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Elaborating strengthen mechanism of Pt-Ir solid solution superalloy at finite temperature

Rare Metals 2024年第3期43卷 1243-1256页

作者： Wei Yu Xiao-Yu Chong Yun-Xuan Zhou Meng-Di Gan Ying-Xue Liang Yan Wei ai-min zhang Chang-Yi Hu Xing-Yu Gao Li Chen Hai-Feng Song Jing Feng Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming650093China Yunnan Precious Metals Laboratory Co.LTD Kunming650106China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing100088China

Pt-Ir alloy is potential superalloys used above 1300℃because of their high strength and creep ***,the ductility of Pt-Ir alloy has rapidly deteriorated with the increase of Ir,resulting in poor *** work quantitatively evaluated the solid solution strengthening(SSS)and grain refinement strengthening(GRS)of Pt-Ir alloy using first-principles calculations combined with experimental ***,the stretching force constants in the second nearest neighbor region(SFC^(2nd))of pure Ir(193.7 eV·nm^(-2))are 3.40 times that of pure Pt(57.0 eV·nm^(-2)),i.e.,the interatomic interaction is greatly enhanced with the increase of Ir content,which leads to the decrease of ductility,and modulus misfit plays a dominant role in ***,the physical mechanisms responsible for the hardness(H_(V))of Pt-Ir alloy,using the power-law-scaled function of electron work function coupled SSS and GRS,are attributed to the electron redistribution caused by different Ir ***,a thorough assessment of the thermodynamic characteristics of Pt-Ir binary alloy was conducted,culminating in development of a mapping model that effectively relates enmposition,temperature and *** results revealed that the compressive strength incrcases with the Ir content,and the highest strength was observed in Pt_(0.25)Ir_(0.75).This study provides valuable insights into the Pt-Ir alloy system.

关键词： Elastic properties Phonon Solid solution strengthen Force constants CALPHAD

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High temperature determines the ups and downs of small brown planthopper Laodelphax striatellus population

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Insect Science 2013年第3期20卷 385-392页

作者： Xiang-Dong Liu ai-min zhang Department of Entomology Nanjing Agricultural University Nanjing China

Small brown planthopper, Laodelphax striatellus （Fall6n） numbers usually drop sharply in the summer and revive quickly in the autumn. However, it is unclear whether and how the high temperature plays a role in this process. The effects of durations of heat exposure （33~C） on life-history traits were examined here. Exposure of adults for 1 day during the oviposition stage led to a very low survival of nymphs. The average longevity ofL. striatellus exposed for 1-31 days from oviposition was significantly longer than that of the control （27℃）. Short-term （1-5 days） heat exposure of the third instar nymphs did not significantly influence eclosion, but exposure of the fourth instar nymphs significantly increased eclosion. Lifespan from egg to adult was significantly lengthened when the third instar nymphs were exposed to heat for 2-15 days, or the fourth instar were exposed for 10 days. The preoviposition period was prolonged by heat exposure of the third or fourth instar nymphs. Short-term heat exposure of less than 3 days of the third or fourth instar nymphs did not restrict fecundity, but when the exposure duration exceeded 5 days the total eggs per female and hatchability decreased. Exposure to high temperature increased the brachypter rate of adults. In summary, low survival and slowing development under heat exposure resulted in population decline in the summer, and the relatively high fecundity and brachypter rate led to quick revival in autumn. Temperature in the summer determines the rise and fall in numbers ofL. striatellus.

关键词： development fecundity heat exposure Laodelphax striatellus wing form

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Creating Wheat Germplasm for High Quality Breeding by Monosomic Backcrossing

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Journal of Integrative Plant Biology 2006年第10期48卷 1210-1215页

作者： Yan-Mei Wang Jun Ji Dao-Wen Wang Zheng-Bin zhang ai-min zhang Center for Agricultural Resources Research Institute of Genetic and Developmental Biology Academy of Sciences Shijiazhuang 050021 China National Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

By crossing bread wheat cultlvar GC8901 with the 1D monosonlc line of Xiaoyan No. 6 and backcrosslng the offsprlng with the Xlaoyan No. 6 1D monosonlc llne for 5 years, high-molecular-welght glutenin subunlts 1Dx5＋1Dy10 from GC8901 have been transferred Into wheat cultivar Xiaoyan No. 6. The BC5F1 offspring lines had been detected by using methods of cytology, marker, molecular marker and six elite single plants with high molecular-welght glutenin subunlts： lAx1, 1Bx14＋1 By15, 1Dx5＋1 Dy10 were Identified. Those lines have high-yleld potential with better agronomic characters and have been used In high quality wheat breeding processes as well.

关键词： germplasm for high quality breeding high-molecular-weight glutenin subunits monosomic backcrossing wheat

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Preoperative differential diagnosis between intrahepatic biliary cystadenoma and cystadenocarcinoma:A single-center experience

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World Journal of Gastroenterology 2014年第35期20卷 12595-12601页

作者： Fu-Bo zhang ai-min zhang Zhi-Bin zhang Xin Huang Xi-Tao Wang Jia-Hong Dong Department of Hepatobiliary Surgery Chinese PLA General Hospital Medical School Nankai University Department of Tuberculosis Binzhou Center Hospital

aiM: To investigate preoperative differential diagnoses made between intrahepatic biliary cystadenoma and intrahepatic biliary cystadenocarcinoma. METHODS: A retrospective analysis of patient data was performed, which included 21 cases of intrahepatic biliary cystadenoma and 25 cases of intrahepatic biliary cystadenocarcinoma diagnosed between April 2003 and April 2013 at the General Hospital of PLA. Potential patients were excluded whose diagnoses were not confirmed pathologically. Basic information (including patient age and gender), clinical manifestation, duration of symptoms, serum assay results (including tumor markers and the results of liver function tests), radiological features and pathological results were collected. All patients were followed up. RESULTS: Preoperative levels of cancer antigen 125 (12.51 +/- 9.31 vs 23.20 +/- 21.86, P minotransferase, aspartate aminotransferase, total bilirubin (TBIL), and direct bilirubin (DBIL) between the two groups. However, eight of the 21 patients with cystadenoma and six of the 25 patients with cystadenocarcinoma had elevated levels of TBIL and DBIL. There were three cases in the cystadenoma subgroup and six cases in the cystadenocarcinoma subgroup with postoperative complications. CONCLUSION: Preoperative differential diagnosis relies on the integration of information, including clinical symptoms, laboratory findings and imaging results. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.

关键词： Intrahepatic biliary cystadenoma Intrahepatic biliary cystadenocarcinoma Preoperative differential diagnosis

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Simple preparation and catalytic properties of ZnO for ozonation degradation of phenol in water

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Chinese Chemical Letters 2011年第2期22卷 209-212页

作者： Yu ming Dong Guang Li Wang Ping Ping Jiang ai min zhang Lin Yue Xiao ming zhang School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China School of Chemistry and Chemical Engineering Key Laboratory of Mesoscopic Chemistry Nanjing University Nanjing 210093 China School of Food Science and Technology Jiangnan University Wuxi 214122 China Received 28 June 2010

ZnO particles about 200 nm were prepared through a facile hydrothermal *** with single ozonation,the degradation efficiency of phenol increased about 23.7%and the degradation efficiency of intermediates improved about four times in the presence of ZnO at 298 *** addition,the catalyst had good stability in the ozonation *** influence of temperature was investigated and it was found that the better catalysis efficiency could be obtained at lower temperature.

关键词： Organic pollutants Water treatment Ozone Catalysis

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Further Analysis of the Function of AtBHLH29 in Regulating the Iron Uptake Process in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2006年第1期48卷 75-84页

作者： Juan zhang Hui-Fen Zhu Hui Liang Kun-Fan Liu ai-min zhang Hong-Qing Ling Dao-Wen Wang Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Using T-DNA insertion and chemical mutants, two recent studies have shown that AtBHLH29, encoding a putative basic helix-loop-helix （BHLH） protein, is involved in regulating the iron uptake process in Arabidopsis thaliana. Herein, we report that RNA interference （RNai） mutants can be used to reveal more accurately the genetic function of AtBHLH29. We compared the iron deficiency responses of seven RNai strains that contained decreasing amounts of AtBHLH29transcripts. Under high iron conditions （50 μmol/L iron）, only in the most severe RNai strains （R101, R111, and R119） was plant growth significantly retarded. However, these mutants could still survive and produce seeds. This suggests that the function of AtBHLH29 is beneficial, but not absolutely essential, to plant growth when iron supply is not limiting. Under low iron conditions （less than 10 μmol/L iron）, the Rlll and R119 strains died prematurely, demonstrating that AtBHLH29 is absolutely necessary for plant survival when iron supply is restricted. The transcription of AtBHLH29 was essential for the expression of AtFRO2 （encoding the ferric chelate reductase）. In contrast, the expression of AtlRT1 （encoding the high-affinity iron transporter） was not so strongly dependent upon the transcription of AtBHLH29. By transient expression, we found that the AtBHLH29-GUS fusion protein was targeted specifically to the nucleus in plant cells. Interestingly, the nuclear localization of AtBHLH29-GUS was abolished when the four consecutive arginine residues located in the basic region of the putative AtBHLH29 protein were replaced by alanine residues by mutagenesis. The implications of our findings on further studies of the mechanism underlying the function of AtBHLH29 are discussed.

关键词： Arabidopsis AtBHLH29 basic helix-loop-helix protein iron RNA interference.

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A NOVEL METHOD OF SECONDARY SYNTHESIS OF FeY ZEOLITE

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Chinese Chemical Letters 1995年第10期6卷 911-914页

作者： ai min zhang Shu Lin BAO Qin Hua XU (Department of Chemistry, Nanjing University, Nanjing, 210093) Nanjing Univ Dept Chem Nanjing 210093 Peoples R China

FeY zeolites were prepared by three different secondary synthetic methods. Samples were characterized with XRD, IR, ESR, MBS and XPS techniques. The results showed that more iron ions were inserted into the framework of zeolite when the sample was pretreated with (NH4)(2)SiF6 aqueous solution. The structure of such zeolites has obviously changed due to the iron ions inserted into the framework.

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Portable Analyzer for Rapid Analysis of Total Protein, Fat and Lactose Contents in Raw Milk Measured by Non-dispersive Short-wave Near-infrared Spectrometry

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Chemical Research in Chinese Universities 2013年第1期29卷 15-19页

作者： FENG Xu-dong SU Rui XU Nan WANG Xing-hua YU ai-min zhang Han-qi CAO Yan-bo College of Chemistry Jilin University Changchun 130012 P. R. China

A novel portable analyzer for raw milk quality control during the material purchase at dairy plants was developed, by which the percentages（mass fraction） of main components including total protein, fat, and lactose of an unhomogenized milk sample could be determinated in 1 min with the help of non-dispersive short-wave near-infrared （NDSWNIR） spectrometry in a wavelength range from 600 nm to 1100 nm and multivariate calibration. The analyzer was designed with a single-beam optical system, which comprised a temperature control module, a multi-channel narrow-band light source（16 wavelengths）, a glass absorption cell with 15 mm sample thickness, a silicon photodiode detector, several compound lenses and a recorder module. A total of 80 raw milk samples were collected at a dairy farm twice a month for 4 months. The samples were scanned with a common UV-Vis-NIR spectrometer and analyzed according to China GB standard methods. The uninformative variables elimination（UVE） method was carried out on the spectrum data and the percentages of main components of all the samples to choose the peak emitting wavelength of each channel of the light source. Another 90 raw milk samples were collected from the same dairy farm thrice a month for 3 months. The samples were analyzed according to China GB standard methods and with the proposed analyzer. The percentages of the main components and the NDSWNIR absorption data of the samples were used for the construction and validation of the multivariate calibration model with partial least squares（PLS） method. The root-mean-square errors of prediction（RMSEP） of total protein, fat and lactose were 0.201, 0.172 and 0.247 and the coefficients of correlation（R） were 0.932, 0.981 and 0.933, respectively.

关键词： Portable analyzer Raw milk Non-dispersive short-wave near-infrared(NDSWNIR) spectrometry Multiva-riate calibration

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Hepatic Resection Versus Stereotactic Body Radiation Therapy Plus Transhepatic Arterial Chemoembolization for Large Hepatocellular Carcinoma:A Propensity Score Analysis

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Journal of Clinical and Translational Hepatology 2021年第5期9卷 672-681页

作者： Jing Sun Wen-Gang Li Quan Wang Wei-Ping He Hong-Bo Wang Ping Han Tao zhang ai-min zhang Yu-Ze Fan Ying-Zhe Sun Xue-zhang Duan Radiation Oncology Department Fifth Medical Center of Chinese PLA General HospitalBeijingChina Department of Hepatic Surgery Fifth Medical Center of Chinese PLA General HospitalBeijingChina

Background and aims:There are no comparative studies on the efficacy of hepatic resection(HR)and CyberKnife stereotactic body radiation therapy(CK-SBRT)plus transhepatic arterial chemotherapy embolization(TACE)in the treatment of large hepatocellular carcinoma(HCC).Therefore,this study aimed to compare the efficacy of HR and CKSBRT+TACE in large ***:A total of one hundred and sixteen patients were selected from November 2011 to December *** them,50 were allocated to the CKSBRT+TACE group and 66 were allocated to the HR *** Kaplan-Meier method was applied to calculate overall survival(OS)and progression-free survival(PFS)*** score matching was performed to control for baseline differences between the ***:Thirtysix paired patients were selected from the CK-SBRT+TACE and HR *** propensity score matching,the 1-,2-and 3-year OS rates were 83.3%,77.8%and 66.7%in the HR group and 80.6%,72.2%and 52.8%in the CKSBRT+TACE group,*** 1-,2-and 3-year PFS rates were 71.6%,57.3%and 42.3%in the HR group and 66.1%,45.8%and 39.3%in the CK-SBRT+TACE group,respectively(OS:p=0.143;PFS:p=0.445).Both a high platelet count and low alpha-fetoprotein value were revealed as influencing factors in improving OS and ***:CK-SBRT+TACE brought local effects that were similar to those of HR in HCC patients with a large and single ***,the liver injury occurrence rate was acceptable in both groups.

关键词： CyberKnife Radiation-induced liver disease Survival rates Large hepatocellular carcinoma

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Pricing Guaranteed minimum Death Benefits with Dollar Cost Averaging Under Time-changed Le′vy Models

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Acta Mathematicae Applicatae Sinica 2024年

作者： Jia-ming WANG Mei-qiao ai Zhi-min zhang College of Mathematics and Statistics Chongqing University

In this paper, we propose an efficient and accurate method for pricing Guaranteed minimum Death Benefit (GMDB) under time-changed Le′vy processes. Suppose that the GMDB payoff depends on a dollar cost averaging (DCA) style periodic investment, and the activity rate process in stochastic time change is modeled by a square-root process. We develop a recursive method to derive the closed form valuation formula by using the frame duality projection method. Numerical examples are reported for demonstrating the effectiveness of our approach and illustrating the interplay between contract parameters and the valuation.

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