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First-order perturbation approximation for rock elastic moduli in transversely isotropic media

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Science China Earth Sciences 2017年第9期60卷 1645-1654页

作者： WU GuoChen zhao xiaolong TANG Jie DU ZeYuan School of Geoscience China University of Petroleum Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology

Seismic anisotropy is a relatively common seismic wave phenomenon in laminated sedimentary rocks such as shale and it can be used to investigate mechanical properties of such rocks and other geological materials. Young's modulus and Poisson's ratio are the most common mechanical properties determined in various rock engineering practices. Approximate and explicit equations are proposed for determining Young's modulus and Poisson's ratio in anisotropic rocks, in which the symmetry plane and symmetry axis of the anisotropy are derived from the constitutive equation of transversely isotropic rock. These equations are based on the media decomposition principle and seismic wave perturbation theory and their accuracy is tested on two sets of laboratory data. A strong correlation is found for Young's modulus in two principal directions and for Poisson's ratio along the symmetry plane. Further, there is an underprediction of Poisson's ratio along the symmetry axis, although the overall behavior follows the trend of the measured data. Tests on a real dataset show that it is necessary to account for anisotropy when characterizing rock mechanical properties of shale. The approximate equations can effectively estimate anisotropic Young's modulus and Poisson's ratio, both of which are critical rock mechanical data input for hydraulic fracturing engineering.

关键词： Seismic anisotropy Young's modulus Poisson's ratio Perturbation approximation

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电化学沉积法制备ZnO厚膜工艺研究

人工晶体学报 2024年第6期53卷 1069-1077页

作者：李岗归黄丹阳赵小龙蔡亚辉贺永宁西安交通大学微电子学院西安710049 西安交通大学微纳电子与系统集成重点实验室西安710049

X射线具有较高的光子能量,这使得其在ZnO材料中具有大的穿透深度,因此为了更有效地探测X射线,需要制备出微米甚至百微米厚度的ZnO膜。本文采用电化学沉积法快速制备14.85μm厚的ZnO膜。实验结果表明,沉积电势和电极材料会显著影响ZnO膜... 详细信息

X射线具有较高的光子能量,这使得其在ZnO材料中具有大的穿透深度,因此为了更有效地探测X射线,需要制备出微米甚至百微米厚度的ZnO膜。本文采用电化学沉积法快速制备14.85μm厚的ZnO膜。实验结果表明,沉积电势和电极材料会显著影响ZnO膜的沉积速率与表面形貌。随着沉积电势的升高,ZnO形貌由六角柱状结构变为片状结构,当电势过大时会有大量氢气生成,导致薄膜孔洞增加而无法成膜。使用金属Pt为阳极电极时,溶液会逐渐酸化,导致ZnO在沉积的同时也会溶解,当二者速率相一致时,ZnO膜厚便不再增加,因此不适合生长ZnO厚膜。而使用金属Zn为阳极电极时,溶液的pH值基本保持不变,更适合生长ZnO厚膜。使用金属Zn作为阳极电极,沉积电势为0.65 V,电解液浓度为0.4 mol/L时,实现了1 h生长14.85μm的ZnO厚膜。在5 V偏压下,基于ZnO厚膜的探测器对加速电压为40 kV的X射线的响应度可达66.8μC·Gy^(-1)·cm^(-2)。

关键词： ZnO厚膜电化学沉积法 X射线探测器沉积电势 Zn电极沉积速率

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浅谈武汉君临国际基坑工程设计施工研究

四川建材 2024年第2期50卷 76-77,90页

作者：赵小龙权威郭叶武湖北楚程岩土工程有限公司湖北武汉430000 中南勘察基础工程有限公司湖北武汉430081

随着城市化水平的不断推进,武汉作为中部地区核心,在城市建设有着突飞猛进的发展。武汉不仅注重建筑往高处发展,而且对地下工程的开发利用尤为重视。武汉君临国际深基坑工程项目地理位置重要,两层地下室,淤泥质土较厚,距离长江较近,采... 详细信息

随着城市化水平的不断推进,武汉作为中部地区核心,在城市建设有着突飞猛进的发展。武汉不仅注重建筑往高处发展,而且对地下工程的开发利用尤为重视。武汉君临国际深基坑工程项目地理位置重要,两层地下室,淤泥质土较厚,距离长江较近,采用桩撑的支护方案,对地下水采用井管降水的处理方案,施工中采用信息化施工管理,取得良好的经济效益,为后续类似项目提供依据。

关键词：地下工程支护设计施工

Spatial differentiation and dynamic mechanism of micro-geomorphology based on acoustic spectrum data of the Huanghe(Yellow)River Delta

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Journal of Oceanology and Limnology 2023年第6期41卷 2077-2089页

作者： Ping LI Yongde JIN Wei GAO xiaolong zhao First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Key Laboratory of Coastal Science and Integrated Management of Oceanography Ministry of Natural ResourcesQingdao 266061China

Submarine micro-geomorphology is a geo-morphological type occurring in shallow and surface areas of *** combined relationships and distribution of the micro-geomorphology indirectly reflect coupling relationships among the sediment deposition,dynamic environment,and geomorphologic *** differentiation and dynamic changes in micro-geomorphology were studied based on acoustic data interpretation from a wide range(3200 km^(2))of the Huanghe(Yellow)River delta(HRD).The combination of the sub-bottom profiler and the side-scan sonar methods allowed for the identification of submarine shallow micro-geomorphologic types,as well as their scale and spatial *** were seven typical micro-geomorphologic features in the shallow and surface areas of the HRD,including buried ancient channels,stratigraphic disturbances,scour troughs,sand waves,pits,erosional remnants,and sand *** coupling and superposition of the sediment,sediment characteristics,seabed scouring and silting,and hydrodynamic conditions of the Huanghe River had combined effects on the patterns of micro-geomorphologic types,characteristics,and *** the perspective of acoustic profile interpretations,the scale,range,and spatial locations of the microgeomorphology in the HRD revealed seasonal variation characteristics,and the spatial distributions displayed significant regional differentiation *** addition,strong stratigraphic disturbances and areas with densely distributed buried ancient channels reflected the activity and instability of the submarine shallow *** the interpretation of the sub-bottom profile detection data,the diversion processes of the flow paths in the lower reaches of the Huanghe River were obtained for a certain historical period in the coastal waters of the *** study further clarified the relationships between the micro-geomorphologic features and spatial combinations,which is important for research on micro-geomorphologi

关键词： Huanghe(Yellow)River delta(HRD) micro-geomorphology acoustic reflection characteristics spatial differentiation dynamic mechanisms

高原地区颅脑创伤患者术后血肿扩大的危险因素及预后分析

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中华神经外科杂志 2024年第6期40卷 606-610页

作者：魏林节宗希涛童燕翔赵晓龙储卫华林驰陆军第九五六医院神经外科(陆军临床重点培育专科) 林芝860000 云南省滇南中心医院神经外科红河661018 陆军军医大学西南医院神经外科重庆400038

目的探讨高原地区颅脑创伤患者术后血肿扩大的危险因素并分析其预后情况.方法回顾性分析2019年5月至2023年1月云南省滇南中心医院神经外科(331例)和陆军第九五六医院神经外科(22例)收治的353例高原地区颅脑创伤后行手术治疗的患者的临... 详细信息

目的探讨高原地区颅脑创伤患者术后血肿扩大的危险因素并分析其预后情况.方法回顾性分析2019年5月至2023年1月云南省滇南中心医院神经外科(331例)和陆军第九五六医院神经外科(22例)收治的353例高原地区颅脑创伤后行手术治疗的患者的临床资料.根据术后3 d内CT检查结果显示的血肿量变化情况,将其分为血肿扩大组与血肿未扩大组.收集患者的临床资料,包括有无颅内多发血肿、侧裂出血、颅骨骨折、中线移位、血清血红蛋白水平、入院血压、入院格拉斯哥昏迷评分(GCS)、血清血小板计数、合并的基础疾病、血糖水平等情况,采用单因素分析和多因素logistic回归模型探讨可能影响颅脑创伤患者术后血肿扩大的因素.出院时采用改良格拉斯哥预后评分(GOS)评估患者的预后,并比较两组患者的恢复良好(GOS≥4分)比率.绘制Kaplan-Meier生存曲线,采用log-rank检验比较两组出院时的预后.结果353例患者中,血肿扩大组34例(9.63%),血肿未扩大组319例(90.37%).与血肿未扩大组相比,血肿扩大组存在侧裂出血和颅内多发血肿患者的比例更高、入院时GCS更低、中线移位距离更大、收缩压更高(均P0.05).多因素logistic回归模型分析结果提示,中线移位明显(OR=0.34,95%CI:0.17~0.68,P=0.002)、存在侧裂出血(OR=2.16,95%CI:1.06~4.41,P=0.035)、有颅内多发血肿(OR=4.72,95%CI:2.21~10.05,P0.05).结论存在侧裂出血或颅内多发血肿、中线移位明显、入院GCS低和入院收缩压高的高原颅脑创伤患者术后更易出现血肿扩大,且血肿扩大患者的短期预后较差.

关键词：脑损伤,创伤性危险因素预后高原血肿扩大

TADF敏化荧光策略构建高效、窄光谱发光电化学池器件

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发光学报 2024年第4期45卷 651-661页

作者：陈荔丝蓝燕婷赵小龙秦冬冬张玉微陶春兰张保华牛利广州大学化学化工学院分析科学技术研究中心广州市传感材料与器件重点实验室广东省光电传感材料与器件工程技术研究中心广东广州510006 西北师范大学化学化工学院生态功能高分子材料教育部重点实验室甘肃兰州730070 华南师范大学化学学院手性药物制药过程控制与质量评价广东省药监局重点实验室广州市生物医药分析化学重点实验室广东广州510006

基于新一代热活化延迟荧光(Thermally activated delayed fluorescence,TADF)发光材料的发光电化学池(Light-emitting electrochemical cells,LECs)成为新兴的研究方向而受到关注。由于TADF发光材料电荷分离态的激子属性,该类LECs器件发光光谱半峰宽往往达到100 nm以上,难以满足LEC高色纯度的需求。鉴于此,本文尝试将TADF敏化荧光(TADF-sensitized fluorescence,TSF)的激子管控策略应用到LECs领域当中。通过筛选合适的传输主体、TADF敏化剂、高吸光系数荧光染料和离子液体固态电解质为LEC的发光层,我们成功构建了高效TSF型的LECs器件。最终获得的TSF-LECs器件峰值外量子效率(The highest external quantum ef-ficiency,EQEmax)达到3.7%,峰值亮度(The peak luminance,Lmax)达到2285 cd·m^(-2)。与TADF-LECs的参比器件相比,TSF-LECs器件的光谱半峰宽(Full width at half maximum,FWHM)从106 nm降低至38 nm。本文还详细讨论了所制备TSF-LECs器件中的能量转移和激子损失途径。该工作为进一步优化设计TSF-LECs材料和器件奠定了基础。

关键词：发光电化学池 TADF敏化荧光 BODIPYs 热活化延迟荧光

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接触网禁停区域自动识别与监测技术研究

现代城市轨道交通 2024年第5期 47-52页

作者：周海涛赵小龙周斯琛清华大学合肥公共安全研究院安徽合肥230601 合肥市城市生命线工程安全运行监测中心安徽合肥230601

当城市轨道交通列车通过接触网锚段绝缘关节处时,受电弓将从接触网工作支向非工作支过渡,此时会形成一个不宜停车的过渡区域。在列车动态行驶过程中,经过此区域对受电弓受流无影响,若列车在此区域停车,且受电弓的受流过程保持一段时间后... 详细信息

当城市轨道交通列车通过接触网锚段绝缘关节处时,受电弓将从接触网工作支向非工作支过渡,此时会形成一个不宜停车的过渡区域。在列车动态行驶过程中,经过此区域对受电弓受流无影响,若列车在此区域停车,且受电弓的受流过程保持一段时间后,极可能引发弓网事故。为避免因列车在接触网过渡区域停留时间过长而引发的弓网损伤等恶性事故,文章引入无线射频技术和列车信号控制技术,提出一种列车正线运营在接触网绝缘锚段关节过渡区域停车时自动识别与监测方法,该方法利用车载监控装置实时监测列车速度和位置信息,一旦识别到列车在危险区域内停车,车载监控装置会立即触发预警系统,控制进入危险区域的受电弓自动落下,并向司机发出声光报警,从而有效预防弓网事故的发生,增强列车正线运营的安全性。

关键词：城市轨道交通接触网自动落弓无线射频锚段关节

Application of MintDrive Automatic Precision Positioning System

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Journal of Rare Earths 2004年第Z1期22卷 355-357页

作者： Wu Fengming Yang Yonggang zhao xiaolong Zhang Zhiyuan Inner Mongolia Rate Earth Ovonic High-Power MH/Ni Battery Co.Ltd. Baotou 014030China Inner Mongolia Rate Earth Ovonic High-Power MH/Ni Battery Co.Ltd.Baotou 014030China Inner Mongolia Rate Earth Ovonic High-Power MH/Ni Battery Co.Ltd.Baotou 014030China Inner Mongolia Rate Earth Ovonic High-Power MH/Ni Battery Co.Ltd.Baotou 014030China

It is very important to locate batteries accurately and quickly during automatic battery *** or inaccurate location will negatively influence battery's consistency, quality and finished product rate.A traditional way is using sensor to detect and locate batteries directly , but because of the detecting tolerance, setting them on a fixed point exactly is almost *** problem could be completely solved by the application of mint drive automatic accurate servo locating *** operating software WorkBench test was applied to collocate the servo locating driver for a most optimized *** based on the requirement of real location, program and test the locating action with a programming software and finally upload all the locating information to MicroLogix 1200 PLC, the PLC will control the running on each station telling when to locate, where is the location and how to eliminate bad *** this intelligent servo locating system has the advantages of powerful function, simple operation, high controlling and locating accuracy and easy maintenance, it is very suitable to be adopted by automatic battery making *** is regarded as a very advanced method of control currently for reducing waste material due to inaccurate location and tough adjustment.

关键词： servo positioning servo ring PID PLC

PMAC Principle and Its Application to Cell Winding

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Journal of Rare Earths 2004年第Z1期22卷 352-354页

作者： zhao xiaolong Yang yonggang Zhang Zhiyuan Wu Fengming Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China

The structure and principle of the PMAC (Programmable Multi-Axis Controller) were *** implementation of PMAC hardware was illustrated by taking the winding process of one cell for *** main obvious character of PMAC is to complete a movement program in turns of movement *** PMAC is notified to execute a motion program, it will process one command every time and finish all the calculation to be ready for real *** card works always prior to real action, when necessary, it can always coordinate correctly with the action which will be carried out soon PMAC will automatically carry out the function of resource management periodically to make sure that the whole system is in correct *** also, it can communicate with host computer anytime even during a movement *** responsibility of PMAC is to organize command according to priority to optimize the system, so as to run the application program safely and *** function and application of control were emphasized.

关键词： PMAC winding machine control encoder arbor movement program