scholarly journals A large rectangle delays the perception of a separate small rectangle

1990 ◽  
Vol 47 (4) ◽  
pp. 369-378 ◽  
Author(s):  
Donald L. King
Keyword(s):  
Small Rectangle ◽  
Large Rectangle

Structure Analysis of Large Rectangle Aqueduct during Construction and Operation Periods

2011 ◽  
Vol 255-260 ◽  
pp. 1163-1166
Author(s):  
Xin Li Bai ◽  
Dan Fei Wang ◽  
Yuan Yuan Fan ◽  
Wei Yu
Keyword(s):  
Stress Concentration ◽  
Structure Analysis ◽  
Local Stress ◽  
Simulation Method ◽  
Seismic Load ◽  
Load Case ◽  
Concrete Material ◽  
Load Combination ◽  
Large Rectangle ◽  
Control Load

Using large structure analysis software, the stress and displacement are calculated for Shuangji River rectangle aqueduct structure during construction and operation periods. The 19 different load combination cases are considered. The variation rule of mechanics behavior is obtained for concrete material during different load combination period. The simulation results show that the conventional method simulating prestress can lead to stress concentration in the point the force is acted on. It is a relatively good simulation method to add a steel plate to the area where the prestressed strands are acted on. In this way, the local stress concentration can be reduced. When use pseudo-static method for calculation of the seismic load, the load case considering the seismic load is a control load case. The Shuangji River aqueduct can meet the requirement of intensity and rigidity during construction and operation periods.

scholarly journals Skeleton-based 3D Surface Parameterization Applied on Texture Mapping

2012 ◽  
Vol 8 (2) ◽  
pp. 5-19 ◽  
Author(s):  
Martin Madaras ◽  
Roman Ďurikovič
Keyword(s):  
Surface Properties ◽  
Texture Mapping ◽  
Model Data ◽  
Surrounding Area ◽  
Surface Parameterization ◽  
Small Rectangle ◽  
3D Surface ◽  
Global Mapping ◽  
Loading Problem

Abstract Assume a 2D manifold surface topologically equivalent to a sphere with handles we propose a novel 3D surface parametrization along the surface skeleton. First, we use a global mapping of the surface vertices onto a computed skeleton. Second, we use local mapping of the surrounding area of each skeleton segment into a small rectangle whose size is derived based on the surface properties around the segment. Each rectangle can be textured by assigning the local u;v texture coordinates. Furthermore, these rectangles are packed into a large squared texture called skeleton texture map (STM) by approximately solving a palette loading problem. Our technique enables the mapping of a texture onto the surface without necessity to store texture coordinates together with the model data. In other words it is enough to store the geometry data with STM and the coordinates are calculated on the fly.

scholarly journals Broadband Dual-Polarized Multidipole Antenna for Base Station Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yuxuan Huang ◽  
Zeqi Zhu ◽  
Shuting Cai ◽  
Xiaoming Xiong ◽  
Yuan Liu
Keyword(s):  
Radiation Pattern ◽  
Base Station ◽  
Impedance Bandwidth ◽  
Frequency Bandwidth ◽  
Frequency Range ◽  
High Isolation ◽  
Small Rectangle ◽  
Additional Resonance ◽  
Dual Polarized ◽  
Better Than

A wideband dual-polarized multidipole antenna for base station applications is proposed. It consists of a pair of large square-shaped loop dipoles and a pair of small rectangle loop dipoles as radiation elements. A pair of small rectangle loop dipoles is fed by T-shaped feed structure which is in the large square-shaped loop dipoles radiating arm so that the antenna generates an additional resonance and obtains a wider bandwidth. The proposed antenna was fabricated and measured, and the results show that the antenna achieves a wide impedance bandwidth of 63.7 % with VSWR<1.5 covering the frequency range from 1.55 to 3 GHz. A high isolation is better than 29 dB within the operating frequency bandwidth. Moreover, an average gain 8 dBi and a stable radiation pattern with 3 dB beamwidth of 69° ± 4° at H-plane are obtained.

scholarly journals Multidisciplinary design optimization of large rectangle collimating mirror lightweight structure

2019 ◽  
Vol 40 (1) ◽  
pp. 41-45
Author(s):  
XU Mingming ◽  
HU Zhongwen ◽  
JI Hangxin ◽  
WANG Lei ◽  
HOU Yonghui ◽  
...  
Keyword(s):  
Design Optimization ◽  
Multidisciplinary Design Optimization ◽  
Multidisciplinary Design ◽  
Large Rectangle ◽  
Lightweight Structure

Configuration Saliency Revealed by Dichoptic Masking

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 95-95
Author(s):  
Y Bonneh ◽  
D Sagi
Keyword(s):  
Correct Response ◽  
Receptive Fields ◽  
Detection Performance ◽  
The Other ◽  
Spatial Integration ◽  
Probe Detection ◽  
Small Rectangle ◽  
Integration Mechanism ◽  
Spatial Configurations ◽  
Visual Filtering

We studied suprathreshold spatial integration by testing the saliency of multi Gabor element configurations in dichoptic masking conditions. Dichoptic presentations allows for a competition between spatially overlapping suprathreshold stimuli that involve nonoverlapping receptive fields in the first stage of visual filtering. Different spatial configurations of Gabor patches (sigma=lambda=0.12 deg) were presented to one eye (target) together with a bandpass noise presented to the other eye (mask). After a short rivalry period (128 ms) in which a dominance of one eye was established, a probe (a randomly positioned small rectangle of reduced contrast in the target) was presented for an additional detection period (80 ms). Probe detection performance was measured (2AFC) by finding the mask contrast leading to 75% correct response. We find that textures of randomly oriented patches are more dominant than uniform textures where the effect decreases and even reverses with decreasing of contrast. For suprathreshold (1-D) contours, however, we find that smooth collinear contours are more dominant than ‘jagged’ ones, regardless of contrast. These findings suggest principles underlying an early lateral integration mechanism based on contrast-dependent inhibitory and excitatory connections. This mechanism could be based on iso-orientation surround (2-D) inhibition and collinear (1-D) facilitation, with inhibition being more effective at high contrasts.

scholarly journals New water mites of Torrenticolidae (Acari, Hydrachnidia) from Jiangxi Province, P. R. China

Acarologia ◽  
2020 ◽  
Vol 60 (2) ◽  
pp. 488-500
Author(s):  
Xinyao Gu ◽  
Daochao Jin ◽  
Jianjun Guo
Keyword(s):  
Jiangxi Province ◽  
Water Mites ◽  
Small Rectangle

Three torrenticolid species new to science, i.e. Monatractides trilaminatus sp. nov., Torrenticola lushanensis sp. nov., and T. planusirostrum sp. nov. are described from Jiangxi Province, P. R. China. M. trilaminatus sp. nov. can be distinguished by the shoulder and frontal platelets fused together and formed into a pair of platelets; infracapitular bay U-shaped, extremely deep and narrow; the tip of coxae I with a small rectangle extension. T. lushanensis sp. nov. can be distinguished by epimeroglandularia 4 at the same level as the 4th pair of acetabula; anal pore on the same line with ventroglandularia 2, and posterior to ventroglandularia 1. T. planusirostrum sp. nov. can be distinguished by infracapitular dorsal apodeme almost absent, ventral apodeme blunt and long, rostrum flat and parallel to the ventral apodeme. Detailed descriptions and illustrations of these species are given in this paper.

Dextrostix and azostix

1968 ◽  
Vol 6 (25) ◽  
pp. 97-99
Keyword(s):  
Blood Glucose ◽  
Test Strip ◽  
Semipermeable Membrane ◽  
Rapid Estimation ◽  
Small Rectangle

Dextrostix and Azostix strips (Ames) are intended for the rapid estimation of blood glucose and urea respectively. Each test strip consists of a small rectangle of absorbent paper impregnated with reagents, covered by a semipermeable membrane and attached to a handle. Dextrostix strips were introduced in 1964 and many reports on their performance and practical value exist. Less information is available on Azostix strips which were marketed in October 1967.

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