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Lead removal from water using organic acrylic amine fiber(AAF)and inorganic-organic P-AAF,fixed bed filtration and surface-induced precipitation

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Journal of Environmental Sciences 2021年第3期33卷 135-144页

作者： Jinshan Wei Lijie Duan Jian Wei Erhard Hoffmann yonghui Song Xiaoguang meng State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Center for Environmental Systems Stevens Institute of TechnologyHobokenNJ 07030USA Department of Aquatic Environmental Engineering Karlsruhe Institute of TechnologyKarsruhe 76131Germany School of Environment Tsinghua UniversityBeijing 100084China

Granular porous sorbents were normally used for heavy metals removal from *** search for the new commercial sorbent and treatment strategy,an organic acrylic amine fiber(AAF)and phosphorus loading inorganic-organic AAF(P-AAF)were prepared and used for lead(Pb)removal from water.A new strategy of inorganic-organic coupling technology was proposed for Pb removal,based on the hypothesis of surface-induced precipitation *** AAF showed a Pb adsorption capacity of 417 mg/g from the Langmuir fitting,while the column filtration technology was further applied to measure the adsorption edge and *** of different initial Pb concentrations,hydraulic retention time,and co-existing P were considered in the filtration *** presence of 0.8 mg/L P in water significantly improved the Pb breakthrough point from 15,000 to 41,000 bed volumes of water spiked with 85μg/L Pb,while the P-AAF fixed bed showed better removal of Pb than AAF SEM/EDX and XRD spectra were employed for determining the surface functional groups and the formation of surface-induced precipitation of pyromorphite(Pb_5(PO_4)_3 OH)on *** study verified the application of AAF sorbent for Pb removal and the enhanced effect of coating P on AAF,thus improved our fundamental understanding and application of the surface chemistry process of Pb with P.

关键词： Lead removal Adsorption Fixed bed filtration Acrylic amine fiber Inorganic-organic sorbent Surface-induced precipitation

德技并修视域下墨家思想融入高职人才培养的路径研究

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职业技术教育 2024年第14期45卷 35-40页

作者：周如川吴泳慧华中师范大学教育学院武汉430079 东莞职业技术学院江西师范大学教育学院

德技并修是新时代职业教育改革发展的重要使命,培养“厚乎德行、辩乎言谈、博乎道术”的“兼士”是墨家人才培养目标。古老的墨家思想从平等博爱、不嫌鄙事、培养“兼士”三个方面奠定了新时代职业教育人才培养的精神底色。在历史长河... 详细信息

德技并修是新时代职业教育改革发展的重要使命,培养“厚乎德行、辩乎言谈、博乎道术”的“兼士”是墨家人才培养目标。古老的墨家思想从平等博爱、不嫌鄙事、培养“兼士”三个方面奠定了新时代职业教育人才培养的精神底色。在历史长河中形成的德以为先的道德教育内容、技以为本的实践教育导向,蕴藏了新时代高职教育德技并修的文化基因。现代高职教育可以从五个维度做好人才培养工作,即抓好“立德树人”,落实根本任务;讲好“职教故事”,提升社会认同;强调“关键能力”,关注实践养成;推动“三教改革”,创新人才培养;矢志服务社会,增进“全球福祉”。古为今用,让优秀传统文化真正服务于职业教育人才培养。

关键词：德技并修墨家思想高职人才培养五维路径

Adsorption equilibrium for Z-ligustilide on C18-bonded silica from supercritical carbon dioxide

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Chinese Journal of Chemical Engineering 2016年第12期24卷 1680-1686页

作者： Huisheng Lü Shuangyan Liu yonghui Li Fanmei meng Dawei Yao Xufei Mo Key Laboratory for Green Chemical Technology of Ministry of Education Tianjin University R&D Center for Petrochemical Technology

Adsorption equilibrium is of great importance for the preparative supercritical fluid chromatography(pre-SFC) in defining supercritical adsorption behavior and the industrial *** paper presents adsorption isotherms of Z-ligustilide from supercritical carbon dioxide(SC-CO_2) on C18-bonded *** behavior was studied at 305.15 K,313.15 K and 323.15 K with SC-CO_2 density varying from 0.687 g·cm^(-3) to0.863 g·cm^(-3) with the elution by characteristic points(ECP) *** adsorption amount of Z-ligustilide from SC-CO_2 on C18-bonded silica decreased with the increasing density of the mobile phase as well as the increasing *** equilibrium data were fitted by Langmuir and Freundlich isotherm models,and the Langmuir isotherm model performed better for describing the whole adsorption process on the *** monolayer saturation adsorption capacity of Z-ligustilide is in the range of 3.0 × 10^(-4) mg·cm^(-3) to5.5 × 10^(-4) mg·cm^(-3) with an average value of 4.0 × 10^(-4) mg·cm^(-3).

关键词： Z-ligustilide C18-bonded silica Pre-SFC Adsorption equilibrium Isotherm model

经皮内镜胃造瘘术在肌萎缩侧索硬化患者中的应用价值

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中华老年医学杂志 2024年第5期43卷 646-650页

作者：马玉环黄永辉北京大学第三医院消化科北京100083

经皮内镜胃造瘘术(PEG)是一种常见的用以提供肠内营养的方式,适用于需要长期肠内营养的患者。PEG的临床应用涵盖多个领域,包括神经肌肉疾病、消化系统疾病、恶性肿瘤和慢性疾病等。其中肌萎缩侧索硬化(ALS)是重要的适应证之一,ALS是一... 详细信息

经皮内镜胃造瘘术(PEG)是一种常见的用以提供肠内营养的方式,适用于需要长期肠内营养的患者。PEG的临床应用涵盖多个领域,包括神经肌肉疾病、消化系统疾病、恶性肿瘤和慢性疾病等。其中肌萎缩侧索硬化(ALS)是重要的适应证之一,ALS是一种进行性神经肌肉疾病,好发于中老年人,常导致吞咽困难和营养不良。研究表明,通过PEG提供肠内营养可以改善ALS患者的预后和生存期。本文将综述PEG在ALS患者中的临床应用价值。

关键词：经皮内镜胃造瘘术肌萎缩侧索硬化吞咽困难肠内营养

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零售业务降低了银行风险承担吗?

国际金融研究 2024年第1期 51-61页

作者：廉永辉高佳伟张琳首都经济贸易大学金融学院北京工商大学经济学院

在商业银行零售转型的大背景下,本文基于2008—2021年我国434家商业银行非平衡面板数据,实证检验零售业务对银行风险承担的影响。结果发现:零售业务能够显著降低银行风险承担。异质性分析表明,对于规模较大、资本充足率较低、金融科技... 详细信息

在商业银行零售转型的大背景下,本文基于2008—2021年我国434家商业银行非平衡面板数据,实证检验零售业务对银行风险承担的影响。结果发现:零售业务能够显著降低银行风险承担。异质性分析表明,对于规模较大、资本充足率较低、金融科技发展程度较高的银行,零售业务对风险承担的降低效应更强。对作用渠道的分析表明:零售业务能够提高银行的盈利水平和资本充足率,降低银行盈利的波动性,对银行风险承担产生抑制作用。进一步区分零售业务类型发现:除个人住房贷款业务和个人经营性贷款业务外,其余各类零售业务均能降低银行风险承担。此外本文还发现:零售业务质量越高,银行风险承担水平越低。

关键词：零售业务商业银行风险承担

海上风电场经柔直送出系统的虚拟导纳中频振荡抑制策略

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电力系统保护与控制 2024年第9期52卷 36-45页

作者：聂永辉张瑞东周勤勇高磊东北电力大学吉林吉林132012 中国电力科学研究院有限公司北京100192

随着柔性直流输电技术在远海风电的广泛应用,海上换流站接入远海风电场时出现了中频振荡现象,严重危害系统安全稳定运行。为此,提出了一种基于虚拟导纳的中频振荡抑制策略。首先,采用模块化状态空间法建立了海上风电场经柔直送出系统的... 详细信息

随着柔性直流输电技术在远海风电的广泛应用,海上换流站接入远海风电场时出现了中频振荡现象,严重危害系统安全稳定运行。为此,提出了一种基于虚拟导纳的中频振荡抑制策略。首先,采用模块化状态空间法建立了海上风电场经柔直送出系统的小信号模型。然后,采用参与因子分析方法揭示了影响中频振荡的关键因素,并分析了各关键因素对中频振荡的影响特性。在此基础上,提出在柔直控制系统中添加虚拟导纳的阻尼控制策略,并基于阻尼控制器对中频、LCL振荡的差异影响划分了控制器参数的稳定域。最后,在Matlab/Simulink中搭建时域仿真模型。结果表明,所提策略在系统不同运行工况下均可有效抑制中频振荡,提高了系统稳定性。

关键词：海上风电场柔性直流中频振荡模块化状态空间法虚拟导纳

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基于格拉姆角差场和迁移残差网络的HVDC线路故障识别

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电力建设 2024年第8期45卷 118-127页

作者：赵妍孙延聂永辉东北电力大学输变电技术学院吉林省吉林市132012 东北电力大学电气工程学院吉林省吉林市132012

为了提高高压直流(high voltage direct current,HVDC)输电线路在样本数量不足和高阻抗条件下的识别准确率,提出了一种基于格拉姆角差场(Gramian angular difference field,GADF)和迁移残差网络(ResNet18)结合的高压直流输电线路故障识... 详细信息

为了提高高压直流(high voltage direct current,HVDC)输电线路在样本数量不足和高阻抗条件下的识别准确率,提出了一种基于格拉姆角差场(Gramian angular difference field,GADF)和迁移残差网络(ResNet18)结合的高压直流输电线路故障识别方法。首先利用格拉姆角差场将一维时序信号转化为二维角差场图,然后将在源域ImageNet-1K数据集上训练好的ResNet18模型的权重参数迁移至以角场图为目标域的ResNet18模型中,自适应提取故障相关特征,进行故障类型识别。实验结果证明:相较于其他深度学习方法,所提方法在小样本条件下能够正确识别区内正极接地故障、区内负极接地故障、区内双极短路故障和区外故障,识别准确率达到99.67%,并且具有较强的耐受过渡电阻能力、抗噪性和泛化性。

关键词：高压直流输电线路格拉姆角差场(GADF) 残差网络迁移学习故障识别

Multi-objective regulation in autohydrolysis process of corn stover by liquid hot water pretreatment

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Chinese Journal of Chemical Engineering 2017年第4期25卷 499-506页

作者： Huisheng Lü Xingfang Shi yonghui Li Fanmei meng Shuangyan Liu Li Yan Key Laboratory for Green Chemical Technology of Ministry of Education Tianjin University R&D Center for Petrochemical TechnologyTianjin UniversityTianjin 300072China

Increasing reducing sugars(xylose and glucose) yield for bioethanol from corn stover depends strongly on optimization of pretreatment conditions. The optimum reaction conditions of two-stage liquid hot water(LHW) pretreatment based on total sugars yield were investigated. Under optimal conditions, the recovery of glucose of corn stover after two-stage LHW pretreatment and 72 h enzymatic digestion, reached 89.55%. In addition, acetic acid-rich spent liquor pretreatment and one-stage LHW pretreatment have been carried out to make comparisons with two-stage LHW treatment. Glucose yield 89.55% is superior to the recovery 83.38% using acetic acidrich spent liquor pretreatment or 80.58% using one-stage LHW pretreatment. The production of total sugars was increased by 7.8% when compared with one-stage pretreatment. Moreover, the structural features of the treated corn stover solid residues were also investigated by XRD and SEM technology in order to clarify the effects of the reaction on corn stover. The results indicated that the two-stage LHW pretreatment was an effective pretreatment method of corn stover to get most massive resource utilization, and it could be successfully applied to corn stover.

关键词： pretreatment liquor digestion hydrolysis acetic phenols spent cellulose biomass untreated

Canonical and noncanonical Wnt signaling: Multilayered mediators, signaling mechanisms and major signaling crosstalk

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Genes & Diseases 2024年第1期11卷 103-134页

作者： Kevin Qin Michael Yu Jiaming Fan Hongwei Wang Piao Zhao Guozhi Zhaoo Wei Zeng Connie Chen yonghui Wang Annie Wang Zander Schwartz Jeffrey Hong Lily Song William Wagstaff Rex C.Haydon Hue H.Luu Sherwin H.Ho Jason Strelzow Russell R.Reid Tong-Chuan He Lewis L.Shi Chicago Medical School Rosalind Franklin University of Medicine and ScienceNorth ChicagoIL 60064USA Molecular Oncology Laboratory Department of Orthopaedic Surgery and Rehabilitation MedicineThe University of Chicago Medical CenterChicagoIL 60637USA Ministry of Education Key Laboratory of Diagnostic Medicine and Department of Clinical BiochemistryThe School of Laboratory MedicineChongqing Medical UniversityChongqing 400016China Departments of Orthopaedic Surgery and Urology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Interventional Neurology The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanGuangdong 523475China Department of Clinical Laboratory Medicine Shanghai Jiaotong University School of MedicineShanghai 200000China School of Biomedical Engineering Vanderbilt UniversityNashvilleTN 37235USA Laboratory of Craniofacial Biology and Development Department of Surgery Section of Plastic SurgeryThe University of Chicago Medical CenterChicagoIL 60637USA

Wnt signaling plays a major role in regulating cell proliferation and *** Wnt ligands are a family of 19 secreted glycoproteins that mediate their signaling effects via binding to Frizzled receptors and LRP5/6 coreceptors and transducing the signal either throughβ-catenin in the canonical pathway or through a series of other proteins in the nonca-nonical *** of the individual components of both canonical and noncanonical Wnt signaling have additional functions throughout the body,establishing the complex interplay between Wnt signaling and other signaling *** crosstalk between Wnt signaling and other pathways gives Wnt signaling a vital role in many cellular and organ ***-regulation of this system has been implicated in many diseases affecting a wide array of organ systems,including cancer and embryological defects,and can even cause embryonic *** complexity of this system and its interacting proteins have made Wnt signaling a target for many therapeutic ***,both stimulatory and inhibitory treatments come with potential risks that need to be *** review synthesized much of the current knowl-edge on the Wnt signaling pathway,beginning with the history of Wnt *** thoroughly described the different variants of Wnt signaling,including canonical,noncanonical Wnt/PCP,and the noncanonical Wnt/Ca2+*** description involved each of its components and their involvement in other cellular ***,this review explained the various other pathways and processes that crosstalk with Wnt signaling.

关键词： β-catenin Canonical Wnt Noncanonical Wnt Signal transduction Signaling crosstalk