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Dual-radiation-chamber coordinated overall energy efficiency scheduling solution for ethylene cracking process regarding multi-parameter setting and multi-flow allocation

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Chinese Journal of Chemical Engineering 2021年第6期34卷 180-197页

作者： Di meng Cheng Shao li Zhu Institute of Advanced Control Technology Dalian University of TechnologyDalian 116024China

Ethylene cracking process is the core production process in ethylene industry,and is paid more attention to reduce high energy *** of the interdependent relationships between multi-flow allocation and multi-parameter setting in cracking process,it is difficult to find the overall energy efficiency scheduling for the purpose of saving *** traditional scheduling solutions with optimal economic benefit are not applicable for energy efficiency scheduling issue due to the neglecting of recycle and lost energy,as well as critical operation parameters as coil outlet pressure(COP)and dilution *** addition,the scheduling solutions mostly regard each cracking furnace as an elementary unit,regardless of the coordinated operation of internal dual radiation chambers(DRC).Therefore,to improve energy utilization and production operation,a novel energy efficiency scheduling solution for ethylene cracking process is proposed in this ***,steam heat recycle and exhaust heat loss are considered in cracking process based on 6 types of extreme learning machine(ELM)based cracking models incorporating DRC operation and three operation parameters as coil outlet temperature(COT),COP,and dilution ratio according to semi-mechanism *** to provide long-term decision-making basis for energy efficiency scheduling,overall energy efficiency indexes,including overall output per unit net energy input(OONE),output-input ratio per unit net energy input(ORNE),exhaust gas heat loss ratio(EGHL),are designed based on input-output analysis in terms of material and energy ***,a multiobjective evolutionary algorithm based on decomposition(MOEA/D)is employed to solve the formulated multi-objective mixed-integer nonlinear programming(MOMINLP)*** validities of the proposed scheduling solution are illustrated through a case *** scheduling results demonstrate that an optimal balance between multi-flow allocation,multi-parameter setting,and D

关键词： Ethylene cracking process Energy efficiency scheduling Overall energy efficiency indexes Dual radiation chamber Multiple operation parameters Multiple energy flows

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Optimization and improvement of ac resistance calculation method for multi-phase parallel-wiring cables

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Chinese Journal of Aeronautics 2022年第3期35卷 356-366页

作者： Yaojia ZHANG li WANG Lexuan meng Department of Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China AC Systems Power Grid DivisionABBStockholm 16254Sweden

Parallel-wiring cables are often used in multi-phase AC aircraft Electrical Power Systems(EPSs).However,it complicates the ac resistance *** solve this issue,an analytical resistance calculation method for parallel-wiring cables in multi-phase EPS was ***,the existing calculation formula of proximity factor was optimized,and the calculation error was reduced from 16%to 2%when two conductors are close to each ***,the superposition effect on current density distribution between multi-conductors was considered based on orthogonal decomposition method,and the position of the equivalent charged points were easily ***,the ac resistance calculation formula was derived according to characteristics of parallel-wiring strategy,and the general ac resistance calculation methods of multi-phase parallel-wiring cables were *** proposed approach considerably enhances the applicability of ac resistance analytical calculation method for multi-conductor *** to the accuracy of the proposed method,it can be used in many cases to avoid case-by-case simulation work and facilitate efficient system design and analysis.

关键词： AC resistance Main feeder Orthogonal decomposition Parallel-wiring strategy Proximity effect

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Optimizing air purification for household particulate matters using sensor-based and time-based intervention strategies

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Particuology 2023年第8期79卷 78-84页

作者： meng Wang Tianjun Lu Yang li Department of Epidemiology and Environmental Health School of Public and Health ProfessionsUniversity at BuffaloBuffalo14214USA Department of Earth Science and Geography California State UniversityDominguez HillsCarson90747USA Department of Environmental Science Baylor UniversityWaco76798USA

Filtration efficiency of portable air cleaner(PAC)is affected by resident perceptions and adherences to when and how to operate the *** PAC with smart control and sensor technology holds the promise to effectively reduce indoor air *** study aims to evaluate the efficiency of a PAC at removing indoor fine particulate matters(PM_(2.5))exposure under two automated operation settings:(1)a time-based mode in which the operation time is determined based on perceived time periods of indoor pollution by residents;(2)a sensor-based mode in which an air sensor monitor is used to determine the PAC based on the actual PM_(2.5) level against the indoor air quality *** study was conducted in a residential room for 55 days with a rolling setting on PAC(no filtration,sensor-based,time-based fil-trations)and a continuous measurement of PM_(2.5).We found that the PAC operated with sensor-based mode removed PM_(2.5) concentrations by 47%and prolonged clean air(<35 μg/m^(3))period by 23%compared to the purifications with time-based mode which reduced PM_(2.5) by 29%and increased clean air period by 13%.The sensor-based filtration identified indoor pollution episodes that are hardly detected by personal *** study findings support an automated sensor-based approach to optimize the use of PAC for effectively reducing indoor PM_(2.5) exposure.

关键词： Aircleaner Particulate matter Sensor-based filtration Time-based filtration Indoor pollution

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Regulation of hematopoietic stem cells in the niche

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Science China(life Sciences) 2015年第12期58卷 1209-1215页

作者： ZHAO meng li linHeng Stowers Institute for Medical Research Department of Pathology & Laboratory Medicine University of Kansas Medical Center

Hematopoiesis provides a suitable model for understanding adult stem cells and their niche. Hematopoietic stem cells(HSCs) continuously produce blood cells through orchestrated proliferation, self-renewal, and differentiation in the bone marrow(BM). Within the BM exists a highly organized microenvironment termed "niche" where stem cells reside and are maintained. HSC niche is the first evidence that a microenvironment contributes to protecting stem cell integrity and functionality in mammals. Although multiple models exist, recent progress has principally elucidated the cellular complexity of the HSC niche that maintains and regulates HSCs in BM. Here we introduce the development and summarize the achievements of HSC niche studies.

关键词： hematopoietic stem cells niche regeneration

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All-in-one strategy: overcome the challenges in the device enlargement of perovskite solar cells

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Science China Chemistry 2022年第7期65卷 1223-1224页

作者： Lei meng Yongfang li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

In recent years, perovskite solar cells(pero-SCs) have gained tremendous development with power conversion efficiency(PCE) reaching 25.7% [1]. Based on its low process cost and high efficiency, pero-SC is now consider... 详细信息

关键词： perovskite overcome gained

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Pluripotent stem cell derived inhibitory interneurons–principles and applications in health and disease

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Neural Regeneration Research 2020年第2期15卷 251-252页

作者： Francesca Keefe meng li Neuroscience and Mental Health Research Institute School of Medicine and School of Bioscience Cardiff University

Inhibitory interneurons are gamma-aminobutyric acid-ergic (GABAergic) nerve cells that act to maintain the appropriate excitation-inhibition balance, and synchronise the output of principle cells to generate rhythmic patterns of firing (Kessaris et al., 2014). This critical role, along with their brain-wide distribution, has led to the implication of interneurons in many neuropathologies, including schizophrenia, autism, dystonia and epilepsies (Marín, 2012).

关键词： cells act has led

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凡纳对虾parkin共调基因和parkin在抗白斑综合征病毒中的表达分析和SNP开发

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渔业科学进展 2025年第1期46卷 194-209页

作者：薛倩李旭鹏李洋栾生罗坤孔杰邢群孟宪红浙江海洋大学水产学院浙江舟山316021 海水养殖生物育种与可持续产出全国重点实验室中国水产科学研究院黄海水产研究所山东青岛266071 青岛海洋科技中心海洋渔业科学与食物产出过程功能实验室山东青岛266237 邦普种业科技有限公司山东潍坊261311

本实验室前期研究中基于全基因组关联分析(GWAS)方法筛选到抗白斑综合征病毒(WSSV)候选基因:parkin共调基因(PACRG)。PACRG与帕金森病相关基因parkin共用一个双向启动子,二者共同参与细胞自噬过程,从而在细胞保护方面发挥作用。本研究... 详细信息

本实验室前期研究中基于全基因组关联分析(GWAS)方法筛选到抗白斑综合征病毒(WSSV)候选基因:parkin共调基因(PACRG)。PACRG与帕金森病相关基因parkin共用一个双向启动子,二者共同参与细胞自噬过程,从而在细胞保护方面发挥作用。本研究对凡纳对虾(Penaeus vannamei)PACRG和parkin在抗WSSV中的功能进行探讨,对其mRNA和氨基酸序列进行特征分析,利用real-timePCR技术检测对虾感染WSSV后不同时间、不同组织中PACRG和parkin的表达水平。通过荧光原位杂交技术(FISH)进行空间定位。利用PCR和Sanger测序技术获得单核苷酸多态性位点(SNP)并进行抗WSSV的关联分析。结果显示,PACRG开放阅读框(ORF)全长600bp,编码199个氨基酸,预测包含一个ParcG结构域。parkinORF序列全长1653bp,编码550个氨基酸,预测包含UBQ、IBR结构域和一个信号肽结构。与多物种进行同源序列比对发现,凡纳对虾PACRG氨基酸序列与日本对虾(Penaeus japonicus)的同源性高达89.70%;凡纳对虾parkin氨基酸序列与中国对虾(Penaeus chinensis)和斑节对虾(Penaeus monodon)的同源性高达93.45%。PACRG和parkin蛋白的保守性较高。感染WSSV后,PACRG和parkin在对虾肝胰腺、鳃、肌肉和眼柄中的表达水平发生显著变化,其中,眼柄中PACRG和parkin表现出极相似的组织表达模式。在肌肉中,PACRGmRNA和WSSV在空间位置上呈现高度重叠状态。结合上述结果,推测PACRG和parkin在凡纳对虾与WSSV的互作中发挥功能。在PACRG中筛选到2个SNP位点,在parkin中筛选到15个SNP位点,其中位于parkin非翻译区(UTR)的5个SNP位点与抗WSSV性状显著相关。本文为研究凡纳对虾抗WSSV的分子机制和抗病分子育种提供了理论依据和参考数据。

关键词：凡纳对虾白斑综合征病毒(WSSV) parkin共调基因(PACRG) parkin基因 SNP

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Identification of Key Blood Biomarkers linking Di(2-ethylhexyl)Phthalate and Autoimmune Diseases in Adolescents Mice

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Biomedical and Environmental Sciences 2024年第5期37卷 521-525页

作者： XU Xiao Mei li Xiao Lu HU die CAI Xiao Yue li Qi meng ZHENG Yuan Zhuo CAI Yang QI Yin Yin XU Tao ZHAO ling li NING Xia Department of Infectious Diseases Anhui Provincial Children’s HospitalHefei 231000AnhuiChina Department of Toxicology School of Public HealthKey Laboratory of Environmental Toxicology of Anhui Higher Education InstitutesAnhui Medical UniversityHefei 231000AnhuiChina School of Biology Food and EnvironmentHefei UniversityHefei 230601AnhuiChina

Di(2-ethylhexyl)phthalate(DEHP)is a widely used plasticizer known for its reproductive developmental and immune system toxicity,mainly through esophagal,dermal,and respiratory exposure^([1-3]).Maternal exposure to DEHP during pregnancy can lead to adverse birth outcomes in offspring,including impacts on the thyroid system of adolescent offspring^([2-4]).

关键词： Blood respiratory pregnancy

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The Twisted Homology of Simplicial Set

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1781-1802页

作者： meng meng ZHANG Jing Yan li Jie WU School of Mathematical Sciences Hebei Normal UniversityShijiazhuang 050024P.R.China Yanqi Lake Beijing Institute of Mathematical Sciences and Applications Beijing 101408P.R.China

In this article,we give a generalization of δ-twisted homology introduced by Jingyan li,Vladimir Vershinin and Jie Wu,called Δ-twisted homology,which enriches the theory of δ-(co)homology introduced by Alexander Grigor’yan,Yuri Muranov and Shing-Tung *** show that the Mayer-Vietoris sequence theorem holds for Δ-twisted *** the Δ-twisted ideas to Cartesian products,we introduce the notion of Δ-twisted Cartesian product on simplicial sets,which generalizes the classical work of Barratt,Gugenheim and Moore on twisted Cartesian products of simplicial *** certain hypothesis,we show that the coordinate projection of Δ-twisted Cartesian product admits a fibre bundle structure.

关键词： Simplicial set Δ-Twisted homology Homotopy type Fibre bundle

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Hidden correlation of the effect mechanism on chronic gastritis treated with ginger-isolated moxibustion at different single acupoints

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World Journal of Acupuncture-Moxibustion 2019年第1期29卷 48-54页

作者： Jun-wei GU Xuming YANG Qi li Muen GU meng-die WU Shu-fei CAO Jing li Shanghai Yueyang hospital of Integrated Traditional Chinese and Western Medicine Shanghai University of Traditional Chinese MedicineShanghai 200437China Shanghai University of Traditional Chinese Medicine Shanghai 201023China Clinic of Laochenghuangmiao Tonghaichuntang Clinic Shanghai 200010China

Objective: To observe the differences in the effects and mechanisms on chronic gastritis treated by ginger-isolated moxibustion at Zúsānlǐ(足三里ST 36) and Nèiguān(内关PC 6).Methods: A total of 60 eligible patients of chronic gastritis were randomized into two groups, a ST 36 group(ginger-isolated moxibustion at ST 36, 30 cases) and a PC 6 group(ginger-isolated moxibustion at PC 6, 30 cases). Before and after 6 treatments, the total variability of heart rate(TV) and the scores in Scale for gastrointestinal diseases of traditional Chinese medicine were determined and recorded. Using correlation analysis, the hidden correlation condition that affects the therapeutic outcomes was excavated from the data. With least square method, the gradient curve(K value) of TV in treatment was estimated and the correlation between the effect mechanism and autonomic nerve regulation was ***: ① In ST 36 group, the duration of sickness, severity of disease and the activity of autonomic nerve before treatment presented the underlying correlation with the therapeutic effects. In contrast, the hidden correlation in PC 6 group was not clear. ② In ST 36 group, the higher K value of TV in treatment was, the more significant the therapeutic effects were, but in PC group, K value was reversely related to the therapeutic ***: The therapeutic effects of ginger-isolated moxibustion at single acupoint are correlated with the duration and severity of sickness. The therapeutic effects in ST 36 group were improved by the modulation of autonomic nerve activity and the effects in PC 6 group were negatively correlated with autonomic nerve activity. It is deduced that the effect mechanisms are different on single acupoint for chronic gastritis between the two points.

关键词： Isolated ginger moxibustion Chronic gastritis Data mining Association algorithm

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