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Ultra-high cycle fatigue behavior of high strength steel with carbide-free bainite/martensite complex microstructure

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International Journal of Minerals,Metallurgy and Materials 2009年第3期16卷 285-292页

作者： Xue-xia Xu yang Yu wen-long Cui Bing-zhe Bai Jia-lin Gu Laboratory of Advanced Materials Department of Materials Science and Engineering Tsirtghua University Beijing 100084 China

The ultra-high cycle fatigue behavior of a novel high strength steel with carbide-free bainite/martensite （CFB/M） complex microstructure was studied. The ultra-high cycle fatigue properties were measured by ultrasonic fatigue testing equipment at a frequency of 20 kHz. It is found that there is no horizontal part in the S-N curve and fatigue fracture occurs when the life of specimens exceeds 10^7 cycles. In addition, the origination of fatigue cracks tends to transfer from the surface to interior of specimens as the fatigue cycle exceeds 10^7, and the fatigue crack originations of many specimens are not induced by inclusions, but by some kind of ＂soft structure＂. It is shown that the studied high strength steel performs good ultra-high cycle fatigue properties. The ultra-high fatigue mechanism was discussed and it is suggested that specific CFB/M complex microstructure of the studied steel contributes to its superior properties.

关键词： high strength steel ultra-high cycle fatigue bainite martensite fatigue behavior

Expansin Genes Expressed Differentially in Peduncle Elongation of Near-Isogenic Wheat Rht Lines

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Journal of Integrative Agriculture 2014年第10期13卷 2091-2101页

作者： WANG Jia-li LIU Dong-cheng GUO Xiao-li yang wen-long ZHANG Ai-min State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of Sciences Institute of Shandong River Wetlands College of Biology China Agricultural University The Collaborative Innovation Center for Grain Crops in Henan College of AgronomyHenan Agricultural University

The introduction of reduced height （Rht） genes Rht-Blb and Rht-Dlb led to impressive increases in wheat （Triticum aestivum L.） yields during the Green Revolution. In the present study, the dynamic elongation of peduncle in a set ofnear-isogenic lines （NILs） carrying different Rht alleles （Rht-Blb, Rht-Dlb, Rht-Blc, Rht-Dlb＋Rht-Blb, and Rht-Dlb＋Rht-Blc） were investigated. The reduction of the final length of peduncle in NILs was dependent mainly on the elongation rate, which was reduced by Rht genes, during rapid elongation phase. Resin sections showed that Rht genes strongly reduced the cell extension in peduncle. The expression of expansin genes, which mediate cell wall loosening and leading to cell expansion, were analysed by using real- time quantitative PCR （qPCR）. Among the 23 possible wheat expansin genes, 17 were expressed in the peduncle. The spatial distribution of expression was further analysed for five expansins that showed high expression levels in the peduncles of Rht lines. Compared to wild type plants, the incorporation of Rht-Dlb allele decreased about 37 and 80% of the expression levels of ExpA 7 and ExpA3 in elongation zone, respectively. The presence Rht-Blc dwarfing genes, however, produced 53% reduction in the expression level of ExpA7, and seriously decreased about 70% of ExpB9 expression. Although the expression levels of five genes exhibited variability among the lines, an expansin gene, ExpB2, showed its expression level highly associated with the cell elongation rate in peduncle of different Rht lines.

关键词： expansin peduncle gene expression dwarfing gene

Upconversion Emission Properties of Erbium-and Ytterbium-Doped Potassium Lithium Tantalate Niobate Ceramics

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Chinese Physics Letters 2013年第12期30卷 116-119页

作者： LI Lei ZHOU Zhong-Xiang yang wen-long LI Huan WU Ye Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology Hohai UniversityChangzhou 213022 Department of Physics Harbin Institute of TechnologyHarbin 150001

We investigate the luminescence properties of erbium-doped and erbium-ytterbium-codoped potassium lithium tantalate niobate ceramics prepared by the solid phasesyntheses *** crystalline structure and surface morphology of these ceramics are tested by x-ray diffraction and scanning electron *** green,red,and near-infrared upconversion photoluminescence properties are analyzed by the steady-state spectra under 975 nm and 800 nm *** ceramics arewell sintered and tetragonal tungsten type crystalline structure with the 4 mm point group and the P4bm space *** Er3+upconversion emission integrated intensities increase with theincrease in Er3+ion concentration,while the green emissiondecreases with the increase in Yb^(3+)ion concentration under the 800 nm *** effective energy back transfer process from the Er^(3+)^(4)S_(3/2)state to Yb^(3+)ground state plays an important role in enhancing the red emission and weakening the green emission.

关键词： ceramics crystalline Potassium

Structural, Electronic and Optical Properties of KTa_(0.5)Nb_(0.5)O_(3) Surface: A First-Principles Study

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Chinese Physics Letters 2012年第1期29卷 227-230页

作者： SUN Hong-Guo ZHOU Zhong-Xiang YUAN Cheng-Xun yang wen-long WANG He Department of Physics Harbin Institute of TechnologyHarbin 150001 College of Pharmacy Heilongjiang University of Chinese MedicineHarbin 150040

The crystal surface properties of potassium tantalite niobate,KTa_(0.5)Nb_(0.5)O_(3) (KTN),are studied with firstprinciples calculation based on the density functional theory (DFT).Generalized gradient approximation (GGA) functional analysis is also employed by using CASTEP *** explanations for the differences of the ferroelectric and piezoelectric properties between the bulk and surface of the material are *** DFT with GGA is used to determine the structure and to calculate the electronic and optical properties of the chemically ordered KTa_(0.5)Nb_(0.5)O_(3) crystal (100),(110) and (111) *** results show that the surface properties are different from the bulk *** data obtained agree with the expected values and can serve as guidance for future experimental studies in the fields of photorefraction and nonlinear optics.

关键词： properties. crystal piezoelectric

Novel Receptor for the Rapid Reaction and Colorimetric Detection of HSO3- in Aqueous Solutions

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Chemical Research in Chinese Universities 2013年第2期29卷 236-238页

作者： yang wen-long LI Qiao WEI Tai-bao ZHANG You-ming LIN Qi SHI Bing-bing ZHANG Peng Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education of China" Key Laboratory ofPolymer Materials of Gansu Province College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 P. R. China

A novel high-yield Schiff base was designed and synthesized as an anion receptor that specifically select HSO3 anions in aqueous solutions of H20/DMSO（15：85, volume ratio）, which can be detected via colorimetry under direct visualization. The sensor exhibited different results for other anions, such as F, CI, Br, I-, H2PO4-, AcO-, HSO4 and C104. The changes in the UV-Vis spectra also show the specific recognition of HSO3 , rather than similar anions H2PO4- and HSO4- in the same aqueous solution. The detection limit of HSO3- was 1×10-6 mol/L.

关键词： Bisulfite anion sensor 2-Aminobenzimidazole Aqueous solution Single recognition Colorimetry

Improvement on Mixograph test through water addition and parameter conversions

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Journal of Integrative Agriculture 2015年第9期14卷 1715-1722页

作者： SUN Jia-zhu yang wen-long LIU Dong-cheng ZHAO Jun-tao LUO Guang-bin LI Xin LIU Yan-jun GU O Jin-kao ZHANG Ai-min State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of Sciences Zhaoxian Institute of Agricultural Sciences Shijiazhuang Academy of Agriculture and Forestry Sciences

To improve Mixograph testing effect, Farinograph measurements were adopted as a quality standard and changes in water absorption and parameter conversion in Mixograph test were explored. Comparative study showed that increasing water absorption to about 73% and converting original parameters to compound parameters in Mixograph tests signiifcantly increased their predictive power for lfour quality. These efforts also enabled the adoption of ifxed water addition level in Mixograph test and simpliifed the test procedure signiifcantly. With the success in parameter conversions, Mixograph test results were successful y described by Farinograph parameters, which al ow breeders to compare and exchange test results easily. Al these changes optimized the ofifcial method of Mixograph test with simpliifed procedure and enhanced reliability and made the Mixograph being the superior tool for quality assessment in wheat-breeding programs.

关键词： Mixograph water absorption compound parameter constant water addition parameter conversion

A Simplified Algorithm of PLS Regression

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Systems Science and Systems Engineering 2000年第4期10卷 414-419页

作者： ZHU Yun\|hua,\ WANG Hui\|wen,\ yang Xiang\|long School of Management, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

This paper describes a simplified algorithm of PLS regression, which can obviously reduce the computation of some parameters and simplify the computing procedure. Moreover, the new optimistic rule of this method provi... 详细信息

关键词： PLS regression simplified algorithm

Lenalidomide regulates the CCL21/CCR7/ERK1/2 axis to inhibit migration and proliferation in diffuse large B-cell lymphoma

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Oncology Research 2025年第1期33卷 199-212页

作者： wen yang BIN TANG DAN XU wenXIU yang Department of Pathology Guizhou Medical UniversityThe Affiliated Hospital of Guizhou Medical UniversityGuiyang550004China

Background:The prognostic significance of the chemokine receptor CCR7 in diffuse large B-cell lymphoma(DLBCL)has been reported ***,the detailed mechanisms of CCR7 in DLBCL,particularly regarding its interaction with lenalidomide treatment,are not fully ***:Our study utilized bioinformatics approaches to identify hub genes in SU-DHL-2 cell lines treated with lenalidomide compared to control *** data and clinical information from 122 patients with DLBCL were analyzed to assess the correlation of CCR7 and p-ERK1/2 expression with the prognosis of ***,in vitro and in vivo experiments were conducted to clarify the role of CCR7 in the response of DLBCL to lenalidomide ***:Our bioinformatics analysis pinpointed CCR7 as a hub gene in the context of lenalidomide treatment in ***,31.14%and 36.0%(44/122)of DLBCL cases showed positive expression for CCR7 and ERK1/2 respectively,establishing them as independent prognostic factors for adverse outcomes in DLBCL via multivariate Cox regression ***,our studies demonstrated that the external application of the protein CCL21 promoted proliferation,migration,invasion,and activation of the ERK1/2 pathway in SU-DHL-2 and OCI-LY3 cell lines with high levels of CCR7 *** effect was mitigated by CCR7 silencing through siRNA,application of ERK inhibitors,or lenalidomide *** vivo experiments reinforced the efficacy of lenalidomide,significantly reducing tumor growth rate,tumor mass,serum total LDH levels,and expression of CCR7 and p-ERK1/2 in a SUDHL-2 xenograft model in nude mice(p<0.05).Conclusion:Our study clarifies the potential role of the CCL21/CCR7/ERK1/2 axis in the therapeutic effects of lenalidomide in DLBCL treatment.

关键词： CCR7 CCL21 ERK1/2 Lenalidomide Diffuse large B-cell lymphoma(DLBCL)

国家统编教材何以赋能铸牢中华民族共同体意识——基于国家认同的结构——过程视角

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北方民族大学学报（哲学社会科学版） 2024年第4期 167-176页

作者：杨龙文南开大学周恩来政府管理学院天津300350

国家统编教材作为优良载体,对铸牢中华民族共同体意识具有国家认同赋能价值。国家统编教材属于国家认同的具象化表征,国家认同又是铸牢中华民族共同体意识的核心要点。以国家认同理论作为解释性框架,在结构组成机制层面,国家统编教材既... 详细信息

国家统编教材作为优良载体,对铸牢中华民族共同体意识具有国家认同赋能价值。国家统编教材属于国家认同的具象化表征,国家认同又是铸牢中华民族共同体意识的核心要点。以国家认同理论作为解释性框架,在结构组成机制层面,国家统编教材既是国家通用语言文字的承载形式,也是国家认同基本观念的内容实体;在过程传导机制层面,国家统编教材的编写过程是国家事权的彰显,使用过程则体现了国家意志的下沉。当前,要发挥好国家统编教材的认同性结构功能,不断推进其政治社会化过程,在持续增进各族群众国家认同中铸牢中华民族共同体意识。

关键词：铸牢中华民族共同体意识国家统编教材国家认同结构—过程