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From Internet Plus to Culture Plus

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China & The World Cultural Exchange 2015年第5期81卷 29-30页

作者： liu yuzhu

Internet plus cultural industry is new trend. The Internet will integrate itself into all sectors of the cultural industry. Its huge user base will bring new growth to the cultural industry By 2014, 49.8% of Internet literature testifies the user base of 600 million, which shows the integration between the Internet and the cultural industry expands the boundary of the latter one.

关键词：文化产业互联网发展趋势网络文学用户群增长点

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基于人脸视频的非接触式心率测量系统研究

现代信息科技 2024年第4期8卷 30-35页

作者：陈聪聪刘昱竹王海同缑奕轩郁翛然北京邮电大学电子工程学院北京100876

心率作为一项重要的生理特征信息,在医疗诊断方面有着不可替代的作用。非接触式心率检测无须与测试者直接接触即可测量出心率,避免了传统心率测量时测试者长时间接触仪器造成的不适,且成本更低,便携性更好。文章提出一种结合ICA和小波... 详细信息

心率作为一项重要的生理特征信息,在医疗诊断方面有着不可替代的作用。非接触式心率检测无须与测试者直接接触即可测量出心率,避免了传统心率测量时测试者长时间接触仪器造成的不适,且成本更低,便携性更好。文章提出一种结合ICA和小波变换的算法,对摄像头输入的人脸视频依次进行颜色空间转换、降噪、时频域变换等操作,并搭建了一个基于人脸视频的心率测算系统,针对不同指标设计了多个实验。实验结果表明,系统能够快速实时检测人体心率数据,实现非接触式心率检测,满足心率检测需求。

关键词：远程光电容积描记法心率测量图像处理小波变换

基于宏基因组测序的北京市部分零售预包装冷藏膳食微生物污染状况分析

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职业与健康 2024年第11期40卷 1486-1491页

作者：张鹏航张晓嫒刘玉竹陆峥马晓晨陈倩北京市疾病预防控制中心营养与食品卫生所北京100013

目的分析北京市部分零售预包装冷藏膳食微生物污染情况以及细菌群落特征。方法2022年7月,从北京市零售环节采集65件预包装冷藏膳食,采用食品微生物检验国家标准方法分别对金黄色葡萄球菌、大肠埃希菌、蜡样芽孢杆菌进行计数,对沙门菌、... 详细信息

目的分析北京市部分零售预包装冷藏膳食微生物污染情况以及细菌群落特征。方法2022年7月,从北京市零售环节采集65件预包装冷藏膳食,采用食品微生物检验国家标准方法分别对金黄色葡萄球菌、大肠埃希菌、蜡样芽孢杆菌进行计数,对沙门菌、单核细胞增生李斯特菌和致泻大肠埃希菌进行分离培养,使用宏基因组测序技术对食品中细菌群落进行注释。结果2件样品大肠埃希菌计数>10 CFU/g,7件样品蜡样芽孢杆菌计数>10^(3)CFU/g,所有样品金黄色葡萄球菌计数均<10 CFU/g。5件样品中分离出单核细胞增生李斯特菌,所有样品中均未分离出沙门菌和致泻大肠埃希菌。使用宏基因组测序注释124个门,621个科,2315个属,11631个物种,发现两类预包装冷藏膳食中大肠埃希菌、金黄色葡萄球菌、单核细胞增生李斯特菌和蜡样芽孢杆菌的相对丰度分别排在物种层面的第3、23、7、121位和第8、5、13和287位。结论北京市零售预包装冷藏膳食存在致病菌污染,单核细胞增生李斯特菌是微生物控制的重点,传统的培养方法可能低估致病菌的污染状况,结合宏基因组测序技术可以更全面的评估微生物污染状况。

关键词：预包装冷藏膳食致病菌污染宏基因组测序

The Ningxia Trade Link

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Beijing Review 2010年第22期53卷 30-31页

作者： LI yuzhu & liu YUNYUN

High-level forum helps strengthen China-Arab trade and economic cooperation Trade deals were plentiful at the first China-Arab States Economic and Trade Forum last month, with over 190 deals on investment

关键词： The Ningxia Trade Link LAS

Structural evolution and zero-field SMM behaviour in ferromagnetically-coupled disk-type Co_(7)clusters bearing exclusively end-on azido bridges

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Chinese Chemical Letters 2024年第8期35卷 567-571页

作者： Yijia Jiao yuzhu Li Yuting Zhou Peipei Cen Yi Ding Yan Guo Xiangyu liu State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China College of Public Health College of Basic Medical ScienceNingxia Medical UniversityYinchuan 750021China

Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like *** resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical *** studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.

关键词： Multinuclear Co^(Ⅱ)-clusters Disk-like motif Structural modulation Ferromagnetic coupling Zero-field SMM

Invisible vapor catalysis in graphene growth by chemical vapor deposition

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Nano Research 2024年第5期17卷 4259-4269页

作者： Xiucai Sun Xiaoting liu Zhongti Sun Xintong Zhang yuzhu Wu Yeshu Zhu Yuqing Song Kaicheng Jia Jincan Zhang Luzhao Sun Wan-Jian Yin Zhongfan liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute(BGI) Beijing 100095China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Department of Engineering University of CambridgeCambridge CB30FAUK College of Energy Soochow Institute for Energy and Materials InnovationS(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China

Vapor catalysis was recently found to play a crucial role in superclean graphene growth via chemical vapor decomposition(CVD).However,knowledge of vapor-phase catalysis is scarce,and several fundamental issues,including vapor compositions and their impact on graphene growth,are ***,by combining density functional theory(DFT)calculations,an ideal gas model,and a designed experiment,we found that the vapor was mainly composed of Cui clusters with tens of *** vapor pressure was estimated to be~10^(-12)-10^(-1)1 bar under normal low-pressure CVD system(LPCVD)conditions for graphene growth,and the exposed surface area of Cui clusters in the vapor was 22-269 times that of the Cu substrate surface,highlighting the importance of vapor *** calculations show Cu clusters,represented by Cu17,have strong capabilities for adsorption,dehydrogenation,and decomposition of *** exhibit an adsorption lifetime and reaction flux six orders of magnitude higher than those on the Cu surface,thus providing a sufficient supply of active C atoms for rapid graphene growth and improving the surface cleanliness of the synthesized *** experimental validation showed that increasing the amount of Cu vapor improved the as-synthesized graphene growth rate and surface *** study provides a comprehensive understanding of vapor catalysis and the fundamental basis of vapor control for superclean graphene rapid growth.

关键词： vapor catalysis graphene growth chemical vapor deposition first-principles calculation

Boron promoted Fe^(3+)/peracetic acid process for sulfamethazine degradation:Efficiency,role of boron,and identification of the reactive species

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Journal of Environmental Sciences 2024年第1期135卷 72-85页

作者： Yanhong Zhang Guangbing liu yuzhu Xue Lichun Fu Yawei Qian Minhui Hou Xiang Li Chen Ling Ying Zhang Yuwei Pan Jiangsu Provincial Key Laboratory of Environmental Engineering Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China School of Iron and Steel Soochow UniversitySuzhou 215000China School of the Environment Nanjing UniversityNanjing 210023China SUMEC Complete Equipment&Engineering Co. LTD.Nanjing 211500China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Environment Key Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China

In this work,boron(B)was used to promote Fe^(3+)/peracetic acid(Fe^(3+)/PAA)for the degradation of sulfamethazine(SMT).An SMT degradation efficiency of 9.1%was observed in the Fe^(3+)/PAA system over 60 min,which was significantly increased to 99.3%in the B/Fe^(3+)/PAA system over 10 *** B/Fe^(3+)/PAA process also exhibited superior resistance to natural substances,excellent adaptability to different harmful substances,and good removal of antibiotics in natural fresh water *** mechanism of action of boron for Fe^(3+)reduction was determined using scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FT-IR)spectroscopy,density functional theory(DFT)calculations,and electrochemical *** dominant role of^(·)OH was confirmed using quenching experiments,electron spin resonance(EPR)spectroscopy,and quantitative *** radicals(R-O^(·))and Fe(IV)also significantly contribute to the removal of *** calculations on the reaction between Fe^(2+)and the PAA were conducted to further determine the contribution from ^(·)OH,R-O^(·),and Fe(IV)from the perspective of thermodynamics and the reaction *** boron dosages,Fe^(3+)dosages,and initial pH values were also investigated in the B/Fe^(3+)/PAA system to study their effect of SMT removal and the production of the reactive ***(IV)production determined the k_(R-O·+Fe(IV))value suggesting that Fe(IV)may play a more important role than R-O^(·).A comparison of the results with other processes has also proved that the procedure described in this study(B/Fe^(3+)/PAA)is an effective method for the degradation of antibiotics.

关键词： Boron Peracetic acid Sulfamethazine DFT Reactive species

有效利用初至信息的偏移距加权地震层析成像方法

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石油物探 2014年第1期53卷 99-105,115页

作者：刘玉柱杨积忠同济大学海洋地质国家重点实验室上海200092 同济大学海洋与地球科学学院上海200092

在基于射线理论的初至波地震走时层析成像方法中,很多因素会影响反演效果,其中观测数据能否有效利用是影响反演结果精度的一个重要因素。数值实验表明,初至层析成像反演表层速度结构时,不同偏移距数据对于提高不同深度反演精度的贡献是... 详细信息

在基于射线理论的初至波地震走时层析成像方法中,很多因素会影响反演效果,其中观测数据能否有效利用是影响反演结果精度的一个重要因素。数值实验表明,初至层析成像反演表层速度结构时,不同偏移距数据对于提高不同深度反演精度的贡献是不同的。根据这一认识,提出了多偏移距(MOR)层析反演策略,以提高表层建模反演的精度;通过理论模型与实际资料测试证实了该策略的有效性。但MOR反演策略实现过程复杂,且只能实现偏移距的离散利用,考虑到多偏移距层析实质上是对观测数据的一种加权实现,进一步提出了利用偏移距构建协方差矩阵的偏移距加权地震层析成像方法。模型数据与实际资料的反演实验结果表明,偏移距加权地震层析成像方法避免了MOR层析过程中的多次嵌套反演,只需一次反演就可以达到连续多偏移距层析策略的反演效果。

关键词：初至波层析成像反演策略偏移距加权协方差矩阵

The Reliabilities of HfO_(2)-Based Ferroelectric Devices under Swift Heavy Ion Irradiation

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IMP & HIRFL Annual Report 2022年第1期 114-115页

作者： Li Zongzhen Jiao Yang Zhao Shiwei liu yuzhu liu Jie 不详

HfO_(2)-based ferroelectric films are considered to be one of the key materials for the development of next generation microelectronic *** to now,HfO_(2)-based FeRAM devices show high immunity to proton and radiation^([1,2]).However,to our best knowledge,the e ects of swift heavy ions(SHIs)on HfO_(2)-based ferroelectric lms were rarely reported and its mechanism is still missing.

关键词： ferroelectric Swift immunity