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Numerical study on transient flow in the deep naturally fractured reservoir with high pressure

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Science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 1074-1085页

作者： LIU YueWu chen weiliang LIU QingQuan Division of Engineering Science Institute of MechanicsChinese Academy of SciencesBeijing 100190China

According to the experimental results and the characteristics of the pressure-sensitive fractured formation, a transient flow model is developed for the deep naturally-fractured reservoirs with different outer boundary conditions. The finite element equations for the model are derived. After generating the unstructured grids in the solution regions, the finite element method is used to calculate the pressure type curves for the pressure-sensitive fractured reservoir with different outer boundaries, such as the infinite boundary, circle boundary and combined linear boundaries, and the characteristics of the type curves are comparatively analyzed. The effects on the pressure curves caused by pressure sensitivity module and the effective radius combined parameter are determined, and the method for calculating the pressure-sensitive reservoir parameters is introduced. By analyzing the real field case in the high temperature and pressure reservoir, the perfect results show that the transient flow model for the pressure-sensitive fractured reservoir in this paper is correct.

关键词： seepage transient flow mathematical model numerical method fractured reservoir high pressure

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双管联动多维一体的中药药剂学教学模式探索

中国中医药现代远程教育 2025年第4期23卷 4-6页

作者：陈娇婷陈维良温丽娟赣南医科大学药学院药剂学教研室江西赣州341000

基于传统中药药剂学教学模式存在的问题,探讨中药药剂学教学创新思路及举措。一方面,将中药药剂学和中药学综合实验两门课程教学相融合,使其双向渗透、交叉互补,形成“双管联动”教学模式,增强教学的连贯性、综合性;另一方面,采用线上... 详细信息

基于传统中药药剂学教学模式存在的问题,探讨中药药剂学教学创新思路及举措。一方面,将中药药剂学和中药学综合实验两门课程教学相融合,使其双向渗透、交叉互补,形成“双管联动”教学模式,增强教学的连贯性、综合性;另一方面,采用线上线下混合式教学模式,激发学生作为主体的主动性和创造性,提高学生专业水平,将思政元素与课程教学有机衔接,激发学生对中医药文化传承和创新的责任感、使命感,实现德育渗透、专业培养“多维一体”的育人目的。

关键词：中药药剂学双管联动多维一体混合式教学课程思政教学改革

Preparation of 3D MnO2/Polyaniline/Graphene Hybrid Material viaInterfacial Polymerization as High-Performance Supercapacitor Electrode

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Chinese Journal of Chemistry 2016年第8期34卷 839-846页

作者： Zheng Liu weiliang chen Xin Fan Jianyang Yu Yu Zhao Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials College of Materials Science & Engineering Guilin University of Technology Guilin Guangxi 541004 China

MnO2/polyaniline/graphene composite as a supercapacitor electrode material was synthesized through an interfacial polymerization approach in the interface of oil/water phase. The as-synthesized MPG is characterized by infrared spectroscopy, XRD, XPS, SEM and TEM, and its electrochemical performance is measured by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The 3D nanostructure of MPG and loose nanorod structure of polyaniline (PANI) coated with round MnO2 pellets could be clearly observed. The maximum energy density of MPG is 45.4 Wh/kg (at a power density of 67.8 kW/kg) and the highest power density is 229.2 kW/kg (at an energy density of 25.7 Wh/kg). The capacitance retentions after 500 cycles at the scan rate of 5 mV/s for MGP composite and PANI/graphene are 70.4% and 59.1%, respectively, and the capacitance values after 500 cycles are 158.4 F/g and 114.8 F/g, respectively. The improved performance of MPG is due to the 3D nanostructure, loose nanorod structure of PANI and stable support of graphene, which prevent the mechanical deformation effectively during the fast charge/discharge process and facilitate the diffusion of the electrolyte ions into the inner region of active materials. The composite material is very promising for the next generation of high-performance supercapacitors electrode.

关键词： graphene polyaniline MnO2 interfacial polymerization supercapacitor

Response of Soil Moisture to Rainfall Event in Black Locust Plantations at Different Stages of Restoration in Hilly-gully Area of the Loess Plateau, China

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Chinese Geographical Science 2020年第3期30卷 427-445页

作者： chen weiliang LI Zongshan JIAO Lei WANG Cong GAO Guangyao FU Bojie State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sci-encesBeijing 100085 University of Chinese Academy of Sciences Beijing 100049China School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China

Precipitation plays an important role in the water supplies that support ecological restoration by sustaining large-scale artificial plantations in arid and semiarid regions, especially black locust(Robinia pseudoacacia) plantations(RP plantations), which are widely planted due to R. pseudoacacia being an excellent pioneer species. Characterizing the response of soil moisture to rainfall events at different stages of restoration is important for assessing the sustainability of restoration in RP plantations. In this study, we quantified the response of soil moisture to rainfall events at different years of restoration(15, 20 and 30 yr) representing different restoration stages in RP plantations in a typical hilly-gully area, i.e., the Yangjuangou Catchment, of the Loess Plateau, China. Over the growing season(June to September) of 2017, smart probes were placed at nine depths(10, 20, 40, 60, 80, 100, 120, 150, and 180 cm below the soil surface) to obtain volumetric soil water information at 30-min intervals in the three RP plantations. The advance of the wetting front was depicted, and the total cumulative water infiltration was measured. Soil moisture was mainly replenished by eight heavy rainfall events(mean rainfall amount = 46.3 mm), accounting for 88.7% of the rainfall during the growing season. The mean soil moisture content profiles of RP plantations at the three restoration stages were ordered as 30-yr(14.07%) > 20-yr(10.12%) > 15-yr(8.03%), and this relationship displayed temporal stability. Soil moisture was primarily replenished by rainfall at the 0-60 cm soil depth, and soil moisture remained stable below the 100-cm soil depth. The rainfall regime influenced the advancement of the wetting front. Here, a single rainfall event of 30 mm was the rainfall threshold for infiltration into the 60-cm soil layer. The total infiltration time ranged from 310.5-322.0 h, but no significant differences were found among RP plantations at different restoration stages. You

关键词： artificial-forest ecosystem hilly-gully area restoration stages soil water replenishment rainfall regimes rainfall event

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基于响应曲面法优化氧化锌还原过程的研究

中南大学学报(自然科学版) 2025年第1期56卷 11-18页

作者：何昶浩陈为亮金诗尧杨长江李云闵小波曾平生昆明理工大学真空冶金国家工程研究中心云南昆明650093 昆明理工大学冶金与能源工程学院云南昆明650093 中南大学冶金与环境学院湖南长沙410083 深圳市中金岭南有色金属股份有限公司韶关冶炼厂广东韶关512024

本文以铅锌烧结矿为原料,采用响应曲面法研究了不同因素之间的交互作用对氧化锌还原过程的影响。首先,选定还原温度、还原时间、配炭量这3个工艺参数作为影响因子,以锌还原率作为响应值,通过基于中心组合设计的响应曲面法设计出三因素... 详细信息

本文以铅锌烧结矿为原料,采用响应曲面法研究了不同因素之间的交互作用对氧化锌还原过程的影响。首先,选定还原温度、还原时间、配炭量这3个工艺参数作为影响因子,以锌还原率作为响应值,通过基于中心组合设计的响应曲面法设计出三因素五水平的优化实验方案;其次,对优化实验结果进行拟合,得到了氧化锌还原过程的回归模型;最后,利用回归模型对氧化锌还原过程进行优化。研究结果表明:氧化锌还原过程模型精度高,还原温度和还原时间对锌还原率的影响显著,在还原温度为1 422 K、还原时间为18.7 min、2.94倍理论配炭量的优化条件下,锌还原率的预测值为94.13%,验证实验值为94.36%,与预测值的相对误差为0.24%,说明优化方案准确、可靠,并达到了优化工艺参数的目的。

关键词：氧化锌还原响应曲面法优化

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溶液全浸泡的磷酸钾镁水泥浆体中的硫酸盐侵蚀行为研究

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硅酸盐通报 2025年第1期44卷 31-39页

作者：侯宇颖杨建明徐晓晖胡雪欣陈为亮胡夏闽蒋德权熊才强李涛三江学院土木工程学院南京210012 江苏省低碳材料与绿色结构工程研究中心南京210012 盐城工学院土木工程学院盐城224002 中建八局第三建设有限公司南京210046

通过宏观性能测试、化学分析和微观分析,本文研究了磷酸钾镁水泥(MKPC)浆体试件浸泡在质量分数为5%Na_(2)SO_(4)溶液中的硫酸根离子扩散及强度发展规律。结果表明,随着浸泡龄期的延长,试件内部硫酸根离子的含量逐步提高,侵蚀深度逐渐增... 详细信息

通过宏观性能测试、化学分析和微观分析,本文研究了磷酸钾镁水泥(MKPC)浆体试件浸泡在质量分数为5%Na_(2)SO_(4)溶液中的硫酸根离子扩散及强度发展规律。结果表明,随着浸泡龄期的延长,试件内部硫酸根离子的含量逐步提高,侵蚀深度逐渐增加。硫酸根离子的侵蚀深度与硫酸根离子含量之间的关系基本满足2阶或3阶多项式(相关系数R^(2)大于0.998),采用Fick第二扩散定律解析式求解得到MKPC试件的硫酸根离子扩散系数均为10^(-7) mm^(2)/s数量级,比硅酸盐水泥混凝土小一个数量级。浸泡龄期不超过180 d时,MKPC试件的硫酸根离子扩散系数呈下降趋势;超过180 d后,MKPC试件的硫酸根离子扩散系数逐步提高;浸泡360 d后,试件的硫酸根离子扩散系数为3.9×10^(-7)mm^(2)/s,离表面2 mm处的硫酸根离子含量为0.218%(质量分数)。MKPC试件的强度随着浸泡龄期的延长先增大后减小,其发展规律和扩散系数变化规律一致。浸泡360 d后,MKPC试件的抗折和抗压强度损失率均小于5%。

关键词：磷酸钾镁水泥硫酸盐侵蚀浸泡龄期侵蚀深度扩散系数强度

Effects of land use patterns on slope soil water in the semiarid Loess Plateau,China

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Journal of Geographical Sciences 2022年第4期32卷 701-716页

作者： JIAO Lei YANG Wenhui JIA Tian MAIERDANG Keyimu chen weiliang GAO Guangyao WANG Shuai LIU Jianbo WANG Cong School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China National Observation and Research Station of Earth Critical Zone on the Loess Plateau in Shaanxi Beijing 100875China Faculty of Geographical Science Beijing Normal UniversityTianjin 300387China Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal UniversityXi'an 710061China

Land use patterns(LUPs)are the form in which various land use types are combined spatially,evidently impacting soil ***,the influence mechanism by which LUPs form remains *** this study,the soil water content(SWC)in the 0–160-cm soil depth was observed in shrubland(SL),mature forestland(MF),grassland(GL)and young forestland(YF)sites on four slopes with different LUPs in the Yangjuangou catchment of the Chinese Loess *** SWC in SL-YF-SL(13.28%)was significantly greater than that in YF-MF(9.93%),MF-GL-YF(10.38%)and SL-MF(10.83%)and was temporally stable during the study *** spatial distribution of SWC along the slope differed among the four *** characteristics and soil texture mainly determined the spatial variations in SWC in the shallow soil layers(0–40 cm),while topographic factors were the determinants in the deep soil layers(60–160 cm)as well as in the entire soil profile(0–160 cm).The significance of SWC differences among the various land use patterns increased with decreasing precipitation during the growing ***-MF(77.8 mm)and SL-YF-GL(73.9 mm)required more rainwater than SL-MF(68.2 mm)and MF-GL-MF(67.5 mm)to compensate for the loss of soil water on the monthly scale during the rainy ***,vegetation restoration should consider land use patterns on hillslopes for soil water conservation.

关键词： land use patterns land management soil water resource vegetation restoration hillslope

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基于MFCCG-PCA的语音情感识别

北京大学学报（自然科学版） 2015年第2期51卷 269-274页

作者：陈炜亮孙晓合肥工业大学情感计算与先进智能机器实验室合肥230001

针对语音情感值维度大、难处理的问题,结合MFCC改进算法和PCA模型,进行二次优化,提出一种新的语音情感值提取模型MFCCG-PCA。多组实验表明,相比一般的MFCC模型,MFCCG-PCA模型在语音情感识别方面的性能有较大提高。

关键词：语音情感梅尔频率倒谱系数主成分析 MFCCG-PCA 支持向量机 CASIA汉语情感语料库

阳明学中“无”的思想探析——以查铎《水西会语》为例

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孔子研究 2020年第6期 139-148页

作者：陈伟良浙江大学人文学院杭州310007

儒家传统中特有的“无”的思想在晚明的阳明学中得到了极大的高扬,晚明阳明学第三代人物查铎即对阳明学中“无”有深刻的体认。对查铎所著《水西会语》作一分析后可见,其以王龙溪的“四无论”为旨归,通过“何思何虑”“不落情识”“即... 详细信息

儒家传统中特有的“无”的思想在晚明的阳明学中得到了极大的高扬,晚明阳明学第三代人物查铎即对阳明学中“无”有深刻的体认。对查铎所著《水西会语》作一分析后可见,其以王龙溪的“四无论”为旨归,通过“何思何虑”“不落情识”“即动即静”“本体真乐”四个方面,对阳明学中“无”的思想进行了具体的阐发,反映了阳明学“无”的思想在晚明儒学人物中受到了进一步的接受。

关键词：查铎《水西会语》无阳明学