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Frontiers of Environmental Science & Engineering 2012年第4期6卷 493-497页

作者： Xiangliang PAN Jing LIU Wenjuan SONG daoyong ZHANG State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China

Biosorption of extracellular polymeric substances （EPS） from Synechocystis sp. （cyanobacterium） with Cu（II） was investigated using fluorescence spectroscopy. Three fluorescence peaks were found in the excitation-emission matrix （EEM） fluorescence spectra of EPS. Fluorescence of peak A （Ex/Em = 275/452 nm） and peak C （Ex/Em= 350/452nm） were originated from humic-like substances and fluorescence of peak B （Ex/ Em= 275/338nm） was attributed to protein-like sub- stances. Fluorescence of peaks A, B, and C could be quenched by Cu（II）. The effective quenching constants （lg Ka） were 2.8-5.84 for peak A, 6.4-9.24 for peak B, and 3.48-6.68 for peak C, respectively. The values of lg Ka showed a decreasing trend with increasing temperature, indicating that the quenching processes were static in nature. The binding constants （lg Kb） followed the order of peak A 〉 peak B 〉 peak C, implying that the humic-like substances in EPS have greater Cu（II） binding capacity than the protein-like substances. The binding site number, n, in EPS-Cu（II） complexes for peaks A, B, and C was less than 1. This suggests the negative cooperativity between multiple binding sites and the presence of more than one Cu binding site.

关键词： biosorption conditional binding constant extracellular polymeric substances (EPS) fluorescence quenching

Machine-learning-assisted discovery of empirical rule for inherent brittleness of full Heusler alloys

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Journal of Materials Science & Technology 2022年第36期131卷 1-13页

作者： Hao-Xuan Liu Hai-Le Yan Nan Jia Shuai Tang daoyong Cong Bo yang Zongbin Li Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China State Key Lab of Rolling and Automation Northeastern UniversityShenyang 110819China Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux(LEM3) CNRS UMR 7239Universitéde LorraineMetz 57045France

Brittleness is a critical issue hindering the potential application of the X_2YZ-type full Heusler alloys in several fields of state-of-the-art *** realize optimization of brittleness or design a ductile Heuser alloy,it is greatly urgent to identify the key materials factors deciding brittleness and establish an empirical rule to effectively evaluate *** this purpose,by using a machine learning and human analysis cooperation approach,the brittleness of the X_2YZ-type Heusler alloys was systematically *** showed that the ductility is majorly decided by 6 key materials factors in the studied *** these 6 factors,a machine learning model to predict the Pugh's ratio k was *** analyses showed that the crystal structure of the X component could be the most critical factor deciding the *** X component has the face-centered cubic(FCC)structure for most of the alloys with superior *** effectively estimate ductility and guide materials design,an empirical formula of k=mEWF_(m+n)G_(m)+k_(0)was established based on the known information of electron work function(EWF)and shear modulus(G)of the X,Y,and Z elements where the subscript m represents the weight-average *** coefficients of m(negative)and n(positive)were confirmed to have opposite signs,which can be explained based on the relations between the ductility and the deformation/fracture *** work is expected to deepen the understanding in ductility and promote the design of advanced ductile Heusler alloys.

关键词： Heusler alloy Machine learning Ductility Empirical formula Pugh's ratio k

洞庭湖典型多元结构地层垸堤减压井渗控效果研究

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水利水电快报 2024年第8期45卷 65-71,95页

作者：王导勇崔皓东唐尧范越湖南省水利水电勘测设计规划研究总院有限公司湖南长沙410002 长江科学院水利部岩土力学与工程重点实验室湖北武汉430010

针对减压井技术在洞庭湖区尤其是多元结构地层中适用性的研究较为匮乏的问题,以洞庭湖重点垸堤防加固工程为背景,对长春垸二元结构及多元结构堤基的堤防渗流安全开展模拟分析,系统评价防渗墙与减压井在不同地层结构形式下的堤防渗流安全... 详细信息

针对减压井技术在洞庭湖区尤其是多元结构地层中适用性的研究较为匮乏的问题,以洞庭湖重点垸堤防加固工程为背景,对长春垸二元结构及多元结构堤基的堤防渗流安全开展模拟分析,系统评价防渗墙与减压井在不同地层结构形式下的堤防渗流安全,对比研究减压井在不同结构地层中应用效果的差异,验证减压井对于湖区多元结构地层的适配能力。结果表明:在洞庭湖区二元结构地层应用减压井时,单井排水量较大,减压效果显著;多元结构地层中效果虽不及在二元结构地层中显著,但仍能有效消减堤内承压水,保障堤防渗流安全。研究成果可为洞庭湖重点垸堤防加固工程的渗控设计提供参考。

关键词：洞庭湖区堤防减压井二元结构地层多元结构地层

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泰国E区块钻井液技术

复杂油气藏 2024年第1期17卷 98-102页

作者：杜道勇李帆韩玉泉陈军中石化华东石油工程有限公司江苏钻井公司江苏扬州225001

泰国E区块地层上部井段存在大段泥页岩,易造浆和发生垮塌;目的层属火成岩裂缝型油气藏,施工安全密度窗口窄,易发生喷漏同层复杂。针对该情况,开展了硫酸钾胺基钻井液配方室内研究,结果表明,硫酸钾和有机胺TJX-1配伍后抑制性明显提高,页... 详细信息

泰国E区块地层上部井段存在大段泥页岩,易造浆和发生垮塌;目的层属火成岩裂缝型油气藏,施工安全密度窗口窄,易发生喷漏同层复杂。针对该情况,开展了硫酸钾胺基钻井液配方室内研究,结果表明,硫酸钾和有机胺TJX-1配伍后抑制性明显提高,页岩膨胀率降低72.1%,滚动回收率达到92.9%;优化配方后的钻井液体系流变性能稳定,加入成膜封堵剂LXJ-1能够显著提高钻井液封堵性能。结合现场施工难点制定了配套技术方案,并在WBEXT-3D等多口井进行了成功应用,有效解决了松软泥页岩地层造浆和井壁垮塌问题,较有效地控制了目的层喷漏同层复杂,使同区块井机械钻速提高43.5%。

关键词：硫酸钾胺基钻井液抑制性封堵防塌喷漏同层

深度学习迭代重建算法优化儿童头颅CT图像噪声和图像纹理的可行性

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中国医学影像学杂志 2024年第2期32卷 193-198页

作者：田宏伟彭芸刘道永李昊岩刘勇洪天予孙记航首都医科大学附属北京儿童医院影像中心北京100045

目的评价深度学习迭代重建(DLIR)算法与常规自适应迭代重建(ASIR-V)算法对儿童头颅外伤CT图像噪声和图像纹理的优化程度及图像显示效果的差异。资料与方法回顾性选取2020年12月7—11日首都医科大学附属北京儿童医院影像中心80例儿童头颅... 详细信息

目的评价深度学习迭代重建(DLIR)算法与常规自适应迭代重建(ASIR-V)算法对儿童头颅外伤CT图像噪声和图像纹理的优化程度及图像显示效果的差异。资料与方法回顾性选取2020年12月7—11日首都医科大学附属北京儿童医院影像中心80例儿童头颅CT,扫描方案为低辐射剂量轴扫,电压120 kV,电流150~220 mA。将得到的原始数据重建为5 mm厚层与0.625 mm薄层的脑窗、骨窗图像,分别重建为50%ASIR-V、高权重DLIR图像(DL-H),共8组图像。应用4分制主观评价脑沟脑室、脑灰白质与颅骨显示情况,并统计各组图像的病变数量;客观评价测量基底节层面的灰质和白质的CT值和噪声值,并计算对比噪声比,同时在同层面测量模糊程度指数,比较两种图像重建方法的差异。结果相较于50%ASIR-V图像,2种层厚的DL-H均可以提升脑沟脑室、脑实质显示能力(W=5.5~22.2,P均<0.05),5 mm的50%ASIR-V与0.625 mm的DL-H图像脑沟脑室、脑实质显示能力差异无统计学意义(W=0.9、2.0,P=0.32、0.05)。骨质显示能力方面,所有图像均可以达到满分4.0分。5 mm的50%ASIR-V与DL-H图像均可以在80例患者中发现共35处病变,包括出血病变12处,颅内积气1处,骨折9处,头皮软组织肿胀13处。客观评分方面,DL-H图像噪声低于50%ASIR-V图像(t=21.4~35.7,P均<0.05),0.625 mm的DL-H与5 mm的50%ASIR-V图像噪声及对比噪声比差异无统计学意义(t=1.7~2.2,P均≥0.05)。模糊程度指数显示DL-H优于50%ASIR-V图像(t=6.1、10.0,P均<0.05),0.625 mm的DL-H与5 mm的50%ASIR-V模糊程度指数差异无统计学意义(t=2.6,P=0.28)。结论DLIR可以降低图像噪声,改善图像纹理,整体提升儿童头颅外伤CT图像质量,0.625 mm的DL-H图像质量接近5 mm的50%ASIR-V图像,可以达到诊断要求,使进一步降低儿童头颅外伤的辐射剂量成为可能。

关键词：体层摄影术,X线计算机头颅儿童低剂量深度学习

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Seasonal variations and characteristics differences in the fluorescent components of extracellular polymeric substances from mixed biofilms in saline lake

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Science Bulletin 2017年第11期62卷 764-766页

作者： Mashura Shammi Xiangliang Pan Khan M.G. Mostofa daoyong Zhang Cong-Qiang Liu Laboratory af Bioremediation Department of Environmental Pollution and Process Control Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Department of Environmental Sciences Jahangirnagar University Dhaka 1342 Bangladesh Institute of Surface-Earth System Science Tianjin University Tianjin 300072 China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China University of Chinese Academy of Sciences Beijing 100049 China

Cyanobacteria are the Earth’s oldest oxygenic photoautotrophs and have had major impacts on shaping the *** long evolutionary history($3.5 bya)has enabled them to adapt to geochemical and climatic changes and,more recently,anthropogenic modifications of aquatic environments,including nutrient overenrichment(eutrophication),water diversion,withdrawal。

关键词：胞外聚合物季节变化生物膜特征组分荧光混合盐湖

集束可控高喷防渗墙技术在洞庭湖区堤防加固应用试验研究

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江西水利科技 2024年第4期50卷 262-267页

作者：王导勇谢为江郑建平刘达湖南省水利水电勘测设计规划研究总院有限公司湖南长沙410007 江西省水利科学院江西南昌330029 江西中恒地下空间科技有限公司江西南昌330000

集束可控高喷防渗墙施工技术与传统高喷工艺相比,其地层适应能力更强,成墙质量更可靠,与其他工艺相比,其在砂卵石地层且堤顶宽度狭窄时有明显优势。为了更好地解决洞庭湖区深厚砂卵石层和堤顶施工场地受限等问题,拟引入江西省水利科学... 详细信息

集束可控高喷防渗墙施工技术与传统高喷工艺相比,其地层适应能力更强,成墙质量更可靠,与其他工艺相比,其在砂卵石地层且堤顶宽度狭窄时有明显优势。为了更好地解决洞庭湖区深厚砂卵石层和堤顶施工场地受限等问题,拟引入江西省水利科学院研发的该项新技术。本次试验研究旨在进一步验证集束可控高喷防渗墙技术在洞庭湖区的适应性,通过试验获取关键技术参数,为后续大面积应用提供技术依据。试验研究表明:与其他传统工艺分析对比,该工艺所建造的防渗墙不存在开叉、漏喷、沉渣、断墙等质量缺陷,质量保证度高,施工作业面占用宽度相对较小,适应能力强,工效快,成本低,弃浆弃渣排放少,无塌槽塌孔风险,技术工艺优势明显,可在洞庭湖区推广使用。

关键词：防渗墙高喷长螺旋集束可控

Status-quo of proved oil/gas initially-in-place in China as of 2020 and its variation trend in the past decade

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Energy Geoscience 2022年第4期3卷 343-348页

作者： Liming Zhou daoyong Zhang Jinchao Sun Yufeng Gu Chenshuo Zhang Chen Zhang Strategic Research Center of Oil/gas Resources Ministry of Natural ResourcesBeijing100034China CHN Energy Lucency Enviro-Tech CO. LTDBeijing100039China

This study analyzes the status-quo of the proved oil/gas initially-in-place and its variation trend,the proved undeveloped oil/gas initially-in-place,and the remaining proved technically recoverable reserves(TRR)of oil/gas in China as of 2020 based on *** shown by the results,the proved oil initially-in-place(OIIP),the proved undeveloped OIIP,and the remaining proved TRR of oil in China are mainly distributed in the Bohai Bay,Ordos and Songliao Basins,and those of free gas are mainly in the Ordos,Sichuan,and Tarim *** 2011 to 2020,the largest increment in the proved OIIP,the proved undeveloped OIIP and the remaining proved TRR of oil occurred in the Ordos Basin,followed by the Bohai Bay Basin,while that in the proved gas initially-in-place(GIIP),the proved undeveloped GIIP,and the remaining proved TRR of gas occurred in the Ordos Basin,followed by the Sichuan *** addition,a comprehensive analysis reveals that the petroliferous basins in China with the potential of reserve addition and production growth include the Ordos Basin,the Bohai Bay Basin,the Sichuan Basin,and the Tarim Basin.

关键词： Proved oil/gas initially-in-place(OIIP/GIIP) Proved undeveloped oil/gas initially-in-place(OIIP/GIIP) Remaining proved technically recoverable reserves(TRR) Petroleum distribution in Chinese basins Variation trend

整脊手法推拿联合穴位深刺、八段锦治疗神经根型颈椎病的效果

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中外医学研究 2024年第3期22卷 33-36页

作者：邹道涌陈镜锋殷琴张涛龙岩市中医院福建龙岩364000

目的:探讨整脊手法推拿联合穴位深刺、八段锦治疗神经根型颈椎病(cervical spondylotic radiculopathy,CSR)的效果。方法:选取2021年2月—2022年10月龙岩市中医院收治的90例CSR患者作为研究对象。根据随机数表法将其分成观察组与对照组,... 详细信息

目的:探讨整脊手法推拿联合穴位深刺、八段锦治疗神经根型颈椎病(cervical spondylotic radiculopathy,CSR)的效果。方法:选取2021年2月—2022年10月龙岩市中医院收治的90例CSR患者作为研究对象。根据随机数表法将其分成观察组与对照组,各45例。两组均给予综合治疗,对照组给予八段锦,观察组在对照组基础上给予整脊手法推拿联合穴位深刺。比较两组临床疗效,治疗前后中医症候积分、血液流变学指标。结果:治疗8周,两组颈肩疼痛、四肢萎软、肢体麻木、眩晕评分均降低,观察组颈肩疼痛、四肢萎软、肢体麻木、眩晕评分均低于对照组,差异有统计学意义(P<0.05)。观察组总有效率高于对照组,差异有统计学意义(P<0.05)。治疗8周,两组全血高切黏度、血浆黏度、全血低切黏度降低,观察组全血高切黏度、血浆黏度、全血低切黏度均低于对照组,差异有统计学意义(P<0.05)。结论:整脊手法推拿联合穴位深刺、八段锦治疗CSR效果满意,可改善中医症候积分及血液流变学。

关键词：神经根型颈椎病整脊手法推拿穴位深刺八段锦血液流变学

Discussion on the Planning of a Remaining Market in the New Urban Area under the Background of Urbanization: A case study of Xin’an Grand Market of Qingdao

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Journal of Landscape Research 2023年第6期15卷 27-30页

作者： LIU Zihan LI daoyong yang Peizhe North China University of Technology Beijing 100144China

Chinese markets play an important social role in the long history and are important places for currency circulation,human communication and cultural ***,with the acceleration of urbanization,market civilization has gradually *** this study,the current situation of a remaining market in Qingdao Development Zone was surveyed,and the problems of the market were ***,the reasons for the formation and survival of the market were analyzed,and some strategies to transform the market were put forward to find a way out for the development of the same type of markets in China.

关键词： Urbanization Market A new city Xin’an