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Processing of a low-costγ-γ'NiPtAl coating with improved oxidation resistance

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Rare Metals 2024年第6期43卷 2832-2841页

作者： Yan jiang liang-liang Wei jian He Hong-Bo Guo School of Materials Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of High-Temperature Structural Materials and Protective Coatings Ministry of Industry and Information TechnologyBeihang UniversityBeijing 100191China

A novelγ-γ'(Ni solid solution—Ni_(3)Al)NiPtAl coating was produced on advanced single-crystal(SC)superalloy N5 by electroplating of a thin Pt coating with~3μm in thickness followed by heat treatment at 1000℃in *** comparison,a traditionalγ-γ'NiPtAl coating was also produced by electroplating of a thick Pt coating with~6μm in thickness followed by heat treatment at 1100℃in *** novel coating has a mass gain of~0.5 mg·cm^(-2)after 100 h 1-h cyclic oxidation at 1150℃,showing better oxidation resistance than the traditional *** oxide scale mostly consisting ofα-Al_(2)O_(3)grew on the novel coating because the element Cr from the SC alloy substrate contributes to the formation ofα-Al_(2)O_(3).Pt content in the novel coating has significant effect on the oxidation *** optimized Pt content in the coating is about 16 at%,which is helpful to reduce the diffusion of harmful elements from the substrate into the coating but also to reduce the cost of the coating.

关键词： γ-γ'NiPtAl coating Platinum Oxidation Al_(2)O_(3) Superalloy

Anomalous microwave reflection from a metal surface induced by spoof surface plasmon

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Chinese Physics B 2012年第1期21卷 438-441页

作者： Wang liang Cao Jin-Xiang LŰyou Liu Lei Du Yin-Chang Wang jian Key Laboratory of Basic Plasma Physics of Chinese Academy of Sciences and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

The reflection of X-band microwaves （8-12 GHz） from a metallic aluminum （A1） surface with groove grating corrugations was investigated experimentally. It was shown that the reflection of p-polarization is much less than the microwave reflected from the corresponding area of an unruled Al surface, with selective wavelength. The experimental results demonstrated that the anomalous microwave reflection is strongly associated with the excitation of spoof surface plasmons at the Al air interface by the surface grating coupler. This near-total absence of reflected microwaves is similar to the famous Wood＇s anomaly in the optical regime and is of fundamental importance to the applications of spoof surface plasmons in the microwave regime.

关键词： spoof surface plasmons anomalous reflection metal surface

Evaluation of CMIP6 HighResMIP models in simulating precipitation over Central Asia

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Advances in Climate Change Research 2022年第1期13卷 1-13页

作者： liang-liang LI jian LI Ru-Cong YU College of Atmospheric Sciences Lanzhou UniversityLcmzhou 730000China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Research Center for Disastrous Weather Over Hengduan Mountains&Low-Latitude Plateau China Meteorological AdministrationKunming 650034China

The High Resolutio n Model Intercomparison Project(HighResMIP)experiment within the Coupled Model In tercomparison Project Phase 6(CMIP6),for the first time,has provided an opportunity to evaluate the performance of climate models over complex *** on the HighResMIP's historical simulations of atmospheric general circulation models,the performances of global high-resolution models,with a horizontal resolution finer than 50 km,in representing precipitation over Central Asia were evaluated using rain gauge observation *** the models successfully reproduce the large precipitation regions that are located over the mountainous areas and Northern Central ***,nearly all the models overestimate precipitation frequency over Central Asia and large overestimations of precipitation amount and frequency are located over the mountainous *** the HighResMIP multi-model ensemble mean performs better than all individual models at simulating the spatial pattern of precipitation frequency,it is inferior to HadGEM3-GC31-HM and ECMWF-IFS-HR at simulating that of precipitation *** simulation performance exhibits remarkable regional *** the Qilian Mountains,the relationship between precipitation and elevation is totally captured by climate *** contrast,over the Tianshan Mountains,the models fail to simulate the decrease in precipitation frequency after elevation higher than the maximum precipitation *** models successfully reproduce the annual cycle shape of precipitation amount over the Southern Central Asia,Qilian Mountains and Tianshan Mountains,but fail to reproduce it over the Northern Central *** than half of the high-resolution GCMs have a reduced bias relative to the corresponding low-resolution *** performances of most high-resolution GCMs in simulating precipitation pattern are well over the Tianshan Mountains.

关键词： CMIP6 HighResMIP Model evaluation Precipitation Elevation Central Asia

Improved sensing performance of WO_(3) nanoparticles decorated with Ag and Pt nanoparticles

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Rare Metals 2021年第6期40卷 1642-1650页

作者： Dong-liang Feng Zheng-you Zhu Ling-Ling Du Xia-Xia Xing Chen Wang jian Chen Yong-Tao Tian Da-Chi Yang Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology and Department of ElectronicsCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China School of Physics and Engineering and Key Laboratory of Materials Physics Ministry of EducationZhengzhou UniversityZhengzhou 450001China

Gas sensors built with metal oxide semiconductors have attracted tremendous attention due to the growing demand for the detection of inflammable,explosive and toxic ***,to improve the sensing response,WO_(3) nanoparticles decorated with Ag and Pt bimetals(Ag and Pt/WO_(3) NPs)have been developed via combined hydrolysis and hydrothermal *** sensors prototypes show high response to acetone(Ra/Rg=250@100×10^(-6),140℃),which is 6.1 fold as high as that of the pristine WO_(3) NPs(Ra/Rg=41@100×10^(-6),140℃).Moreover,the recovery time of Ag and Pt/WO_(3) NPs was reduced from 138 to 13 s compared with that of the pristine WO_(3) *** improved acetone sensing performance may be attributed to that the chemical and electronic sensitization of Ag and Pt to WO_(3) NPs increases adsorbed oxygen species,speeds up the reaction and thus boosts the sensing *** strategy that decoration of dual precious metals onto WO_(3) NPs improves the acetone sensing performance may be applied to the gas sensors of other sensing materials.

关键词： WO_(3)nanoparticles Ag and Pt bimetals Acetone sensing Chemical sensitization Recovery time

Thiazole-Flanked Thiazoloisoindigo as a Monomer for Balanced Ambipolar Polymeric Field-effect Transistors

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Chinese Journal of Polymer Science 2022年第10期40卷 1131-1140,I0006页

作者： Si-Yu Lv Qi-Yi Li Bo-Wen Li Jie-Yu Wang you-Bing Mu liang Li jian Pei Xiao-Bo Wan Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056China Beijing National Laboratory for Molecular Sciences the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 10087iChina School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China

Electron-rich thiophene-flanked thiazoloisoindigo(Th-TzII)has been reported as a building block for ambipolar polymeric field-effect transistors however with preferable hole ***,we report that by using an electron deficient thiazole as the flanked moiety,the corresponding thiazoloisoindigo(Tz-TzII)can still be synthesized,although in a more sinuous *** calculation and experimental results demonstrate that Tz-TzII is more electron-deficient than Th-TzII,and the corresponding polymer P(TzII-Tz-T-Tz)exhibits high and balanced hole/electron mobility of 0.70/0.64 cm^(2)·V^(-1)·s^(-1).

关键词： Thiazoloisoindigo Ambipolar Polymeric field-effect transistors

A Note on a Quadratic Rational Map with Two Siegel Disks

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Acta Mathematica Sinica,English Series 2010年第7期26卷 1393-1402页

作者： liang SHEN Sheng jian WU Department of Mathematics Beijing Institute of Technology Beijing 100081 P. R. China LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

Suppose f（z） is a quadratic rational map with two Siegel disks. If the rotation numbers of the Siegel disks are both of bounded type, the Hausdorff dimension of the Julia set satisfies Dim （J（f））〈2.

关键词： Hausdorff dimension Siegel disk porous set

AIC AR and Decitabine Enhance the Sensitivity of K562 Cells to Imatinib by Promoting Mitochondrial Activity

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Current Medical Science 2020年第5期40卷 871-878页

作者： Xiao-ying ZHU Wen LIU Hai-tao liang Ling TANG Ping ZOU Yong you Xiao-jian ZHU Institute of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Hematology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Although the advent of tyrosine kinase inhibitors(TKIs)has dramatically improved the survival of patients with chronic myeloid leukaemia(CML),acquired drug resistance and TKI-insensitive leukaemic stem cells(LSCs)remain major obstacles to a CML *** recent years,the reprogramming of mitochondrial metabolism has emerged as a hallmark of cancers,including CML,and in turn may be exploited for therapeutic ***,we investigated the effects of several drugs on the mitochondrial function of the CML cell line K562 and found that 5-aminoimidazole-4-carboxamide ribotide(AICAR)and decitabine could effectively increase the ATP content and mitochondrial *** addition,these two drugs induced cell cycle arrest and a decrease in colony-forming capacity and promoted K562 cell ***,we demonstrated that treatment with AICAR or decitabine enhanced the sensitivity o f K562 cells to imatinib,as evidenced by a combination treatment ***,our findings indicate that TKIs combined with mitochondrial regulation may provide a therapeutic strategy for the treatment of CML.

关键词： chronic myeloid leukaemia mitochondrial activity 5-aminoimidazole-4-carboxamide ribotide(AICAR) decitabine

Incidence,prognosis,and risk factors of sepsis-induced cardiomyopathy

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World Journal of Clinical Cases 2021年第31期9卷 9452-9468页

作者： Yan-Wen liang you-Feng Zhu Rui Zhang Min Zhang Xiao-Ling Ye jian-Rui Wei Department of Intensive Care Unit Guangzhou Red Cross HospitalGuangzhou 510220Guangdong ProvinceChina Department of Geriatrics The Affiliated Hospital of Qingdao UniversityQingdao 270000Shandong ProvinceChina Guangzhou Women and Children’s Medical Center Guangzhou 510000Guangdong ProvinceChina

BACKGROUND At present,large-scale studies on the clinical characteristics of sepsis-induced cardiomyopathy(SIC)are *** To investigate the clinical characteristics of *** Based on the analysis of the MIMIC-III public database,we performed a largescale retrospective study involving sepsis patients who were admitted to the intensive care unit(ICU)and had no concomitant cardiac *** used propensity score matching analysis and multivariate logistic regression to ensure the robustness of the *** primary outcome was hospital mortality,and the secondary outcomes included the number of patients who received mechanical ventilation or renal replacement therapy during their hospital stay,the number of patients administered with vasopressors,the length of ICU stay,and the length of hospital *** In the present study,after screening 38605 patients,3530 patients with sepsis were included.A total of 997 patients met the SIC diagnostic criteria,and the incidence of SIC was 28.20%(95%confidence interval[CI]:26.80%-29.70%).Compared to patients in the non-SIC group,patients in the SIC group were of older age and had a higher Simplified Acute Physiology Score(SAPS)-Ⅰ score,SAPS-Ⅱ score,and Elixhauser comorbidity index(ECI).A total of 367(36.8%)of 997 patients in the SIC group and 818(32.3%)of 2533 patients in the non-SIC group died in the hospital,which resulted in a significant between-group difference(odds ratios=1.22,95%CI:1.05-1.42;P=0.011).For the secondary outcomes,more patients in the SIC group received mechanical ventilation and *** logistic regression analysis showed that age,male sex,ECI,hemoglobin level,diabetes,and mechanical ventilation use on the first day of ICU admission were risk factors for *** Compared with non-SIC patients,hospital mortality is higher in SIC patients.

关键词： Sepsis-induced cardiomyopathy Sepsis Septic shock Incidence Hospital mortality MIMIC-Ⅲ

Stereocontrolled Synthesis of Optically Active Aggregation Pheromone of Lesser Grain Borer

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Chemical Research in Chinese Universities 1994年第1期10卷 54-58页

作者： Pan, Yi-jun jian, Ji-long Huang, Jin-xia Wu, you-liang Xu, Zhang-huang

ＳｔｅｒｅｏｃｏｎｔｒｏｌｌｅｄＳｙｎｔｈｅｓｉｓｏｆＯｐｔｉｃａｌｌｙＡｃｔｉｖｅＡｇｇｒｅｇａｔｉｏｎＰｈｅｒｏｍｏｎｅｏｆＬｅｓｓｅｒＧｒａｉｎＢｏｒｅｒＰＡＮＹｉ－ｊｕｎ；ＪＩＡＮＪｉ－ｌｏｎｇ；ＨＵＡＮＧＪ... 详细信息

ＳｔｅｒｅｏｃｏｎｔｒｏｌｌｅｄＳｙｎｔｈｅｓｉｓｏｆＯｐｔｉｃａｌｌｙＡｃｔｉｖｅＡｇｇｒｅｇａｔｉｏｎＰｈｅｒｏｍｏｎｅｏｆＬｅｓｓｅｒＧｒａｉｎＢｏｒｅｒＰＡＮＹｉ－ｊｕｎ；ＪＩＡＮＪｉ－ｌｏｎｇ；ＨＵＡＮＧＪｉｎ－ｘｉａ；ＷＵＹｏｕ－ｌｉａｎ...

关键词： Dominicalures Cyanocuprate Stereospecific Synthesis