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Journal of Modern Power Systems and clean energy 2024年第3期12卷 840-851页

作者： Wei Xu Yufeng guo Tianhui Meng Yingwei Wang Jilai Yu the School of Electrical engineering and Automation Harbin Institute of TechnologyHarbin 150001China

To improve the economic effic.ency of urban integrated energy systems(UIESs)and mitigate day-ahead dispatch uncertainty,this paper presents an interconnected UIES and transmission system(TS)model based on distributed robust ***,interconnections are established between a TS and multiple UIESs,as well as among different UIESs,each incorporating multiple energy *** Bregman alternating direction method with multipliers(BADMM)is then applied to multi-block problems,ensuring the privacy of each energy system operator(ESO).Second,robust optimization based on wind probability distribution information is implemented for each ESO to address dispatch *** column and constraint generation(c&cG)algorithm is then employed to solve the robust ***,to tackle the convergence and practicability issues overlooked in the existing studies,an external c&cG with an internal BADMM and corresponding acceleration strategy is ***,numerical results demonstrate that the adoption of the proposed model and method for absorbing wind power and managing its uncertainty results in economic benefits.

关键词： Distributed robust optimization distributionally robust dispatch urban integrated energy system transmission system external column and constraint generation(c&cG) internal Bregman alternating direction method with multipliers(BADMM)

Development of a novel Eu^(3+)-doped tantalate red-emitting phosphor for w-LEDs application

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Journal of Rare Earths 2024年第8期42卷 1479-1488,I0003页

作者： Fan Zeng Jingjing Ru Bing Zhao Feiyun guo Jianzhong c.en college of chemistry and Materials Fujian Province University Key Laboratory of Green Energy and Environment CatalysisNingde Normal University.Ningde352100China School of environment and Resources School of Carbon Neutral and Modern IndustryFujian Normal UniversityFuzhou350007China college of Information and Mechanical&Electrical engineering Ningde Normal UniversityNingde352100China college of chemistry Fuzhou UniversityFuzhou350108China

Two novel phosphors LiBa_(4(1-x))Eu_(4x)Ta_(3)O_(12)(H-LBTO:xEu^(3+)) and Li_(0.25)Ba_(1-x)Eu_(x)Ta_(0.75)O_(3)(c-LBTO:xEu^(3+))were prepared successfully by a molten salt *** transformation between these two structures was realized by changing the sintering temperature or changing the Eu^(3+) ions concentration,which was also demonstrated by the X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflectance spectra(DRS),and photoluminescence excitation(PLE) analyses,Both the sintering temperature and the Eu^(3+)ions doping concentration have significant impact on the formation of the crystal *** these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under nearUV light of 395 nm excitation,corresponding to Eu^(3+)ions typical transitions of ^(5)D_(0)→^(7)F_(1) and ^(5)D_(0)→^(7)F_(2).The optimum concentration of Eu^(3+) ions is 9 mol% for c-LBTO:xEu^(3+) samples and the quenching interaction type is the nearest-neighbor ion *** thermal stability of the c-LBTO:0.09Eu^(3+)sample was investigated in detail and the device application further suggests that c-LBTO:0.09Eu^(3+) can be used as a red phosphor for near-UV excited w-LEDs in lighting.

关键词： Phosphor Tantalate LED device Rare earths

Fault detection and diagnosis of electric bus air conditioning systems incorporating domain knowledge and probabilistic artificial intelligence

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energy and AI 2024年第2期16卷 316-330页

作者： Fangzhou guo Zhijie c.en Fu Xiao Department of Building environment and energy engineering Hong Kong Polytechnic UniversityHong Kong Lawrence Berkeley National Laboratory BerkeleyCAUSA Research Institute for Smart energy Hong Kong Polytechnic UniversityHong Kong

The air conditioning systems in electric city buses usually operate in rapidly changing ambient conditions and are more likely to suffer from mechanical faults. Although many fault detection and diagnosis (FDD) methods have been developed for building air conditioning systems, they are difficult to be applied to bus air conditioners since its operation is highly dynamic and fault-free data are usually unavailable. Therefore, this paper proposes an FDD method for electric bus air conditioners to tackle the above issues. First, the method identifies faults in an unsupervised manner by comparing selected features among a group of peer systems. Then, considering the features are influenced by the operating conditions, Gaussian process regression (GPR) models are established to find the relationships between each feature and its influential parameters. The probabilistic nature of the GPR is used to differentiate predictions with large uncertainty, which are then excluded from FDD. In this way, robustness of the method is evidently improved. Finally, fault indexes are defined to detect and diagnose mechanical faults. We applied the method to a group of air conditioners in a city bus fleet. Results showed that it can effectively identify refrigerant undercharge and indoor and outdoor fan problems with low false positive/genitive rates. Also, the method is highly robust and not sensitive to the faulty systems in the bus fleet.

关键词： Fault detection and diagnosis Predictive maintenance Air conditioner Electric vehicle Data-driven model Gaussian process

Triple the steady-state reaction rate by decorating the In_(2)O_(3)surface with SiO_(x)for cO_(2)hydrogenation

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Journal of energy chemistry 2024年第8期95卷 96-105,I0003页

作者： Hao Wang chun Yang Xiaoyan Yu Mingrui Wang Runze Yang Xiaowa Nie Ben Hang Yin Alex c.K.Yip chunshan Song Guanghui Zhang Xinwen guo State Key Laboratory of Fine chemicals Frontier Science Center for Smart MaterialsPSU-DUT Joint Center for Energy ResearchSchool of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina Department of chemistry the Chinese University of Hong KongHong Kong 999077China Paihau-Robinson Research Institute the MacDiarmid Institute for Advanced Materials and NanotechnologyVictoria University of WellingtonWellington 6012New Zealand Department of chemical and Process engineering The University of CanterburyChristchurch 8041New Zealand

Indium oxide(In_(2)O_(3)),as a promising candidate for cO_(2)hydrogenation to c_(1) products,often suffers from sintering and activity decline,closely related to the undesirable structural evolution under reaction *** on the comprehension of the dynamic evolution,this study presents an effic.ent strategy to alleviate the agglomeration of In_(2)O_(3)nanoparticles by the surface decoration with highly dispersed silica species(SiO_(x)).Various structural characterizations combined with density functional theory calculations demonstrated that the sintering resulted from the over-reduction,while the enhanced stability originated from the anchoring effect of highly stable In-OSi bonds,which hinders the substantial formation of metallic In(In^(0))and the subsequent agglomeration.0.6Si/In_(2)O_(3)exhibited cO_(2)conversion rate of10.0 mmol g^(-1)h^(-1)at steady state vs.3.5 mmol g^(-1)h^(-1)on In_(2)O_(3)in cO_(2)*** steady-state activity was also achieved on Pd-modified *** to the traditional Pd/In_(2)O_(3)catalyst,the methanol production rate of Pd catalyst supported on 0.6Si/In_(2)O_(3)was enhanced by 23%,showing the potential of In_(2)O_(3)modified by SiO_(x)in serving as a platform *** work provides a promising method to design new In_(2)O_(3)-based catalysts with improved activity and stability in cO_(2)hydrogenation.

关键词： cO_(2)hydrogenation In_(2)O_(3)sintering Dynamic structural evolution Surface SiO_(x)modification DFT simulations

enhanced electrical and mechanical properties of Bi_(2)Te_(3)-based thermoelectric thick films enabled by a practical dynamic regulation strategy

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Journal of Materiomics 2024年第2期10卷 480-489页

作者： Jie Zhou Wei Zhu Qingqing Zhang Guangyu Han YuTong Liu Zhanpeng guo Siming guo Yue Huang Yuan Deng School of Materials Sc.ence and engineering Beihang UniversityBeijing 100191China Research Institute for Frontier Sc.ence Beihang UniversityBeijing 100191China Key Laboratory of Intelligent Sensing Materials and chip Integration Technology of Zhejiang Province Hangzhou Innovation Institute of Beihang UniversityHangzhou310051China

The application of high-density and high-performance micro thermoelectric devices is still in its infancy,mainly restricted by the low performance of Bi_(2)Te_(3)-based thick film as well as the limited device *** this study,we proposed a dynamic regulation strategy to simultaneously strengthen the thermoelectric and mechanical properties for n-type Bi_(2)Te_(3)-based thick *** effects of growth temperature and time on thermoelectric properties have been firstly *** the thermoelectric properties exhibit consistent degradation with increasing thickness at static growth temperature,an effective rising temperature method is introduced to dynamically regulate the nucleation rate and growing diffusion ***,the grain refinement with compact texture structure leads to a relatively large carrier mobility(77.1 cm^(2)·V^(-1)·s^(-1))and appropriate concentration(5.25×10^(19)cm^(-3))as well as further 12%improvement of power factor with an average value up to 12.0 mW·cm^(-1)·K^(-2)over a wide temperature ranging from 313 K to 453 ***,significant enhancement of mechanical property is also achieved with high elastic modules(56.03 GPa),hardness(0.63 GPa)and large energy dissipation capacity to prevent *** study provides a practical solution with dynamic temperature control to fabricate high-performance Bi_(2)Te_(3) thick films with enhanced mechanical property and pro-cessing feasibility for micro thermoelectric devices.

关键词： Bi_(2)Te_(3)material Thick film Magnetron sputter Dynamic temperature Thermoelectric property Mechanical property

A new 4-Ti-added polyoxometalate

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Tungsten 2024年第2期6卷 465-471页

作者： Hai-Lou Li c.en Lian guo-Yu Yang MOE Key Laboratory of cluster Sc.ence School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 102488China

A new inorganic–organic hybrid 4-Ti-added polyoxometalate:[H_(2)N(cH_(3))_(2)]_(2)Na_(3)H_(5)[{Ti(c_(2)O_(4))(H_(2)O)}_(2){Ti(c_(2)O_(4))}_(2)(B-β-SbW_(9)O_(33))_(2)]·22H_(2)O(1)has been successfully made and further characterized by infrared spectroscopy,thermogravimetric analysis,powder X-ray diff raction and single-crystal X-ray diff *** polyoxoanion of 1 exhibits a Krebs-type structure that is constructed from two[B-β-SbW_(9)O_(33)]^(9)−fragments fused together by a belt of four additional Ti atoms decorated by oxalate ***,1 as a heterogeneous catalyst exhibits high activity for Knoevenagel condensation under mild reaction conditions.

关键词： Polyoxometalate Ti-added POM Krebs-type structure Knoevenagel condensation

“co-coordination force”assisted rigid-flexible coupling crystalline polymer for high-performance aqueous zinc-organic batteries

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chinese chemical Letters 2024年第9期35卷 501-506页

作者： Jun guo Zhenbang Zhuang Wanqiang Liu Gang Huang School of Materials Sc.ence and engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Automobile Materials Ministry of EducationDepartment of Materials Science and EngineeringJilin UniversityChangchun 130022China

Organic electrode materials(OEMs)have attracted substantial attention for aqueous zinc-ion batteries(AZIBs)due to their advantages in relieving resource and environmental ***,the potential of OEMs is plagued by their low achievable capacity and high ***,we have proposed a new concept of“co-coordination force”and designed a rigid-flexible coupling crystalline polymer that can overcome the abovementioned *** obtained crystalline polymer(BQSPNs)with multiredox centres makes the BQSPNs exist intermolecular hydrogen bonds(HB)among-c=O,-c=N,and-NH and consequently exhibits transverse two-dimensional arrays and longitudinalπ-πstacking ***,in-situ FTIR,Raman,variable temperature FTIR spectra,and 2D nuclear overhauser effect spectroscopy(NOESY)well capture the existence and evolution process of HB during the electrochemistry reaction process of BQSPNs,uncovering the effect of HB in stabilizing the structure and promoting the reaction *** a result,the BQSPNs with rationally designed“co-coordination force”deliver a high capacity of 459.6 m Ah/g and a stable cycling lifetime for more than 100,000 cycles at 10 A/g in *** results disclose the HB effect and provide a brand-new strategy for high-performance OEMs design.

关键词： co-coordination force crystalline polymer Hydrogen bonds Organic electrode materials Aqueous zinc-ion batteries

A highly sensitive fluorescent HclO probe for discrimination between cancerous and normal cells/tissues

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chinese chemical Letters 2024年第6期35卷 417-420页

作者： Linfang Wang Jing Liu Minghao Ren Wei guo Department of chemistry Changzhi UniversityChangzhi 046011China School of chemistry and chemical engineering Shanxi UniversityTaiyuan 030006China

Elevated level of hypochlorous acid(HclO)is closely associated with cancer *** HclO level in cancer cells would provide important evidence in either early-stage cancer diagnostics or monitoring of its treatment *** this work,a new pyronine-based fluorescent probe for rapid and sensitive detection of HclO was developed by condensing meso-formyl pyronine(PycHO)with 2-hydrazinopyridine to form meso-pyridylhydrazone-functionalized pyronine PyHP,PyHP is nonfluorescent due to the excited-state c=N isomerization nonradiative decay,whereas the HclO-triggered formation of meso-triazolopyridyl pyronine PyTP abolishes the c=N isomerization and thus greatly enhances the *** the probe,the cancer cells/tumor were distinguished with high-contrast from normal ones by laser confocal fluorescence imaging,and the tumor-to-normal(T/N)ratios obtained exceed the clinically acceptable threshold of ***,its capability of in vivo imaging tumor was also *** results indicate the potential of PyHP as an effective tool in the early clinical diagnosis of cancers.

关键词： Meso-pyridylhydrazone-functionalized pyronine Meso-substituents Tumor-to-normal(T/N)ratios Fluorescent probes Hypochlorous acid

Impacts of inter-satellite links on the EcOM model performance for BDS-3 MEO satellites

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Satellite Navigation 2024年第1期5卷 140-154页

作者： chao Yang Jing guo Xiaolong Xu Longyu Wang Qile Zhao GNSS Research center Wuhan UniversityNo.129 Luoyu RoadWuhan430079China

Inter-satellite link(ISL)plays an essential role in current and future Global Navigation Satellite System(GNSS).In this study,we investigate the impact of ISL observations on precise orbit determination for BeiDou-3 Navigation Satellite System(BDS-3)Medium Earth Orbit(MEO)satellites based on different Extended cODE Orbit Models(EcOM).Thanks to the better observation geometry of the Ka-band ISL data compared to the L-band data for BDS-3 MEO satellites,the ISL solution substantially reduces Orbit Boundary Discontinuity(OBD)errors,except for c30,which suffers from unstable Ka-band hardware *** the external quality analysis,ISL significantly enhances the reliability of the orbit of MEO satellites manufactured by the china Academy of Space Technology(cAST).The standard deviation(STD)of the satellite laser ranging(SLR)residuals is approximately 2.5 cm,and the root mean square(RMS)is reduced by 10–23%compared to L-band ***,the Sun-elongation angle dependent systematic error in SLR residuals nearly vanishes based on the reduced 5-parameter EcOM(EcOM1)or extended 7-parameter EcOM(EcOM2)with ISL *** is because the ISL reduces the correlation between state parameters and solar radiation pressure(SRP)parameters as well as those among SRP parameters,leading to a more accurate estimation of both orbit and SRP perturbations,particularly those along B *** confirms that the defic.ency of the SRP models for BDS-3 cAST satellites can be compensated by using better observation geometry from ISL *** the other hand,for the satellite manufactured by Shanghai engineering center for Microsatellites(SEcM),the ISL allows for a more accurate estimation of the Bc_(1)parameter in the EcOM1 *** only reduces linear systematic error,possibly because the impact generated by the satellite bus cannot be entirely absorbed by the B-direction parameters.

关键词： BDS-3 MEO Inter-satellite link Solar radiation pressure EcOM

Glacial-interglacial cycles recorded in clay minerals from the eastern Tibetan Plateau over the last 800 ka and their indications

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Sc.ence china Earth Sc.ences 2024年第7期67卷 2162-2177页

作者： Xiaoyan ZHANG chunxia ZHANG Yan ZHAO Bin HU Zhengtang guo Key Laboratory of cenozoic Geology and environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China college of Earth and Planetary Sc.ences University of Chinese Academy of SciencesBeijing 100049China college of Earth Sc.ence and engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

clay mineral proxies have been widely used to reconstruct changes in provenance and the ***,high-altitude clay mineral indications and long-term and orbital variations have not been fully ***,we present an800-ka clay-mineral record from a lacustrine sediment core(ZB13-c2)from the Zoige Basin on the eastern Tibetan Plateau(TP).X-ray diffraction and scanning electron microscopy were used to identify the clay mineral assemblages and their micromorphological characteristics of core *** results revealed that the clay minerals in core ZB13-c2 are mainly illite,with small amounts of chlorite,kaolinite,and smectite(including irregular mixed-layers of illite-smectite(I/S)and chloritesmectite(c/S)).The clay mineral assemblages and proxies exhibit three stages of change,which are mainly controlled by the Zoige watershed range under different climate *** watershed was limited to the southeastern region with altitudes ranging from~3500 to~4200 meters above sea level(m a.s.l.),and glacial-interglacial hydraulic erosion controlled the input of bedrock debris during 800-621 ka *** expanded to higher altitudes(~4200 to~4700 m a.s.l.)due to stronger seasonal freezethaw weathering without significant glacial-interglacial variations under a cooling and drying climate during 621-100 ka ***,it expanded to its highest altitudes of~4700 to~5200 m *** of the watershed after 100 ka BP,and hydraulic erosion increased obviously under a warm climate of the interstadial MIS 3 on the *** watershed underwent two major expansions under different climatic conditions at~621 ka and 100 ka BP,with the wet/dry alternation became strong at~621 ka *** results reveal that long-term temperature changes and the wet/dry alternation at high altitudes controlled the watershed range and degree of the physical erosion,and that the indications of clay minerals should be carefully clarified before they are used as climate indicators,especi

关键词： Quaternary Zoige Basin Lacustrine sediments Paleoenvironment Weathering