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机电产品开发与创新 2024年第1期37卷 93-96页

作者：赵鹏飞国能朔黄铁路机辆分公司河北沧州062350

朔黄铁路将某区间的三显示自动闭塞方式升级为四显示自动闭塞方式,为探究四显示闭塞方式对2万吨重载列车操纵的影响,本文针对现有列车操纵办法展开研究,并使用专业的重载列车动力学仿真软件进行模拟仿真试验,为2万吨重载列车的操纵优化... 详细信息

朔黄铁路将某区间的三显示自动闭塞方式升级为四显示自动闭塞方式,为探究四显示闭塞方式对2万吨重载列车操纵的影响,本文针对现有列车操纵办法展开研究,并使用专业的重载列车动力学仿真软件进行模拟仿真试验,为2万吨重载列车的操纵优化提供重要参考。

关键词：四显示自动闭塞重载列车模拟仿真操纵优化

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数学文化对数学教育的启示与借鉴

哈尔滨学院学报 2024年第1期45卷 139-141页

作者：赵鹏飞高忠坡哈尔滨学院黑龙江哈尔滨150086

数学文化包括数学知识、历史、思想和方法等,它可以激发学生兴趣和好奇心,提高学生的思维能力和解决问题的创造性。加强数学文化的教育和研究,将其融入数学教育中,可以丰富教学内容,实现个性化和多元化的教学方式和手段。文章主要探讨... 详细信息

数学文化包括数学知识、历史、思想和方法等,它可以激发学生兴趣和好奇心,提高学生的思维能力和解决问题的创造性。加强数学文化的教育和研究,将其融入数学教育中,可以丰富教学内容,实现个性化和多元化的教学方式和手段。文章主要探讨如何将数学文化融入数学教育中,促进学生对数学的理解和学习兴趣的培养。

关键词：数学文化教育

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机场终端区晴好天气容量评估方法的初步研究

航空计算技术 2024年第3期54卷 58-63页

作者：赵鹏飞段炼赵志韦升杜世杰钱菲中国民用航空飞行学院四川广汉618000

在我国航空运输需求迅速增长,运营压力激增的背景下,采用适当的容量评估模型对于繁忙机场的理论容量研究和机场运行规划具有重要意义。以最大流最小割定理为基础,建立了进离场航段容量模型和交叉点容量模型,并选择西安咸阳机场进行仿真... 详细信息

在我国航空运输需求迅速增长,运营压力激增的背景下,采用适当的容量评估模型对于繁忙机场的理论容量研究和机场运行规划具有重要意义。以最大流最小割定理为基础,建立了进离场航段容量模型和交叉点容量模型,并选择西安咸阳机场进行仿真验证。研究结果表明,该模型能够高度准确地预测机场容量,其预测结果接近实际运行最大小时流量的105%~110%。表明该模型在终端区容量评估方面具有出色的精确性,特别适用于晴朗天气条件下的情况。这一研究为机场管理者提供了强大的决策工具,有助于更有效地满足不断增长的航空交通需求,确保机场运行的高效性和安全性。

关键词：终端区容量评估最大流最小割交叉点进离场容量

组合纳滤在煤化工废水分盐改造中的工程应用研究

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现代化工 2024年第7期44卷 225-228页

作者：赵鹏飞张彦海李超张波俞彬博天环境集团股份有限公司北京100082 榆林市博华水务有限公司陕西榆林719099

为实现结晶盐资源化,对某煤化工零排放项目采用组合纳滤技术+重结晶工艺进行改造。结果表明,组合纳滤可有效实现分盐及浓缩功能,当进水中Cl-/SO_(4)^(2-)=0.37~0.98时,组合纳滤产水Cl-/SO_(4)^(2-)=30.7~298.5(均值117.9),浓水中Cl-/SO_... 详细信息

为实现结晶盐资源化,对某煤化工零排放项目采用组合纳滤技术+重结晶工艺进行改造。结果表明,组合纳滤可有效实现分盐及浓缩功能,当进水中Cl-/SO_(4)^(2-)=0.37~0.98时,组合纳滤产水Cl-/SO_(4)^(2-)=30.7~298.5(均值117.9),浓水中Cl-/SO_(4)^(2-)=0.09~0.28(均值0.15),浓水中SO_(4)^(2-)浓度可达80 000 mg/L以上,截留率>99%,Cl-平均截留率为-18.9%;产出合格NaCl及Na2SO4结晶盐,纯度均在98.5%以上,有效地实现了混盐资源化。

关键词：组合纳滤煤化工混盐分盐资源化

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冻融循环对长春典型土层深基坑开挖变形及稳定性影响分析

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建材技术与应用 2024年第1期 26-31页

作者：任文峰赵鹏飞黄勤唐晓林中铁七局集团第二工程有限公司辽宁沈阳110005 华东交通大学土木建筑学院江西南昌330013

为了探究冻融循环作用对长春典型粉质黏土为主的土层下深基坑开挖的变形及稳定性影响,以吉林大学第一医院地下停车场工程为研究对象,通过有限元软件Plaxis2d进行数值模拟,对适用于长春典型土层受一次冻融循环影响下的土体工程相关参数... 详细信息

为了探究冻融循环作用对长春典型粉质黏土为主的土层下深基坑开挖的变形及稳定性影响,以吉林大学第一医院地下停车场工程为研究对象,通过有限元软件Plaxis2d进行数值模拟,对适用于长春典型土层受一次冻融循环影响下的土体工程相关参数折减系数进行甄选,确定对基坑变形影响最大的三个参数土体粘聚力c、内摩擦角φ和弹性模量E分别进行0.99、0.98和0.96的系数折减能有效地反映其受一次冻融循环下地变形特性,与实测值作比较误差较小。在此基础上分析三者对桩锚式基坑变形的影响程度,发现受冻融影响下的土体参数改变后对基坑支护变形影响最大的是内摩擦角φ,下降10%时基坑桩身水平位移增大27%;其次是弹性模量E下降10%时桩身水平位移增大21%;而粘聚力c对基坑变形影响较小。

关键词：深基坑开挖数值模拟桩锚支护冻融循环

互叶白千层及其混交林主要害虫群落多样性及发生动态

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西南农业学报 2024年第7期37卷 1545-1552页

作者：赵鹏飞余玉珠李艳枝郭萍花育宁吴香丽常明山广西壮族自治区林业科学研究院广西林业有害生物天敌繁育工程技术研究中心南宁530002 广西国有钦廉林场广西钦州535099

[目的]明确广西互叶白千层(Melaleuca leucadendron)纯林及其与桉树(Eucalyptus)和罗汉松(Podocarpus macrophyllus)混交林的主要害虫群落多样性、分布情况和发生动态,为互叶白千层种植及绿色防控提供依据。[方法]于2023年调查广西钦州... 详细信息

[目的]明确广西互叶白千层(Melaleuca leucadendron)纯林及其与桉树(Eucalyptus)和罗汉松(Podocarpus macrophyllus)混交林的主要害虫群落多样性、分布情况和发生动态,为互叶白千层种植及绿色防控提供依据。[方法]于2023年调查广西钦州的互叶白千层种植区,以路线踏查和标准地调查为主,定点监测、定期调查和室内饲养观察为辅,对广西互叶白千层及其混交林的主要害虫种类、多样性及发生动态进行研究。[结果]广西互叶白千层主要害虫种类有22科28种,分别隶属于半翅目、鳞翅目、鞘翅目、直翅目、革翅目、缨翅目,其中以鳞翅目和半翅目害虫数量最多。互叶白千层×桉树混交林发现害虫数量较多,对叶片为害较为严重的有眼纹广翅蜡蝉(Euricania ocellus)、桉重尾夜蛾(Bombotelia sp.)、桉小卷叶蛾(Strepsicrates coriariae)、小用克尺蛾(Jankowskia fuscaria)和桃粉蚜(Hyalopterus arundimis),桉重尾夜蛾在3种林分中的为害最严重,互叶白千层×罗汉松混交林发现害虫种类最多,纯林的害虫多样性在三者中最低;2种混交林分中互叶白千层×罗汉松混交林的虫害发生动态更稳定,受害程度更小。不同林分类型林间害虫的多度指数和Chao1指数均有差异,互叶白千层×桉树混交林的害虫多度指数和Chao1指数高于另外2种林分。不同林分的桉重尾夜蛾和桉小卷叶蛾的发生动态均有差异,互叶白千层×桉树混交林中的桉重尾夜蛾最早爆发,纯林中桉小卷叶蛾较早爆发。[结论]互叶白千层不同林分混交有助于改善林间虫害发生和多样性,3种林分中互叶白千层×罗汉松混交林可减少主要虫害发生。

关键词：互叶白千层害虫种类分布

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Well-dispersed Sb particles embedded on N-doped carbon nanofibers toward high-performance Li-ion battery

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Rare Metals 2024年第7期43卷 2994-3006页

作者： Ying Li Yi-Han zhao Lu-Lu zhao peng-fei Wang Ying Xie Ting-Feng Yi School of Materials Science and Engineering Northeastern University Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at Qinhuangdao Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang University

The alloy-type material Sb is widely used in the anode materials of lithium-ion batteries（LIBs） due to its high theoretical specific ***,its serious volume expansion problem during alloying/dealloying of Li+limits its practical *** this work,C-Sb composite was constructed as anode material of LIBs by electrospinning route for the first time,Sb was introduced into the polyacrylonitrile-based hard carbon and coal tar pitch-based soft carbon composite amorphous carbon fiber with a diameter of 300-600 nm,which realized high cycling *** C-Sb-2（the mass ratio of polyacrylonitrile to Sb source is 1:2） electrode displayed charge capacities of 1098.5,930.3,841.7,753.5,643.9 and 545.8 mAh·g-1at 0.1,0.2,0.3,0.5,1 and 2 A·g-1,*** when the current density returned to 0.1 A·g-1,the charge capacity was 939.3 mAh·g-1,revealing good stability and *** introduction of Sb into the amorphous carbon improved its conductivity and addressed the volume expansion issue of high specific capacity Sb during charge/***-situ XRD analysis confirmed the high reversibility of the C-Sb-2 during charging and *** functional theory（DFT） calculations revealed the gradual enhancement of the interface interaction between SbxLiyand amorphous carbon（AMC） with increasing lithium content,contributing to the anchoring of alloy nanoparticles on the AMC surface and buffering the volume change of the ***,the gradual lithiation of Sb facilitated the electron transfer from SbxLiyto *** findings hold promise for designing lithium storage materials with exceptional performance,highlighting the potential of C-Sb composites as anode materials for efficient next-generation lithium storage.

关键词： Li-ion battery Metallic Sb Carbon Electrospinning Cycling stability

Highly selective and eco-friendly dihydroisoquinoline synthesis via Cu/Co synergistic catalysis in Cu NPs@MOFs catalyst under mild conditions

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Science China Chemistry 2024年第5期67卷 1561-1568页

作者： peng-fei Guo Ze-Long Liang Yue-E Jiao Hang Xu Bin zhao Key Laboratory of Advanced Energy Material Chemistry Renewable Energy Conversion and Storage CenterDepartment of ChemistryNankai UniversityTianjin 300071China

3,4-Dihydroisoquinoline(DHIQ)is an important precursor used in the production of drugs for treating cancer,HIV,Alzheimer's disease,*** studies on DHIQ synthesis show low catalytic selectivity due to the susceptible over-oxidation feedstock of1,2,3,4-tetrahydroisoquinoline(THIQ),which often requires alkali ***,it is desirable yet challenging to explore a highly selective and efficient oxydehydrogenation capacity for DHIQ synthesis under eco-friendly reaction ***,a novel framework 1 was synthesized,exhibiting 1D channels with the size of 4.6 A×9.6 A and high solvent/p H/thermal stability.A stable framework allows it to encapsulate Cu nanoparticles(NPs)to form Cu NPs@1-x(x=1,2,3,and 4)with varying loading amounts of Cu NPs at 2.0 wt%,3.0 wt%,4.0 wt%,and 6.0 wt%,*** NPs@1-3 could selectively catalyze the reaction from THIQ to DHIQ with a high selectivity of 98%and a recorded turnover frequency(TOF)of 22.1 h-1under eco-friendly mild *** corresponding catalytic activity can maintain at least five recyclings and can be further applied to gram-scale ***,the efficient preparation of DHIQ catalyzed by Cu NPs@1-3 could be realized even under air ***,the anticancer molecule precursor synthesis of 6,7-dimethoxy-3,4-dihydroisoquinoline was also selectively catalyzed by Cu NPs@*** investigations revealed that high catalytic performance can be attributed to the stable framework and the synergistic catalytic effect of the loaded Cu NPs and Co metal *** importantly,this work represents the first example of MOF catalysts for selectively thermo-catalytic DHIQ synthesis and demonstrates a simple approach to obtain efficient catalysts for selective oxydehydrogenation in the production of unsaturated compounds.

关键词： metal-organic frameworks Cu NPs@MOFs 3 4-dihydroisoquinoline selective oxydehydrogenation synergistic catalysis

Cation-Dipole Interaction-Induced Coacervate Underwater Adhesives in Natural Seawater

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Chinese Journal of Polymer Science 2024年第7期42卷 984-991,I0009页

作者： Xu-fei Liu Chong-Rui Zhang Hua-Wen peng Qiang zhao Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China

Significant progress has been made in wet adhesives for low salinity water,but exploration of general ionic adhesives for natural seawater is less developed because the high salinity could weaken interfacial bonding and shields electrostatic interactions,resulting in adhesion ***,the design of adhesives for natural seawater represents challenges less ***,a cationic polyelectrolyte(PECHIA)containing imidazolacetonitrile unit was explored to prepare adhesives enabled by natural *** combining the ion shielding effect with the“cation-dipole”interactions between PECHIA chains,aqueous solution of the PECHIA underwent coacervation and self-crosslinking in natural seawater,allowing for underwater adhesion to various substrates in *** instantaneous lap-shear and tensile adhesion strengths are 47 and 119 kPa,respectively,while the cured adhesive shows~739 k Pa tensile adhesion in natural *** design of PECHIA enables wet adhesives viable for applications in the diversified scenarios of natural seawater.

关键词： Coacervate Underwater adhesives Seawater Cation-dipole interaction

Anomalous bond lengthening in compressed magnetic doped semiconductor Ba(Zn_(0.95)Mn_(0.05))_(2)As_(2)

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Journal of Semiconductors 2024年第4期45卷 36-41页

作者： fei Sun Yi peng Guoqiang zhao Xiancheng Wang Zheng Deng Changqing Jin Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physics University of Chinese Academy of SciencesBeijing 101408China Center for High Pressure Science and Technology Advanced Research Beijing 100094Chin

Applying pressure has been evidenced as an effective method to control the properties of semiconductors,owing to its capability to modify the band configuration around Fermi ***,structural evolutions under external pres-sures are required to analyze the *** high-pressure structure of a magnetic doped semiconductor Ba(Zn_(0.95)Mn_(0.05))_(2)As_(2)is studied with combination of in-situ synchrotron X-ray diffractions and diamond anvil *** materials become ferromagnetic with Curie temperature of 105 K after further 20%K *** title material undergoes an isostruc-tural phase transition at around 19 *** the transition pressure,it is remarkable to find lengthening of Zn/Mn-As bond within Zn/MnAs layers,since chemical bonds are generally shortened with applying *** with the bond stretch,interlayer As-As distances become shorter and the As-As dimers form after the phase *** further compres-sion,Zn/Mn-As bond becomes shortened due to the recovery of isotropic compression on the Zn/MnAs layers.

关键词： magnetic semiconductor high-pressure in-situ X-ray diffraction phase transition