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A novel multilayer high temperature solar absorber coating based on high-entropy alloy NbMoTaW:Optical properties, thermal stability and corrosion properties

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Journal of Materiomics 2021年第5期7卷 895-903页

作者： Dong-Mei Yu cheng-Yu He Shuai-Sheng Zhao Hui-Xia Guo Gang Liu xiang-Hu Gao Research and Development Center for Eco-Chemistry and Eco-Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu Province College of Chemistry&Chemical EngineeringNorthwest Normal UniversityLanzhou730070China Development Center for Eco-Chemistry and Eco-Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

With the development of new materials and technology,high entropy alloy(HEA)nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical ***,a novel SS/NbMoTaWN(HEAN)/NbMoTaWON(HEAON)/SiO_(2) coatings are prepared,which shows a high spectral selectivity of a/ε=0.944/*** preparation and optimization of the coating are studied by combining experiments with ellipsometric program and CODE *** temperature thermal stability test is performed in depth,which proves that the coating could bear 400℃ in air for 2 h,and 600℃for 2 h in ***-term thermal stability researches indicate that the SSACs still keep good optical properties(a=0.902,ε=0.106)even after annealing at 600℃ for 100 *** failure mechanism is analyzed by XRD and Raman *** addition,neutral salt spray test is performed to investigate the anti-corrosion ability,which indicates the coating has a good optical performance after soaking in 3.5 wt%NaCl solution for 30 ***,this work provides a new strategy to construct solar absorber coatings based on NbMoTaW high entropy alloy.

关键词： High-entropy alloy NbMoTaW Solar absorbing coating Optical properties Thermal stability Corrosion behavior

基于岩心和电成像测井的遗迹组构识别及其地质意义

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河南理工大学学报（自然科学版） 2024年第6期43卷 69-81页

作者：向威王晓飞崔维平牛永斌王世越汤翟李平久程怡高邵威猛中海油田服务股份有限公司河北燕郊065201 海南省深海深层能源工程重点实验室海南澄迈570100 河南理工大学资源环境学院河南焦作454000 中海石油(中国)有限公司海南分公司海南海口570100

目的为了查明琼东南盆地松涛隆起三亚组遗迹组构的发育特征,探讨其油气地质意义,方法以琼东南盆地松涛隆起三亚组代表性取心井为研究对象,根据岩心上遗迹化石与围岩发育特征,识别遗迹组构,通过校正岩心和电成像测井的深度,分析各类典型... 详细信息

目的为了查明琼东南盆地松涛隆起三亚组遗迹组构的发育特征,探讨其油气地质意义,方法以琼东南盆地松涛隆起三亚组代表性取心井为研究对象,根据岩心上遗迹化石与围岩发育特征,识别遗迹组构,通过校正岩心和电成像测井的深度,分析各类典型遗迹组构对应电成像测井的响应特征,建立琼东南盆地北部三亚组五类遗迹组构电成像测井识别的参考图版,用于连续电成像测井动态图像上遗迹组构的识别。结果结果表明:(1)研究区岩心和电成像测井图像上识别出5种遗迹组构,即Ophiomorpha-Thalassionides遗迹组构,Palaeophycus遗迹组构,Planolites-Thalassionides遗迹组构,Phycosiphon-Planolites遗迹组构和Phycosiphon-Chondrites遗迹组构;(2)对比南海北部相似沉积环境9口钻井112个层位岩心和电成像图像上识别出的遗迹组构,二者有104个层位完全吻合,识别准确度可达92.9%(8个层位因电成像质量较差,识别结果不一致),说明基于岩心和电成像测井识别琼东南盆地松涛隆起三亚组遗迹组构结果可靠、效果良好。结论该项研究对分析研究区储层的(古)沉积环境、预测其分布规律,揭示(古)生物对油气储层的改造机制具有重要意义。

关键词：岩心电成像测井遗迹组构三亚组琼东南盆地

Protective effects of human umbilical cord mesenchymal stem cells on retinal ganglion cells in mice with acute ocular hypertension

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International Journal of Ophthalmology(English edition) 2021年第2期14卷 194-199页

作者： Rui Liu Qi Shi Hong Yang Xiao-Yuan Sha Guo-cheng Yu Lian Liu Jing-xiang Zhong Department of Ophthalmology the First Affiliated Hospital of Jinan UniversityGuangzhou 510630Guangdong ProvinceChina Department of Ophthalmology Shenzhen HospitalSouthern Medical UniversityShenzhen 518100Guangdong ProvinceChina

AIM:To observe the protective effect of human umbilical cord mesenchymal stem cells(huc MSCs)on retinal ganglion cel s(RGCs)injury in mice with acute ocular hypertension(AOH).METHODS:Fifty-six adult male C57 BL/6 mice were randomly divided into four groups:normal group,AOH group,huc MSCs group,normal saline(NS)*** eye of mice was induced by 90 mm Hg intraocular pressure for 1 h to establish AOH *** MSCs 1×105/μL,1μL or NS 1μL was injected into the vitreous body the next *** fluorescent dye was used to label the 3 rd generation of huc MSCs,for tracing the cells in the vitreous cavity of *** days after the model established,hematoxylin-eosin(HE)staining was used to observe the thickness of the inner retina layer in four *** and loss rate of RGCs were evaluated by counting Brn-3 a positive cells stained by ***:On the 7 th day after AOH established,labeled huc MSCs were found in the vitreous *** staining showed that the thickness of retinal inner layer in AOH group was significantly lower than that in normal group and huc MSCs group(P0.05).Compared with AOH group,the RGCs in normal group was significantly higher;RGCs number increased in huc MSCs group and the loss rate was lower(P<0.05).Injection of NS had no protective effect on ***:In AOH mouse model,vitreous injection of hucMSCs have shown a protection for RGCs.

关键词： human umbilical cord mesenchymal stem cells glaucoma acute ocular hypertension retinal ganglion cells

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碳化硅表面氢气吸附机理研究

原子与分子物理学报 2024年第1期41卷 22-28页

作者：尹博闻曾庆丰关康王璐刘建涛刘永胜董宁张相华彭诚西北工业大学材料学院超高温结构复合材料重点实验室西安710072 华南理工大学材料科学与工程学院广州511442 西南交通大学机械工程学院成都610031 西北核技术研究所西安710024

在CVD沉积SiC过程中,载气体H_(2)与沉积SiC基体表面的反应影响沉积速率和沉积产物品质,因此研究这些微观反应机理具有十分重要的科学意义和工程价值.本文基于第一性原理研究了H_(2)在3C-SiC(111)(硅原子暴露面)和3C-SiC■(碳原子暴露面... 详细信息

在CVD沉积SiC过程中,载气体H_(2)与沉积SiC基体表面的反应影响沉积速率和沉积产物品质,因此研究这些微观反应机理具有十分重要的科学意义和工程价值.本文基于第一性原理研究了H_(2)在3C-SiC(111)(硅原子暴露面)和3C-SiC■(碳原子暴露面)面的吸附位置、吸附能、电子结构和覆盖率等吸附情况.发现H_(2)倾向于吸附在3C-SiC(111)面,H原子的最稳定吸附位为OT位(顶位)且属于化学吸附.H_(2)在吸附时会自发解离为两个H原子,以双顶位形式吸附在两个相邻的Si原子上.该过程中基体表面Si原子的电子向H偏移,此时两者的主要相互作用源于Si原子的p轨道和H的s轨道的重叠杂化.通过计算氢气在表面的覆盖率,发现吸附能随着覆盖率的增大而增大,在低H覆盖率(θ_(H)≤4/9 ML)下,H原子之间存在着较强的吸引力,随着H覆盖率的增加(θ_(H)>4/9 ML),H原子之间排斥力逐渐增大,吸附能增加趋缓,整体结构更加稳定.

关键词：第一性原理 SiC H_(2) 覆盖率吸附能

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3D Nonlinear Analysis of the Preloading Filling Spiral Case of the Jinping-I Hydropower Station

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International Journal of Technology Management 2014年第9期 63-68页

作者： XING xiang-lin College of Water Resources and Hydropower Sichuan University Chengdu Sichuan 610065 China

In consideration of the contact between the steel spiral casing and the peripheral reinforced concrete, a nonlinear analysis for the combined bearing structure of the JinPing-I preloading filling spiral case has been made with ANSYS. Contrasts of the stress of the reinforcing bars, the biggest width of the crack and the outspread section of the crack has been made with the different parameters of preloading pressure and reinforcement scheme, resulting in a reasonable preloading pressure and reinforcement scheme. This conclusion has been applied to the spiral casing of JinPing-I hydropower station.

关键词： hydraulic structures structure analysis 3D finite element preloading filling spiral casing

Resuscitative endovascular balloon occlusion of the aorta in the treatment of severe hemorrhagic shock caused by upper gastrointestinal bleeding

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World Journal of Emergency Medicine 2023年第3期14卷 247-249页

作者： Yu-lin Li Jun-yang Wang Wen Han Tao Sun Kang Lyu Shan-xiang Xu Department of Emergency Medicine the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China

Hemorrhagic shock is a life-threatening disease often encountered in emergency departments(EDs).Hemorrhagic shock caused by extensive bleeding from multiple sites is often associated with high mortality and *** recent years,resuscitative endovascular balloon occlusion of the aorta(REBOA)has been widely used in traumatic hemorrhagic shock and is considered to be an effective resuscitation measure.[1]Some studies reported that REBOA was also effective for non-traumatic hemorrhage.[2,3]In this study,we report a case of hemorrhagic shock caused by acute upper gastrointestinal bleeding that was successfully treated and received REBOA to obtain a transition *** report may provide feasible options for emergency physicians,gastroenterologists,or surgeons to more actively treat refractory gastrointestinal bleeding.

关键词： balloon hemorrhagic gastrointestinal

硅烷偶联剂改性的短切玄武岩纤维增强三元乙丙橡胶复合材料的研究

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化工新型材料 2024年第S1期52卷 199-204,211页

作者：李辉张卜方赵春霞向东王斌程金波黄浩然张旭文武元鹏西南石油大学新能源与材料学院成都610500

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙... 详细信息

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙丙橡胶相比,添加15份KH570改性的玄武岩纤维BF7得到的三元乙丙橡胶复合材料E-BF7-15,拥有更好的综合性能。其拉伸强度从12.49MPa提高到14.50MPa,提高了16.1%,撕裂强度从41.47MPa提高到51.67MPa,提高了24.6%,其耐水性和耐化学液体性能也得到明显提升。

关键词：三元乙丙橡胶玄武岩纤维复合材料纤维改性硅烷偶联剂

血清ACTH水平、降钙素原变化率对尿源性脓毒症预后的价值

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国际泌尿系统杂志 2024年第3期44卷 436-440页

作者：魏伟张铭立刘建琳程琳赵艳福张家口市第一医院泌尿外二科张家口075000

目的:探讨血清促肾上腺皮质激素(ACTH)水平、降钙素原(PCT)变化率对尿源性脓毒症的预后价值。方法:选取2021年1月至2022年3月本院收治的因上尿路结石行经皮肾镜或输尿管镜手术治疗后产生尿源性脓毒症的76例患者为研究对象,根据患者确诊... 详细信息

目的:探讨血清促肾上腺皮质激素(ACTH)水平、降钙素原(PCT)变化率对尿源性脓毒症的预后价值。方法:选取2021年1月至2022年3月本院收治的因上尿路结石行经皮肾镜或输尿管镜手术治疗后产生尿源性脓毒症的76例患者为研究对象,根据患者确诊后14 d的生存情况分为生存组(67例)和死亡组(9例)。采用酶联免疫吸附(ELISA)法检测患者的血清ACTH水平以及确诊当天和确诊后第2天患者的血清PCT水平,计算PCT变化率。采用Spearman相关性分析患者的血清ACTH水平、PCT变化率与序贯器官衰竭评分(SOFA)的相关性。采用Cox回归分析影响尿源性脓毒症患者预后的危险因素。结果:死亡组的谷丙转氨酶、谷草转氨酶、总血红素、活化部分凝血活酶时间(APTT)、血肌酐、白细胞计数高于生存组,而血红蛋白低于生存组,差异均有统计学意义(均P<0.05)。与死亡组比较,生存组患者的血清ACTH水平和SOFA评分降低,PCT变化率明显升高(均P<0.001)。Spearman相关性分析结果显示ACTH水平与SOFA评分呈正相关(r=0.533,P<0.001),PCT变化率与SOFA评分呈负相关(r=-0.600,P<0.001)。多因素Cox回归分析结果表明,ACTH高表达、低PCT变化率是影响尿源性脓毒症患者不良预后的危险因素(均P<0.05)。结论:尿源性脓毒症患者的ACTH水平明显升高,PCT变化率显著降低,二者与尿源性脓毒症患者预后密切相关。

关键词：促肾上腺皮质激素降钙素原尿源性脓毒症

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声学传感技术在昆虫检测中的应用与前景展望

环境昆虫学报 2024年第5期46卷 1068-1075页

作者：汤怡静黄河清程颖慧高瑞芳汪莹刘海军魏霜向才玉深圳海关动植物检验检疫技术中心深圳518045 深圳市仙湖植物园深圳518000 广州海关技术中心广州510623

声学传感技术作为一种简单、实用且有效的技术手段,广泛应用于农业(作物、树木)和食品安全(谷物、鲜果、干果等)相关领域,在害虫检测、监测预警、生物学研究以及防控方面取得了显著进展,并开发出了一些声测设备。本文综述了近年来几种... 详细信息

声学传感技术作为一种简单、实用且有效的技术手段,广泛应用于农业(作物、树木)和食品安全(谷物、鲜果、干果等)相关领域,在害虫检测、监测预警、生物学研究以及防控方面取得了显著进展,并开发出了一些声测设备。本文综述了近年来几种应用于昆虫检测的声学传感技术,包括碰撞声检测技术、压电传感器技术和超声波检测技术等,并对其应用前景进行了探讨,旨在为声学传感技术在昆虫检测领域的研究及应用提供参考。

关键词：传感器昆虫声学技术研究进展