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核心素养视角下高考化学试题情境的计量分析——2022年全国和部分省份高考化学试题

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化学教育（中英文） 2024年第5期45卷 35-40页

作者：张庆玲陈丽萍内蒙古师范大学化学与环境科学学院内蒙古呼和浩特010022

通过构建化学试题情境分析框架,对2022年全国甲、乙卷和4个省份的高考化学试题情境进行量化分析。结果表明,高考化学学科命题重视情境的运用和呈现方式的多样化,情境主题来源广泛,且与生产生活的联系较为紧密。但在真实情境的占比、开... 详细信息

通过构建化学试题情境分析框架,对2022年全国甲、乙卷和4个省份的高考化学试题情境进行量化分析。结果表明,高考化学学科命题重视情境的运用和呈现方式的多样化,情境主题来源广泛,且与生产生活的联系较为紧密。但在真实情境的占比、开放性问题的设置、问题与情境的关联程度、问题与情感态度价值观的融合程度等方面稍显不足。

关键词：核心素养情境类型学试题情境高考

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异形孔筒形锻件成形表面不平整度分析及验证

塑性工程学报 2024年第10期31卷 27-34页

作者：张庆玲刘新宇金淼燕山大学机械工程学院河北秦皇岛066004 齐鲁中科光物理与工程技术研究院山东济南250000

针对异形孔筒形锻件成形过程中金属在反向流动中流速不均匀导致的锻件上表面产生不平整缺陷的问题,以椭圆孔筒形锻件为例,采用数值模拟与试验相结合的手段,探究了锻件上表面不平整现象的成因。分别从一维、二维、三维建立了异形孔筒形... 详细信息

针对异形孔筒形锻件成形过程中金属在反向流动中流速不均匀导致的锻件上表面产生不平整缺陷的问题,以椭圆孔筒形锻件为例,采用数值模拟与试验相结合的手段,探究了锻件上表面不平整现象的成因。分别从一维、二维、三维建立了异形孔筒形锻件上表面不平整度的评判准则,进一步揭示了成形工艺参数对异形孔筒形锻件上表面不平整度的影响规律。结果表明:异形孔筒形锻件上表面不平整度随模具预热温度的升高而降低,随坯料始锻温度的升高而增大,始锻温度比模具预热温度对上表面不平整度的影响更大;提高成形速度可以降低金属的流动阻力,减小坯料的温降,改善坯料变形和温度分布的均匀性,从而降低异形孔筒形锻件上表面的不平整度;异形孔筒形锻件上表面不平整度还受椭圆孔短长轴比值的影响,凸模横截面积恒定时,随短长轴比值增大,不平整度评价指标均呈下降趋势;凸模短轴值恒定,长轴值超过锻件外径的2/3时,随短长轴比值增大,不平整度评价指标呈现先增大后减小的趋势,长轴值小于锻件外径的2/3时,不平整度评价指标随短长轴比值增大呈现下降趋势。

关键词：异形孔挤压成形仿真表面不平整度工艺参数

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Adsorption mechanism of different coal ranks under variable temperature and pressure conditions

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Journal of China University of Mining and Technology 2008年第3期18卷 395-400页

作者： zhang qing-ling Xi＇ an Branch of China Coal Research Institute Xi＇ an Shaanxi 710054 China

Variable temperature and pressure adsorption tests were conducted on four coal samples with different coal ranks, under simulated temperatures and pressures corresponding to coal reservoirs at different depths. The regularity of the variation in the amounts of adsorption by coals under variable temperature and pressure and 30 ℃ isothermal conditions are compared and the adsorption characteristics of coal under the composite effect of temperature and pressure were obtained. The adsorption test and data processing method of coal under variable temperature and pressure are presented and the effect of the mechanism of temperature and pressure on the adsorption capacity of coal has been studied. The research results are of significant importance in the investigation of coalbed methane storage mechanism and for the prediction of the amounts of coalbed methane at various depths.

关键词： coal variable temperature and pressure test adsorotion characteristics

基于MLabs移动虚拟仿真技术的药物化学实验线上线下混合式教学

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化学教育（中英文） 2024年第10期45卷 79-86页

作者：翟洋洋李雪雁周景春张庆岭河南理工大学医学院河南焦作454000 焦作市卫生医药学校河南焦作454000 北京本草方源药业集团有限公司北京102612

针对传统药物化学实验教学中的不足,介绍了基于MLabs移动虚拟仿真技术的药物化学实验线上线下混合式教学模式的建设内容,构建了一个更加多元化和全面化的教学评价系统,对教学模式的实践成效进行了定量和定性研究。通过近几学年的教学实... 详细信息

针对传统药物化学实验教学中的不足,介绍了基于MLabs移动虚拟仿真技术的药物化学实验线上线下混合式教学模式的建设内容,构建了一个更加多元化和全面化的教学评价系统,对教学模式的实践成效进行了定量和定性研究。通过近几学年的教学实践发现,以MLabs移动虚拟仿真技术辅助传统教学,既保持了传统实验教学的实践性和真实性,又通过移动虚拟仿真技术提供的更灵活、安全、可重复和创新性的实验学习环境,更好地满足了学生的学习需求,有效弥补了传统药物化学实验教学中学生预习效果差导致实验成功率低等方面的缺陷,促进了学生对药物化学实验的理解和应用能力的提升,同时也激发了学生对药物化学学习的兴趣。另外,MLabs移动虚拟仿真技术的考核和分析统计功能为教师在开展现场实验教学过程中,针对学生知识点掌握的薄弱环节开展针对性强化训练提供了有效手段。最后,对该实验教学模式存在的问题给出了建议,为进一步推进基于MLabs移动虚拟仿真技术的药物化学实验教学模式提供参考。

关键词： MLabs移动虚拟仿真技术药物化学实验线上线下混合式实验教学

Passive Control for Uncertain Discrete Singular Bilinear Systems

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Passive Control for Uncertain Discrete Singular Bilinear Sys...

第25届中国控制与决策会议

作者： zhang Xiu-hua zhang qing-ling School of Science Northeastern University

ISBN: (纸本)9781467355339

The passive control problem for a class of uncertain discrete singular bilinear systems is investigated. By means of generalized Lyapunov function and generalized Riccati inequality and linear matrix inequality, a sufficient condition is derived such that a prescribed discrete singular bilinear systems with time-delay is passive and its zero solution is asymptotically *** making use of the method of Norm-bounded, the bilinear items was manipulated ingeniously .Finally, an example is given to illustrate the validity of the obtained results.

关键词： uncertain bilinear singular passive robust

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海南省文昌鸡传染性贫血的血清学调查

动物医学进展 2024年第1期45卷 121-125页

作者：张庆玲史慧君刘光亮晁哲刘海隆魏立民张艳新疆农业大学动物医学学院新疆乌鲁木齐830052 海南省农业科学院三亚研究院(海南省实验动物研究中心) 海南三亚572025 海南省农业科学院畜牧兽医研究所海南海口571100 海南省热带动物繁育与疫病研究重点实验室海南海口571100

为掌握海南省文昌鸡传染性贫血(CIAV)的流行情况,分别从海南省4个文昌鸡主要养殖地区海口、文昌、琼海和儋州的14个不同规模未免疫CIA疫苗的文昌鸡场采集血液样品1709份,采用ELISA检测CIAV抗体。结果显示,1709份血液样品共检出阳性样品... 详细信息

为掌握海南省文昌鸡传染性贫血(CIAV)的流行情况,分别从海南省4个文昌鸡主要养殖地区海口、文昌、琼海和儋州的14个不同规模未免疫CIA疫苗的文昌鸡场采集血液样品1709份,采用ELISA检测CIAV抗体。结果显示,1709份血液样品共检出阳性样品564份,文昌鸡的CIAV抗体总阳性率为33%;4个地区的文昌鸡场均有不同程度的CIAV感染,其中儋州市文昌鸡的CIAV抗体阳性率最高,达到55%;成年文昌鸡的CIAV感染程度高于其他生长阶段鸡,抗体阳性率达到53.63%;CIAV在一年四季均有发生,以冬季高发,抗体阳性率为48.06%;不同规模文昌鸡场CIAV的感染率存在差异,以中小规模文昌鸡场的CIAV感染程度较高,抗体阳性率分别为41.48%和40.10%;在不同类型的文昌鸡群中商品代蛋鸡的CIAV抗体阳性率最高,达到62.62%。结果表明,CIAV在海南省文昌鸡养殖地区普遍存在,且在冬季、成年文昌鸡中高发,以商品代蛋鸡感染最为严重,因此,应针对性地加强对海南省文昌鸡传染性贫血的防控。

关键词：鸡传染性贫血血清学调查文昌鸡

Further Analysis of the Function of AtBHLH29 in Regulating the Iron Uptake Process in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2006年第1期48卷 75-84页

作者： Juan zhang Hui-Fen Zhu Hui Liang Kun-Fan Liu Ai-Min zhang Hong-qing ling Dao-Wen Wang Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Using T-DNA insertion and chemical mutants, two recent studies have shown that AtBHLH29, encoding a putative basic helix-loop-helix （BHLH） protein, is involved in regulating the iron uptake process in Arabidopsis thaliana. Herein, we report that RNA interference （RNAi） mutants can be used to reveal more accurately the genetic function of AtBHLH29. We compared the iron deficiency responses of seven RNAi strains that contained decreasing amounts of AtBHLH29transcripts. Under high iron conditions （50 μmol/L iron）, only in the most severe RNAi strains （R101, R111, and R119） was plant growth significantly retarded. However, these mutants could still survive and produce seeds. This suggests that the function of AtBHLH29 is beneficial, but not absolutely essential, to plant growth when iron supply is not limiting. Under low iron conditions （less than 10 μmol/L iron）, the Rlll and R119 strains died prematurely, demonstrating that AtBHLH29 is absolutely necessary for plant survival when iron supply is restricted. The transcription of AtBHLH29 was essential for the expression of AtFRO2 （encoding the ferric chelate reductase）. In contrast, the expression of AtlRT1 （encoding the high-affinity iron transporter） was not so strongly dependent upon the transcription of AtBHLH29. By transient expression, we found that the AtBHLH29-GUS fusion protein was targeted specifically to the nucleus in plant cells. Interestingly, the nuclear localization of AtBHLH29-GUS was abolished when the four consecutive arginine residues located in the basic region of the putative AtBHLH29 protein were replaced by alanine residues by mutagenesis. The implications of our findings on further studies of the mechanism underlying the function of AtBHLH29 are discussed.

关键词： Arabidopsis AtBHLH29 basic helix-loop-helix protein iron RNA interference.

Radiative Cooling Instability in Large Scale Line-shaped Laser Plasma

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Chinese Physics Letters 1997年第6期14卷 428-431页

作者： WU Yan-qing HAN Shen-sheng SHEN Bai-fei zhang ling-qing SONG Xiang-yang XU Zhi-zhan Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800

In the experiment of generating laser plasma in a line-focus system we found that the x-ray emission nonuniformity was increased rapidly after the pumping laser has been turned *** study indicates that radiative cooli... 详细信息

关键词： pumping laser nonuniformity

Passivity Control for Uncertain T-S Fuzzy Descriptor Systems

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自动化学报 2006年第5期32卷 674-679页

作者： ZHU Bao-Yan zhang qing-ling TONG Shao-Cheng Institute of Systems Science Northeastern University Shenyang 110004 College of Sciences Shenyang Jianzhu University Shenyang 110168 Department of Mathematics and Physics Liaoning Institute of Technology Jinzhou 121001

By means of matrix decomposition method a criterion is presented for the admissibility of T-S fuzzy descriptor system. Then, the problem of passivity control is studied for a kind of T-S fuzzy descriptor system with uncertain parameters, and sufficient conditions which make the closed-loop system admissible and strictly passive are obtained based on linear matrix inequality (LMI). The nonstrict LMIs restricted conditions which characterize the descriptor system are transformed into strict ones, so testing admissibility and passivity of the system can be finished simultaneously. The design scheme of state feedback controller is also obtained. Finally, a numerical example is given to show the validity and feasibility of the proposed approach.

关键词： Uncertain T-S fuzzy descriptor systems admissibility passivity linear matrix inequality (LMI)