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MATLAB在“计算机控制系统”课程教学中的应用

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移动信息 2024年第7期46卷 150-153页

作者：李幼凤孔霞喻健湖北工程学院计算机与信息科学学院湖北孝感432000

“计算机控制系统”是自动化专业的一门重要课程,它理论性强且实践操作要求高,使用传统的教学模式难以达到新工科建设的要求。为解决该问题,可在理论与实验教学中融入MATLAB软件,将其作为辅助设计与仿真的工具。文中以时滞系统的控制器... 详细信息

“计算机控制系统”是自动化专业的一门重要课程,它理论性强且实践操作要求高,使用传统的教学模式难以达到新工科建设的要求。为解决该问题,可在理论与实验教学中融入MATLAB软件,将其作为辅助设计与仿真的工具。文中以时滞系统的控制器设计为教学案例,实践表明,该方法能有效激发学生的学习热情,促进他们对专业知识的深刻理解和应用,同时提升课堂的教学质量和效率,进一步改善学生的学习效果。

关键词： “计算机控制系统” MATLAB 计算机辅助教学时滞

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疏水材料处理下道路混凝土冻融性能研究

建材世界 2024年第1期45卷 38-41页

作者：孔鲁霞季亚茹济宁市鸿翔公路勘察设计研究院有限公司济宁272000

为了研究疏水材料处理下的混凝土冻融性能,对不同含水率的疏水混凝土进行空气冻融循环试验。结果表明,在充分干燥状态时,经硅烷处理的混凝土吸水率最小;混凝土含水时,相较于其它混凝土,经醋酸钠处理的混凝土吸水率最小;硅树脂作用于完... 详细信息

为了研究疏水材料处理下的混凝土冻融性能,对不同含水率的疏水混凝土进行空气冻融循环试验。结果表明,在充分干燥状态时,经硅烷处理的混凝土吸水率最小;混凝土含水时,相较于其它混凝土,经醋酸钠处理的混凝土吸水率最小;硅树脂作用于完全饱和的混凝土时,混凝土的吸水保护效果优于含氟聚合物和硅烷;混凝土水分高于2.5%时,含氟聚合物对混凝土的保护高于硅烷。

关键词：冻融循环疏水材料混凝土质量变化吸水率

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Effect of surface morphology on wettability conversion

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Journal of Advanced Ceramics 2016年第4期5卷 284-290页

作者： xia kong Yawei HU xiaofang WANG Wei PAN College of Chemistry and Chemical Engineering Shaanxi University of Science and TechnologyXi'an Shaanxi 710021 China State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China

A hierarchical structural surface of TiO2 film with reversibly light-switchable wettability between superhydrophobicity and superhydrophilicity on metal substrate was fabricated through simply dip-coating method from TiO2 precursor solution containing TiO2 nanoparticles with the average diameter 25 nm (P25),followed by heat-treatment and modification with fluoroalkylsilane (FAS) *** morphology,phase and crystallographic structure,and chemical composite of the as-prepared TiO2 film were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD),and X-ray photoelectron spectroscopy (XPS).The wettability of TiO2 film was characterized by a drop shape *** water contact angle of superhydrophobic TiO2 film was up to 165.6°.Under UV irradiation,the water contact angle decreased and the superhydrophobic TiO2 film became superhydrophilic because of hydroxyl groups absorption on the TiO2 ***,the surface morphology of TiO2 film,which resulted from the TiO2 nanoparticles added in TiO2 precursor solution,had a significant effect on the wettability conversion of TiO2 film and enhanced the switch from hydrophobicity to *** wettability could be reversibly switched between superhydrophobicity and superhydrophilicity via alternation of UV exposure and dark storage.

关键词： TiO2 morphology wettability reverse conversion

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无人机遥感下城市道路边界高效提取仿真

计算机仿真 2024年第6期41卷 93-97页

作者：孔玉霞王建华辽宁科技学院资源与土木工程学院辽宁本溪117004 桂林理工大学广西桂林541006

城市道路环境通常是大规模且复杂的,使得无人机采集图像中的影子和模糊等因素会导致道路边界的模糊或不清晰,使得精确提取变得困难。为此提出基于无人机遥感的城市道路边界高精度提取。利用无人机遥感设备采集城市道路遥感图像,对其实... 详细信息

城市道路环境通常是大规模且复杂的,使得无人机采集图像中的影子和模糊等因素会导致道路边界的模糊或不清晰,使得精确提取变得困难。为此提出基于无人机遥感的城市道路边界高精度提取。利用无人机遥感设备采集城市道路遥感图像,对其实施色调-饱和度-亮度(Hue Saturation Value, HSV)色彩空间变换、反射率转换、图像配准和融合处理,去除图像噪声,提高其清晰度;利用简单线索化迭代聚类(Simple Linear Iterative Clustering, SLIC)超像素分割算法分割遥感图像中的道路和非道路像素区域;通过多元局部二值模式(Local Binary Patterns, LBP)特征提取方法实现城市道路边界的高精度提取。实验结果表明,所提方法在提高遥感图像清晰度和去除图像噪声干扰的同时,具有较高的道路边界提取精度和提取效率,边界提取所用时间仅为2.74ms。

关键词：无人机遥感图像处理超像素分割多元局部二值模式特征道路边界提取

Crystal Structure and Thermodynamic Study of Ephedrine Hydrochloride C_(10)H_(16)NOCl(s)

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Chemical Research in Chinese Universities 2010年第2期26卷 304-308页

作者： YANG Wei-wei DI You-ying LI Jing kong Yu-xia College of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 P. R. China

The crystal structure of ephedrine hydrochloride was determined by means of X-ray crystallography. The crystal system of the compound is monoclinic, and the space group is P21. Unit cell parameters are a=0.7308（6） nm, b=0.6124（5） nm, and c= 1.2618（11） nm; β=90°, β= 102°, and γ =90°; Z=2. Low-temperature heat capacities of the title compound were measured with an improved precision automated adiabatic calorimeter over a temperature range from 77 K to 396 K. A polynomial equation of the heat capacities as a function of temperature in the temperature region was fitted by the least-squares. Based on the fitted polynomial equation, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15 K were calculated and tabulated at the intervals of 5 K.

关键词： Ephedrine hydrochloride C10H16NOCl(s) X-ray crystallography Adiabatic calorimetry Low-temperature heat capacity Thermodynamic function

High Sensitive Ambipolar Response towards Oxidizing NO2 and Reducing NH3 Based on Bis（phthalocyaninato） Europium Semiconductors

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Chinese Journal of Chemistry 2016年第10期34卷 975-982页

作者： xia kong Zhen Dong Yanling Wu Xiyou Li Yanli Chen Jianzhuang Jiang School of Science China University of Petroleum (East China) Qingdao Shandong 266580 China Beymg Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry University of Science and Technology Beijing Beijing 100083 China

High sensitive chemical sensors towards NO2 and NH3 based on the self-assembled nanostructures of the heteroleptic and homoleptic bis（phthalocyaninato） europium complexes with octanaphthoxy phthalocyaninato ligands named Eu（Pc）[Pc（ONh）8] （1） and Eu[Pc（ONh）8]2 （2） [Pc = unsubstituted phthalocyaninate; Pc（ONh）8 = 2,3,9,10,16,17,23,24-octanaphthoxy phthalocyaninate] have been developed. The good conductivity, high crystal- linity and large specific surface area for the self-assemblies of 1 render it excellent sensing property for either electron-accepting gas NO2 in 50--250 ppb range or electron-donating gas NH3 in 2.5--12.5 ppm range due to the optimized molecular packing in the uniform-sized nanopartieles depending on the effective intermolecular interaction between double-decker molecules, among the best results of phthalocyanine-based chemical sensors for detection of NO2 and NH3 at room temperature. Interestingly, self-assemblies of I exhibited n-type response to NO2 and p-type response to NH3, which is the first example of ambipolar charge-transporting gas sensors fabricated from single- component organic semiconductors. However, the self-assemblies of 2 with sixteen bulky naphtboxy groups at the periphery of two Pc rings only present an n-type response to strong oxidant gas NO2 in a relatively high concentration of 0.5 - 1.5 ppm, while are insensitive to weak reducing gas NH3 due to the existence of great steric hindrance from bulky naphthoxy groups and more traps and/or defects in self-assemblies.

关键词： phthalocyanine double-decker gas sensor self-assemblies ambipolar semiconductor

Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1113-1126页

作者： Liangjie Gu xia-Ting Feng Rui kong Chengxiang Yang Yuelin xia Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang110819China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Surrounding rocks at different locations are generally subjected to different stress paths during the process of deep hard rock *** this study,to reveal the mechanical parameters of deep surrounding rock under different stress paths,a new cyclic loading and unloading test method for controlled true triaxial loading and unloading and principal stress direction interchange was proposed,and the evolution of mechanical parameters of Shuangjiangkou granite under different stress paths was studied,including the deformation modulus,elastic deformation increment ratios,fracture degree,cohesion and internal friction ***,stress path coefficient was defined to characterize different stress paths,and the functional relationships among the stress path coefficient,rock fracture degree difference coefficient,cohesion and internal friction angle were *** results show that during the true triaxial cyclic loading and unloading process,the deformation modulus and cohesion gradually decrease,while the internal friction angle gradually increases with increasing equivalent crack *** stress path coefficient is exponentially related to the rock fracture degree difference *** the stress path coefficient increases,the degrees of cohesion weakening and internal friction angle strengthening decrease *** cyclic loading and unloading under true triaxial principal stress direction interchange,the direction of crack development changes,and the deformation modulus increases,while the cohesion and internal friction angle decrease slightly,indicating that the principal stress direction interchange has a strengthening effect on the surrounding ***,the influences of the principal stress interchange direction on the stabilities of deep engineering excavation projects are discussed.

关键词： Triaxial cyclic loading and unloading test Stress path Deformation modulus and elastic deformation increment ratios Fracture degree Cohesion and internal friction angle

CNKSR2 mutation causes the X-linked epilepsy-aphasia syndrome:A case report and review of literature

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World Journal of Clinical Cases 2018年第12期6卷 570-576页

作者： Ying Sun Yi-Dan Liu Zhi-Feng Xu Qing-xia kong Yan-Ling Wang Cheeloo College of Medicine Shandong University First Hospital of Handan Department of Neurology Affiliated Hospital of Jining Medical University

The mutation in CNKSR2 leads to a broad spectrum of phenotypic variability and manifests as an X-linked intellectual disability. However, we reported that the male patient in this study not only had intellectual disability but also epileptic seizures. In addition, there were progressive language impairment, attention deficit hype-ractivity disorder and autism. Electroencephalograms showed continuous spike-and-wave during sleep. Genetic testing revealed a de novo mutation of the CNKSR2 gene(c.2185C >T, ***729Ter) in the child that was not detected in the parents. Therefore, the child was diagnosed with X-linked epilepsy aphasia syndrome. Deletion of the CNKSR2 gene has been rarely reported in epilepsy aphasia syndrome, but no de novo mutation has been found in this gene. This report not only adds to the spectrum of epilepsy aphasia syndrome but also helps clinicians in diagnosis and genetic counseling.

关键词： Epilepsy Language impairment Mental retardation De novo mutation of CNKSR2 X-linked epilepsy-aphasia syndrome

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大型公立医院业财融合管理的实践探索

中国医疗管理科学 2024年第1期14卷 112-116页

作者：聂子翔孔霞高爽黄慧文李兴超临沂市人民医院经济管理部山东临沂市276002 中国海洋大学管理学院

以山东省临沂市人民医院的业财融合管理实践为例,围绕提升医院经济管理水平,赋能医院高质量发展,从预算刚性约束和内部费用控制系统应用角度进行研究分析,结合医院智慧财务管控的阶段性成果,提出智慧财务管控的创新思想以及优化思路,将... 详细信息

以山东省临沂市人民医院的业财融合管理实践为例,围绕提升医院经济管理水平,赋能医院高质量发展,从预算刚性约束和内部费用控制系统应用角度进行研究分析,结合医院智慧财务管控的阶段性成果,提出智慧财务管控的创新思想以及优化思路,将“过紧日子”的理念落到实处,为公立医院智慧财务管控建设提供借鉴和参考。

关键词：业财融合公立医院预算管理内部控制