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基于数据驱动的多卷料张力协同控制系统

控制与决策 2025年第3期40卷 909-917页

作者：庞浩杜钦君徐东祥吴育桐马炳图山东理工大学电气与电子工程学院国网山东超高压公司淄博市产品质量检验研究院

三电机卷绕系统是一个强耦合非线性时变系统,存在卷轴半径、转动惯量以及摩擦系数等时变参数,导致张力协同控制精度较低.为了提高卷绕系统模型准确度,实时优化张力协同控制系统的动态性能,提出一种基于改进鲸鱼算法优化的多核最小二乘... 详细信息

三电机卷绕系统是一个强耦合非线性时变系统,存在卷轴半径、转动惯量以及摩擦系数等时变参数,导致张力协同控制精度较低.为了提高卷绕系统模型准确度,实时优化张力协同控制系统的动态性能,提出一种基于改进鲸鱼算法优化的多核最小二乘支持向量机回归(multi-kernel least squares support vector regression prediction model based on an improved whale algorithm optimization, WOA-M-LSSVR)预测模型和基于纵横交叉优化算法(crisscross optimization algorithm, CSO)优化的模型预测张力协同控制系统.根据最小二乘支持向量机回归原理建立多核LSSVR回归模型,并使用改进的自适应鲸鱼算法进行离线优化,得到系统预测模型;根据建立的预测模型,构建自适应更新的模型预测控制器,引入纵横交叉优化算法实现优化求解,最大程度避免了求解陷入局部最优的情况,提高了张力控制系统的动态性能.通过仿真和实验分析,验证了所设计的张力协同控制系统具有良好的动态性能和鲁棒性.

关键词：卷绕系统张力控制模型预测控制器最小二乘支持向量机鲸鱼算法

Middle Devonian-Tournaisian rocks and biota on Hainan Island,South China

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Science China Earth Sciences 2013年第11期56卷 1934-1941页

作者： ZHANG RenJie YAO HuaZhou WANG JianXiong tu bing Wuhan Institute of Geology and Mineral Resources China Geological Survey

On the basis of new paleontological data,the sequence and distributions of the Middle Devonian-Tournaisian rocks on Hainan Island have been sorted out for the first *** Devonian rocks include the Middle Devonian Jinbo Formation and the Upper Devonian Changjiang Formation,which are distributed in northwestern Hainan *** Jinbo Formation is represented by631 m of littoral facies deposits,and was intruded by the Yanshanian granite in the *** presence of chitinozoans Eisenackitina caster,Funsochitina pilosa,and Lagenochitina amottensis indicates the Givetian in *** Changjiang Formation is made up of 140 m of neritic facies rocks,and contains the Famennian conodonts Palmatolepis gracilis sigmoidalis,Polygnathus germanus,and corals Cystophrentis *** Devonian-Tournaisian transition beds,the lower part of the Jishi Formation,are composed of 61–129 m sandstone and siltstone,with gastropods Euomphalus *** brachiopods,and marked by conglomerate with the underlying Devonian *** middle-upper part of the Tournaisian Jishi Formation consists of 100–251 m clastic and carbonate rocks,containing abundant corals Pseudoularinia irregularis,conodonts Siphonodella isosticha,trilobites Weberiphillipsia linguiformis,and *** the basis of the occurrence of Xinanosprifer flabellum and Homotoma sp.,the Nanhao Formation in southern Hainan Island is now regarded as the Lower Silurian,instead of the previously designated Lower *** is confirmed that no Carboniferous rocks occurred in the area south to the Gancheng-Wanning Fault.

关键词： Devonian-Tournaisian rocks biota Hainan Island China

Transcriptome approach to understand the potential mechanisms of resistant and susceptible alfalfa(Medicago sativa L.) cultivars in response to aphid feeding

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Journal of Integrative Agriculture 2018年第11期17卷 2518-2527页

作者： tu Xiong-bing ZHAO Hai-long ZHANG Ze-hua State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences College of Plant Protection Shenyang Agricultural University

Plant breeding for resistance to agricultural pests is an essential element in the development of integrated crop management systems, however, the molecular and genetic mechanisms underlying resistance are poorly understood. In this pilot study, we conducted a transcriptomic analysis of a resistant （R） and susceptible （S） variety of alfalfa, with （＋A） or without （-A） aphids （totally four treatments）. We used the resistant cultivar Zhongmu t and the susceptible cultivar Soca. A total of 3 549 mRNAs were differentially expressed, of which 1 738 up-regulated and 1 307 down-regulated genes were identified in S＋A/S-A plants, while 543 up-regulated and 331 down-regulated genes were identified in the R＋A/R-A plants. KEGG analysis mapped 112 and 546 differentially expressed genes to 8 and 17 substantially enriched pathways for Zhongmu 1 and Soca, respectively. Six shared pathways were linked to plant resistance traits, including phenylpropanoid biosynthesis associated with salicylic acid synthesis, and linoleic acid metabolism associated with both jasmonic acid and flavonoid biosynthesis. Ultimately, we proposed a preliminary regulatory mechanism of alfalfa cultivar resistance response to aphids feeding based on transcriptome analyses and published documents.

关键词： alfalfa cultivar resistance aphids transcriptomic molecular mechanism

Effects of thermal treatment on physical and mechanical characteristics of coal rock

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Journal of Central South University 2016年第9期23卷 2336-2345页

作者： YIN tu-bing WANG Pin LI Xi-bing SHU Rong-hua YE Zhou-yuan School of Resources and Safety Engineering Central South University Changsha 410083 China School of Energy and Safety Engineering Hunan University of Science and Technology Xiangtan 411201 China

To study the physical and mechanical properties of coal rock after treatment at different temperatures under impact loading, dynamic compression experiments were conducted by using a split Hopkinson pressure bar(SHPB). The stress–strain curves of specimens under impact loading were obtained, and then four indexes affected by temperature were analyzed in the experiment: the longitudinal wave velocity, elastic modulus, peak stress and peak strain. Among these indexes, the elastic modulus was utilized to express the specimens' damage characteristics. The results show that the stress–strain curves under impact loading lack the stage of micro-fissure closure and the slope of the elastic deformation stage is higher than that under static loading. Due to the dynamic loading effect, the peak stress increases while peak strain decreases. The dynamic mechanical properties of coal rock show obvious temperature effects. The longitudinal wave velocity, elastic modulus and peak stress all decrease to different extents with increasing temperature, while the peak strain increases continuously. During the whole heating process, the thermal damage value continues to increase linearly, which indicates that the internal structure of coal rock is gradually damaged by high temperature.

关键词： rock mechanical property split Hopkinson pressure bar (SHPB) high temperature coal rock dynamic mechanical property

Including predator presence in a refined model for assessing resistance of alfalfa cultivar to aphids

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Journal of Integrative Agriculture 2018年第2期17卷 397-405页

作者： tu Xiong-bing FAN Yao-li Mark McNeill ZHANG Ze-hua State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences AgResearch

The aphid quantity ratio（AQR） is defined as the number of aphids on each cultivar divided by the number of aphids on all cultivars. AQR is based on the correlation between aphid populations and their host plants and is an important tool that has been utilized in evaluating Medicago sativa（alfalfa） cultivar resistance to aphids. However, assessment of alfalfa resistance to aphids can be confused by the presence of aphid predators, causing the assessment of plant resistance to aphids to be based on incorrect aphid population data. To refine the AQR and account for the effect of predators on aphid population assessments, we introduced a parameter ‘α＇, corresponding to the predator quantity ratio, and used αAQR as the ratio to quantify aphid populations. Populations of both aphids（4 species） and their predators（12 species） occurring in 28 M. sativa cultivars were sampled over two years at a research station near Cangzhou, Hebei Province, China. Results showed that the most suitable evaluation period was from May to June, as the aphid population was stable during this period. Compared with the AQR method, the predator population numbers based on the αAQR had a significant inverse relationship with aphid population numbers and the 28 cultivars were clustered into three classes： the resistant class, tolerant class, and susceptible class. In addition, 17 cultivars were reassigned when evaluated using αAQR. All numerical values calculated by αAQR were displayed as a Gaussian distribution, which showed that the 28 cultivars could be clustered into nine groups using a median value（±SE） of 1±0.1. Hence, ongoing alfalfa breeding trials will be assessed using the αAQR to establish a robust system that includes agronomic performance parameters in order to generalize the new method for further studies.

关键词： aphid quantity ratio(AQR) model alfalfa cultivar resistance to aphids natural enemy

Preparation of Spherical Microfine Silicon Powder

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 440-442页

作者： SHENG Yong ZOU Jun LI bing tu Mingjing College of Material Science and Engineering Sichuan University Chengdu 610065 China

Under certain conditions of proper temperature and pH value, sodium silicate was hydrolyzed in liquid ammonia chloride, and spherical microfine SiO2 powder in micrometer-size was prepared. In this experiment, the relationship between needed time and proper pH value, temperature, density of the solution, and its current capacity were found .The optimum conditions are pH 8.5, 70 ~C, and the concentration of sodium silicate is 0.6 mol/L for the density of the solution. The structure of spherical microfine silicon was characterized by SEM and XRD.

关键词： SiO2 powder spherical-structure

Structural form selection of the high-rise buildingwith the improved BP neural network

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High Technology Letters 2020年第1期26卷 92-97页

作者： Zhao Guangzhe Yang Hanting tu bing Zhou Meiling Zhou Chengle School of Electrical and Information Engineering Beijing University of Civil Engineeringand ArchitectureBeijing 100044P.R.China College of Information and Communication Engineering Hunan Institute of Science and TechnologyYueyang 414000P.R.China

As civil engineering technology development,the structural form selection is more and more critical in design of high-rise ***,structural form selection involves expertise knowledge and changes with the environment which makes the task *** approach utilizing improved back propagation(BP)neural network optimized by the Levenberg-Marquardt(L-M)algorithm is proposed to extract the main controlling factors of structural form ***,an intelligent expert system with artificial neural network is constructed to design high-rise buildings structure *** experiment tests the model in 15 well-known architecture samples and get the prediction accuracy of 93.33%.The results show that the method is feasible and can help designers select the appropriate structural form.

关键词： back propagation(BP)neural network high-rise building structural form selection Levenberg-Marquardt(L-M)algorithm

Laparoscopic liver resection for hepatocellular carcinoma complicated with significant portal hypertension:A propensity score-matched survival analysis

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Hepatobiliary & Pancreatic Diseases International 2023年第4期22卷 358-365页

作者： Zhang-You Guo Yuan Hong bing tu Yao Cheng Xiao-Mei Wang Department of Minimally Invasive Interventional Therapy Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityYunnan Cancer CenterKunming 650118China Medical Laboratory The First Affiliated Hospital of Kunming Medical UniversityInstitute of Experimental Diagnostics of Yunnan ProvinceKey Laboratory of Laboratory Medicine of Yunnan ProvinceKunming 650032China Department of Hepatobiliary Surgery The Second Affiliated HospitalChongqing Medical UniversityChongqing 400010China

Background: Significant portal hypertension(SPH) is a relative contraindication for patients with resectable hepatocellular carcinoma(HCC). However, increasing evidence indicates that liver resection is feasible for HCC patients with SPH. Methods: HCC patients with cirrhosis who underwent laparoscopic liver resection(LLR) in two centers from January 2013 to April 2018 were included. Surgical and survival outcomes were analyzed to explore potential prognostic factors. Propensity score matching(PSM) analysis was performed to minimize bias. Results: A total of 165 patients were divided into two groups based on the presence(SPH, n = 76) or absence(non-SPH, n = 89) of SPH. Patients in the SPH group had longer operative time, more blood loss, and more advanced TNM stage than patients in the non-SPH group( P 0.05). After PSM, alpha-fetoprotein(AFP) ≥ 400 μg/L [hazard ratio(HR) = 4.71, 95% confidence interval(CI): 2.69-8.25], ascites(HR = 2.18, 95% CI: 1.30-3.66), American Society of Anesthesiologists(ASA) classification(Ⅲ vs. Ⅱ)(HR = 2.13, 95% CI: 1.11-4.07) and tumor diameter > 5 cm(HR = 3.91, 95% CI: 2.02-7.56) independently predicted worse OS. Conclusions: LLR for patients with HCC complicated with SPH appears feasible at the price of increasing operative time and blood loss. AFP, ascites, ASA classification and tumor diameter may predict the prognosis of HCC complicat

关键词： Hepatocellular carcinoma Significant portal hypertension Laparoscopic liver resection Propensity score matching analysis

Spectral‐spatial sequence characteristics‐based convolutional transformer for hyperspectral change detection

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CAAI Transactions on Intelligence Technology 2023年第4期8卷 1237-1257页

作者： Chengle Zhou Qian Shi Da He bing tu Haoyang Li Antonio Plaza School of Geography and Planning Sun Yat‐sen UniversityGuangzhouChina Guangdong Provincial Key Laboratory for Urbanization and GeoSimulation Sun Yat‐sen UniversityGuangzhouChina Institute of Optics and Electronics Nanjing University of Information Science and TechnologyNanjingChina Hyperspectral Computing Laboratory Escuela PolitecnicaUniversity of ExtremaduraCaceresSpain

Recently,ground coverings change detection(CD)driven by bitemporal hyperspectral images(HSIs)has become a hot topic in the remote sensing *** are two challenges in the HSI‐CD task:(1)attribute feature representation of pixel pairs and(2)feature extraction of attribute patterns of pixel *** solve the above problems,a novel spectral‐spatial sequence characteristics‐based convolutional transformer(S3C‐CT)method is proposed for the HSI‐CD *** the designed method,firstly,an eigenvalue extrema‐based band selection strategy is introduced to pick up spectral information with salient attribute ***,a 3D tensor with spectral‐spatial sequence characteristics is proposed to represent the attribute features of pixel pairs in the bitemporal ***,a fusion framework of the convolutional neural network(CNN)and Transformer encoder(TE)is designed to extract high‐order sequence semantic features,taking into account both local context information and global sequence ***,a spatial‐spectral attention mechanism is employed to prevent information reduction and enhance dimensional interactivity between the CNN and ***,the binary change map is determined according to the fully‐connected *** results on real HSI datasets indicated that the proposed S3C‐CT method outperforms other well‐known and state‐of‐the‐art detection approaches in terms of detection performance.

关键词： change detection imageanalysis