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Wind Speed Prediction Based on Improved VMD-BP-CNN-LSTM Model

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Journal of Power and Energy Engineering 2024年第1期12卷 29-43页

作者： Chaoming Shu bin qin Xin Wang College of Railway Transportation Hunan University of Technology Zhuzhou China College of Electrical and Information Engineering Hunan University of Technology Zhuzhou China

Amid the randomness and volatility of wind speed, an improved VMD-BP-CNN-LSTM model for short-term wind speed prediction was proposed to assist in power system planning and operation in this paper. Firstly, the wind speed time series data was processed using Variational Mode Decomposition (VMD) to obtain multiple frequency components. Then, each individual frequency component was channeled into a combined prediction framework consisting of BP neural network (BPNN), Convolutional Neural Network (CNN) and Long Short-Term Memory Network (LSTM) after the execution of differential and normalization operations. Thereafter, the predictive outputs for each component underwent integration through a fully-connected neural architecture for data fusion processing, resulting in the final prediction. The VMD decomposition technique was introduced in a generalized CNN-LSTM prediction model;a BPNN model was utilized to predict high-frequency components obtained from VMD, and incorporated a fully connected neural network for data fusion of individual component predictions. Experimental results demonstrated that the proposed improved VMD-BP-CNN-LSTM model outperformed other combined prediction models in terms of prediction accuracy, providing a solid foundation for optimizing the safe operation of wind farms.

关键词： Wind Speed Forecast Long Short-Term Memory Network BP Neural Network Variational Mode Decomposition Data Fusion

The underlying mechanism of variety–water–nitrogen–stubble damage interactions on yield formation in ratoon rice with low stubble height under mechanized harvesting

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Journal of Integrative Agriculture 2024年第3期23卷 806-823页

作者： Jingnan Zou Ziqin Pang Zhou Li Chunlin Guo Hongmei Lin Zheng Li Hongfei Chen Jinwen Huang Ting Chen Hailong Xu bin qin Puleng Letuma Weiwei Lin Wenxiong Lin College of Life Sciences Fujian Agriculture and Forestry University(FAFU)/Fujian Key Laboratory for Agroecological Processes and Safety MonitoringFuzhou 350002China College of Agriculture FAFU/Fujian Key Laboratory for Crop Physiology and Molecular EcologyFuzhou 350002China Institute of Oceanography College of Geography and OceanographyMinjiang UniversityFuzhou 350108China Crop Science Department The National University of LesothoRoma 00100Lesotho The Agricultural Extension Station of Pucheng County Nanping 353400China

Agronomic measures are the key to promote the sustainable development of ratoon rice by reducing the damage from mechanical crushing to the residual stubble of the main crop, thereby mitigating the impact on axillary bud sprouting and yield formation in ratoon rice. This study used widely recommended conventional rice Jiafuzhan and hybrid rice Yongyou 2640 as the test materials to conduct a four-factor block design field experiment in a greenhouse of the experimental farm of Fujian Agricultural and Forestry University, China from 2018 to *** treatments included fertilization and no fertilization, alternate wetting and drying irrigation and continuous water flooding irrigation, and plots with and without artificial crushing damage on the rice stubble. At the same time, a 13C stable isotope in-situ detection technology was used to fertilize the pot experiment. The results showed significant interactions among varieties, water management, nitrogen application and stubble *** to the long-term water flooding treatment, the treatment with sequential application of nitrogen fertilizer coupled with moderate field drought for root-vigor and tiller promotion before and after harvesting of the main crop, significantly improved the effective tillers from low position nodes. This in turn increased the effective panicles per plant and grains per panicle by reducing the influence of artificial crushing damage on rice stubble and achieving a high yield of the regenerated rice. Furthermore, the partitioning of 13C assimilates to the residual stubble and its axillary buds were significantly improved at the mature stage of the main crop, while the translocation rate to roots and rhizosphere soil was reduced at the later growth stage of ratooning season rice. This was triggered by the metabolism of hormones and polyamines at the stem base regulated by the interaction of water and fertilizer at this time. We therefore suggest that to achieve a high yield of ratoon rice

关键词： mechanized harvesting ratoon rice rice stubble yield attributes

Characteristics of early gastric tumors with different differentiation and predictors of long-term outcomes after endoscopic submucosal dissection

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World Journal of Gastroenterology 2024年第14期30卷 1990-2005页

作者： Hong-Yi Zhu Jie Wu Yuan-Miao Zhang Fang-Lan Li Jin Yang bin qin Jiong Jiang Ning Zhu Meng-Yao Chen Bai-Cang Zou Department of Gastroenterology The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710004Shaanxi ProvinceChina Department of Pathology The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710004Shaanxi ProvinceChina Department of Gastroenterology Xianyang Hospital of Yan'an UniversityXianyang 712000Shaanxi ProvinceChina Department of Gastroenterology The First Hospital of Xi'anXi'an 710000Shaanxi ProvinceChina

BACKGROUND Gastric cancer is a common malignant tumor of the digestive tract,and endosco-pic submucosal dissection(ESD)is the preferred treatment for early-stage gastric *** analysis of the epidemiological characteristics of gastric mucosal tumors with different differentiation degrees and the influencing factors of long-term ESD efficacy may have certain significance for revealing the development of gastric cancer and *** To analyze the features of gastric mucosal tumors at different differentiation levels,and to explore the prognostic factors of *** We retrospectively studied 301 lesions in 285 patients at The Second Affiliated Hospital of Xi'an Jiaotong University from 2014 to 2021,according to the latest Japanese guidelines(sixth edition),and divided them into low-grade intrae-pithelial neoplasia(LGIN),high-grade intraepithelial neoplasia(HGIN),and computed tomography at 3,6 and 12 months after *** compared clinicopathologic characteristics,ESD efficacy,and complications with different degrees of differentiation,and analyzed the related factors associated with *** HGIN and differentiated carcinoma patients were significantly older compared with LGIN patients(P<0.001)and accounted for more 0-IIc(P<0.001),atrophic gastritis was common(P<0.001),and irregular microvascular patterns(IMVPs)and demarcation lines(DLs)were more obvious(P<0.001).There was more infiltration in the undifferentiated carcinoma tissue(P<0.001),more abnormal folds and poorer mucosal peristalsis(P<0.001),and more obvious IMVPs,irregular microsurface patterns and DLs(P<0.05)than in the LGIN and HGIN *** disease-free survival rates at 2,5,and 8 years after ESD were 95.0%,90.1%,and 86.9%,***-tiated lesions(HR 5.066),white moss(HR 7.187),incomplete resection(HR 3.658),and multiple primary cancers(HR 2.462)were significantly associated with poor *** Differentiations of gastric mucosal tumors have different epidemiological and

关键词： Gastric mucosal epithelial neoplasia Differentiated early gastric cancer Undifferentiated early gastric cancer Endoscopic submucosal dissection Long-term outcomes

Loss of monopolar spindle-binding protein 3B expression promotes colorectal cancer malignant behaviors by activation of target of rapamycin kinase/autophagy signaling

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World Journal of Gastroenterology 2024年第26期30卷 3229-3246页

作者： Juan Sun Jin-Xiu Zhang Meng-Shi Li Meng-bin qin Ruo-Xi Cheng qing-Ru Wu Qiu-Ling Chen Dan Yang Cun Liao Shi-Quan Liu Jie-An Huang Department of Gastroenterology The Second Affiliated Hospital of Guangxi Medical UniversityNanning 530007Guangxi Zhuang Autonomous RegionChina Department of Colorectal&Anal Surgery The First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina

BACKGROUND Monopolar spindle-binding protein 3B(MOB3B)functions as a signal transducer and altered MOB3B expression is associated with the development of human *** To investigate the role of MOB3B in colorectal cancer(CRC).METHODS This study collected 102 CRC tissue samples for immunohistochemical detection of MOB3B expression for association with CRC *** overexpression and knockdown of MOB3B expression were induced in CRC cell lines,changes in cell viability,migration,invasion,and gene expression were *** cell autophagy was detected using transmission electron microscopy,while nude mouse xenograft experiments were performed to confirm the in-vitro *** MOB3B expression was reduced in CRC vs normal tissues and loss of MOB3B expression was associated with poor CRC *** of MOB3B protein in vitro attenuated the cell viability as well as the migration and invasion capacities of CRC cells,whereas knockdown of MOB3B expression had the opposite effects in CRC *** the molecular level,microtubule-associated protein light chain 3 II/I expression was elevated,whereas the expression of matrix metalloproteinase(MMP)2,MMP9,sequestosome 1,and phosphorylated mechanistic target of rapamycin kinase(mTOR)was downregulated in MOB3B-overexpressing RKO *** contrast,the opposite results were observed in tumor cells with MOB3B *** nude mouse data confirmed these in-vitro findings,i.e.,MOB3B expression suppressed CRC cell xenograft growth,whereas knockdown of MOB3B expression promoted the growth of CRC cell *** Loss of MOB3B expression promotes CRC development and malignant behaviors,suggesting a potential tumor suppressive role of MOB3B in CRC by inhibition of mTOR/autophagy signaling.

关键词： Colorectal cancer Monopolar spindle-binding protein 3B Mechanistic target of rapamycin kinase Autophagy Prognosis

不同预载机制和过盈量下角接触球轴承的动力学特性

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航空动力学报 2024年第4期39卷 267-278页

作者：李震王青山王瑞华秦斌中南大学机电工程学院长沙410012 中南大学交通运输工程学院长沙410015

基于Hertz弹性接触理论和无滚道控制理论,建立了不同预载机制下五自由度角接触球轴承拟静力学分析模型,采用牛顿拉夫逊法对已建立的模型进行数值求解,探究预载机制和过盈量对角接触球轴承动力学特性的影响。通过将已建立模型求解接触角... 详细信息

基于Hertz弹性接触理论和无滚道控制理论,建立了不同预载机制下五自由度角接触球轴承拟静力学分析模型,采用牛顿拉夫逊法对已建立的模型进行数值求解,探究预载机制和过盈量对角接触球轴承动力学特性的影响。通过将已建立模型求解接触角和轴承刚度结果与已有文献结果进行对比,验证模型的有效性。分别探究了过盈量对内外圈装配压力和滚道接触变形量的影响以及过盈量和预载机制对轴承刚度的影响。结果表明:随过盈量增加,内外圈装配压力增加,初始接触角减小;随着过盈量增加,轴承径向刚度增加,轴向刚度和角刚度减小;与定压预紧相比,定位预紧能够提高轴承刚度;探究转速对接触变形和装配压力的影响,确定了松脱旋转速度约为40000 r/min。

关键词：过盈量预载机制牛顿拉夫逊轴承刚度接触角

直接甲醇燃料电池含氧空穴CaTiO_(3)阴极助催化剂研究

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电源技术 2024年第6期48卷 996-1002页

作者：霍鑫秦斌孙海中国科学院大连化学物理研究所辽宁大连116023 中国科学院大学北京100039

作为便携移动电源,直接甲醇燃料电池(DMFC)在高海拔、低氧浓度条件下的性能变化直接影响其实际应用效果。针对低氧浓度条件下,DMFC阴极极化损失增大问题,通过水热模板法合成CaTiO_(3)助催化剂,与商品Pt/C催化剂进行不同比例掺杂,对掺杂... 详细信息

作为便携移动电源,直接甲醇燃料电池(DMFC)在高海拔、低氧浓度条件下的性能变化直接影响其实际应用效果。针对低氧浓度条件下,DMFC阴极极化损失增大问题,通过水热模板法合成CaTiO_(3)助催化剂,与商品Pt/C催化剂进行不同比例掺杂,对掺杂催化剂进行了X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)和透射电子显微镜法(TEM)等表征分析以及旋转圆盘电极(RDE)、单电池电化学测试。与商品Pt/C催化剂相比,掺杂(CaTiO_(3)与Pt/C的质量比为1∶1)催化剂的半波电位正移39 mV;当氧浓度从100%逐渐降低到10%,Pt/C膜电极峰值功率密度降低了38.62%,Pt/CCTO膜电极峰值功率密度降低15.03%。在10%低氧浓度下,Pt/C-CTO膜电极峰值功率密度较Pt/C膜电极峰值功率密度高40.54%。

关键词：直接甲醇燃料电池阴极催化剂

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帕金森病晚期的识别及治疗策略

中华老年医学杂志 2024年第5期43卷 635-640页

作者：梁慧许吉怡秦斌海南省人民医院海南医学院附属海南医院神经内科海口570311 首都医科大学附属北京安定医院国家精神心理疾病临床医学研究中心精神疾病诊断与治疗北京市重点实验室北京100088 北京医院神经内科国家老年医学中心中国医学科学院老年医学研究院北京100730

帕金森病(PD)是一种临床表现异质性很高的慢性、进展性、多神经系统受累疾病。随着病情逐渐进展运动并发症的出现患者神经功能进一步恶化,生活质量下降及寿命缩短。常规传统药物治疗难以满足患者良好控制症状,此时称为PD晚期(Advanced P... 详细信息

帕金森病(PD)是一种临床表现异质性很高的慢性、进展性、多神经系统受累疾病。随着病情逐渐进展运动并发症的出现患者神经功能进一步恶化,生活质量下降及寿命缩短。常规传统药物治疗难以满足患者良好控制症状,此时称为PD晚期(Advanced PD,APD)。如何早期识别APD并结合病情变化、及时制定患者最佳治疗方案,在调药基础上推荐PD设备辅助治疗,不仅可提高患者服药依从性和治疗满意度,还可提高患者生活质量及减少照料者负担,但目前仍缺乏识别APD的临床表现和诊断的金标准。为此,本文旨在从APD早期识别和治疗策略方面进行阐述。

关键词：帕金森病晚期设备辅助治疗运动并发症人工智能

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流域环境保护智慧化管理路径思考

皮革制作与环保科技 2024年第2期5卷 174-176页

作者：秦彬江苏环保产业技术研究院股份公司江苏南京210019

城市化进程的加快及工业化水平的提升,对生态环境造成了严重的污染和破坏,甚至还会引起严重的水质恶化现象,威胁饮用水安全。因此,需要强化流域环境综合治理和保护,尤其要对信息技术、人工智能技术、云计算等新技术进行优化应用,形成流... 详细信息

城市化进程的加快及工业化水平的提升,对生态环境造成了严重的污染和破坏,甚至还会引起严重的水质恶化现象,威胁饮用水安全。因此,需要强化流域环境综合治理和保护,尤其要对信息技术、人工智能技术、云计算等新技术进行优化应用,形成流域环境保护智慧化管理平台,从而进一步提升流域环境保护管理效果,改善流域环境质量,促进人类与环境的和谐相处。文章主要对流域环境保护智慧化管理云平台的建设架构进行分析,并研究其实践应用方法,旨在进一步提升流域环境保护智慧化管理水平。

关键词：流域环境保护智慧化管理

改进MOGOA及其在风储容量优化配置中的应用

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电力科学与技术学报 2024年第2期39卷 159-169页

作者：王欣谭永怡秦斌湖南工业大学电气与信息工程学院湖南株洲412007

针对传统方法在风储容量优化配置过程中求解精度低、效率低等问题,提出一种改进多目标蝗虫优化算法(improved multi-objective grasshopper optimization algorithm,IMOGOA),采用Fuch混沌映射、余弦自适应参数和莱维飞行三种策略进行改... 详细信息

针对传统方法在风储容量优化配置过程中求解精度低、效率低等问题,提出一种改进多目标蝗虫优化算法(improved multi-objective grasshopper optimization algorithm,IMOGOA),采用Fuch混沌映射、余弦自适应参数和莱维飞行三种策略进行改进,使算法的初始解分布更均匀、全局探索和局部开发更协调,同时增强了算法跳出局部最优的能力。对改进算法和多目标粒子群等多个算法进行性能测试对比,实验结果表明改进算法具有更好的寻优精度和稳定性。将该算法应用于风电场混合储能系统容量优化配置,对比其他算法,改进算法能够快速找出Pareto最优解集,在满足系统要求的同时,最大限度降低混合储能系统成本,可以验证算法改进策略的有效性和应用于实际优化问题的适用性。

关键词：风电场储能容量优化配置蝗虫优化算法 Fuch混沌映射莱维飞行