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Effects of Nb on microstructure and wear resistance of Fe-cr-c-B surfacing alloy

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Journal of Iron and Steel Research International 2018年第2期25卷 243-251页

作者： Jian gou Zheng-jun Liu Hua Jia Department of Material Science and Engineering ShenyangUniversity of Technology Shenyang 110870 LiaoningChina

The influence of Nb on the microstructure and wear resistance of the surfacing layer was investigated by using the Fe-based flux-cored wire in the Fe-cr-c-B system. The microstructure, microhardness and wear resistance properties of the samples were investigated by X-ray diffraction, scanning electron microscopy, microhardness testing and abrasive wear testing, respectively. The results indicate that microstructures of the alloy are composed of martensite, retained austenite, M23（c,B）6 and Nbc. Boride M23（c,B）6 is distributed along the grain boundaries, while Nbc in shape-regular quadrilateral is distributed in martensite. The microhardness is distributed from the substrate to the surfacing layer gradiently. Nbc significantly improved the wear resistance of surfacing layer.

关键词： Flux-cored wire Surfacing layer Microhardness Microstructure Wear resistance

Synthesis,crystal Structure and Photoluminescence of a One-dimensional Zinc(Ⅱ)coordination Polymer with Substituted Terpyridine

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chinese Journal of Structural chemistry 2010年第7期29卷 1098-1102页

作者： gou Lei LI Dong-Lin School of Materials Science and Engineering Chang'an University Xi'an Shaanxi 710061 China college of chemistry and Materials Science Northwest University Xi'an Shaanxi 710069 China

The title compound, [Zn（4-pytpy）（NO3）2] （4-pytpy = 4′-（4-pyridyl）-2,2′：6′,2＂- terpyridine） 1, has been synthesized by the solvothermal reaction of Zn（NO3）2·6H2O with 4-pytpy in cH3OH solution. It crystallizes in the triclinic system, space group P1 with a = 8.358（6）, b = 11.121（8）, c = 11.374（8）A, α = 74.226（11）, β = 74.532（11）, γ = 83.085（12）°, Mr= 499.74, V= 979.3（12） A3, Z = 2, Dc = 1.695 g/cm3, F（000） = 508,μ = 1.309 mm^-1, the final R = 0.0547 and wR = 0.1588. X-ray crystal structure analysis revealed that the Znn is hexa-eoordinated by two oxygen atoms from two nitrate groups and four nitrogen atoms, three of which are from the tridentate domain of one 4-pytpy and the other from the monodentate domain of another 4-pytpy. 4-pytpy as a bridging ligand connects ZnⅡ into a one-dimensional coordination polymer.

关键词： zinc(Ⅱ) complex crystal structure terpyridine,solvothermal reaction luminescentproperty

Linear dichroism and polarization controllable persistent spin helix in two-dimensional ferroelectric ZrOI_(2) monolayer

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Nano Research 2022年第7期15卷 6779-6789页

作者： Niuzhuang Yang gaoyang gou Xiaoli Lu Yue Hao School of Microelectronics State Key Discipline Laboratory of Wide Bandgap Semiconductor TechnologyXidian UniversityXi’an 710071China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an 710049China collaborative Innovation center of Quantum Information of Shaanxi Province Xidian UniversityXi’an 710071China

Two-dimensional ferroelectric(2D-FE)materials that characterize the spontaneous ferroelectricity down to monolayer limit and rich ferroic properties arising from FE orderings,have been extensively explored as low-dimensional sensor,electric and memory *** current work,group-IV transition metal oxide dihalide MOX_(2)(M=Zr and Hf,X=cl,Br and I)monolayers have been identified as a new group of 2D-FE *** the comprehensive first-principles calculations combined with finite temperature Monte carlo(Mc)and ab initio molecular dynamics(MD)simulations,we investigate the temperature stability of FE polarization and further uncover the unique properties associated with spontaneous ferroelectricity of MOX_(2) *** particular,ZrOI_(2) monolayer,a promising 2D-FE material with room temperature stable ferroelectricity,semiconducting electronic structure and optoelectronic response under visible light,offers an ideal material platform to investigate the coupling of intrinsic anisotropy,optical absorption selectivity and spin degree of freedom with 2D ***,significant optical absorption anisotropy and giant linear dichroism effect are predicted for a 2D optical polarizer device based on ZrOI_(2) monolayer,where the adsorption of incident monochromatic linearly polarized light(hv=3.23 eV)along two planar directions with a nearly 100%optical selectivity can be ***,the spin–orbit coupling(SOc)induced spin splitting of valence band edges and out-of-plane textured spin configuration occur in ZrOI_(2) *** the meanwhile,the unidirectional spin–orbit field protected by c2v wave-vector point group can further create the persistent spin helix(PSH)state,leading to the extraordinarily long spin carrier *** importantly,the nonvolatile control of PSH state via the electric field induced polarization reversal has also been demonstrated for FE-ZrOI_(2) monolayer,which manifests as a great advantage for applications of

关键词： two-dimensional ferroelectricity first-principles calculations optical absorption anisotropy spin-textured ferroelectrics allelectric spintronics

geological emission of methane from the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, china

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Journal of Environmental Sciences 2008年第9期20卷 1055-1062页

作者： Tang Junhong Bao Zhengyu Xiang Wu gou Qinghong china Univ geosci Minist Educ Key Lab Biogeol & Environm Geol Wuhan 430074 Peoples R China Hangzhou Dianzi Univ Dept Environm Engn & Sci Hangzhou 310018 Peoples R China Sun Yat Sen Univ Dept Earth Sci Guangzhou 510275 Guangdong Peoples R China

A static flux chamber method was applied to study natural emissions of methane into the atmosphere in the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, china. Using an online method, which couples a gas chromatography/high-temperature conversion/isotope ratio mass spectrometry (gc/c/MS) together, the 13c/12c ratios of methane in the flux chambers were measured. The results demonstrated that methane gases were liable to migrate from deep oil/gas reservoir to the surface through microseepage and p...

关键词： the Yakela condensed oil/gas field methane emission stable carbon isotopes flux chamber

Qixue Shuangbu decoction and acupuncture combined with Western medicine in acute severe stroke patients

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World Journal of clinical cases 2023年第3期11卷 556-565页

作者： Li-Kun gou chun Li Department of critical care Medicine Lanzhou Second People’s HospitalLanzhou 730046Gansu ProvinceChina

BAcKgROUND Stroke is a common and frequently occurring disease of the nervous system and one of the three major diseases leading to human *** incidence and mortality of stroke in china increase with ***,70%of patients with stroke have serious disability,which results in heavy burden to their families and the *** To analyze the effects of Qixue Shuangbu decoction and acupuncture combined with Western medicine on immune indexes and digestive tract function in patients with acute severe *** A total of 68 patients with acute severe stroke admitted to Lanzhou Second People’s Hospital between March 2018 and September 2021 were selected and divided into the control and observation groups according to a random number table *** control group was administered routine Western medicine treatment,such as dehydration,lowering intracranial pressure,anticoagulation,improving cerebral blood circulation and cerebral nerve protection according to the“guidelines for the Diagnosis and Treatment of Acute Ischemic Stroke in china.”The observation group was administered Qixue Shuangbu decoction via nasal feeding tube on the basis of the routine Western medicine treatment with simultaneous *** two groups were *** The acute physiology and chronic health evaluation II,organ dysfunction syndrome score,National Institutes of Health Stroke Scale,and traditional chinese medicine syndrome scores of the two groups were significantly decreased compared with those measured before treatment,and the complements c3 and c4,and immunoglobulins(Ig)M and g were significantly increased compared with those observed before treatment(Pcores of the observation group were lower than those of the control group,and the complement and Ig levels were higher than those of the control group(Pctic acid(D-LA),and calcitonin gene-related peptide(cgRP)in the two groups were significantly

关键词： Qixue Shuangbu Decoction Acupuncture Western medicine Acute severe stroke Intestinal flora Degree of inflammation Immune function

Reliable Data collection Model and Transmission Framework in Large-Scale Wireless Medical Sensor Networks

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computer Modeling in Engineering & Sciences 2024年第7期140卷 1077-1102页

作者： Haosong gou gaoyi Zhang RenêRipardo calixto Senthil Kumar Jagatheesaperumal Victor Hugo c.de Albuquerque china Mobile group Sichuan co. Ltd.Chengdu640041China Department of Teleinformatics Engineering Federal University of CearáFortaleza60455-970Brazil Department of Electronics&communication Engineering Mepco Schlenk Engineering CollegeSivakasi626005India

Large-scale wireless sensor networks(WSNs)play a critical role in monitoring dangerous scenarios and responding to medical ***,the inherent instability and error-prone nature of wireless links present significant challenges,necessitating efficient data collection and reliable transmission *** paper addresses the limitations of existing data transmission and recovery protocols by proposing a systematic end-to-end design tailored for medical event-driven cluster-based large-scale *** primary goal is to enhance the reliability of data collection and transmission services,ensuring a comprehensive and practical *** approach focuses on refining the hop-count-based routing scheme to achieve fairness in forwarding ***,it emphasizes reliable data collection within clusters and establishes robust data transmission over multiple *** systematic improvements are designed to optimize the overall performance of the WSN in real-world *** results of the proposed protocol validate its exceptional performance compared to other prominent data transmission *** evaluation spans varying sensor densities,wireless channel conditions,and packet transmission rates,showcasing the protocol’s superiority in ensuring reliable and efficient data *** systematic end-to-end design successfully addresses the challenges posed by the instability of wireless links in *** prioritizing fairness,reliability,and efficiency,the proposed protocol demonstrates its efficacy in enhancing data collection and transmission services,thereby offering a valuable contribution to the field of medical event-drivenWSNs.

关键词： Wireless sensor networks reliable data transmission medical emergencies cluster data collection routing scheme

ground states, solitons and spin textures in spin-1 Bose-Einstein condensates

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Frontiers of physics 2013年第3期8卷 302-318页

作者： Shu-Wei Song Lin Wen chao-Fei Liu S.-c. gou Wu-Ming Liu Beijing National Laboratory for condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Science Jiangxi University of Science and Technology Ganzhou 341000 China Department of Physics National Changhua University of Education Changhua 50058 Taiwan China

We present an overview of our recent theoretical studies on the quantum phenomena of the spin-1 Bose Einstein condensates, including the phase diagram, soliton solutions and the formation of the topological spin textures. A brief exploration of the effects of spin-orbit coupling on the ground-state properties is given. We put forward proposals by using the transmission spectra of an optical cavity to probe the quantum ground states： the ferromagnetic and polar phases. Quasi-one-dimension solitons and ring dark solitons are studied. It is predicted that characteristics of the magnetic solitons in optical lattice can be tuned by controlling the long-range light-induced and static magnetic dipole- dipole interactions; solutions of single-component magnetic and single-, two-, three-components polar solitons are found; ring dark solitons in spin-1 condensates are predicted to live longer lifetimes than that in their scalar counterparts. In the formation of spin textures, we have considered the theoretical model of a rapidly quenched and fast rotating trapped spin-1 Bose Einstein condensate, whose dynamics can be studied by solving the stochastic projected gross-Pitaevskii equations. Spontaneous generation of nontrivial topological defects, such as the hexagonal lattice skyrmions and square lattice of half-quantized vortices was predicted. In particular, crystallization of merons （half skyrmions） can be generated in the presence of spin-orbit coupling.

关键词： Bose-Einstein condensate spinor vortex lattice soliton spin orbit coupling

Diversity of soil bacteria and fungi communities in artificial forests of the sandy-hilly region of Northwest china

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Journal of Arid Land 2023年第1期15卷 109-126页

作者： gou Qianqian MA gailing QU Jianjun WANg guohua college of geographical Sciences Shanxi Normal UniversityTaiyuan 030000China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Laboratory of Watershed Hydrology and Ecology Linze Inland River Basin Comprehensive Research StationChinese Ecosystem Research NetworkNorthwest Institute of Ecology and Environmental ResourcesChinese Academy of SciencesLanzhou 730000China

Soil erosion is a serious issue in the sandy-hilly region of Shanxi Province,Northwest *** has been gradual improvement due to vegetation restoration,but soil microbial community characteristics in different vegetation plantation types have not been widely *** address this,we analyzed soil bacterial and fungal community structures,diversity,and microbial and soil environmental factors in caragana korshinskii Kom.,Populus tomentosa carr.,Populus simonii carr.,Salix matsudana Koidz,and Pinus tabulaeformis *** were no significant differences in the dominant bacterial community compositions among the five forest *** alpha diversity of the bacteria and fungi communities showed that AcE(abundance-based coverage estimator),chao1,and Shannon indices in *** forest were significantly higher than those in the other four forest types(Pganic matter,total nitrogen,and urease had a greater impact on bacterial community composition,while total nitrogen,β-glucosidase,and urease had a greater impact on fungal community *** relative abundance of beneficial and pathogenic microorganisms was similar across all forest *** on microbial community composition,diversity,and soil fertility,we ranked the plantations from most to least suitable as follows:***,***,***,***,and ***.

关键词： microbial community composition artificial forest bacteria fungi diversity sandy-hilly region

Novel fusiform core-shell-MOF derived in tact metal@carb on composite:An efficient cathode catalyst for aqueous and solid-state Zn-air batteries

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Journal of Energy chemistry 2022年第1期31卷 385-394,I0011页

作者： Di Zhou Hongquan Fu Jilan Long Kui Shen Xinglong gou chemical Synthesis and Pollution control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637000SichuanChina Key Laboratory of Fuel cell Technology of guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina

Owing to the varied mechanisms of ORR/OER,exploiting cost-effective bifunctional catalysts with robust ORR/OER activities and excellent performances in Zn-air batteries is still a *** this work,the co/coO@NSc bifunctional catalyst is obtained by using Zn-MOF@co-MOF as *** co/coO@NSc composite has interconnected porous architecture with in tact metal@carb on structure,exhibiting superior electrocatalytic activities toward ORR and OER that can be comparable with the Pt/c and RuO_(2) catalysts,*** co/coO@NSc-based aqueous Zn-air battery achieves a high specific capacity(759.7 mAh/g)and energy density(990.5 Wh/kg),and ultra-long rechargeable property(more than 400 h/1200 cycles).The co/coO@NSc-based solid-state Zn-air battery also delivers an excellent performance with a long cycle life(more than 143 h/858 cycles).Most importantly,the newly synthesized and recharged co/coO@NSc-based solid-state Zn-air battery can be used to light up a 2 V LED lamp for more than 28 h,demonstrating the superior practicability as rechargeable power source.

关键词： core-shell structure Metal organic framework Aqueous Zn-air battery Solid-state Zn-air battery Ultra long cycle life