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Alcohol-assisted hydrodeoxygenation as a sustainable and cost-effective pathway for biomass derivatives upgrading

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Journal of Energy Chemistry 2022年第10期31卷 133-159,I0004页

作者： hao xu hao Li National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China

Hydrodeoxygenation(HDO)is one of the most promising strategies for the upgrading of biomass-derived compounds to chemicals and ***,the conventional HDO process accompanied by insecure high-pressure H_(2)leads to the hefty infrastructure cost on the industrial scale and inevitably trigger overall hydrogenation which is considered as an uncontrollable and risky ***,the developments of alcohol-assisted HDO can be viewed as a sustainable and cost-effective *** review critically summarizes the potentials and challenges of alcohol-assisted strategy from diverse perspectives including safety,economics and catalytic *** on the discrepancies of in-situ hydrogen generation,the alcohol-assisted strategy is divided into combined reforming-HDO route and catalytic transfer hydrogenation/hydrogenolysis(CTH)***,describe different catalytic behaviors and elaborate their applications among several upgrading processes of representative biomass model compounds,aiming to illustrate their potentials in biomass *** influence of alcohols is highlighted because they act both hydrogen donor and *** last,the current challenges and perspectives of alcohol-assisted HDO are proposed for further development and improvement.

关键词： Alcohol-assisted Hydrodeoxygenation Biomass Hydrogen donor Solvent

Research on technology of desktop virtualization based on SPICE protocol and its improvement solutions

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Frontiers of Computer Science 2014年第6期8卷 885-892页

作者： Yuqing LAN hao xu School of Computer Science and Engineering Beihang University Beijing 100191 China

Increasingly mature cloud computing technology promotes virtual desktop technology, which can solve many problems existing in traditional computing models. However, virtual desktop solutions introduce the thorny problem of how to deliver a real desktop experience to users, as if they are using it locally, especially when playing video. The SPICE （simple protocol for independent computing environments） virtual desktop solution provides several image compression algorithms to address this problem with the purpose of making virtual desktops as real as possible. Although different compression algorithms can contribute their own abilities to different images to a large extent, switching between them is a big problem that consumes a large amount of resources to detect the different type of image and also causes jitter of the virtual desktop. This paper proposes a new solution, called SPICEx, using the JPEG2000 compression algorithm with dynamic compression ratios to solve the problem and finally validates that the performance is better than that of SPICE. With better quality of user experience and also reducing bandwidth consumption, SPICEx solution is meaningful in virtual desktop fields and can be widely used.

关键词： virtual desktop SPICE compression algorithm JPEG2000 SPICEx

New progress in zeolite synthesis and catalysis

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National Science Review 2022年第9期9卷 102-119页

作者： hao xu Peng Wu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University

The rational design synthesis of zeolite catalysts with effective,environmentally benign and atom-economic routes is a major topic in the field of microporous materials,as it would avoid the high labor cost and inefficiency of traditional trial-and-error methods in developing new structures and dispel environmental concerns regarding the industrial mass production of *** applications of zeolite materials have expanded from conventional single functionalities,such as solid acids or selective oxidation catalysts to bi/multifunctionalities through combination with metals or metal *** is a response to new re quirements from petro chemical and fine chemical industries,such as precise control of product distribution,conversion of low-carbon resources for chemical production,and solutions to increasingly severe environmental problems related to CO2and ***,based on the systematic knowledge of zeolite chemistry and science that researchers have acquired in the past half-century and the development re quirements,remarkable progress has been made in zeolite synthesis and catalysis in the past 10 *** includes the manipulation of zeolitic monolayers derived from layered zeolites and germanosilicates to construct novel zeolite materials and effective and green zeolite syntheses as well as the synergistic interaction of zeolites and metal/metal oxides with different space distributions in the conversion of low-carbon *** many zeolite catalysts and catalytic processes being developed,our understanding of the close relationship between zeolite synthesis,structure and catalytic properties has *** are gradually approaching the goal of rationally designing zeolite catalysts with precisely controlled activity and selectivity for particular applications.

关键词： layered zeolite germanosilicates green synthesis fast synthesis bifunctional catalytic system metal confined in zeolite

Practical Diagnostic Criterion of Blood Stasis Syndrome

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Chinese Journal of Integrative Medicine 2017年第4期23卷 243-244页

作者： xu, hao Activating Blood Circulation Committee of Chinese Association of Integrative Medicine

The study of ＂Practical Diagnostic Criterion ofBlood Stasis Syndrome （PDCBSS）＂ was supportedby the National Key Science and TechnologyProgram--Clinical Experience and Academic IdeaResearch of Famous Doctors （Prof. CHEN Ke-ji）of Traditional Chinese Medicine （TCM） during theTwelfth Five-Year Plan period （No. 2013BAl13B01）.

关键词： Practical Diagnostic Criterion Blood Stasis Syndrome

Exact mobility edges and topological phase transition in two-dimensional non-Hermitian quasicrystals

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 82-90页

作者： Zhi-hao xu xu Xia Shu Chen Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Liyang 213300China

The emergence of the mobility edge(ME)has been recognized as an important characteristic of Anderson *** difficulty in understanding the physics of the MEs in three-dimensional(3 D)systems from a microscopic image encourages the development of models in lower-dimensional systems that have exact *** most of the previous studies are concerned with one-dimensional(1 D)quasiperiodic systems,the analytic results that allow for an accurate understanding of two-dimensional(2 D)cases are *** this work,we disclose an exactly solvable 2 D quasicrystal model with parity-time(PT)symmetry displaying exact *** the thermodynamic limit,we unveil that the extended-localized transition point,observed at the PT symmetry breaking point,is topologically characterized by a hidden winding number defined in the dual *** coupling waveguide platform can be used to realize the 2 D non-Hermitian quasicrystal model,and the excitation dynamics can be used to detect the localization features.

关键词： quasicrystals mobility edges non-Hermitian systems localization properties

Super-tough and rapidly self-recoverable multi-bond network hydrogels facilitated by 2-ureido-4[1H]-pyrimidone dimers

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Chinese Chemical Letters 2021年第1期32卷 521-524页

作者： hao xu xu-Ming Xie Key Laboratory of Advanced Materials(MOE) Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Multi-bond network(MBN) hydrogels contain hierarchical dynamic bonds with different bond association energy as energy dissipation units,enabling super-tough mechanical *** this work,we copolymerize a protonated 2-ureido-4[1 H]-pyrimidone(UPy)-contained monomer with acrylic acid in HCl *** removing excess HCl,UPy motifs are deprotonated and from dimers,thus generating an UPy-contained MBN *** obtained MBN hydrogels(75 wt% watercontent) exhibit super-tough mechanical properties(0.39 MPa to 2.51 MPa tensile strength),with tremendous amount of energy(1.68 MJ/m^(3) to 11.1 MJ/m^(3)) dissipated by the dissociation of UPy *** introduction of ionic bonds can further improve the mechanical ***,owing to their dynamic nature,both UPy dimers and ionic bonds can re-associate after being dissociated,resulting in excellent self-recovery ability(around 90% recovery efficiency within only 1 h).The excellent self-recovery ability mainly originates from the re-association of UPy dimers based on the high dimerization constant of UPy motifs.

关键词： Multi-bond network Quadruple hydrogen bonding Self-recovery Super-tough hydrogel 2-Ureido-4[1H]-pyrimidone dimer

Discovery of Partial Differential Equations from Highly Noisy and Sparse Data with Physics-Informed Information Criterion

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Research 2024年第1期2023卷 247-259页

作者： hao xu Junsheng Zeng Dongxiao Zhang BIC-ESAT EREand SKLTCSCollege of EngineeringPeking UniversityBeijing 100871P.R.China Institute of Applied Physics and Computational Mathematics Beijing 100088P.R.China Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200ZhejiangP.R.China National Center for Applied Mathematics Shenzhen(NCAMS) Southern University of Science and TechnologyShenzhen 518055GuangdongP.R.China Department of Mathematics and Theories Peng Cheng LaboratoryShenzhen 518000GuangdongP.R.China

Data-driven discovery of partial differential equations(PDEs)has recently made tremendous progress,and many canonical PDEs have been discovered successfully for proof of ***,determining the most proper PDE without prior references remains challenging in terms of practical *** this work,a physics-informed information criterion(PIC)is proposed to measure the parsimony and precision of the discovered PDE *** proposed PIC achieves satisfactory robustness to highly noisy and sparse data on 7 canonical PDEs from different physical scenes,which confirms its ability to handle difficult *** PIC is also employed to discover unrevealed macroscale governing equations from microscopic simulation data in an actual physical *** results show that the discovered macroscale PDE is precise and parsimonious and satisfies underlying symmetries,which facilitates understanding and simulation of the physical *** proposition of the PIC enables practical applications of PDE discovery in discovering unrevealed governing equations in broader physical scenes.

关键词： process canonical proof

Future forestation in China should aim to align the temporal service window of the forest carbon sink with the“carbon neutrality”strategy

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Science China Earth Sciences 2023年第12期66卷 2971-2976页

作者： hao xu Chao YUE Shilong PIAO College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China

*** Carbon sequestration in forest ecosystems worldwide dominates the current global terrestrial carbon sink,offsetting approximately 26% of global anthropogenic carbon emissions annually(Pan et al.,2011).

关键词： service annually forest

Defensive Resource Allocation Method for Improving Survivability of Communication and Information System in CPPS Against Cyber-attacks

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Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 750-759页

作者： Yingjun Wu hao xu Ming Ni College of Energy and Electrical Engineering Hohai UniversityNanjingChina College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjingChina College of Automation and College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjingChina NARI Group Corporation(State Grid Electric Power Research Institute) NanjingChina

With the widespread use of communication and information technology,power system has been evolving into cyber-physical power system(CPPS)and becoming more vulnerable to ***,it is necessary to enhance the ability of the communication and information system in CPPS to defend against *** paper proposes a method to enhance the survivability of the communication and information system in ***,the communication and information system for critical business of power system is decomposed into certain types of atomic services,and then the survivability evaluation indexes and their corresponding calculation method for the communication and information system are ***,considering the efficacy and cost defensive resources,a defensive resource allocation model is proposed to maximize the survivability of communication and information system in ***,a modified genetic algorithm is adopted to solve the proposed ***,the simulation results of CPPS for an IEEE 30-node system verify the proposed method.

关键词： Cyber-physical power system(CPPS) cyber-attacks survivability evaluation communication and information system defensive resource