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Population transfer via a finite temperature state

Physical Review A 2020年第4期102卷 043714-043714页

作者： Wei Huang Baohua Zhu Wei Wu Shan Yin Wentao Zhang Chu Guo Guangxi Key Laboratory of Optoelectronic Information Processing Guilin University of Electronic Technology Guilin 541004 China School of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 China Department of Physics College of Liberal Arts and Sciences National University of Defense Technology Changsha 410073 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 China

We study quantum population transfer via a common intermediate state initially in thermal equilibrium with a finite temperature T, exhibiting a multilevel stimulated Raman adiabatic passage structure. We consider two situations for the common intermediate state, namely a discrete two-level spin and a bosonic continuum. In both cases we show that the finite temperature strongly affects the efficiency of the population transfer. We also show in the discrete case that strong coupling with the intermediate state, or a longer duration of the controlled pulse, would suppress the effect of finite temperature. In the continuous case, we adapt the thermofield-based chain-mapping matrix product states algorithm to study the time evolution of the system plus the continuum under time-dependent controlled pulses, which shows great potential to be used to solve open quantum system problems in quantum optics.

关键词： Coherent control Stimulated Raman adiabatic passage Density matrix methods

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Reverse time migration imaging of tunnels via the finite element method using an unstructured mesh

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Applied Geophysics 2020年第2期17卷 267-276,316页

作者： Wang Jing Liu Jiang-Ping Cheng Fei Yang Huai-Jie Huang Yi-Fan School of Civil Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University) Ministry of EducationShijiazhuang 050043China Hebei Technology and innovation center on safe and efficient mining of metal mines Shijiazhuang Tiedao UniversityShijiazhuang 050043China Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China College of Marine Science and Technology China University of GeosciencesWuhan 430074China Beijing Research Institute of Uranium Geology Beijing 100029China

Wavefield extrapolation is critical in reverse time migration(RTM).The finite diff erence method is primarily used to achieve wavefi eld extrapolation in case of the RTM imaging of ***,complex tunnel models,including those for karsts and fault fracture zones,are constructed using regular grids with straight curves,which can cause numerical dispersion and reduce the imaging *** this study,wavefi eld extrapolation was conducted for tunnel RTM using the finite element method,wherein an unstructured mesh was considered to be the body-fi tted partition in a complex ***,a Poynting vector calculation equation suitable for the unstructured mesh considered in the fi nite element method was established to suppress the interference owing to low-frequency *** tunnel space was considered during wavefi eld extrapolation to suppress the mirror artifacts based on the fl exibility of mesh ***,the infl uence of the survey layouts(one and two sidewalls)on the tunnel imaging results was *** RTM results obtained for a simple tunnel model with an inclined interface demonstrate that the method based on unstructured meshes can effectively suppress the low-frequency noise and mirror artifacts,obtaining clear imaging ***,the two-sidewall tunnel survey layout can be used to accurately obtain the real position of the inclined interface ahead of the tunnel *** complex tunnel numerical modeling and actual data migration results denote the eff ectiveness of the fi nite element method in which an unstructured mesh is used.

关键词： Tunnel advanced prediction fi nite element method unstructured mesh Poynting vector mirror artifacts

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Neoantigens combined with in situ cancer vaccination induce personalized immunity and reshape the tumor microenvironment

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Nature communications 2025年第1期16卷 5074页

作者： Kuanhan Feng Xinru Zhang Jiale Li Mingzhi Han Jinghuang Wang Fucai Chen Zhiwen Yi Liuqing Di Ruoning Wang School of Pharmacy Jiangsu Provincial TCM Engineering Technology Research Center of High Efficient Drug Delivery System Nanjing University of Chinese Medicine Nanjing 210023 China. State Key Laboratory on Technologies for Chinese Medicine Pharmaceutical Process Control and Intelligent Manufacture Nanjing University of Chinese Medicine Nanjing 210023 China. Department of Neurosurgery Qilu Hospital Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science Shandong University Jinan 250012 China. School of Pharmacy Jiangsu Provincial TCM Engineering Technology Research Center of High Efficient Drug Delivery System Nanjing University of Chinese Medicine Nanjing 210023 China. ruoningw@***. State Key Laboratory on Technologies for Chinese Medicine Pharmaceutical Process Control and Intelligent Manufacture Nanjing University of Chinese Medicine Nanjing 210023 China. ruoningw@***.

Neoantigen (nAg) vaccines can induce anti-tumor specific immunity, and tumor killing promotes further antigen diffusion, which is expected to improve prognosis. However, the mutation of cancer cells under the selective pressure of vaccines and the immunosuppressive tumor microenvironment make the therapeutic effect unsatisfactory. Here, we develop a nanovaccine (nAg-MRDE/Mn) that can deliver nAg and induce in situ cancer vaccination to synergistically promote a personalized immune response, enhance antigen diffusion, and improve the microenvironment by modulating immunosuppressive cells and activating the innate immune response. Experiments show that nAgs are presented by dendritic cells and expressed by T cells, which cooperate with in situ vaccination to stimulate specific immunity. Cells involved in immunosuppression, such as M2 macrophages and regulatory T cells, are down-regulated, while M1 macrophages and natural killer cells are increased. In addition, the hydrogel loaded with chemokines and nAg-MRDE/Mn inhibits postoperative tumor recurrence, and the combination of nAg-MRDE/Mn and αPD-1 improves the therapeutic effect of αPD-1. This study validates the clinical potential of this strategy and provides ideas for improving neoantigen vaccines.

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Parameter Self-Tuning of SISO Compact-Form Model-Free Adaptive controller based on Neural Network with System Error Set as Input

Parameter Self-Tuning of SISO Compact-Form Model-Free Adapti...

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Asian control Conference

作者： Chen CHEN Xueyuan LI Ye YANG Jiarong XU Zuwei LIAO Xinggao LIU Jinshui CHEN Jiangang LU State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou Zhejiang China State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou Zhejiang China Yuyao Technology Innovation Center Robotics Institute of Zhejiang University Ningbo Zhejiang China

ISBN: (纸本)9781728102634

Model-Free Adaptive control (MFAC) is a new data-driven control method, which depends only on the input/output (I/O) measurement data rather than the mathematical model information of the actual controlled system. The SISO MFAC based on the compact-form dynamic linearization (SISO-CFMFAC) is a promising approach to control the SISO nonlinear systems. However, the parameters in the SISO-CFMFAC should be tuned carefully before being put into use. Unfortunately, so far the parameter tuning of SISO-CFMFAC is still a laborious, time-consuming and cost-consuming work. In this paper, a novel parameter self-tuning approach of SISO-CFMFAC based on back propagation Neural Network with System Error set as input (SISO-CFMFAC-NNSE) is proposed, and then verified by using a typical time-varying nonlinear SISO system. Results show that the proposed controller named SISO-CFMFAC-NNSE can achieve better control stability and accuracy than the existing controller of SISO-CFMFAC.

关键词： Tuning Data models Neural networks Nonlinear dynamical systems Adaptation models control systems

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Rapid spectrophotometric determination of permanganate index (COD_Mn) in water by 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS)

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Journal of Water Process engineering 2025年 75卷

作者： He, Linfeng Yan, Zhongda Huang, Geng Yu, Xuewei Li, Jianhang Zou, Jing Sun, Bo Miu, Liu Yang, Zhimin Tan, Haoqiang Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control College of Civil Engineering Huaqiao University Fujian Xiamen 361021 China China National & Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution School of Life and Environmental Science Wenzhou University Zhejiang Wenzhou 325035 China Xiamen Academy of Environmental Science Fujian Xiamen 361021 China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University Jiangsu Nanjing 210098 China Xiamen Municipal Water Testing Co. Ltd Fujian Xiamen 361011 China Instrumental Analysis Center Huaqiao University Fujian Xiamen 361021 China School of Civil Engineering and Architecture Taizhou University Zhejiang Taizhou 318000 China

In this study, a novel and rapid spectrophotometric method for accurately measuring permanganate index (CODMn) in water samples was developed using 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS) as an indi... 详细信息

In this study, a novel and rapid spectrophotometric method for accurately measuring permanganate index (COD_Mn) in water samples was developed using 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS) as an indicator. Under acidic conditions, ABTS is rapidly oxidized by residual potassium permanganate in the digest solution, forming a stable green ABTS^•+ radical within just 20 s. Subsequently, ABTS^•+ can be accurately quantified by visible spectrophotometry at a wavelength of 415 nm. In the range of 0 to 4.46 mg/L, the absorbance change of ABTS^•+ at 415 nm showed a strong linear relationship with the concentration of COD_Mn (R² = 0.999). The method has high sensitivity, with a low limit of detection for COD_Mn of 0.010 mg/L. It is worth noting that the ABTS method is resistant to chloride ion interference and demonstrates high accuracy when applied to real water samples, with recovery rates ranging from 98.59 % to 99.93 %. Compared to the national standard titration method and other previously reported spectrophotometric methods, the ABTS method is simpler and more environmentally friendly. In conclusion, the proposed ABTS spectrophotometric method represents a promising approach for the accurate and rapid determination of COD_Mn in water, providing a feasible alternative to traditional methods for COD_Mn determination. © 2025 Elsevier Ltd

关键词： ABTS Oxidative coloration Permanganate index Spectrophotometric determination

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Cutting force and tool wear in cutting Ti-6Al-4V using microstructure-based PCD turning tools

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Procedia CIRP 2020年 95卷 572-577页

作者： Kai Jiang Xiaoyu Wu Jianguo Lei Bin Xu Likuan Zhu Yongxin Cao Kangsen Li Dengji Guo Yonghua Zhao Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control Engineering Shenzhen University Nan-hai Ave 3688 Shenzhen 518060 Guangdong China Southern University of Science and Technology Department of Mechanical and Energy Engineering Room505 Chuangyuan No.7 No. 1088 Xueyuan Rd. Nanshan Shenzhen Guangdong 518055 China

Titanium and its alloys have been widely applied in surgical, aerospace, and medicine because of its high corrosion resistance, strength, heat resistance, and high compatibility with composite structures. However, due to the small cutting deformation coefficient and severe cold hardening phenomenon of titanium alloy, high stress and temperature can easily occur near the cutting edge during machining, which caused chips to adhere to the surface of tools and accelerated tool wear. In order to reduce cutting force and tool wear, researchers have attempted to fabricate microstructures on the tool by grinding, lithography, etching, and other technologies to improve lubrication condition between tools and chips. However, these processes were limited to certain conditions. In this paper, three-dimensional (3D) laminated microelectrodes were used to fabricate various microstructures on polycrystalline diamond (PCD) turning tools by micro-electrical discharge machining (micro-EDM). Moreover, microstructure-based PCD turning tools were used to perform cutting experiments on titanium alloy. During this process, the cutting force of PCD turning tools were measured by force measuring device, and chips were collected and observed. After that, the friction coefficient and tool wear of PCD tools with different microstructures were measured. The experimental results show that microstructures on the rake face of PCD turning tools can effectively reduce friction coefficient for cutting titanium alloy, thus reducing cutting force and tool wear. The type and size of microstructures also affect cutting force and tool wear: the smaller size of microstructure, the smaller values of cutting force and tool wear.

关键词： Laminated microelectrode microstructures cutting force friction coefficient tool wear

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control method for EV charging and discharging in V2G/V2H scenario based on the synchronvter technology and H∞ repetitive control

Control method for EV charging and discharging in V2G/V2H sc...

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作者： Liu, Dongqi Zeng, Xiangjun Liu, Guorong Hunan Province Key Laboratory of Smart Grids Operation and Control Changsha University of Science and Technology Changsha China College of Electrical and Information Engineering Hunan University Changsha China School of Computer and Communication Hunan Institute of Engineering Xiangtan China

Electric vehicles (EVs) will play a vital role in the future's transportation systems since this technology is promising for environment, energy security, and improved fuel economy. EVs have huge potential of serving as the energy storage for the power grid as well as inhabitants in vehicle-to-grid (V2G) or vehicle-to-house (V2H) scenario. In this study, a control method is proposed for EV charging and discharging by using the synchronverter technology and H∞ repetitive controller, where synchronverter technology is used to generate the reference voltage to decide the power angle and amplitude of the AC side voltage of the charging/discharging port, so that the power flow between EV and the grid is controlled. In order to ensure the power quality of EVs provided for the grid and the load while EVs are with local loads, a H∞ repetitive controller is designed to control the voltage between EVs and the grid to follow the reference voltage. Simulation results have shown that the proposed controller is not only able to realise bi-directional real power and reactive power control, but also keep the output voltage of EVs in V2G or V2H scenario stable and clear while they are with different kinds of local loads. © 2019 Institution of engineering and *** right reserved.

关键词： Fuel economy

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Economical iron-nickel bimetallic electrocatalysis enhanced chlorine evolution for ammonia removal in wastewater

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Electrochimica Acta 2025年 534卷

作者： Zhiyong Zhang Aixing Chen Ming-Lai Fu Wenjie Sun Huachun Lan Baoling Yuan Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 PR China Xiamen Engineering & Technology Research Center for Urban Water Environment Planning and Remediation College of Civil Engineering Huaqiao University Xiamen Fujian 361021 PR China Department of Atmospheric and Hydrologic Science St. Cloud State University 720 4th Avenue South St. Cloud MN 56301 USA Key Laboratory of Songliao Aquatic Environment Ministry of Education School of Municipal and Environmental Engineering Jilin Jianzhu University Changchun 130118 PR China

The electrocatalytic removal of ammonia nitrogen (NH 4 + -N) in wastewater is a promising technology for water treatment, but the high cost and limited catalytic efficiency of traditional electrodes present challenges. This study introduces a novel iron-nickel composite oxide electrode (FeNiO/GP) supported on graphite, achieving breakthrough performance in NH 4 + -N wastewater remediation. It exhibited dual enhancement in chlorine evolution reaction (CER) selectivity and oxygen evolution reaction (OER) suppression, as evidenced by an exceptional 0.212 V potential gap between OER (1.48 V) and CER (1.27 V). Through systematic optimization, the electrode demonstrates unparalleled removal efficiencies of 99.56 % NH 4 ⁺-N and 92.09 % TN within 40 min under controlled conditions, maintaining robust performance (88.68 % NH 4 ⁺-N, 70.52 % TN removal) in real industrial wastewater. Mechanistic investigations reveal a self-sustaining chlorine cycle, where in-situ generated active chlorine species drive ammonia oxidation. This work establishes a new paradigm for non-precious metal electrocatalysts in sustainable wastewater treatment, achieving high reaction kinetics with low energy consumption. The FeNiO/GP electrode is an effective and low-cost solution for ammonia nitrogen removal, offering significant potential for practical wastewater treatment applications.

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The study and engineering application on adaptive leveling of vehicle platform 7

The study and engineering application on adaptive leveling o...

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7th International Conference on Advances in Construction Machinery and Vehicle engineering, ICACMVE 2019

作者： Wang, Jianjun Zhao, Jingyi Li, Wenlei Cai, Wei Wang, Yongchang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qmhuangdao Hebei066004 China Department of Mechanical Engineering Anhm Technical College of Mechanical and Electrical Engineering Wuhu Anhui241002 China Key Laboratory of Advanced Forging & Stamping Technology and Science Qmhuangdao Hebei066004 China College of Mechanical Engineering Yanshan University Qmhuangdao Hebei066004 China Hebei Key Laboratory of Special Delivery Equipment Qmhuangdao Hebei066004 China

ISBN: (纸本)9781728139050

Leveling control of bearing platform of large engineering transport vehicle is very important for the safety and reliability of transportation. The leveling method of the load-bearing platform of the transporter is studied. According to the actual working conditions, through the force analysis of the load-bearing platform and the calculation method of the load center of gravity, the allowable loading area for the anti-overturning of the engineering transporter under the condition of four-point support is put forward. An adaptive electro-hydraulic leveling system based on four-point support is designed, and four groups of suspension hydraulic system are simplified as a single-support system model. The hydraulic system is built by AMESim software, and the control system is built by MATLAB software, Then the feasibility of the leveling control system is verified through the simulation. The results show that the control strategy has better precision and shorter reaction time, and is more suitable for vehicle leveling control system. On this basis, And the electro-hydraulic leveling control system was designed for the 100 tons of hydraulic truck of an enterprise, double-axis tilt sensor is used to monitor the level of the platform in real time, and the controller can make the suspension hydraulic cylinders act accordingly to keep the platform level. Finally, the actual vehicle leveling experiment is carried out, and the experiments of load sharing and unbalanced load lifting are carried out respectively. It is found that the leveling accuracy can be controlled within 0.25 degrees, which fully meets the engineering application and can provide reference for the development of similar systems. © 2019 IEEE.

关键词： MATLAB

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Correction to: Identification of Size-segregated Bioaerosol Community and Pathogenic Bacteria in a Tunnel-ventilated Layer House: Effect of Manure Removal

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Water, Air, & Soil Pollution 2022年第6期233卷 1-1页

作者： Dai, Xiaorong Wang, Xiaoshuai Wang, Ailun Bao, Peng Wang-Li, Lingjuan Xiao, Hang Wang, Kaiying Center for Excellence in Regional Atmospheric Environment & Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in Beilun Ningbo China College of Biosystems Engineering and Food Science Zhejiang University Hangzhou China Department of Biological and Agriculture Engineering North Carolina State University Raleigh USA

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