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Removal of hydrophobic volatile organic compounds with sodium hypochlorite and surfactant in a co-current rotating packed bed

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Journal of Environmental Sciences 2018年第2期30卷 190-196页

作者： Wenhui Li Haidi Liu Shuangde Li Weiman Li Yunfa Chen Jiajia Gao Yaqun Cao State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Healthy &Intelligent Kitchen System Integration Zhejiang Ningbo 315336 China University of Chinese Academy of Sciences Beijing 100049 China

A co-current flow rotating packed bed was applied to remove volatile organic compounds（VOCs） by sodium hypochlorite（Na Cl O） and surfactant（sodium dodecyl benzene sulfonate,SDBS） from air stream. Xylene was used as a model VOC herein. The effect of p H,concentration of Na Cl O and SDBS solution, liquid flow rate, gas flow rate and rotational speed on xylene removal efficiency and overall mass transfer coefficient（KGa） were discussed. Then, a correlation for KGa of the co-current rotating packed bed was proposed by fitting the experimental data of KGa and independent variables of liquid/gas ratio,rotational speed, p H, Na Cl O concentration and treatment time, which was in good agreement with the experimental data（the deviation ≤ ± 30%）.

关键词： Co-current flow rotating packed bed VOCs Removal efficiency Overall mass transfer coefficient

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Active Compliance Control of a Position‑Controlled Industrial Robot for Simulating Space Operations

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Chinese Journal of Mechanical engineering 2022年第6期35卷 63-75页

作者： Jun He Mingjin Shen Feng Gao Haibo Zhang State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Beijing Institute of Control Engineering Beijing 100190China

An industrial robot with a six-axis force/torque sensor is usually used to produce a zero-gravity environment for testing space robotic ***,using traditional force control methods,such as admittance control,causes position-controlled industrial robots to undergo from force divergence owing to intrinsic time *** this paper,a new force control method is proposed to eliminate the force divergence.A hardware-in-the-loop(HIL)simulator with an industrial robot is first *** free-floating satellite dynamics and the motion mapping from the satellites to simulator are both ***,the effects of measurement delay and dynamic response delay on contact velocity and force are *** that,a real-time estimation method for contact stiffness and damping is proposed based on the adaptive Kalman *** measurement delay is compensated by a phase lead ***,the identified contact parameters are adopted to modify contact forces,and thus the dynamics response delay can be compensated ***,a co-simulation and experiments were conducted to verify the force control *** results show that contact stiffness and damping could be identified exactly and that the simulation divergence could be *** paper proposes an active compliance control method that can deal with force constrained tasks of a position-controlled robot in unknown environments.

关键词： Contact stiffness Parameter estimation Force control Space operation

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Sequential processing of multiple explosive sources for bottom characterization in shallow waters 13

Sequential processing of multiple explosive sources for bott...

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13th International Conference on Theoretical and Computational Acoustics, ICTCA 2017

作者： Ren, Q. Lu, L. Ma, L. Liao, T. Institute of Acoustics Chinese Academy of Sciences Beijing100190 China Key Laboratory of Underwater Acoustics Environment Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Complex System Simulation Beijing Institute of System Engineering Beijing100101 China

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Characteristic acoustic impedance for more reliable environmental characterization 13

Characteristic acoustic impedance for more reliable environm...

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13th International Conference on Theoretical and Computational Acoustics, ICTCA 2017

作者： Ren, Qunyan Lu, Licheng Ma, Li Guo, Shengming Liao, Tianjun Institute of Acoustics Chinese Academy of Sciences Beijing100190 China Key Laboratory of Underwater Acoustics Environment Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Complex System Simulation Beijing Institute of System Engineering Beijing100101 China

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Research on key Technologies of Cross-domain Guidance 8

Research on Key Technologies of Cross-domain Guidance

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8th Symposium on Novel Photoelectronic Detection Technology and Applications

作者： Guo, Xiaoyun Wu, Chengfeng Fang, Xueli Xu, Cheng Li, Hui Beijing Institute of Mechanical and Electrical Engineering Beijing China Beijing Institute of Mechanical and Electrical Engineering Science and Technology on Complex System Control and Intelligent Agent Cooperative Laboratory Beijing China Beijing Institute of Mechanical and Electrical Engineering Key Laboratory of Complex Aviation Simulation System Beijing China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Cross-domain synergy and intelligence will become important features of future warfare. Cross-domain guidance is one of the typical forms of cross-domain synergy. It can significantly improve the ability to respond quickly to random targets and time-sensitive targets and enhance the anti-jamming ability in the case of confrontation. This article introduces the concept and winning mechanism of cross-domain guidance, analyzes the research progress of cross-domain guidance at home and abroad, combs the key technologies of cross-domain guidance, summarizes the current challenges and problems in cross-domain guidance research, and proposes development suggestions. © 2022 SPIE

关键词： Optical engineering

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Potential Challenges and Food Security Responses to Climate Change in China and Mongolia in the Post-COP28 Era

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Journal of Resources and Ecology 2025年第1期16卷 22-35页

作者： CHEN Jiannan Faith Ka Shun CHAN WANG Jiayu FENG Meili WANG Zilin Ochir ALTANSUKH SHAO Yating LI Pengfei WANG School of Human Settlements and Civil Engineering Xi’an Eurasia UniversityXi’an 710054China College of Geomatics Xi’an University of Science and TechnologyXi’an 710054China School of Geographical Sciences University of Nottingham Ningbo ChinaNingboZhejiang 315100China Water@Leeds Research Institute and School of Geography University of LeedsLeeds LS29JTUK Research Centre for Intelligent Management&Innovation Development/Research Base for Shenzhen Municipal Policy&Development Southern University of Science and TechnologyShenzhenGuangdong 518000China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamenFujian 361021China Department of Environment and Forest Engineering School of Engineering and Technology and Environmental Engineering LaboratoryNational University of MongoliaUlaanbaatar 14201Mongolia State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

After the COP28 Conference,many countries are increasingly concerned about their future practices regarding food *** North Asia,the Northeast China is the major food production base for the *** the border,the economy of Mongolia is heavily reliant on agricultural production and animal *** recent years,climatic extremes such as droughts and floods,combined with human-induced overgrazing,have posed alarming threats to food *** review illustrates the challenges and constraints these two countries are facing due to climate changes and summarizes the existing measures and established programs in both ***,we develop the“climate resilient agriculture”(CRA)framework for improving agricultural *** framework emphasizes the importance of international institutions,such as the World Bank,and developed countries to provide more financial and technological support to bolster climate resilience in Northern ***,we conclude by encouraging cross-border co-production and collaborations among governments to implement the CRA framework to tackle future climatic challenges.

关键词： agricultural sensitivity climatic extremes climate resilient agriculture(CRA) food security China and Mongolia

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NO_x reduction in the sintering process

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 143-148页

作者： Yan-guang Chen Zhan-cheng Guo Zhi Wang Gen-sheng Feng State Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of the Ministry of Education of China for Recycling ＆ Ecologic Metallurgy University of Science and Technology Beijing Beijing 100083China

A new process, NOx reduction with recycling flue gas and modifying coke breeze, was proposed. The effects of modified coke breeze and recycled flue gas on NOx reduction were investigated by sinter pot tests. The results show that the NOx reduction rate is over 10wt% in the sintering of modified coke breeze, the effects of the additives on NOx reduction are： CeO2〉CaO〉K2CO3. The NOx reduction rate increases with the amount of recycled flue gas, and is 22.35wt% in the sintering with recycling 30vol% of the flue gas. When 30vol% of the flue gas is recycled into the sintering of CeO2, CaO, and K2CO3 modified coke breeze, the NOx reduction rates are 36.10wt%, 32.56wt%, and 32.17wt%, respectively.

关键词： nitrogen oxide flue gas coke breeze cerium oxide sintering

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Discrete and continuum modeling of granular flow in silo discharge

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Particuology 2018年第1期16卷 127-138页

作者： Tian Tian Jinglin Su Jinhui Zhan Shujun Geng Guangwen Xu Xiaoxing Liu State Key Laboratory of Multi-Phase Complex System Institute of Process Engineering Chinese Academy of Science Beijing 100190 China University of Chinese Academy ofSdences Beijing 100049 China Sino-Danish Center for Education and Research Beijing 100190 China

Granular material discharge from a flat-bottomed silo has been simulated by using continuum modeling and a three-dimensional discrete-element method （DEM）. The predictive abilities of three commonly used frictional viscosity models （Schaeffer, S-S, and μ（I）） were evaluated by comparing them with the DEM data. The funnel-flow pattern （type C） and the semi-mass-flow pattern （type B） that was predicted by DEM simulations can be represented when the Schaeffer orμ（I） model is used, whereas the S-S model gives a consistent type-B flow pattern. All three models over-estimate the discharge rate compared with the DEM. The profiles of the solids volume fraction and the vertical velocity above the outlet show that the larger discharge rates given by the Schaeffer and μ（I） model result from an over-estimation of volume fraction, whereas the deviation in the S-S model stems from the failure to predict a solid vertical velocity and a volume fraction.

关键词： Silo Flow pattern Discharge rate Discrete-element model Frictional viscosity model

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Non-uniform climatic responses of land surface phenology derived from optical-, fluorescence-, and microwave-based satellite observations

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Remote Sensing of Environment 2025年 325卷

作者： Qu, Wendi Hu, Lu Peñuelas, Josep Liang, Xiaoyu Li, Yang He, Wenjun Wu, Chaoyang College of Geography and Environmental Science Henan University Kaifeng475004 China The Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China University of the Chinese Academy of Sciences Beijing100049 China International Institute for Earth System Science Nanjing University Nanjing China CSIC Global Ecology Unit CREAF-CSIC-UAB Bellaterra Catalonia Barcelona08193 Spain CREAF Cerdanyola del Valles Catalonia Barcelona08193 Spain Department of Geography The Ohio State University ColumbusOH United States Department of Geography National University of Singapore Singapore Singapore Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Shandong University of Aeronautics Shandong Province Binzhou256600 China

Satellite remote sensing has greatly advanced the study of land surface phenology, providing crucial insights into large-scale vegetation dynamics in the context of climate change. Multi-sensor satellite-derived vegetation proxies, such as the normalized difference vegetation index (NDVI) in optical mode, solar-induced chlorophyll fluorescence (SIF) in fluorescence mode, and vegetation optical depth (VOD) in microwave mode, are effective indicators of vegetation dynamics in greenness, biomass, and productivity. However, a comprehensive understanding of phenological patterns derived from these proxies and their climatic responses remains limited. In this study, spanning 1988–2021, we analyzed spatio-temporal patterns and climatic responses of spring green-up dates (GUDs) and autumn dates of foliar senescence (DFSs) across the three vegetation proxies. We found broadly consistent trends of advancing GUDs (−2.4 to −1.1 days decade−1) across proxies, while DFSs exhibited divergent temporal patterns: VOD-derived DFSs showed significant delays (+1.1 days decade−1), whereas NDVI- and SIF-derived DFSs displayed no clear trends. Rising temperatures were the primary driver of earlier GUDs, while precipitation and insolation had limited influence. In autumn, warming delayed VOD-based DFSs but had minimal effects on NDVI- and SIF-based estimates. Spatial attribution analyses indicated that both biotic and abiotic factors contributed to the spatial variability in climatic responses, with species richness and tree density modulating temperature effects. These findings highlight the importance of proxy selection in phenological studies and underscore the need for integrated investigations into the biophysical mechanisms driving non-uniform climatic responses across vegetation proxies. © 2025

关键词： Vegetation

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Determination of time-and size-dependent fine particle emission with varied oil heating in an experimental kitchen

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Journal of Environmental Sciences 2017年第1期29卷 157-164页

作者： Shuangde Li Jiajia Gao Yiqing He Liuxu Cao Ang Li Shengpeng Mo Yunfa Chen Yaqun Cao State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Key Laboratory of Healthy&Intelligent Kitchen System Integration ZhejiangNingbo315336China University of Chinese Academy of Sciences Beijing 100049China

Particulate matter（PM） from cooking has caused seriously indoor air pollutant and aroused risk to human *** is urged to get deep knowledge of their spatial-temporal distribution of source emission characteristics,especially ultrafine particles（UFP ＆lt; 100 nm） and accumulation mode particles（AMP 100-555 nm）.Four commercial cooking oils are auto dipped water to simulate cooking fume under heating to 255℃ to investigate PM emission and decay features between 0.03 and 10 μm size dimension by electrical low pressure impactor（ELPI） without *** and sunflower produced high PM_（2.5） around5.1 mg/m^3,in comparison with those of soybean and corn（5.87 and 4.55 mg/m^3,respectively）at peak emission time between 340 and 450 sec since heating oil,but with the same level of particle numbers 6-9 × 10~5/cm^*** values of PM_（1.0）/PM_（2.5） and PM_（2.5）/PM_（10） at peak emission time are around 0.51-0.55 and *** 15 min naturally deposition,decay rates of PM_（1.0）,PM_（2.5） and PM_（10） are 13.3%-29.8%,20.1%-33.9%and 41.2%-54.7%,which manifest that PM_（1.0） is quite hard to decay than larger particles,PM_（2.5） and PM_（1.0）.The majority of the particle emission locates at 43 nm with the largest decay rate at 75%,and shifts to a larger size between137 and 555 nm after 15 min *** decay rates of the particles are sensitive to the oil type.

关键词： Cooking fume Ultrafine particle Number concentration Size distribution Emission character

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