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Nano Research 2024年第9期17卷 8250-8260页

作者： Yun han Di Lan mengjun han Zihao Xia Jiaxiao Zou Zirui Jia College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China

The rational design of composition nanostructures and morphologies of the carbon-based composites materials has a significant potential for tuning electromagnetic parameters and thereby improving their performance as electromagnetic wave(EMW)*** this work,the flower-like Cu/Co-NC/MoS_(2)(NC=N-doped carbon skeleton)composites were successfully prepared by employing CuCoZn-ZIF(ZIF=zeolitic imidazolate framework)as precursor with subsequent annealing and hydrothermal *** unique flower-like morphology and electromagnetic synergy strategy between components enable the as-obtained Cu/Co-NC/MoS_(2)composites to exhibit outstanding microwave absorption ***,the minimum reflection loss of Cu/Co-NC/MoS_(2)reaches-54.36 dB at 2.7 *** the thickness reduces to 2.2 mm,the maximum effective absorption bandwidth can be achieved as large as 6.72 *** research develops useful ideas for optimizing multicomponent microwave absorbing materials.

关键词： ternary metal-organic frameworks(MOFs) MoS_(2) flower-like morphology microwave absorption

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双基坑开挖对中间既有建筑物的影响

湖南工业大学学报 2024年第2期38卷 1-6页

作者：朱银刚李大华韩孟君张俊龙安徽建筑大学土木工程学院安徽合肥230601 安徽建工集团股份有限公司总承包分公司安徽合肥230031

以某基坑开挖工程为研究背景,通过MIDAS/GTS分析双基坑同时开挖和单独依次开挖时对中间建筑物的影响机制。研究结果表明:单独依次开挖相对于同时开挖,基坑围护结构变形最大位移值比同时开挖少了45%左右,建筑物筏板沉降位移值比同时开挖... 详细信息

以某基坑开挖工程为研究背景,通过MIDAS/GTS分析双基坑同时开挖和单独依次开挖时对中间建筑物的影响机制。研究结果表明:单独依次开挖相对于同时开挖,基坑围护结构变形最大位移值比同时开挖少了45%左右,建筑物筏板沉降位移值比同时开挖多了50%~111%左右。通过数据模拟分析出两种不同开挖方式对建筑物的最不利位置,比较出两者的差异,优化施工步骤,从而保证建筑物的安全。本双基坑开挖的研究可为此类工程提供参考。

关键词：围护结构变形双基坑开挖筏板沉降

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不同槽口位置对石材幕墙的影响

兰州工业学院学报 2024年第4期31卷 13-18页

作者：朱银刚李大华张俊龙韩孟君安徽建筑大学土木工程学院安徽合肥230601 安徽建工集团股份有限公司安徽合肥230031

以阜阳某大理岩石材幕墙项目为背景,采用Abaqus软件研究风荷载对不同尺寸幕墙石板的影响机理。结果显示:槽口距板边缘距离对槽口处应变影响小,但导致石板位移波动,70~80 mm范围内变形最大,达到3%;槽口距板边缘距离对应力影响大,随着距... 详细信息

以阜阳某大理岩石材幕墙项目为背景,采用Abaqus软件研究风荷载对不同尺寸幕墙石板的影响机理。结果显示:槽口距板边缘距离对槽口处应变影响小,但导致石板位移波动,70~80 mm范围内变形最大,达到3%;槽口距板边缘距离对应力影响大,随着距离增加,应力呈“山峰”型曲线,90 mm处峰值最大;适当增加槽口距离可提高应力值,但超出范围则会导致应力下降,位移平均值接近90 mm。通过数值模拟方法分析了石板的应力应变变化规律,有助于评估石板结构的稳定性和安全性,对类似工程提供了技术参考。

关键词：石材幕墙短槽式风荷载槽口位置应力应变

血清神经元特异烯醇化酶与中枢神经特异蛋白水平对急性缺血性脑卒中患者行重组组织型纤溶酶原激活剂静脉溶栓治疗结局的预测价值

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中华实验外科杂志 2024年第2期41卷 353-356页

作者：孙永芳黄玲玲盛天怡韩梦君浙江省新安国际医院外科嘉兴314000 山东省南山医院神经科济南250000

目的探讨血清神经元特异烯醇化酶(NSE)与中枢神经特异蛋白(S100-β)对急性缺血性脑卒中(AIS)患者行重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓治疗结局的预测价值。方法选取2021年1月至2022年12月浙江新安国际医院和山东省南山医院收治的... 详细信息

目的探讨血清神经元特异烯醇化酶(NSE)与中枢神经特异蛋白(S100-β)对急性缺血性脑卒中(AIS)患者行重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓治疗结局的预测价值。方法选取2021年1月至2022年12月浙江新安国际医院和山东省南山医院收治的156例急性缺血性脑卒中患者为研究对象, 使用rt-PA进行静脉溶栓治疗, 溶栓前后分别检测患者外周血液NSE和S100-β表达水平。溶栓后第90天采用RanKin量表(mRS)评价神经功能恢复状况。根据mRS评分结果将所选患者分为预后良好组与预后不良组, 对比两组患者的临床资料差异, 以及NSE和S100-β表达水平, 并进一步运用多因素回归分析NSE和S100-β表达水平对患者治疗预后的预测价值。结果静脉溶栓后第90天, 对患者进行mRS评分, 以mRS评分≤2分为预后良好, mRS评分3~6分为预后不良, 其中预后良好组62.18%(97例)明显高于预后不良组37.82%(59例)(P0.05]。两组患者NSE和S100-β表达水平比较, 溶栓前预后良好组在NSE、S100-β表达水平明显高于预后不良组[(27.19±6.53)、(25.13±5.17) ng/ml比(2.15±0.08)、(1.79±0.09) ng/ml, t=14.315、11.217、8.534, P12分是急性缺血性脑卒中患者rt-PA静脉溶栓治疗结局的危险因素(OR=2.58, P<0.05)。结论血清NSE、S100-β表达水平对急性缺血性脑卒中患者可进行早期预测, 有助于患者早期诊断与治疗。

关键词：急性缺血性脑卒中血清神经元特异烯醇化酶中枢神经特异蛋白

Structural and functional connectivity of the whole brain and subnetworks in individuals with mild traumatic brain injury:predictors of patient prognosis

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Neural Regeneration Research 2024年第7期19卷 1553-1558页

作者： Sihong Huang Jungong han Hairong Zheng mengjun Li Chuxin Huang Xiaoyan Kui Jun Liu Department of Radiology The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Computer Science Aberystwyth UniversityAberystwythCeredigionUK Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhenGuangdong ProvinceChina School of Computer Science and Engineering Central South UniversityChangshaHunan ProvinceChina Department of Radiology Quality Control Center of Hunan ProvinceChangshaHunan ProvinceChina Clinical Research Center for Medical Imaging of Hunan Province ChangshaHunan ProvinceChina

Patients with mild traumatic brain injury have a diverse clinical presentation,and the underlying pathophysiology remains poorly *** resonance imaging is a non-invasive technique that has been widely utilized to investigate neuro biological markers after mild traumatic brain *** approach has emerged as a promising tool for investigating the pathogenesis of mild traumatic brain injury.G raph theory is a quantitative method of analyzing complex networks that has been widely used to study changes in brain structure and ***,most previous mild traumatic brain injury studies using graph theory have focused on specific populations,with limited exploration of simultaneous abnormalities in structural and functional *** that mild traumatic brain injury is the most common type of traumatic brain injury encounte red in clinical practice,further investigation of the patient characteristics and evolution of structural and functional connectivity is *** the present study,we explored whether abnormal structural and functional connectivity in the acute phase could serve as indicators of longitudinal changes in imaging data and cognitive function in patients with mild traumatic brain *** this longitudinal study,we enrolled 46 patients with mild traumatic brain injury who were assessed within 2 wee ks of injury,as well as 36 healthy ***-state functional magnetic resonance imaging and diffusion-weighted imaging data were acquired for graph theoretical network *** the acute phase,patients with mild traumatic brain injury demonstrated reduced structural connectivity in the dorsal attention *** than 3 months of followup data revealed signs of recovery in structural and functional connectivity,as well as cognitive function,in 22 out of the 46 ***,better cognitive function was associated with more efficient ***,our data indicated that small-worldness in the acute sta

关键词： cognitive function cross-section follow-up functional connectivity graph theory longitudinal study mild traumatic brain injury prediction small-worldness structural connectivity subnetworks whole brain network

Ultrasound-guided fluid resuscitation versus usual care guided fluid resuscitation in patients with septic shock:a systematic review and meta-analysis

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Emergency and Critical Care Medicine 2024年第2期4卷 82-89页

作者： Zheyuan Chen Xiao han Ying Liu mengjun Wang Beibei Wang Ling Wang Hongxu Jin Emergency Department General Hospital of Northern Theater CommandShenyangLiaoningChina General Hospital of Northern Theater Command China Medical UniversityShenyangLiaoningChina Center for Cardiac Intensive Care Beijing Anzhen HospitalCapital Medical UniversityBeijingChina

Background:Ultrasound is widely used in critical care for fluid resuscitation in critically ill *** conducted a systematic review to assess the relationship between ultrasound-guided fluid resuscitation strategies and usual care in septic ***:We searched PubMed,Embase,Cochrane Library,Web of Science,and registers for randomized controlled trials to evaluate the prognosis of ultrasound-guided fluid resuscitation in patients with septic ***:Twelve randomized controlled studies with 947 participants were ***-guided fluid resuscitation in patients with septic shock was associated with reduced mortality(risk ratio:0.78;95%confidence interval[CI]:0.65 to 0.94;P=0.007)and 24-hour fluid volume(mean differences[MD]:−1.02;95%CI:−1.28 to−0.75;Phange the length of the free intensive care unit stay(MD:1.5;95%CI:−3.81 to 6.81;P=0.58;I^(2)=0%).Conclusion:Ultrasound-guided fluid resuscitation in patients with septic shock is beneficial,especially when using inferior vena cava-related measures and the passive leg-raising test combined with echocardiography.

关键词： Meta-analysis Mortality Resuscitation Septic shock Systematic review Ultrasonography

Making waste profitable: Efficient recovery of metallic iron from jarosite residues

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Chinese Journal of Chemical Engineering 2024年第7期71卷 66-76页

作者： Songshan Zhou Yunhui han Rong Huang Yin Huang Qingyuan Dong Haiyin Gang Jinchuan Qin Xi Yu Xiangfei Zeng Wenxing Cao Jiqin Wang Shaoqin Chen Rong Wang mengjun Chen Key Laboratory of Solid Waste Treatment and Resource Recycle(SWUST) Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Environment Key Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China School of National Defense Science and Technology College SWUST Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China

To address the hazardous by-product of zinc smelting and resource utilization of jarosite residue,this study applies an electric field-assisted hot acid treatment to completely recycle iron(Fe).This innovative approach aims to enhance the leaching efficiency of Fe from jarosite *** introduction of an electric field changes the charge distribution on the surface of the particles to enhance ions and electrons exchange and promotes the collision between particles to strengthen reaction *** on the above,the leaching efficiency of Fe in jarosite under sulfuric acid attack has improved *** result shows that Fe leaching efficiency reaches 98.83%,which is increased by 28%under the optimal experimental conditions:current density of 30 mA·cm^(-2),H_(2)SO_(4) concentration of 1.5 mol·L^(-1),solid-liquid ratio of 70 g·L^(-1),temperature of 80℃ and time of 12 *** kinetics calculations show that the apparent activation energy is 16.97 kJ·mol^(-1) and the leaching of jarosite residue is controlled by a mixture of chemical reaction and diffusion,as well as the temperature and concentration of the leaching solution have an influence on *** work provides a feasible idea for the efficient leaching of Fe from jarosite residue.

关键词： Jarosite residue Electric filed Leaching kinetics

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丁坝冲刷模式与水流形态分析研究

水利技术监督 2023年第2期 161-164,227,232页

作者：韩梦君新疆维吾尔自治区塔里木河流域干流管理局新疆库尔勒841000

为研究不同类型丁坝的冲刷模式与水流形态。文章采用水槽试验分析了不同水力条件下三角形丁坝和矩形丁坝周围形成的冲刷模式,同时测量了三角形丁坝和矩形丁坝周围的三维速度分量。结果表明,三角形丁坝的最大冲刷坑深度和最大冲刷体积均... 详细信息

为研究不同类型丁坝的冲刷模式与水流形态。文章采用水槽试验分析了不同水力条件下三角形丁坝和矩形丁坝周围形成的冲刷模式,同时测量了三角形丁坝和矩形丁坝周围的三维速度分量。结果表明,三角形丁坝的最大冲刷坑深度和最大冲刷体积均小于矩形丁坝。在数量上,前者的最大冲刷坑深度和体积分别比后者小44%和70%。根据水流形态分析,建议三角形丁坝间距不应超过结构有效长度的5.5倍。研究结果可为三角形丁坝设计标准提供一定的参考。

关键词：三角形丁坝河岸侵蚀冲刷坑矩形丁坝直河

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城市污泥堆肥过程氮素转化影响因素实验研究

山东水利 2022年第8期 16-18页

作者：韩梦君吕晓理南水北调东线山东干线有限责任公司山东济南250109

文章选择河南新乡县污水处理厂的污泥,分别用木屑、黑填料球、黄菱球作为调理剂做实验,研究不同调理剂对城市污泥堆肥发酵过程中氮素转化与NH3挥发影响的程度,筛选出能够有效减少堆肥过程中氨气挥发和氮素损失率的调理剂,可以提高污泥... 详细信息

文章选择河南新乡县污水处理厂的污泥,分别用木屑、黑填料球、黄菱球作为调理剂做实验,研究不同调理剂对城市污泥堆肥发酵过程中氮素转化与NH3挥发影响的程度,筛选出能够有效减少堆肥过程中氨气挥发和氮素损失率的调理剂,可以提高污泥堆肥的产品肥效,降低环境污染,减少污泥堆肥的运行成本,为堆肥实际生产提供可靠依据。

关键词：城市污泥堆肥过程调理剂氮素总氮

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亭子口水利枢纽引水压力钢管制作安装

水力发电 2013年第6期39卷 63-66页

作者：韩孟均嘉陵江亭子口水利水电开发有限公司四川苍溪628400

嘉陵江亭子口水利枢纽坝后大型"斜井式"引水压力钢管直径大、管壁薄,外包一层1.5 m厚混凝土,现场制造。嘉陵江亭子口水利水电开发有限公司根据以往的施工经验,结合工程实际,强化过程质量控制,严格控制制造质量,改善安装阶段钢管组装工艺... 详细信息

嘉陵江亭子口水利枢纽坝后大型"斜井式"引水压力钢管直径大、管壁薄,外包一层1.5 m厚混凝土,现场制造。嘉陵江亭子口水利水电开发有限公司根据以往的施工经验,结合工程实际,强化过程质量控制,严格控制制造质量,改善安装阶段钢管组装工艺,最大限度地减少凑合节,自制各种工装具,有效控制了产品的制造与安装质量。

关键词：压力钢管制作安装亭子口水利枢纽