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面向数字化人才培养的大学生信息素养课程创新改革路径和模式探索

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四川文理学院学报 2024年第5期34卷 109-114页

作者：王鹤瑾曾承莉张明明四川文理学院图书馆四川达州635000 四川文理学院教师教育学院四川达州635000

数字化时代的到来驱动着数字人才的培养,各大高校开设的信息素养课程为数字化人才的培养提供了支持渠道,同时也对新时代信息素养课程提出了新要求和新挑战.基于此,通过问卷调查的方法分析了大学生信息素养课程面临的现实状况和迫切问题... 详细信息

数字化时代的到来驱动着数字人才的培养,各大高校开设的信息素养课程为数字化人才的培养提供了支持渠道,同时也对新时代信息素养课程提出了新要求和新挑战.基于此,通过问卷调查的方法分析了大学生信息素养课程面临的现实状况和迫切问题,结合数字化时代人才培养能力框架,从教学目标、教学理念、教学资源、教学反馈、教学支持等多个方面,探索了大学生信息素养课程的创新路径和教学模式,以期为新时代大学生信息素养课程的创新改革提出理论与实践指导.

关键词：数字化数字素养大学生信息素养课程

Design and test results of a low-noise readout integrated circuit for high-energy particle detectors

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Nuclear Science and Techniques 2010年第1期21卷 44-48页

作者： zhang mingming CHEN Zhongjian zhang Yacong LU Wengao JI Lijiu Key Laboratory of Microelectronic Devices and Circuits Institute of Microelectronics Peking University Beijing 100871 China

A low-noise readout integrated circuit for high-energy particle detector is *** noise of charge sensitive amplifier was suppressed by using single-side amplifier and resistors as source ***-time semi-Gaussian filter is chosen to avoid switch *** peaking time of pulse shaper and the gain can be programmed to satisfy *** readout integrated circuit has been designed and fabricated using a 0.35 μm double-poly triple-metal CMOS *** results show the functions of the readout integrated circuit are *** equivalent noise charge with no detector connected is 500–700 e in the typical mode,the gain is tunable within 13–130 mV/fC and the peaking time varies from 0.7 to 1.6 μs,in which the average gain is about 20.5 mV/fC,and the linearity reaches 99.2%.

关键词：读出集成电路高能粒子探测器低噪声设计测试 CMOS工艺峰值时间单端放大器

Pt-surface oxygen vacancies coupling accelerated photo-charge extraction and activated hydrogen evolution

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Nano Research 2023年第4期16卷 4736-4741页

作者： Fangxu Dai mingming zhang Mingzhong Mi Zhenjiang Li Jun Xing Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao 266042China

Semiconductors-based heterogeneous photocatalytic water splitting has been extensively studied,but it still remains challenging to accelerate the separation of electron-hole pairs and facilitate the reaction *** we report a general strategy to fabricate highly efficient Pt/TiO_(2)photocatalyst by coupling the Pt co-catalysts and surface oxygen vacancies(VO)of TiO_(2).TiO_(2)was pre-modified with alkali or alkaline earth metals ion solutions,which produce a large number of surface hydroxyl on TiO_(2).Subsequently,the photodeposited Pt sub-nanoparticles substitute surface hydroxyl and induce surface VO on TiO_(2).The coupling of Pt and surface VO on TiO_(2)can accelerate the extraction of photo-charges through the interaction of Pt-VO-Ti bonds and reduce the hydrogen evolution barrier,thereby promoting the photocatalytic *** synthesized Pt-VO-TiO_(2)sample exhibits a photocatalytic hydrogen evolution activity as high as 1.5 L·g^(−1)·h^(−1),which is 2.2 times that of traditional Pt/TiO_(2).Our findings indepth understand the synergistic effect of co-catalysts and defects on photocatalysis and open up new possibilities for achieving robust photocatalytic water splitting.

关键词： oxygen vacancies co-catalyst surface hydroxyl photocatalytic hydrogen evolution reaction(HER)

Foraging habitat selection of overwintering Black-necked Cranes in the farming area surrounding the Caohai Wetland, Guizhou Province, China

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Avian Research 2020年第1期11卷 74-82页

作者： Dawei Wu Canshi Hu mingming zhang Zhumei Li Haijun Su Forestry College Guizhou UniversityGuizhou 550025China Research Center for Biodiversity and Natural Conservation Guizhou UniversityGuizhou 550025China College of Life Sciences Guizhou UniversityGuizhou 550025China Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region(Guizhou University) Ministry of EducationGuizhou 550025China Guizhou Institute of Biology Guizhou 550005China

Background: Understanding how overwintering birds choose foraging habitats is very important for conservation management. The overwintering Black-necked Crane(Grus nigricollis) feeds on crop remains in farmlands;thus, reasonable conservation management of this type of farmland that surrounds wetlands is critical for the overwintering populations of the Black-necked Crane;however, it is not clear how the Black-necked Crane chooses the foraging land in the ***: A thorough field positioning survey of all foraging sites in farmland areas around the Caohai Wetland and a-sampling analysis of habitat selection by the Black-necked Crane were conducted during the winters from 20162017 and ***: Multiple factors contributed to the selection of foraging habitat in farmlands, i.e., food factors(crop remains and tillage methods) > human disturbance factors(distance to road and settlement) > topography factors(slope aspect), listed according to the strength of influence. Additionally, Black-necked Cranes tend to choose farmland sites where there was no machine tillage, the crop remains were > 500 g/m^2, the distance to residences ranged from 100 to 500 m, the distance to roads ranged from 50 to 100 m, and the slopes exhibited western or eastern aspects. As the winters progressed, the volume of the edible crop remains declined, and the influences of the other main factors also changed, i.e., the factors of human disturbance(distance to road and settlement) became less important, while the effect of the food factor(crop remains) was strengthened. Thus, the foraging sites near the road became more ***: The farming area surrounding the Caohai Wetland is very important for the overwintering Black-necked Crane. Food factors and human disturbance factors are the main factors that influence the choice of feeding ground.

关键词： Black-necked Crane Caohai wetland in Guizhou Farmland around the wetland Foraging habitat selection Overwintering period

钢-连续纤维复合筋珊瑚混凝土梁式拉拔粘结应力分布研究

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硅酸盐通报 2024年第7期43卷 2461-2469,2489页

作者：王磊余涵章明明谷健卢家慧朱得祥桂林理工大学土木工程学院桂林541004 广西绿色建材与建筑工业化重点实验室桂林541004 中国矿业大学力学与土木工程学院徐州221116

为探究钢-连续纤维复合筋(SFCB)在珊瑚混凝土中的粘结应力分布,使用梁式拉拔试验方法,对碳纤维增强复合材料(CFRP)筋和不同直径SFCB珊瑚混凝土进行拉拔,并采用光纤Bragg光栅(FBG)传感技术对筋材应力分布变化动态监测。研究结果表明:SFC... 详细信息

为探究钢-连续纤维复合筋(SFCB)在珊瑚混凝土中的粘结应力分布,使用梁式拉拔试验方法,对碳纤维增强复合材料(CFRP)筋和不同直径SFCB珊瑚混凝土进行拉拔,并采用光纤Bragg光栅(FBG)传感技术对筋材应力分布变化动态监测。研究结果表明:SFCB直径和钢芯直径均会影响荷载-滑移曲线形状;箍筋对筋材初始粘结刚度和SFCB纤维层加载端应变有明显提升;箍筋一定程度可以增强螺纹钢芯的粘结,对光圆钢芯粘结影响不大;SFCB屈服后的粘结应力分布与屈服前有明显差异,钢芯屈服后应力传递现象更明显;由于钢芯具有较高的弹性模量,在相同荷载下SFCB纤维层粘结段各处粘结应力均要大于CFRP筋。

关键词： SFCB 珊瑚混凝土梁式拉拔试验粘结应力分布 SFCB应变光纤光栅传感技术

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复合石灰石粉混凝土耐久性能试验研究

混凝土 2024年第6期 93-98,104页

作者：武业忱吕恒林章明明李杭戚传康中国矿业大学力学与土木工程学院江苏徐州221116 中国矿业大学江苏省工程环境影响与结构安全重点实验室江苏徐州221116 江苏建筑职业技术学院江苏建筑节能与建筑技术协同创新中心江苏徐州221116

为探究不同水胶比及石灰石粉等矿物掺合料对复合石灰石粉混凝土耐久性能的影响,对普通混凝土、石灰石粉-矿渣混凝土以及石灰石粉-矿渣-粉煤灰混凝土的抗碳化、抗冻融、抗氯离子侵蚀等耐久性能展开试验研究。结果表明:在矿物掺合料总掺... 详细信息

为探究不同水胶比及石灰石粉等矿物掺合料对复合石灰石粉混凝土耐久性能的影响,对普通混凝土、石灰石粉-矿渣混凝土以及石灰石粉-矿渣-粉煤灰混凝土的抗碳化、抗冻融、抗氯离子侵蚀等耐久性能展开试验研究。结果表明:在矿物掺合料总掺量固定为50%情况下,(1)降低水胶比可以提高复合石灰石粉混凝土的抗碳化、抗冻融、抗氯离子侵蚀性能;(2)加入石灰石粉可以优化复合石灰石粉混凝土胶凝材料体系的颗粒级配,从而改善了抗冻融和抗氯离子侵蚀性能;(3)矿渣因火山灰效应引起二次水化,一方面降低了复合石灰石粉混凝土的碱性,弱化了抗碳化性能,另一方面水化胶凝产物提高了复合石灰石粉混凝土的密实性,改善了抗冻融和抗氯离子侵蚀性能;(4)粉煤灰等比例代替部分矿渣,对复合石灰石粉混凝土早期的抗碳化、抗冻融和抗氯离子侵蚀等耐久性能不利。

关键词：水胶比复合石灰石粉混凝土碳化冻融氯离子侵蚀

A general model for trailing edge serrations simulation on wind turbine airfoils

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Theoretical & Applied Mechanics Letters 2021年第4期11卷 236-244页

作者： Huijing Cao mingming zhang Yinan zhang Teng Zhou Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China The Key Laboratory of Wind Energy Utilization of CAS Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Dalian National Laboratory For Clean energy Chinese Academy of SciencesDalian 116023China

Trailing edge serrations(TESs)are capable of noticeably suppressing the turbulent trailing edge noise induced by rotating wind turbine blades and become an integral part of a ***,the challenges involved in the dimensional design of serration height 2 h,wavelengthλand flap angleϕare yet to be dealt with in a satisfactory *** address the problem,a general model for simulating the effects of serrations on the hydrodynamic and aeroacoustic performance is proposed due to its ease of use and relatively low requirements for user *** solid serrations are replicated by momentum sources calculated by its aerodynamic ***,a case relevant to wind turbine airfoil is examined,a hybrid improved delay detached eddy simulation(IDDES)method coupled with FW-H integration is deployed to obtain the flow features and far-field sound pressure *** is found that the modeling method could reproduce the flow field and noise as serrated airfoil.

关键词： Wind turbine airfoil Trailing edge serrations Trailing edge noise Modeling method

PDGF signaling from pharyngeal pouches promotes arch artery morphogenesis

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Journal of Genetics and Genomics 2019年第12期46卷 551-559页

作者： Aihua Mao mingming zhang Jie Liu Yu Cao Qiang Wang State Key Laboratory of Membrane Biology Institute of ZoologyUniversity of Chinese Academy of SciencesChinese Academy of SciencesBeijing100101China Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijing100101China

The great vessels of the heart originate from the pharyngeal arch arteries(PAAs).Anomalies of the PAAs often occur together with pharyngeal pouch malfo rmations,but the reasons for this phenomenon are not fully *** the current study,we show that platelet-derived growth factor(PDGF)signaling derived from the pharyngeal pouches plays an important function in PAA vasculogenesis,During PAA development in zebrafish embryos,pdgfaa and pdgfab are expressed in the developing pharyngeal *** from loss-of-function experiments revealed a critical role of these genes in PAA *** found that nitroreductase(NTR)-mediated pouch ablation distinctly decreased PDGF receptor tyrosine phosphorylation,yielding a severe loss of ***,pouch-specific overexpression of pdgfaa in pdgfaa-/-;pdgfab-/-mutants significantly relieved the PAA defects,which indicated a primary role of pharyngeal pouch-expressed PDGF ligands in signal activation and PAA *** findings further showed that PDGF signaling was indispensable for the proliferation of PAA ***,these results established a role for PDGFaa-and PDGFab-mediated tissuetissue interaction during PAA development.

关键词： PDGFαa PDGFαb Pharyngeal pouch Pharyngeal arch artery Tissue-tissue interaction Zebrafish

Bamboo Fiber Modified Asphalt Mixture Proportion Design and Road Performances Based on Response Surface Method

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Journal of Wuhan University of Technology(Materials Science) 2023年第1期38卷 156-170页

作者：李海滨 SUN Jianmei WANG Sirui zhang mingming HU Yihong SHENG Yanping School of Architecture and Civil Engineering Xi’an University of Science and TechnologyXi’an 710054China Shaanxi Transportation Holding Group Co. Ltd.Xi’an 710064China School of Material Science and Engineering Chang’an UniversityXi’an 710064China

In order to comprehensively utilize the remaining bamboo residue of bamboo products,this paper presents a research on recycling the bamboo fibers from bamboo residue for improving the performance of the asphalt *** of all,the basic performance parameters of sinocalamus affinis fiber,phyllostachys pubescens fiber,green bamboo fiber were tested and analyzed,and the optimal content and length were put ***,the mix ratio design of the bamboo fiber modified asphalt mixture was further designed through the response surface method,and was verified the rationality of the mix ***,the mixture specimens were made according to the experimental design mix ratio,and the high temperature,low temperature performance and moisture susceptibility of the bamboo fiber modified mixtures asphalt were *** results showed that the high temperature performance,low temperature performance and moisture susceptibility of bamboo fiber modified asphalt mixtures were improved compared with the performance of SBS modified asphalt *** the length of bamboo fiber is 7.25 mm and the content of 0.22%,the road performance of the asphalt mixture was ***,the decomposition of bamboo residue into bamboo fiber and its application in asphalt pavement can improve the reuse of bamboo waste,with remarkable environmental benefits and great promotion value.

关键词： bamboo fiber response surface method asphalt mixture proportion design road performances bamboo waste