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Environmental and human health impact assessment of major interior wall decorative materials

Frontiers of Engineering Management 2019年第3期6卷 406-415页

作者： Bingqing ZHANG ruochen zeng Xiaodong LI Department of Construction Management School of Civil EngineeringTsinghua UniversityBeijing 100084China School of Construction Management University of FloridaGainesvilleFL 32611USA

Despite the growing interest in green products in the interior wall decorative material market,knowledge gaps exist because determining which product is more environmental and user friendly than the others is *** work assesses the environmental and human health profiles of interior latex and wallpape匸Two interior latex products of different raw material ratios and one nonwoven wallpaper product are *** environmental impact assessment follows life cycle assessment(LCA)methodology and applies Building Environmental Performance Analysis System(BEPAS).The human health impact is based on impact-pathway chain and is performed using Building Health Impact Analysis System(BHIAS).The assessment scope,associated emissions,and territorial scope of various emissions are defined to facilitate comparison study of interior wall decorative *** impacts are classified into 15 categories belonging to three safeguard areas:ecological environment,natural resources,and human *** impacts of categories are calculated and monetized using willingness to pay(WTP)and disability-adjusted life year(DALY)and summarized as an integrated external cost of environmental and human health *** results reveal that the integrated impact of interior latex is lower than that of non-woven wallpaper,and the interior latex of low quality causes low life cycle integrated *** most impacted categories are global warming,respiratory effects,and water *** of product manufacturing are recognized to promote green product design.

关键词： life cycle assessment human health impact integrated assessment interior wall decorative material green product

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城市轨道交通RAMS技术发展与展望

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施工技术（中英文） 2023年第19期52卷 1-9,16页

作者：曾若辰上海大学悉尼工商学院上海201800

随着我国城市轨道交通的快速发展,RAMS技术将在其中起到重要作用。RAMS从可靠性、维修性、可用性和安全性等4个要素进行定义和计算,详细介绍了城市轨道交通RAMS工作流程,包括RAM和安全两个方面,涵盖了RAM保证计划、分配、分析和跟踪,以... 详细信息

随着我国城市轨道交通的快速发展,RAMS技术将在其中起到重要作用。RAMS从可靠性、维修性、可用性和安全性等4个要素进行定义和计算,详细介绍了城市轨道交通RAMS工作流程,包括RAM和安全两个方面,涵盖了RAM保证计划、分配、分析和跟踪,以及安全保证计划、风险识别、评估和控制等环节;探讨了城市轨道交通RAMS技术的进展,针对传统方法在数据不足、系统复杂性和风险预测方面的挑战,提出了系统关键设备识别、RAMS评估与预测、RCM维修策略优化等研究方向。最后,展望了城市轨道交通RAMS技术的未来发展趋势,包括全生命周期数字孪生、AI辅助运维决策和RAMS标准体系建设等应用与推广,这些发展将为城市轨道交通系统提供更高的可靠性、安全性和运维效率,为行业可持续发展提供支持。

关键词：城市轨道交通可靠性维修性可用性安全性

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基于BP神经网络的财务危机预警模型研究——以宁德时代为例

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内江师范学院学报 2024年第10期39卷 94-100页

作者：曾若辰颜剩勇湖南科技大学商学院湖南湘潭411100

随着新能源产业的发展,近年来锂电池企业成为关注重点.为保障锂电池企业更好地发展,本文以28家锂电池上市企业2018—2022年财务数据为研究对象,利用因子分析法选取其中16个具有代表性的预警指标,构建了BP神经网络模型进行财务危机预警;... 详细信息

随着新能源产业的发展,近年来锂电池企业成为关注重点.为保障锂电池企业更好地发展,本文以28家锂电池上市企业2018—2022年财务数据为研究对象,利用因子分析法选取其中16个具有代表性的预警指标,构建了BP神经网络模型进行财务危机预警;并以锂电池行业巨头企业宁德时代为例,采用功效系数法结合实际情况进行了案例分析.结果表明:本文所构建的锂电池行业BP神经网络财务危机预警模型预测的准确率达82.6%,准确度相对较高,且与具体案例实际情况分析的结果较为吻合,具有较强实用性,可以准确地识别锂电池企业财务危机情况并进行预警.

关键词： BP神经网络宁德时代财务危机预警

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A Deepfake Detection Algorithm Based on Fourier Transform of Biological Signal

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Computers, Materials & Continua 2024年第6期79卷 5295-5312页

作者： Yin Ni Wu zeng Peng Xia Guang Stanley Yang ruochen Tan School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan430023China School of Mathematics and Computer Science Wuhan Polytechnic UniversityWuhan430048China Paul G.Allen School of Computer Science and Engineering University ofWashingtonSeattleWA98195USA School of Computer Science and Engineering University of CaliforniaSanDiegoCA92093USA

Deepfake-generated fake faces,commonly utilized in identity-related activities such as political propaganda,celebrity impersonations,evidence forgery,and familiar fraud,pose new societal *** current deepfake generators strive for high realism in visual effects,they do not replicate biometric signals indicative of cardiac *** this gap,many researchers have developed detection methods focusing on biometric *** methods utilize classification networks to analyze both temporal and spectral domain features of the remote photoplethysmography(rPPG)signal,resulting in high detection ***,in the spectral analysis,existing approaches often only consider the power spectral density and neglect the amplitude spectrum—both crucial for assessing cardiac *** introduce a novel method that extracts rPPG signals from multiple regions of interest through remote photoplethysmography and processes them using Fast Fourier Transform(FFT).The resultant time-frequency domain signal samples are organized into matrices to create Matrix Visualization Heatmaps(MVHM),which are then utilized to train an image classification ***,we explored various combinations of time-frequency domain representations of rPPG signals and the impact of attention *** experimental results show that our algorithm achieves a remarkable detection accuracy of 99.22%in identifying fake videos,significantly outperforming mainstream algorithms and demonstrating the effectiveness of Fourier Transform and attention mechanisms in detecting fake faces.

关键词： Deepfake detector remote photoplethysmography fast fourier transform spatial attention mechanism

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Study on Real-Time Heart Rate Detection Based on Multi-People

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Computer Systems Science & Engineering 2023年第2期44卷 1397-1408页

作者： Qiuyu Hu Wu zeng Yi Sheng Jian Xu Weihua Ou ruochen Tan School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan430000China School of Electronic and Information Engineering Guizhou Normal UniversityGuizhou550000China Interactive Media and Computer Science University of MiamiMiami33124FloridaUSA

Heart rate is an important vital characteristic which indicates physical and mental health *** heart rate measurement instruments require direct contact with the skin which is time-consuming and ***,the study of non-contact heart rate measurement methods is of great *** on the principles of photoelectric volumetric tracing,we use a computer device and camera to capture facial images,accurately detect face regions,and to detect multiple facial images using a multi-target tracking *** after the regional segmentation of the facial image,the signal acquisition of the region of interest is further ***,frequency detection of the collected Photo-plethysmography(PPG)and Electrocardiography(ECG)signals is completed with peak detection,Fourier analysis,and a Waveletﬁ*** experimental results show that the subject’s heart rate can be detected quickly and accurately even when monitoring multiple facial targets simultaneously.

关键词： Face recognition face analysis heart rate detection IPPG signal

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Grazing exclusion promotes soil organic carbon accumulation in Tibetan grasslands with lower temperatures

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生态过程（英文） 2024年第4期13卷 254-264页

作者： Guangru Zhang Xiangping Tan Jinhong He Dengnan Luo Xiang zeng Minqi Liang ruochen Cao Siyuan Peng Pan Li Long Tao Muhammed Mustapha Ibrahim Zhongmin Hu School of Geography South China Normal UniversityGuangzhou 510631China Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of Sciences723 Xingke Rd.Tianhe Dis-trictGuangzhou 510650China Guangzhou Institute of Forestry and Land-scape Architecture Guangzhou Urban Ecosystem National Field StationGuangzhou 510405China Facility of Geographical Science Beijing Normal UniversityBeijing 100875China College of Arts and Sciences Beijing Normal University at ZhuhaiZhuhai 519087China School of Atmospheric Sciences Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon CycleSun Yat-Sen UniversityZhuhai 510245China International Institute for Earth System Sciences Jiangsu Center for Collaborative Innova-tion in Geographical Information Resource Development and ApplicationNanjing UniversityNanjing 210023China Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural ResourcesSchool of Geography and Ocean ScienceNanjing UniversityNanjing 210023China Hainan Baoting Tropical Rainforest Ecosystem Observation and Research Sta-tion School of EcologyHainan University58 Renmin AvenueHaikou 570228China

Background Grazing exclusion is a practical approach to restore vegetation in degraded grasslands and enhance soil organic carbon(SOC)***,the dynamics and drivers of SOC in grasslands after grazing exclusion have not been well documented,especially in ecosystems with cold climates.Methods Here,we established 14 paired treatments(grazing exclusion ***-grazing)along a 600-km transect in the northeastern zone of the Qinghai-Tibet *** six years,we analyzed vegetation biomass dynamics and measured the soil physicochemical properties and organic C concentration across three depths(0-10,10-20,and 20-30 cm).Results Grazing exclusion significantly increased above-and belowground biomass(139.85％and 43.30％,respec-tively),pH(1.38％),total phosphorus(3.29％),nitrate nitrogen(18.03％),and ammonium nitrogen(17.81％),but signifi-cantly decreased soil bulk density(2.43％)and clay content(10.49％),particularly in 0-30 ***,SOC con-centrations positively responded to grazing exclusion(0-10 cm)in 9 of the 14 sites *** effects of grazing exclusion on SOC concentrations were significantly higher in areas with a mean annual temperature(MAT)below 0 ℃ compared to those in sites with a high MAT(＞0 ℃).The SOC concentrations significantly correlated with the mean annual precipitation(MAP)in both treatments,but these correlations diminished with increasing soil *** regression analysis showed that soil chemical properties(e.g.,total nitrogen and phosphorus)positively influenced SOC accumulation,while MAT negatively influenced it after grazing *** analysis further revealed that MAT indirectly regulated SOC dynamics via soil chemical properties.Conclusions Our study highlights that grazing exclusion results in an asynchronous SOC and plant biomass accumu-lation and may be more beneficial for SOC sequestration in Qinghai-Tibet Plateau grasslands with lower ***,humid climates promote SOC concentration in alpine gra

关键词： Grazing exclusion Plant biomass Qinghai-Tibet Plateau Soil carbon storage Soil physicochemical property

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A Novel Nucleobase Modification Strategy for Controlling RNA-Guided Nucleic Acid Cleavage

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CCS Chemistry 2023年第12期5卷 2933-2944页

作者： Huajun Lei ruochen Fan Xiaofang Ye Wei Xiong Shuangyu Cui Tianying zeng Tian Tian Xiang Zhou College of Chemistry and Molecular Sciences Key Laboratory of Biomedical Polymers of Ministry of EducationHubei Province Key Laboratory of Allergy and ImmunologyWuhan UniversityWuhan 430072

Clustered regularly interspaced short palindromic repeat(CRISPR)technologies have opened new scientific avenues widely used in biomedical *** simple and efficient strategies to reversibly control CRISPR are *** contrast to previous methods of attaching molecules to the ribose of guide RNAs(gRNAs),we focused on molecules that can directly react with ***,we developed a new strategy to switch off the CRISPR system by efficiently installing 4-(bromomethyl)phenylboronic acid onto nucleobases in *** can then be activated by hydrogen peroxide(H_(2)O_(2)).Collectively,this work demonstrates boronic acid reversibly modulating CRISPR systems through a H_(2)O_(2)-responsive manner.

关键词： nucleobase modification guide RNA boronic acid H_(2)O_(2)responsive regulatory clustered regularly interspaced short palindromic repeat

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基于感知生成对抗网络的工程地质剖面图生成方法研究

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土木建筑工程信息技术 2024年第6期16卷 7-12页

作者：李彦锦姚德宁覃文波曾若辰华中科技大学国家数字建造技术创新中心武汉430074 华中科技大学土木与水利工程学院武汉430074 武汉地铁集团有限公司武汉430070 上海大学悉尼工商学院上海201800

工程地质剖面图是地下工程不可或缺的重要组成部分,也是施工和运营期间变形监测与安全预警的基础之一。其传统绘制方法不一定能完全反映出地层空间分布的随机性,这对工程实际地质剖面的认知造成了极大不利影响。现有工程地质剖面图的绘... 详细信息

工程地质剖面图是地下工程不可或缺的重要组成部分,也是施工和运营期间变形监测与安全预警的基础之一。其传统绘制方法不一定能完全反映出地层空间分布的随机性,这对工程实际地质剖面的认知造成了极大不利影响。现有工程地质剖面图的绘制一般由工程师将钻孔和实验数据导入对应软件中,借助软件的数学插值方法进行绘图,这一过程很难体现出土壤性质的空间变异性。本研究提出了一种基于感知生成对抗网络的新型工程剖面绘图方法:以真实地铁监测数据为例,构建了输入输出成对数据,通过生成模型自动生成工程地质剖面图。该方法在指定条件下与其他多种相关算法进行对比,均取得了较优的效果,具有一定的实际应用价值。

关键词：地下空间地质条件勘测工程地质剖面图地层空间变异性生成式算法

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Grazing exclusion promotes soil organic carbon accumulation in Tibetan grasslands with lower temperatures

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Ecological Processes 2024年第04期 256-266页

作者： Guangru Zhang Xiangping Tan Jinhong He Dengnan Luo Xiang zeng Minqi Liang ruochen Cao Siyuan Peng Pan Li Long Tao Muhammed Mustapha Ibrahim Zhongmin Hu School of Geography South China Normal University Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou Institute of Forestry and Landscape Architecture Guangzhou Urban Ecosystem National Field Station Facility of Geographical Science Beijing Normal University College of Arts and Sciences Beijing Normal University at Zhuhai School of Atmospheric Sciences Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle Sun Yat-Sen University International Institute for Earth System Sciences Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and ApplicationNanjing University Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources School of Geography and Ocean Science Nanjing University Hainan Baoting Tropical Rainforest Ecosystem Observation and Research Station School of Ecology Hainan University

Background Grazing exclusion is a practical approach to restore vegetation in degraded grasslands and enhance soil organic carbon(SOC) sequestration. However, the dynamics and drivers of SOC in grasslands after grazing exclusion have not been well documented, especially in ecosystems with cold *** Here, we established 14 paired treatments(grazing exclusion vs. free-grazing) along a 600-km transect in the northeastern zone of the Qinghai-Tibet Plateau. After six years, we analyzed vegetation biomass dynamics and measured the soil physicochemical properties and organic C concentration across three depths(0–10, 10–20, and 20–30 cm).Results Grazing exclusion significantly increased above-and belowground biomass(139.85% and 43.30%, respectively), pH(1.38%), total phosphorus(3.29%), nitrate nitrogen(18.03%), and ammonium nitrogen(17.81%), but significantly decreased soil bulk density(2.43%) and clay content(10.49%), particularly in 0–30 cm. Specifically, SOC concentrations positively responded to grazing exclusion(0–10 cm) in 9 of the 14 sites evaluated. The effects of grazing exclusion on SOC concentrations were significantly higher in areas with a mean annual temperature(MAT) below 0 ℃ compared to those in sites with a high MAT(> 0 ℃). The SOC concentrations significantly correlated with the mean annual precipitation(MAP) in both treatments, but these correlations diminished with increasing soil depth. Ridge regression analysis showed that soil chemical properties(e.g., total nitrogen and phosphorus) positively influenced SOC accumulation, while MAT negatively influenced it after grazing exclusion. Path analysis further revealed that MAT indirectly regulated SOC dynamics via soil chemical *** Our study highlights that grazing exclusion results in an asynchronous SOC and plant biomass accumulation and may be more beneficial for SOC sequestration in Qinghai-Tibet Plateau grasslands with lower temperatures. Also, humid climates promote SOC c

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一种基于白噪声的多点激励随机信号生成方法

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南京航空航天大学学报 2017年第6期49卷 839-844页

作者：张步云陈怀海汪若尘王勇曾发林江苏大学汽车工程研究院镇江212013 南京航空航天大学振动工程研究所南京210016

为提高多输入多输出(Multiple input multiple output,MIMO)线性随机振动试验系统中具有相关特性的多路驱动信号生成精度,基于驱动谱非负定Hermite特性及矩阵分解理论提出了一种CD(Cholesky decomposition)白噪声滤波信号生成方法。构... 详细信息

为提高多输入多输出(Multiple input multiple output,MIMO)线性随机振动试验系统中具有相关特性的多路驱动信号生成精度,基于驱动谱非负定Hermite特性及矩阵分解理论提出了一种CD(Cholesky decomposition)白噪声滤波信号生成方法。构造具有特定"频响特性"的传递系统,将一系列独立白噪声通过该系统得到具有预期相干特性、相位差以及自谱的平稳随机信号。建立悬臂梁两输入两输出线性振动系统仿真模型,将传统傅里叶逆变换时频转换方法与CD滤波法生成的驱动信号进行对比分析。结果表明新方法精度与参考值误差不足1dB。两轴振动试验验证结果表明,应用CD法既满足工程实际标准需求,又为振动环境试验提供理论依据。

关键词：驱动谱白噪声随机振动 Cholesky分解频响模型

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