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Journal of Iron and Steel Research International 2024年第5期31卷 1082-1094页

作者： qing-ke Sun Yao-zu Wang Jian-liang Zhang Zheng-jian Liu Le-le Niu Chang-dong shan Yun-fei Ma Institute of Artificial Intelligence University of Science and Technology BeijingBeijing100083China School of Intelligence Science and Technology University of Science and Technology BeijingBeijing100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The basic high-temperature properties of iron ore play a crucial role in optimizing sintering and ore blending,but the testing process for these properties is complex and has significant lag time,which cannot meet the actual needs of ore blending.A prediction model for the basic high-temperature properties of iron ore fines was thus proposed based on a combination of machine learning algorithms and genetic ***,the prediction accuracy of different machine learning models for the basic high-temperature properties of iron ore fines was ***,a random forest model optimized by genetic algorithms was built,further improving the prediction accuracy of the *** test results show that the random forest model optimized by genetic algorithms has the highest prediction accuracy for the lowest assimilation temperature and liquid phase fluidity of iron ore,with a determination coefficient of 0.903 for the lowest assimilation temperature and 0.927 for the liquid phase fluidity after *** trained model meets the fluctuation requirements of on-site testing and has been successfully applied to actual production on site.

关键词： Iron ore Basic high-temperature property Machine learning Random forest Genetic algorithm

Information Heterogeneity: Implications for Liquidity and Price Efficiency

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Acta Mathematicae Applicatae Sinica 2024年

作者： Zhi-hua LI Hong LIU qing-shan YANG Northeast Normal University KLAS and School of Mathematics and Statistics

This paper discusses a model about information heterogeneity. The market size, information attention and information asymmetry affect market liquidity and price information. Larger market size can lead to an increase in market liquidity and the release of price information; however, traders who possess higher information attention can quickly affect price efficiency through their trading, leading to increased price *** addition, the increase in asymmetry scale will lead to a decrease in liquidity and a reduction in the release of price information. Under information asymmetry, large trading groups attract followers, thereby increasing market liquidity and trading intensity.

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基于CDMA/GPRS/RADIO技术的无线环境监控终端设计

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化工自动化及仪表 2006年第3期33卷 39-43页

作者：佘青山苏宏业董利达浙江大学先进控制研究所工业控制技术国家重点实验室杭州310027

针对传统环境监测系统不能实现跨通信平台、无线远程数据传输和控制,本文设计了以AVR AT-m ega128为核心部件,采用μC/OS-Ⅱ嵌入式实时操作系统的无线环境监控终端。该终端与环境监控中心通过CDMA/GPRS/RAD IO无线通信平台进行数据双向... 详细信息

针对传统环境监测系统不能实现跨通信平台、无线远程数据传输和控制,本文设计了以AVR AT-m ega128为核心部件,采用μC/OS-Ⅱ嵌入式实时操作系统的无线环境监控终端。该终端与环境监控中心通过CDMA/GPRS/RAD IO无线通信平台进行数据双向传输,突破了传统环境监控系统受地域范围的限制,实现了对环境的远程化、网络化、无人化监控。现场应用结果表明所设计的无线环境监控终端运行稳定,性能可靠。

关键词：无线监控环境监测实时操作系统 CDMA GPRS

Microwave-Assisted Confining Growth and Liquid Exfoliation of sp^(3)-Hybrid Carbon Nitride Nano/Micro-Crystals

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Energy & Environmental Materials 2024年第6期7卷 399-408页

作者： Chenglong shen qing Lou Kaikai Liu Guangsong Zheng Runwei Song Jinhao Zang Xigui Yang Xing Li Lin Dong Chongxin shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and Laboratory of Zhongyuan LightZhengzhou UniversityZhengzhou 450052China

As one promising carbon-based material,sp^(3)-hybrid carbon nitride has been predicted with various novel physicochemical ***,the synthesis of sp^(3)-hybrid carbon nitride is still limited by the nanaoscale,low crystallinity,complex source,and expensive ***,we have presented a facile approach to the sp^(3)-hybrid carbon nitride nano/micro-crystals with microwave-assisted confining growth and liquid ***,the carbon nitride nano/micro-crystals can spontaneously emerge and grow in the microwave-assisted polymerization of citric acid and urea,and the liquid exfoliation can break the bulk disorder polymer to retrieve the highly crystalline carbon nitride nano/*** obtained carbon nitride nano/micro-crystals present superior blue light absorption strength and surprising photoluminescence quantum yields of 57.96%in ethanol and 18.05%in solid *** experimental characterizations and density functional theory calculations reveal that the interface-trapped localized exciton may contribute to the excellent intrinsic light emission capability of carbon nitride nano/micro-crystals and the interparticle staggered stacking will prevent the aggregation-caused-quenching ***,the carbon nitride nano/micro-crystals are demonstrated to be potentially useful as the phosphor medium in light-emitting-diode for interrupting blue light-induced eye *** work paves new light on the synthesis strategy of sp^(3)-hybrid carbon nitride materials and thus may push forward the development of multiple carbon nitride research.

关键词： confining growth density functional theory liquid exfoliation luminescence sp^(3)-hybrid carbon nitride

Patterns of Emergent Nonlinear Waves in an Initial Discontinuity Problem of the Bad Jaulent-Miodek Equation

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Acta Mathematicae Applicatae Sinica 2024年

作者： Ya-qing LIU Bo-ling GUO Deng-shan WANG School of Applied Science Beijing Information Science and Technology University Institute of Applied Physics and Computational Mathematics Beijing Laboratory of Mathematics and Complex Systems (Ministry of Education) School of Mathematical Sciences Beijing Normal University

By means of the Whitham modulation theory, this paper studies the discontinuous initial value problem of the bad Jaulent-Miodek(JM) equation, which is compared with the good JM equation. The linear stability of the good and bad JM equations is analyzed to show the difference between the two equations. Also the physical significance of the JM equations is discussed by considering the reduction of the Euler's *** the zero-, one-, two-phase periodic solutions and the corresponding Whitham equations in the framework of the bad JM equation are derived by finite-gap integration approach. The degeneration of the one-phase periodic solution along with the genus-one Whitham equation are analyzed by taking the two sides limits of the modulus m of the Jacobi elliptic functions. The basic rarefaction wave patterns and dispersive shock wave patterns are proposed analytically and graphically, and then the complete classification of solutions and the all possible waveforms evolving from discontinuous initial values in the bad JM equation are established. In the results, various patterns of emergent nonlinear waves that appear to be new and are being detected for the first time.

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Gastric metastasis of small cell lung carcinoma:Three case reports and review of literature

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World Journal of Gastroenterology 2024年第31期30卷 3717-3725页

作者： shan Yang qing-Yun He qing-Jing Zhao Han-Tao Yang Zheng-Yi Yang Wen-Yi Che Hua-Mei Li Hui-Chao Wu Department of Gastroenterology The Affiliated Hospital of Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina Department of Gastroenterology Guizhou Hospital of The First Affiliated HospitalSun Yat-sen UniversityGuiyang 550000Guizhou ProvinceChina Department of Gastroenterology Zhejiang Provincial People's Hospital Bijie HospitalBijie 551700Guizhou ProvinceChina Department of Gastroenterology Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina

BACKGROUND Small cell lung carcinoma(SCLC)is highly susceptible to metastasis in the early stages of the ***,the stomach is an uncommon site of metastasis in SCLC,and only a few cases of this type of metastasis have been ***,SCLC gastric metastases have not been systematically characterized and are easily missed and *** SUMMARY We report three cases of gastric metastasis from SCLC in this *** first patient presented primarily with cough,hemoptysis,and epigastric *** other two patients presented primarily with abdominal discomfort,epigastric distension,and *** patients underwent gastroscopy and imaging ***,the immunohistochemical results of the lesions in three patients were suggestive of small cell ***,the three patients were diagnosed with gastric metastasis of SCLC through a comprehensive *** three patients did not receive appropriate treatment and died within a short *** Here,we focused on summarizing the characteristics of gastric metastasis of SCLC to enhance clinicians'understanding of this disease.

关键词： Small cell lung cancer Gastric neoplasms Neoplasm metastasis Diagnosis Case report

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基于DTCWT和CSP的脑电信号特征提取

大连理工大学学报 2016年第1期56卷 70-76页

作者：佘青山陈希豪席旭刚张启忠杭州电子科技大学智能控制与机器人研究所浙江杭州310018

针对运动想象脑电信号中存在很多与运动想象无关的频率信号和共空间模式特征提取方法缺少频率信息处理的问题,提出了一种双树复小波变换与共空间模式相结合的特征提取方法.该方法首先选取C3、Cz、C4 3个通道的脑电信号进行上采样,并利... 详细信息

针对运动想象脑电信号中存在很多与运动想象无关的频率信号和共空间模式特征提取方法缺少频率信息处理的问题,提出了一种双树复小波变换与共空间模式相结合的特征提取方法.该方法首先选取C3、Cz、C4 3个通道的脑电信号进行上采样,并利用双树复小波变换多尺度分解,获取适当的频段并在相应尺度下进行信号重构;然后将各频段的三通道重构信号联合输入到空间滤波器以得到所需的六维特征向量;最后利用支持向量机来完成两类运动想象任务的分类.采用BCI CompetitionⅣ提供的Dataset 1数据进行实验验证,与CSP、FBCSP、WPD-CSP方法进行比较,7名受试者的训练数据平均分类正确率可达到96.0%,测试数据平均分类正确率达到86.7%.实验结果表明了所提方法的有效性.

关键词：脑-机接口运动想象双树复小波变换共空间模式

Rational design multi-color-emissive chemiluminescent carbon nanodots in a single solvothermal reaction

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Nano Research 2024年第6期17卷 4651-4660页

作者： Guang-Song Zheng Cheng-Long shen Yuan Deng Kai-Kai Liu Jin-Hao Zang Lin Dong qing Lou Chong-Xin shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Recently,the chemiluminescence(CL)induced by carbon nanodots(CDs)has intrigued researchers’extensive interests in various applications due to its special light emission ***,the difficulty of synthesizing chemiluminescent CDs with full-spectrum emission severely hinders the further regulation of the CL emission ***,the multi-color-emissive chemiluminescent CDs are rational designed and further synthesized by regulating the sp2-hybrid core and sp3-hybrid surface from the citrate-ammonia molecular in a single solvothermal *** experimental characterizations and density functional theory calculations reveal that the higher temperature can promote the crosslinking polymerization/carbonization of carbon core and the higher protonation of solvent can determine the core size of final CDs,resulting in the variant CL emission from molecular-,crosslinking-and ***,the CL emission of the CDs can be further synthesized by tuning the luminescence chromophores in the formation process via regulating the temperature and solvent,enabling the applications of the CL CDs in illumination and information *** study paves a new technology to understand the luminescence of CDs and affords an industry translational potential over traditional chemiluminescent molecular.

关键词： carbon nanodots chemiluminescence regulation energy level alignment mechanism

Preparation and Structure-Property Regulation Mechanism of Reversible Thermochromic Polydiacetylene

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Chinese Journal of Polymer Science 2024年第8期42卷 1111-1121页

作者： Zhi-qing Ge Shuo Yan Zu-Xiong Pan shan Lei Xuan-Zhi Mao Chu Zhao Mo-Zhen Wang Xue-Wu Ge Key Laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Marshall Laboratory of Biomedical Engineering International Cancer CenterLaboratory of Evolutionary Theranostics(LET)School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen 518055China shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The thermochromic mechanism and the structure-property regulation principle of reversible thermochromic polydiacetylene(PDA)materials have always been a challenging *** this work,a series of diacetylene monomers(m-PCDA)containing phenyl and amide or carboxyl groups were synthesized from 10,12-pentacosadiynoic acid(PCDA)through the esterification or amidation *** effects of the number and the distribution of the functional groups in m-PCDA molecules on their solid-state polymerization capability,and the thermochromic mechanism of their corresponding polymers(m-PDA)were investigated and discussed in *** results show that the m-PCDA monomers containing both benzene ring and groups that can form hydrogen bonding interactions have strong intermolecular interaction,and are easy to carry out the solid phase polymerization under 254-nm UV irradiation to obtain the corresponding new thermochromic m-PDA *** thermochromic behavior of m-PDA depends on its melting *** initial color-change temperature(blue to red)is determined by the onset melting tem perature,and the temperature range in which reversible color recovery can be achieved by repeat heating-cooling treatment is determined by its melting *** to the proposed thermochromic mechanism of PDA,various new PDA materials with precise thermochromic temperatu res and reversible thermochromic temperature ra nges can be designed and synthesized through the appropriate introduction of benzene ring and groups that can form hydrogen bonding interactions into the molecular structure of linear diacetylene *** work provides a perspective to the precise molecular structure design and the property regulation of the reversible thermochromic PDA materials.

关键词： Polydiacetylene Thermochromism Hydrogen bonding Chemical modification

基于MobileNetV3与ST-SRU的危险驾驶姿态识别

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控制与决策 2022年第5期37卷 1320-1328页

作者：赵俊男佘青山穆高原吴秋轩席旭刚杭州电子科技大学自动化学院杭州310018

针对危险驾驶行为引起的交通安全事故频发的现状,提出一种基于MobileNetV3和ST-SRU的危险驾驶姿态识别系统.首先,修改MobileNetV3的网络结构使其适用于人体姿态估计任务,输出关节点的热力图和偏移量图,用来估计J个关节点的二维坐标位置... 详细信息

针对危险驾驶行为引起的交通安全事故频发的现状,提出一种基于MobileNetV3和ST-SRU的危险驾驶姿态识别系统.首先,修改MobileNetV3的网络结构使其适用于人体姿态估计任务,输出关节点的热力图和偏移量图,用来估计J个关节点的二维坐标位置;其次,定义ST-SRU骨架动作识别算法,利用动作的骨架序列数据对动作进行分类.实验结果表明:MobileNetV3姿态估计算法在自建的AI Challenger上肢姿态数据集上测得PCP值(percentage correct parts)达到95.6%,测试1000次用时仅为5.03 s;利用自建的危险驾驶行为数据集将训练好的姿态估计和动作识别模型移植到嵌入式平台,实现了实时的危险驾驶姿态识别系统.

关键词： MobileNetV3 人体姿态估计骨架动作识别 ST-SRU 危险驾驶姿态识别