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机械工程测试技术课程中的MatLab辅助教学

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中国现代教育装备 2019年第3期 35-37页

作者：李云雷许同乐王建军杨小辉山东理工大学机械工程学院山东淄博255000

针对机械工程测试技术课程学时少、内容多且抽象难于理解的特点,运用MatLab软件对课程中的重点、难点内容进行仿真分析和演示。课堂教学实践表明,MatLab辅助教学有利于将抽象理论具体化,从而激发学生学习兴趣,提高课堂学习效率,同时培... 详细信息

针对机械工程测试技术课程学时少、内容多且抽象难于理解的特点,运用MatLab软件对课程中的重点、难点内容进行仿真分析和演示。课堂教学实践表明,MatLab辅助教学有利于将抽象理论具体化,从而激发学生学习兴趣,提高课堂学习效率,同时培养自主创新能力。

关键词：机械工程测试技术 MatLab 仿真分析辅助教学

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鸡弱精症相关精浆蛋白组分析

畜牧兽医学报 2021年第3期52卷 693-702页

作者：魏岳李云雷孙研研武艳平唐维国陈继兰谢金防江西农业科学院畜牧兽医研究所南昌330200 中国农业科学院北京畜牧兽医研究所农业农村部动物遗传育种与繁殖(家禽)重点实验室北京100193

旨在对鸡精浆蛋白组进行分析,筛选与弱精症相关的蛋白。本试验选择同批次孵化的宁都黄鸡公鸡进行精液品质检测,每隔3 d进行1次镜检,共进行3次。选择前向精子比例80%,且直线前向精子比例>40%的个体为对照样本,每组各4只。利用液相色谱-质... 详细信息

旨在对鸡精浆蛋白组进行分析,筛选与弱精症相关的蛋白。本试验选择同批次孵化的宁都黄鸡公鸡进行精液品质检测,每隔3 d进行1次镜检,共进行3次。选择前向精子比例80%,且直线前向精子比例>40%的个体为对照样本,每组各4只。利用液相色谱-质谱(LC-MS/MS)技术开展鸡精浆蛋白组学的研究,筛选与弱精症相关的差异蛋白。结果显示,宁都黄鸡弱精组的精子活力和密度极显著低于对照组(P<0.01)。两组间共筛选到差异表达蛋白78个,5个差异蛋白在弱精组中表现为上调,其余差异蛋白表现为下调。角蛋白9(KRT 9)和硒蛋白P-2(SEPP 2)仅在弱精组中检测到表达;4-羟基-2-氧戊二酸醛缩酶(HOGA 1)、苯丙氨酸羟化酶(PAH)和卵磷脂胆固醇酰基转移酶(LCAT)仅在对照组中检测到表达。经GO注释和KEGG通路分析,差异蛋白功能集中于新陈代谢、糖酵解、碳代谢和氨基酸合成等生物途径。本研究筛选的宁都黄鸡弱精症和正常公鸡精浆差异表达蛋白可作为今后鸡弱精症筛查和治疗的候选靶点,通过进一步功能分析与验证为阐明弱精症的发病机理提供依据。

关键词：鸡弱精症液相色谱-质谱技术差异表达蛋白

High levels of genetic diversity and an absence of genetic structure among breeding populations of the endangered Rufous-backed Bunting in Inner Mongolia,China:implications for conservation

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Avian Research 2021年第1期12卷 52-62页

作者： Shi li Dan li lishi Zhang Weiping Shang Bo Qin yunlei Jiang College of Animal Science and Technology Jilin Agricultural University

Background:The Rufous-backed Bunting,Emberiza jankowskii,is an endangered species that is primarily distributed in Inner Mongolia,*** main threats to the continued persistence of this species are habitat loss and ***,the impact of population loss on genetic diversity remains *** support future conservation and management efforts,we assessed the genetic diversity and population structure of *** using mitochondrial DNA and ***:Blood samples were collected from 7-8-day-old nestlings in Inner Mongolia,China between May and August of 2012 and *** DNA sequences and microsatellite markers were used to assess the genetic diversity,genetic structure and inbreeding of *** results of genetic diversity and inbreeding were compared to other avian ***:We found an unexpectedly high level of genetic diversity in terms of mitochondrial DNA and microsatellite compared to other avian ***,there were high levels of gene flow and minimal genetic structuring,among the fragmented breeding populations of *** in Inner *** findings suggest that *** in Inner Mongolia is a *** the high genetic diversity of ***,local populations in each small patch remain at risk of extinction due to habitat *** addition,the *** population has a high risk of ***:To minimize further loss of genetic diversity of this endangered species,we suggest that the *** in Inner Mongolia should be considered as a protected species for management *** efforts should concentrate on *** habitat *** may be most effectively achieved by protecting the current breeding habitats and prohibiting over-grazing.

关键词： Conservation Emberiza jankowskii Genetic diversity Genetic structure Habitat fragmentation

Colocated MIMO radar waveform design for angular statistical resolution limit in the context of hypothesis testing

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Science China(Information Sciences) 2019年第4期62卷 47-49页

作者： yunlei ZHANG li WANG Jinbo WANG Jun TANG Department of Electronic Engineering Tsinghua University Institute of Electronic Engineering Navy University of Engineering

Dear editor,In this study, we designed collocated multipleinput multiple-out(MIMO) radar waveforms to maximize the resolution performance of angular statistical resolution limit(SRL). The SRL is an emerging definition... 详细信息

关键词： Colocated MIMO radar waveform design for angular statistical resolution limit in the context of hypothesis testing

复合舒芬太尼时甲苯磺酸瑞马唑仑用于儿童意识消失的药效学

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中华麻醉学杂志 2024年第1期44卷 63-65页

作者：王少超王磊王超赵文昝云雷李全德林晓莉山东大学附属儿童医院(济南市儿童医院)麻醉科济南250022 山东大学附属儿童医院(济南市儿童医院)呼吸介入科济南250022 山东大学附属儿童医院(济南市儿童医院)泌尿外科济南250022

目的评价复合舒芬太尼时甲苯磺酸瑞马唑仑用于儿童意识消失的药效学。方法拟行电子支气管镜检查术患儿,性别不限,年龄3~6岁,ASA分级Ⅰ或Ⅱ级。所有患儿入室后心电监护,缓慢静脉注射舒芬太尼0.1μg/kg,3 min后静脉注射甲苯磺酸瑞马唑仑... 详细信息

目的评价复合舒芬太尼时甲苯磺酸瑞马唑仑用于儿童意识消失的药效学。方法拟行电子支气管镜检查术患儿,性别不限,年龄3~6岁,ASA分级Ⅰ或Ⅱ级。所有患儿入室后心电监护,缓慢静脉注射舒芬太尼0.1μg/kg,3 min后静脉注射甲苯磺酸瑞马唑仑。采用Dixon改良序贯法进行试验,甲苯磺酸瑞马唑仑初始剂量为0.30 mg/kg,根据意识是否消失确定下一例患儿甲苯磺酸瑞马唑仑的剂量,相邻剂量梯度为0.05 mg/kg,意识消失标准:甲苯磺酸瑞马唑仑注射完毕1 min后睫毛反射消失且改良警觉/镇静评分达到0分,直至出现8个意识未消失-意识消失的交叉点。采用probit法计算甲苯磺酸瑞马唑仑使儿童意识消失的半数有效剂量(ED50)、95%有效剂量(ED95)及其95%可信区间(95%CI)。结果复合舒芬太尼时甲苯磺酸瑞马唑仑使儿童意识消失的ED50及其95%CI为0.461(0.429~0.493)mg/kg,ED95及其95%CI为0.515(0.487~0.689)mg/kg。结论复合舒芬太尼时甲苯磺酸瑞马唑仑使儿童意识消失的ED50为0.461 mg/kg,ED95为0.515 mg/kg。

关键词：苯二氮类舒芬太尼儿童剂量效应关系药物

The influence of solute atom ordering on the deformation behavior of hexagonal close packed Ti-Al alloys

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Journal of Materials Science & Technology 2020年第17期52卷 235-242页

作者： Hao Wu yunlei Xu Zhihao Wang Zhenhua liu Qinggang li Jinkai li Junyan Wu School of Materials Science and Engineering University of JinanJinan 250022China School of Material Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Technical Division Sinomach Foundry and Metal Forming Co.Ltd.Jinan 250306China Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials Jinan 250022China

A framework of compositionally graded Ti-Al alloys was proposed to elucidate the Al alloying dependent deformation mechanism at room *** trace analysis demonstrated low-alloyed Ti-Al model materials were plastically deformed by prismatic slip,pyramidal slip,stacking faults,and deformation *** Al concentration promoted chemical ordering,thus suppressing the dislocation motion and deformation *** mechanism behind such a kind of composition-mediated deformation physics was *** findings are expected to be applicable in the design of next-generation high-performance structural materials through the tailoring of the chemical ordering of solute atoms in substitutional solid solution.

关键词： Titanium alloys Diffusion Alloying Electron microscopy

基于环境DNA宏条形码的辽东半岛重要河口鱼类多样性特征

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大连海洋大学学报 2024年第4期39卷 578-588页

作者：崔晓玉张云雷张金勇孙艺王媛李宏俊大连海洋大学水产与生命学院辽宁大连116023 国家海洋环境监测中心国家环境保护近岸海域生态环境重点实验室辽宁大连116023

为了从分子技术水平探讨渤海与北黄海重要河口鱼类构成及多样性分布情况,利用环境DNA宏条形码技术对渤海与北黄海的12个重要河口进行了鱼类群落多样性研究。结果表明:渤海海域共检测出鱼类74种,隶属于2纲19目41科57属,其中,鲈形目(45%)... 详细信息

为了从分子技术水平探讨渤海与北黄海重要河口鱼类构成及多样性分布情况,利用环境DNA宏条形码技术对渤海与北黄海的12个重要河口进行了鱼类群落多样性研究。结果表明:渤海海域共检测出鱼类74种,隶属于2纲19目41科57属,其中,鲈形目(45%)占比最大,北黄海共检测出鱼类76种,隶属于2纲19目42科59属,其中鲈形目(42%)占比最大;渤海与北黄海鱼类多样性指数变化趋势相似,但渤海的多样性指数低于北黄海,表明北黄海具有较丰富的鱼类多样性;基于Bray-Curtis距离的NMDS分析和ANOSIM检验显示,渤海与北黄海鱼类群落组间差异大于组内差异(P=0.001);相比于传统鱼类多样性调查方法,环境DNA宏条形码调查在灵敏性、非破坏性和成本效益方面具有显著优势,适用于鱼类多样性调查。研究表明,北黄海相较于渤海具有更高的鱼类多样性;环境DNA宏条形码技术适用于鱼类多样性调查,可对渔业资源调查结果进行补充,在鱼类多样性调查中具备大范围业务化应用前景。

关键词：环境DNA宏条形码渤海北黄海鱼类多样性辽东半岛河口

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Facile synthesis of metal-organic frameworks embedded in interconnected macroporous polymer as a dual acid-base bifunctional catalyst for efficient conversion of cellulose to 5-hydroxymethylfurfural

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Chinese Journal of Chemical Engineering 2022年第4期35卷 169-181页

作者： Yanan Wei yunlei Zhang Bing li Wen Guan Changhao Yan Xin li Yongsheng Yan Institute of Green Chemistry and Chemical Technology School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212000China Research Center of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang 212000China

5-Hydroxymethylfurfural(5-HMF),as a key platform compound for the conversion of biomass to various biomass-derived chemicals and biofuels,has been attracted extensive *** this research,using Pickering high internal phase emulsions(Pickering HIPEs)as template and functional metal-organic frameworks(MOFs,UiO-66-SO;H and UiO-66-NH;)/Tween 85 as co-stabilizers to synthesis the dual acid-base bifunctional macroporous polymer catalyst by one-pot process,which has excellent catalytic activity in the cascade reaction of converting cellulose to *** effects of the emulsion parameters including the amount of surfactant(ranging from 0.5%to 2.0%(mass)),the internal phase volume fraction(ranging from 75%to 90%)and the acid/base Pickering particles mass ratio(ranging from 0:6 to 6:0)on the morphology and catalytic performance of solid catalyst were systematically *** results of catalytic experiments suggested that the connected large pore size of catalyst can effectively improve the cellulose conversion,and the synergistic effect of acid and base active sites can effectively improve the 5-HMF *** highest 5-HMF yield,about 40.5%,can be obtained by using polymer/MOFs composite as catalyst(Poly-P12,the pore size of(53.3±11.3)μm,the acid density of 1.99 mmol·g^(-1)and the base density of 1.13 mol·g^(-1))under the optimal reaction conditions(130℃,3 h).Herein,the polymer/MOFs composite with open-cell structure was prepared by the Pickering HIPEs templating method,which provided a favorable experimental basis and theoretical reference for achieving efficient production of high addedvalue product from abundant biomass.

关键词： Catalyst Biomass Hydrolysis 5-Hydroxymethylfurfural Pickering high internal phase emulsions templated polymer Acid-base bifunctional site

Molecular evidence of introgressive hybridization between related species Jankowski's Bunting(Emberiza jankowskii)and Meadow Bunting(Emberiza cioides)(Aves:Passeriformes)

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Avian Research 2022年第2期13卷 127-136页

作者： Long Huang lishi Zhang Dan li Rongfei Yan Weiping Shang yunlei Jiang Shi li School of life Sciences Jilin Agricultural UniversityChangchun130118China School of Animal Science&Technology Jilin Agricultural UniversityChangchun130118China

Natural hybridization,which often occurs between closely related species exhibiting sympatric or parapatric distributions,is an important source of genetic variation within *** closely related Jankowski’s Bunting(Emberiza jankowskii)and Meadow Bunting(***)are similar in morphology and genetics,occupy overlapping niches,and are sympatric in eastern Inner *** studies have reported trans-species polymorphisms of alleles between the two species,as well as an unexpectedly high genetic diversity of the endangered *** speculate that introgressive hybridization has occurred between the two species and contributed to the additional unexpected variation to *** used mitochondrial NADH dehydrogenase subunit 2(ND2)gene and 15 nuclear microsatellite markers to compare the genetic diversity of *** and ***,and inferred the origin of trans-species polymorphisms between the two species by phylogenetic reconstruction and Bayesian cluster *** two species could be clearly distinguished by population cluster *** the large number of mutational differences,we still detected sharing of major haplotypes and the presence of hybrids between the two *** study confirmed that weak introgressive hybridization has occurred between sympatric *** and ***,which may be mediated by female *** individuals,and that interspecific introgression has contributed to the maintenance of high genetic diversity in *** being wary of the potential negative effects of introgressive hybridization,we suggest that expanding the habitat of *** remains the most effective conservation strategy at present.

关键词： Conservation strategy Demographic shrinkage Emberiza jankowskii High genetic diversity Introgressive hybridization Related species Sympatric