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Amino acids modified nanoscale zero-valent iron:Density functional theory calculations,experimental synthesis and application in the Fenton-like degradation of organic solvents

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Journal of Environmental Sciences 2024年第1期135卷 296-309页

作者： Xingchen Yang Fucheng Ming jianlong wang Lejin Xu Department of Nuclear Engineering and Technology School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China Beijing Key Laboratory of Radioactive Wastes Treatment Tsinghua UniversityBeijing 100084China

To improve the adsorption and catalytic performance of heterogeneous Fenton-like catalysts for oil wastes,amino acids were used to modify nanoscale zero-valent iron(AA@Fe^(0)),which were applied in the Fenton-like degradation of organic solvents(tributyl phosphate and n-dodecane,named TBP and DD).Twelve amino acids,i.e.,glycine(Gly),alanine(Ala),leucine(Leu),proline(Pro),phenylalanine(Phe),methionine(Met),cysteine(Cys),asparagine(Asn),serine(Ser),glutamic acid(Glu),lysine(Lys)and arginine(Arg),were selected and calculated by density functional theory(DFT).The optimized structure,charge distribution,the highest occupied molecular orbital(HOMO),the lowest unoccupied molecular orbital(LUMO),interaction region indicator(IRI)isosurface map and adsorption energy of AA@Fe^(0),AA@Fe^(0)-TBP and AA@Fe^(0)-DD were studied,which indicated that Fe is more likely to approach and charge transfer with-COO and-NH_(3) on theα-carbon of amino *** is strong attraction between Fe and–COO,and Van der Waals force between Fe and-NH_(3),*** the interaction of AA@Fe^(0)with TBP and DD,Van der Waal force plays an important ***@Fe^(0)was synthesized in laboratory and characterized to investigate physicochemical *** Fenton-like degradation of organic solvents,the change of COD in water phase during the degradation process as well as the volume of the organic phase after the reaction were *** results of calculations combined with experiments showed that Ser-modified Fe^(0)performed the best in these amino acids,with 98%removal of organic solvents.A possible catalytic mechanism was proposed in which amino acids acted a linking role between Fe and organic solvents,activating H_(2)O_(2)to generate hydroxyl radicals for the degradation of organic solvents.

关键词： Amino acids Nanoscale zero-valent iron Density functional theory Organic solvents Fenton-like degradation

Solubility determination and comparison ofβ-HMX and RDX in two binary mixed solvents(acetonitrile+water,nitric acid+water)

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Chinese Journal of Chemical Engineering 2024年第5期69卷 238-249页

作者： Yuehua Yao Fan wang Yinguang Xu Zishuai Xu Lizhen Chen jianlong wang School of Chemistry and Chemical Engineering North University of ChinaTaiyuan 030051China Gansu Yinguang Chemical Industry Group Co.Ltd. Baiyin 730900China

In order to remove hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX),the main impurity,in process of polymorphic transformation of octrahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX),the solubility ofβ-HMX and RDX in acetonitrile(ACN)+water in the temperature range of 288.15-333.15 K and in nitric acid(HNO_(3))+water in the temperature range of 298.15-333.15 K were measured by laser dynamic *** results showed that the solubility of bothβ-HMX and RDX in binary mixed solvents increased monotonously as the temperature increase at a given solvent composition or with increasing of mole fraction of solvent(ACN and nitric acid).Solubility data were well correlated by the modified Apelblat equation,Jouyban-Acree model,Yaws equation and van't Hoff equation,and the Yaws equation achieved the best fitting results according to the relative error and the mean square error ***,the solubility ofβ-HMX and RDX in binary mixed solvent was compared,based on the solubility difference and the solvent's own properties,the best separation degree ofβ-HMX and RDX was found when the mole fraction of nitric acid was 0.22 at room temperature,which provided data support for HMX crystallization in mixed *** solubility differences between RDX andβ-HMX in mixed solvents were explained from the formation of intermolecular and intramolecular hydrogen bonds.

关键词： Solubility Octrahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine Hexahydro-1,3,5-trinitro-1,3,5-triazine Separation Model Hydrogen bond

Magnetic-field-assisted triboelectric nanogenerator for harvesting multi-directional wave energy

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Nano Research 2024年第8期17卷 7144-7152页

作者： Mengru Ding jianlong wang Da Zhao Hengyu Li Xiaojun Cheng Jianming Wen Zhong Lin wang and Tinghai Cheng Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China Guangzhou Institute of Blue Energy Guangzhou 510555China College of Engineering Zhejiang Normal UniversityJinhua 321004China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

Ocean wave energy is a significant and promising source of renewable ***,the energy harvesting is challenging due to the multi-directional nature of *** paper proposes a magnetic-field-assisted triboelectric nanogenerator(MFATENG)for harvesting multi-directional wave *** incorporating a magnetic field,the planar motion of the pendulum is converted into spatial motion,increasing the triggering of multilayered TENG(M-TENG)and enhancing the output energy of the *** results demonstrate that the output energy of the MFA-TENG is increased by 73%by utilizing the magnetic ***,a spring model based on the origami-structured M-TENG is established to analyze the effect of different equivalent stiffnesses on the performance of the M-TENG,aiming to obtain optimal output *** results showcase the impressive output performance of the M-TENG,generating outputs of 250 V,18μA,and 255 ***,the proposed MFA-TENG effectively harvests multi-directional wave energy under water-wave driven *** study significantly enhances the ability of the MFA-TENG to harvest multi-directional wave energy and presents a promising approach for self-powered marine monitoring in the future.

关键词： triboelectric nanogenerator magnetic-field-assisted spring model multi-directional wave energy

^(18)F-prostate specific membrane antigen positron emission tomography/computerized tomography for lymph node staging in medium/high risk prostate cancer:A systematic review and meta-analysis

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Chinese Medical Journal 2024年第8期137卷 949-958页

作者： Zhengtong Lv Liuqi Song Miao wang Huimin Hou Haodong Li Xuan wang Jianye wang jianlong wang Ming Liu Department of Urology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Graduate School of Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100730China Peking University Fifth School of Clinical Medicine Beijing 100730China Peking University China-Japan Friendship School of Clinical Medicine Beijing 100029China

Background:Lymph node staging of prostate cancer(PCa)is important for planning and monitoring of treatment.^(18)F-prostate specific membrane antigen positron emission tomography/computerized tomography(^(18)F-PSMA PET/CT)has several advantages over^(68)Ga-PSMA PET/CT,but its diagnostic value requires further *** meta-analysis focused on establishing the diagnostic utility of^(18)F-PSMA PET/CT for lymph node staging in medium/high-risk ***:We searched the EMBASE,PubMed,Cochrane library,and Web of Science databases from inception to October 1,*** cancer,^(18)F,lymph node,PSMA,and PET/CT were used as search terms and the language was limited to *** additionally performed a manual search using the reference lists of key *** and study characteristics were extracted and the QUADAS-2 tool was employed to evaluate the quality of included ***,specificity,the positive and negative likelihood ratio(PLR and NLR),diagnostic odds ratio(DOR),area under the curve(AUC),and 95%confidence interval(CI)were used to evaluate the diagnostic value of^(18)F-PSMA PET/*** 17 software was employed for calculation and statistical ***:A total of eight diagnostic tests including 734 individual samples and 6346 lymph nodes were included in this *** the patient level,the results of each consolidated summary were as follows:sensitivity of 0.57(95%CI 0.39-0.73),specificity of 0.95(95%CI 0.92-0.97),PLR of 11.2(95%CI 6.6-19.0),NLR of 0.46(95%CI 0.31-0.68),DOR of 25(95%CI 11-54),and AUC of 0.94(95%CI 0.92-0.96).At the lesion level,the results of each consolidated summary were as follows:sensitivity of 0.40(95%CI 0.21-0.62),specificity of 0.99(95%CI 0.95-1.00),PLR of 40.0(95%CI 9.1-176.3),NLR of 0.61(95%CI 0.42-0.87),DOR of 66(95%CI 14-311),and AUC of 0.86(95%CI 0.83-0.89).Conclusions:^(18)F-PSMA PET/CT showed moderate sensitivity but high specificity in lymph node staging of medium/high-risk *** diag

关键词： ^(18)F-PSMA PET/CT Diagnostic test Lymph node Meta-analysis Prostate cancer

新能源汽车何以驱动可再生能源技术创新?——基于双重差分模型的检验

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产业经济研究 2024年第2期 115-129页

作者：王健龙王伟龙刘勇四川大学经济学院四川成都610065

可再生能源技术创新是摆脱化石能源依赖、实现能源绿色低碳转型的关键路径。新能源汽车为能源转型提供了时代机遇,具备诱发城市可再生能源技术创新的潜力。基于中国284个城市2006—2020年的平衡面板数据,以新能源汽车推广应用城市建设... 详细信息

可再生能源技术创新是摆脱化石能源依赖、实现能源绿色低碳转型的关键路径。新能源汽车为能源转型提供了时代机遇,具备诱发城市可再生能源技术创新的潜力。基于中国284个城市2006—2020年的平衡面板数据,以新能源汽车推广应用城市建设为准自然实验,构建了双重差分模型,识别并检验了新能源汽车影响可再生能源技术创新的作用机制及其异质性。研究发现,试点政策显著提升了城市可再生能源技术创新水平,且该结论得到PSM-DID、Goodman-Bacon分解、安慰剂检验等多轮稳健性测试的支持。异质性分析表明,在节能减排约束力度更大、自然资源依赖程度更深和知识产权保护强度更高的城市,试点政策对可再生能源技术创新的提升效果更强。此外,政府引领驱动、制度环境推动和能源消费拉动是重要的影响机制。因此,在试点城市建设过程中,中国政府需总结经验,切实结合城市能源资源禀赋,不断探索试点政策推进可再生能源技术创新的靶向路径,持续释放创新红利以驱动能源转型。

关键词：新能源汽车可再生能源技术创新政府引领制度环境能源消费双重差分模型

新时代城市公共社会福利设施规划标准研究——走向全龄友好社会

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城市规划 2024年第2期48卷 75-83页

作者：王佳文胡继元王建龙王思源牟毫清华大学建筑学院中规院(北京)规划设计有限公司中国城市规划设计研究院雄安研究院

国家“十四五”规划及2035远景目标纲要提出“增进民生福祉、提升共建共治共享水平”,对我国社会福利设施体系提出了新目标。既有的城市公共社会福利设施体系、设施功能、规划标准等已经无法满足新时代的社会发展需求。基于我国社会福... 详细信息

国家“十四五”规划及2035远景目标纲要提出“增进民生福祉、提升共建共治共享水平”,对我国社会福利设施体系提出了新目标。既有的城市公共社会福利设施体系、设施功能、规划标准等已经无法满足新时代的社会发展需求。基于我国社会福利事业的发展情况,以面向老年人、儿童和残疾人的城市公共社会福利设施为重点研究对象,系统梳理了既有设施体系及存在的主要问题,根据相关设施规划标准在实践中的应用反馈,对新时代国家层面城市公共社会福利设施规划标准的修订提出了总体思路,并从体系完善、级配方式、指标修订、选址要求等方面提出了建议。

关键词：城市公共社会福利设施规划标准老年人儿童残疾人

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基于机器学习的钻井液流变参数智能识别方法

煤田地质与勘探 2024年第5期52卷 183-192页

作者：刘长晔杨现禹蔡记华王韧王建龙代凡斐郭万阳蒋国盛冯洋中国地质大学(武汉)工程学院湖北武汉430074 中国石油集团工程技术研究院有限公司北京102206

钻井液流变性是钻井液流动和变形的特性,对于携带与悬浮岩屑、提高钻进速度至关重要,准确掌握钻井液流变参数是保证井眼清洁与高效钻进的前提。提出一种基于卷积神经网络(Convolu-tionalNeuralNetwork,CNN)的钻井液流变参数智能识别方法... 详细信息

钻井液流变性是钻井液流动和变形的特性,对于携带与悬浮岩屑、提高钻进速度至关重要,准确掌握钻井液流变参数是保证井眼清洁与高效钻进的前提。提出一种基于卷积神经网络(Convolu-tionalNeuralNetwork,CNN)的钻井液流变参数智能识别方法,通过磁力搅拌产生稳定的钻井液流动图像,利用多种数据增强方法增加图像数量并建立数据库,增强模型的鲁棒性和泛化能力。优化AlexNet卷积神经网络算法,构建钻井液流变参数识别模型。将数据库划分为训练集:验证集:测试集=7:2:1,对训练集进行迭代训练并通过验证集调整参数获得最佳拟合模型。此外,运用混淆矩阵、卷积核可视化技术和类激活技术(Gradient-weighted Class Activation Mapping,Grad-CAM)对模型进行多方位评估。结果表明:(1)钻井液流变参数识别模型对钻井液塑性黏度测试的宏精确率为95.2%,宏召回率为94.7%,宏F1值为0.95。(2)对钻井液表观黏度测试的宏精确率为91.6%,宏召回率为91.5%,宏F1值为0.90。(3)利用卷积核可视化技术和Grad-CAM对特征提取进行可视化处理,发现钻井液波纹形状和大小会影响模型流变参数识别准确度。(4)室内测试结果表明,该模型的测试误差为±2 mPa·s,在设计允许范围以内,具有较高的识别精确度和稳定性。所提出的钻井液流变参数实时智能识别方法可为安全、快速和准确地进行钻井液流变性测试提供智能化技术思路。

关键词：钻井液流变参数机器学习卷积神经网络智能识别

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火花源原子发射光谱法测定钒钛生铁中微量元素的研究

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山西冶金 2024年第4期47卷 44-46页

作者：杨伟飞王建龙酒泉钢铁(集团)有限责任公司甘肃嘉峪关735100

为了及时、准确地测定钒钛生铁中微量元素的含量,采用火花源原子发射光谱法,分析钒钛生铁中的Si、Mn、P、S、V、Ti、Ni和Cr等微量元素。通过优化分析仪器条件,进行仪器的精密度、正确性实验,实现了直读光谱仪快速检测钒钛生铁中的微量... 详细信息

为了及时、准确地测定钒钛生铁中微量元素的含量,采用火花源原子发射光谱法,分析钒钛生铁中的Si、Mn、P、S、V、Ti、Ni和Cr等微量元素。通过优化分析仪器条件,进行仪器的精密度、正确性实验,实现了直读光谱仪快速检测钒钛生铁中的微量元素。

关键词：原子发射光谱法钒钛生铁控制样品精密度正确度

输尿管软镜碎石术对80岁及以上上尿路结石患者的疗效及安全性评估

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中华医学杂志 2024年第24期104卷 2229-2233页

作者：汤润华王浩然宋琉琪刘建勇逄城王建龙国家老年医学中心中国医学科学院老年医学研究院北京医院泌尿外科北京中国医学科学院北京协和医学院研究生院北京

目的探讨输尿管软镜碎石术(FURL)对≥80岁上尿路结石患者的疗效及安全性评估。方法回顾性分析北京医院2019年1月至2023年9月因单侧上尿路结石行FURL治疗的297例老年患者临床资料, 将患者分为高龄组(≥80岁)与中低龄组(60岁≤年龄0.05)... 详细信息

目的探讨输尿管软镜碎石术(FURL)对≥80岁上尿路结石患者的疗效及安全性评估。方法回顾性分析北京医院2019年1月至2023年9月因单侧上尿路结石行FURL治疗的297例老年患者临床资料, 将患者分为高龄组(≥80岁)与中低龄组(60岁≤年龄0.05)。结论 FURL治疗≥80岁上尿路结石患者的SFR、手术时间、术后并发症发生率与中低龄老年患者相当, 具有较好的安全性和有效性。

关键词：输尿管镜老年尿路结石手术后并发症回顾性队列研究