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Science China Chemistry 2022年第1期65卷 7-19页

作者： Jiangyan wang Zumin wang dan Mao Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Hollow multishelled structure(HoMS)is one of the most promising multifunctional structures.The high complexity of its structure makes the general and controllable synthesis of HoMS rather challenging.By integration of multidisciplinary knowledge,a great achievement in HoMSs has been obtained in the past decade.Especially,the developed sequential templating approach has significantly boomed the progress of HoMS in composition and structure diversity and application area.The implementation of the temporal-spatial ordering in HoMS makes it indispensable in solving the key scientific problems in energy conversion,catalysis and drug delivery areas.Further development in HoMSs with novel intricate structures will bring new understandings.In this review,we systematically introduce the development history of HoMSs,summarize the inspiration inherited from the previous research on hollow structures,and discuss the milestones in the development of HoMSs,with a focus on the sequential templating approach for HoMS fabrication,attractive temporal-spatial ordering property and dynamic smart behavior for advanced applications.We hope to reveal the inherent relationship between the precise synthesis of HoMS and its highly tunable compositional and structural characteristics,and point out its future direction to boost HoMS area further.

关键词： hollow multishelled structure sequential templating approach temporal-spatial ordering smart dynamic behavior

Constructing BaTiO_(3)/TiO_(2)@polypyrrole composites with hollow multishelled structure for enhanced electromagnetic wave absorbing properties

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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 581-590页

作者： dan Mao Zhen Zhang Mei Yang Zumin wang Ranbo Yu Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Department of Energy Storage Science and Engineering School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China

BaTiO_(3)/TiO_(2)@polypyrrole(PPy)composites with hollow multishelled structure(HoMS)were constructed to enhance the electromagnetic wave absorbing properties of BaTiO_(3)-based absorbing material.BaTiO_(3)/TiO_(2)HoMSs were prepared by hydrothermal crystallization using TiO_(2)Ho MSs as template.Then,FeCl3 was introduced to initiate the oxidative polymerization of pyrrole monomer,forming BaTiO_(3)/TiO_(2)@PPy HoMSs successfully.The electromagnetic wave absorbing properties of BaTiO_(3)/TiO_(2)HoMSs and BaTiO_(3)/TiO_(2)@PPy Ho MSs with different shell number were investigated using a vector network analyzer.The results indicate that BaTiO_(3)/TiO_(2)@PPy HoMSs exhibit improved microwave absorption compared with BaTiO_(3)/TiO_(2)HoMSs.In particular,tripled-shelled BaTiO_(3)/TiO_(2)@PPy HoMS has the most excellent absorbing performance.The best reflection loss can reach up to-21.80 dB at 13.34 GHz with a corresponding absorber thickness of only 1.3 mm,and the qualified absorption bandwidth of tripled-shelled BaTiO_(3)/TiO_(2)@PPy HoMS is up to 4.2 GHz.This work paves a new way for the development of high-performance composite microwave absorbing materials.

关键词： BaTiO_(3)/TiO_(2)@polypyrrole composites hollow multishelled structure electromagnetic wave absorbing

Metabolic reprogramming in the immunosuppression of tumor-associated macrophages

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Chinese Medical Journal 2022年第20期135卷 2405-2416页

作者： Ying wang Dan Wang Li Yang Yi Zhang Biotherapy Center and Cancer Center The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China School of Life Sciences Zhengzhou UniversityZhengzhouHenan 450001China Henan Key Laboratory for Tumor Immunology and Biotherapy ZhengzhouHenan 450052China State Key Laboratory of Esophageal Cancer Prevention&Treatment Zhengzhou UniversityZhengzhouHenan 450052China

Tumor-associated macrophages(TAMs)are an essential proportion of tumor-infiltrating immune cells in the tumor microenvironment(TME)and have immunosuppressive functions.The high plasticity and corresponding phenotypic transformation of TAMs facilitate oncogenesis and progression,and suppress antineoplastic responses.Due to the uncontrolled proliferation of tumor cells,metabolism homeostasis is regulated,leading to a series of alterations in the metabolite profiles in the TME,which have a commensurate influence on immune cells.Metabolic reprogramming of the TME has a profound impact on the polarization and function of TAMs,and can alter their metabolic profiles.TAMs undergo a series of metabolic reprogramming processes,involving glucose,lipid,and amino acid metabolism,and other metabolic pathways,which terminally promote the development of the immunosuppressive phenotype.TAMs express a pro-tumor phenotype by increasing glycolysis,fatty acid oxidation,cholesterol efflux,and arginine,tryptophan,glutamate,and glutamine metabolism.Previous studies on the metabolism of TAMs demonstrated that metabolic reprogramming has intimate crosstalk with anti-tumor or pro-tumor phenotypes and is crucial for the function of TAMs themselves.Targeting metabolism-related pathways is emerging as a promising therapeutic modality because of the massive metabolic remodeling that occurs in malignant cells and TAMs.Evidence reveals that the efficacy of immune checkpoint inhibitors is improved when combined with therapeutic strategies targeting metabolism-related pathways.In-depth research on metabolic reprogramming and potential therapeutic targets provides more options for anti-tumor treatment and creates new directions for the development of new immunotherapy methods.In this review,we elucidate the metabolic reprogramming of TAMs and explore how they sustain immunosuppressive phenotypes to provide a perspective for potential metabolic therapies.

关键词： Immune checkpoint inhibitors Immunosuppression Metabolism Tumor-associated macrophages Tumor microenvironment

Progress and Perspectives of Hollow Multishelled Structures

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Chinese Journal of Chemistry 2022年第10期40卷 1190-1203页

作者： Jiangyan wang Mei Yang Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Hollow multishelled structure(HoMs)has drawn tremendous attention due to its abundant attractive properties and promising applications.However,for a long time,the limited synthesis method hindered the development of HoMs.The sequential templating approach developed by our group,has greatly enriched its composition and'structure diversity.The progress in HoMS synthesis promotes the discovery of its characteristics as well as widens its application area.Typicall,the recently explored temporal-spatial ordering characteristic of HoMS has shown great promise in drug delivery and cascade catalysis application areas.Here,we summarize the current development progress of HoMS in the aspects of both synthesis and application,with a focus discussion on how to shape its application performance by manipulating its composition and structure features.In addition,we discuss the current challenges and providethe future potentials holdingfor HoMs.

关键词： Hollow multishelled structure Sequential templating approach Temporal-spatial ordering Catalysis Structure-activity relationships

Evaluation of the relative differences in building energy simulation results

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Building Simulation 2022年第11期15卷 1977-1987页

作者： Dan Wang Xiufeng Pang Wei wang Chuan Wan Gang wang Institute of Building Environment and Energy China Academy of Building ResearchBeijing 100013China Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of TechnologyBeijing 100124China National Engineering Research Center of Building Technology Beijing 100013China Beijing Institute of Petrochemical Technology No.19 Qingyuan RoadDaxing DistrictBeijing 102627China Department of Civil Architectural and Environmental EngineeringUniversity of MiamiMiamiFL 33146USA

Building energy modeling,also known as building energy simulation,has developed rapidly in recent years and plays a crucial role in building life-cycle analysis.It can be employed in the design phase to predict the energy consumption of different design schemes and evaluate various control and retrofitting measures at the operation stage.In such simulations,it is commonly understood and accepted that the simulated relative differences are more reliable than the predictions of absolute energy results.However,whether this common understanding is true is yet to be thoroughly investigated.In this study,we investigate the simulated relative differences and the extent to which they are affected by the degree of model input deviation.Simulation and Monte Carlo approaches are adopted for the analysis.The results indicate that the simulated relative differences are not as reliable as expected,and the outputs strongly depend on the degree of the model input deviation.When the degree of deviation is less than 15%or the model inputs are within reasonable ranges,the simulated relative differences match the baseline obtained using Monte Carlo simulations.Moreover,the model’s error indicators meet the requirements of the ASHRAE Guideline 14–2014 when the degree of input deviation is below 15%.

关键词： simulated relative differences building energy simulation Monte Carlo simulation EnergyPlus

Secure and reliable computation offloading in blockchain-assisted cyber-physical IoT systems

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Digital Communications and Networks 2022年第5期8卷 625-635页

作者： Dan Wang Bin Song Yingjie Liu Mingjun wang The State Key Laboratory of Integrated Services Networks Xidian UniversityXi'an710071China

With the development of the Cyber-Physical Internet of Things System(CPIoTS),the number of Cyber-Physical System(CPS)applications accessed in networks has increased dramatically.Latency-sensitive resource orchestration in CPS applications is extraordinarily essential for maintaining the Quality of Experience(QoE)for users.Although edge-cloud computing performs effectively in achieving latency-aware resource allocation in CPIoTS,existing methods fail to jointly consider the security and reliability requirements,thereby increasing the process latency of tasks and degrading the QoE of users.This paper aims to minimize the system latency of edge-cloud computing coupled with CPS while simultaneously considering the security and reliability requirements.We first consider a time-varying channel model as a Finite-State Markov Channel(FSMC)and propose a distributed blockchain-assisted CPIoTS to realize secure consensus and reliable resource orchestration by offloading computation tasks in edge-cloud computing.Moreover,we propose an efficient resource allocation algorithm,PPO-SRRA,that optimizes computing offloading and multi-dimension resource(e.g.,communication,computation,and consensus resource)allocation by using a policy-based Deep Reinforcement Learning(DRL)method.The experimental results show that the proposed resource allocation scheme can reduce the system latency and ensure consensus security.

关键词： Cyber-physical internet of things system Blockchain Reinforcement learning(RL) Edge-cloud computing

H∞-Based Selective Inversion of Nonminimum-phase Systems for Feedback Controls

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 702-710页

作者： Dan Wang Xu Chen Department of Mechanical Engineering University of WashingtonSeattleWA 98195 USA IEEE

Stably inverting a dynamic system model is fundamental to subsequent servo designs. Current inversion techniques have provided effective model matching for feedforward controls.However, when the inverse models are to be implemented in feedback systems, additional considerations are demanded for assuring causality, robustness, and stability under closed-loop constraints. To bridge the gap between accurate model approximations and robust feedback performances, this paper provides a new treatment of unstable zeros in inverse design. We provide first an intuitive pole-zero-map-based inverse tuning to verify the basic principle of the unstable-zero treatment. From there, for general nonminimum-phase and unstable systems, we propose an optimal inversion algorithm that can attain model accuracy at the frequency regions of interest while constraining noise amplification elsewhere to guarantee system robustness. Along the way, we also provide a modern review of model inversion techniques. The proposed algorithm is validated on motion control systems and complex high-order systems.

关键词： H∞formulation model inversion nonminimum-phase zeros unstable systems

MicroRNA-101a-3p mimic ameliorates spinal cord ischemia/reperfusion injury

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Neural Regeneration Research 2022年第9期17卷 2022-2028页

作者： Zai-Li Zhang Dan Wang Feng-Shou Chen Department of Anesthesiology the First Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

miR-101a-3p is expressed in a variety of organs and tissues and plays a regulatory role in many diseases,but its role in spinal cord ischemia/reperfusion injury remains unclear.In this study,we established a rat model of spinal cord ischemia/reperfusion injury by clamping the aortic arch for 14 minutes followed by reperfusion for 24 hours.Results showed that miR-101a-3p expression in L4-L6 spinal cord was greatly decreased,whereas MYCN expression was greatly increased.Dual-luciferase reporter assay results showed that miR-101a-3p targeted *** immunoreactivity,which was primarily colocalized with neurons in L4-L6 spinal tissue,greatly increased after spinal cord ischemia/reperfusion injury.However,intrathecal injection of an miR-101a-3p mimic within 24 hours before injury decreased MYCN,p53,caspase-9 and interleukin-1βexpression,reduced p53 immunoreactivity,reduced the number of MYCN/NeuN-positive cells and the number of necrotic cells in L4-L6 spinal tissue,and increased Tarlov scores.These findings suggest that the miR-101a-3p mimic improved spinal ischemia/reperfusion injury-induced nerve cell apoptosis and inflammation by inhibiting MYCN and the p53 signaling pathway.Therefore,miR-101a-3p mimic therapy may be a potential treatment option for spinal ischemia/reperfusion injury.

关键词： apoptosis caspase-9 inflammation interleukin-1β microRNA-101a-3p MYCN nerve cells p53 spinal cord ischemia/reperfusion injury

Decoding lithium batteries through advanced in situ characterization techniques

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 965-989页

作者： Mei Yang Ruyi Bi Jiangyan wang Ranbo Yu Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 10049China Department of Energy Storage Science and Engineering School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Given the energy demands of the electromobility market,the energy density and safety of lithium batteries(LBs)need to be improved,whereas its cost needs to be decreased.For the enhanced performance and decreased cost,more suitable electrode and electrolyte materials should be developed based on the improved understanding of the degradation mechanisms and structure–performance correlation in the LB system.Thus,various in situ characterization technologies have been developed during the past decades,providing abundant guidelines on the design of electrode and electrolyte materials.Here we first review the progress of in situ characterization of LBs and emphasize the feature of the multi-model coupling of different characterization techniques.Then,we systematically discuss how in situ characterization technologies reveal the electrochemical processes and fundamental mechanisms of different electrode systems based on representative electrode materials and electrolyte components.Finally,we discuss the current challenges,future opportunities,and possible directions to promote in situ characterization technologies for further improvement of the battery performance.

关键词： in situ characterization techniques multi-modal coupling lithium batteries electrochemical mechanism

Safety-Critical Model-Free Control for Multi-Target Tracking of USVs with Collision Avoidance

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1323-1326页

作者： Shengnan Gao Zhouhua Peng Haoliang wang Lu Liu Dan Wang School of Marine Electrical Engineering Dalian Maritime UniversityDalian 116026China School of Marine Engineering Dalian Maritime UniversityDalian 116026China IEEE

Dear editor,This letter addresses the multi-target tracking of underactuated unmanned surface vehicles(USVs)subject to multiple stationary/moving obstacles.The kinetic model parameters of each USV are totally unknown.A safety-critical model-free control method is proposed for tracking multiple targets with a collision-free containment formation.Specifically,a distributed containment extended state observer(DCESO)is designed to estimate the convex hull spanned by the multiple targets.At the kinematic level,a collision-free kinematic guidance law is presented using a control barrier function(CBF)and an extended state observer for each follower USV.At the kinetic level,a model-free position tracking control law by using an adaptive ESO(AESO)is presented for each follower USV.By the designed safety-critical model-free control method,cooperative tracking of multiple targets under multiple stationary/moving obstacles can be achieved using completely unknown kinetic model parameters.Simulations are provided to illustrate the efficacy of the proposed safety-critical model-free control method for a fleet of USVs.

关键词： stationary collision totally