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Chemical Research in Chinese Universities 2020年第6期36卷 1108-1115页

作者： CHEN Peiwen ZHU Lianjie chang zhuangzhuang GAO Hongjia CHEN Deyou QIU Mo School of Chemistry&Chemical Engineering Tianjin Key Laboratory of Organic Solar Cells and Photochemical ConversionTianjin University of TechnologyTianjin 300384P.R.China Agro-Environmental Protection Institute Chinese Academy of Agricultural SciencesTianjin 300191P.R.China

Well-dispersed mesoporous spherical Cu2O assembled by small nanoparticles was synthesized by a green and rapid solution route at room temperature under assistance of ultrasonic,using eco-friendly ascorbic acid(AA)as the main reducing agent and glucose as a weak reducing agent and soft *** CuO spheres were characterized by XRD,SEM,HRTEM,XPS and N2 adsorption-desorption *** optical property was studied by UV-Vis diffuse reflectance absorption spectrum and the photocatalytic activities were evaluted by photodegradations of me thylene blue(MB)under different light *** results show that each spherical Cu2O(ca.200 nm in diameter)was accumulated by numerous small nanoparticles of 8-10 nm and mesopores exist between the nanoparticles,which result in a high BET surface *** spherical Cu2O exhibits good light-harvesting ability in both UV and visiblelight region and excellent photodegradation activities to high concentrations of MB solutions under both UV-visible light and visible light.

关键词： Spherical Cu2O Photodegradation Methylene blue Visible light

Bird’s-eye view of recycled solid wastes in road engineering

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Journal of Road Engineering 2024年第2期4卷 93-150页

作者： zhuangzhuang Liu Tengteng Feng Xingyi Zhu Jie Gao Kui Hu Meng Guo Fan Gu Feng Li School of Highway Chang'an UniversityXi'an 710064China Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang'an UniversityXi'an 710064China Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 200092China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China College of Civil Engineering and Architecture Henan University of TechnologyZhengzhou 450001China State Key Laboratory of Bridge Engineering Safety and Resilience Beijing University of TechnologyBeijing 100124China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100124China School of Traffic&Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China School of Transportation Science and Engineering Beihang UniversityBeijing 102206China

Recent trends in road engineering have explored the potential of incorporating recycled solid wastes into infrastructures that including pavements,bridges,tunnels,and accessory *** utilization of solid wastes is expected to offer sustainable solutions to waste recycling while enhancing the performance of *** review provides an extensive analysis of the recycling of three main types of solid wastes for road engineering purposes:industrial solid waste,infrastructure solid waste,and municipal life solid *** solid wastes suitable for road engineering generally include coal gangue,fly ash,blast furnace slag,silica fume,and steel slag,*** solid wastes recycled in road engineering primarily consist of construction&demolition waste,reclaimed asphalt pavements,and recycled cement ***,recent exploration has extended to the utilization of municipal life solid wastes,such as incinerated bottom ash,glass waste,electronics waste,plastic waste,and rubber waste in road engineering *** recycled solid wastes are categorized into solid waste aggregates,solid waste cements,and solid waste fillers,each playing distinct roles in road *** of solid waste acting aggregates,cements,and fillers in road infrastructures were fully investigated,including their pozzolanic properties,integration effects to virgin materials,modification or enhancement solutions,engineering *** of these materials not only addresses the challenge of waste management but also offers environmental benefits aiming carbon neutral and contributes to sustainable infrastructure ***,challenges such as variability in material properties,environmental impact mitigation,secondary pollution to environment by leaching,and concerns regarding long-term performance need to be further *** these challenges,the recycled solid wastes hold immense potential in revolutionizing road construction

关键词： Road engineering Industrial solid waste Infrastructure solid waste Municipal life waste Recycled materials

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基于放电电压平台研究的蓄电池寿命状态评估

铁道科学与工程学报 2024年第3期21卷 1266-1274页

作者：成庶吕壮壮刘畅向超群中南大学交通运输工程学院湖南长沙410075

为解决传统动车组镍镉蓄电池的返修方法导致部分蓄电池在触发返修条件前已性能劣化,同时大量已达返修标准的蓄电池性能并未过度衰退的问题,设计单体镍镉蓄电池全寿命加速老化实验并获取相关实验数据。首先,采用集成经验模态方法建立单... 详细信息

为解决传统动车组镍镉蓄电池的返修方法导致部分蓄电池在触发返修条件前已性能劣化,同时大量已达返修标准的蓄电池性能并未过度衰退的问题,设计单体镍镉蓄电池全寿命加速老化实验并获取相关实验数据。首先,采用集成经验模态方法建立单体电池全寿命健康状态类别划分模型,然后运用离散小波变换消除放电电压平台数据的奇异值,进而利用极限学习机算法预测蓄电池寿命状态,最终实现对蓄电池全生命周期寿命的准确预测与健康状态评估功能。实验结果表明:相较于传统的蓄电池寿命阈值分类方法,运用集成经验模态建立的健康状态类别划分模型能有效避免蓄电池寿命末端出现误警情况。作为融合算法模型输入的放电电压平台数据易获取,基于离散小波变换的数据预处理方法可提升算法准确率近3%,最终可达到96%~98%。此外,相对于传统的神经网络模型,融合算法模型不涉及迭代,因而能兼顾算法的预测精度与计算效能。蓄电池识别健康状态的F1值为0.976 3,识别老化阶段的F1值为0.950 9,识别故障阶段的F1值为0.939 394。相较于传统的依据动车组运营里程和使用年限进而决定蓄电池是否返修的方法,融合算法模型提供了显著的评判标准,能判别蓄电池是否应该返修,并有效地识别蓄电池的健康状态,降低了动车组的运营成本,保障动车组运营安全,为电池寿命评判和检修策略的优化提供参考。

关键词：寿命评估集成经验模态分解离散小波变换极限学习机放电电压平台在线检测

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某型脉冲雷达发射机双机热备份系统设计

电子设计工程 2021年第6期29卷 65-69页

作者：何晓毛常壮壮郝文东肖振业王晶中国酒泉卫星发射中心甘肃酒泉732750

针对某型脉冲雷达发射机单台设备输出功率低、设备可靠性差的问题,提出了发射机双机热备份系统设计方案。通过加装一套发射机,并利用功率合成器对两套发射机的输出功率进行合成,应用散射参数理论对功率合成效率进行推导,分析影响功率合... 详细信息

针对某型脉冲雷达发射机单台设备输出功率低、设备可靠性差的问题,提出了发射机双机热备份系统设计方案。通过加装一套发射机,并利用功率合成器对两套发射机的输出功率进行合成,应用散射参数理论对功率合成效率进行推导,分析影响功率合成效率的因素,研究使输出功率合成效率最大化的方法,并计算并联后系统的可靠性。结果表明,发射机系统平均无故障工作时间提高了595 h。

关键词：雷达发射机功率合成效率可靠性

基于电化学阻抗谱的锂离子电池分级安全预警方法

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电源技术 2024年第5期48卷 874-880页

作者：田爱娜潘壮壮姜久春王鹿军常春廖力湖北工业大学电气与电子工程学院湖北武汉430068

电化学阻抗谱(EIS)是一种无创原位检测和无损检测方法,可以反映电池内部不同结构的状态。基于EIS的指标可以作为故障预警的重要和优良指标,解决不及时和误报的问题。根据不同过充阶段的EIS特点,分阶段建立了与之对应的分数阶模型。用固... 详细信息

电化学阻抗谱(EIS)是一种无创原位检测和无损检测方法,可以反映电池内部不同结构的状态。基于EIS的指标可以作为故障预警的重要和优良指标,解决不及时和误报的问题。根据不同过充阶段的EIS特点,分阶段建立了与之对应的分数阶模型。用固态电解质相间膜电阻(R_(SEI))和电荷转移电阻(R_(ct))来表示中频段两个电弧随过充的变化。基于与电池内部结构损伤相关的R_(SEI)和R_(ct)指标,提出了三级预警方法。同时采用了新电池和循环老化过的软包电池进行了不同倍率的过充实验,验证了该方法的可靠性。

关键词：锂离子电池电化学阻抗谱安全预警分数阶模型

Catalytic performance of imidazole modified HZSM-5 for methanol to aromatics reaction

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Journal of Energy Chemistry 2017年第3期26卷 574-583页

作者： Haifeng Tian zhuangzhuang Zhang Hui chang Xiaoxun Ma College of Chemical Engineering Northwest UniversityXi’an 710069ShaanxiChina Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy Xi’an 710069ShaanxiChina Research Center of Engineering Technology for Clean Coal Conversion Xi’an 710069ShaanxiChina

A facile approach was developed for the preparation of nano-sized HZSM-5 with a hierarchical mesoporous structure by adding imidazole into conventional zeolite synthesis precursor solution. The physicochemical properties of modified HZSM-5 were characterized by X-ray diffraction（XRD）, N;adsorption–desorption isotherms, scanning electron microscopy（SEM）, NH;-temperature-programmed desorption（NH;-TPD） and pyridine adsorption infrared spectroscopy（Py-IR）. The coke in spent catalysts was characterized by thermogravimetry（TG）. The results showed that hierarchical HZSM-5 zeolites with excellent textural properties, such as abundant porous structure, uniform particle size and suitable acidity, could be synthesized by the recipe of one-pot synthesis routes. Moreover, the obtained HZSM-5 exhibited higher selectivity of total aromatics as well as longer lifetime in the catalytic conversion of methanol to aromatics, comparing with conventional HZSM-5. It is expected that the synthesis approach demonstrated here will be applicable to other zeolites with particular textural properties and controllable particle sizes, facilitating the emergence of new-type porous materials and their related applications in catalysis and separation.

关键词： Imidazole HZSM-5 Methanol Aromatics

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基于图像分析的掘进工作面粉尘颗粒检测方法

工矿自动化 2024年第4期50卷 55-62,77页

作者：龚晓燕冯浩付浩然陈龙常虎强刘壮壮贺子纶裴晓泽薛河西安科技大学机械工程学院陕西西安710054 陕煤集团神木柠条塔矿业有限公司陕西神木719300

基于光散射原理测定粉尘质量浓度只能定时定点手动检测,实时性差,且只能检测出粉尘质量浓度,并不能给出粒径分布范围。目前基于图像分析的粉尘颗粒检测研究主要是针对粉尘质量浓度或粒径分布进行单方面研究,并不能实现粉尘质量浓度和粒... 详细信息

基于光散射原理测定粉尘质量浓度只能定时定点手动检测,实时性差,且只能检测出粉尘质量浓度,并不能给出粒径分布范围。目前基于图像分析的粉尘颗粒检测研究主要是针对粉尘质量浓度或粒径分布进行单方面研究,并不能实现粉尘质量浓度和粒径分布范围的同时检测。针对上述问题,提出了一种基于图像分析的掘进工作面粉尘颗粒检测方法,探究图像特征与粉尘质量浓度、粒径分布间的关系。通过粉尘样本收集及图像采集装置,采集粉尘颗粒图像并获取采集图像时的粉尘质量浓度。编写粉尘样本图像处理算法,提取图像的灰度特征、纹理特征、几何特征相关参数。对提取的图像特征与实测粉尘质量浓度进行相关性分析,选取相关性较大的图像特征作为参数建立回归数学模型。提取粉尘颗粒对象像素点个数,结合转换系数,基于几何当量等效面积径计算粉尘粒径大小及分布范围。实验结果表明:实测粉尘质量浓度与建立的图像特征多元非线性回归模型数学模型计算值间的平均相对误差为12.37%,标准实测粒径与几何当量等效面积径得到的粒径分布间的最大相对误差为8.63%,平均相对误差为6.37%,验证了基于图像特征的粉尘质量浓度回归数学模型和基于几何当量等效面积径分布数学模型的准确性。

关键词：掘进工作面粉尘质量浓度粉尘粒径分布范围图像分析几何当量等效面积径皮尔逊相关系数

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纤维基离子液多酸催化剂的合成及其超深快速脱硫性能研究

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应用化工 2024年第9期53卷 2089-2094页

作者：董兆琪薛丽丽李壮壮吴嘉琪李斯文王伟长安大学水利与环境学院长安大学旱区地下水文与生态效应教育部重点实验室长安大学水利部旱区生态水文与水安全重点实验室

采用浸渍法将Keggin型P-Mo-W多金属氧酸盐(POM)与双离子液体结合在醋酸纤维素(CA)上，获得一种用于萃取氧化脱硫(EODS)的成型催化材料，采用响应面设计实验，探究温度、催化剂质量、氧硫比以及多酸负载量对脱硫的影响。研究表明，最佳... 详细信息

采用浸渍法将Keggin型P-Mo-W多金属氧酸盐(POM)与双离子液体结合在醋酸纤维素(CA)上，获得一种用于萃取氧化脱硫(EODS)的成型催化材料，采用响应面设计实验，探究温度、催化剂质量、氧硫比以及多酸负载量对脱硫的影响。研究表明，最佳脱硫反应条件为：模拟柴油25 mL,催化剂0.16 g,温度63℃,氧硫比4.8,多酸负载量1.08,反应2 h,可将模拟燃油中99.2%的DBT脱除。

关键词：多金属氧酸盐催化剂成型纤维材料超深快速萃取氧化脱硫响应面法

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高密度混合电路封装技术发展趋势及可靠性评价方法研究

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集成电路与嵌入式系统 2024年第7期24卷 25-29页

作者：吉美宁常明超贾子健马保梁王锦董浩威范壮壮中国空间技术研究院北京100094

电子产品向小型化、智能化方向演进已是必然的发展趋势,高密度集成电路封装技术是实现产品小型化的关键技术。本文对高密度混合集成电路封装技术进行了深入研究,从基板选择、结构设计和散热设计等方面对高密度混合集成电路的封装设计进... 详细信息

电子产品向小型化、智能化方向演进已是必然的发展趋势,高密度集成电路封装技术是实现产品小型化的关键技术。本文对高密度混合集成电路封装技术进行了深入研究,从基板选择、结构设计和散热设计等方面对高密度混合集成电路的封装设计进行了论述。在此基础上,结合国外非气密性混合集成电路保证要求,文章进一步研究了高密度非气密混合集成电路的可靠性评价方法,并通过应用实例说明了评价方法的有效性,可作为国产化非气密性集成电路质量保证体系建设的参考。

关键词：混合集成电路封装技术可靠性评价双列直插封装无引脚芯片载体封装

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An improved window opening behavior model involving the division of the dummy variable’s interval level:Case study of an office building in Xi’an during summer

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Building Simulation 2023年第11期16卷 2123-2144页

作者： Yaxiu Gu Tingting Wang Qingqing Dong zhuangzhuang Ma Tong Cui changgui Hu Kun Liu Song Pan Qian Qi Minyan Xie Department of Building Environment and Energy Engineering School of Civil EngineeringChang’an UniversityXi’an710061China State Key Laboratory of Green Building in Western China Xi’an University of Architecture&TechnologyXi’an710055China Hunan Architectural Design Institute Changsha410011China China United Engineering Corporation Limited Hangzhou310052China Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of TechnologyBeijing100124China Shaanxi Environmental Investigation and Assessment Center Xi’an710054China

Window opening behavior significantly impacts indoor air quality,thermal comfort,and energy consumption.A field measurement was carried out in three typical rooms(a standard office,a meeting room and a smoking office)within an office *** window state and the physical environment were continuously recorded during the measured *** typical window opening behaviors were found in the measured samples,namely,active,moderate,and *** common logistic regression coefficient indicated that solar radiation exhibited the greatest effect on window opening behavior in the smoking office and standard ***,window opening behavior in the meeting room was the most strongly correlated with time of the day,mainly because of the meeting schedule for occupants in the meeting *** study discussed the dividing principles involved in setting the dummy variable interval level(discretizing continuous variables and dividing them into different intervals),and proposed a method to determine the optimal interval level of each *** improved model led to the increase in the prediction accuracy rate of the window being opened by 2.0%and 3.3%according to the comparison with the original model based on dummy variables and the common model based on continuous variables,*** study can provide a reference value for simulating energy consumption in office buildings in the future.

关键词： office building window opening behavior influencing factors logistic regression model dummy variables optimal interval level