引宪法;我国采用"经由立法"模式,先将宪法言论自由具体化为法律,然后法院援引法律。美国宪法属于"差别保护",公共言论的保护优于私人言论;我国宪法承认这一区分,但具体化为法律后消除了这一区分。中美两国宪法均承认人民主权,这为我国言论自由条款的重新解释提供了可能。民法和刑法有关言论的规定应予以重新解释。

关键词：言论自由第一修正案诽谤罪名誉权公众人物

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微乳液的油水分离和机理探讨及应用

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化工学报 2013年第5期64卷 1797-1802页

作者：秦娟辛寅昌马德华山东师范大学化学化工与材料科学学院山东济南250014 济南科慧页岩化工技术有限公司山东济南250101

用特种表面活性剂使热力学稳定的微乳液变成热力学不稳定的乳状液,并发现该种特种表面活性剂与聚合物复配后能使微乳液油水分离。通过透射电镜(TEM)分析发现含有不溶性有机物的透明脱墨造纸废水的分散颗粒远远小于可见光的波长,呈现微... 详细信息

用特种表面活性剂使热力学稳定的微乳液变成热力学不稳定的乳状液,并发现该种特种表面活性剂与聚合物复配后能使微乳液油水分离。通过透射电镜(TEM)分析发现含有不溶性有机物的透明脱墨造纸废水的分散颗粒远远小于可见光的波长,呈现微乳液状态,以该种透明废水作为实验对象,用特种表面活性剂与聚合物LYPW-301复配后分离该种微乳液状废水,通过化学需氧量(COD)测定表明:这种分离方法能够有效降低该种微乳液状废水的COD值。通过TEM分析微乳液和乳状液显微状态的变化探讨了微乳液的油水分离机理。这种分离方法能够有效地应用于其他各种造纸透明废水和油田透明废水的分离中。

关键词：特种表面活性剂微乳液乳状液油水分离透射电镜(TEM) 化学需氧量(COD)

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全卷积神经网络的车辆点云目标精细化检测

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测绘科学 2020年第3期45卷 95-102页

作者：马得花闫宏亮青海省遥感测绘院西宁810001

针对无人驾驶技术高速发展中车辆目标的3D检测仍存在局限性的问题,该文提出了一种基于全卷积神经网络的车辆点云三维目标检测框架。进行了深度学习技术在二维图像的目标检测成熟应用的调查,将全卷积神经网络的目标检测扩展到三维点云数... 详细信息

针对无人驾驶技术高速发展中车辆目标的3D检测仍存在局限性的问题,该文提出了一种基于全卷积神经网络的车辆点云三维目标检测框架。进行了深度学习技术在二维图像的目标检测成熟应用的调查,将全卷积神经网络的目标检测扩展到三维点云数据。该算法在KITTI数据集上进行了测试,并与先前基于点云的车辆检测方法进行比较表明算法性能有着显著提高。研究结果可以应用于激光雷达点云实现车辆检测任务,从而可以较好地服务于自动驾驶。

关键词：车辆检测目标检测激光雷达点云全卷积神经网络交通测绘

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臭氧化芳香族化合物中生物毒性的演变规律研究

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环境科学学报 2021年第3期41卷 1111-1122页

作者：马雪柔魏建建马德华王连军南京理工大学环境与生物工程学院江苏省化工污染控制与资源化高校重点实验室南京210094

臭氧工艺越来越广泛地应用于难降解废水的处理,但由于臭氧的部分氧化特性,可能会导致高毒性中间产物的生成.为了揭示臭氧工艺的生态安全性,研究了不同工艺条件下,臭氧化苯酚、邻甲酚、对甲酚、间甲酚、苯胺和对氯苯胺时急性生物毒性的变... 详细信息

臭氧工艺越来越广泛地应用于难降解废水的处理,但由于臭氧的部分氧化特性,可能会导致高毒性中间产物的生成.为了揭示臭氧工艺的生态安全性,研究了不同工艺条件下,臭氧化苯酚、邻甲酚、对甲酚、间甲酚、苯胺和对氯苯胺时急性生物毒性的变化.结果表明,尽管母体污染物与总有机碳(TOC)的浓度在臭氧化过程中持续下降,但生物毒性随着反应时间的延长而明显增加,达到最大值后下降.当初始污染物浓度增大时,臭氧化6种芳香族化合物中毒性单位最大值(TUmax)也随之增大;当臭氧剂量增大,臭氧化苯酚、间甲酚和对氯苯胺的TUmax呈下降的趋势,臭氧化邻甲酚和苯胺的TUmax呈升高的趋势,臭氧化对甲酚的TUmax变化较小;当pH从3上升到7,臭氧化4种酚类化合物时,TUmax呈下降的趋势,而当pH增大到10时,苯酚和间甲酚的TUmax又出现了升高的现象;臭氧化2种胺类化合物时,pH对TUmax的影响较小.进一步研究发现,高毒性中间产物主要是由芳香族化合物与臭氧分子反应生成的,且具有氧化性.本研究能够为臭氧工艺的安全运行提供基础数据,并有助于后续生物毒性控制工艺的开发.

关键词：臭氧化芳香族化合物生物毒性中间产物氧化性物质

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main Feature and Potential Seismic Capability of Active Fault Belts in the Chengdu Depression

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Earthquake Research in China 1997年第1期11卷 61-70页

作者： Tang Rongchang,Huang Zuzhi,Qian Hong,Gong Yu,Wen dehua,ma Senghao,and Zhou RongjunSeismological Bureau of Sichuan Province,Chengdu 610041,China

Chengdu fault depression is an important Quaternary basin in the piedmont of Longmenshan *** and evolution of the fault depression are entirely controlled by the Longmenshan piedmont fault and the Longquanshan *** the late Quaternary,Chengdu fault depression has been subjected to an NW-SE oriented *** NE or NNE trending faults inside the depression or near its margins show thrust slip,resulting in moderate and strong earthquakes along the piedmont Longmenshan fault,the western slop Longquanshan fault,and Pujiang-Xinjin-Chengdu-Deyang *** is indicated that three faults as mentioned above have the potential capability for the occurrence of moderate earthquakes.

关键词： Chengdu depression Activity in later Quaternary Postential seismic capability

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