您的检索：
学者姓名：张楠
精炼检索结果：
年份
成果类型
收录类型
来源
综合
合作者
语言
清除所有精炼条件
摘要 ：
The COVID-19 pandemic has significantly impacted people's daily lives for over three years. Airports, with their dense population and frequent close contact, pose a higher risk of respiratory infectious diseases compared to many other indoor environments. However, limited availability of data on close contact behavior has resulted in a gap in indoor exposure analysis. This study conducted depth sensor measurements and video data collection across nine areas of a northern (airport A) and a southern (airport B) airports in China by 11 participants. The data, comprising more than 44 h of close contact behaviors, including interpersonal distance, relative facial orientation, and the relative position of individuals, were analyzed using a semi-supervised ma-chine learning method. Based on this analysis, a close contact transmission model for COVID-19 was developed, which considers the aforementioned close contact behaviors to assess the risk of exposure and the efficacy of interventions. The average close contact ratio in 9 airport's areas is 25.4 % (ranging from 6.1 % to 55.0 %), with passengers having the highest frequency of close contact in manual check-in areas. During close contacts, the average interpersonal distance in airports is 1.2 m (ranging from 1.1 to 1.4 m), being shortest in boarding areas. Face-to-face close contact is highest in charging areas, with a percentage of 46.9 %. If people maintain a distance of over 1.0 m in all areas, the total virus exposure could be reduced by 6.9 %-22.0 % compared to the actual situation. Dining areas have the highest virus exposure risk for both short-range inhalation and mucosal deposition, followed by manual check-in areas. This study provides a data support for the scientific epidemic prevention and control in airports from the viewpoint of close contact behaviors.
关键词 ：
Virus exposure Virus exposure Close contact behavior Close contact behavior Airport Airport Inhalation and mucosal deposition Inhalation and mucosal deposition COVID-19 COVID-19
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Yang, Xueze , Dou, Zhiyang , Ding, Yuqing et al. Analysis of SARS-CoV-2 transmission in airports based on real human close contact behaviors [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 82 . |
| MLA | Yang, Xueze et al. "Analysis of SARS-CoV-2 transmission in airports based on real human close contact behaviors" . | JOURNAL OF BUILDING ENGINEERING 82 (2024) . |
| APA | Yang, Xueze , Dou, Zhiyang , Ding, Yuqing , Su, Boni , Qian, Hua , Zhang, Nan . Analysis of SARS-CoV-2 transmission in airports based on real human close contact behaviors . | JOURNAL OF BUILDING ENGINEERING , 2024 , 82 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Outbreaks of respiratory infectious diseases have often been reported in fitness centers, likely attributed to high population density, extensive shared surfaces, and elevated metabolic equivalent (MET) levels. This study analyzed the behaviors of 30 gym attendees to establish a connection between exercise intensity and virus exposure. Close interactions among participants were tracked using self-developed wearable devices that utilized computer vision technologies, while surface-contact behaviors were recorded using video cameras. A multi-route transmission model for respiratory infectious diseases was subsequently created, integrating the observed behaviors. The Omicron variant of COVID-19 served as a case study to evaluate infection risk via various transmission routes and to assess the efficacy of interventions. The METs during physical activity were about 3.5 times higher than those recorded at rest. The average interpersonal distance during close interactions in the gym was measured at 0.82 m, with 36.7 % of interactions occurring face-to-face. On average, the participants made contact with surfaces 770.3 times per hour, with 517.5 of these contacts involving public surfaces. The hourly infection rate was calculated at 18.5 %, with long-range airborne transmission and close contact accounting for 70.1 % and 28.5 % of the cases, respectively. To mitigate transmission risk, several intervention scenarios were modeled. These included (1) 100 % mask-wearing with N95 masks and occupancy reduced to 62 % (25 m2/person); 2 /person); (2) 100 % mask-wearing with surgical masks and occupancy reduced to 26% (59.6 m2/person); 2 /person); (3) no mask-wearing, with occupancy reduced to 18 % (86.1 m2/person). 2 /person). All scenarios fulfilled the criteria for achieving an R t below 1, indicating that under these conditions, gyms could be reopened safely.
关键词 ：
Metabolic equivalent (MET) Metabolic equivalent (MET) Gym Gym COVID-19 COVID-19 Human behavior Human behavior Epidemic prevention and control Epidemic prevention and control
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhang, Haochen , Zhao, Pengcheng , Dou, Zhiyang et al. Transmission of respiratory diseases in high-metabolic environments: A case study of gym [J]. | BUILDING AND ENVIRONMENT , 2024 , 267 . |
| MLA | Zhang, Haochen et al. "Transmission of respiratory diseases in high-metabolic environments: A case study of gym" . | BUILDING AND ENVIRONMENT 267 (2024) . |
| APA | Zhang, Haochen , Zhao, Pengcheng , Dou, Zhiyang , Su, Boni , Li, Yuguo , Zhang, Nan . Transmission of respiratory diseases in high-metabolic environments: A case study of gym . | BUILDING AND ENVIRONMENT , 2024 , 267 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
To quantify the risk of the transmission of respiratory infections in indoor environments, we systematically assessed exposure to talking-and breathing-generated respiratory droplets in a generic indoor environment using computational fluid dynamic (CFD) simulations. The flow field in the indoor environment was obtained with SST k-omega model and Lagrangian method was used to predict droplet trajectories, where droplet evaporation was considered. Droplets can be categorized into small droplets (initial size <= 30 mu m or <= 10 mu m as droplet nuclei), medium droplets (30-80 mu m) and large droplets (>100 mu m) according to the exposure characteristics. Droplets up to 100 mu m, particular the small ones, can contribute to both short-range and long-range airborne routes. For the face-to-face talking scenario, the intake fraction and deposition fractions of droplets on the face and facial mucosa of the susceptible were up to 4.96%, 2.14%, and 0.12%, respectively, indicating inhalation is the dominant route. The exposure risk from a talking infector decreases monotonically with the interpersonal dis-tance, while that of nasal-breathing generated droplets maintains a relatively stable level within 1.0 m. Keeping an angle of 15 degrees or above with the expiratory flow is efficient to reduce intake fractions to <0.37% for small droplets. Adjusting the orientation from face-to-face to face-to-back can reduce exposure to small droplets by approximately 88.0% during talking and 66.2% during breathing. A higher ventilation rate can reduce the risk of exposure to small droplets but may increase the risk of transmission via medium droplets by enhancing their evaporation rate. This study would serve as a fundamental research for epidemiologist, healthcare workers and the public in the purpose of infection control.
关键词 ：
Relative position Relative position Interpersonal distance Interpersonal distance Close contact Close contact Respiratory droplets Respiratory droplets COVID-19 COVID-19 Airborne route Airborne route
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Wei, Jianjian , Wang, Lei , Jin, Tao et al. Effects of occupant behavior and ventilation on exposure to respiratory droplets in the indoor environment [J]. | BUILDING AND ENVIRONMENT , 2023 , 229 . |
| MLA | Wei, Jianjian et al. "Effects of occupant behavior and ventilation on exposure to respiratory droplets in the indoor environment" . | BUILDING AND ENVIRONMENT 229 (2023) . |
| APA | Wei, Jianjian , Wang, Lei , Jin, Tao , Li, Yuguo , Zhang, Nan . Effects of occupant behavior and ventilation on exposure to respiratory droplets in the indoor environment . | BUILDING AND ENVIRONMENT , 2023 , 229 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明提供了一种污水处理体系以及一种污水处理的方法，属于污水处理技术领域。本发明结合使用小球藻与自养脱氮活性污泥，克服了现有的菌藻共生污水处理系统效果有待改进的问题。本发明能够强化对污水的脱氮处理，而且该系统含有大量反硝化菌，可在夜间进行反硝化过程，实现对总氮浓度的控制。本发明采用的小球藻‑自养脱氮活性污泥的菌藻共生污水处理系统对SCOD的去除率可高达95.87％，对磷酸盐的去除率可达到91.11％，对氨氮的去除率可高达100％，同时出水总氮浓度可控制在12mg/L以下，处理后的污水可稳定达到国家一级A排放标准。
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 刘秀红 , 亓林雪 , 王梓恒 et al. 一种污水处理体系以及一种污水处理的方法 : CN202310194507.4[P]. | 2023-03-03 . |
| MLA | 刘秀红 et al. "一种污水处理体系以及一种污水处理的方法" : CN202310194507.4. | 2023-03-03 . |
| APA | 刘秀红 , 亓林雪 , 王梓恒 , 张楠 . 一种污水处理体系以及一种污水处理的方法 : CN202310194507.4. | 2023-03-03 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本公开的病毒表面传播风险监测系统包括目标物、压力传感装置和控制器，目标物与压力传感装置至少部分地层叠设置，压力传感装置与控制器通信连接；压力传感装置用于响应于人员对目标物的触摸动作生成相应的电信号，并将电信号发送至控制器；控制器用于基于电信号计算人员针对目标物的至少一项触摸行为数据，并基于触摸行为数据确定目标物的病毒传播风险。上述系统能够通过压力传感装置对人员向目标物实时的触摸行为进行实时监测，测量数据精度高且可以省去人工观测和记录数据的繁琐操作，压力传感装置所输出的电信号能够准确反映人员对目标物的触摸力度、触摸频率和触摸时长，控制器基于这些数据确定出目标物的较为客观的病毒传播风险。
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 张楠 , 常宝天 . 病毒表面传播风险监测系统 : CN202310463050.2[P]. | 2023-04-26 . |
| MLA | 张楠 et al. "病毒表面传播风险监测系统" : CN202310463050.2. | 2023-04-26 . |
| APA | 张楠 , 常宝天 . 病毒表面传播风险监测系统 : CN202310463050.2. | 2023-04-26 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The public areas of airports are often bustling, raising the risk of infectious diseases spreading through fomites. We recorded 21.3 h of video at three airports, focusing on nine common areas (e.g., boarding and check-in areas) where people touch surfaces. We analyzed 25,925 touches to create a model for how microbes spread from surfaces to humans through touch. The airport mask-wearing rate is high (96.1% in non-restaurant areas), but it is lower (22%) in restaurants. Passengers touch their mucous membranes more often (10.3 times/hour) in restaurants compared to other areas (1.6 times/hour on average). Wearing a mask can significantly reduce the risk of obtaining a virus through direct contact with hands and mucous membranes. If everyone in non-restaurant areas wore masks, the viral intake fraction could be reduced by up to 97.4% compared to not wearing masks. People touch public surfaces the most in self-service check-in areas, at a rate of 473.5 times per hour. Disinfecting public surfaces or hands twice per hour could reduce the viral intake fraction in each area by 27.7% or 15.4%, respectively. The findings of this study provide valuable data support and a scientific foundation for implementing interventions aimed at mitigating fomite transmission within airport settings.
关键词 ：
hand washing hand washing airport airport surface disinfection surface disinfection human behavior human behavior fomite transmission fomite transmission surface touch surface touch
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhuang, Linan , Ding, Yuqing , Zhou, Linlin et al. Fomite Transmission in Airports Based on Real Human Touch Behaviors [J]. | BUILDINGS , 2023 , 13 (10) . |
| MLA | Zhuang, Linan et al. "Fomite Transmission in Airports Based on Real Human Touch Behaviors" . | BUILDINGS 13 . 10 (2023) . |
| APA | Zhuang, Linan , Ding, Yuqing , Zhou, Linlin , Liu, Ronghan , Ding, Jiajie , Wang, Rui et al. Fomite Transmission in Airports Based on Real Human Touch Behaviors . | BUILDINGS , 2023 , 13 (10) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The established reference spectrum (ASTM AM1.5) based on mid-latitudes is still the most frequently used standard in design and simulation in various fields worldwide, however, the solar spectrum varies with climate and time, which significantly affects the evaluations of solar energy utilization. This study proposes a novel reference spectrum analysis method to establish several local reference spectra, in this case, based on 147,374 spectra in Beijing, which can characterize solar resources throughout the year. The dataset consists of spectra of direct normal irradiance, and a deep learning autoencoder is adopted to extract the intrinsic features of each spectrum for clustering. 10 clusters are finally divided by agglomerative hierarchical clustering, and 10 local reference spectra were identified from each cluster by correlation analysis. The results show that the shape of new reference spectra shifts to the short wave as the irradiance increases, and the average photon energy increases from 1.069 eV to 1.456 eV. The new local reference spectra are compared with the standard spectrum AM1.5D to show the influence of shape variations, and it reveals 61% maximum differences among photovoltaic applications. The superiority verified new reference spectra could be further used to optimize local solar technologies design and guide photovoltaic material development.
关键词 ：
Average photon energy Average photon energy Reference spectra Reference spectra Solar spectral irradiance Solar spectral irradiance Agglomerative hierarchical clustering Agglomerative hierarchical clustering Direct normal irradiance Direct normal irradiance
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhao, Yifan , Xue, Peng , Fan, Cheng et al. Data mining techniques for novel local reference solar irradiance spectra calculations: A case study in Beijing [J]. | SOLAR ENERGY , 2023 , 258 : 106-117 . |
| MLA | Zhao, Yifan et al. "Data mining techniques for novel local reference solar irradiance spectra calculations: A case study in Beijing" . | SOLAR ENERGY 258 (2023) : 106-117 . |
| APA | Zhao, Yifan , Xue, Peng , Fan, Cheng , Li, Bojia , Zhang, Nan , Ma, Tao et al. Data mining techniques for novel local reference solar irradiance spectra calculations: A case study in Beijing . | SOLAR ENERGY , 2023 , 258 , 106-117 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Debate and scientific inquiries regarding airborne transmission of respiratory infections such as COVID-19 and influenza continue. Health authorities including the WHO and the US CDC have recognized the airborne transmission of COVID-19 in specific settings, although the ventilation requirements remain to be determined. In this work we consider the long-range airborne transmission as an extended short-range airborne route, which reconciles the link between short- and long-range airborne routes. The effective short-range distance is defined as the distance in short range at which long-range route has the same volumetric exposure value as that due to short-range route. Our data show that a decrease in ventilation rate or room volume per person, or an increase in the ratio of the number of infected to susceptible people reduces the effective short-range distance. In a normal breathing scenario with one out of five people infected and a room volume of 12 m3 per person to ensure an effective short-range distance of 1.5 m, a ventilation rate of 10 L/s per person is needed for a duration of 2 h. Our results suggest that effective environmental prevention strategies for respiratory infections require appropriate increases in the ventilation rate while maintaining a sufficiently low occupancy. Practical implications: Demonstration of the long-range airborne route as an extended short-range airborne route suggests the significant role played by building ventilation in respiratory infection exposure. The reconciliation of short- and long-range airborne transmission suggests that the commonly observed dominance of close-contact transmission is a probable evidence of short-range airborne transmission, following a separate earlier study that revealed the relative insignificance of large droplet transmission in comparison with the short-range airborneroute. Existing ventilation standards do not account for respiratory infection control, and this study presents a possible approach to account for infection under new ventilation standards.
关键词 ：
Airborne transmission Airborne transmission COVID-19 COVID-19 Crowding Crowding Indoor environment Indoor environment Ventilation rate Ventilation rate
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Chen, Wenzhao , Qian, Hua , Zhang, Nan et al. Extended short-range airborne transmission of respiratory infections [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
| MLA | Chen, Wenzhao et al. "Extended short-range airborne transmission of respiratory infections" . | JOURNAL OF HAZARDOUS MATERIALS 422 (2022) . |
| APA | Chen, Wenzhao , Qian, Hua , Zhang, Nan , Liu, Fan , Liu, Li , Li, Yuguo . Extended short-range airborne transmission of respiratory infections . | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种碱金属、碱土金属活化的负载型Pd簇催化剂制备方法，属于化学催化剂应用技术领域。该方法的步骤如下：将TiO2、碱金属或碱土金属氢氧化物与过氧化氢溶液一起进行水热反应，水热反应的温度为100‑160℃，水热反应时间为6‑12h；随后，向水热产物中加入Pd前驱体，进行水浴处理，设定水浴温度为60‑90℃，水浴处理1‑4h，随后经离心、洗涤，干燥、研磨，在空气中200‑300℃煅烧1‑2h，得到碱金属、碱土金属活化的负载型Pd簇催化剂。本发明提供的碱金属、碱土金属活化的负载型Pd簇催化剂具有高效率室温催化降解氮氧化物活性, 与单纯负载Pd簇和Pd纳米颗粒负载相比，具有更高的催化活性以及更低的Pd负载量。
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 李永利 , 张楠 , 王金淑 et al. 一种碱金属、碱土金属活化的负载型Pd簇催化剂制备方法 : CN202210016043.3[P]. | 2022-01-07 . |
| MLA | 李永利 et al. "一种碱金属、碱土金属活化的负载型Pd簇催化剂制备方法" : CN202210016043.3. | 2022-01-07 . |
| APA | 李永利 , 张楠 , 王金淑 , 赵梦迪 , 吴俊书 , 牛雷 et al. 一种碱金属、碱土金属活化的负载型Pd簇催化剂制备方法 : CN202210016043.3. | 2022-01-07 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The COVID-19 pandemic has led to considerable morbidity and mortality, and consumed enormous resources (e.g. energy) to control and prevent the disease. It is crucial to balance infection risk and energy consumption when reducing the spread of infection. In this study, a quantitative human, behavior-based, infection risk-energy consumption model for different indoor environments was developed. An optimal balance point for each indoor environment can be obtained using the anti-problem method. For this study we selected Wangjing Block, one of the most densely populated places in Beijing, as an example. Under the current ventilation standard (30 m(3)/h/person), prevention and control of the COVID-19 pandemic would be insufficient because the basic reproduction number (R0) for students, workers and elders are greater than 1. The optimal required fresh air ventilation rates in most indoor environments are near or below 60 m3/h/person, after considering the combined effects of multiple mitigation measures. In residences, sports buildings and restaurants, the demand for fresh air ventilation rate is relatively high. After our global optimization of infection risk control (R-0 <= 1), energy consumption can be reduced by 13.7% and 45.1% on weekdays and weekends, respectively, in contrast to a strategy of strict control (R-0 = 1 for each indoor environment). (C) 2022 Elsevier B.V. All rights reserved.
关键词 ：
Infection risk Infection risk Human behavior Human behavior COVID-19 COVID-19 Pandemic prevention and control Pandemic prevention and control Energy consumption Energy consumption
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Guo, Yong , Zhang, Nan , Hu, Tingrui et al. Optimization of energy efficiency and COVID-19 pandemic control in different indoor environments [J]. | ENERGY AND BUILDINGS , 2022 , 261 . |
| MLA | Guo, Yong et al. "Optimization of energy efficiency and COVID-19 pandemic control in different indoor environments" . | ENERGY AND BUILDINGS 261 (2022) . |
| APA | Guo, Yong , Zhang, Nan , Hu, Tingrui , Wang, Zhenyu , Zhang, Yinping . Optimization of energy efficiency and COVID-19 pandemic control in different indoor environments . | ENERGY AND BUILDINGS , 2022 , 261 . |
| 导入链接 | NoteExpress RIS BibTex |
导出
| 数据： |
选中 到 |
| 格式： |
