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中小学教师行动研究能力的结构模型及提升路径

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教师教育学报 2024年第3期11卷 74-83页

作者：邱德峰王思宇白洁西南大学教师教育学院重庆400715 盘龙区教育体育局云南昆明650051

行动研究是一线中小学教师较为青睐的一种研究方式。教师缺乏对行动研究的深入理解,导致他们在实际研究过程中遭遇了各种各样的困惑。建立行动研究能力结构模型,有助于一线中小学教师精准地把握行动研究的核心要义,从而真正弄懂行动研... 详细信息

行动研究是一线中小学教师较为青睐的一种研究方式。教师缺乏对行动研究的深入理解,导致他们在实际研究过程中遭遇了各种各样的困惑。建立行动研究能力结构模型,有助于一线中小学教师精准地把握行动研究的核心要义,从而真正弄懂行动研究究竟是什么以及如何做。基于对相关文献的研究及分析,结合教学实际,提炼出了以问题意识、沟通合作能力、科研能力、分析与总结能力、反思与改进能力等为核心能力要素的“阶梯状-多相关”能力结构模型。该模型可以对中小学教师行动研究能力进行可视化展示。基于模型启示,提出了提升教师行动研究能力、促进教师专业发展的四条实施路径:构建行动研究实践共同体,促进教师沟通合作参与能力;以科研项目为驱动力,让教师在“做中学”的实践中发展科研能力;保持全过程反思,激发教师问题意识及研究自觉性;恪守终身学习理念,在学习与行动的循环中提升教师能力。

关键词：中小学教师行动研究能力结构模型反思性实践 “做中学”

Phase Residual Estimations for PCVs of Spaceborne GPS Receiver Antenna and Their Impacts on Precise Orbit Determination of GRACE Satellites

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Chinese Journal of Aeronautics 2012年第4期25卷 631-639页

作者： TU Jia GU defeng WU Yi YI Dongyun College of Science National University of Defense TechnologyChangsha 410073China

In-flight phase center systematic errors of global positioning system（GPS） receiver antenna are the main restriction for improving the precision of precise orbit determination using dual-frequency *** approach is one of the valid methods for in-flight calibration of GPS receiver antenna phase center variations（PCVs） from ground *** this paper,followed by the correction model of spaceborne GPS receiver antenna phase center,ionosphere-free PCVs can be directly estimated by ionosphere-free carrier phase post-fit residuals of reduced dynamic orbit *** the data processing of gravity recovery and climate experiment（GRACE） satellites,the following conclusions are ***,the distributions of ionosphere-free carrier phase post-fit residuals from different periods have the similar systematic ***,simulations show that the influence of phase residual estimations for ionosphere-free PCVs on orbit determination can reach the centimeter ***,it is shown by in-flight data processing that phase residual estimations of current period could not only be used for the calibration for GPS receiver antenna phase center of foretime and current period,but also be used for the forecast of ionosphere-free PCVs in future period,and the accuracy of orbit determination can be well improved.

关键词： global positioning system precise orbit determination phase center variations phase residual estimation GRACE

Superposition model for analyzing the dynamic ground subsidence in mining area of thick loose layer

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International Journal of Mining Science and Technology 2018年第4期28卷 656-661页

作者： defeng Hou Dehai Li Guosheng Xu Yanbin Zhang College of Resources & Safety Engineering China University of Mining & Technology Institute of Energy Science and Engineering Henan Polytechnic Universit

The dynamic ground subsidence due to underground mining is a complicated time-dependent and rate- dependent process. Based. on the theory of rock rheology and probability integral method, this study developed the superposltlOn model for the prediction and analysis of the ground dynamic subsidence in mining area of thick !oose layer. The model consists of two parts （the prediction of overlying bedrock and the prediction of thick loose layer）. The overlying bedrock is regarded as visco-elastic beam, of which the dynamic subsidence is predicted by the Kelvin visco-elastic rheological model. The thick loose layer is regarded as random medium, and the ground dynamic subsidence, is predicted by the probability integral model. At last, the two prediction models are vertically stacked in the same coordinate system, and the bedrock dynamic subsidence is regarded as a variable mining thickness input into the prediction model of ground dynamic subsidence. The prediction results obtained were compared w^th actual movement and deformation data from Zhao I and Zhao II mine, central China. The agreement of the prediction results with the. field *** that the superposition model （SM） is more satisfactory and the formulae obtained are more effective than the classical single probability Integral model（SPIM）, and thus can be effectively used for predicting the ground dynamic subsidence in mining area of thick loose layer.

关键词： Thick loose layer Dynamic groundsubsidence Kelvin visco-elastic rheological model Random medium Single probability integral model Superposition model

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InGaAs单光子探测器封装技术进展

激光与光电子学进展 2024年第9期61卷 102-111页

作者：张晨阳莫德锋徐红艳马英杰李雪苏文献上海理工大学能源与动力工程学院上海200093 中国科学院上海技术物理研究所红外探测全国重点实验室上海200083

InGaAs单光子探测器已被广泛应用于激光三维成像、长距离高速数字通信、自由空间光通信和量子通信等。针对单元、线列和小面阵器件,已发展出同轴封装、蝶形封装、插针网格阵列封装等多种封装形式。探讨了温度对InGaAs单光子器件性能的... 详细信息

InGaAs单光子探测器已被广泛应用于激光三维成像、长距离高速数字通信、自由空间光通信和量子通信等。针对单元、线列和小面阵器件,已发展出同轴封装、蝶形封装、插针网格阵列封装等多种封装形式。探讨了温度对InGaAs单光子器件性能的影响及组件温控方法;系统比较分析了针对光学元件如微透镜、透镜、光纤等与芯片的高精度耦合方法;针对高频信号输出,总结了引线类型、布线方式、封装结构设计等问题;展望了InGaAs单光子探测器的发展趋势。

关键词：雪崩光电二极管 InGaAs 单光子探测器封装

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滚子与内圈打滑行为诱导的振动特性

轴承 2024年第1期 86-91页

作者：马德锋孙琦孙军栋雷浩伟刘公平洛阳轴承研究所有限公司河南洛阳471039 河南省高性能轴承技术重点实验室河南洛阳471039 中国航发西安动力控制科技有限公司西安710000 空军装备部驻洛阳地区第二军事代表室河南洛阳471000

针对滚子打滑试验研究困难的问题,通过分析滚子-内圈运动副的相对运动关系得出运动副振动特征频率的计算公式,在此基础上开展打滑试验,提取滚子纯滚动、打滑状态下的振动信号并采用短时傅里叶变换进行时频域分析,结果表明:滚子打滑会诱... 详细信息

针对滚子打滑试验研究困难的问题,通过分析滚子-内圈运动副的相对运动关系得出运动副振动特征频率的计算公式,在此基础上开展打滑试验,提取滚子纯滚动、打滑状态下的振动信号并采用短时傅里叶变换进行时频域分析,结果表明:滚子打滑会诱发一定的振动响应,其频率与滚子、内圈的转动频率相关,理论计算结果与试验结果较为吻合,可用于测算滚子打滑程度;滚子由纯滚动状态转变为打滑状态或由打滑状态转变为纯滚动状态时,纵向、切向振动的幅值均会发生突变,切向振动信号占主要成分且幅值更大。

关键词：滚动轴承滚子内圈打滑振动频率动力学分析

Integrating BDS and GPS for precise relative orbit determination of LEO formation flying

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Chinese Journal of Aeronautics 2018年第10期31卷 2013-2022页

作者： Bin YI defeng GU Xiao CHANG Kai SHAO College of Liberal Arts and Sciences National University of Defense Technology

Low-Earth-Orbit（LEO） formation-flying satellites have been widely applied in many kinds of space geodesy. Precise Relative Orbit Determination（PROD） is an essential prerequisite for the LEO formation-flying satellites to complete their mission in space. The contribution of the BeiDou Navigation Satellite System（BDS） to the accuracy and reliability of PROD of LEO formation-flying satellites based on a Global Positioning System（GPS） is studied using a simulation method. Firstly, when BDS is added to GPS, the mean number of visible satellites increases from9.71 to 21.58. Secondly, the results show that the 3-Dimensional（3 D） accuracy of PROD, based on BDS-only, GPS-only and BDS ＋ GPS, is 0.74 mm, 0.66 mm and 0.52 mm, respectively. When BDS co-works with GPS, the accuracy increases by 29.73%. Geostationary-Earth-Orbit（GEO） satellites and Inclined Geosynchronous-Orbit（IGSO） satellites are only distributed over the Asia-Pacific region; however, they could provide a global improvement to PROD. The difference in PROD results between the Asia-Pacific region and the non-Asia-Pacific region is not apparent. Furthermore, the value of the Ambiguity Dilution Of Precision（ADOP）, based on BDS ＋ GPS, decreases by 7.50% and 8.26%, respectively, compared with BDS-only and GPS-only. Finally, if the relative position between satellites is only a few kilometres, the effect of ephemeris errors on PROD could be ignored. However, for a several-hundred-kilometre separation of the LEO satellites, the SingleDifference（SD） ephemeris errors of GEO satellites would be on the order of centimetres. The experimental results show that when IGSO satellites and Medium-Earth-Orbit（MEO） satellites co-work with GEO satellites, the accuracy decreases by 17.02%.

关键词： Ambiguity Dilution Of Precision BeiDou Navigation Satellite System Geostationary-Earth-Orbit Global Positioning System LEO formation flying Precise Relative Orbit Determination

Empirical Research on Carrying Capacity of Human Settlement System in Dalian City, Liaoning Province, China

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Chinese Geographical Science 2015年第2期25卷 237-249页

作者： ZHENG defeng ZHANG Yu ZANG Zheng SUN Caizhi School of Urban Planning and Environmental Science Liaoning Normal University Center for Studies of Marine Economy and Sustainable Development Liaoning Normal University

Using the theories of population carrying capacity and ecological elasticity in other fields for reference, the connotation of regional human settlement system was defined from the viewpoint of the complex relationship among the factors such as regional population, resources, environment and economic and social development in the context of China′s rapid urbanization. Then the concept and characterization methods of the regional human settlement carrying capacity were proposed by means of population scale. Furthermore, a model of carrying capacity-pressure-state-response(CPSR) on regional human settlement system was established by referencing pressure-state-response(PSR) model, and the Catastrophe Theory was introduced to determine the corresponding standards of multi-criteria programming and evaluation. Taking Dalian City, Liaoning Province, China as an example, an empirical analysis on evaluation of human settlement system from 2000 to 2012 was carried out. The results showed that the carrying capacity of human settlement system in Dalian was fluctuating between 9.6 × 106 to 10 × 106 persons with a quantitative stage of the dynamic regulation. During the research period the load index of human settlement system in Dalian dropped from 0.96 to 0.84 with a lower pressure of human settlement system than the national average level. And the emergency response grades of human settlement system in Dalian were kept in grade Ⅱ(orange warning) or grade Ⅲ(yellow warning). Human settlement system of Dalian was in slight security state as a whole, but the load had a tendency of increase in recent years. The related departments should pay close attention to regional human settlement system and take active measures to improve human settlement by both intensity control and total quantity control. By comparison, analysis and discussion, it was considered that the results were basically accordded with the current situations of human settlement in Dalian, and the evaluation results w

关键词： human settlement capacity-pressure-state-response(CPSR) model carrying capacity multi-objective decision making Dalian City China

4种提取方法对对虾肌原纤维蛋白提取率、空间结构和热稳定性的影响

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广东海洋大学学报 2024年第3期44卷 119-127页

作者：徐德峰廖威龙叶盛权廖建萌广东海洋大学食品科技学院广东湛江524088 广东医科大学海洋医药研究院广东湛江524023 湛江市食品药品检验所广东湛江524000

【目的】获取提取率高且结构完整的凡纳滨对虾(Litopenaeus vannamei)肌原纤维蛋白。【方法】通过0.5 mol/L KCl、53 kHz超声辅助0.5 mol/L KCl、53 kHz超声辅助质量分数5%十二烷基硫酸钠(SDS)和RIPA裂解液这4种提取方法提取对虾肌原纤... 详细信息

【目的】获取提取率高且结构完整的凡纳滨对虾(Litopenaeus vannamei)肌原纤维蛋白。【方法】通过0.5 mol/L KCl、53 kHz超声辅助0.5 mol/L KCl、53 kHz超声辅助质量分数5%十二烷基硫酸钠(SDS)和RIPA裂解液这4种提取方法提取对虾肌原纤维蛋白,以肌原纤维蛋白提取率和结构完整性为评价指标,采用光谱学和凝胶电泳生化,评价四种提取方法对对虾肌原纤维蛋白提取率、空间结构和热稳定性的影响。【结果】53 kHz超声辅助0.5 mol/L KCl、0.5 mol/L KCl、53 kHz超声辅助5%SDS和RIPA裂解液4种方法所得提取率分别为(87.99±3.08)%、(53.76±3.90)%、(75.59±0.95)%和(95.46±4.49)%。53 kHz超声辅助0.5 mol/L KCl提取的蛋白中肌钙蛋白和原肌球蛋白蛋白丰度较高,0.5 mol/L KCl和53 kHz超声辅助质量分数5%SDS提取的肌球蛋白重链和肌动蛋白蛋白丰度较高;相较于0.5 mol/L KCl,超声辅助提取可最大限度保持肌原纤维蛋白天然结构,α-螺旋结构保留完好;0.5 mol/L KCl提取可较好维持肌原纤维蛋白的酰胺Ⅰ带结构。RIPA裂解液提取对肌原纤维蛋白二级结构有明显破坏,热稳定性仅为原蛋白的(60.63±4.46)%。【结论】综合提取率、空间结构和热稳定性结果,采用53 kHz超声辅助5%SDS提取可获得质量最佳的凡纳滨对虾肌原纤维。本研究可为后续深入解析冷藏对虾品质劣变和开发高效控制技术提供高质量的肌原纤维蛋白。

关键词：对虾肌原纤维蛋白提取率光谱分析热稳定性

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以急性腹痛为首发症状的恶性疟1例

中国血吸虫病防治杂志 2024年第2期36卷 219-220页

作者：张东友李娜周文奇张蕾梁绮孟德峰中国人民解放军陆军第948医院新疆乌苏833000

恶性疟是由恶性疟原虫感染所致的虫媒传染性疾病,高发于非洲热带地区。该病表现复杂且不典型,临床上易误诊漏诊,若不及时治疗,可危及患者生命。本研究报道了1例以急性腹痛为首发症状的胃肠型恶性疟病例的诊治过程。

关键词：恶性疟腹痛误诊病例报道