检索结果-南通市图书馆

Chemical reactions of oily sludge catalyzed by iron oxide under supercritical water gasification condition

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2022年第6期16卷 886-896页

作者： Houjun Zhang Fang Chen Jipeng Xu jinli Zhang You Han School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin UniversityTianjin 300072China

Supercritical water gasification is a promising technology in dealing with the degradation of hazardous waste,such as oily sludge,accompanied by the production of fuel *** evaluate the mechanism of Fe_(2)O_(3) catalyst and the migration pathways of heteroatoms and to investigate the systems during the process,reactive force field molecular dynamics simulations are *** terms of the catalytic mechanisms of Fe_(2)O_(3),the surface lattice oxygen is consumed by small carbon fragments to produce CO and CO_(2),improving the catalytic performance of the cluster due to more unsaturated coordination Fe sites *** oxygen combines with*H radicals to form water molecules,improving the catalytic ***,the pathway of asphaltene degradation was revealed at an atomic level,as well as ***,the adsorption of hydroxyl radical on the S atom caused breakage of the two C-S bonds in turn,forming·HSO intermediate,so that the organic S element was fixed into the inorganic liquid *** heteroatom O was removed under the effects of supercritical *** metal particles presented in the oily sludge,such as iron in association with Fe_(2)O_(3) catalyst,helped accelerate the degradation of asphaltenes.

关键词： oily sludge SCWG ReaxFF Fe_(2)O_(3) heteroatoms

An Integrated MCI Detection Framework Based on Spectral-temporal Analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2019年第6期16卷 786-799页

作者： Jiao Yin jinli Cao Siuly Siuly Hua Wang Department of Computer Science and Information Technology La Trobe UniversityVictoria 3083Australia School of Software Engineering Chongqing University of Arts and SciencesChongqing 402160China Institute for Sustainable Industries&Liveable Cities Victoria UniversityVictoria 3083Australia

Aiming to differentiate between mild cognitive impairment(MCI) patients and elderly control subjects, this study proposes an integrated framework based on spectral-temporal analysis for the automatic analysis of resting-state electroencephalogram(EEG) recordings. This framework firstly eliminates noise by employing stationary wavelet transformation(SWT). Then, a set of features is extracted through spectral-temporal analysis. Next, a new wrapper algorithm, named three-dimensional(3-D) evaluation algorithm, is proposed to derive an optimal feature subset. Finally, the support vector machine(SVM) algorithm is adopted to identify MCI patients on the optimal feature subset. Decision tree and K-nearest neighbors(KNN) algorithms are also used to test the effectiveness of the selected feature subset. Twenty-two subjects are involved in experiments, of which eleven persons were in an MCI condition and the rest were elderly control subjects. Extensive experiments show that our method is able to classify MCI patients and elderly control subjects automatically and effectively, with the accuracy of 96.94% achieved by the SVM classifier. Decision tree and KNN algorithms also achieved superior results based on the optimal feature subset extracted by the proposed framework. This study is conducive to timely diagnosis and intervention for MCI patients, and therefore to delaying cognitive decline and dementia onset.

关键词： Electroencephalogram(EEG) dementia early detection mild cognitive impairment(MCI) stationary wavelet transformation(SWT) support vector machine(SVM)

Towards high-performance packet processing on commodity multi-cores: current issues and future directions

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2015年第12期58卷 28-43页

作者： TANG Lu YAN jinli SUN ZhiGang LI Tao ZHANG MinXuan School of Computer National University of Defense Technology

The demands of programmability have become more and more exigent as novel network services appear, such as E-commerce, social softwares, and online videos. Commodity multi-core CPUs have been widely applied in network packet processing to get high programmability and reduce the time-to-market. However,there is a great gap between the packet processing performance of commodity multi-core and that of the traditional packet processing hardware, e.g., NP(Network Process). Recently, optimization of the packet processing performance of commodity multi-cores has become a hot topic in industry and academia. In this paper, based on a detailed analysis of the packet processing procedure, firstly we identify two dominating overheads, namely the virtual-to-physical address translation and the packet buffer management. Secondly, we make a comprehensive survey on the current optimization methods. Thirdly, based on the survey, the heterogeneous architecture of the commodity multi-core + FPGA is proposed as a promising way to improve the packet processing ***, a novel Self-Described Buffer(SDB) management technology is introduced to eliminate the overheads of the allocation and deallocation of the packet buffers offloaded to FPGA. Then, an evaluation testbed, named PIOT(Packet I/O Testbed), is designed and implemented to evaluate the packet forwarding performance. I/O capacity of different commodity multi-core CPUs and the performance of optimization methods are assessed and compared based on PIOT. At last, the future work of packet processing optimization on multi-core CPUs is discussed.

关键词： network commodity multi-core packet processing SKB DPDK

Etching‑Induced Surface Reconstruction of NiMoO_(4) for Oxygen Evolution Reaction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第2期15卷 271-282页

作者： jinli Zhu Jinmei Qian Xuebing Peng Baori Xia Daqiang Gao Key Laboratory for Magnetism and Magnetic Materials of MOE Key Laboratory of Special Function Materials and Structure Design of MOELanzhou UniversityLanzhou 730000People’s Republic of China

Rational reconstruction of oxygen evolution reaction(OER)precatalysts and performance index of OER catalysts are crucial but still challenging for universal water ***,we develop a double-cation etching strategy to tailor the electronic structure of NiMoO_(4),where the prepared NiMoO_(4) nanorods etched by H_(2)O_(2) reconstruct their surface with abundant cation deficiencies and lattice *** results reveal that the double cation deficiencies can make the upshift of d-band center for Ni atoms and the active sites with better oxygen adsorption *** a result,the optimized sample(NMO-30M)possesses an overpotential of 260 mV at 10 mA cm−2 and excellent long-term durability of 162 ***,in situ Raman test reveals the rapid formation of high-oxidation-state transition metal hydroxide species,which can further help to improve the catalytic activity of NiMoO_(4) in *** work highlights the influence of surface remodification and shed some light on activating catalysts.

关键词： Etching Surface reconstruction Cation deficiencies OER

Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2017年第8期25卷 1101-1108页

作者： Lei Huang Lin Qi Hongna Wang jinli Zhang Xiaoqiang Jia Department of Biochemical Engineering School of Chemical Engineering and Technology Tianjin University Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University Syn Bio Research Platform Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) School of Chemical Engineering and TechnologyTianjin University

Heat exchangers play an important role in supercritical water coal gasification systems for heating feed and cooling products. However, serious deposition and plugging problems always exist in heat exchangers. CFD modeling was used to simulate the transport characteristics of solid particles in supercdtical water through the shell and tube of heat exchangers to alleviate the problems. In this paper, we discuss seven types of exchangers CA, B, C D, E, F and G）, which vary in inlet nozzle configuration, header height, inlet pipe diameter and tube pass distribution. In the modeling, the possibility of deposition in the header was evaluated by accumulated mass of particles; we used the velocity contour of supercritical water （SCW） to evaluate the uniformity of the velocity dis- tribution among the tube passes. Simulation results indicated that the optimum heat exchanger had structure F, which had a rectangular configuration of tube pass distractions, a bottom inlet, a 200-mm header height and a 10-ram inlet pipe diameter.

关键词： Supercritical water Shell and tube heat exchanger Particle conveying Pneumatic transport CFD simulations CFX

Determination of 6-Mercaptopurine in Rat Blood by Microdialysis Coupled with High Performance Liquid Chromatography on a Functionalized Multi-wall Carbon Nanotubes Modified Electrode

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2005年第2期21卷 141-144页

作者： LINLi QIUPei-hong XIEXia-feng CAOXu-ni jinli-tong DepartmentofChemistry WenzhouMedicalCollegeWenzhou325035P.R.China DepartmentofChemistry EastChinaNormalUniversityShanghai200062P.R..China

A new chemically modified electrode(CME) immobilized on the surface of multi-wall carbon nanotubes functionalized with carboxylic groups was fabricated. The results indicate that the CME exhibits efficiently electrocatalytic oxidation of 6-mercaptopurine(6-MP). The CME can be used as the working electrode in the liquid chromatography for the determination of 6-MP. The peak current of 6-MP is linearly changed with its concentration ranging from 4.0×10 -7 to 1.0×10 -4 mol/L with the calculated detection limit (S/N=3) of 2.0×10 -7 mol/L. Coupled with microdialysis sampling, the method has been successfully applied to assessing the content of 6-MP in rat blood.

关键词： Mercaptopurine Multi-wall carbon nanotube Chemical modified electrode HPLC Microdialysis sampling

AlCl_(3)modified Pd/Al_(2)O_(3)catalyst for enhanced anthraquinone hydrogenation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第12期64卷 271-280页

作者： Qinqin Yuan Jingyue Liang Wei Li jinli Zhang Cuili Guo School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China

Anthraquinone hydrogenation to produce H_(2)O_(2) is an economically interesting reaction with great industrial ***,we report a series of Pd/xAl catalysts with different AlCl_(3) contents by a conventional stepwise impregnation *** optimal Pd/1.0Al catalyst exhibits a higher performance toward anthraquinone hydrogenation with 8.3 g·L^(-1)hydrogenation efficiency,99.5%selectivity and good stability,obviously superior to that of Pd/Al_(2)O_(3) catalyst(5.2 g·L^(-1)and 97.2%).Detailed characterization demonstrates that AlCl_(3) can be grafted on the γ-Al_(2)O_(3) support to obtain a modified support with abundant surface weak acid and Lewis acid,which can adsorb and activate ***,its steric hindrance could isolate and disperse active metals to form more active *** synergies between metal sites and acid sites promotes the anthraquinone ***,the good stability after grafting AlCl_(3) could attribute to the enhanced metal-support interaction inhibiting metal particles agglomeration and leaching.

关键词： AlCl_(3) Pd-based catalyst H_(2)O_(2) Weak acid Hydrogenation

A novel composite(FMC)to serve as a durable 3D-clam-shaped bifunctional cathode catalyst for both primary and rechargeable zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第17期62卷 1216-1226页

作者： Nengneng Xu Xuemei Li Haoran Li Yanan Wei jinli Qiao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials State Environmental Protection Engineering Center for Pollution Treatment and Control inTextile IndustryCollege of Environmental Science and EngineeringDonghua UniversityShanghai 201620China

Novel and highly durable air cathode electrocatalyst with three dimensional （3D）-clam-shaped structure, MnO2 nanotubes-supported Fe2O3 （Fe2O3/MnO2） composited by carbon nanotubes （CNTs）（（Fe2O3/ MnO2）3/4-（CNTs）1/4） is synthesized using a facile hydrothermal process and a following direct heat- treatment in the air. The morphology and composition of this catalyst are analyzed using scanning elec- tronic microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and energy dispersive X-ray spectroscopy （EDX）. The morphology characteristics reveal that flower-like Fe2O3 parti- cles are highly dispersed on both MnO2 nanotubes and CNT surfaces, coupling all three components firmly. Electrochemical measurements indicate that the synergy of catalyst exhibit superior bi- functional catalytic activity for both oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） as well as stability than Pt/C and lrO2 catalysts. Using these catalysts for air-cathodes, both primary and rechargeable zinc-air batteries （ZABs） are assembled for performance validation. In a primary ZAB, this 3D-clamed catalyst shows a decent open circuit voltage （OCV, -1.48 V） and a high discharge peak power density （349 mW cm 2）, corresponding to a coulomhic efficiency of 92%. In a rechargeahle ZABs with this bifunctional catalyst, high OCV （〉1.3 V） and small charge-discharge voltage gap （〈1.1 V） are achieved along with high specific capacity （780 mAh g 1 at 30 mA cm-2） and robust cycle-life （1,390 cycles at cycle profile of 20 mA/10 min）.

关键词： Bifunctional composite catalysts ORR and OER Rechargeable ZABs Specific capacity Long durability

N_2O decomposition over K/Na-promoted Mg/Zn–Ce–cobalt mixed oxides catalysts

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2014年第7期26卷 1437-1443页

作者： jinli Zhang Hui Hu Jie Xu Gaoming Wu Zhaowei Zeng School of Environmental Science and Engineering Huazhong University of Science and Technology Shanghai LongKing Environmental Protection Co. Ltd. Wuhan Iron and Steel (Group) Corp.

Three groups of cobalt mixed oxide catalysts（Mg/Zn-Co, Mg/Zn-Ce-C, K/Na-Mg/Zn-Ce-Co）were prepared by sol-gel or impregnation methods. The synergistic effects of transition metal, rare earth metal and alkali metal on cobalt mixed catalysts for nitrous oxide（N2O）decomposing to N2 and O2were investigated. The experimental results revealed that the catalytic activity for N2 O decomposition was promoted as Co2＋was replaced partially by Zn2＋/Mg2＋, moreover, the characterization analysis by XRD and XPS showed that Zn2＋/Mg2＋replaced Co2＋successfully into the spinel structure of Co3O4 and promoted significantly the catalytic activity. Especially, the addition of CeO2 and K2O/Na2O decreased the binding energy and resulted in an increase in the density of the electron cloud around Co and an improvement of the catalytic activity. Of the investigated cobalt mixed catalysts, the best catalytic activity was shown by 2% K-Zn0.5-Ce0.05-Co catalyst.

关键词： N2O Catalytic decomposition CeO2 Alkali metal