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艾米果开发与应用研究

农产品加工 2024年第16期 90-92页

作者：刘育颖郭琪李华勇吉安职业技术学院江西吉安343006 吉安市食品药品检验检测中心江西吉安343099

艾米果(又称青团)是我国南方在清明节前后食用的一种传统食品,其主要由糯米粉加面粉(黏米粉)拌入艾草泥制成团,包入馅料后经蒸制或面团先蒸制后包入馅料而成,具有色如碧玉、口感软糯、清香扑鼻的特点。为了使传统的食品更好地传承与推广... 详细信息

艾米果(又称青团)是我国南方在清明节前后食用的一种传统食品,其主要由糯米粉加面粉(黏米粉)拌入艾草泥制成团,包入馅料后经蒸制或面团先蒸制后包入馅料而成,具有色如碧玉、口感软糯、清香扑鼻的特点。为了使传统的食品更好地传承与推广,通过对艾米果风味特色、原料粉的配比、加工工艺优化、抗老化研究等方面进行综述,为艾米果的工业化、标准化生产研究提供思路,也为特色农产品的推广提供参考。

关键词：艾米果风味配比抗老化

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抗老化艾草米果加工工艺研究

农产品加工 2024年第6期 50-54页

作者：刘育颖李华勇郭琪吉安职业技术学院江西吉安343006 吉安市食品药品检验检测中心江西吉安343099

为了抑制艾草米果的老化,实现常温条件下保藏,达到开袋即食的便利。通过产品配方、熟制工艺、外源物添加等进行抗老化加工工艺研究,最终确定了艾草米果的理想配方为糯米粉、面粉的配比7∶3,水添加量70%,艾草粉添加量8%,在蒸汽压为0.25 ... 详细信息

为了抑制艾草米果的老化,实现常温条件下保藏,达到开袋即食的便利。通过产品配方、熟制工艺、外源物添加等进行抗老化加工工艺研究,最终确定了艾草米果的理想配方为糯米粉、面粉的配比7∶3,水添加量70%,艾草粉添加量8%,在蒸汽压为0.25 MPa下炼制40 min,此条件下生产的艾草米果色泽碧绿、口感软糯,表面光滑饱满,艾草香气浓郁。最优的抗老化方案为卡拉胶添加量0.3%,M601保软酶添加量0.8%,SCL-SSL添加量0.4%。

关键词：艾草米果老化外源添加物

白肾豆中α-淀粉酶抑制剂的超声波辅助提取工艺研究

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生物化工 2024年第1期10卷 116-119页

作者：李华勇王尚军丁振鑫吉安市食品药品检验检测中心江西吉安343000 浙江工商大学环境科学与工程学院浙江杭州310018

目的:研究白肾豆中α-淀粉酶抑制剂提取的最优工艺。方法:采用超声波辅助提取白肾豆中α-淀粉酶抑制剂,研究了白肾豆粉细度、提取时间、提取温度、超声功率和料液比对白肾豆中α-淀粉酶抑制剂得率的影响。结果:通过单因素和正交实验,确... 详细信息

目的:研究白肾豆中α-淀粉酶抑制剂提取的最优工艺。方法:采用超声波辅助提取白肾豆中α-淀粉酶抑制剂,研究了白肾豆粉细度、提取时间、提取温度、超声功率和料液比对白肾豆中α-淀粉酶抑制剂得率的影响。结果:通过单因素和正交实验,确定了最佳工艺条件为料液比1∶10(g∶mL)、提取温度60℃、提取时间100 min、超声功率200 W。依照优化条件进行重复试验,此时白肾豆中α-淀粉酶抑制剂的得率为4.51%。

关键词：白肾豆 α-淀粉酶抑制剂超声波辅助提取工艺优化

智慧农业装备虚拟仿真实训基地建设研究与实践

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智慧农业导刊 2024年第16期4卷 18-21页

作者：徐晓琳刘帅李华勇孟欣潍坊职业学院山东潍坊262737

该文通过梳理目前国内虚拟仿真实训基地建设存在的问题,对比借鉴国内外先进经验,从虚拟仿真基地环境建设、仿真资源建设、虚拟仿真实训基地综合服务平台建设、运营管理模式4个方面进行研究,结合智慧农业装备产业特色,在校企合作共创共... 详细信息

该文通过梳理目前国内虚拟仿真实训基地建设存在的问题,对比借鉴国内外先进经验,从虚拟仿真基地环境建设、仿真资源建设、虚拟仿真实训基地综合服务平台建设、运营管理模式4个方面进行研究,结合智慧农业装备产业特色,在校企合作共创共建共享的实践过程中,全面落实育训并举职责,探索解决基地整体管理资源调配共享难、“三高四不”等教学难题,为智慧农业装备虚拟仿真实训基地建设提供理论指导。

关键词：智慧农业农业装备虚拟仿真实训基地虚拟仿真基地

From tunnel boring machine to tunnel boring robot: perspectives on intelligent shield machine and its smart operation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第5期25卷 357-381页

作者： Yakun ZHANG Guofang GONG huayong YANG Jianbin li liujie JING State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China China Railway Engineering Equipment Group Co. Lid.Zhengzhou 450016China Maha Fluid Power Research Center Purdue UniversityWest LafayetteIN 47905USA

Advances in intelligent shield machines reflect an evolving trend from traditional tunnel boring machines(TBMs)to tunnel boring robots(TBRs).This shift aims to address the challenges encountered by the conventional shield machine industry arising from construction environment and manual *** study presents a systematic review of intelligent shield machine technology,with a particular emphasis on its smart ***,the definition,meaning,contents,and development modes of intelligent shield machines are *** development status of the intelligent shield machine and its smart operation are then *** analyzing the operation process of the shield machine,an autonomous operation framework considering both stand-alone and fleet levels is *** and recommendations are given for achieving autonomous *** study offers insights into the essence and developmental framework of intelligent shield machines to propel the advancement of this technology.

关键词： Intelligent shield machine Tunnel boring machine(TBM) Tunnel boring robot(TBR) Self-driving Autonomous control Shield machine

Discovery of bacteriopheophytin-a in lacustrine deposits from Lake Zigetang on the central Tibetan Plateau and its paleoenvironmental significance

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Science China Earth Sciences 2017年第12期60卷 2171-2180页

作者： li huayong ZHANG HuCai CHANG FengQin ZHENG Qian ZHANG WenXiang LEI Guoliang LEI YanBin PU Yang JI JunFeng Key Laboratory of Plateau Lake Ecology and Global Change Yunnan Provincial Key Laboratory of Plateau Geography Process and Environment ChangesCollege of Tourism and Geography ScienceYunnan Normal UniversityKunming 650500China School of Resource Environment and Tourism Anyang Normal UniversityAnyang 455000China College of Urban and Environment Sciences Central China Normal UniversityWuhan 430079China Key Laboratory for Subtropical Mountain Ecology(Ministry of Science and Technology and Fujian Province Funded) Fujian Normal UniversityFuzhoa 350007China Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100085China School of Remote Sensing Nanjing University of Information Science&TechnologyNanjing 210044China Institute of Surface Geochemistry Department of Earth SciencesNanjing UniversityNanjing 210093China

Lake Zigetang is located on the central Tibetan Plateau(TP) and represents a rare but typical meromictic lake in *** lake's stable meromixis sustains microflora communities, and changes in these communities are relatively independent of climate. Therefore, these communities can be used as paleoclimate proxies. In this paper, the stratification properties and their relationships with the microflora of Lake Zigetang were analyzed. We found that water depth and climate conditions were two important factors for maintaining meromixis in Lake Zigetang. Generally, stratification was enhanced during warm periods, while temperature differences between the mixolimnion and monimolimnion were decreased during cold periods. The presence of anoxygenic phototrophic bacteria(APB) was demonstrated by the discovery of bacteriopheophytin-a(Bph-a) in the *** bacterial community is mainly concentrated at the bottom of the chemocline and the top of the monimolimnion, where it forms a thin APB layer. Moreover, total APB productivity is mainly affected by the light intensity penetrating to the APB layer,which exponentially increases as the thermocline becomes shallow. Therefore, high Bph-a values in the lake corresponded to a shallow thermocline and warm periods, low Bph-a values corresponded to cold periods, and zero changes indicated that the water was completely mixed and reflected an extreme cold climate or low lake level period. Thus, Bph-a can be used as a climate proxy to reconstruct the history of lake stratification and climate changes.

关键词： Lake Zigetang Tibetan Plateau Meromictic lakes Thermocline Anoxygenic phototrophic bacteria

Switching Frequency Improvement of a High Speed on/off Valve Based on Pre-excitation Control Algorithm

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Chinese Journal of Mechanical Engineering 2024年第4期37卷 94-106页

作者： Qi Zhong Xiaotian li Yongxin Mao Enguang Xu Tiwei Jia Yanbiao li huayong Yang College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education and Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310023China

The high-speed on/off valve(HSV)serves as the fundamental component responsible for generating discrete fluids within digital hydraulic *** the switching frequency of the HSV increases,the properties of the generated discrete fluid approach those of continuous ***,a higher frequency response characteristic of HSV is the key to ensure the control accuracy of digital hydraulic ***,the current research mainly focuses on its dynamic performance,but neglect its *** paper presents a theoretical analysis demonstrating that the FRC of the HSV can be enhanced by minimizing its switching *** maximum switching frequency(MSF)is mainly determined by opening dynamic performance when HSV operates with low switching duty ratio(SDR),whereas the closing dynamic performance limits the MSF when HSV operates with high *** upon these findings,the pre-excitation control algorithm(PECA)is proposed to reduce the switching time of the HSV,and consequently enhance its *** results demonstrate that PECA shortens the opening delay time of HSV by 1.12 ms,the closing delay time by 2.54 ms,and the closing moving time by 0.47 ms in comparison to the existing advanced control *** a result,a larger MSF of 417 Hz and a wider controllable SDR range from 20%to 70%were achieved at a switching frequency of 250 ***,the proposed PFCA in this paper has been verified as an effective and promising approach for enhancing the control performance of digital hydraulic systems.

关键词： High speed on/off valve Switching frequency Pre-excitation Dynamic performance Switching duty ratio

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不同构型盾构隧道管片密封垫防水性能分析

施工技术（中英文） 2024年第3期53卷 28-34,48页

作者：崔庆龙杨林松曹鸿李华勇吴怀娜庞明中交第二公路勘察设计研究院有限公司湖北武汉430056 中交集团隧道与地下空间工程技术研发中心湖北武汉430056 湖南大学土木工程学院湖南长沙410082 中国路桥工程有限责任公司北京100010

为研究大直径盾构隧道管片接缝密封垫截面构型对防水性能的影响,分别构建三角形、圆形、半圆+三角形构型密封垫数值模型,分析不同张开量、错台量组合下密封垫接触应力。研究结果表明,三角形及圆形构型封垫接触应力呈两头大、中间小的趋... 详细信息

为研究大直径盾构隧道管片接缝密封垫截面构型对防水性能的影响,分别构建三角形、圆形、半圆+三角形构型密封垫数值模型,分析不同张开量、错台量组合下密封垫接触应力。研究结果表明,三角形及圆形构型封垫接触应力呈两头大、中间小的趋势分布,截面实心区域压缩反力较大,传递到接触面出现峰值应力,开孔区域应力较小。错台压缩中密封垫变形及受力状态更复杂,随着错台量的增加,接触面更扭曲,接触路径发生改变。随着错台量的发展,三角形和圆形构型密封垫接触路径变长,半圆+三角形构型密封垫接触路径缩短。结合箱型图分析,提出以中位数接触应力作为评价指标,该指标能排除异常值,反映的接触面情况更加真实。

关键词：盾构隧道密封垫防水性能数值模拟

太行山地区1973—2022年暴雨时空演变特征分析

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信阳师范学院学报（自然科学版） 2024年第4期37卷 524-531页

作者：唐倩玉李远航胡孟然张基恒李华勇傅志远黄上玉李依霖安阳师范学院资源环境与旅游学院河南安阳455000 安阳市气象局安阳国家气候观象台河南安阳455000

基于太行山地区13个气象站点50 a的逐日降水数据,使用Mann-Kendall突变检验、信噪比检验、Sen’s斜率估计、小波分析法、正交函数分解等方法,对太行山地区的暴雨时空演变规律进行了研究。结果表明:(1)太行山地区年暴雨量波动幅度较大,... 详细信息

基于太行山地区13个气象站点50 a的逐日降水数据,使用Mann-Kendall突变检验、信噪比检验、Sen’s斜率估计、小波分析法、正交函数分解等方法,对太行山地区的暴雨时空演变规律进行了研究。结果表明:(1)太行山地区年暴雨量波动幅度较大,根据拟合斜率和Sen’s斜率估计法的结果可知,太行山地区的暴雨量将会呈增多趋势;(2)Mann-Kendall突变检验和信噪比检验结果表明,2006年太行山暴雨量发生了由少变多的突变;(3)Morlet小波分析结果表明,在2017—2020间研究区暴雨量存在2~3 a的周期尺度变换;(4)该地区暴雨量经验正交函数(EOF)展开的前两个模态显示,暴雨量呈现全区一致变化以及西南—东北向的空间变化特征,这两个模态情境下的暴雨状况受到环流因子和地形的共同影响。

关键词：太行山暴雨时空分布正交函数(EOF)分析小波分析