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Emission characteristics and probabilistic health risk of volatile organic compounds from leather sofa

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Journal of Environmental Sciences 2025年第2期148卷 79-87页

作者： Chuanhui Mu Yuling tang Zhaohui Yang jianfei Zhou Bi shi National Engineering Laboratory for Clean Technology of Leather Manufacture Sichuan UniversityChengdu 610065China Research Institute of Leather and Footwear Industry of Wenzhou Wenzhou 325088China Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan UniversityChengdu 610065China

Furniture is identified as a vital volatile organic compound(VOC)emission source in the indoor *** has become the most common raw and auxiliary fabric material for upholstered furniture,particularly with extensive consumption in sofas,due to its abundant resources and efficient *** being widely traded across the world,little research has been conducted on the VOCs released by leathermaterials and their health risk assessment in the indoor ***,this study investigated the VOC emissions of leather with different grades and the health risk of the inhalation *** on the ultra-fast gas phase electronic nose(EN)and GC-FID/Qtof,the substantial emissions of aliphatic aldehyde ketones(Aks),particularly hexanal,appear to be the cause of off-flavor in medium and low grade(MG and LG)sofa *** health risk assessment indicated that leather materials barely pose non-carcinogenic and carcinogenic effects to *** the abundance of VOC sources and the accumulation of health risks in the indoor environment,more stringent specifications concerning qualitative and quantitative content should be extended to provide VOC treatment basic for the manufacturing industry and obtain better indoor air quality.

关键词： Indoor environment Leather Volatile organic compounds(VOCs) Health risk assessment

Prediction and optimization of flue pressure in sintering process based on SHAP

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue tang Mansheng Chu Quan shi Zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

Controlling Hopf bifurcation of a new modified hyperchaotic L system

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Controlling Hopf bifurcation of a new modified hyperchaotic ...

Hopf Bifurcation Analysis in a new Chaotic System

第十五届全国非线性振动暨第十二届全国非线性动力学和运动稳定性学术会议

作者：蔡萍 jia-shi tang Zhen-Bo Li College of Mechanical and Vehicle Engineering Hunan University

In this paper,the hybrid control is applied to Hopf bifurcation control of a new modified4 D hyperchaotic L system of the form x = a(y-x + yz)y =-xz + by + u z = xy-cz u =-kx(1) where x,y,z,u are state variables,a,b,c,k are real ***(1) has a hyperchaotic attractor when a = 35,b = 14,c = 3,k = ***,system(1) has only one isolated equilibrium 0(0,0,0,0) when k ≠ *** controlled system is x = αa(y- x + yz) +(1- α)xy = α(-xz + by + u) +(1-α)yz = α(xy- cz) +(1- α)zu = α(-kx) +(1- α)u (2) where α =(α,α,α,α)∈R is a control *** k as the Hopf bifurcation parameter,then system(2) exhibits Hopf bifurcation at 0(0,0,0,0).Parameter αcan change the Hopf bifurcation value,so the control strategy can realize to delay Hopf ***,by applying the normal form theory,the stability of the bifurcation is *** simulation results are given to support the theoretical analysis.

关键词： Hopf bifurcation Hybrid control Normal form Stability Limit cycle

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Hopf Bifurcation Analysis in a new Chaotic System

Research on a Product Information Management System Facing Remanufacture Engineering

第十五届全国非线性振动暨第十二届全国非线性动力学和运动稳定性学术会议

作者：蔡萍 jia-shi tang Zhen-Bo Li College of Mechanical and Vehicle Engineering Hunan University

In this paper,Hopf bifurcation of a new system is *** new chaotic system is described by {=α(z-x)=bx-dxz=kxy-cy-gz (1) where x,y,z are the state variables,a,b,c,d,k,g are real *** strange chaotic attractor of the new chaotic system is shown with the help of the maximum Lyapunov ***(1) is equivalent to{x=α(z-x) y=b’x-x z=xy-c’y-gz,(2)under the linear transformation of coordinates x=(kd)x,y=ky,z=(kd)z,where b’ = b(k/d),c’ = c(d/k).For simplicity,we will still represent the two parameters as b,c in the following ***(2) has two equilibrium points:E(0,0,0) and E(b,gb/(b-c),b).The existences of Hopf bifurcation at the two equilibriums are obtained by characteristic equations and corresponding dynamics of the system are studied by means of the first Lyapunov ***,the stable periodic orbits are *** simulations are carried out to illustrate the main theoretical results.

关键词： New chaotic system Hopf bifurcation The first Lyapunov coefficient Limit cycle

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International Journal of Plant Engineering and Management 2007年第1期12卷 55-60页

作者： HOU Du-cheng YU Kai-chao jia jian-shi tang Xiu-ying School of Mechanical and Electrical Engineering Kunming University of Science and Technology Kunming 650093 P. R. China

Remanufacture Engineering is an important characteristic and development trend of a manufacturing system in the 21st Century, and product information management is very important to Remanufacture Engineering. In this paper, we first compared traditional manufacturing and remanufacturing. Then, according to the features of Remanufacture Engineering, we analyzed the request of product information management system facing Remanufacture Engineering, and designed the system module. Finally, we built a kind of system structure of product information management facing Remanufacture Engineering and gave realization methods based on Web.

关键词： management system product information remanufacture engineering

Mesoscopic fracture damage evolution and fractal damage constitutive model of heat-treated red sandstone under direct tensile impact loadings

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Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 323-340页

作者： shi Liu Yu jia Yue Zhai Shaoxu Hao School of Mechanics and Construction Engineering Jinan UniversityGuangzhou510632China School of Geology Engineering and Geomatics Chang'an UniversityXi'an710064China

Understanding the mesoscopic tensile fracture damage of rock is the basis of evaluating the deterioration process of mechanical properties of heat-damaged rock. For this, tensile tests of rocks under high-temperature treatment were conducted with a ϕ75 mm split Hopkinson tension bar (SHTB) to investigate the mesoscopic fracture and damage properties of rock. An improved scanning electron microscopy (SEM) experimental method was used to analyze the tensile fracture surfaces of rock samples. Qualitative and quantitative analyses were performed to assess evolution of mesoscopic damage of heat-damaged rock under tensile loading. A constitutive model describing the mesoscopic fractal damage under thermo-mechanical coupling was established. The results showed that the high temperatures significantly reduced the tensile strength and fracture surface roughness of the red sandstone. The three-dimensional (3D) reconstruction of the fracture surface of the samples that experienced tensile failure at 900 °C showed a flat surface. The standard deviation of elevation and slope angle of specimen fracture surface first increased and then decreased with increasing temperature. The threshold for brittle fracture of the heat-damaged red sandstone specimens was 600 °C. Beyond this threshold temperature, local ductile fracture occurred, resulting in plastic deformation of the fracture surface during tensile fracturing. With increase of temperature, the internal meso-structure of samples was strengthened slightly at first and then deteriorated gradually, which was consistent with the change of macroscopic mechanical properties of red sandstone. The mesoscopic characteristics, such as the number, mean side length, maximum area, porosity, and fractal dimension of crack, exhibited an initial decline, followed by a gradual increase. The development of microcracks in samples had significant influence on mesoscopic fractal dimension. The mesoscopic fractal characteristics were used to establis

关键词： High temperature rock mechanics Dynamic direct tension Red sandstone Mesoscopic fracture mechanism Fractal damage constitutive model

Association between age at diagnosis of diabetes and ocular disease:Insights from a recent article

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World Journal of Diabetes 2025年第1期16卷 211-216页

作者： shi-Qi Liu Dong Wang Cheng-Chun tang Department of Cardiology Zhongda HospitalSoutheast UniversityNanjing 210009Jiangsu ProvinceChina School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina

In this article,we discuss Ye et al's recent article on the association between age at diabetes diagnosis and subsequent risk of age-related ocular *** study,which utilized United Kingdom Biobank data,highlighted a strong link between early diabetes onset and major eye conditions,such as cataracts,glaucoma,agerelated macular degeneration,and vision loss,independent of glycemic control and disease *** finding challenges the previous belief that diabetic eye disease primarily correlates with *** lifestyles evolve and the age of diabetes diagnosis decreases,understanding this relationship may reveal the complex pathogenesis underlying diabetes-related *** editorial summarizes potential mechanisms connecting the age of diabetes onset with four types of ocular diseases,emphasizing the significance of early diagnosis.

关键词： Diabetes Age at diagnosis Cataract Glaucoma Age-related macular disease Vision acuity

Accelerating homogenization kinetics and enhancing hot-workability of as-cast nickel-based superalloy via prior hot-deformation

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Journal of Iron and Steel Research International 2025年第1期32卷 215-226页

作者： jia-jun Chen Yang Zhou Hao-ran Han Xian-guang Zhang Goro Miyamoto Ping-mei tang Dong-ping Xiao jian-hui Fu Peng shi Yi-wu Pei jian Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Chengdu Advanced Metal Materials Industrial Technology Institute Co. Ltd.Chengdu 610300SichuanChina Institute for Materials Research Tohoku UniversitySendai 980-8577Aoba-KuJapan

Enhancing homogenization efficiency and hot-workability is the key issue for wrought superalloys in the industry.A novel approach for simultaneous accelerating the homogenization kinetics and improving hot-workability via a simple way of prior hot-deformation was proposed,which was not widely accepted for wrought *** homogenization efficiency is increased by 40%-70%via performing 10%-20%prior *** theoretical and experimental analyses revealed that the increment in homogenization efficiency is mainly attributed to the decrease in interdendritic-segregation spacing,and thus the necessary diffusion distance,rather than that of *** addition,dynamic and static recrystallizations occurred during the prior hot-deformation and diffusion-annealing processes,and the grains were significantly refined even after the ***,the size of the precipitates was refined as *** enhanced the hot-workability of the homogenized ingot for the subsequent cogging process.

关键词： Nickel-based superalloy Homogenization kinetics Prior hot-deformation Grain size Hot workability

4-Nitrophenol at environmentally relevant concentrations mediates reproductive toxicity in Caenorhabditis elegans via metabolic disorders-induced estrogen signaling pathway

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Journal of Environmental Sciences 2025年第1期147卷 244-258页

作者： jia Wang Jiechen Yin Danhong Peng Xiaoqian Zhang Zhouhong shi Weixi Li Yingchi shi Mingjun Sun Nan jiang Beijing Cheng Xingchen Meng Ran Liu Key Laboratory of Environmental Medicine Engineering Ministry of EducationSchool of Public HealthSoutheast UniversityNanjing 210009China Department of Obstetrics and Gynecology Zhongda HospitalSchool of MedicineSoutheast UniversityNanjing 210009China Department of Obstetrics and Gynecology The Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhou Municipal HospitalGusu SchoolNanjing Medical UniversitySuzhouJiangsu 215002China

4-Nitrophenol(4-NP),as a toxic and refractory pollutant,has generated significant concern due to its adverse ***,the potential toxic effects andmechanism remained *** this study,the reproduction,development,locomotion and reactive oxygen species(ROS)production of Caenorhabditis elegans were investigated to evaluate the 4-NP *** used metabolomics to assess the potential damage *** role of metabolites in mediating the relationship between 4-NP and phenotypes was examined by correlation and mediation analysis.4-NP(8 ng/L and 8μg/L)caused significant reduction of brood size,ovulation rate,total germ cells numbers,head thrashes and body bends,and an increase in ***,the oosperm numbers in uterus,body length and body width were decreased in 8μg/***,36 differential metabolites were enriched in the significant metabolic pathways,including lysine biosynthesis,β-alanine metabolism,tryptophan metabolism,pentose phosphate pathway,pentose and glucuronate interconversions,amino sugar and nucleotide sugar metabolism,starch and sucrose metabolism,galactose metabolism,propanoate metabolism,glycerolipid metabolism,and estrogen signaling *** mechanism of 4-NP toxicity was that oxidative stress caused by the perturbation of amino acid,which had effects on energy metabolism through disturbing carbohydrate and lipid metabolism,and finally affected the estrogen signaling pathway to exert toxic ***,correlation and mediation analysis showed glycerol-3P,glucosamine-6P,glucosamine-1P,UDP-galactose,L-aspartic acid,and uracilwere potential markers for the reproduction and glucose-1,6P2 for developmental *** results provided insight into the pathways involved in the toxic effects caused by 4-NP and developed potential biomarkers to evaluate 4-NP toxicity.

关键词： 4-Nitrophenol Caenorhabditis elegans Metabolomics Pathway analysis