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Microstructure and mechanical properties of twin-wire arc sprayed Ni-Al composite coatings on 6061-T6 aluminum alloy sheet

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International Journal of Minerals,Metallurgy and Materials 2014年第5期21卷 469-478页

作者： Ji-xiao Wang jing-shun Liu Lun-yong Zhang Jian-fei sun Zhi-ping Wang School of Materials Science and Engineering Harbin Institute of Technology Harbin Welding Institute China Academy of Machinery Science & Technology School of Materials Science and Engineering Inner Mongolia University of Technology National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering Nanjing University College of science Civil Aviation University of China

We have systematically studied the microstructure and mechanical properties of Ni-5wt%Al and Ni-20wt%Al composite coat- ings fabricated on 6061-T6 aluminum alloy sheet by twin-wire arc spraying under different experimental conditions. The abrasive wear be- havior and interface diffusion behavior of the composite coatings were evaluated by dry/wet rubber wheel abrasive wear tests and heat treat- ment, respectively. Experimental results indicate that the composite coatings exhibit features of adhesive wear. Besides, the Vickers micro- hardness of NiA1 and Ni3AI intermetallic compounds is relatively larger than that of the substrate, which is beneficial for enhancing the wear resistance. With the increase of annealing temperature and time, the interface diffusion area between the Ni-Al coating and the substrate gradually expands with the formation of NiAl3 and Ni2Al3 phases, and is controlled by diffusion of aluminum atoms. The grain growth ex- ponent n of diffusion kinetics of the Ni-Al coating, calculated via a high-temperature diffusion model at 400, 480, and 550℃, is between 0.28 and 0.38. This satisfies the cubic law, which is consistent with the general theoretical relationship of high-temperature diffusion.

关键词： composite coatings intermetallics spraying aluminum alloys mechanical properties diffusion

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Spatial Dependent Spontaneous Emission of an Atom in a Semi-Infinite Waveguide of Rectangular Cross Section

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Communications in Theoretical Physics 2018年第1期69卷 59-67页

作者： Hai-Xi Song xiao-Qi sun jing Lu Lan Zhou Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center of Quantum Effects and Applications Hunan Normal University Changsha 410081 China

We study a quantum electrodynamics(QED) system made of a two-level atom and a semi-infinite rectangular waveguide, which behaves as a perfect mirror in one end. The spatial dependence of the atomic spontaneous emission has been included in the coupling strength relevant to the eigenmodes of the waveguide. The role of retardation is studied for the atomic transition frequency far away from the cutoff frequencies. The atom-mirror distance introduces different phases and retardation times into the dynamics of the atom interacting resonantly with the corresponding transverse modes. It is found that the upper state population decreases from its initial as long as the atom-mirror distance does not vanish, and is lowered and lowered when more and more transverse modes are resonant with the atom. The atomic spontaneous emission can be either suppressed or enhanced by adjusting the atomic location for short retardation *** are partial revivals and collapses due to the photon reabsorbed and re-emitted by the atom for long retardation time.

关键词： quantum optics waveguide spontaneous emission retardation

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Subcutaneous panniculitis-like T-cell lymphoma invading central nervous system in long-term clinical remission with lenalidomide:A case report

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World Journal of Clinical Cases 2021年第8期9卷 1885-1892页

作者： jing sun xiao-Shan Ma Li-Mei Qu Xue-Song Song Department of Anesthesiology The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Neurosurgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Pathology The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

BACKGROUND Subcutaneous panniculitis-like T-cell lymphoma(SPTCL)involvement in the central nervous system(CNS)is particularly *** with CNS involvement has an exceedingly poor prognosis,and no optimum therapeutic method has been *** the best of our knowledge,this is the first reported case of SPTCL invading the CNS achieving long-term remission with lenalidomide maintenance *** SUMMARY A 63-year-old man diagnosed with SPTCL was admitted to the hospital with severe headache for 15 d after four cycles of *** to the treatment,the patient developed CNS *** biopsy was pathologically diagnosed as CNS T-cell lymphoma,and two courses of chemotherapy were performed *** to the intolerance of the side effects of chemotherapeutic drugs,the patient received lenalidomide *** magnetic resonance imaging of the head at the 8 mo follow-up indicated no signs of recurrence,and the vital signs were *** Lenalidomide deserves further investigation as a targeted drug for SPTCL cases involving the CNS.

关键词： Subcutaneous panniculitis-like T-cell lymphoma Central nervous system Tcell lymphoma Lenalidomide Complication Case report

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Facile preparation of covalent organic frameworks@alginate composite beads for enhanced uranium(Ⅵ) adsorption

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Rare Metals 2022年第4期41卷 1323-1331页

作者： Pan Duan Duo-Yu Lin Wei-Ting Yang xiao-jing Huang A-Hui sun Qin-He Pan Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EducationChemical Engineering and TechnologyHainan UniversityHaikou 570228China

Covalent organic frameworks(COFs) have broad application prospects in adsorption and ***,as COFs are generally in powder form,their superior performance at the laboratory scale is difficult to transfer into pilot-or industrial-scale ***,there is a strong and urgent need to structure COFs into monolithic ***,a facile strategy was developed to prepare COFs@alginate composite *** composite beads comprising different COFs including TpPa-1(2,4,6-triformylphloroglucinol(Tp) and p-phenylenediamine(Pa-1)as monomers),TpDb(Tp and 2,5-diaminobenzonitrile(Db)as monomers) and TpTt(Tp and 1,3,5-triazine-2,4,6-triamine(Tt) as monomers) with controlled COF loading and product size have been facilely achieved via this strategy,validating the applicability of this ***,the representative TpDb@alginate composite beads showed good adsorption performance of uranium(VI) in aqueous solution with high adsorption capacity(635 mg·g^(-1)),good interference immunity and *** work offers a practical approach for incorporation of COFs into polymer matrix,which can serve as potential adsorbents for radioactive wastewater treatment.

关键词： Covalent organic frameworks Alginate Composite beads Uranium Adsorption

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Comparison of UV and UV-LED activated sodium percarbonate for the degradation of O-desmethylvenlafaxine

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Journal of Environmental Sciences 2023年第4期126卷 656-667页

作者： jing Deng Anhong Cai xiao Ling Qian sun Tianxin Zhu Qingsong Li Xueyan Li Weizhu Chen College of Civil Engineering Zhejiang University of TechnologyHangzhou 310023China Affilicated Zhejiang Hospital Zhejiang University School of MedicineHangzhou 310013China Water Resources and Environmental Institute Xiamen University of TechnologyXiamen 361005China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Third Institute of Oceanography Ministry of Natural ResourceXiamen 361005China

As an active metabolite of venlafaxine and emerging antidepressant,Odesmethylvenlafaxine(ODVEN) was widely detected in different water bodies,which caused potential harm to human health and environmental *** this study,the comparative work on the ODVEN degradation by UV(254 nm) and UV-LED(275 nm) activated sodium percarbonate(SPC) systems was systematically *** higher removal rate of ODVEN can be achieved under UV-LED direct photolysis(14.99%) than UV direct photolysis(4.57%) due to the higher values of photolysis coefficient at the wavelength *** synergistic effects were observed in the UV/SPC(80.38%) and UV-LED/SPC(53.57%) systems and the former exhibited better performance for the elimination of *** degradation of ODVEN all followed the pseudo-first-order kinetics well in these processes,and the pseudo-first-order rate constant(kobs) increased with increasing SPC *** quenching experiments demonstrated that both ·OH and CO_(3)·-were involved in the degradation of ODVEN and the second-order rate constant of ODVEN with CO_(3)·-(1.58 × 10^(8)(mol/L)-1sec-1) was reported for the first time based on competitive kinetic *** introduction of HA,Cl-,NO_(3)-and HCO_(3)-inhibited the ODVEN degradation to varying degrees in the both *** to quantum chemical calculation,radical addition at the ortho-position of the phenolic hydroxyl group was confirmed to be the main reaction pathways for the oxidation of ODVEN by·*** addition,the oxidation of ODVEN may involve the demethylation,H-abstraction,OH^(-)addition and C-N bond ***,the UV-LED/SPC process was considered to be more cost-effective compared to the UV/SPC process,although the UV/SPC process possessed a higher removal rate of ODVEN.

关键词： Advanced oxidation processes Sodium percarbonate Quantum chemical calculation Degradation pathways Electrical energy per order

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Burden of mental disorders and risk factors in the Western Pacific region from 1990 to 2021

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World Journal of Psychiatry 2025年第1期15卷 93-105页

作者： Ya-Xin Xu xiao-Xuan Niu Wen-Chang Jia jing Wen Xue-Lin Cheng Yan Han Ming-Hui Peng jing Zhou Yao Liu sun-Fang Jiang xiao-Pan Li Department of Health Management Centre Zhongshan HospitalFudan UniversityShanghai 200030China Department of General Practice Zhongshan HospitalFudan UniversityShanghai 200030China Department of Nutrition Zhongshan HospitalFudan UniversityShanghai 200032China School of Public Health Fudan UniversityShanghai 200032China

BACKGROUND The burden of mental disorders(MD)in the Western Pacific Region(WPR)re-mains a critical public health concern,with substantial variations across demogra-phics and *** To analyze the burden of MD in the WPR from 1990 to 2021,along with associated risk factors,to reveal changing trends and emerging *** We used data from the Global Burden of Disease 2021,analyzing prevalence,incidence,and disability-adjusted life years(DALYs)of MD from 1990 to *** methods included age-standardisation and uncertainty analysis to address variations in population structure and data *** Between 1990 and 2021,the prevalence of MD rose from 174.40 million cases[95%uncertainty interval(UI):160.17-189.84]to 234.90 million cases(95%UI:219.04-252.50),with corresponding DALYs increasing from 22.8 million(95%UI:17.22-28.79)to 32.07 million(95%UI:24.50-40.68).During this period,the burden of MD shifted towards older age *** and anxiety disorders were predominant,with females showing higher DALYs for depressive and anxiety disorders,and males more affected by conduct disorders,attention-deficit hyperactivity disorder,and autism spectrum ***,New Zealand,and Malaysia reported the highest burdens,whereas Vietnam,China,and Brunei Darussalam reported the ***,childhood sexual abuse and bullying,and intimate partner violence emerged as significant risk *** This study highlights the significant burden of MD in the WPR,with variations by age,gender,and *** coronavirus disease 2019 pandemic has exacerbated the situation,emphasizing the need for a coordinated response.

关键词： Mental disorders Western pacific region Global Burden of Disease Risk factors Disability-adjusted life years

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Zircon U-Pb geochronologic,geochemical and Sr-Nd-Pb isotope characteristics of the Beidaban granites in the North Qilian Orogenic Belt:Petrogenesis and tectonic implications

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Acta Geochimica 2024年第6期43卷 1087-1104页

作者： Tao Yang Zhi-yuan sun Ming-liang Wang xiao-qiang Zhu jing-yu Zhao The First Institute of Geology and Mineral Exploration Gansu Provincial Bureau of Geology and Mineral ExplorationTianshui 741020China School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China School of Geography and Tourism Anhui Normal UniversityWuhu 241000China

The tectonic evolution and crustal accretion process of the North Qilian Orogenic Belt(NQOB)are still under debate because of a lack of integrated constraints,especially the identifi cation of the tectonic transition from arc to initial *** we present results from zircon U-Pb geochronology,whole-rock geochemistry,and Sr-Nd-Pb isotope geochemistry of the Beidaban granites to provide crucial information for geodynamic evolution of *** U-Pb dating yields an age of 468±10 Ma for the Beidaban granites and most of the Beidaban samples contain amphibole,are potassium-rich,and have A/CNK values ranging from 0.7 to 0.9,illustrating that the Middle Ordovician Beidaban granites are K-rich,metaluminous,calc-alkaline *** geochemical characteristics indicate that the Beidaban granites are transitional I/S-type granitoids that formed in an arc *** isotopic compositions of initial(87 Sr/86 Sr)i values ranging from 0.70545 to 0.71082(0.70842 on average)andεNd(t)values ranging from−10.9 to−6.7(−8.8 on average)with two-stage Nd model ages(T DM2)of 1.74-2.08 Ga suggest that the Beidaban granites originated from Paleoproterozoic crustal *** addition,the initial Pb isotopic compositions(^(206)Pb/^(204)Pb=19.14-20.26;^(207)Pb/^(204)Pb=15.71-15.77;^(208)Pb/^(204)Pb=37.70-38.26)and geochemical features,such as high Th/Ta(17.43-30.12)and Rb/Nb(6.01-15.49)values,suggest that the Beidaban granite magma source involved recycled crustal components with igneous *** on these results in combination with previously published geochronological and geochemical data from other early Paleozoic igneous rocks,we suggest that the timing of the tectonic transition from arc to the initial collision to the fi nal closure of the North Qilian Ocean can be constrained to the Middle-Late Ordovician(ca.468–450 Ma).

关键词： Granitoids Zircon U-Pb dating Sr-Nd-Pb-isotopes Petrogenesis North Qilian Orogenic Belt

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Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry

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Science China Earth Sciences 2016年第11期59卷 2213-2222页

作者： sun Che MA xiao Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China National Laboratory for Marine Science and Technology Qingdao 266071 China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

The vertical thermohaline structure in the western equatorial Pacific is examined with a Gravest Empirical Mode(GEM)diagnosis of in-situ mooring measurements. The poor GEM performance in estimating deep thermohaline variability from satellite altimetry confirms a lack of vertical coherence in the equatorial ocean. Mooring observation reveals layered equatorial water with phase difference up to 6 months between thermocline and sub-thermocline variations. The disjointed layers reflect weak geostrophy and resemble pancake structures in non-rotating stratified turbulence. A coherency theorem is then proved, stating that traditional stationary GEM represents in-phase coherent structure and can not describe vertically out-of-phase variability. The fact that stationary GEM holds both spatial and temporal coherence makes it a unique tool to diagnose vertical coherent structure in geophysical flows. The study also develops a non-stationary GEM projection that captures more than 40% of the thermohaline variance in the equatorial deep water.

关键词： Equatorial Pacific TRITON buoys Satellite altimetry GEM Vertical coherence

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Water mass characteristics in the western North Pacific based on a streamfunction projection

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Science China Earth Sciences 2015年第11期58卷 2067-2077页

作者： MA xiao sun Che Institute of Oceanology Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences

A streamfunction projection method called gravest empirical mode(GEM) is applied to the hydrographic section at 137°E to filter out eddy noises in the western North Pacific and derive quantitative ensemble-average water mass properties in the North Equatorial Current region. The GEM fields capture more than 80% of total property variances in the thermocline layer. The core layer structures of key water masses, including the North Pacific Tropical Water(NPTW) and the North Pacific Intermediate Water(NPIW), are examined with a definition of water mass boundary based on property gradient. It shows that a tongue of maximal root-mean-square(RMS) residual exists in the upper half of NPIW for all water properties. These subsurface RMS tongues appear to be close to sharp property gradients. It is the first time a GEM diagnosis is applied to nutrient data, which reveals a drastic difference of N/P reaction rate ratio above and below the maximal-nutrient core at 1250 m. Additionally, a GEM velocity reconstruction successfully produces the North Equatorial Undercurrent(NEUC), demonstrating the stable thermal-wind nature of this newly-discovered current.

关键词： streamfunction projection gravest empirical mode water masses western North Pacific

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Transjugular intrahepatic portosystemic shunt is effective in patients with chronic portal vein thrombosis and variceal bleeding

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Hepatobiliary & Pancreatic Diseases International 2021年第2期20卷 128-136页

作者： xiao-Yan sun Guang-Chuan Wang jing Wang Guang-Jun Huang Chun-Qing Zhang Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China Department of Infectious Diseases Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China

Background:Studies about treatment of patients with chronic portal vein thrombosis(CPVT)are still limited,especially in different types of *** study aimed to evaluate the effect of transjugular intrahepatic portosystemic shunt(TIPS)in all types of CPVT with variceal ***:Patients with CPVT who received TIPS treatment between January 2011 and June 2019 were divided into four types according to the extent of *** patients had a history of variceal *** characteristics and clinical parameters were collected and *** on procedure success rate,variation in portal vein pressure,rebleeding,hepatic encephalopathy(HE),stent stenosis,and overall mortality were ***:A total of 189 patients were included in this study(39 in type 1,84 in type 2,48 in type 3,18 in type 4).The TIPS procedure success rate was 86.2%.The success rate was significantly different among the four types(89.7%vs.88.1%vs.83.3%vs.77.8%,P=0.001).In the TIPS success group,portal vein pressure was significantly reduced from 27.15±6.59 to 19.74±6.73 mm Hg after the procedure(P<0.001)and the rebleeding rate was significantly lower than that of the fail group(14.7%vs.30.8%,P=0.017).In addition,there were no significant differences in HE rate(30.7%vs.26.9%,P=0.912)or overall mortality(12.9%vs.19.2%,P=0.403)between the TIPS success group and the fail *** the TIPS success group,we found that the occurrence of HE was significantly different(P=0.020)among the four types,while there were no significant differences in rebleeding rate(P=0.669),stent stenosis rate(P=0.056),or overall mortality(P=0.690).Conclusions:TIPS was safe and effective in decreasing portal vein pressure and rebleeding rate in patients with CPVT.

关键词： Chronic portal vein thrombosis Transjugular intrahepatic portosystemic shunt Variceal bleeding Hepatic encephalopathy

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