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SSRN 2022年

作者： Wang, Pengfei Liu, Kaili Ren, Zhijun Lv, Longyi Liu, Xiaoyang Sun, Li Yan, Wenyi Zhang, Guangming Li, Weiguang Gao, Wenfang Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental Engineering Hebei University of Technology Tianjin300401 China School of Environment Harbin Institute of Technology Harbin150090 China National Key Laboratory of Biochemical Engineering Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China

The landfill is still the primary waste treatment method in developing countries. Due to the long stability time and long-term occupation of a large amount of land, the landfill poses a significant threat to the ecological environment and affects the process of urbanization. This study conducted a landfill simulation reactor (LSR) experiment to achieve rapid landfill stabilization through micro-aeration and leachate recirculation. More than 60% of the degradable organic carbon in the enhanced process (LSR-IV contains 24% of the retained carbon) can be relatively quickly converted to gaseous state, which is nearly half higher than the degradation efficiency of the traditional process (LSR-I contains 59.3% of the retained carbon). A comprehensive environmental assessment is developed for the enhanced process, and better environmental benefits are obtained from the whole landfill process. Compared with conventional treatment process, the enhanced process is applied to the actual landfill to analyze the economic cost. In terms of the total cost, the enhanced process cost (2010 CNY) is about 44% lower than the conventional landfill process cost (3604 CNY). The enhanced process saves nearly half of the time cost and reduces the cost of land acquisition. Focusing on technology, economy and environment of waste treatment, this study can provide a reference for governmental, and municipal administrations to carry out the technological transformation of traditional landfills. © 2022, The Authors. All rights reserved.

关键词： Degradation

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Polarization-Insensitive Terahertz Biosensing Method Based on Toroidal Dipole Metasurface

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IEEE Sensors Journal 2025年

作者： Liu, Heng Ke, Xue Shen, Liran Cao, Yuqi Zhang, Yi Tian, Liangfei Chen, Jiani Meng, Xue Huang, Pingjie Zhang, Guangxin Zhejiang University State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Hangzhou310000 China Zhejiang University College of Biomedical Engineering and Instrument Science Hangzhou310000 China Hangzhou Ltd TROE Photonics Hangzhou310000 China Zhejiang University School of Medicine Key Laboratory of Molecular Biology in Medical Sciences The Second Affiliated Hospital Department of Breast Surgery Cancer Institute Key Laboratory of Cancer Prevention and Intervention China National Ministry of Education Zhejiang Province Hangzhou310009 China Xi’an University Shaanxi Key Laboratory of Surface Engineering and Remanufacturing College of Mechanical and Material Engineering Xi’an710065 China

Terahertz (THz) metasurfaces based on toroidal dipoles exhibit significant potential in biosensing applications. This study presents a polarization-insensitive THz metasurface biosensor designed with a fourfold rotationally symmetric toroidal dipole structure, consisting of a circular ring and four split-ring resonators. By exploiting the low-loss and polarization-insensitive properties of toroidal dipoles, the proposed sensor achieves significant electromagnetic field magnification and high sensitivity of biomolecular detection in the THz regime. Numerical simulation demonstrates a refractive index sensitivity of 721 GHz/RIU, while experimental measurements of cell suspensions indicate a sensitivity of 400 kHz/(cell/mL). The polarization-insensitive response, analyzed through multipole decomposition theory, is attributed to the balanced electromagnetic characteristics of the structure, which ensures consistent excitation of toroidal dipoles and magnetic quadrupoles across different polarization angles. For quantitative analysis, partial least squares (PLS) and support vector regression (SVR) methods are utilized to analyze liver cell lines (HepG2 and Miha), achieving high predictive accuracy with a mean squared error of 0.083. This work circumvents the polarization dependence observed in conventional THz biosensors and proposes an innovative approach for developing high-performance biosensing devices. © 2001-2012 IEEE.

关键词： Electromagnetic fields

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Enhanced Landfill process Based on Leachate Recirculation and Micro-Aeration: A Comprehensive Technical, Environmental and Economic Assessment

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SSRN 2022年

作者： Zhang, Guangming Liu, Kaili Lv, Longyi Gao, Wenfang Ren, Zhijun Yan, Wenyi Li, Weiguang Wang, Pengfei Liu, Xiaoyang Sun, Li Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental Engineering Hebei University of Technology Tianjin300401 China National Key Laboratory of Biochemical Engineering Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China School of Environment Harbin Institute of Technology Harbin150090 China

Landfill is still the main waste treatment method in developing countries. In this study, an enhanced landfill process based on leachate recirculation and micro-aeration is developed to accelerate the stabilization process of landfill. The enhanced process is evaluated by carbon balance, and the results show that more than 60% of the degradable organic carbon in landfill waste can be degraded and converted to gaseous state in a relatively short time. A comprehensive environmental assessment is developed for the enhanced process, and better environmental benefits are obtained from the whole landfill process. By comparing the actual application scenario with the traditional landfill, better economic evaluation and social benefits are achieved. The enhanced process saves time and land acquisition costs, and the reuse of land brings significant social benefits. This study can provide a reference for governmental municipal administrations to carry out the technological transformation of traditional landfills. © 2022, The Authors. All rights reserved.

关键词： Developing countries

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Improved spectral model building for using ATR-FTIR spectroscopy to measure solution concentration during cooling crystallization

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IFAC-PapersOnLine 2022年第7期55卷 833-838页

作者： Jingxiang Liu Tao Liu Yan Cui Xiaojing Pei School of Marine Electrical Engineering Dalian Maritime University Dalian 116026 P. R. China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Dalian 116024 P. R. China Institute of Advanced Control Technology Dalian University of Technology Dalian 116024 P. R. China

To ensure in-situ measurement accuracy on the solution concentration during cooling crystallization process, an improved spectral model building method is proposed in this paper for application of the attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The traditional partial least-squares (PLS) model is modified into a functional regression form for expressing the relationship between the input variables of in-situ measured spectra and the output of solution concentration, so as to address the issue of insufficient samples for model calibration with respect to the high-dimension of spectral variables for measurement. The widely used DB4 wavelet functions are taken as basis functions to approximate the smooth functions in the proposed functional regression model, by virtue of their multi-scale and orthogonal properties to procure good accuracy. Accordingly, a parameter estimation algorithm named wavelet partial-least-squares is proposed for the spectral model calibration. The application to measure the solution concentration of L-glutamic acid (LGA) cooling crystallization process well demonstrates the effectiveness and merit of the proposed method.

关键词： wavelet functional partial least-squares in-situ measurement by ATR-FTIR spectroscopy cooling crystallization process spectral calibration model

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Enhanced Landfill process Based on Leachate Recirculation and Micro-Aeration: A Comprehensive Technical, Environmental and Economic Assessment

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SSRN 2022年

关键词： Developing countries

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Unveiling Atomic Distances Effect in Heterogeneous Photocatalytic Degradation of Aromatic Compound

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SSRN 2023年

作者： Shen, Yi Yang, Jingyi Zhu, Chao Zhang, Haizhong Fang, Qile Liu, Renlan Song, Shuang Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China Advanced Institute of Natural Sciences Beijing Normal University at Zhuhai Zhuhai519087 China College of Life and Environmental Science Wenzhou University Wenzhou325035 China

Atomic-level dispersed metal-N-C frameworks are considered effective materials for the catalytic oxidation of aromatic pollutants. However, the inherent electronic mechanism for the influence of varying anchoring atomic distances on the enrichment and further degradation of aromatic compounds is unclear. Herein, covalent triazine frameworks anchored by Ni single atoms (Ni-SA/CTF), Ni clusters (Ni-AC/CTF), and NiO nanoparticles (Ni-NP/CTF) were constructed as reaction platforms. The results showed that Ni-AC/CTF exhibited the highest adsorption capacity (624.4 μmol g−1) for 2,2′,4,4′-tetrahydroxybenzophenone and the fastest reaction kinetics (3.01 h−1) for Rhodamine B. The experiments and theoretical calculations revealed the interaction between Ni atoms in atomic clusters of Ni-AC/CTF shortens the Ni–N bonds and weakens the asymmetric spin state. These changes cause distortion of benzene ring in pollutant molecules, further promoting the ring cleavage reaction and improving electron delocalization, which synergistically enhance pollutant removal. This study provides a new direction for the development of advanced photocatalytic materials. © 2023, The Authors. All rights reserved.

关键词： Catalytic oxidation

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Distributed Online Convex Optimization with Time-Varying Constraints: Tighter Cumulative Constraint Violation Bounds under Slater's Condition

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IEEE Transactions on Automatic control 2025年

作者： Yi, Xinlei Li, Xiuxian Yang, Tao Xie, Lihua Hong, Yiguang Chai, Tianyou Johansson, Karl H. National Key Laboratory of Autonomous Intelligent Unmanned Systems Shanghai Institute of Intelligent Science and Technology China Ministry of Education Frontiers Science Center for Intelligent Autonomous Systems China Massachusetts Institute of Technology Lab for Information & Decision Systems CambridgeMA02139 United States Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Nanyang Technological University School of Electrical and Electronic Engineering 50 Nanyang Avenue 639798 Singapore Kth Royal Institute of Technology Division of Decision and Control Systems School of Electrical Engineering and Computer Science Sweden Digital Futures Stockholm10044 Sweden

This paper considers distributed online convex optimization with time-varying constraints. In this setting, a network of agents makes decisions at each round, and then only a portion of the loss function and a coordinate block of the constraint function are privately revealed to each agent. The loss and constraint functions are convex and can vary arbitrarily across rounds. The agents collaborate to minimize static network regret and network cumulative constraint violation. A novel distributed online algorithm with a vanishing stepsize is proposed and it achieves an O(Tmax {c,1-c}) static network regret bound and an O(T1-c/2) network cumulative constraint violation bound, where T is the number of rounds and c∈ (0,1) is a user-defined trade-off parameter. When Slater's condition holds (i.e, there is a point that strictly satisfies the inequality constraints), the network cumulative constraint violation bound is reduced to O(T1-c). Moreover, if the loss functions are strongly convex, then static network regret bound is reduced to O(log (T)), and the network cumulative constraint violation bound is reduced to O(√log (T)T) and O(log (T)) without and with Slater's condition, respectively. To the best of our knowledge, this paper is the first to achieve tighter (network) cumulative constraint violation bounds for (distributed) online convex optimization with time-varying constraints under Slater's condition. Finally, the theoretical results are verified through numerical simulations. © 1963-2012 IEEE.

关键词： Convex optimization

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应用物联网技术加速畜禽精准饲喂:从概念到实施

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Science Bulletin 2024年第14期69卷 2156-2160页

作者：苏家宜谭碧娥蒋宗勇吴德 C.M.Nyachoti Sung Woo Kim 印遇龙王婧 Key Laboratory of Hunan Province for the Products Quality Regulation of Livestock and Poultry College of Animal Science and TechnologyHunan Agricultural UniversityChangsha 410128China Institute of Animal Science Guangdong Academy of Agricultural SciencesGuangzhou 510640China Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China and Animal Nutrition InstituteSichuan Agricultural UniversityChengdu 611130China Department of Animal Science University of ManitobaWinnipeg R3T 2N2Canada Department of Animal Science North Carolina State UniversityRaleigh 27695USA Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410128China Yuelushan Laboratory Changsha 410128China

Maximizing sow reproductive performance is vital for ensuring healthy piglet supply,feed efficiency,and profitability,which requires understanding factors such as nutrition,disease control,genetics,herd management,and their *** is well documented that most reproductive issues in sows stem from extreme fluctuations in body reserves[1].Thus,optimizing reproduction should prioritize regulating body reserves and making continuous nutritional adjustments throughout a sow’s life[1,2].However,the traditional one-size-fits-all feeding strategy may not meet individual sow needs under varying *** feeding strategy leads to nutrient under-or over-feeding,which may result in a lack of performance and health issues on the one hand,and economic loss and negative environmental effects on the other.

关键词： feeding extreme reserves

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Comparative Analysis of Different Rice Substrates for Solid-State Fermentation by a Citrinin-Free Monascus Purpureus Mutant Strain with High Pigment Production

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SSRN 2023年

作者： Wang, Yaxu Ye, Fanyu Zhou, Bo Liang, Ying Lin, Qinlu Lu, Dong Zhou, Xiang Liu, Jun Hunan Key Laboratory of Forestry Edible Resources Safety and Processing Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control National Engineering Research Center of Rice and Byproduct Deep Processing Central South University of Forestry and Technology Hunan Changsha410004 China Biophysics Research Laboratory Institute of Modern Physics Chinese Academy of Sciences Lanzhou China

Monascus pigment (MP) is a safe and natural microbial coloring agent. MP and red yeast rice (RYR) play an important role in the food industry. In this study, a citrinin-free Monascus purureus MS-12 with high MP production was generated using dual mutagenesis of atmospheric and room-temperature plasma and heavy ion beam irradiation. The fermentation characteristics of eight rice substrates for solid-state fermentation (SSF) were compared to produce a premium RYR. Indica rice was the optimal fermentation substrate (MP = 4526 U/g in RYR), followed by japonica rice (MP = 3556 U/g). The MP value was © 2023, The Authors. All rights reserved.

关键词： Substrates

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Mechanisms of organic dissolution and toxic release in sludge during anaerobic hydrolysis enhanced by ultrasound-alkaline treatment

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Journal of Water process Engineering 2025年 74卷

作者： Chen, Xiurong Feng, Xiaomin Li, Renjie Song, Meijing Yin, Danning Li, Shuo Ma, Lijuan National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China

The residual sludge is rich in organic matter, nitrogen, phosphorus, and other nutrients. However, due to its poor solubility, its bioavailability is limited, leading to low resource utilization efficiency. Anaerobic hydrolysis of sludge can dissolve cell-bound organic matter, enhancing the resource recovery potential of residual sludge. Under low-intensity ultrasound (60 W) and alkaline (pH = 9) pretreatment, anaerobic hydrolysis of sludge released substantial amounts of TOC, COD, TN, and TP. Hydroquinone, a representative phenolic compound, was selected as the target pollutant to acclimate activated sludge stepwise, simulating the residual sludge after industrial phenolic wastewater treatment. The study found that, compared to the control sludge hydrolysate (methanol-acclimated), the TOC content and organic toxicity of the toxic sludge hydrolysate (hydroquinone-acclimated) were significantly higher. The TOC concentrations in the toxic and control groups were 392.8 ± 19.65 mg/L and 264.44 ± 13.22 mg/L, respectively, with toxicity levels of 69.15 ± 3.46 % and 38.08 ± 1.9 %. By analyzing TOC changes, toxicity differences across molecular weight ranges, and 3D-EEMs spectra, it was found that the organic toxicity of sludge mainly originated from aromatic proteins in the 5-10 kDa range, particularly tryptophan and tyrosine. During anaerobic hydrolysis, dominant microbial communities decompose and utilize sludge organics through metabolic pathways such as amino acid biosynthesis, carbohydrate biosynthesis, glycolysis, respiration, the tricarboxylic acid (TCA) cycle, and amino acid metabolism. This process converts macromolecular substances in sludge into small molecules such as amino acids and monosaccharides, providing a novel strategy for the resource utilization of residual sludge. © 2025 Elsevier Ltd

关键词： Anaerobic hydrolysis High-throughput sequencing Organic toxicity Residual sludge Toxicity reduction

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