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Utilizing spatio-temporal feature fusion in videos for detecting the fluidity of coal water slurry

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International Journal of Mining Science and Technology 2024年第11期34卷 1587-1597页

作者： Meijie Sun ziqi Lv Zhiqiang xu Haimei Lv Yanan Tu Weidong Wang School of Chemical&Environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China Inner Mongolia Research Institute China University of Mining&Technology(Beijing)Ordos 017001China State Key Laboratory of Media Convergence Production Technology and Systems Beijing 100803China

The fluidity of coal-water slurry(CWS)is crucial for various industrial applications such as long-distance transportation,gasification,and ***,there is currently a lack of rapid and accurate detection methods for assessing CWS *** paper proposed a method for analyzing the fluidity using videos of CWS dripping *** integrating the temporal and spatial features of each frame in the video,a multi-cascade classifier for CWS fluidity is *** classifier distinguishes between four levels(A,B,C,and D)based on the quality of *** preliminary classification of A and D is achieved through feature engineering and the XGBoost ***,convolutional neural networks(CNN)and long short-term memory(LSTM)are utilized to further differentiate between the B and C categories which are prone to ***,through detailed comparative experiments,the paper demonstrates the step-by-step design process of the proposed method and the superiority of the final *** proposed method achieves an accuracy rate of over 90%in determining the fluidity of CWS,serving as a technical reference for future industrial applications.

关键词： Coal water slurry Spatio-temporal feature CNN-LSTM Video classification Machine vision

姜黄素促进炎症微环境下大鼠骨髓间充质干细胞骨向分化

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滨州医学院学报 2021年第1期44卷 14-17,56页

作者：董春燕卢永超刘海英徐子琪张韶君滨州医学院口腔医学院山东烟台264003 千佛山医院口腔科山东济南250001

目的研究姜黄素对炎症微环境下大鼠骨髓间充质干细胞(BMSCs)成骨分化的影响。方法分离、培养大鼠BMSCs,以10 ng/mL的肿瘤坏死因子α(TNF-α)诱发细胞炎症反应,用不同浓度姜黄素处理细胞,CCK-8检测细胞增殖以便筛选出实验所需姜黄素适宜... 详细信息

目的研究姜黄素对炎症微环境下大鼠骨髓间充质干细胞(BMSCs)成骨分化的影响。方法分离、培养大鼠BMSCs,以10 ng/mL的肿瘤坏死因子α(TNF-α)诱发细胞炎症反应,用不同浓度姜黄素处理细胞,CCK-8检测细胞增殖以便筛选出实验所需姜黄素适宜浓度;实验分组为正常组、炎症组和炎症+姜黄素组;碱性磷酸酶(ALP)和茜素红染色检测成骨分化,实时荧光定量PCR检测骨涎蛋白(BSP)、Runt相关转录因子2(Runx2)的表达。结果成功分离培养BMSCs;低浓度的姜黄素无细胞毒性,1μmol/L为适宜浓度;炎症降低大鼠BMSCs成骨相关基因BSP、Runx2表达,且ALP染色变浅、矿化结节减少;而姜黄素则可以逆转这种趋势,促进炎症状态下成骨相关基因BSP、Runx2的表达(P<0.05),较炎症组ALP染色加深,矿化结节增多。结论姜黄素可以促进炎症微环境下BMSCs成骨分化。

关键词：姜黄素炎症骨髓间充质干细胞成骨分化

Design of a Lightweight Force-Feedback Glove with a Large Workspace

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Engineering 2018年第6期4卷 869-880页

作者： Yukai Zheng Dangxiao Wang ziqi Wang Yu Zhang Yuru Zhang Weiliang xu State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100083China Department of Mechanical Engineering University of AucklandAuckland 1142New Zealand

A wearable force-feedback glove is a promising way to enhance the immersive sensation when a user interacts with virtual objects in virtual reality *** challenges for such a glove include allowing a large fingertip workspace,providing a desired force sensation when simulating both free-and constrained-space interactions,and ensuring a lightweight *** this paper,we present a forcefeedback glove using a pneumatically actuated mechanism mounted on the dorsal side of the user’s *** means of a triple kinematic paired link with a curved sliding slot,a hybrid cam-linkage mechanism is proposed to transmit the resistance from the pneumatic piston rod to the *** order to obtain a large normal component of the feedback force on the user’s fingertip,the profile of the sliding slot was synthesized through an analysis of the force equilibrium on the triple kinematic paired link.A prototype five-fingered glove with a mass of 245 g was developed,and a wearable force-measurement system was constructed to permit the quantitative evaluation of the interaction performance in both free and constrained *** experimental results confirm that the glove can achieve an average resistance of less than 0.1 N in free-space simulation and a maximum fingertip force of 4 N in constrained-space *** experiment further confirms that this glove permits the finger to move freely to simulate typical grasping gestures.

关键词： Force-feedback glove Lightweight Large workspace Pneumatic Virtual reality

Long-term stable silver nanowire transparent composite as bottom electrode for perovskite solar cells

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Nano Research 2018年第4期11卷 1998-2011页

作者： Yunxia Jin Yong Sun Kaiqing Wang Yani Chen ziqi Liang Yuxi xu Fei Xiao Department of Materials Science Fudan University 220 Handan Road Shanghai 200433 China Department of Macromolecular Science Fudan University 220 Handan Road Shanghai 200433 China

As the most promising alternative to traditional indium tin oxide （ITO）, silver nanowire （AgNW） composite transparent electrodes with improved stabilities compared with that of the pristine AgNWs networks have been demonstrated in various devices. However, a stable AgNW/polymer composite as the bottom electrode for perovskite solar cells has not yet been reported. Here, a long-term stable, smooth AgNW composite with an antioxidant-modified chitosan polymer was developed. The modified polymer can effectively protect pristine AgNWs from side reactions with perovskite, whereas it does not block the carrier drift through the interface of the insulating polymer. The as-prepared AgNW/polymer composite electrode exhibited a root mean square roughness below 10 nm at a scan size of 50 μm × 50 μm, and its original sheet resistance did not change obviously after aging at 85 ℃ for 40 days in air. As a result, the perovskite solar cell employing the composite as the bottom electrode yielded a power conversion efficiency of 7.9%, which corresponds to nearly 75% of that of the reference device with an ITO electrode.

关键词： silver nanowire ascorbic-acid-modified chitosan transparent composite electrode stability perovskite solar cell

不同林草治沙模式对盐碱沙地沉积物粒度特征的影响

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中国水土保持 2024年第3期 29-33页

作者：张瑜徐子棋陈光明张志军杨献坤崔斌王大中芦贵君吉林省水土保持科学研究院吉林长春130033

为探究吉林省西部盐碱沙地不同林草措施的防风固沙效果,以樟子松(Pinus sylvestris ***)+沙棘(Hippophae rhamnoides)+沙打旺(Astragalus laxmannii)(模式1)和樟子松+蒙桑(Morus mongolica)+沙打旺(模式2)两种治沙模式为研究对象开展野外试验,分析其植被恢复状况和沉积物粒度特征,结果表明:(1)模式1和模式2的乔灌草生长状况良好,第4年木本存活率达到74.0%~88.0%,总覆盖度分别达到86.6%和76.5%,具有较好的植被改善作用;(2)模式1、模式2均能够改变沉积物粒度特征,减少黏粒、粉粒、极细砂的风蚀量,且模式1的作用优于模式2;(3)该区域1.17~<157.90μm为环境敏感细组分,157.90~<630.50μm为环境敏感粗组分;(4)两种林草治沙模式均能够显著改变盐碱沙地下垫面风动力条件,削弱风蚀作用,使风蚀带走的细组分减少,且模式1的改善效果优于模式2。综上,模式1和模式2均对吉林省西部风蚀沉积特征有显著影响,具有较好的防风固沙效益,适宜在半干旱区沙地推广。

关键词：林草治沙模式樟子松沙棘蒙桑风沙沉积物粒度特征盐碱沙地吉林省

Identification of Rice Leaf Disease Using Improved ShuffleNet V2

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Computers, Materials & Continua 2023年第5期75卷 4501-4517页

作者： Yang Zhou Chunjiao Fu Yuting Zhai Jian Li ziqi Jin Yanlei xu College of Information and Technology Jilin Agricultural UniversityChangchun130118China

Accurate identification of rice diseases is crucial for controlling diseases and improving rice *** improve the classification accuracy of rice diseases,this paper proposed a classification and identification method based on an improved ShuffleNet V2(GE-ShuffleNet)***,the Ghost module is used to replace the 1×1 convolution in the two basic unit modules of ShuffleNet V2,and the unimportant 1×1 convolution is deleted from the two basic unit modules of ShuffleNet *** Hardswish activation function is applied to replace the ReLU activation function to improve the identification accuracy of the ***,an effective channel attention(ECA)module is added to the network to avoid dimension reduction,and the correlation between channels is effectively extracted through 1D ***,L2 regularization is introduced to fine-tune the training parameters during training to prevent ***,the considerable experimental and numerical results proved the advantages of our proposed model in terms of model size,floating-point operation per second(FLOPs),and parameters(Params).Especially in the case of smaller model size(5.879 M),the identification accuracy of GE-ShuffleNet(96.6%)is higher than that of ShuffleNet V2(94.4%),MobileNet V2(93.7%),AlexNet(79.1%),Swim Transformer(88.1%),EfficientNet V2(89.7%),VGG16(81.9%),GhostNet(89.3%)and ResNet50(92.5%).

关键词： Deep learning convolution neural network rice diseases lightweight network

CVT-Based Asynchronous BCI for Brain-Controlled Robot Navigation

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Cyborg and Bionic Systems 2023年第1期4卷 318-329页

作者： Mengfan Li Ran Wei ziqi Zhang Pengfei Zhang Guizhi xu Wenzhe Liao State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Health Sciences and Biomedical EngineeringHebei University of Technology300132 TianjinChina Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering 300132 TianjinChina Tianjin Key Laboratory of Bioelectromagnetic Technology and Intelligent Health 300132 TianjinChina School of Artificial Intelligence Hebei University of Technology300132 TianjinChina

Brain-computer interface(BCI)is a typical direction of integration of human intelligence and robot *** control is an essential form of combining human and robot agents in a common task,but still faces a lack of freedom for the human *** paper proposes a Centroidal Voronoi Tessellation(CVT)-based road segmentation approach for brain-controlled robot navigation by means of asynchronous *** electromyogram-based asynchronous mechanism is introduced into the BCI system for self-paced control.A novel CVT-based road segmentation method is provided to generate optional navigation goals in the road area for arbitrary goal *** event-related potential of the BCI is designed for target selection to communicate with the *** robot has an autonomous navigation function to reach the human selected goals.A comparison experiment in the single-step control pattern is executed to verify the effectiveness of the CVT-based asynchronous(CVT-A)BCI *** subjects participated in the experiment,and they were instructed to control the robot to navigate toward a destination with obstacle avoidance *** results show that the CVT-A BCI system can shorten the task duration,decrease the command times,and optimize navigation path,compared with the single-step ***,this shared control mechanism of the CVT-A BCI system contributes to the promotion of human and robot agent integration control in unstructured environments.

关键词： robot agent Robot

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艾纳香内生真菌抗细菌和炭疽菌的活性研究

中国农学通报 2021年第23期37卷 38-44页

作者：元超舒雪纯张影波王凯谢小丽徐子琪袁媛中国热带农业科学院热带作物品种资源研究所/海南省艾纳香工程技术研究中心海南儋州571737 海南大学林学院海口570228 山东第一医科大学第一附属医院济南250014 广东药科大学生命科学与生物制药学院广州510006

为获得丰富的艾纳香内生真菌资源,筛选出抗性生防菌株,用于活性次生代谢产物的发现,通过水琼脂法对海南产艾纳香进行内生真菌分离,通过ITS序列分析,对其进行鉴定和分析。采用滤纸片法评价内生真菌发酵产物对细菌的抑制活性,采用平板对... 详细信息

为获得丰富的艾纳香内生真菌资源,筛选出抗性生防菌株,用于活性次生代谢产物的发现,通过水琼脂法对海南产艾纳香进行内生真菌分离,通过ITS序列分析,对其进行鉴定和分析。采用滤纸片法评价内生真菌发酵产物对细菌的抑制活性,采用平板对峙培养法评价艾纳香内生真菌对植物炭疽菌的拮抗作用。本研究共分离鉴定出191株内生真菌,分属于27属,45种,其中优势菌属为Diaporthe、Paraphoma、Ectophoma、Penicillium、Talaromyces、Hypoxylon、Phomopsis、Colletotrichum和Fusarium。抗细菌活性结果显示,Clonostachys、Fusarium和Diapothe属活性较强。抗炭疽病菌试验显示,Talaromyces、Ectophoma和Penicillium属活性较强。本研究初步探讨了海南产艾纳香内生真菌种类的多样性,并首次对其进行了抗病原菌活性筛查,获得的活性菌株可作为微生物源菌剂开发的重要材料。

关键词：艾纳香内生真菌抗菌活性抗炭疽菌活性微生物菌剂

Tuning Solid Interfaces via Varying Electrolyte Distributions Enables High-Performance Solid-State Batteries

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Energy & Environmental Materials 2023年第2期6卷 26-33页

作者： Linfeng Peng Chuang Yu ziqi Zhang Ruonan xu Mengjun Sun Long Zhang Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430000China School of Physics Huazhong University of Science and TechnologyWuhan 430000China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430000China

Solid/solid interface is the major challenge for high-performance solid-state *** electrolytes(SEs)play a crucial role in the fabrication of effective interfaces in solid-state ***,the electrolyte distribution with varied particle sizes is tuned to construct solid-state batteries with excellent performance at different operating ***-state batteries with the configuration S/L(small-sized SE in composite cathode and large-sized SE in electrolyte layer)show the best performance at room temperature(168 mA h g^(−1) at 0.2 C,retention of 99%,100 cycles)and−20°C(89 mA h g^(−1) at 0.05 C),while the configuration S/S displays better performance at elevated *** superior performance of S/L battery is associated with faster lithium-ion dynamics due to the better solid/solid interface between active materials and ***,the inferior performance at 60℃is caused by the formation of voids and cracks in the electrolyte layer during *** contrast,the S/S battery delivers superior performance at elevated operating temperature because of the integrated *** work confirms that tailoring electrolyte size has significant effect on fabricating all-climate solid-state batteries.

关键词： electrochemical performance lithium argyrodite operating temperature size distribution solid-state batteries