235 research outputs found
Optimization and Innovation of the Ideological and Political Education Paradigm in Adult Colleges
This paper first analyzed the necessity of optimizing and innovating the paradigm of ideological and political in adult colleges, and then elaborated the connotations of the paradigm and the ideological and political education paradigm in adult colleges. Moreover, existing problems of the ideological and political education paradigm in adult colleges were analyzed. On this basis, five paths were proposed to construct the paradigm of Integrate Organism for ideological and political education in adult colleges
The impact of web design on e-branding
This paper examines how properly designed web sites support e-branding as well as convey product information to potential customers as a substitute for buyers\u27 own information gathering activities. Design guidelines to support e-branding are provided. Afterwards, survey results from online consumers are reported followed by future research issues
Grindability and Surface Integrity of Cast Nickel-based Superalloy in Creep Feed Grinding with Brazed CBN Abrasive Wheels
AbstractThe technique of creep feed grinding is most suitable for geometrical shaping, and therefore has been expected to improve effectively material removal rate and surface quality of components with complex profile. This article studies experimentally the effects of process parameters (i.e. wheel speed, workpiece speed and depth of cut) on the grindability and surface integrity of cast nickel-based superalloys, i.e. K424, during creep feed grinding with brazed cubic boron nitride (CBN) abrasive wheels. Some important factors, such as grinding force and temperature, specific grinding energy, size stability, surface topography, microhardness and microstructure alteration of the sub-surface, residual stresses, are investigated in detail. The results show that during creep feed grinding with brazed CBN wheels, low grinding temperature at about 100 °C is obtained though the specific grinding energy of nickel-based superalloys is high up to 200-300 J/mm3. A combination of wheel speed 22.5 m/s, workpiece speed 0.1 m/min, depth of cut 0.2 mm accomplishes the straight grooves with the expected dimensional accuracy. Moreover, the compressive residual stresses are formed in the burn-free and crack-free ground surface
SVDFormer: Complementing Point Cloud via Self-view Augmentation and Self-structure Dual-generator
In this paper, we propose a novel network, SVDFormer, to tackle two specific
challenges in point cloud completion: understanding faithful global shapes from
incomplete point clouds and generating high-accuracy local structures. Current
methods either perceive shape patterns using only 3D coordinates or import
extra images with well-calibrated intrinsic parameters to guide the geometry
estimation of the missing parts. However, these approaches do not always fully
leverage the cross-modal self-structures available for accurate and
high-quality point cloud completion. To this end, we first design a Self-view
Fusion Network that leverages multiple-view depth image information to observe
incomplete self-shape and generate a compact global shape. To reveal highly
detailed structures, we then introduce a refinement module, called
Self-structure Dual-generator, in which we incorporate learned shape priors and
geometric self-similarities for producing new points. By perceiving the
incompleteness of each point, the dual-path design disentangles refinement
strategies conditioned on the structural type of each point. SVDFormer absorbs
the wisdom of self-structures, avoiding any additional paired information such
as color images with precisely calibrated camera intrinsic parameters.
Comprehensive experiments indicate that our method achieves state-of-the-art
performance on widely-used benchmarks. Code will be available at
https://github.com/czvvd/SVDFormer.Comment: Accepted by ICCV 202
GeoSegNet: Point Cloud Semantic Segmentation via Geometric Encoder-Decoder Modeling
Semantic segmentation of point clouds, aiming to assign each point a semantic
category, is critical to 3D scene understanding.Despite of significant advances
in recent years, most of existing methods still suffer from either the
object-level misclassification or the boundary-level ambiguity. In this paper,
we present a robust semantic segmentation network by deeply exploring the
geometry of point clouds, dubbed GeoSegNet. Our GeoSegNet consists of a
multi-geometry based encoder and a boundary-guided decoder. In the encoder, we
develop a new residual geometry module from multi-geometry perspectives to
extract object-level features. In the decoder, we introduce a contrastive
boundary learning module to enhance the geometric representation of boundary
points. Benefiting from the geometric encoder-decoder modeling, our GeoSegNet
can infer the segmentation of objects effectively while making the
intersections (boundaries) of two or more objects clear. Experiments show
obvious improvements of our method over its competitors in terms of the overall
segmentation accuracy and object boundary clearness. Code is available at
https://github.com/Chen-yuiyui/GeoSegNet
High-frequency stimulation of nucleus accumbens changes in dopaminergic reward circuit
Deep brain stimulation (DBS) of the nucleus accumbens (NAc) is a potential remedial therapy for drug craving and relapse, but the mechanism is poorly understood. We investigated changes in neurotransmitter levels during high frequency stimulation (HFS) of the unilateral NAc on morphine-induced rats. Sixty adult Wistar rats were randomized into five groups: the control group (administration of saline), the morphine-only group (systematic administration of morphine without electrode implantation), the morphine-sham-stimulation group (systematic administration of morphine with electrode implantation but not given stimulation), the morphine-stimulation group (systematic administration of morphine with electrode implantation and stimulation) and the saline-stimulation group (administration of saline with electrode implantation and stimulation). The stimulation electrode was stereotaxically implanted into the core of unilateral NAc and microdialysis probes were unilaterally lowered into the ipsilateral ventral tegmental area (VTA), NAc, and ventral pallidum (VP). Samples from microdialysis probes in the ipsilateral VTA, NAc, and VP were analyzed for glutamate (Glu) and caminobutyric acid (GABA) by high-performance liquid chromatography (HPLC). The levels of Glu were increased in the ipsilateral NAc and VP of morphine-only group versus control group, whereas Glu levels were not significantly changed in the ipsilateral VTA. Furthermore, the levels of GABA decreased significantly in the ipsilateral NAc, VP, and VTA of morphineonly group when compared with control group. The profiles of increased Glu and reduced GABA in morphine-induced rats suggest that the presence of increased excitatory neurotransmission in these brain regions. The concentrations of the Glu significantly decreased while the levels of GABA increased in ipsilateral VTA, NAc, and VP in the morphine-stimulation group compared with the morphine-only group. No significant changes were seen in the morphine-sham stimulation group compared with the morphine-only group. These findings indicated that unilateral NAc stimulation inhibits the morphineinduced rats associated hyperactivation of excitatory neurotransmission in the mesocorticolimbic reward circuit
Semi-MoreGAN: A New Semi-supervised Generative Adversarial Network for Mixture of Rain Removal
Rain is one of the most common weather which can completely degrade the image
quality and interfere with the performance of many computer vision tasks,
especially under heavy rain conditions. We observe that: (i) rain is a mixture
of rain streaks and rainy haze; (ii) the scene depth determines the intensity
of rain streaks and the transformation into the rainy haze; (iii) most existing
deraining methods are only trained on synthetic rainy images, and hence
generalize poorly to the real-world scenes. Motivated by these observations, we
propose a new SEMI-supervised Mixture Of rain REmoval Generative Adversarial
Network (Semi-MoreGAN), which consists of four key modules: (I) a novel
attentional depth prediction network to provide precise depth estimation; (ii)
a context feature prediction network composed of several well-designed detailed
residual blocks to produce detailed image context features; (iii) a pyramid
depth-guided non-local network to effectively integrate the image context with
the depth information, and produce the final rain-free images; and (iv) a
comprehensive semi-supervised loss function to make the model not limited to
synthetic datasets but generalize smoothly to real-world heavy rainy scenes.
Extensive experiments show clear improvements of our approach over twenty
representative state-of-the-arts on both synthetic and real-world rainy images.Comment: 18 page
Dynamical Analysis of DTNN with Impulsive Effect
We present dynamical analysis of discrete-time delayed neural networks with impulsive effect. Under impulsive effect, we derive some new criteria for the invariance and attractivity of discretetime neural networks by using decomposition approach and delay difference inequalities. Our results improve or extend the existing ones
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