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Acta Mechanica Solida Sinica 2024年第2期37卷 271-284页

作者： Hanxing Zhao Pengyu Cao fengfeng li Xin Lan liwu liu Yanju liu Jinsong Leng Centre of Composite Materials and Structures Harbin Institute of Technology(HIT)Harbin150080China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)Harbin150001China

The mismatch in thermal expansion coefficients between the fiber-rich and resin-rich regions of a shape memory polymer composite(SMPC)laminate,along with the residual strain during SMPC fabrication,results in buckling deformation of the inhomogeneous laminate.This paper presents a macroscopic model for buckling of an inhomogeneous SMPC laminate under initial biaxial prestrains.Both linear and nonlinear buckling analyses are carried out using the energy method.The influences of prestrain biaxiality,temperature,and ply angle on the buckling wavelength,critical buckling prestrain,and buckling amplitude are calculated.The results demonstrate that the critical buckling wavelength of the SMPC laminate is independent of the prestrain,while the amplitude is almost independent of temperature.In addition,the optimal fiber stacking configuration with the maximum critical buckling prestrains of inhomogeneous SMPC laminates is determined by a genetic algorithm.

关键词： Shape memory polymer composite Buckling behavior Inhomogeneous laminate Biaxial prestrains

Recent advances in nickel-based catalysts in eCO_(2)RR for carbon neutrality

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Carbon Energy 2024年第2期6卷 61-91页

作者： Weikang Peng fengfeng li Shuyi Kong Chenxi Guo Haotian Wu Jiacheng Wang Yi Shen Xianguang Meng Mingxi Zhang Hebei Key Laboratory of Inorganic Nonmetallic Materials School of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanHebeiChina Hebei Iron and Steel Laboratory North China University of Science and TechnologyTangshanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina School of Materials Science and Engineering Taizhou UniversityZhejiangChina

The excessive use of nonrenewable energy has brought about serious greenhouse effect.Converting CO_(2) into high-value-added chemicals is undoubtedly the best choice to solve energy problems.Due to the excellent cost-effectiveness and dramatic catalytic performance,nickel-based catalysts have been considered as the most promising candidates for the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR).In this work,the electrocatalytic reduction mechanism of CO_(2) over Ni-based materials is reviewed.The strategies to improve the eCO_(2)RR performance are emphasized.Moreover,the research on Ni-based materials for syngas generation is briefly summarized.Finally,the prospects of nickel-based materials in the eCO_(2)RR are provided with the hope of improving transition-metal-based electrocatalysts for eCO_(2)RR in the future.

关键词： carbon energy carbon neutrality CO_(2)reduction electrocatalysis nickel-based materials

Transformation mechanism of muddy carbonate rock by the coupling of bioturbation and diagenesis:A case study of the Cretaceous of the Mesopotamia Basin in the Middle East

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Petroleum Exploration and Development 2021年第6期48卷 1367-1382页

作者： YE Yu li fengfeng SONG Xinmin GUO Rui Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China CNPC Engineering Technology R&D Company limited Beijing 102206China

The transformation mechanism of muddy carbonate rock by the coupling of bioturbation and diagenesis was stud-ied based on core,cast thin section and physical property data of Cretaceous strata in the Mesopotamia Basin,the Middle East.There are 3 ways of biological transformation of rocks:(1)The living creatures transformed formations mechanically to make the rocks looser and intergranular pores increase.(2)After formation,burrows were backfilled with coarse-grained debris,and then unsaturated fluid infiltrated into the burrows during the penecontemporaneous period,resulting in dissolution.(3)Chemical alteration occurred in abandoned burrows and dolomitization produced a large number of intercrystalline pores.The·coupling of bioturbation and dissolution occurred mainly in the penecontemporaneous phase,and was controlled by rock type,sea level decline,burrow abundance,infillings,and water environment etc.As the burrows had better physical properties than the matrix,unsaturated fluid preferentially migrated along the burrows,leading to dissolution and expansion of the burrows first and then dissolution of the matrix.The coupling of bioturbation and dolomitization occurred mainly in the burial phase.The rich organic matter and reducing bacteria in the burrow provided material basis,reducing conditions and alkaline envi-ronment for dolomitization.The metasomatism in the penecontemporaneous period had little effect on the physical properties of the burrows.When the burrows were se parated from the deposition interface,equimolar metasomatism occurred in the burrows in a closed environment,forming euhedral fine-crystalline dolomite with intercrystalline pores.The transformation degree of bioturbation to muddy carbonate reservoir depends on rock type,density,connectivity,infillings and structure of the burrows.With the increase of the carbonate mud content,the im provement to rock physical properties by bioturbation be-comes more prominent.When the burrows are filled with coarse-grained debris or fine-crystalline dolomite

关键词： bioturbation muddy carbonate rocks Mesopotamia Basin Cretaceous diagenesis dissolution dolomitization

Sol-gel preparation and phosphorescence property of Mn^(2+)-doped zinc boro-silicate glass thin films

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Rare Metals 2011年第3期30卷 298-303页

作者： li fengfeng ZHANG Mingxi HOU Guiqin SHEN Yi liU Zhigang li Hongsheng College of light Industry Hebei Polytechnic University Tangshan 063000 China Key Laboratory for Inorganic Non-metallic Materialogy of Hebei Province College of Materials Science and Engineering Hebei Polytechnic University Tangshan 063009 China

Mn2＋-doped zinc borosilicate （ZBSM） glass thin films were first synthesized by sol-gel method. In the experiment, a thin gel film was depos-ited onto quartz glass substrates by dip-coating method and then heat-treated to form a Mn2＋-doped zinc borosilicate glass thin film. Long lasting phosphorescence （LLP） and photo-stimulated long lasting phosphorescence （PSLLP） were found in the film sample. According to fluorescence spectra, LLP emission spectra, and PSLLP emission spectra, both LLP and PSLLP emissions are attributed to the energy level transition of 4Eg→4A1g from Mn2＋. Both the phosphorescence intensity decay curves contain a fast decay component and another slow decay one. The thermoluminescence （TL） spectra show that the sample has two kinds of traps at least and their energy level values are about 0.8 eV and 1.02 eV, which could be estimated by the Randall and Willcins formula. The infrared absorption spectra （IR） consist of characteristic vi-bration bands of Si-O-Si, Si-O-Zn, B-O in [BO3], B-O group, and Zn-O in [ZnO4]. Moreover, image storage and logical operation of the ZBSM film were carried out successfully through an experiment analogues of optical storage.

关键词： thin films borosilicate glass zinc borosilicate manganese doping sol-gel process phosphorescence

两渡煤业21018回采巷道围岩控制技术研究及应用

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煤 2024年第3期33卷 105-108页

作者：李峰峰山西汾西矿业集团两渡煤业有限责任公司山西晋中032000

针对两渡煤业回采巷道的支护问题,采用理论分析及数值模拟的方法,对21018回采巷道原有支护方案进行了优化设计,优化后的支护方案如下:顶锚杆规格为Φ20 mm×2500 mm,间排距为900 mm×700 mm,顶锚索规格为Φ18.9 mm×8300 mm,间排距为160... 详细信息

针对两渡煤业回采巷道的支护问题,采用理论分析及数值模拟的方法,对21018回采巷道原有支护方案进行了优化设计,优化后的支护方案如下:顶锚杆规格为Φ20 mm×2500 mm,间排距为900 mm×700 mm,顶锚索规格为Φ18.9 mm×8300 mm,间排距为1600 mm×1400 mm,帮锚杆规格为Φ20 mm×2200 mm,间排距为900 mm×700 mm.并在21018回采巷道进行了现场试验,现场监测数据显示,巷道围岩变形量不大,优化后的支护方案可有效约束巷道围岩变形。

关键词：支护参数方案优化巷道变形现场监测

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广播系统视听设备绿色节能技术研究

电声技术 2024年第4期48卷 112-114页

作者：李锋锋衡水广播电视台河北衡水053000

针对广播系统视听设备的能耗问题,分析传统设备面临的能耗挑战,探讨绿色节能技术创新方案。通过引入自适应节能技术、高效能量回收再利用及全面优化的设备生命周期管理方法,旨在提高设备能效,降低能耗,推动广播行业实现可持续发展。这... 详细信息

针对广播系统视听设备的能耗问题,分析传统设备面临的能耗挑战,探讨绿色节能技术创新方案。通过引入自适应节能技术、高效能量回收再利用及全面优化的设备生命周期管理方法,旨在提高设备能效,降低能耗,推动广播行业实现可持续发展。这些创新方案不仅有助于节能减排,还可为相关行业提供借鉴,对应对气候变化和节约资源具有重要意义。

关键词：广播系统绿色节能技术视听设备

中东M油田Mishrif组局限环境储层类型、特征及成因

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沉积学报 2024年第2期42卷 593-607页

作者：李峰峰叶禹郭睿陈沛沛中国石油勘探开发研究院北京100083 中国石油国际勘探开发有限公司北京100034 中国石油学会北京100120

【目的】中东M油田白垩系Mishrif组局限环境储层复杂且对储层非均质性认识不足,制约了该类油藏的有效开发,亟需明确局限环境中储层特征、展布规律及非均质性主控因素。【方法】综合岩心、铸体薄片、物性及压汞实验等数据,根据储层结构... 详细信息

【目的】中东M油田白垩系Mishrif组局限环境储层复杂且对储层非均质性认识不足,制约了该类油藏的有效开发,亟需明确局限环境中储层特征、展布规律及非均质性主控因素。【方法】综合岩心、铸体薄片、物性及压汞实验等数据,根据储层结构组分和地质成因划分储层类型,通过数理统计和连井对比,明确不同储层岩石物理特征,刻画储层空间展布规律,基于层序地层学和沉积学理论,阐明局限环境储层特征主控因素,建立不同储层的发育模式。【结果】Mishrif组局限环境中发育三种类型储层(RT1类、RT2类和RT3类):RT1类储层为高能沉积和准同生溶蚀作用叠加而形成,发育于潮道和台内滩,岩性主要为颗粒灰岩,物性以中高孔、中高渗为主,储集空间以粒间孔和粒间溶孔为主,储层发育规模较大且分布较稳定,是油藏开发首选的目标储层;RT2类储层为低能沉积和准同生溶蚀作用叠加而形成,发育于潟湖环境,岩性包括含粒泥灰岩、粒泥灰岩和泥粒灰岩,物性以中高孔、中低渗为主,原生粒间孔不发育,储集空间以基质微孔、铸模孔和晶间孔为主,储层发育规模最大,但单层厚度薄,夹层发育频率高,开发难度大;RT3类储层为高能沉积和准同生白云石化作用叠加而形成,发育于台内滩,岩性多为白云岩类,物性以中高孔、中低渗为主,储集空间主要为晶间孔,仅在Mishrif组上部局部发育。【结论】RT1类储层主要受沉积作用控制,沉积作用控制了储层的原始结构组分,准同生溶蚀进一步改善了储层物性;RT2类储层沉积水动力较弱,原始物性较差,成岩作用是储层发育的主控因素,孔隙主要形成于大气淡水环境下的选择性溶蚀作用;RT3类储层原始结构组分破坏严重,局部残留的生物碎屑指示其形成于中高能沉积环境,储层形成于准同生白云石化作用。不同类型储层空间上相互叠置,导致局限环境储层具有较强的非均质性。

关键词：局限环境 Mishrif组储层成因沉积作用成岩作用

LN树脂对溶液中钐和钆的静态吸附和色层柱分离

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有色金属（冶炼部分） 2024年第6期 78-84页

作者：葛芮彤李斌李峰峰徐纪塘李俊乐中国原子能科学研究院放射化学研究所北京102413

探究LN树脂对Sm(Ⅲ)和Gd(Ⅲ)的吸附效果,考察了时间、酸度和温度对树脂吸附量的影响,对吸附过程的吸附动力学和吸附热力学进行了研究,并测定了相关热力学参数ΔH、ΔS以及ΔG。结果表明,LN树脂在298 K下对Sm(Ⅲ)和Gd(Ⅲ)的吸附可在2 mi... 详细信息

探究LN树脂对Sm(Ⅲ)和Gd(Ⅲ)的吸附效果,考察了时间、酸度和温度对树脂吸附量的影响,对吸附过程的吸附动力学和吸附热力学进行了研究,并测定了相关热力学参数ΔH、ΔS以及ΔG。结果表明,LN树脂在298 K下对Sm(Ⅲ)和Gd(Ⅲ)的吸附可在2 min后达到平衡,酸度越小平衡吸附量越大,且随温度升高平衡吸附量也逐渐升高。使用LN树脂色层柱进行了钐和钆的分离试验,Sm(Ⅲ)在0.75 mol/L HNO_(3)酸度下洗脱,Gd(Ⅲ)在1.0 mol/L HNO_(3)酸度下洗脱,不同洗脱液流速对柱分离效果的影响结果表明,流速为0.53 mL/min时分离效果最好。

关键词： LN树脂钐钆吸附色层柱

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新时代高校思政课讲好红色故事价值蕴含研究

淮南职业技术学院学报 2024年第1期24卷 7-9页

作者：李凤凤熊香江西财经大学马克思主义学院南昌330013

红色故事承载着革命文化、凝结着革命精神,是高校立德树人、铸魂育人的宝贵资源.在新时代历史方位下,高校思政课讲好红色故事对培养时代新人、改革思政教育、传承红色基因意义深远.应始终遵循培育与践行社会主义核心价值观这一思想主线... 详细信息

红色故事承载着革命文化、凝结着革命精神,是高校立德树人、铸魂育人的宝贵资源.在新时代历史方位下,高校思政课讲好红色故事对培养时代新人、改革思政教育、传承红色基因意义深远.应始终遵循培育与践行社会主义核心价值观这一思想主线,从历史、情感、体验、传播四个维度讲好红色故事,力求以红色故事赋能高校思政课教学,促进当代大学生自觉传承红色基因,将自身塑造成为社会主义事业的后备人才,为实现中国梦想而提供力量源泉.

关键词：新时代高校思政课红色故事

长江中游不同品质类型小麦产量形成及氮素吸收利用对氮肥的响应

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麦类作物学报 2024年第3期44卷 370-377页

作者：李枫周杨尹鹏李双何雨欣李丰丰赵盼盼满建国华中农业大学植物科学技术学院湖北武汉430000

为探究长江中游不同品质类型小麦产量形成和氮素吸收利用对氮肥的响应,选用强筋品种郑麦9023、中筋品种鄂麦596和弱筋品种扬麦13为供试材料,设置0、60、180和360 kg·hm^(-2)共4个施氮水平,分析了不同施氮水平下各小麦品种的产量、干物... 详细信息

为探究长江中游不同品质类型小麦产量形成和氮素吸收利用对氮肥的响应,选用强筋品种郑麦9023、中筋品种鄂麦596和弱筋品种扬麦13为供试材料,设置0、60、180和360 kg·hm^(-2)共4个施氮水平,分析了不同施氮水平下各小麦品种的产量、干物质积累分配、氮素吸收分配及利用率的差异。结果表明,与不施氮处理相比,施氮处理下郑麦9023、鄂麦596和扬麦13的籽粒产量均显著提高,增幅分别为34.8%~152.0%、30.8%~160.5%和34.6%~137.3%,穗粒数增加是施氮增产的主要原因。增施氮肥显著增加了小麦开花前和成熟期干物质积累量,促进了花前干物质向籽粒的转运。施氮也显著提高了三个品种的籽粒氮素积累量,但显著降低了氮肥偏生产力。品种间比较,鄂麦596的平均产量比郑麦9023和扬麦13分别高14.0%和21.8%,主要得益于其较高的穗粒数、千粒重以及干物质积累量;鄂麦596的花前氮素转运量及转运效率、氮肥偏生产力、氮肥农学利用率均高于其余两个品种,但花后氮素吸收量和氮肥回收率较低。这说明,施氮对不同品质类型小麦产量形成、干物质和氮素积累分配以及氮素利用效率的影响规律基本一致,但影响程度存在差异。

关键词：施肥量小麦品质类型籽粒产量氮素积累与利用