搜索结果: 1-15 共查到“知识库 工学 Flow”相关记录516条 . 查询时间(0.07 秒)
Sustainable rosin acid ester as internal electron donors in Ziegler-Natta catalysts for synthesis of isotactic polypropylene with high melt flow rate
Bio-derived rosin acid esters internal electron donors Ziegler-Natta catalyst polypropylene polymerization
2023/12/11
In this contribution, novel bio-derived rosin acid ester compounds have been developed and used as internal electron donors to prepare MgCl2?supported titanium catalysts for propylene polymerization. ...
A highly proton-conductive and vanadium-rejected long-side-chain sulfonated polybenzimidazole membrane for redox flow battery
Sulfonated long side chain Polybenzimidazole Vanadium redox flow battery 1 3-Propanesultone
2023/6/19
A long-side-chain sulfonated polybenzimidazole (PBI-PS) membrane was successfully prepared by the reaction of PBI with 1, 3-propanesultone for improving the efficiencies of vanadium redox flow battery...
4D-SFM PHOTOGRAMMETRY FOR MONITORING SEDIMENT DYNAMICS IN A DEBRIS-FLOW CATCHMENT: SOFTWARE TESTING AND RESULTS COMPARISON
4D-SfM Photogrammetry Sediment dynamics monitoring Software comparison Debris flow hazard
2018/6/4
In recent years, the combination of Structure-from-Motion (SfM) algorithms and UAV-based aerial images has revolutionised 3D topographic surveys for natural environment monitoring, offering low-cost, ...
Numerical simulation of response of groundwater flow system in inland basin to density changes
Inland basin Groundwater Flow System TOUGHREACT Fluid density
2018/3/23
The developmental characteristics of groundwater flow system are not only controlled by formation lithology and groundwater recharge conditions, but also influenced by the physical properties of fluid...
Gas sorption and non-Darcy flow in shale reservoirs
Apparent gas permeability Shale Adsorbed gas Dissolved gas Surface diffusion
2018/4/2
Gas sorption and non-Darcy flow are two
important issues for shale gas reservoirs. The sorption
consists of dissolution and adsorption. Dissolved gas and
adsorbed gas are different. The former is d...
Correction of source-rock permeability measurements owing to slip flow and Knudsen diffusion: a method and its evaluation
Shale gas Permeability Knudsen diffusion Unconventional reservoir Source rock
2018/4/2
Source-rock permeability is a key parameter that controls the gas production rate from unconventional reservoirs. Measured source-rock permeability in the laboratory, however, is not an intrinsic prop...
Based on their genesis, springs are commonly classified as depression spring, contact spring, overflow spring and fault spring, etc. In addition, a kind of springs, i.e., up-flow spring, can be found ...
Visualizing complex pore structure and fluid flow in porous media using 3D printing technology and LBM simulation
3D printing Pore structure LBM Visualization
2018/3/23
Pore structures of porous media and properties of fluid flow are key factors for the study of non-Darcy groundwater flow. However, it is difficult to directly observe pore structures and flow properti...
OPTICAL FLOW APPLIED TO TIME-LAPSE IMAGE SERIES TO ESTIMATE GLACIER MOTION IN THE SOUTHERN PATAGONIA ICE FIELD
optical flow time-lapse imagery motion detection glacier
2016/11/30
In this work, we assessed the feasibility of using optical flow to obtain the motion estimation of a glacier. In general, former investigations used to detect glacier changes involve solutions that re...
ANALYSIS OF DEBRIS FLOW BEHAVIOR USING AIRBORNE LIDAR AND IMAGE DATA
Debris Flow LiDAR Digital Surface Model Geomorphologic Change
2016/11/30
The frequency of debris flow events caused by severe rainstorms has increased in Korea. LiDAR provides high-resolution topographical data that can represent the land surface more effectively than othe...
ANALYSIS OF DEBRIS FLOW DISASTER DUE TO HEAVY RAIN BY X-BAND MP RADAR DATA
M X-band MP radar GIS Disaster prevention Web-based
2016/11/30
On August 20 of 2014, Hiroshima City (Japan) was struck by local heavy rain from an autumnal rain front. The resultant debris flow disaster claimed 75 victims and destroyed many buildings. From 1:30 a...
针对当前基于软/硬件的流导出技术存在的数据失真、不易扩展等问题，本文提出一种准确、通用、易扩展的高速网络流量处理框架NTCI Flow。首先,基于PF_RING DNA实现了高性能的网络包抓取，采用基于网络包五元组的负载均衡策略对网络包进行分组分发，并利用批处理、无锁队列、多线程等技术将多个网络包封装为单条大消息并行发送，改进与优化网络包转发性能；然后,采用Kafka消息系统作为中间件接收并缓存网...
为了了解流体在球阀不同开度下的流动状态及对应的流阻系数，应用商业软件Solid Works Flow Simulation 对球阀不同开度的三维流场进行数值仿真模拟和可视化研究。模拟结果表明，在开度较小的情况下，阀芯横截面流速沿中心线呈对称分布，阀芯内部流场存在一对尺寸相等、方向相反的漩涡，且这对漩涡基本占据整个流道；同时出口管路也存在强烈的涡流，随着球阀开度的增大，流动达到稳定，漩涡消失。利用数...
The influence of woven geotextiles on ponding time and overland flow
hillslope jute and coir materials KINFIL hydrological model Norton Ladder Rainfall Simulator
2016/8/2
Nowadays, both synthetic and natural geotextiles are used to mitigate water erosion processes on hillslopes. Jute and coir are most suitable materials for the production of woven geotextiles. They are...
AN AERIAL-IMAGE DENSE MATCHING APPROACH BASED ON OPTICAL FLOW FIELD
Dense Matching Mean-SIFT Optical Flow Interpolation Multi-Constraints RANSAC
2016/7/27
Dense matching plays an important role in many fields, such as DEM (digital evaluation model) producing, robot navigation and 3D environment reconstruction. Traditional approaches may meet the demand ...