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In-flight particle characterization and coating formation under low pressure plasma spray condition

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Journal of Iron and Steel Research International 2017年第3期24卷 306-312页

作者： Nan-nan Zhang Dan-yang lin ya-li li Yue Zhang Marie-pierre Planche Han-lin liao Christian Coddet Fu-yu Dong Department of Material Science and Engineering Shenyang University of Technology IRTES-LERMPS University of Technology of Belfort-Montbeliard

Yttria-stabilized zirconia（ YSZ） coatings were deposited by low pressure plasma spray（ LPPS） in 1.0× 10^4 Pa,1.5 × 10^4 Pa,and 2.5 × 10^4 Pa. Both in-flight particle diagnostic detected by DPV-2000 system and ANSYS-FLUENT software were used to study the connection between the parameters of flying particles and the coating formation,which might help to recognize the relationship between the operation parameters and the coatings quality. The results of simulation showed that particles in a lower spray pressure could achieve a higher velocity. The particle velocity was around 380 m/s at a distance of 35 cm from the nozzle at 1.0 × 10^4 Pa while only 300 m/s at 2.5 × 10^4 Pa in actual *** results showed that the velocity of particles increased with decreasing the spray pressure,which might enhance the flattening rate of coatings and thereby decreased the porosity. The deposited YSZ coating with the lowest porosity can be gained under 1.0 × 10^4 Pa condition.

关键词： In-flight particle detection Low pressure plasma spray Yttria-stabilized zirconia coating Flame simulation

Fixed-Time Anti-Disturbance Average-Tracking for Multi-Agent Systems Without Velocity Measurements

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Journal of Systems Science & Complexity 2024年第3期37卷 985-1002页

作者： li Yuling liU Chenglin ZHANG ya CHEN yangyang Key Laboratory of Advanced Process Control for light Industry(Ministry of Education) Institute of AutomationJiangnan UniversityWuci 214122China School of Automation Southeast UniversityNanjing 210096China

In this paper,the authors tackle a fixed-time average-tracking problem for multi-agent systems which do not require velocity measurements and are affected by external mismatched and matched *** objective requires the considered agents with second-order dynamics to follow the average value of several time-varying reference signals,each of which is acquired by only one *** of all,the average value is estimated by using a novel distributed average estimator in a fixed ***,an original observer is created to provide estimated values in a fixed time for external mismatched and matched disturbances as well as unmeasured velocities of ***,the authors propose a novel fixed-time anti-disturbance average-tracking protocol with the aid of the observer and a sliding mode *** the end,the feasibility of theoretical analysis is illustrated by some simulation experiments.

关键词： Average-tracking control fixed-time algorithm fixed-time observer mismatched distur-bances multi-agent systems velocity measurements

Estimation Study of New Cancer Cases and Deaths in Wuwei, Hexi Corridor Region, China, 2018

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Biomedical and Environmental Sciences 2017年第11期30卷 829-833页

作者： CAO Bo Yu li Cheng Yun XU Feng Lan liU Xiao Qin yaNG yan Xu li Jing GAO Cai Yun RONG You Ming li Rong Cheng li ya li ZHENG Shan BAI ya Na YE yan Cheng Institute of Epidemiology and Statistics School of Public Health Center for Cancer Prevent and Treatment Lanzhou University Department of Cancer Epidemiology Wuwei Cancer Registry Gansu Wuwei Tumor Hospital

Population-based cancer registration data were collected to estimate the cancer incidence and mortality in Wuwei, Hexi Corridor Region, China in 2018. We used the 2011-2013 data to predict the number of new cases and deaths in 2018 and the 2003-2013 data to analyze trends in cancer incidence and mortality. The goal is to enable cancer prevention and control directions. Our results indicated that stomach cancer is the most common cancer. For all cancers combined, the incidence and mortality rates showed significantly increasing trends（＋2.63% per year; P 〈 0.05 and ＋1.9% per year; P 〈 0.05）. This study revealed a significant cancer burden among the population of this area. Cancer screening and prevention should be performed after an epidemiological study of the cause of the cancer is completed.

关键词： Estimation Study of New Cancer Hexi Corridor Region

Frozen sand-concrete interface direct shear behavior under constant normal load and constant normal height boundary

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第11期23卷 917-932页

作者： Jian CHANG Jian-kun liU ya-li li School of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China School of Civil Engineering Sun Yat-sen UniversityZhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The shear strength properties of the frozen sand–structure interface are critical for evaluating the serviceability of pile foundations in frozen *** shear characteristics of the frozen sand–concrete interface were studied with two boundary conditions(constant normal load(CNL)and constant normal height(CNH)),at three normal stresses(100,200,and 300 k Pa),and at three temperatures(-2,-5,and-8℃).A detailed comparative analysis was performed to explore the principal factors affecting the shear/normal-shear *** results showed that the shear behavior of the frozen sand–concrete interface under CNL was similar to that under *** shear stress–shear displacement exhibited strain *** temperature and normal stress were the major influences on normal *** lower the temperature and the higher the normal stress,the greater was the elastic shear *** peak shear stress and critical shear stress exhibited a dependence on normal *** exponential growth in the peak shear stress was observed as the temperature *** shear stress was dependent on *** value and percentage of peak ice-cementation in peak shear stress was affected by temperature and normal stress.

关键词： Frozen sand–concrete interface Peak shear strength Critical shear strength Ice-cementation Boundary condition

Shenqi Xingnao Granules ameliorates cognitive impairments and Alzheimer’s disease-like pathologies in APP/PS1 mouse model

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Chinese Herbal Medicines 2020年第4期12卷 421-429页

作者： Cui-cui yang Xiao-yu Jia li Zhang ya-li li Zhan-jun Zhang lin li Lan Zhang Department of Pharmacy Xuanwu Hospital of Capital Medical UniversityBeijing Institute for Brain DisordersBeijing Engineering Research Center for Nerve System DrugsKey Laboratory for Neurodegenerative Diseases of Ministry of EducationBeijing 100053China State Key Laboratory of Cognitive Neuroscience and Learning&IDG/McGovern Institute for Brain Research Beijing Normal UniversityBeijing 100875China BABRI Centre Beijing Normal UniversityBeijing 100875China

Objective:Alzheimer’s disease(AD)is along with cognitive decline due to amyloid-β(Aβ)plaques,tau hyperphospho rylation,and neuron *** Xingnao Granules(SQXN),a traditional Chinese medicine,significantly ameliorated the cognitive function and daily living abilities of patients with ***,till date,no study has investigated the mechanism of action of SQXN on *** present study aimed to verify the effects of SQXN treatment on cognitive impairments and AD-like pathologies in APP/PS1 ***:Four-month-old APP/PS1 transgenic(Tg)mice were randomly divided into a model group and SQXN-treated(3.5,7,14 g/kg per day)***-memory abilities were determined by Morris water maze and object recognition *** mice were sacrificed and the brain samples were collected after 75 *** soluble Aβcontents were detected by Elisa kit;The levels of expression of NeuN,APP,phosphorylated tau and related protein were measured by Western blotting;The inflammation factors were detected by the proinflammatory panel ***:Four-month-old APP/PS1 mice were administered SQXN by oral gavage for 2.5 *** the Morris water maze tests and Novel object recognition,we found that SQXN restored behavioral deficits in the experimental group of Tg mice when compared with the *** also inhibited neuronal loss(NeuN marker).SQXN treatment decreased soluble Aβ42 through inhibiting the expression of sAPPβand BACE-1 without regulating full-length amyloid precursor protein(FL APP).Insulin degrading enzyme(IDE),the Aβdegrading enzyme,were increased by *** addition,SQXN reduced hyperphosphorylated tau protein levels and prevented excessive activation of p-GSK-3βin the brain of APP/PS1 *** with APP/PS1 transgenic negative mice,IFN-γ,IL-1β,IL-2,IL-4,IL-5,IL-6,IL-12 p70,KC/GRO and TNF-αwere not obviously changed in the brain of 6.5-month-old APP/PS1 transgenic(Tg)***,SQXN could inhibited the expression of ***:These results demonstrate

关键词： Aβ Alzheimer’s disease APP/PS1 inflammation neuronal loss Shenqi Xingnao Granules tau phosphorylation

Solidification crack characteristics and sensitivity of peritectic steel

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Journal of Iron and Steel Research International 2024年第7期31卷 1668-1679页

作者： ya-qiang li Jian-hua liu Zi-ming Wang Ying-ying li yang He Xiao-wei li Department of Automotive Engineering Hebei Vocational University of Technology and EngineeringXingtai 054000HebeiChina Hebei Special Vehicle Modification Technology Innovation Center Hebei Vocational University of Technology and EngineeringXingtai 054000HebeiChina Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China School of Petroleum and Natural Gas Engineering Changzhou UniversityChangzhou 213164JiangsuChina

The characteristics and sensitivity of solidification cracks in peritectic steels were investigated using directional solidifi-cation *** cracks were observed in both hypoperitectic steels(12CrlMoV,15CrMo)and hyper-peritectic steel(20CrMo)during solidification at growth velocities of 15,50,and 80 pm/*** the dendritic boundaries,sulphide precipitates were found,promoting crack *** on the statistical analysis of interdendritic cracks in peritectic steels,the area ratio(RA)of interdendritic cracks in a directional solidification structure was proposed to evaluate the crack sensitivity of peritectic ***,the crack sensitivities of peritectic steels(12CrlMoV,15CrMo,and 20CrMo)were tested,evaluated,and compared with the surface crack rates of three types of steels produced from a steel *** results demonstrated that RA was in good agreement with that of the steel plant,and the crack sensitivity of 12CrlMoV steel was the strongest,followed by that of 15CrMo and 20CrMo ***,RA can be used to evaluate the crack sensitivity of peritectic steel.

关键词： Peritectic steel-Directional solidification Growth velocity Dendritic structure Solidification crack Crack sensitivity

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

Effects of Potassium-Solubilizing Bacteria on Growth, Antioxidant Activity and Expression of Related Genes in Fritillaria taipaiensis P. Y. li

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 789-806页

作者： Jiaqi Lang Mingyan Ye ya Luo Yueheng Wang Zhifen Shi Xiaotian Kong Xuan li Nong Zhou Chongqing Engineering Laboratory of Green Planting and Deep Processing of Famous-Region Drug in the Three Gorges Reservoir Region College of Biology and Food EngineeringChongqing Three Gorges UniversityChongqing404120China College of Modern Chinese Medicine Industry Chengdu University of Traditional Chinese MedicineChengdu611130China College of Pharmacy Dali UniversityDali671000China

This study aimed to examine the effects of inoculating Fritillaria taipaiensis *** leaves with different strains ofpotassium-solubilizing bacteria (KSB), or combinations thereof, focusing on aspects of photosynthesis and physiologicaland biochemical characteristics. At present, some studies have only studied the rhizosphere microbialcommunity characteristics of F. taipaiensis and have not discussed the effects of different microbial species on thegrowth promotion of F. taipaiensis. This paper will start from the perspective of potassium-solubilizing bacteria toconduct an in-depth study. Seed cultivation commenced at the base with three different KSBs in early October2022. The growth of F. taipaiensis leaves was observed after different treatments. Both single-plant and compoundinoculations were executed. A total of eight treatment groups were established, with aseptic fertilizer and sterilizedsoil functioning as the control group. The results reveal that intercellular CO_(2) concentration (Ci), stomatal conductance(Gs), and transpiration rate (Tr) were at their apex in the S7 group. Most treatment groups exhibited anincrease in leaf area, photosynthetic pigment content, soluble sugar, soluble protein, Superoxide Dismutase(SOD), Peroxidase (POD), Catalase (CAT) activities, and proline content. The expression levels of POD, SOD,and CAT genes were evaluated, following inoculation with different KSB. The highest was the S7 group. Theinoculation with various KSB, or combinations thereof, appears to bolster the growth and development of F. *** composite inoculation group S7, comprising Bacillus cereus, Burkholderia cepacia, and Bacillus subtilis,manifested the most favorable impact on the diverse indices of F. taipaiensis, thereby furnishing valuableinsights for the selection of bacterial fertilizer in the artificial cultivation of F. taipaiensis.

关键词： Fritillaria taipaiensis bacteria antioxidant enzyme genes leaf physiology and biochemistry photosynthetic characteristics

T3098C and T53C Mutations of HBV Genotype C Is Associated with HBV Infection Progress

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Biomedical and Environmental Sciences 2009年第6期22卷 511-517页

作者： SU-ZHEN JIANG ZHI-YONG GAO TONG li ,ya-JUAN li XIANO-MEI CHEN liNG WANG FENG-MIN LU HUI ZHUANG Department of Microbiology Peking University Health Science Center Beijing 100191 China

Objective To analyze the association between mutation（s） in preS region of HBV and hepatitis B disease progress in Chinese patients with genotype C chronic HBV infection. Methods Ninety-three patients with chronic genotype C HBV infection, including 24 asymptomatic carriers （ASC）, 26 patients with chronic hepatitis B （CHB）, 22 patients with liver cirrhosis （LC） and 21 HCC patients were investigated. Levels of HBV DNA, HBeAg, alanine aminotransferase （ALT）, asparate transaminase （AST） were measured. HBV preS region was analyzed by PCR direct sequencing. Results The prevalence of preS T3098C and T53C mutations ofgenotype C HBV was significantly higher in LC and HCC patients than ASC and CHB patients. The rate ofT3098C mutation in ASC, CHB, LC, and HCC patients were 0.00% （0/24）, 3.85% （1/26）, 9.09% （2/22）, and 30.77% （8/22）, respectively （P=0.0015）, while the rate of T53C mutation was I2.50% （3/24）, 3.85% （1/26）, 40.91% （9/22）, and 42.31% （11/26）, respectively （P=0.0012）. Conclusion The frequency of genotype C HBV preS T3098C and T53C mutations is associated with hepatitis B infection progression.

关键词： Hepatitis B virus (HBV) Genotype C pre S Mutation Hepatocellular carcinoma (HCC)