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An Uncertainty Analysis and Reliability-Based Multidisciplinary Design Optimization Method Using Fourth-Moment Saddlepoint Approximation

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Computer Modeling in Engineering & Sciences 2023年第3期134卷 1855-1870页

作者： Yongqiang Guo zhiyuan lv School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Beijing Research Institute of Mechanical&Electrical Technology Ltd.Beijing100083China School ofMechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China

In uncertainty analysis and reliability-based multidisciplinary design and optimization(RBMDO)of engineering structures,the saddlepoint approximation(SA)method can be utilized to enhance the accuracy and efficiency of reliability ***,the random variables involved in SA should be easy to ***,the corresponding saddlepoint equation should not be *** of them limit the application of SA for engineering *** moment method can construct an approximate cumulative distribution function of the performance function based on the first few statistical ***,the traditional moment matching method is not very accurate *** order to take advantage of the SA method and the moment matching method to enhance the efficiency of design and optimization,a fourth-moment saddlepoint approximation(FMSA)method is introduced into *** FMSA,the approximate cumulative generating functions are constructed based on the first four moments of the limit state *** probability density function and cumulative distribution function are estimated based on this approximate cumulative generating ***,the FMSA method is introduced and combined into RBMDO within the framework of sequence optimization and reliability assessment,which is based on the performance measure approach *** engineering examples are introduced to verify the effectiveness of proposed method.

关键词： Reliability-based multidisciplinary design optimization moment method saddlepoint approximate sequence optimization and reliability assessment performance measure approach

RBMDO Using Gaussian Mixture Model-Based Second-Order Mean-Value Saddlepoint Approximation

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Computer Modeling in Engineering & Sciences 2022年第8期132卷 553-568页

作者： Debiao Meng Shiyuan Yang Tao Lin Jiapeng Wang Hengfei Yang zhiyuan lv School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Failure Mechanics&Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065China Yangzhou Yangjie Electronic Technology Co. Ltd.Yangzhou225008China Sichuan Special Equipment Inspection and Research Institute Chengdu610100China Food Safety Inspection Technology Center of Administration for Market Regulation of Sichuan Province Chengdu610017China

Actual engineering systems will be inevitably affected by uncertain ***,the Reliability-Based Multidisciplinary Design Optimization(RBMDO)has become a hotspot for recent research and application in complex engineering system *** Second-Order/First-Order Mean-Value Saddlepoint Approximate(SOMVSA/-FOMVSA)are two popular reliability analysis strategies that are widely used in ***,the SOMVSA method can only be used efficiently when the distribution of input variables is Gaussian distribution,which significantly limits its *** this study,the Gaussian Mixture Model-based Second-Order Mean-Value Saddlepoint Approximation(GMM-SOMVSA)is introduced to tackle above *** is integrated with the Collaborative Optimization(CO)method to solve RBMDO ***,the formula and procedure of RBMDO using GMM-SOMVSA-Based CO(GMM-SOMVSA-CO)are ***,an engineering example is given to show the application of the GMM-SOMVSA-CO method.

关键词： Uncertain factors reliability-based multidisciplinary design optimization saddlepoint approximate gaussian mixture model collaborative optimization

Fault Analysis of Wind Power Rolling Bearing Based on EMD Feature Extraction

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Computer Modeling in Engineering & Sciences 2022年第1期130卷 543-558页

作者： Debiao Meng Hongtao Wang Shiyuan Yang zhiyuan lv Zhengguo Hu Zihao Wang School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan523808China Yangzhou Yangjie Electronic Technology Co. Ltd.Yangzhou225008China

In a wind turbine,the rolling bearing is the critical ***,it has a high failure ***,the failure analysis and fault diagnosis of wind power rolling bearings are very important to ensure the high reliability and safety of wind power *** this study,the failure form and the corresponding reason for the failure are discussed ***,the natural frequency and the characteristic frequency are *** Empirical Mode Decomposition(EMD)algorithm is used to extract the characteristics of the vibration signal of the rolling ***,the eigenmode function is obtained and then filtered by the kurtosis ***,the relationship between the actual fault frequency spectrum and the theoretical fault frequency can be *** the fault analysis is *** enhance the accuracy of fault diagnosis,based on the previous feature extraction and the time-frequency domain feature extraction of the data after EMD decomposition processing,four different classifiers are added to diagnose and classify the fault status of rolling bearings and compare them with four different classifiers.

关键词： Wind turbine rolling bearing fault diagnosis empirical mode decomposition

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电阻抗技术在银杏树干健康评估中的应用研究

植物医学 2024年第1期3卷 86-92页

作者：胡月吴道军吕志远周涵宇胡冲田立超重庆市风景园林科学研究院重庆401329 川渝共建乡土植物种质创新与利用重庆市重点实验室重庆401329

为评估银杏行道树树干健康程度,降低树干断折倒伏风险,本研究采用PiCUS Tree Tronic树木电阻抗断层成像仪分别对健康、干旱、腐烂银杏树干进行检测,并与树干的目测结果进行比较.树干的断层扫描结果显示,健康树干的电阻率为中间高四周低... 详细信息

为评估银杏行道树树干健康程度,降低树干断折倒伏风险,本研究采用PiCUS Tree Tronic树木电阻抗断层成像仪分别对健康、干旱、腐烂银杏树干进行检测,并与树干的目测结果进行比较.树干的断层扫描结果显示,健康树干的电阻率为中间高四周低,中部电阻率达1000Ω·m,四周电阻率约300Ω·m;干旱的银杏树干整体呈现高电阻率,平均电阻率达1000Ω·m以上;腐烂树干的电阻率差异与腐烂区域相关,腐烂面积占比普遍高于目测结果,说明电阻抗技术能够更准确地探测树干内部的健康状况,该结果可为银杏树干健康评估提供指导.

关键词：电阻抗断层扫描银杏树干腐烂

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响应面法优化浓香型白酒扣盖蒸料工艺

中国酿造 2024年第6期43卷 233-238页

作者：商海林邢宪卿吕志远刘玉涛张梦梦赵巧珍任广花缪坤辰苏静齐鲁工业大学(山东省科学院)生物工程学院山东济南250353 济南趵突泉酿酒有限责任公司山东济南250115

该研究以淀粉糊化率和酸度为考察指标,采用单因素试验探究蒸料时间、蒸汽通量以及稻壳用量对入池酒醅蒸料效果的影响。在单因素试验的基础上,以淀粉糊化率为响应值,通过Plackett-Burman试验及响应面试验优化浓香型白酒扣盖蒸料的工艺条... 详细信息

该研究以淀粉糊化率和酸度为考察指标,采用单因素试验探究蒸料时间、蒸汽通量以及稻壳用量对入池酒醅蒸料效果的影响。在单因素试验的基础上,以淀粉糊化率为响应值,通过Plackett-Burman试验及响应面试验优化浓香型白酒扣盖蒸料的工艺条件,并将其与开盖蒸料工艺进行比较。结果表明,蒸料时间、蒸汽通量以及稻壳用量对入池酒醅的淀粉糊化程度影响显著(P0.05),其中酸度为(2.22±0.13)mmol/10 g、原酒出酒率为(38.11±0.11)%、己酸乙酯含量为(2.89±0.06)g/L,酒醅入池发酵过程中的温度变化趋势一致,说明扣盖蒸料工艺能够保证浓香型白酒的正常发酵。

关键词：浓香型白酒入池酒醅扣盖蒸料工艺淀粉糊化率响应面法

Highly efficient catalyzed by imidazolium-based dual-sulfonic acid functionalized ionic liquids for liquid phase Beckmann rearrangement:experiments and COSMO-RS calculations

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Green Chemical Engineering 2024年第1期5卷 108-118页

作者： Xin Guo zhiyuan Wang Ye Yang Jiahui Zhang Yanduo Liu zhiyuan Mu Siqi Jiang Chunxiao Ren Dan lv Yufeng Hu Zhichang Liu State Key Laboratory of Heavy Oil Processing and High Pressure Fluid Phase Behavior&Property Research Laboratory China University of PetroleumBeijing102249China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei230026China School of Light Industry and Engineering South China University of TechnologyGuangzhou510641China

A production technique with the high yield and environmentally friendly process need be developed forε-Caprolactam(CPL)in the chemical *** technology is highly desired to design and synthesize high--performance catalysts for liquid phase Beckmann rearrangement of cyclohexanone oxime(CHO)to *** this work,3-methyl-1-(propyl-4-sulfonyl)imidazolium methanesulfonate([PHSO_(3)MIM][MSA])with highly efficient and excellent yield is synthesized *** the optimum molar ratio of ZnCl_(2)over[PHSO_(3)MIM][MSA]was 0.02,it exhibits the high selectivity(94%)of CPL at 90℃for 1 ***,Fourier-transform infrared(FT-IR)investigations show that the functional Br∅nsted-Lewis acidic types of ionic liquids(ILs)are formed by the uniformly distributed ZnCl_(2)and[PHSO_(3)MIM][MSA].In addition,the hydrogen bond(H-bond)is formed between CHO and *** ten reaction cycles,no significant structure changes are observed in the recovered[PHSO_(3)MIM][MSA]-ZnCl_(2).The solubilities of ILs are predicted by using COSMO-RS model,the results show that[PHSO_(3)MIM][MSA]is a promising candidate for the liquid phase Beckmann rearrangement of CHO into ***,a theoretical model of the H-bond interactions between ILs and CHO is further confirmed to support the advance of reaction mechanism.A feasible way is provided for the CPL production technique in the liquid phase Beckmann rearrangement reaction.

关键词： Liquid phase Beckmann rearrangement Imidazolium-based ionic liquids COSMO-RS calculations H-bond

Rules for Description in Bibliographic References: Special Literature

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China Standardization 2010年第1期55卷 30-35页

作者： Wei Zhenshu Xue Peijun lv zhiyuan Journal Editoral Board of Zhongzhou University Zhengzhou China

GB/T 7714-2005 Rules for description of bibliographic reference is specifically for writers and editors to edit bibliographic references. Legal documents, standard documents and patent documents are considered special. GB/T 7714-2005 provides that description of such literature in bibliographic references should stress the key points and simplify the content.

关键词： legal documents standard documents patent documents bibliographic references descriptive rules

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浓香型白酒酿造区域空气微生物群落结构研究

中国酿造 2024年第3期43卷 33-39页

作者：王秀秀汪俊卿吕志远刘玉涛张梦梦商海林任广花张晨曦章成真齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室山东济南250353 齐鲁工业大学(山东省科学院)生物工程学部山东济南250353 济南趵突泉酿酒有限责任公司技术质量部山东济南250115

为探究浓香型白酒厂不同区域空气微生物的群落结构特征,利用Illumina Miseq高通量测序技术对趵突泉浓香型酒厂厂区内、酿酒车间外、酿酒车间内空气微生物的群落结构及分布情况进行研究。结果表明,厂区内空气样品微生物菌群最丰富,多样... 详细信息

为探究浓香型白酒厂不同区域空气微生物的群落结构特征,利用Illumina Miseq高通量测序技术对趵突泉浓香型酒厂厂区内、酿酒车间外、酿酒车间内空气微生物的群落结构及分布情况进行研究。结果表明,厂区内空气样品微生物菌群最丰富,多样性最高,酿酒车间内多样性较低,表明在长期酿造过程中,经过不断地筛选,淘汰不适应酿酒环境的微生物,适宜的微生物富集形成了与环境相适应且相对稳定的微生物区系。从所有空气样品中共检测出748个细菌操作分类单元(OTUs),340个真菌操作分类单元;共注释到20个细菌门、289个细菌属和7个真菌门、149个真菌属。酒厂不同区域空气样品细菌菌群差异较大,真菌菌群相似度较高,与厂区内空气样品微生物相比,酿酒车间内、外微生物群落更接近。此外,在酿酒车间内还发现了机械化浓香型白酒酿造特有的副球菌属(Paracococcus)等微生物菌群。

关键词：浓香型白酒酿造区域空气微生物细菌真菌群落结构

利用白酒酿造的固废料制作生物有机肥及其应用的方法

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酿酒 2024年第2期51卷 138-141页

作者：李小杰张梦梦吕志远刘玉涛秦炳伟胥鑫钰赵巧珍济南趵突泉酿酒有限责任公司山东省济南市250115

白酒酿造生产过程中产生大量的丢糟、废弃窖泥等固废料,这些固废料含有大量的蛋白质、淀粉、脂肪以及各种微生物,妥善处理这些固废料可以为公司带来不错的经济效益和社会效益。利用山东济南趵突泉酿酒有限责任公司的白酒酿造固废料制作... 详细信息

白酒酿造生产过程中产生大量的丢糟、废弃窖泥等固废料,这些固废料含有大量的蛋白质、淀粉、脂肪以及各种微生物,妥善处理这些固废料可以为公司带来不错的经济效益和社会效益。利用山东济南趵突泉酿酒有限责任公司的白酒酿造固废料制作生物有机肥,经过不断的实验方案探究和生物有机肥的施用实验,最终总结出符合标准NY/T525-2021并且制作成本最低的生物有机肥制作方案,然后根据自身条件如何利用制作的生物有机肥给企业带来不错的经济效益和社会效益。

关键词：白酒酿造丢糟生物有机肥经济效益和社会效益