Transportation electrification is regarded as one of the most significant opportunities to address social and environmental challenges posed by mass motorization rapid urbanization. Electric vehicles (EVs) are playing an essential role in realizing transportation electrification, with benefits oil conservation, local air-quality improvement, global climate change mitigation, transit mode upgrading. In principle, EVs include battery electric plug-in hybrid vehicles, service types representing...

Background For esthetic consideration, dentin color post core materials were normally used for all-ceramic crown restorations. However, in some cases, clinicians have to consider combining a full ceramic with metal core. Therefore, this experiment was conducted test the esthetical possibility of applying cast restoration. Methods The crowns on gold and Nickel-Chrome cores compared same tooth colored cores. Different try-in pastes imitate influence composite cementation different restorative...

In view of the water swelling mudstone and creep induction function formations in process oilfield injection, casing incurs collapse deformation under local lateral load. this study, according to actual characteristics second section Qing formation Songliao Basin China, yield surfaces are considered as plane plastic areas (half rhombus) with symmetric parabola shaped boundaries, a mechanical model for is presented based on principle virtual work. Four types casing, 4½″J55, 5½″J55, 4½″N80...

Bridge pier collision avoidance system is a hot research topic. As the representative of intelligent material, Magnetorheological Grease has become one main directions in bridge due to its special mechanical properties and rheological properties. In this work, we present using Material. Firstly, according characteristics collision, series Material are configured, then structure actual size given. The can be directly applied avoidance. Secondly experimental given, results analyzed. strong...

Abstract Graphene oxide (GO) was prepared by improved Hummer’s method, and the boehmite nanorods (AlOOH) were obtained hydrothermal synthesis. Hybrid fillers acquired of surface-modified ( m AlOOH) attached on GO nanoplatelets AlOOH-GO), then hybrids added into epoxy matrix. Both mechanical thermal properties resin composites increased through addition AlOOH-GO hybrid fillers. The dispersion promoted because introduction AlOOH, roughness surfaces appropriate AlOOH nano-rods, which this...

In this paper, we establish the mechanical property analysis of Single-walled Carbon Nanotubes (SWCNTs) modified beam element model based on molecular structural mechanics method. Then study properties their radial direction characteristics using finite software Abaqus. The simulated different bending stiffness with rectangular section elements C-C chemical force field. When graphene curled into arbitrary chirality SWCNTs spatial structure, adjacent position will change moment inertia beam....

Abstract Fluid movability in tight sands may not be accurately characterized by pore size-based classification methods solely because of the complex structure and heterogeneity size . In this study, on basis casting thin slices scanning electron microscope observation, was analyzed using mercury injection, NMR, micron CT to classify evaluate oil reservoir. The experiment suggest that quality reservoir is determined its structure, particularly throat radius, with microthroat being an...

As the population ages, early diagnosis and treatment of lung diseases become increasingly important. Accurate assessment aging-related changes in CT images is crucial for prevention related diseases. Traditional methods aging from are time-consuming, subjective, heavily reliant on clinical experience doctors. To address these issues, this paper proposes a method with 3D-CA Net. The feature extraction part proposed network consists four main 3D Convolutional Composite Multidimensional...

The reel laying is recognized as a cost‐effective installation process for offshore pipelines. However, the mechanical properties are modified due to plastic deformation during and lowering of reeled pipelines subsequent natural aging in service. Cyclic (CPD) conducted on X65 pipeline steel simulate strain experienced reel‐laying process, then, CPD specimen aged at 250 °C dislocation configurations gradually evolve from lines tangles into walls cells increase level. After aging, tensile...

In the process of waterflooding technology in Jilin oilfield, local radial compressive stress caused by rock deformation results casing collapse. According to statistics regarding casing-deformation characteristics, a certain number these characteristics are approximately parabola-shaped at radial-deformation bottom, and boundary whole area is symmetrical double-parabola-shaped. The main work this article focused on occurrences such deformation. Assuming that, deformation, external totally...

To realize the quantitative classification and comprehensive evaluation of tight oil reservoir in 4th Quantou Formation Songliao Basin, pore structure was quantitatively analyzed. In this study, experiments based on constant-speed mercury injection, nuclear magnetic resonance, micron CT are observation cast thin sections, scanning electron microscope is conducted. The result shows that a space mainly composed intergranular dissolved pore, residual intragranular dissolve pore. There few...

The flexible HVDC transmission technology based on the modular multilevel converter (MMC) topology has a very broad application prospect in process of large-scale renewable energy collection and transmission. This become one best choices for long-distance offshore wind power farms to connect onshore grid. In view special working conditions such as overvoltage fault state, this article proposes controllable large-capacity self-recovery energy-dissipation device first time improve transient...

Abstract In order to study the mixed traffic of non-motor vehicles and pedestrians at urban intersections, a two-dimensional cellular automata model was established by analyzing movement characteristics pedestrians, which included field, space, attributes, forward decision-making vehicles. This can reflect interweaving interference behavior in time window intersection, describe different stages crossing intersection.