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Four kinds of capping materials for controlling phosphorus and nitrogen release from contaminated sediment using a static simulation experiment

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 25-33页

作者： Zhenming Zhou Canyang lin shuwen li Shupo liu Fei li Baoling Yuan College of Civil Engineering Huaqiao UniversityXiamen 361021China

We determined the effects of quartz sand(QS),water treatment plant sludge(WTPS),aluminum-based P-inactivation agent(Al-PIA),and lanthanum-modified bentonite(LMB)thin-layer capping on controlling phosphorus and nitrogen release from the sediment,using a static simulation experiment.The sediment in the experiment was sampled from Yundang Lagoon(Xiamen,Fujian Province,China),which is a eutrophic waterbody.The total phosphorus(TP),ammonium nitrogen(NH4+-N),and total organic carbon(TOC)levels in the overlying water were measured at regular intervals,and the changes of different P forms in WTPS,Al-PIA,and sediment of each system were analyzed before and after the test.The average TP reduction rates of LMB,Al-PIA,WTPS,and QS were 94.82,92.14,86.88,and 10.68%,respectively,when the release strength of sediment TP was 2.26–9.19 mg/(m^(2)·d)and the capping strength of the materials was 2 kg/m^(2).Thin-layer capping of LMB,WTPS,and Al-PIA could effectively control P release from the sediment(P0.05).Based on our results,LMB,Al-PIA,and WTPS thin-layer capping promoted the migration and transformation of easily released P in sediment.The P adsorbed by WTPS and Al-PIA mainly occurred in the form of NAIP.

关键词： Sediment Eutrophication Thin-layer capping Phosphorus Nitrogen Aluminum-based P-inactivation agent

Enhancement of visible-light-driven oxidative amine coupling under aerobic and anaerobic conditions by photocatalyst with spatial separation of photoinduced charge carriers

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Nano Research 2023年第4期16卷 4715-4722页

作者： Shasha Wang Kuan Gao Yang Cui shuwen li Heyao Zhang Bin Zhang Jie Wu Hongwei Hou Shuangquan Zang Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Science Xuchang UniversityXuchang 461000China

Spatial separation of oxidation/reduction cocatalyst is an effective means to improve the efficiency of charge separation in photocatalytic reaction systems.Herein,a yolk-shell Pd@NH_(2)-UiO-66@Cu_(2)O heterojunction was designed and synthesized by integration of electron collector Pd and hole collector Cu_(2)O inside and outside of a photoactive metal-organic framework(MOF)NH_(2)-UiO-66,respectively.The obtained Pd@NH_(2)-UiO-66@Cu_(2)O heterojunction effectively inhibits the electron and hole recombination through the photo-induced electrons and holes flow inward and outward of the composite,and promotes the reduction and oxidation abilities for the oxidative coupling of benzylamine to imines.Compared with Pd/NH_(2)-UiO-66@Cu_(2)O,Pd@NH_(2)-UiO-66,and Pd/NH_(2)-UiO-66,Pd@NH_(2)-UiO-66@Cu_(2)O exhibits the highest photocatalytic activity.More importantly,Pd@NH_(2)-UiO-66@Cu_(2)O shows a conversion rate of benzylamine up to 99%either by oxidation under aerobic conditions or by strong adsorption of H atom(Hads)under anaerobic conditions.In addition,the catalyst shows good stability and can be recycled at least ten times.This work provides useful guidance on construction of MOFs-based composites with spatially separated photoinduced charge carriers to realize efficient oxidation coupling of benzylamine in both aerobic and anaerobic conditions.

关键词： metal-organic frameworks palladium nanoparticle photocatalysis cuprous oxide oxidative coupling of amines

Ta含量对ZrTiNbAl系合金钝化膜形成机制和耐腐蚀性的影响

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材料工程 2024年第3期52卷 117-128页

作者：李淑雯张洋马亚玺戴鹏飞张中武哈尔滨工程大学材料科学与化学工程学院超轻材料与表面技术教育部重点实验室哈尔滨150001

采用动电位极化、电化学阻抗技术、Mott-Schottky分析和恒电位极化研究(40-x)Zr-30Ti-20Nb-10Al-x Ta(x=0,2,4,原子分数/%,下同,简称Tax合金)高熵合金在0.3 mol/L liOH溶液中的钝化膜形成机制和耐腐蚀性。结果表明:Ta的适量(2%)加入可... 详细信息

采用动电位极化、电化学阻抗技术、Mott-Schottky分析和恒电位极化研究(40-x)Zr-30Ti-20Nb-10Al-x Ta(x=0,2,4,原子分数/%,下同,简称Tax合金)高熵合金在0.3 mol/L liOH溶液中的钝化膜形成机制和耐腐蚀性。结果表明:Ta的适量(2%)加入可形成致密氧化膜从而提高合金体系的耐腐蚀性,Ta的过量添加(4%)造成氧空位浓度升高,耐腐蚀性下降。Ta_(2)合金的腐蚀电流密度为49.66 nA/cm^(2),小于Ta0,Ta4合金的腐蚀电流密度(201.40,70.16 nA/cm^(2))。Ta_(2)合金钝化膜内的氧空位点缺陷浓度为9.79×10^(18)cm^(-3),小于Ta0,Ta4合金的氧空位点缺陷浓度(2.13×10^(19),2.05×10^(19)cm^(-3)),具有最致密的钝化膜结构。合金的钝化膜是由ZrO_(2),Nb_(2)O_(5),TiO_(2),Al2O_(3),Ta_(2)O_(5)组成的稳定n型钝化膜。其中,Ta_(2)合金的氧化膜内ZrO_(2),Nb_(2)O_(5),TiO_(2)氧化物含量最高,延缓了原生氧化膜的溶解速度,保护基体不被继续溶解,具有最佳的耐腐蚀性。

关键词：高熵合金显微结构腐蚀钝化膜

Comparison of different land-surface perturbation methods in short-range ensemble forecasts

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Atmospheric and Oceanic Science Letters 2021年第3期14卷 60-65页

作者： Zhibo Gao Jiangshan Zhu Yan Guo Xiaodong Yan Xiujuan Wang Huoqing li shuwen li State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijingChina Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Jilin Province Technology Center for Meteorological Disaster Prevention ChangchunChina Institute of Desert Meteorology China Meteorological AdministrationUrumqiChina

为了比较不同陆面扰动方法对短时集合预报的影响,本研究设计了陆面模式扰动实验(LSMPE),初始土壤湿度扰动实验(ISMPE),陆面-大气耦合系数扰动实验(LCCPE)以及大气扰动对照实验(GEFSPE).结果表明,在三组陆面扰动实验中,LSMPE能代表最大... 详细信息

为了比较不同陆面扰动方法对短时集合预报的影响,本研究设计了陆面模式扰动实验(LSMPE),初始土壤湿度扰动实验(ISMPE),陆面-大气耦合系数扰动实验(LCCPE)以及大气扰动对照实验(GEFSPE).结果表明,在三组陆面扰动实验中,LSMPE能代表最大的不确定性且误差最小;ISMPE的离散度要比LCCPE稍大,但是耦合系数的减弱能有效降低区域平均降水量.然而,所有陆面扰动实验产生的离散度均小于GEFSPE,这表明未来有必要将陆面扰动与大气扰动相结合,以使得模式能代表更多的不确定性.

关键词：短时集合预报陆面参数华南地区

Interrelation among alexithymia and negative psychology of nursing personnel and their coping style

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Family Medicine and Community Health 2014年第2期2卷 1-5页

作者： shuwen li Guiying Yao Yanling Gui Bin Zhang School of Nursing Xinxiang Medical UniversityXinxiang CityHenan Province 453003China The First Affiliated Hospital of Xinxiang Medical University Xinxiang CityHenan Province 453003China

Objective:The purpose of the current study was to discuss the interrelation among alexithy-mia and negative psychology of nursing personnel and their coping style,so as to provide a theoret-ical basis for better mental health education and psychological intervention for nursing personnel.Methods:A questionnaire survey was administered to 503 nursing personnel sampled from a hospital in Henan Province between May and June 2010 by means of survey instruments of the Toronto Alexithymia Scale-20 Items(TAS-20),the Trait Coping Style Questionnaire(TCSQ),and the General Health Questionnaire(GHQ-20).Results:(1)Alexithymia and a negative coping style had a positive correlation with negative psychology(P<0.01),while a positive coping style had a negative correlation with negative psy-chology(P<0.01).(2)The model fitting indices of coping style as intermediate variables between alexithymia and negative psychology were χ^(2)/df=1.459,RMSEA=0.030,CFI=0.995,IFI=0.995,RFI=0.966,TCI=0.989,and NEI=0.985,indicating a good model fitting.Ninety-nine percent of the total variation of negative psychology could be explained by alexithymia and coping style,of which the indirect effect affecting negative psychology by coping style accounted for 94.59%of the total.Conclusion:Alexithymia and coping style were very important factors for improvement of current mental status of the nursing personnel,especially for a change in negative coping style and selection of good coping style.

关键词： Nursing personnel Physical and mental health Psychological intervention Alexithymia Negative emotion Coping strategy

Biologically inspired silk fibroin grafted polyacrylonitrile filtration membrane prepared in ZnCl_2 aqueous solution

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Chinese Chemical Letters 2019年第1期30卷 239-242页

作者： Jingang li shuwen li Xiaohui Wang Fan Fan Kongyin Zhao Junfu Wei linhua Zhang Dunwan Zhu State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Polytechnic University Tianjin Key Laboratory of Biomedical Materials Institute of Biomedical Engineering Chinese Academy of Medical Sciences & Peking Union Medical College

In this study, biologically inspired silk fibroin grafted polyacrylonitrile(SF-g-PAN) filtration membrane was prepared using ZnCl_2 aqueous solution as solvent, avoiding the use of organic solvents. Phase inversion occurred when Zn^(2+)and Cl-ions gradually diffused into water, creating a well-connected ion channel network and the SF-g-PAN filtration membrane was obtained. The membranes were observed by SEM and 3D ultra-depth microscope. The hydrophilic property, pore size distribution and dye rejection of the membrane were investigated. Results showed that the membrane has no finger hole formation because ZnCl_2 aqueous solution has a lower curing rate parameter compared with organic solvents. SF-gPAN membrane possessed good anti-fouling properties and pH sensitivity. The pore size distribution of the SF-g-PAN membrane was 0.25–1.04 nm. The rejection of direct yellow 27(Mw = 662.6) and amaranth(Mw = 604.5) was 96.51% and 30.63%, with the flux of 72.32 L m^(-2) h^(-1) and 73.83 L m^(-2) h^(-1) respectively at0.1 MPa. The SF-g-PAN membrane has a wide range of applications prospect in fine separation, dye desalination, waste water treatment and biomedical fields.

关键词： Biologically inspired membrane Silk grafted polyacrylonitrile ZnCl2 aqueous solution Narrow pore size distribution pH-Sensitivity Anti-fouling

从定位双星到布局寰宇:专精特新企业如何借助关键核心技术突破实现价值共创

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南开管理评论 2024年第3期27卷 94-105,I0017,I0018页

作者：李树文罗瑾琏张志菲大连理工大学经济管理学院同济大学经济与管理学院

专精特新企业是突破关键核心技术的典型组织,在我国面临的独特关键核心技术情境下,如何利用其突破的关键核心技术实现价值共创,成为当前理论研究与管理实践共同面临的挑战。本文选取司南导航这一专精特新“小巨人”企业为调研对象,运用... 详细信息

专精特新企业是突破关键核心技术的典型组织,在我国面临的独特关键核心技术情境下,如何利用其突破的关键核心技术实现价值共创,成为当前理论研究与管理实践共同面临的挑战。本文选取司南导航这一专精特新“小巨人”企业为调研对象,运用探索性案例分析方法系统探究关键核心技术突破对价值共创的助推过程。研究发现:(1)关键核心技术突破通过触发企业确立组织身份与编排技术资源来助推企业打破资源约束、优势选择与链条边界,实现价值共创。(2)随着关键核心技术从单项突破到集成设计,阶段性组织身份依次确立,并催动着技术资源编排表现出“结构化—能力化—杠杆化”的资源变化逻辑,即从资源建构到资源外拓的能力化提升、再到资源联动的杠杆化撬动,资源编排中的企业作用也发生着从参与到参与与主导并存、再到主导的显著变化。(3)随着情境更迭,我国企业实现从单项突破到全链突破的“由上而下”技术释放,以及到集成设计的“由下而上”技术集成。本文不仅解构了关键核心技术突破助推价值共创的过程机制,而且建构了我国独特情境下关键核心技术突破后产业化应用的理论框架,补充和丰富了关键核心技术理论体系。

关键词：关键核心技术突破价值共创资源编排组织身份专精特新企业

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高分十四号高光谱影像浅海水深反演应用

海洋测绘 2024年第2期44卷 56-59,65页

作者：周欣刘文涛郑柯李树文智慧地球重点实验室北京100094

当前星载高光谱水深遥感反演应用以国外卫星数据为主,国产卫星数据的研究和应用较少,为挖掘国产高分辨率卫星高光谱影像浅海水深反演潜力,利用高分十四号卫星影像,以我国三亚湾西岛为实验区域,结合实测水深点和ICESat-2激光雷达数据,建... 详细信息

当前星载高光谱水深遥感反演应用以国外卫星数据为主,国产卫星数据的研究和应用较少,为挖掘国产高分辨率卫星高光谱影像浅海水深反演潜力,利用高分十四号卫星影像,以我国三亚湾西岛为实验区域,结合实测水深点和ICESat-2激光雷达数据,建立双波段比值水深反演模型,进行高光谱影像的水深反演能力研究。实验结果表明:高分十四号高光谱影像具有较好的浅水水深反演能力和反演精度,实验成果将为国产卫星开展星载高光谱数据水深反演研究提供思路和借鉴。

关键词：高光谱影像水深反演精度评估高分十四号双波段比值

基于计算机断层扫描影像术前预测肝细胞癌微血管侵犯的研究进展

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中国医学前沿杂志（电子版） 2024年第3期16卷 77-82页

作者：王粟张雷李淑文寇文豪杨世忠青海大学附属医院肝胆胰外科青海西宁810000 清华大学附属北京清华长庚医院超声科北京102218 清华大学附属北京清华长庚医院肝胆胰中心、清华大学精准医学研究院清华大学临床医学院北京102218

微血管侵犯(microvascular invasion,MVI)是肝细胞癌患者根治术后近期复发和转移的重要危险因素,诊断MVI的金标准是术后病理学检查。建立术前无创评估MVI的方法,可以指导肝细胞癌患者术前治疗决策和确定手术方式,从而改善患者生存。本... 详细信息

微血管侵犯(microvascular invasion,MVI)是肝细胞癌患者根治术后近期复发和转移的重要危险因素,诊断MVI的金标准是术后病理学检查。建立术前无创评估MVI的方法,可以指导肝细胞癌患者术前治疗决策和确定手术方式,从而改善患者生存。本文针对术前计算机断层扫描影像预测肝细胞癌MVI的研究进展进行梳理,以期对肝细胞癌的临床治疗决策提供帮助。

关键词：肝细胞癌微血管侵犯影像学复发转移