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A causal model of eating behaviors among Thai pregnant women working in industrial factories
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作者 Tatirat Tachasuksri Chanapa Ngamchay Sivasankari Nadarajan 《Frontiers of Nursing》 2024年第2期221-229,共9页
Objective:This study aimed to examine the causal model of eating behaviors among pregnant women working in industrial factories.Methods:This cross-sectional study was conducted on 210 participants,attending 4 healthca... Objective:This study aimed to examine the causal model of eating behaviors among pregnant women working in industrial factories.Methods:This cross-sectional study was conducted on 210 participants,attending 4 healthcare centers,at a tertiary care hospital in Chonburi province,Thailand.Data were collected using 7 questionnaires:demographic form,eating behavior questionnaire,perceived benefits of the healthy eating questionnaire,perceived barriers to the healthy eating questionnaire,perceived self-efficacy questionnaire,social support questionnaire,and accessibility to healthy foods questionnaire.Descriptive statistics and path analysis were used for data analysis.Results:The participants had relatively high mean scores for eating behaviors.The final model fitted well with the dataχ^(2)=12.86,df=10,P=0.23;χ^(2)/df=1.29;comparative fit index(CFI)=0.98;goodness-of-fit index(GFI)=0.98;adjusted goodness-of-fit index(AGFI)=0.95;root mean square error of approximation(RMSEA)=0.04.Four factors-perceived benefits(β=0.13,P<0.05),perceived self-efficacy in healthy eating(β=0.22,P<0.001),pregnancy planning(β=0.28,P<0.001),and accessibility to healthy foods in the factory(β=0.12,P<0.05)-positively affected eating behavior,while only perceived barriers to healthy eating had a negative effect on eating behavior(β=−0.24,P<0.001).All the above factors explained 27.2%of the variance in eating behaviors.Conclusions:Nurses or healthcare providers can apply these findings to create an eating behavior modification program,focusing on pregnancy planning,behavior-specific variables,and interpersonal and situational influence,to promote the nutritional status of pregnant women working in industrial factories. 展开更多
关键词 eating behaviors industrial factories perceived barriers pregnant women Thailand
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Parallel Factories for Smart Industrial Operations:From Big AI Models to Field Foundational Models and Scenarios Engineering 被引量:12
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作者 Jingwei Lu Xingxia Wang +3 位作者 Xiang Cheng Jing Yang Oliver Kwan Xiao Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2022年第12期2079-2086,共8页
The rapid advancement of fundamental theories and computing capacity has brought artificial intelligence,internet of things, extended reality, and many other new intelligent technologies into our daily lives. Due to t... The rapid advancement of fundamental theories and computing capacity has brought artificial intelligence,internet of things, extended reality, and many other new intelligent technologies into our daily lives. Due to the lack of interpretability and reliability guarantees, it is extremely challenging to apply these technologies directly to real-world industrial systems. Here we present a new paradigm for establishing parallel factories in metaverses to accelerate the deployment of intelligent technologies in real-world industrial systems: QAII-1.0. Based on cyber-physical-social systems,QAII-1.0 incorporates complex social and human factors into the design and analysis of industrial operations and is capable of handling industrial operations involving complex social and human behaviors. In QAII-1.0, a field foundational model called Eu Artisan combined with scenarios engineering is developed to improve the intelligence of industrial systems while ensuring industrial interpretability and reliability. Finally, parallel oil fields in metaverses are established to demonstrate the operating procedure of QAII-1.0. 展开更多
关键词 Cyber-physical-social system(CPSS) Industry5.0 Metaverses Parallel factories Parallel intelligence
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Deciphering and engineering high-light tolerant cyanobacteria for efficient photosynthetic cell factories 被引量:2
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作者 Yaru Xie Lei Chen +1 位作者 Tao Sun Weiwen Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第2期82-91,共10页
Development and utilization of“liquid sunshine”could be one of key solutions to deal with the issues of fossil fuel depletion and increasing carbon dioxide.Cyanobacteria are the only prokaryotes capable of performin... Development and utilization of“liquid sunshine”could be one of key solutions to deal with the issues of fossil fuel depletion and increasing carbon dioxide.Cyanobacteria are the only prokaryotes capable of performing oxygenic photosynthesis,and their activity accounts for~25%of the total carbon fixation on earth.More importantly,besides their traditional roles as primary producers,cyanobacteria could be modified as“photosynthetic cell factories”to produce renewable fuels and chemicals directly from CO_(2) driven by solar energy,with the aid of cutting-edging synthetic biology technology.Towards their large-scale biotechnological application in the future,many challenges still need to be properly addressed,among which is cyanobacterial cell factories inevitably suffer from high light(HL)stress during large-scale outdoor cultivation,resulting in photodamage and even cell death,limiting their productivity.In this review,we critically summarized recent progress on deciphering molecular mechanisms to HL and developing HL-tolerant chassis in cyanobacteria,aiming at facilitating construction of HLresistant chassis and promote the future application of the large-scale outdoor cultivation of cyanobacterial cell factories.Finally,the future directions on cyanobacterial chassis engineering were discussed. 展开更多
关键词 HIGH-LIGHT STRESS CHASSIS Cell factories CYANOBACTERIA
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MDA (Model-Driven Architecture) as a Software Industrialization Pattern: An Approach for a Pragmatic Software Factories 被引量:1
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作者 Thomas Djotio Ndie Claude Tangha Fritz Ekwoge Ekwoge 《Journal of Software Engineering and Applications》 2010年第6期561-571,共11页
In this paper we show that the MDA can be considered as a software industrialization pattern (or a software factory). Nearly all industries today are haunted with how to reduce costs, improve quality, faster time-to-m... In this paper we show that the MDA can be considered as a software industrialization pattern (or a software factory). Nearly all industries today are haunted with how to reduce costs, improve quality, faster time-to-market and to maximize profits. These challenges are particularly relevant to the software industry, because it still lags behind other technology sectors as regards industrialization and the timely delivery of software products. Most software are still of poor quality, always finished after deadlines (most don’t finish at all), and are very labour intensive. Here, we discuss the MDA as an approach that may help solving at the same time both problems of industrialization and ever-changing software infrastructures. We propose a MDA Engine based on a real case study in an IT services company. It is a proposal for a framework to create custom MDA tools, based on XMI, XSLT and the Visitor Pattern. 展开更多
关键词 SOFTWARE INDUSTRIALIZATION SOFTWARE factories MDA MDA Engine MDD DSM
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American Factories Continue to Increase Equipment Investment——Competitors in Asia also increased their consumption of machine tools.
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作者 Joe Jablonowski Tanhui(译) 《机电新产品导报》 2006年第7期116-118,共3页
去年美国金属加工工厂对新机床产品的需求量较 2004 年和 2003 年都有增加。消沉中的美国资本投资发生了一个转变,排在德国之前成为第三大消费国。然而对于美国机床业来说,不太好的消息是亚洲竞争对手同样增加了他们在机床的设备投资。... 去年美国金属加工工厂对新机床产品的需求量较 2004 年和 2003 年都有增加。消沉中的美国资本投资发生了一个转变,排在德国之前成为第三大消费国。然而对于美国机床业来说,不太好的消息是亚洲竞争对手同样增加了他们在机床的设备投资。来自第 41 次世界机床生产和消费的调查显示,中国、日本、韩国、印度以及中国台湾地区的机床消费都有显著增长。在 28 个国家和地区的调查中,四分之三的国家和地区消费都在增长,这同时也诠释了经济“表面消费”的含义。这一切表明美国的机床消费量还会继续保持增加,订购机器的数量会维持向上的势头,最新的数据也证明了这一点。此外,调查数据还罗列了其它国家,尤其是亚洲国家的机床生产情况(本刊2006 年第一期环球瞭望栏目文章图表中显示了世界主要机床生产状况):德国和日本领导着世界机床的生产;中国超过意大利成为第三大机床生产国;中国台湾地区排在第五位;美国机床的生产和出口排在台湾之后,保持小的增长;韩国与瑞士紧追其后;印度也毫不示弱。这28个被调查国家和地区的机床产量都比前一年平均增长了14% 。中国、日本、韩国、印度以及中国台湾地区占据了整个调查地区机床产量的 47.6% ,作为CECIMO 成员的由 15 个国家组成的西欧联盟占据了机床产量的 4 2 . 3 % 。 展开更多
关键词 机床生产 消费量 美国 机床消费 台湾 美利坚合众国 北美洲 机床产量 American factories Continue to Increase Equipment Investment Competitors in Asia also increased their consumption of machine tools 亚洲 中国台湾地区 ASIA
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Architecture and biogenesis of plus-strand RNA virus replication factories 被引量:6
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作者 David Paul Ralf Bartenschlager 《World Journal of Virology》 2013年第2期32-48,共17页
Plus-strand RNA virus replication occurs in tight association with cytoplasmic host cell membranes. Both, viral and cellular factors cooperatively generate distinct organelle-like structures, designated viral replicat... Plus-strand RNA virus replication occurs in tight association with cytoplasmic host cell membranes. Both, viral and cellular factors cooperatively generate distinct organelle-like structures, designated viral replication factories. This compartmentalization allows coordination of the different steps of the viral replication cycle, highly efficient genome replication and protection of the viral RNA from cellular defense mechanisms. Electron tomography studies conducted during the last couple of years revealed the three dimensional structure of numerous plus-strand RNA virus replication compartments and highlight morphological analogies between different virus families. Based on the morphology of virusinduced membrane rearrangements, we propose two separate subclasses: the invaginated vesicle/spherule type and the double membrane vesicle type. This review discusses common themes and distinct differences in the architecture of plus-strand RNA virus-induced membrane alterations and summarizes recent progress that has been made in understanding the complex interplay between viral and co-opted cellular factors in biogenesis and maintenance of plus-strand RNA virus replication factories. 展开更多
关键词 VIRAL REPLICATION factory VIRAL REPLICATION complex Plus-strand RNA VIRUS Membrane remodeling Virus-host interaction ALPHAVIRUS Enterovirus Coronavirus Flavivirus Hepatitis C VIRUS
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Fast Trainable Capabilities in Software Engineering-Skill Development in Learning Factories
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作者 AndréUllrich Malte Teichmann Norbert Gronau 《计算机教育》 2020年第12期2-10,共9页
The increasing demand for software engineers cannot completely be fulfilled by university education and conventional training approaches due to limited capacities.Accordingly,an alternative approach is necessary where... The increasing demand for software engineers cannot completely be fulfilled by university education and conventional training approaches due to limited capacities.Accordingly,an alternative approach is necessary where potential software engineers are being educated in software engineering skills using new methods.We suggest micro tasks combined with theoretical lessons to overcome existing skill deficits and acquire fast trainable capabilities.This paper addresses the gap between demand and supply of software engineers by introducing an actionoriented and scenario-based didactical approach,which enables non-computer scientists to code.Therein,the learning content is provided in small tasks and embedded in learning factory scenarios.Therefore,different requirements for software engineers from the market side and from an academic viewpoint are analyzed and synthesized into an integrated,yet condensed skills catalogue.This enables the development of training and education units that focus on the most important skills demanded on the market.To achieve this objective,individual learning scenarios are developed.Of course,proper basic skills in coding cannot be learned over night but software programming is also no sorcery. 展开更多
关键词 learning factory programming skills software engineering TRAINING
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Assessing Enabling Competence of Leagile Manufacturing Model and Its Impact on Performance of Small and Medium Factories in Uganda
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作者 Nickson Nagaaba 《American Journal of Operations Research》 2022年第4期127-155,共29页
Purpose: Leagile manufacturing is one of the time-based manufacturing practices used to improve factory performance. It is a practice that combines initiatives of Lean and agile manufacturing under certain enabling co... Purpose: Leagile manufacturing is one of the time-based manufacturing practices used to improve factory performance. It is a practice that combines initiatives of Lean and agile manufacturing under certain enabling competences. Therefore, the purpose of this study is investigate the combinative nature of time-based manufacturing practices under unique enabling competences and their impact on performance of factories in Uganda. Methodology: Firstly, the underlying factor structure of competences and time-based manufacturing was examined was conducted using Principal Component Analysis (PCA). Enabling competences and time-base manufacturing practices were modelled and validated for each using confirmatory factor analysis, particularly composite reliability, average variance extracted and convergent validity. A fully fledged structural equation model was used to test the impact of leagile manufacturing on performance of factories. Findings: The study results revealed that time-based manufacturing of lean, and leagile are related but differ, in terms of their enabling competences and philosophical orientation. The findings also revealed that when small and medium factories in Uganda adopt leagile practice, they are likely not improve their performance. This is perhaps due to the fact that small and medium factories have inadequate resources. Practical Implications: The study findings shed more insights on the factors that enable adoption and implementation of time-based manufacturing practices. The extent to which these competences are orchestrated determines the benefits derived from the time-based manufacturing practices. In addition, small and medium enterprises should keenly make a choice on the appropriate practices that purposely reduce their lead time and cost of conversion. Originality: This study investigated the combinative nature of time-based manufacturing practices under unique enabling competences and their impact on performance of factories in Uganda. It is among the few studies that provide evidence on the leagile model anchored in the appropriate enabling competences in the context of developing countries. The empirical survey was done on small and medium factories to validate a leagile manufacturing model and tested its impact on factory performance. 展开更多
关键词 Time-Based Manufacturing Lean Manufacturing Agile Manufacturing Leagile Manufacturing Factory Performance
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Constructing efficient bacterial cell factories to enable one-carbon utilization based on quantitative biology:A review
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作者 Yazhen Song Chenxi Feng +7 位作者 Difei Zhou Zengxin Ma Lian He Cong Zhang Guihong Yu Yan Zhao Song Yang Xinhui Xing 《Quantitative Biology》 CAS CSCD 2024年第1期1-14,共14页
Developing methylotrophic cell factories that can efficiently catalyze organic one-carbon(C1)feedstocks derived from electrocatalytic reduction of carbon dioxide into bio-based chemicals and biofuels is of strategic s... Developing methylotrophic cell factories that can efficiently catalyze organic one-carbon(C1)feedstocks derived from electrocatalytic reduction of carbon dioxide into bio-based chemicals and biofuels is of strategic significance for building a carbon-neutral,sustainable economic and industrial system.With the rapid advancement of RNA sequencing technology and mass spectrometer analysis,researchers have used these quantitative microbiology methods extensively,especially isotope-based metabolic flux analysis,to study the metabolic processes initiating from C1 feedstocks in natural C1-utilizing bacteria and synthetic C1 bacteria.This paper reviews the use of advanced quantitative analysis in recent years to understand the metabolic network and basic principles in the metabolism of natural C1-utilizing bacteria grown on methane,methanol,or formate.The acquired knowledge serves as a guide to rewire the central methylotrophic metabolism of natural C1-utilizing bacteria to improve the carbon conversion efficiency,and to engineer non-C1-utilizing bacteria into synthetic strains that can use C1 feedstocks as the sole carbon and energy source.These progresses ultimately enhance the design and construction of highly efficient C1-based cell factories to synthesize diverse high value-added products.The integration of quantitative biology and synthetic biology will advance the iterative cycle of understand–design–build–testing–learning to enhance C1-based biomanufacturing in the future. 展开更多
关键词 ^(13)C-metabolic flux analysis methylotrophic cell factories one-carbon feedstock quantitative biology
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Design and construction of microbial cell factories based on systems biology 被引量:2
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作者 Wenlong Yan Zhibei Cao +1 位作者 Mingzhu Ding Yingjin Yuan 《Synthetic and Systems Biotechnology》 SCIE CSCD 2023年第1期176-185,共10页
Environmental sustainability is an increasingly important issue in industry.As an environmentally friendly and sustainable way,constructing microbial cell factories to produce all kinds of valuable products has attrac... Environmental sustainability is an increasingly important issue in industry.As an environmentally friendly and sustainable way,constructing microbial cell factories to produce all kinds of valuable products has attracted more and more attention.In the process of constructing microbial cell factories,systems biology plays a crucial role.This review summarizes the recent applications of systems biology in the design and construction of microbial cell factories from four perspectives,including functional genes/enzymes discovery,bottleneck pathways identification,strains tolerance improvement and design and construction of synthetic microbial consortia.Systems biology tools can be employed to identify functional genes/enzymes involved in the biosynthetic pathways of products.These discovered genes are introduced into appropriate chassis strains to build engineering microorganisms capable of producing products.Subsequently,systems biology tools are used to identify bottleneck pathways,improve strains tolerance and guide design and construction of synthetic microbial consortia,resulting in increasing the yield of engineered strains and constructing microbial cell factories successfully. 展开更多
关键词 Microbial cell factories Systems biology Functional genes/enzymes discovery Bottleneck pathways Strains tolerance Synthetic microbial consortia
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Factory IO在PLC应用技术课程虚拟仿真教学中的应用 被引量:1
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作者 李秀忠 彭一航 +1 位作者 陈思涛 梁宝英 《中国设备工程》 2024年第5期253-255,共3页
提出一种基于Factory IO的PLC应用技术课程虚拟仿真教学方法。根据项目设计任务要求,从Factory IO的部件库中选择合适的零部件绘制虚拟设备图,按设计任务要求对虚拟设备进行手动调试,选择和配置PLC,将虚拟设备的信号连接到PLC I/O接口... 提出一种基于Factory IO的PLC应用技术课程虚拟仿真教学方法。根据项目设计任务要求,从Factory IO的部件库中选择合适的零部件绘制虚拟设备图,按设计任务要求对虚拟设备进行手动调试,选择和配置PLC,将虚拟设备的信号连接到PLC I/O接口。根据项目的知识点和技能点,在TIA博途中选择合适的指令和编程方法进行程序设计。软硬件设计完成后,进行TIA博途与Factory IO的通信设置与连接,运行Factory IO中的虚拟设备,操作相关控制按钮,观察设备运行情况,修改完善设备和程序直到完全满足设计任务要求。 展开更多
关键词 Factory IO PLC应用技术课程 虚拟仿真教学
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基于Factory IO和S7-1500PLC的组装分拣工作站设计与虚拟仿真
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作者 李秀忠 彭一航 +1 位作者 陈思涛 梁宝英 《轻工科技》 2024年第1期101-104,116,共5页
提出一种基于Factory IO的工作站设计与虚拟仿真方法。根据生产工艺要求,从Factory IO部件库中选择合适的零部件,进行工作站设计、安装、参数设置和手动调试。工作站硬件设计完成后,在TIA博途中运用模块化编程方法进行控制程序设计。软... 提出一种基于Factory IO的工作站设计与虚拟仿真方法。根据生产工艺要求,从Factory IO部件库中选择合适的零部件,进行工作站设计、安装、参数设置和手动调试。工作站硬件设计完成后,在TIA博途中运用模块化编程方法进行控制程序设计。软硬件设计完成后,进行TIA博途与Factory IO的通信设置与连接,启动TIA博途与Factory IO,操作相关控制按钮,观察设备运行情况,直到完全满足工作站生产工艺要求。 展开更多
关键词 Factory IO S7-1500PLC 虚拟仿真
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“Eternal Motion” as a “Form of Movement of a Special Nature” and the Main Condition for the Creation of the Universe
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作者 Avas Khugaev Eugeniya Bibaeva 《Journal of Applied Mathematics and Physics》 2024年第6期2041-2068,共28页
The article hypothesizes that DE and DM (UCM) are a “Form of Motion of a Special Nature”, where “Form of Motion” means “Eternal Motion” as the power of dynamics of different levels and varying degrees of self-su... The article hypothesizes that DE and DM (UCM) are a “Form of Motion of a Special Nature”, where “Form of Motion” means “Eternal Motion” as the power of dynamics of different levels and varying degrees of self-sufficiency, and by “Special Nature”, gravitational and two other properties of matter, “tied” to the “Eternal Movement” and completely dependent on it. Carriers of key properties of a “Special Nature” have been established: “0”-DE particles and “3”-DM particles (UDM). The unity of their inherent “motionally-gravitational” properties and the peculiarity of the relationship between “motion” and “gravity” are revealed: the higher the intensity of “Eternal Motion”, the stronger the gravitational properties of matter are manifested (and vice versa). The relationship of “time” with the “vibration frequency” and the “mass” of photons with the “degree of bonding and deformation properties of the field” is shown. The maximum level of gravity has been determined, which allows Nature to successfully create the Universe: such a landmark is the proximity to the property of the Primary Source—the “pure graviton” of the OSP space, the most powerful “motionally-gravitational” particle of the Universe. The reasons for the emergence of such an identity of the gravitational properties of particles with the indicators of a “pure graviton” are established: for “0”-DE particles, this is the acquisition of the function of “freedom of movement”;for “3”-DM particles (UDM), the creation of a special structure—a “double field” (“Main” and “Small”). The presence in the “double field” of specific “tools” for the creation of the worlds of the Universe—gravitational “waves” gives rise to impulses (shocks) of varying intensity and shape. A list of functions performed by “waves” in the “Main” and “Small” fields has been compiled. The specific conditions for the formation of “UDM Streams”, their transformation into a “Vortex” and, under the influence of a powerful Initial Impulse (push), sending them to the “place” of the creation of galaxies, are shown. It is suggested that there is a “Cycle of Matter in Nature” in the closed structure of our Universe due to the “work” of “waves” and the functioning of special “factories” in the form of exotic space objects—Black holes. 展开更多
关键词 DE DM (UCM) Graviton Eternal motion Double Field of the Universe Motionally-Gravitational Particles Degree of Self-Sufficiency Main Field Small Field Gravitational Waves Primary Impulse Flows UDM Vortex Time Massive Photons Clumps of DM Movement of Galaxies factories of Black Holes Circulation of Matter in Nature
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Advances in greenhouse automation and controlled environment agriculture:A transition to plant factories and urban agriculture 被引量:23
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作者 Redmond Ramin Shamshiri Fatemeh Kalantari +5 位作者 K.C.Ting Kelly R.Thorp Ibrahim A.Hameed Cornelia Weltzien Desa Ahmad Zahra Mojgan Shad 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2018年第1期1-22,共22页
Greenhouse cultivation has evolved from simple covered rows of open-fields crops to highly sophisticated controlled environment agriculture(CEA)facilities that projected the image of plant factories for urban agricult... Greenhouse cultivation has evolved from simple covered rows of open-fields crops to highly sophisticated controlled environment agriculture(CEA)facilities that projected the image of plant factories for urban agriculture.The advances and improvements in CEA have promoted the scientific solutions for the efficient production of plants in populated cities and multi-story buildings.Successful deployment of CEA for urban agriculture requires many components and subsystems,as well as the understanding of the external influencing factors that should be systematically considered and integrated.This review is an attempt to highlight some of the most recent advances in greenhouse technology and CEA in order to raise the awareness for technology transfer and adaptation,which is necessary for a successful transition to urban agriculture.This study reviewed several aspects of a high-tech CEA system including improvements in the frame and covering materials,environment perception and data sharing,and advanced microclimate control and energy optimization models.This research highlighted urban agriculture and its derivatives,including vertical farming,rooftop greenhouses and plant factories which are the extensions of CEA and have emerged as a response to the growing population,environmental degradation,and urbanization that are threatening food security.Finally,several opportunities and challenges have been identified in implementing the integrated CEA and vertical farming for urban agriculture. 展开更多
关键词 smart agriculture greenhouse modelling urban agriculture vertical farming automation internet of things(IoT) wireless sensor network plant factories
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基于仿真的构架车间瓶颈识别与人工资源配置优化
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作者 舒云聪 朱海平 +3 位作者 沈继统 閤泰梓 吴向阳 刘念祖 《组合机床与自动化加工技术》 北大核心 2024年第6期1-5,11,共6页
需要生产多种类型构架的复杂车间,在瓶颈工序快速准确识别、人工资源精确配置上存在不合理的问题,提出了一种基于仿真的构架车间瓶颈工序识别与人工资源配置优化的方法。首先,对车间进行细致调研,基于Factory Simulation软件建立仿真模... 需要生产多种类型构架的复杂车间,在瓶颈工序快速准确识别、人工资源精确配置上存在不合理的问题,提出了一种基于仿真的构架车间瓶颈工序识别与人工资源配置优化的方法。首先,对车间进行细致调研,基于Factory Simulation软件建立仿真模型,实现准确模拟现实车间的生产;其次,对仿真模型输出结果中的设备利用率、在制品数量等关键参数进行特征分析,系统地识别瓶颈工序,根据工序特性做出瓶颈优化方案;然后,基于Java语言构建模拟退火算法,设置目标为最小化人工资源配置总数和最小化计划完成总时间,对人工资源配置方案进行优化;最后,验证并确定最终的优化方案。 展开更多
关键词 车间仿真 Factory Simulation 瓶颈识别 人工资源配置 模拟退火
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Optimization of microbial cell factories for astaxanthin production: Biosynthesis and regulations, engineering strategies and fermentation optimization strategies 被引量:4
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作者 Mostafa Basiony Liming Ouyang +11 位作者 Danni Wang Jiaming Yu Liming Zhou Mohan Zhu Xuyuan Wang Jie Feng Jing Dai Yijie Shen Chengguo Zhang Qiang Hua Xiuliang Yang Lixin Zhang 《Synthetic and Systems Biotechnology》 SCIE 2022年第2期689-704,共16页
The global market demand for natural astaxanthin is rapidly increasing owing to its safety,the potential health benefits,and the diverse applications in food and pharmaceutical industries.The major native producers of... The global market demand for natural astaxanthin is rapidly increasing owing to its safety,the potential health benefits,and the diverse applications in food and pharmaceutical industries.The major native producers of natural astaxanthin on industrial scale are the alga Haematococcus pluvialis and the yeast Xanthopyllomyces dendrorhous.However,the natural production via these native producers is facing challenges of limited yield and high cost of cultivation and extraction.Alternatively,astaxanthin production via metabolically engineered non-native microbial cell factories such as Escherichia coli,Saccharomyces cerevisiae and Yarrowia lipolytica is another promising strategy to overcome these limitations.In this review we summarize the recent scientific and biotechnological progresses on astaxanthin biosynthetic pathways,transcriptional regulations,the interrelation with lipid metabolism,engineering strategies as well as fermentation process control in major native and non-native astaxanthin producers.These progresses illuminate the prospects of producing astaxanthin by microbial cell factories on industrial scale. 展开更多
关键词 ASTAXANTHIN Carotenoids Metabolic engineering Microbial cell factories Lipid FERMENTATION ANTIOXIDANTS
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基于PLC和Factory IO的物料分拣和存储控制系统设计
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作者 欧美英 张可可 谷胜伟 《绥化学院学报》 2024年第8期147-151,共5页
在当今的社会,工厂生产大多与分拣密不可分,如今的分拣方式一部分依旧以人工分拣为主,若能使智能分拣充分利用到各个工厂中,实现分拣与存储的智能化,将会大大降低公司的投入成本,显著提高生产效率和公司的综合竞争力。文章利用可编程逻... 在当今的社会,工厂生产大多与分拣密不可分,如今的分拣方式一部分依旧以人工分拣为主,若能使智能分拣充分利用到各个工厂中,实现分拣与存储的智能化,将会大大降低公司的投入成本,显著提高生产效率和公司的综合竞争力。文章利用可编程逻辑控制器(PLC)与Factory IO、组态王、博图(TIA portal)V16共同完成仿真分拣与存储,实现了对不同大小的物料进行识别、运输、存储、输出、计数等功能,对提高工厂的生产效率、公司的整体收益具有重要意义。 展开更多
关键词 自动化 PLC Factory IO 分拣 存储
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Development of fungal cell factories for the production of secondary metabolites:Linking genomics and metabolism 被引量:1
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作者 Jens Christian Nielsen Jens Nielsen 《Synthetic and Systems Biotechnology》 SCIE 2017年第1期5-12,共8页
The genomic era has revolutionized research on secondary metabolites and bioinformatics methods have in recent years revived the antibiotic discovery process after decades with only few new active molecules being iden... The genomic era has revolutionized research on secondary metabolites and bioinformatics methods have in recent years revived the antibiotic discovery process after decades with only few new active molecules being identified.New computational tools are driven by genomics and metabolomics analysis,and enables rapid identification of novel secondary metabolites.To translate this increased discovery rate into industrial exploitation,it is necessary to integrate secondary metabolite pathways in the metabolic engineering process.In this review,we will describe the novel advances in discovery of secondary metabolites produced by filamentous fungi,highlight the utilization of genome-scale metabolic models(GEMs)in the design of fungal cell factories for the production of secondary metabolites and review strategies for optimizing secondary metabolite production through the construction of high yielding platform cell factories. 展开更多
关键词 Secondary metabolism FUNGI Biosynthetic gene clusters Genome mining Metabolic modeling Cell factories
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Functional expression and regulation of eukaryotic cytochrome P450 enzymes in surrogate microbial cell factories 被引量:2
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作者 Pradeepraj Durairaj Shengying Li 《Engineering Microbiology》 2022年第1期17-34,共18页
Cytochrome P450(CYP)enzymes play crucial roles during the evolution and diversification of ancestral monocel-lular eukaryotes into multicellular eukaryotic organisms due to their essential functionalities including ca... Cytochrome P450(CYP)enzymes play crucial roles during the evolution and diversification of ancestral monocel-lular eukaryotes into multicellular eukaryotic organisms due to their essential functionalities including catalysis of housekeeping biochemical reactions,synthesis of diverse metabolites,detoxification of xenobiotics,and con-tribution to environmental adaptation.Eukaryotic CYPs with versatile functionalities are undeniably regarded as promising biocatalysts with great potential for biotechnological,pharmaceutical and chemical industry applica-tions.Nevertheless,the modes of action and the challenges associated with these membrane-bound proteins have hampered the effective utilization of eukaryotic CYPs in a broader range.This review is focused on comprehen-sive and consolidated approaches to address the core challenges in heterologous expression of membrane-bound eukaryotic CYPs in different surrogate microbial cell factories,aiming to provide key insights for better studies and applications of diverse eukaryotic CYPs in the future.We also highlight the functional significance of the previously underrated cytochrome P450 reductases(CPRs)and provide a rational justification on the progression of CPR from auxiliary redox partner to function modulator in CYP catalysis. 展开更多
关键词 Cytochrome P450 enzymes Cytochrome P450 reductase Membrane-bound proteins N-terminal transmembrane domain Heterologous expression Microbial cell factories Redox partners Electron transfer
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My Family Crest
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作者 YU HUA 《China Today》 2024年第4期75-75,共1页
A country has its national emblem,a school has its school badge,and a factory has its factory logo.My family also has its family crest.Is that strange?The crest is a design of a fish carved on a wooden door.The design... A country has its national emblem,a school has its school badge,and a factory has its factory logo.My family also has its family crest.Is that strange?The crest is a design of a fish carved on a wooden door.The design of the fish was drawn so clumsily,with the lines rather messy and rough,that one could only make out a hint of a fish.However,the crest had quite an unusual origin. 展开更多
关键词 UNUSUAL origin. FACTORY
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