检索结果-南通市图书馆

Journal of Environmental Sciences 2025年第2期148卷 529-540页

作者： Haoyuan Liang Xu Wang Hui Wang Zhenping Qu Key Laboratory of industrial Ecology and Environmental engineering School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Monolithic catalysts with excellent O_(3)catalytic decomposition performance were prepared by in situ loading of Co-doped KMn_(8)O_(16)on the surface of nickel *** triple-layer structure with Co-doped KMn_(8)O_(16)/Ni6MnO_(8)/Ni foam was grown spontaneously on the surface of nickel foam by tuning the molar ratio of KMnO_(4)to Co(NO_(3))_(2)·6H_(2)O ***,the formed Ni6MnO_(8)structure between KMn_(8)O_(16)and nickel foam during in situ synthesis process effectively protected nickel foam from further etching,which significantly enhanced the reaction stability of *** optimum amount of Co doping in KMn_(8)O_(16)was available when the molar ratio of Mn to Co species in the precursor solution was 2:*** the Mn2Co1 catalyst had abundant oxygen vacancies and excellent hydrophobicity,thus creating outstanding O_(3)decomposition *** O_(3)conversion under dry conditions and relative humidity of 65%,90%over a period of 5 hr was 100%,94%and 80%with the space velocity of 28,000 hr^(−1),*** in situ constructed Co-doped KMn_(8)O_(16)/Ni foam catalyst showed the advantages of low price and gradual applicability of the preparation process,which provided an opportunity for the design of monolithic catalyst for O_(3)catalytic decomposition.

关键词： Co-doped cryptomelane-type manganese O3 decomposition High humidity Nickel foam Monolithic catalyst

Integrating Cu+/Cu0 sites on porous nitrogen-doped carbon nanofibers for stable and efficient CO2 electroreduction to multicarbon products

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 453-462页

作者： Yicheng Chao Jiahao Zhang Qinyue Wu Xinfei Fan Xie Quan Yanming Liu Key Laboratory of industrial Ecology and Environmental engineering (MOE) School of Environmental Science and Technology Dalian University of Technology College of Environmental Science and engineering Dalian Maritime University Frontier Science Center for Smart Materials Dalian University of Technology

The Cu+/Cu0sites of copper-based catalysts are crucial for enhancing the production of multicarbon(C2+)products from electrochemical CO2reduction reaction（eCO2RR）.However,the unstable Cu+and insufficient Cu+/Cu0active sites lead to their limited selectivity and stability for C2+***,we embedded copper oxide（CuOx） particles into porous nitrogen-doped carbon nanofibers（CuOx@PCNF）by pyrolysis of the electrospun fiber film containing ZIF-8 and Cu2O *** porous nitrogendoped carbon nanofibers protected and dispersed Cu+species,and its micro porous structure enhanced the interaction between CuOxand reactants during *** obtained CuOx@PCNF created more effective and stable Cu+/Cu0active *** showed a high Faradaic efficiency of 62.5% for C2+products in Hcell,which was 2 times higher than that of bare CuOx（～31.1%）.Furthermore,it achieved a maximum Faradaic efficiency of 80.7% for C2+products in flow *** situ characterization and density functional theory（DFT） calculation confirmed that the N-doped carbon layer protected Cu+from electrochemical reduction and lowered the energy barrier for the dimerization of**** and exposed Cu+/Cu0active sites enhanced the enrichment of*CO and promoted the C-C coupling reaction on the catalyst surface,which facilitated the formation of C2+products.

关键词： Carbon nanofibers Cu+/Cu0 sites C–C coupling Electrocatalytic CO2 reduction Multicarbon products

Empirical comparison of the effects of other party's vehicle type on motorcyclists' injury severity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation engineering(English Edition) 2025年第01期 180-200页

作者： Thanapong Champahom Chamroeun Se Wimon Laphrom Duangdao Watthanaklang Sajjakaj Jomnonkwao Vatanavongs Ratanavaraha Department of Management Faculty of Business AdministrationRajamangala University of Technology Isan School of Transportation engineering Institute of EngineeringSuranaree University of Technology Department of Construction engineering Transport and Logistics Faculty of Industrial TechnologyNakhon Ratchasima Rajabhat University

This research explores the various factors influencing the severity of injuries motorcyclists sustain across different collision scenarios. The study considers the types of vehicles involved, including motorcycle(MC), cars, pickup trucks, vans, and trucks. The study is grounded in an analysis of road crashes in Thailand from 2016 to 2019. Recognizing the unique characteristics inherent in each collision type, the study categorizes crashes into six distinct models for a comprehensive analysis. Each model is constructed using the random parameter logit with unobserved heterogeneity in means. Notably, all models incorporate random parameters, with the exception of the MC vs. truck model. Despite some consistent factors across most models, there are noteworthy variations in parameters when comparing different vehicle types. In the context of single-motorcycle crashes,speed limit violation emerges as a critical factor. For the MC vs. MC model, crashes happening from midnight to early morning are significant. The presence of a passenger(pillion) is a key determinant in the MC vs. car model. Meanwhile, in the MC vs. pickup truck model, crashes occurring under poor light conditions from midnight to early morning are of particular importance. The MC vs. van model notably highlights the involvement of male riders. Lastly, the MC vs. truck model draws attention to crashes happening on weekends. By creating specific crash models for diverse vehicle types, this study enhances our understanding of motorcycle crashes. The findings provide valuable insights to inform the development of policies, the design of safety campaigns, the creation of training programs, and the evaluation of road safety.

关键词：

Upcycling of polyphenylene oxide into 2,6-dimethyl aniline via depolymerization and amination over a Pt/CeO_(2) catalyst

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第2期68卷 520-525页

作者： Shengchao Jia Wenke Zhao Xiaohui Liu Yong Guo Yanqin Wang State Key Laboratory of Green Chemical engineering and industrial Catalysis Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Upcycling of plastic waste into N-containing compound is a novel and attractive strategy for its disposal and will opens up a promising direction for the production of value-added ***,an efficient strategy for the depolymerization-amination of polyphenylene oxide(PPO)into 2,6-dimethyl aniline is developed over a simple Pt/CeO_(2) *** C–O linkages of PPO can be selectively broken,producing 2,6-dimethyl phenol and then hydrogenated and aminated to 2,6-dimethyl cyclohexylamine over the Pt/CeO_(2) ***,2,6-dimethyl aniline was produced with high selectivity through the dehydrogenation of 2,6-dimethyl cyclohexylamine in the same *** can be used as the hydrogen-acceptor in the dehydrogenation step and enhance the selectivity of target *** N-containing compound,2,6-dimethyl aniline,is obtained and separated after HCl ***,the Pt/CeO_(2) catalyst exhibit remarkable stability and can sustainably catalyze the synthesis of 2,6-dimethyl aniline in several cycles.

关键词： PPO depolymerization-amination 2,6-dimethyl aniline Pt/CeO_(2)

Free vibration and transient response of double curved beams connected by intermediate straight beams

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-TALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHATIR T.CUONG-LE School of Mechanical engineering Babol Noshirvani University of Technology Department of Mechanical engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for engineering Application and technology Solutions Ho Chi Minh City Open University

This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. The strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. The curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

关键词： double curved beam finite element method functionally graded porous (FGP) material intermediate straight beam O313 vibration analysis

From Static and Dynamic Perspectives:A Survey on Historical Data Benchmarks of Control Performance Monitoring

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 300-316页

作者： Pengyu Song Jie Wang Chunhui Zhao Biao Huang the State Key Laboratory of industrial Control technology College of Control Science and Engineering Zhejiang University IEEE the Department of Chemical and Materials engineering University of Alberta

In recent decades, control performance monitoring(CPM) has experienced remarkable progress in research and industrial applications. While CPM research has been investigated using various benchmarks, the historical data benchmark(HIS) has garnered the most attention due to its practicality and effectiveness. However, existing CPM reviews usually focus on the theoretical benchmark, and there is a lack of an in-depth review that thoroughly explores HIS-based methods. In this article, a comprehensive overview of HIS-based CPM is provided. First, we provide a novel static-dynamic perspective on data-level manifestations of control performance underlying typical controller capacities including regulation and servo: static and dynamic properties. The static property portrays time-independent variability in system output, and the dynamic property describes temporal behavior driven by closed-loop feedback. Accordingly,existing HIS-based CPM approaches and their intrinsic motivations are classified and analyzed from these two ***, two mainstream solutions for CPM methods are summarized, including static analysis and dynamic analysis,which match data-driven techniques with actual controlling behavior. Furthermore, this paper also points out various opportunities and challenges faced in CPM for modern industry and provides promising directions in the context of artificial intelligence for inspiring future research.

关键词： Control performance monitoring (CPM) data-driven method historical data benchmark (HIS) industrial process performance index static and dynamic analysis

An Evaluation on Physical Characteristics of Konjac Polysaccharides-Based Film Coating and Its Application for Strawberries Preservation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2025年第1期13卷 181-197页

作者： Desy Nurliasari Awaly Ilham Dewantoro Muhammad Adly Rahandi Lubis Roni Kastaman Mohamad Djali Efri Mardawati Devi Maulida Rahmah Siti Nurhasanah Akbar Hanif Dawam Abdullah Lukmanul Hakim Zaini Department of Agricultural industrial technology Faculty of Agro-Industrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Research Center for Biomass and Bioproducts National and Innovation AgencyCibinong1691Indonesia Research Collaboration Center for Biomass and Biorefinery between BRIN and Universitas Padjadjaran Jatinangor45363Indonesia Research Center for Appropriate technology Universitas PadjadjaranJatinangor45363Indonesia Department of Food industrial technology Faculty of Agro-Industrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Institute of Wood technology and Renewable Materials Department of Material Sciences and Process EngineeringUniversity of Natural Resources and Life SciencesVienna(BOKU)Vienna1180Austria

Konjac is an ideal candidate for edible coatings on fruits due to its hydrophilic properties,ﬁlm-forming ability,barrier properties,safety,and ***,the high market demand for strawberries necessitates post-harvest treatment to extend their shelf life and preserve their quality,as strawberries are known for their fragile skin and soft *** fully utilize konjac and develop high-quality coatingﬁlms,native konjacﬂour(NKF)and konjac glucomannan(KGM)were extracted from its corm and used as a coatingﬁlm for strawberries in the present ***,this study aimed to compare the physical properties of theﬁlm coatings between NKF and KGM,and evaluate their effects on strawberries preservation over 7 days of storage.A multistage extrac-tion process was employed to isolate NKF and KGM,after which the glucomannan content was *** yield was 31.81%,exceeding KGM yield of 26.42%,and the glucomannan content obtained of NKF(25.93%)was higher than KGM(21.41%).Nuclear magnetic resonance spectroscopy conﬁrmed that both NKF and KGM con-tain glucomannan in their ***,both NKF and KGM were combined with carboxymethyl cel-lulose(CMC)and glycerol to produce eight thin-layerﬁlms to assess their physical and mechanical *** to the KGM variant,the NKF variant generally exhibited higher moisture content,water vapor trans-mission rate,and tensile ***,NKF was less effective than KGM in extending strawberry storage life,leading to faster color changes and greater weight loss,despite maintaining similar hardness ***,konjac-based coatings were generally effective at maintaining the freshness and quality of strawberries compared to uncoated *** shows promise as an edible coating,improving fresh produce shelf life and appeal,aligning with consumer preferences for natural and sustainable products.

关键词： Amorphophalus oncophyllus coating performances edibleﬁlm strawberry preservation

Cu/TiO_(2)adsorbents modified by air plasma for adsorption-oxidation of H_(2)S

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第2期148卷 476-488页

作者： Yongqi Yan Xinyu Yang Ping Ning Chi Wang Xin Sun Fei Wang Peng Gao Kai Li faculty of Environmental Science and engineering Kunming University of Science and TechnologyKunming 650500China National-Regional engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500China faculty of Chemical engineering Kunming University of Science and TechnologyKunming 650500China City College Kunming University of Science and TechnologyKunming 650500China

In this study,non-thermal plasma(NTP)was employed to modify the Cu/TiO_(2)adsorbent to efficiently purify H_(2)S in low-temperature and micro-oxygen *** effects of Cu loading amounts and atmospheres of NTP treatment on the adsorption-oxidation performance of the adsorbents were *** NTP modification successfully boosted the H_(2)S removal capacity to varying degrees,and the optimized adsorbent treated by air plasma(Cu/TiO_(2)-Air)attained the best H_(2)S breakthrough capacity of 113.29 mg H_(2)S/gadsorbent,which was almost 5 times higher than that of the adsorbent without NTP *** studies demonstrated that the superior performance of Cu/TiO_(2)-Air was attributed to increased mesoporous volume,more exposure of active sites(CuO)and functional groups(amino groups and hydroxyl groups),enhanced Ti-O-Cu interaction,and the favorable ratio of active oxygen ***,the X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)results indicated the main reason for the deactivationwas the consumption of the active components(CuO)and the agglomeration of reaction products(CuS and SO_(4)^(2−))occupying the active sites on the surface and the inner pores of the adsorbents.

关键词： Non-thermal plasma(NTP) Surface modification Simultaneous adsorption-oxidation Cu/TiO_(2)(TiO_(2)loaded with copper) H_(2)S

Lattice-mismatch-induced formation of defect-rich Pd-Cu alloy nanocages for enhanced formic acid oxidation activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第2期68卷 481-491页

作者： Zhaojun Liu Zhengyan Wang Zhaoyu Wang Hao Yuan Yuke Bai Xiaoxiao Wang Zerui Mu Chunxia Wu Kai Liu Zhun Hu Chuanbo Gao Sate Key Laboratory of Multiphase Flow in Power engineering Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Institute of industrial Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China

Crystallographic defects in noble metal nanocrystals are recognized as highly active catalytic sites,significantly enhancing activities in many important *** their importance,synthesizing noble metal nanocrystals with a high density of defects poses a considerable synthetic ***,we present a novel lattice mismatch-induced formation mechanism to create high-density defects in noble metal *** approach takes advantage of lattice mismatch to enable nonepitaxial nucleation and growth of a noble metal on a foreign metal substrate,forming abundant noble metal crystallites with random lattice orientations not dictated by the substrate *** these crystallites grow extensively,they merge,forming numerous grain boundaries and yielding defect-rich noble metal ***-rich alloy nanocrystals can also be synthesized through a subsequent vacancy-diffusion alloying *** take defective PdCu alloy nanocages as an example and demonstrate the effectiveness of crystallographic defects in enhancing catalytic performance of noble metal *** nanocages exhibit superior activity in the electrocatalytic formic acid oxidation reaction,which is 1.6 times greater than their defect-free *** strategy offers a new avenue for creating defect-rich noble metal nanocrystals as highly efficient catalysts for a wide array of catalytic applications.

关键词： noble metal nanocrystals defects non-epitaxial growth electrocatalysis formic acid oxidation reaction

Dynamic stress concentration in an infinitely long cylindrical cavity due to a point spherical source embedded within a fluid-saturated poroelastic formation of infinite extent

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 139-156页

作者： H.HOSSEINI O.BALILASHAKI Department of Mechanical engineering Faculty of EngineeringGolestan University

The effects of a harmonically exciting monopole source on an infinitely long cylindrical cavity embedded entirely within a fluid-saturated poroelastic formation of infinite extent are examined theoretically. It is assumed that the source is located outside the cavity at a specified distance from the borehole axis. The magnitudes of the hoop and radial stresses beside the pore pressures exerted on the interface and inside the porous medium surrounding the borehole are calculated and discussed. Biot's poroelastic modeling along with three types of boundary conditions for the cylindrical interface including the ideal fluid, empty borehole, and rigid inclusion with a hard boundary is employed for the analysis. Utilizing a proper translational addition theorem for expressing the incident spherical wave in terms of cylindrical wave expansions, the proposed boundary conditions at the interface are satisfied. Stresses are formulated by means of wave potential functions in a three-dimensional(3D) manner. The effects of the frequency and the radial distance between the source and borehole on the induced stresses are examined for the first cylindrical modes over frequency spectra. Two permeability conditions for the interface and three types of soils for the porous formation are considered throughout the analysis. To give an overall outline of the study, a numerical example is presented. The results clearly indicate that the distance is a key parameter and has considerable effects on the induced stress values. In addition, the interface permeability condition and soil characteristics play an important role in determining the dynamic response of the borehole. Finally,the obtained results are compared with the relevant analyses existing in the literature for some limit cases, and good agreement is achieved.

关键词： cylindrical cavity O353.4 point source porous medium stress concentration wave-field transformation