检索结果-南通市图书馆

Journal of Energy Chemistry 2025年第1期100卷 39-49页

作者： Hongqiang yang Jianfeng Zheng Guoyu Wang Yifei Gao Yatao yang Jia Li Xiaojin Han Yan Cui Zhanggen Huang National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal Institute of Coal Chemistry Chinese Academy of Science University of Chinese Academy of Science Shenyang University of Chemical Technology

Photoelectrocatalytic coupling CO2and volatile organic compounds （VOCs） is a promising green strategy for the synergistic conversion of the two carbon-containing resources to *** catalytic efficiency is always at the mercy of chemical inertness of CO2and the competitive hydrogen evolution of ***,a modified g-C3N4/ZnAl-LDH Z-scheme heterojunction catalyst with dual reaction site was rationally designed and precisely *** Faraday efficiency of ethanol reached 68.67%with a corresponding formation rate of 227.3μmol *** revealed by in-situ characterizations and density functional theory calculations,CO2and HCHO were absorbed at Zn site and N site,***,*CO generated from CO2and HCHO was converted to*CH3O and*CHO on the dual-active-site *** detailed reaction mechanism experiments indicated that C–C coupling only occurred between*CO and*CH3O in electrocatalysis *** from the“*CO+*CH3O”path,another“*CO+*CHO”coupling path was also detected in photoelectrocatalytic *** selectivity of ethanol was significantly enhanced due to the synthesis of dual-site catalyst and the dual-path coupling path between CO2and HCHO simultaneously driven by light and electricity.

关键词： Photoelectrocatalysis Z-scheme C–C coupling Ethanol

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

“嫦娥三号”降落区溅射物空间分布关系

遥感信息 2020年第4期35卷 141-147页

作者：赵桉铭胡腾桑洋陈嘉伟康志忠中国地质大学(北京)土地科学技术学院北京100083 教育部深空探测联合研究中心月球与行星探测国际合作研究分中心北京100083

针对“嫦娥三号”着陆区溅射物与撞击坑间缺乏多尺度耦合关系解译的问题,提出了基于大小、频率和方向的空间分布关系量化表达方法。以“嫦娥三号”降落相机影像为基础,采用人工识别的方式,提取出直径大于0.1 m的撞击坑2564个,以及尺寸大... 详细信息

针对“嫦娥三号”着陆区溅射物与撞击坑间缺乏多尺度耦合关系解译的问题,提出了基于大小、频率和方向的空间分布关系量化表达方法。以“嫦娥三号”降落相机影像为基础,采用人工识别的方式,提取出直径大于0.1 m的撞击坑2564个,以及尺寸大于0.1 m的石块2363个。划分不同直径石块和撞击坑所在区域避免分辨率不均的影响,并通过方位角分区研究溅射物与方向的关系。结果表明,石块、撞击坑的数量随直径的增大而减小;“紫微”撞击坑的溅射是有方向性的;着陆点恰好位于2个溅射区之间,着陆区域主要分布直径0.5 m以下的石块和撞击坑,相比于着陆区周边,该区的地形较为平坦。

关键词：嫦娥三号降落区石块撞击坑溅射物

Castleman病的影像学诊断与鉴别诊断

在线全文

学校读者我要写书评

暂无评论

现代医用影像学 2016年第6期25卷 1018-1021页

作者：杨亮桑节峰连云港市赣榆区中医医院影像科连云港市赣榆区人民医院影像科 222002

目的:回顾分析经本院经临床病理证实的Castleman病例,分析其临床及影像学特征以提高其临床诊断的准确率。材料与方法:搜集2010年1月至2015年12月间我院经手术病理证实的4例巨大淋巴结增生(CD)病例,所有病例均经多排螺旋CT平扫并增强扫... 详细信息

目的:回顾分析经本院经临床病理证实的Castleman病例,分析其临床及影像学特征以提高其临床诊断的准确率。材料与方法:搜集2010年1月至2015年12月间我院经手术病理证实的4例巨大淋巴结增生(CD)病例,所有病例均经多排螺旋CT平扫并增强扫描检查,部分病例行MRI检查。所有病例的CT图像均将其原始薄层图像输入ADW图像后处理工作站,进行MPR、VR、CPR、CTA等图像后处理进行观察,分析其临床及影像学特征。结果:4例患者CT平扫多为孤立单发软组织结节或肿块,伴或不伴卫星结节。其中单发3例,多发1例,病灶边缘光滑,界限清晰,密度多较均匀,部分病灶可见小片或星芒状低密度区,有的病灶可见点状钙化,为肿瘤中心放射或蔟状钙化。1例多发患者主要为多组淋巴结肿大,密度多较均匀,有肝脾轻度肿大,和少量腹水等表现。CT增强扫描所见:所有病例动脉期病灶明显强化,门脉期及延迟扫描肿块实质部分明显强化,肿块较大的病灶中心可见星芒状或裂隙状低密度灶。结论:Castleman病影像学上典型的表现为沿淋巴链分布的单发或多发的肿块,边界清晰,病灶中心的钙化和病灶中心的星芒状低密度是诊断CD的重要特征。在淋巴链分布区的富血供病变,在CT及MRI增强扫描动脉期表现明显强化,延迟期持续强化,并有中心瘢痕和钙化特点的病变,应考虑到Castleman病的可能性。

关键词：巨大淋巴结增生计算机成像图像后处理技术

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong yang Haochen Shen Xiaoming Xiao Zhichao Li Qi Zhou Wei yang Bin Jiang Yongli Sun Luhong Zhang Zhenhua Yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

基于先验目标航向的吊放声纳应召搜潜建模与仿真研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

系统仿真学报 2009年第20期21卷 6630-6633页

作者：吴芳杨日杰桑春龙海军航空工程学院电子信息工程系山东264001

针对已知目标的大概航向,需在有限范围内确定目标存在区的情况下,建立了利用吊放声纳的扇形和弧形应召搜潜模型、潜艇运动模型、搜潜概率模型,仿真分析了潜艇初始航向、吊放声纳间距、搜索样式等因素对应召搜索概率的影响。结果表明,初... 详细信息

针对已知目标的大概航向,需在有限范围内确定目标存在区的情况下,建立了利用吊放声纳的扇形和弧形应召搜潜模型、潜艇运动模型、搜潜概率模型,仿真分析了潜艇初始航向、吊放声纳间距、搜索样式等因素对应召搜索概率的影响。结果表明,初始航向角度的变化对弧形和扇形的应召搜索概率影响较小;不同潜艇运动模型中,吊放声纳间距的变化对弧形和扇形的应召搜索概率影响较大。

关键词：吊放声纳潜艇搜索概率蒙特卡洛法

Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen yang Peng Gao Lezhi yang Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute for Innovation Hunan University Changsha Research Institute of Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectroscopy/electrochemical impedance spectroscopy （FTIR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectroscopy

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao Li yangfei Chen yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu Wu Qi Chen Jiaxin yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

老年女性骨质疏松性骨折患者骨代谢相关生化指标变化及分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

临床医学研究与实践 2023年第6期8卷 17-20页

作者：唐敏桑阳赵丹四川省骨科医院检验科四川成都610041

目的探讨老年女性骨质疏松性骨折患者的骨代谢相关生化指标变化情况,并分析血栓形成标志物与骨转换状态的相关性。方法根据是否合并骨折将672例老年女性骨质疏松患者分为非骨折组(212例,骨质疏松未合并骨折)和骨折组(460例,骨质疏松性... 详细信息

目的探讨老年女性骨质疏松性骨折患者的骨代谢相关生化指标变化情况,并分析血栓形成标志物与骨转换状态的相关性。方法根据是否合并骨折将672例老年女性骨质疏松患者分为非骨折组(212例,骨质疏松未合并骨折)和骨折组(460例,骨质疏松性病理骨折)。收集患者的临床资料和相关血液指标。将非骨折组与骨折组患者按照年龄不同进行分组。比较各组间各指标水平。分析骨折组患者D-二聚体(D-D)与其他骨代谢指标的相关性。比较非骨折组与骨折组年龄校正前、后D-D分布情况。采用单因素及多因素Logistic回归分析探讨影响骨折组年龄校正后D-D水平升高的因素。结果骨折组的白蛋白(ALB)、前白蛋白(PA)、钙(Ca)、磷(P)、25-羟基维生素D[25-(OH)D]水平低于非骨折组,碱性磷酸酶(ALP)、D-D、纤维蛋白降解产物(FDP)、总Ⅰ型胶原氨基端延长肽(TPⅠNP)水平高于非骨折组(P<0.05)。骨折组中,随着年龄增长,患者的ALB、PA、Ca水平降低而D-D、FDP升高(P<0.05)。Spearman相关性分析结果显示,骨折组中,D-D水平与ALB、PA、Ca、25-(OH)D水平呈负相关,与β胶原特殊序列(β-CROSSL)、ALP和TPⅠNP呈正相关(P<0.05)。年龄校正后,骨折组中D-D阴性率从37.39%增长至53.26%。多因素Logistic回归分析结果显示,ALB、PA降低和TPⅠNP升高对年龄校正后D-D阳性结果判断具有显著的独立预测作用(P<0.05)。结论老年女性骨质疏松性骨折患者骨代谢生化指标显著改变并与D-D水平相关,且ALB、TPⅠNP与年龄校正后D-D水平独立相关,提示积极监测骨转换状态、提高营养状态和维持稳定的抗骨质疏松治疗对老年女性骨质疏松性骨折并发血栓风险有一定的预防意义。

关键词：骨代谢生化指标老年女性骨质疏松性骨折年龄校正的D-二聚体

超声电导仪靶向透药联合胸腔内注入尿激酶治疗结核性包裹性胸膜炎的效果

在线全文

学校读者我要写书评

暂无评论

医学综述 2017年第3期23卷 591-593,597页

作者：韩莉桑杨刘云陕西省结核病防治院内三科西安710100

目的观察超声电导仪靶向透药联合胸腔内注入尿激酶治疗结核性包裹性胸膜炎的临床效果。方法选择2014年3月至2015年8月陕西省结核病防治院收治的70例结核性包裹性胸膜炎患者为研究对象,采用随机数字法将患者分为观察组和对照组,各35例。... 详细信息

目的观察超声电导仪靶向透药联合胸腔内注入尿激酶治疗结核性包裹性胸膜炎的临床效果。方法选择2014年3月至2015年8月陕西省结核病防治院收治的70例结核性包裹性胸膜炎患者为研究对象,采用随机数字法将患者分为观察组和对照组,各35例。两组患者均给予抽取胸腔积液、抗结核等常规治疗,对照组患者在此基础上胸腔注入尿激酶(20 mL 0.9%氯化钠注射液+10万U尿激酶),而观察组患者则在对照组基础上采用超声电导仪靶向透药。比较两组患者的临床疗效、胸腔积液引流总量、胸腔积液消失时间以及胸膜厚度;同时根据超声或胸部X线检查结果对两组患者的胸膜肥厚程度及胸膜粘连发生率进行比较。结果观察组患者的总有效率高于对照组[94.29%(33/35)比74.29%(26/35)](P<0.05)。观察组的胸腔积液引流总量明显大于对照组,而胸腔积液消失时间早于对照组、胸膜厚度明显小于对照组[(3 316.5±286.7)mL比(2 234.3±235.8)mL、(8.6±2.4)d比(14.9±4.6)d、(0.56±0.13)cm比(0.81±0.21)cm](P<0.05);两组患者胸膜肥厚程度比较差异有统计学意义(P<0.05);观察组患者胸膜粘连发生率为11.43%(4/35),低于对照组的31.43%(11/35)(P<0.05)。结论超声电导仪靶向透药联合胸腔内注入尿激酶治疗结核性包裹性胸膜炎的疗效优于单独胸腔内注入尿激酶,症状改善早,胸膜肥厚、胸膜粘连的发生率低,值得在临床上积极推广。

关键词：结核性包裹性胸膜炎超声电导仪靶向透药胸腔内注入尿激酶