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SDHA和DVA钢抗铝液熔损性能研究

上海金属 2024年第3期46卷 23-32页

作者：杨航苏宁白植雄吴晓春上海大学材料科学与工程学院上海200444 上海大学省部共建高品质特殊钢冶金与制备国家重点实验室上海200444

采用静态浸泡和动态搅拌法,研究了SDHA与DVA钢在650~800℃的ADC12铝液中的抗熔损性能。采用光学显微镜、X射线衍射仪、扫描电子显微镜和能谱仪,观察和分析了熔损后试样表面及截面形貌、物相组成,用质量损失法评定了试样的抗熔损性能,并... 详细信息

采用静态浸泡和动态搅拌法,研究了SDHA与DVA钢在650~800℃的ADC12铝液中的抗熔损性能。采用光学显微镜、X射线衍射仪、扫描电子显微镜和能谱仪,观察和分析了熔损后试样表面及截面形貌、物相组成,用质量损失法评定了试样的抗熔损性能,并探讨了这两种钢的熔损机制。结果表明:在650~800℃,两种钢与熔融铝液反应均生成了Al_(8)Fe_(2)Si相,SDHA和DVA钢中Al_(8)Fe_(2)Si相的生长激活能分别为94.50和72.59 kJ/mol。因此,DVA钢中的Al_(8)Fe_(2)Si相更易形核长大。当熔损时间从10 min增加到30 min时,SDHA钢的质量损失率从3.9%增加到14.0%,DVA钢的质量损失率从4.2%增加到12.7%。随着熔损时间的延长,SDHA钢发生了晶间腐蚀,导致基体剥落,质量损失率增大。

关键词：铝合金熔体抗熔损性能金属间化合物熔损机制

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Interaction Between Memory Load and Experimental Design on Brain Connectivity and Network Topology

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Neuroscience Bulletin 2023年第4期39卷 631-644页

作者： Heming Zhang Xin Di Bart Rypma hang yang Chun Meng Bharat Biswal The Clinical Hospital of Chengdu Brain Science Institute MOE Key Laboratory for NeuroinformationCenter for Information in MedicineSchool of Life Science and TechnologyUniversity of Electronic Science and Technology of ChinaChengdu611731China Department of Biomedical Engineering New Jersey Institute of TechnologyNewark07102USA Department of Psychology University of Texas at DallasDallas75390USA

The conventional approach to investigating functional connectivity in the block-designed study usually concatenates task blocks or employs residuals of task *** providing many insights into brain functions,the block design adds more manipulation in functional network analysis that may reduce the purity of the blood oxygenation level-dependent *** studies utilized one single long run for task trials of the same condition,the so-called continuous design,to investigate functional connectivity based on task functional magnetic resonance *** brain activities associated with the single-task condition can be directly utilized for task-related functional connectivity assessment,which has been examined for working memory,sensory,motor,and semantic task experiments in previous *** it remains unclear how the block and continuous design influence the assessment of task-related functional connectivity *** study aimed to disentangle the separable effects of block/continuous design and working memory load on task-related functional connectivity networks,by using repeated-measures analysis of *** 50 young healthy adults,behavioral results of accuracy and reaction time showed a significant main effect of design as well as interaction between design and *** results revealed that the cingulo-opercular,fronto-parietal,and default model networks were associated with not only task activation,but significant main effects of design and load as well as their interaction on intra-and inter-network functional connectivity and global network ***,a significant behavior-brain association was identified for the continuous *** work has extended the evidence that continuous design can be used to study task-related functional connectivity and subtle brain-behavioral relationships.

关键词： Working memory Functional connectivity Network topology Block design Continuous design Memory load

广西融水374矿床外围地电提取测量法找矿预测

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现代地质 2024年第1期38卷 214-223页

作者：张健文美兰叶武蒋小明谭江东杨航罗海怡刘攀峰蒋羽雄桂林理工大学地球科学学院隐伏矿床预测研究所广西桂林541004 广西壮族自治区三○五核地质大队广西柳州545007

开展矿区外围找矿工作是矿山增储、缓解资源危机的有效手段。为了查明广西融水374铀矿床外围铀矿并圈定成矿预测靶区,本研究利用地电提取测量法进行探索。在含矿剖面开展找矿可行性试验,结果表明在已知矿体正上方能获得清晰的主成矿元... 详细信息

开展矿区外围找矿工作是矿山增储、缓解资源危机的有效手段。为了查明广西融水374铀矿床外围铀矿并圈定成矿预测靶区,本研究利用地电提取测量法进行探索。在含矿剖面开展找矿可行性试验,结果表明在已知矿体正上方能获得清晰的主成矿元素异常,示矿效果显著,说明利用该方法在研究区进行找矿是可行和有效的。通过对13种地电提取元素进行因子分析和聚类分析,获得F1(Pb-Zn-Ce-Eu-La-Nd-Yb)、F2(U-Th-As)、F3(Sb-W)、F4(Mo)4种元素组合因子并确定F2因子为研究区主成矿因子,F1因子为伴生因子。绘制F1和F2因子得分异常图,对元素组合异常的分布进行分析,发现w(U)/w(Th)>1/3的异常区域对寻找铀矿具有重要参考价值。根据单元素因子、F1因子、F2因子以及w(U)/w(Th)值异常特征,结合研究区地质背景,共圈定两处靶区,其中Ⅱ号靶区成矿前景更大,是进一步寻找隐伏铀矿的有利地区。

关键词： 374矿床地电提取异常特征找矿预测广西融水

Performance Evaluation of Three-Dimensional UWB Real-Time Locating Auto-Positioning System for Fire Rescue

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Intelligent Automation & Soft Computing 2023年第9期37卷 3039-3058页

作者： hang yang Xunbo Li Witold Pedrycz School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Department of Electrical and Computer Engineering University of AlbertaEdmontonT6G 1H9Canada School of Information Engineering Southwest University of Science and TechnologyMianyang621000China

Fire rescue challenges and solutions have evolved from straightfor-ward plane rescue to encompass 3D space due to the rise of high-rise city ***,this study facilitates a system with quick and simplified on-site launching and generates real-time location data,enabling fire rescuers to arrive at the intended spot faster and correctly for effective and precise ***-positioning with step-by-step instructions is proposed when launching the locating system,while no extra measuring instrument like Total Station(TS)is ***-time location tracking is provided via a 3D space real-time locating system(RTLS)constructed using Ultra-wide Bandwidth technology(UWB),which requires electromagnetic waves to pass through concrete walls.A hybrid weighted least squares with a time difference of arrival(WLS/TDOA)positioning method is proposed to address real path-tracking issues in 3D space and to meet RTLS requirements for quick computing in real-world *** 3D WLS/TDOA algorithm is theoretically constructed with the Cramer-Rao lower bound(CRLB).The computing complexity is reduced to the lower bound for embedded hardware to directly compute the time differential of the arriving signals using the time-to-digital converter(TDC).The results of the experiments show that the errors are controlled when the positioning algorithm is applied in various complicated situations to fulfill the requirements of engineering *** statistical analysis of the data reveals that the proposed UWB RTLS auto-positioning system can track target tags with an accuracy of 0.20 m.

关键词： 3D space positioning ultra-wideband real-time locating system time difference of arrival Cramer-Rao lower bound fire rescue

引导式想象放松结合授权教育对白内障合并青光眼患者术后健康行为、视力及眼压的影响

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河南医学研究 2024年第5期33卷 929-932页

作者：张玲周纪妹李慧芳杨航郑州大学第一附属医院眼科河南郑州450000 郑州大学第一附属医院综合医学部河南郑州450000

目的观察引导式想象放松结合授权教育对白内障合并青光眼患者术后健康行为、视力及眼压的影响。方法选取2021年1月至2023年1月郑州大学第一附属医院收治的白内障合并青光眼术后患者120例(158只眼),以随机数表法分为研究组与对照组,各60... 详细信息

目的观察引导式想象放松结合授权教育对白内障合并青光眼患者术后健康行为、视力及眼压的影响。方法选取2021年1月至2023年1月郑州大学第一附属医院收治的白内障合并青光眼术后患者120例(158只眼),以随机数表法分为研究组与对照组,各60例(79只眼),对照组患者接受常规护理,研究组则在对照组基础上接受引导式想象放松结合授权教育。比较两组健康行为、视力、眼压、焦虑量表(SAS)及抑郁量表(SDS)评分,并统计两组干预期间并发症的发生情况。结果干预后两组健康行为评分、视力均较干预前增加,研究组较对照组高(P<0.05)。干预后两组眼压、前房深度、SAS及SDS评分较干预前降低,研究组较对照组低(P<0.05)。研究组并发症发生率(3.33%)低于对照组(13.33%)(P<0.05)。结论引导式想象放松结合授权教育能促进白内障合并青光眼患者术后健康行为养成,同时有利于改善视力、眼压及心理状态,并降低术后并发症发生率。

关键词：引导式想象放松授权教育白内障青光眼

Reynolds-number scaling analysis on lift generation of a flapping and passive rotating wing with an inhomogeneous mass distribution

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Chinese Journal of Aeronautics 2024年第2期37卷 259-269页

作者： Suyang QIN Haotian hang yang XIANG Hong LIU J.C.Wu center for aerodynamics school of aeronautics and astronauticsshanghai jiao tong universityshanghai 200240china

Insects usually fly by passively rotating wings,which has been applied to the design of flapping-wing Micro-Air Vehicles(MAVs)to reduce mechanical *** this paper,a robotic passive rotating-wing model is designed to investigate wing kinematics and lift generation,which are measured by a high-speed camera and a force transducer,*** addition,flow fields are measured using the Particle Image Velocimetry(PIV).Experimental results demonstrate that passive rotating motion has a coordinative relationship with actively stroking *** the stroke amplitude or frequency increases,the rotating amplitude is *** characterize the active stroking motion,a driving Reynolds number Redrivingis defined,which varies from 68 to 366 in this *** the gravity center of the wing towards trailing ed ge induces the increase of additional torque M,which decreases the wing rotating amplitude and promotes the advance of wing *** find that the timing of wing rotation is gradually delayed and the mean lift coefficient C^(-)_(L)monotonously decreases as *** increasing the additional torque M,C^(-)_(L)is slightly improved and approaches to the lift coefficient of a real fruit fly at driving Re approximately equal to *** instantaneous lifts combined with the vortical structures further demonstrate that the lift generation associated with wing rotation is mainly attributed to the growth of the LeadingEdge Vortex(LEV)and the passive wake capture *** wake capture is influenced by LEV,reversal stroke motion and wing additional torque together,which can only maintain the lift at a high level for a considerable *** high-lift generation mechanisms of flapping and passive rotating flight could shed light on the simplified design of MAVs and the improvement of their aerodynamic performance.

关键词： Flapping flight Unsteady lift Passive rotation Vortex flow Leading-edge vortex

Solidification and utilization of water-based drill cuttings to prepare ceramsite proppant with low-density and high performance

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Petroleum Science 2022年第5期19卷 2314-2325页

作者： hang yang Yun-Li Liu Guo-Liang Bai Zhen Feng Yi Zhang Shi-Bin Xia School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan430070HubeiPR China State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072HubeiPR China

Water-based drill cuttings(WBDC)and bauxite are used as raw materials to prepare proppants with low density and high *** effects of sintering temperature,sintering period,mixture ratios of materials,doping with iron oxide,and acid modification of WBDC on the properties of proppants are *** proppant performance is evaluated according to the national standard SY/*** morphology of the proppant is analyzed using scanning electron microscopy(SEM).The crystal phase structure of the proppant is studied using X-ray diffraction(XRD).Thermal analysis of the proppant sintering process is performed using thermogravimetry(TG).Proppant Z-23 completely satisfied the SY/T5108-2014 *** study provides a new perspective for the resource utilization of water-based drill cuttings and preparation of low-density proppants.

关键词： Water-based drill cuttings Proppant Thermal analysis Solid waste

镧改性虾壳低温热解制备的生物炭对池塘养殖废水磷吸附的研究

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水生生物学报 2024年第2期48卷 253-263页

作者：韩孟飞徐栋武俊梅曹涛涛白国梁陈迪松杨夯吴振斌中国科学院水生生物研究所淡水生态与生物技术国家重点实验室武汉430072 中国科学院大学北京100049 武汉市生态环境科技中心武汉430015 武汉理工大学武汉430063

为提高生物炭对磷的去除效果和将厨余废弃物的资源化利用,文章以废弃虾壳为原料,用NaOH将LaCl_(3)以La(OH)_(3)沉淀形式附着在虾壳表面,进行热解得镧改性生物炭(CSLa)。采用XRF、SEM、BET、FTIR和XRD对改性前后的生物炭表征分析。采用... 详细信息

为提高生物炭对磷的去除效果和将厨余废弃物的资源化利用,文章以废弃虾壳为原料,用NaOH将LaCl_(3)以La(OH)_(3)沉淀形式附着在虾壳表面,进行热解得镧改性生物炭(CSLa)。采用XRF、SEM、BET、FTIR和XRD对改性前后的生物炭表征分析。采用吸附等温线模型和吸附动力学模型拟合生物炭的吸磷特征。研究了改性剂用量、初始pH、共存干扰离子对生物炭吸附磷的影响。结果表明镧化合物负载在生物炭表面,对磷吸附能力明显提高,最大理论吸附量为160.51 mg/g,与CS400磷最大吸附量(100.60 mg/g)相比约提高60%。在低浓度或高浓度磷溶液条件下,CSLa对磷吸附量和去除率均高于CS400,在实际水产养殖废水中更实用。吸附过程主要受化学吸附、颗粒内扩散控制。有关机理分析的结论表明表面沉淀作用、静电吸引、配体交换和内层络合作用是CSLa吸附磷的主要机理。CSLa更适合在弱酸性环境中除磷,不过在碱性环境条件下其吸附量也比较高。HCO_(3)^(-)和CO_(3)^(2-)对CSLa磷吸附有一定的抑制作用。研究以低温400℃为热解温度制备镧改性生物炭,不仅提升了生物炭对磷的吸附量和去除率,而且消耗热能较少,更有利于实际应用。

关键词：虾壳生物炭磷酸盐吸附镧改性

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m^(6)A阅读蛋白IGF2BP1对食管鳞状细胞癌细胞生物学行为的影响及其机制探讨

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基因组学与应用生物学 2024年第6期43卷 1078-1092页

作者：孙姗潘英杰谭劲松杨航彭利红冯刚刘康宋桂芹川北医学院基础医学与法医学研究所南充637100 南充市中心医院·川北医学院第二临床医学院组织工程与干细胞研究所南充637100

本研究旨在探讨胰岛素样生长因子-2 mRNA结合蛋白1(insulin like growth factor 2 mRNA binding protein 1,IGF2BP1)对食管鳞状细胞癌(esophageal squamous cell carcinoma,ESCC)细胞体外功能的影响及其作用机制。利用TIMER2.0数据库、免疫组化及实时定量PCR(real-time quantitative PCR,RT-qPCR)分析IGF2BP1在ESCC组织和癌旁组织中的蛋白及mRNA水平。采用siRNA敲低IGF2BP1在KYSE30和TE-1细胞中的表达,利用CCK-8实验、平板集落形成实验、划痕愈合实验、Transwell实验以及流式细胞术检测敲低IGF2BP1对细胞功能的影响。利用Western blot检测敲低IGF2BP1对上皮间质转化(epithelial-mesenchymal transition,EMT)相关蛋白及PI3K/AKT通路磷酸化水平的影响。利用STRING、GEPIA数据库筛选出与IGF2BPl蛋白互作的其余N^(6)-甲基腺嘌呤(N^(6)-methyladenosine,m^(6)A)甲基化酶并进行差异表达分析。通过RM2Target、SRAMP数据库预测下游靶基因及其m^(6)A修饰位点。结果显示,IGF2BP1在ESCC组织和细胞中高表达(P<0.05或P<0.001);敲低IGF2BP1后KYSE30和TE-1细胞增殖、迁移和侵袭能力减弱(P<0.05或P<0.001),细胞凋亡增多(P<0.05或P<0.001),同时促进E-cadherin的表达(P<0.05或P<0.01),抑制N-cadherin、Vimentin的表达(P<0.05或P<0.01)以及PI3K/AKT通路的磷酸化(P<0.05或P<0.01);锌指CCCH结构域蛋白13(zinc finger CCCH domain containing protein 13,ZC3H13)与IGF2BP1蛋白互作且在ESCC中的表达水平与IGF2BP1正相关;ZC3H13和IGF2BP1共同调控的潜在靶基因CNNM2、KIAA1549、SP3均具有高可信度的m^(6)A修饰位点。本研究提示,IGF2BP1可能通过m^(6)A依赖的方式与其余m^(6)A甲基化酶协调作用,激活PI3K/AKT通路的磷酸化而促进ESCC细胞的增殖、迁移、侵袭,抑制细胞凋亡,并促进EMT进程,发挥致癌作用。

关键词：食管鳞状细胞癌胰岛素样生长因子-2 mRNA结合蛋白1(IGF2BP1) N^(6)-甲基腺嘌呤(m^(6)A) 增殖侵袭凋亡