作者：
Xiao, Jun;Gong, Yanping;Li, Jian;Javeed, Sohail Ahmad;Peng, Yao
期刊：
Heliyon,2023年9(8):e18347 ISSN：2405-8440
通讯作者：
Javeed, SA;Li, J
作者机构：
[Xiao, Jun; Gong, Yanping] Cent South Univ, Sch Business, Changsha 410083, Peoples R China.;[Xiao, Jun; Javeed, Sohail Ahmad] Hunan City Univ, Sch Management, Yiyang 413000, Peoples R China.;[Li, Jian] Anhui Univ, Sch Business, Hefei 230601, Peoples R China.;[Peng, Yao] CITIC Bank Credit Card Ctr, Shenzhen 518000, Peoples R China.
通讯机构：
[Li, J ] A;[Javeed, SA ] H;Hunan City Univ, Sch Management, Yiyang 413000, Peoples R China.;Anhui Univ, Sch Business, Hefei 230601, Peoples R China.
关键词：
Work-family conflict;Self-control;Hedonic products;Utilitarian products;Frugality;The strength model of self-control
摘要：
Despite the high incidence of work-family conflict, there has been a lack of research that investigates its impact on employee behavior, particularly concerning their consumption behavior, which has received inadequate attention. The present study draws on the strength model of self-control and investigates the influence of individuals' work-family conflict on their preferences for hedonic and utilitarian products via self-control, with frugality acting as a moderator of this relationship. This study gathered data from 502 full-time employees with families in China. Results from the moderated mediating model analysis conducted using the SPSS-PROCESS macro revealed that work-family conflict was positively associated with a preference for hedonic products and negatively associated with a preference for utilitarian products. Self-control was found to mediate the relationship between work-family conflict and product preferences, with a weaker mediating effect observed for individuals with higher levels of frugality in the case of utilitarian products. The findings of this study contribute to the literature on work-family conflict and have implications for organizations and merchants in understanding and addressing the impact of work-family conflict on employee consumption behavior. Specifically, this study provides insight into how organizations can better manage work-family conflict and how merchants can make more informed marketing decisions for hedonic and utilitarian products.
摘要：
Hemicyanine dyes, with a tunable optical site and high wavelength tailorability, are of significant importance in the fields of sensing and diagnosis. Following the discovery of the near-infrared (NIR) (650–900 nm) fluorescent dyes Changsha (CS) and Huda (HD) by our group, remarkable progress has been made in the development of hemicyanine-based probes for in vivo imaging and detecting. In this review, we summarize the key contributions made by our group in developing long-wavelength (650–1700 nm) hemicyanines and utilizing them to construct functional probes. Finally, potential drawbacks and future prospects of hemicyanine dyes/probes are discussed.
1 Introduction
2 Changsha (CS) Dyes
3 Huda (HD) Dyes
4 Construction of Hemicyanine Fluorophores in the NIR-II Region
5 Summary and Outlook
摘要：
The heterogeneous Fenton-like systems induced by Fe-containing minerals have been largely applied for the degradation of organic pollutants. However, few studies have been conducted on biochar (BC) as an additive to Fenton-like systems mediated by iron-containing minerals. In this study, the addition of BC prepared at different temperatures was found to significantly enhance the degradation of contaminants in the tourmaline-mediated Fenton-like system (TM/H(2)O(2)) using Rhodamine B (RhB) as the target contaminant. Furthermore, the hydrochloric acid-modified BC prepared at 700°C (BC700(HCl)) could achieve complete degradation of high concentrations of RhB in the BC700(HCl)/TM/H(2)O(2) system. Free radical quenching experiments showed that TM/H(2)O(2) system removed contaminants mainly mediated by the free radical pathway. After adding BC, the removal of contaminants is mainly mediated by the non-free radical pathway in BC700(HCl)/TM/H(2)O(2) system which was confirmed by the Electron paramagnetic resonance (EPR) experiments and electrochemical impedance spectroscopy (EIS). In addition, BC700(HCl) had broad feasibility in the degradation of other organic pollutants (Methylene Blue (MB) 100%, Methyl Orange (MO) 100%, and tetracycline (TC) 91.47%) in the tourmaline-mediated Fenton-like system. Possible pathways for the degradation of RhB by the BC700(HCl)/TM/H(2)O(2) system were also proposed.
期刊：
FRONTIERS IN EARTH SCIENCE,2023年11:1112772 ISSN：2296-6463
通讯作者：
Gao, H.
作者机构：
[Li, Ping] Tibet Agr & Anim Husb Univ, Coll Resources & Environm, Linzhi, Peoples R China.;[Gao, Hongshan; Yan, Tianqi] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Peoples R China.;[Li, Zongmeng] Xinyang Normal Univ, Sch Geog Sci, Xinyang, Peoples R China.;[Wu, Yajie] Wuwei 1 Middle Sch, Wuwei, Peoples R China.;[Liu, Fenliang] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang, Peoples R China.
通讯机构：
[Gao, H.] K;Key Laboratory of Western China’s Environmental Systems (Ministry of Education), China
关键词：
downstream fining;gravel-sand transition;median grain size;river sediment;Shiyang River
摘要：
The grain size composition and distribution of river sediments are important for understanding regional geomorphological evolution, source-sink processes and drainage ecology. The Shiyang River basin, an inland river system in northwestern China, provides an environmental context within which to investigate the relationship between sediment particle size and environmental factors. Based on the analysis of the grain size characteristics of modern riverbed sediments, basin geomorphological parameters and lithology, it is found that the median grain size (Md) of river sediments shows a decrease trend from upstream to downstream in the basin. One of the tributaries named the Jinta River shows an obvious downstream fining trend (exponentially decreasing) of Md, which is related to the old geomorphological development stages and relatively homogeneous lithology in the basin. The downstream fining trend of Md along the Xiying River, another tributary, shows complex fluctuations, which might be affected by the tectonically active, young geomorphic development stage, complex lithology of the basin, and the sediment confluence of tributaries. The gravel-sand transition zone occurs in the plain section of the river about 28 km out of the mountain, which is related to the combination of regional geomorphological features, river morphology and hydraulic sorting.
摘要：
Super-hard abrasive grinding is considered to be the main approach to realize precision and ultra-precision machining of difficult-to-machine materials such as cemented carbide, engineering ceramics, titanium alloys and superalloy materials encountered. However, heavy grinding force, high grinding temperature and poor surface integrity are prone to be encountered in conventional negative rake angle grinding of difficult-to-machine materials. In response to these problems, a novel concept of positive rake angle grinding is first proposed and an abrasive grain regularly arranged binder-less polycrystalline diamond face grinding wheel with positive rake angle has been designed and fabricated by femtosecond laser ablation. To evaluate the grinding performance of the face grinding wheel with positive rake angle, grinding experiments of YG8 cemented carbide are conducted and compared with the traditional electroplated diamond grinding tool with equivalent abrasive grain dimension and distribution. The results show that compared with the conventional negative rake angle grinding, the normal and tangential forces in positive rake angle face grinding are reduced by 30.3 % similar to 36.4 % and 21.1 % similar to 29.3 %, respectively, and the ratio of normal to tangential force is reduced by 12.6 % similar to 20.3 %. The surface roughness and average depth of subsurface metamorphic layer are also significantly smaller. The laser fabricated polycrystalline diamond face grinding wheel also has better wear resistance in the grinding of cemented carbide. Therefore, it can be concluded that better ground surface quality is obtained by the novel grinding wheel with positive rake angle. The innovative grinding method can fill the research gap on the grinding mechanism of positive rake angle grinding and further enrich the grinding theory of difficult-to-machine materials.
期刊：
Construction and Building Materials,2023年376:131077 ISSN：0950-0618
通讯作者：
Yiming Yang<&wdkj&>Huang Tang
作者机构：
[Tang, Huang; Yang, Yiming] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.;[Peng, Jianxin; Yang, Yiming] Minist Educ, Key Lab Safety Control Bridge Engn, Changsha 410114, Hunan, Peoples R China.;[Yang, Yiming] State Key Lab Performance Monitoring & Protecting, Nanchang 330096, Jiangxi, Peoples R China.;[Yang, Yiming] Hunan Engn Res Ctr Dev & Applicat Ceramsite Concre, Yiyang 413000, Hunan, Peoples R China.;[Liu, Zhanghong] Jiangxi Ganyue Expressway Co Ltd, Nanchang 330096, Jiangxi, Peoples R China.
通讯机构：
[Yiming Yang; Huang Tang] S;School of Civil Engineering, Hunan City University, Yiyang, Hunan 413000, China<&wdkj&>Key Laboratory of Safety Control of Bridge Engineering, Ministry of Education, Changsha, Hunan 410114, China<&wdkj&>State Key Laboratory for Performance Monitoring and Protecting of Rail Transit Infrastructure, Nanchang, Jiangxi 330096, China<&wdkj&>Hunan Engineering Research Center of Development and Application of Ceramsite Concrete Technology, Yiyang, Hunan 413000, China<&wdkj&>School of Civil Engineering, Hunan City University, Yiyang, Hunan 413000, China
摘要：
Reasonable assessment of the failure probability caused by long-term deflection is essential to ensure the service performance of low shrinkage-creep concrete (LSCC) structures. In this paper, the shrinkage and creep models applicable to LSCC are proposed and verified by comparing their results with the experimental data. Then, the non-stationary evolution models of uncertainties of concrete creep and shrinkage are developed. Finally, a long-term deflection-based assessment method of failure probability of LSCC structures is also proposed considering the effect of non-stationary evolution of creep and shrinkage uncertainties. The case analysis results show that ignoring the effect of the non-stationary evolution of creep and shrinkage uncertainties overestimates the long-term deflection, and the deviation in this case study is 10.13%. Compared with the uncertainty of creep, the cumulative failure probability of the case structure is more sensitive to the non-stationary evolution of shrinkage uncertainty. The use of LSCC can greatly reduce the cumulative failure probability of concrete structures caused by excessive long-term deflection. Additionally, the cumulative failure probability of concrete structures is greatly underestimated by using the traditional characteristic parameters of uncertainties of concrete creep and shrinkage.
作者机构：
[Tang, Yong; Javeed, Sohail Ahmad] Hunan City Univ, Management Sch, Yiyang, Peoples R China.
通讯机构：
[Javeed, SA ] H;Hunan City Univ, Management Sch, Yiyang, Peoples R China.
摘要：
From the facts that numerous regions with initially similar economic conditions end up with different levels of entrepreneurial agglomeration, this paper constructs a model assuming that the sequential entrants make their career choices based on existing entrepreneurial ratio and describing the dynamics of entrepreneurial agglomeration formation. After mathematical analysis and numerical simulation using NetLogo, it is found that under social selection, a nonlinear Polya process with self-reinforcing and path-dependency characters will emerge, and the repeated entrants' career choices will lead to the agglomeration of entrepreneurship; the agent's risk compensation value, the initial population of agents, the number of role models in the early stage and the initial entrepreneurial ratio are determinants to the formation of entrepreneurial agglomeration. The findings confirm that entrepreneurship has "memory" and the entrepreneurial history could have influence on the future. In order to forge the entrepreneurial agglomeration, our suggestions include exerting influence on the determinants from an early age, and improving the individual's risk-taking abilities.
作者机构：
[Liang, Xiaoqiang; Yang, Xian; Hu, Da; Li, Yongsuo; Hu, D] Hunan City Univ, Hunan Engn Res Ctr Struct Safety & Disaster Preven, Yiyang 413000, Peoples R China.;[Yi, Shun; Liang, Xiaoqiang; Yang, Xian; Hu, Da; Hu, Yongjia; Hu, D] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;[Hu, Da; Hu, D] Power China Zhongnan Engn Co Ltd, Hunan Prov Key Lab Key Technol Hydropower Dev, Changsha 410014, Peoples R China.
通讯机构：
[Hu, D ] H;Hunan City Univ, Hunan Engn Res Ctr Struct Safety & Disaster Preven, Yiyang 413000, Peoples R China.;Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;Power China Zhongnan Engn Co Ltd, Hunan Prov Key Lab Key Technol Hydropower Dev, Changsha 410014, Peoples R China.
摘要：
To provide theoretical support for the safety control of rectangular pipe jacking tunnels crossing an existing expressway, a method for predicting the surface settlement of a rectangular pipe jacking tunnel is proposed in this study. Therefore, based on the high approximation of the BP neural network to any function under the multiparameter input, the PSO-BP mixed prediction model of the ground subsidence of the ultrashallow buried large section rectangular pipe jacking tunnel is established by taking into account the adaptive mutation method, adopting the improved particle swarm optimization (IPSO) algorithm with adaptive inertia weight and mutation particles in the later stage to determine the optimal hyperparameters of the prediction model. Through the case study of an ultrashallow large cross-section rectangular pipe jacking tunnel, this algorithm is compared with the traditional algorithm and combined with field monitoring data for analysis and prediction. The prediction results show that compared with the traditional BP neural network prediction model, AWPSO-BP model and PWPSO-BP model, the improved PSO-BP mixed prediction model shows a more stable prediction effect when the change in surface subsidence is gentle and the concavity and convexity are large. The predicted subsidence value is close to the actual value, and the accuracy and robustness of the prediction are significantly improved.
摘要：
It is important to capture passengers’ public transit behavior and their mobility to create profiles, which are critical for analyzing human activities, understanding the social and economic structure of cities, improving public transportation, assisting urban planning, and promoting smart cities. In this paper, we develop a generative adversarial machine learning network to characterize the temporal and spatial mobility behavior of public transit passengers, based on massive smart card data and road network data. The Apriori algorithm is extended with spatio-temporal constraints to extract frequent transit mobility patterns of individual passengers based on a reconstructed personal trip dataset. This individual-level pattern information is used to construct personalized feature vectors. For regular and frequent public transit passengers, we identify similar transit mobility groups using spatio-temporal constraints to construct a group feature vector. We develop a generative adversarial network to embed public transit mobility of passengers. The proposed model’s generator consists of an auto-encoder, which extracts a low-dimensional and compact representation of passenger behavior, and a pre-trained sub-generator containing generalization features of public transit passengers. Shenzhen City is taken as the study area in this paper, and experiments were carried out based on smart card data, road network data, and bus GPS data. Clustering analysis of embedding vector representation and estimation of the top K transit destinations were conducted, verifying that the proposed method can profile passenger transit mobility in a comprehensive and compact manner.
作者机构：
[Yan, Rian] Hunan City Univ, Sch Math & Comp Sci, Yiyang 413000, Peoples R China.;[Zhao, Yige] Univ Jinan, Sch Math Sci, Jinan 250022, Peoples R China.
通讯机构：
[Zhao, YG ] U;[Yan, R ] H;Hunan City Univ, Sch Math & Comp Sci, Yiyang 413000, Peoples R China.;Univ Jinan, Sch Math Sci, Jinan 250022, Peoples R China.
摘要：
In this paper, a class of nonlinear fractional differential equations with periodic boundary condition is investigated. Although the nonlinearity of the equation and the Green's function are sign-changing, the results of the existence and nonexistence of positive solutions are obtained by using the Schaefer's fixed-point theorem. Finally, two examples are given to illustrate the main results.
作者机构：
[Zhao, Yujia; Wang, Dayong; Jiang, Hao; Li, Guangyao; Cui, Junjia; Chen, Chang] Hunan Univ, State Key Lab Adv Design & Mfg Technol Vehicle, Changsha 410082, Peoples R China.;[Chen, Chang] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413000, Peoples R China.;[Li, Guangyao] Shenzhen Res Inst Natl Engn Lab Elect Vehicles, Shenzhen Automot Res Inst, Shenzhen 518118, Peoples R China.
通讯机构：
[Jiang, H ] H;Hunan Univ, State Key Lab Adv Design & Mfg Technol Vehicle, Changsha 410082, Peoples R China.
关键词：
joining by electromagnetic flanging;aluminum alloy;steel;mechanical property;morphology
摘要：
A structure for joining thin-walled 6061-T6 aluminum alloy tube (outer tube) and Q195 steel tube (inner tube) by electromagnetic flanging process was proposed. The formation process, mechanical properties, failure modes, and morphology of the joint were investigated. The results showed that the outer tube impacted the inner tube, the flanges of the prefabricated holes on the outer tube were embedded into the prefabricated holes of the inner tube under the action of Lorentz force, and thus the mechanical locking joint was obtained. There were two tensile failure modes for the joints: Pull-out and fracture. Specifically, when the discharge energy was relatively high, the failure mode changed from pull-out to fracture. Combining the results of tensile tests and morphology observations, the maximum loads of the joints increased with the discharge energy. However, excessive discharge energy would lead to the brittle fracture of the inner tube, which was not beneficial to the service. Better discharge energy and the maximum load of the joint at this discharge energy were obtained.
摘要：
The vacuum preloading method effectively strengthens soft soil foundations with vertical drainage, which produces a smear effect when laying sand drains. Meanwhile, the seepage of pore water and soil deformation during consolidation exhibit nonlinear characteristics. Therefore, based on Gibson's 1D large-strain consolidation theory, this paper developed a more generalized large-strain radical consolidation model of sand-drained soft foundations under free-strain assumptions. In this system, the double logarithmic compression permeability relationships for soft soils with large-strain properties, the variation in the radical permeability coefficient in the smear zone, and the effect of the non-Darcy flow were all included. Then, the partial differential control equations were numerically solved by the finite difference method and validated with existing radical consolidation test results and derived analytical solutions. Finally, the influences of relevant model parameters on consolidation are discussed. The analysis shows that the greater the maximum dimensionless vacuum negative pressure P0, the faster the consolidation rate of sand-drained foundations. Meanwhile, the decrease in the negative pressure transfer coefficient k1 will result in a decreasing final settlement amount. Moreover, the consolidation rate of sand-drained foundations is slower considering the non-Darcy flow, but the final settlement is unaffected.
摘要：
In the past ten years, networking experts have been more concerned about the rising energy consumption of communication networks. The software-defined networks approach is a way to make diverse and complicated network topologies simpler, more manageable, more adaptable, and more effective, including wireless body area networks. In order to streamline network administration, save operational costs, and promote innovation, software-defined networks are emerging as a new networking architecture that separates the data plane from the control plane. However, despite the importance of this issue, so far, no bibliometric study has been done on this issue. Hence, this study aims to use methods drawn from nature to optimize power usage in software-defined networks. Additionally, a thorough and original categorization of energy-efficient solutions has been offered. During the bibliographic review, the sections of interest of researchers and some bibliographic information in the form of statistical information are expressed. Therefore, searching and selecting relevant keywords are done using the VOSviewer tool. The data is extracted from valid databases. Guidelines for future research on software-defined networks are derived based on the existing research projects' findings and the gaps and constraints that have been found. The results showed that the algorithms inspired by nature were successful in striking a balance among resource usage, energy consumption, and network performance.
期刊：
Energy Science & Engineering,2023年11(9):3185-3203 ISSN：2050-0505
通讯作者：
Wang, G
作者机构：
[Liu, Ronghua; Chen, Yong; Wang, Pengfei] Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan, Hunan, Peoples R China.;[Liu, Ronghua; Chen, Yong; Wang, Pengfei] Work Safety Key Lab Prevent & Control Gas & Roof D, Xiangtan, Hunan, Peoples R China.;[Wu, Jiaokun; Chen, Yong] Natl Key Lab Gas Disaster Detecting Preventing & E, Chongqing, Peoples R China.;[Wu, Jiaokun; Chen, Yong] China Coal Technol Engn Grp Chongqing Res Inst, Chongqing, Peoples R China.;[Wang, Gang; Chen, Yong] Shandong Univ Sci & Technol, State Key Lab Strata Intelligent Control & Green M, Qingdao, Peoples R China.
通讯机构：
[Wang, G ] S;Shandong Univ Sci & Technol, State Key Lab Strata Intelligent Control & Green M, 579, Qianwangang Rd, Qingdao 266590, Shandong, Peoples R China.;Shandong Univ Sci & Technol, Minist Sci & Technol, 579, Qianwangang Rd, Qingdao 266590, Shandong, Peoples R China.
关键词：
degree of metamorphism;gas desorption;pore volume;primary coal;specific surface area
摘要：
Exploring the pore and gas desorption characteristics of primary coal with different degrees of metamorphism. Abstract Pore difference characteristics and adsorption/desorption experiments of primary coal with different degrees were explored to study the characteristics of pore structure and gas desorption. The results show that the pore volume increases with the increase in the degree of metamorphism. In primary coal with different degrees of metamorphism, the distribution of micropores, small pores, and medium‐sized pores (by volume) is WY < PM < CY. The distribution of large pore volume and visible pore volume was WY > PM > CY. According to the pore volume distribution law of different metamorphic primary coals, the average pore diameters of WY, PM, and CY were 68.40, 45.60, and 30.50 nm, respectively. The porosity and specific surface area of primary coal with different degrees of metamorphism show a distribution pattern such that WY > PM > CY. For large pore and visible pore, the pore volumes of WY, PM, and CY coal were 0.0785, 0.0587, and 0.0300 mL/g, respectively, and the proportions were 81.86%, 74.49%, and 55.25%, respectively. The porosity of WY, PM, and CY were 11.57%, 9.03%, and 6.57%, respectively, and the specific surface areas were 6.917, 5.826, and 5.611 cm3/g. According to the desorption characteristics of coal bodies with different metamorphic degrees at different time nodes found that the gas desorption at different time nodes shows similar changes under the same adsorption equilibrium pressure. The higher the degree of coal metamorphism, the greater the amount of gas desorption, and the faster the desorption amplitude. The desorption intensity of WY coal is significantly higher than that of PM and CY coal with the increase of desorption time which also verifies the measurement results of pore structure and adsorption constant.
期刊：
Journal of Bridge Engineering,2023年28(2):04022147 ISSN：1084-0702
通讯作者：
Zhouquan Feng
作者机构：
[Chen, Zhengqing; Huang, Guoping; Hua, Xugang; Feng, Zhouquan] Hunan Univ, Coll Civil Engn, Key Lab Wind & Bridge Engn Hunan Prov, Changsha 410006, Peoples R China.;[Hu, Jianhua; Huang, Guoping] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;[Hu, Jianhua] Hunan Prov Commun Planning Survey & Design Inst, Changsha 410011, Peoples R China.;[Wan, Tianbao] China Railway Major Bridge Reconnaissance & Design, Wuhan 430050, Peoples R China.
通讯机构：
[Zhouquan Feng] A;Associate Professor, Key Laboratory for Wind and Bridge Engineering of Hunan Province, College of Civil Engineering, Hunan Univ., Changsha 410006, China
摘要：
Live load of moving vehicles has a very important effect on the fatigue life of suspension bridges, which causes not only vertical deformation but also longitudinal deformation. In this study, a general analytical formulation for analyzing the quasistatic longitudinal displacement of suspension bridges under vertical live loads is developed, and the underlying deformation mechanism is revealed. First, the analytical vertical and longitudinal deformation equations for the single main cable subjected to live loads are formulated considering the geometric nonlinearity. Then, the relation of longitudinal displacements between the stiffening girder and the main cable for a single-span suspension bridge is established through analyzing the geometric configuration of deformed deck-suspender segment and imposing the null longitudinal force condition. The relation is further modified to incorporate the effect of central buckles (CBs). Compared with the finite-element (FE) prediction, the proposed analytical solution is quite accurate for both concentrated and distributed loads. It is found that the coupling of vertical and longitudinal displacement of main cables and the longitudinal constraint between the cables and girder, are responsible for the longitudinal displacement of the girder. The effects of sag-to-span ratio, CB, and inclined suspenders are studied. The longitudinal displacement of the girder can be reduced by about 20% when the sag-to-span ratio is varied from 1/9 to 1/11, and the CB with proper stiffness is more effective in reducing the longitudinal displacements. The proposed formulation can be conveniently applied for parameter optimization in the preliminary design stage so as to avoid tedious repetitive FE analysis.
通讯机构：
[Zhefeng Liu] S;School of Civil Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
In order to understand the seismic damage assessment of reinforced concrete column members, the coupling relationship between the capacity degradation and the accumulated hysteretic energy and the displacement history was considered. The energy-based damage index under the random variable amplitude loading history was proposed. On the basis of preliminary research, the corresponding relationship between the damage index and the construction member parameters and seismic parameters was established, the damage mechanism was analyzed according to the damage index, and then the performance-based design process was proposed. It was found that increase in the stirrup ratio can slow down the damage, and the slowing effect was initially fast and then slows. When the reinforcement ratio is doubled, the damage index decreased by 0.063. The longer the earthquake duration was, the more serious the damage was, and this phenomenon was more obvious when the ductility coefficient was larger. With the increase in the ductility coefficient, the damage continuously increased. Therefore, it is an effective way to decrease the damage by controlling the ductility coefficient. Among all the influencing factors, the fundamental period and seismic intensity contributed more significantly to the damage indicators. When the damage index (performance objective) was determined, the target stirrup ratio can be obtained according to the proposed performance design process, that is, this design process can be used in the performance-based design. The design method based on damage index can make up for the deficiency that the design method based on the ductility coefficient does not consider the earthquake duration.
摘要：
In the computer-aided diagnosis system, the use of medical database data mining and knowledge discovery technology is of great significance and necessity of development. To understand the health status of left-behind children in ethnic minority areas, a questionnaire survey and computer-aided technology were used to diagnose and investigate the health status of left-behind children aged 6-12 years in Xiangxi, Hunan Province, such as body shape, physical function and personal cognition. The comparison results show that the body shape, function and perception of left-behind children are not optimistic. The countermeasures are to strengthen policy support, school physical education and the supervision consciousness of the guardian, make the government, schools and families form a joint force, establish a scientific work and leisure system, improve the quality of life, and effectively build the health level of left-behind children.
期刊：
Mechanics Based Design of Structures and Machines,2023年51(6):3004-3025 ISSN：1539-7734
通讯作者：
Xian-Fang Li
作者机构：
[Zhang, Xue-Yang; Peng, Yi; Li, Xian-Fang] Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China.;[Peng, Yi] Hunan City Univ, Sch Civil Engn, Yiyang, Peoples R China.
通讯机构：
[Xian-Fang Li] S;School of Civil Engineering, Central South University, Changsha, PR China
关键词：
Heat-moisture coupling;convective boundary;non-Fourier effect;hygrothermal stresses;phase lag
摘要：
In this article, by considering the Dufour effect and Soret effect, a hygrothermal coupling model based on phase delay of heat and moisture fluxes is established for convective surfaces. The convective surfaces are described by Robin boundary conditions. The Dirichlet boundary conditions (prescribed temperature and moisture on the surfaces) and Neumann boundary conditions (prescribed heat and moisture fluxes) are two extreme cases of the Robin conditions. Using Laplace transform, the effects of different relaxation times and moist-heat coupling on the temperature, moisture, and stress of the hollow cylinder are analyzed from two aspects of time and space. For convective boundary, the dependence of temperature, moisture, and stress on the phase lag of heat and moisture fluxes is examined. The results show that the temperature and moisture distributions along with the hygrothermal stress fields exhibit different behaviors, depending on the coefficient of Robin condition.
