scholarly journals Bridging the testing speed gap: design for delay testability

2002 ◽  
Author(s):  
H. Speek ◽  
H.G. Kerkhoff ◽  
M. Sachdev ◽  
M. Shashaani
Keyword(s):  
Testing Speed

Standards for physical fitness of biathletes during the period of sport skills perfectionм

2019 ◽  
Vol 7 (4) ◽  
pp. 43-50
Author(s):  
Vladimir Mikhalev ◽  
Elena Reutskaya ◽  
Pavel Pinyagin
Keyword(s):  
Rotator Cuff ◽  
Physical Fitness ◽  
Research Methods ◽  
Confidence Intervals ◽  
Research Results ◽  
Educational Experiment ◽  
Weak Points ◽  
Sport Skills ◽  
One Year ◽  
Testing Speed

The purpose – perfection of the techniques for controlling speed-strength capabilities and endurance of the rotator cuff muscles of biathletes during the period of sport skills perfection. Research methods and organization. The study involved 204 biathletes aged 15-17. We tested the speed- strength abilities and endurance of rotator cuff muscles with the Skierg Concept2 ski ergometer (USA). Research results. Significant changes in the endurance of rotator cuff muscles of biathletes occur in the age period from 15 to 16 years. The change in speed-strength abilities of female biathletes, in contrast to male biathletes, occurs against the background of an increase in the number of ski pole movements per minute. We processed the obtained data using the method of determining the boundaries of confidence intervals. Based on the data processed, we developed the standards for assessment of the speed-strength abilities and strength endurance of rotator cuff muscles of biathletes during the period of sport skills perfection with the Skierg Concept2 ski ergometer (USA). We tested applicability of the developed standards for speed-strength abilities and strength endurance of rotator cuff muscles in a one-year educational experiment. Conclusion. We proposed a methodology for testing speed-strength abilities and strength endurance of rotator cuff muscles with the Skierg Concept2 ski ergometer (USA) in the framework of our study. The developed stand- ards for assessing speed-strength abilities and strength endurance of rotator cuff muscles of biathletes during the period of sport skills perfection help to identify strong and weak points of fitness and to predict the possibility of achieving certain results by individual parameters.

Real-Time Human Detection Based on the Improved Local Binary Pattern

2014 ◽  
Vol 1044-1045 ◽  
pp. 1246-1250
Author(s):  
Dong Mei Wu ◽  
Xing Ma ◽  
Jing Wang ◽  
Hao Zhang
Keyword(s):  
Real Time ◽  
Local Binary Pattern ◽  
Human Detection ◽  
Computational Method ◽  
Detection Accuracy ◽  
Real Time System ◽  
Feature Vectors ◽  
Linear Classifier ◽  
Detection Window ◽  
Testing Speed

By analyzing the detection accuracy and the testing speed of the Local Binary Pattern. we propose an improved LBP algorithm and apply it in human detection. Through the signs of the comparisons among neighboring pixels, it will get the histogram of the detection window. Then we can encode the global contour by the distribution coefficient of the histogram. when the Linear classifier is used, we propose a fast computational method that does not need to explicitly generate feature vectors and not require feature vectors normalization. experiment shows that this method has higher efficiency and can’t reduce the accuracy, it achieves 19 fps speed and can be used in a real-time system.

The Design of a New Network Cabling Experimental Instrument Based on Embedded System

2011 ◽  
Vol 328-330 ◽  
pp. 2427-2431 ◽  
Author(s):  
Wu Wen ◽  
De Hua He ◽  
Hua Feng ◽  
Peng Gu
Keyword(s):  
Embedded System ◽  
Data Storage ◽  
High Efficiency ◽  
Fast Response ◽  
Ease Of Use ◽  
Automatic Identification ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Learning Interest ◽  
Testing Speed

Structured Cabling is not a demonstrative course, but a course to stimulate students’ learning interest and to improve experiment’s efficiency. Unfortunately there are some disadvantages for experimental instruments on the present market, such as low testing speed, low automation level and less functions, etc. A multi-processor structure is proposed in this paper, which consists of a 32-bit ARM processor S3C2440 and a 8-bit Single Chip Microcomputer STC89LE54. This structure is used to develop a new network cabling experimental instrument, which is based on embedded system. The instrument can achieve precise processing, such as synchronous data acquisition for wire cores of 32 standard network lines according to EIA/TIA568A Standard or EIA/TIA568B Standard, display and data storage, etc. The instrument has characteristics of high efficiency, fast response, automatic identification, and ease of use. It is used to implement consistency between teaching and job training. Therefore it has high practical value.

Research on Sliding Layer of Cross-Tensioned Prestressed Concrete Pavement

2014 ◽  
Vol 1004-1005 ◽  
pp. 1486-1491
Author(s):  
De Chen ◽  
Sen Han ◽  
Cheng Ling ◽  
Dong Sheng Zhang ◽  
Fu Yang Guan
Keyword(s):  
Coefficient Of Friction ◽  
Prestressed Concrete ◽  
Concrete Pavement ◽  
Plastic Film ◽  
Analysis Method ◽  
Material Parameters ◽  
Friction Tester ◽  
Optimum Material ◽  
Stress And Deformation ◽  
Testing Speed

A coefficient of friction tester (CFT) for the cross-tensioned prestressed concrete pavement (CTCP) sliding layer was designed and developed basing on the Amonton law. The CFT can obtain precise values of the CTCP sliding layer coefficient of friction. Meanwhile, the sand and polyethylene plastic film (SPPF) sliding layer which has already been used in CTCP experimental road was tested using the CFT. The best testing speed (1mm/min) for CFT was obtained with applying regression analysis method to the results. The optimum material parameters for the SPPF are the combination of 2.6 fineness modulus of sand, 10mm thickness of sliding layer, and 3 μm thickness of polyethylene plastic film (PPF). The optimum materials combination of the SPPF provides minimum coefficient of friction to the CTCP sliding layer which can reduce the stress and deformation of the CTCP slab.

DESIGNING OF A TESTING MACHINE FOR SHEAR-MODE FATIGUE CRACK GROWTH

2012 ◽  
Vol 06 ◽  
pp. 318-323
Author(s):  
A. KUSABA ◽  
S. OKAZAKI ◽  
M. ENDO ◽  
K. YANASE
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
High Performance ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Shear Mode ◽  
Mode Iii ◽  
Research Activity ◽  
Testing Speed

As recognized, flaking-type failure is one of the serious problems for railroad tracks and bearings. In essence, flaking-type failure is closely related to the growth of the shear-mode (Mode-II and Mode-III) fatigue crack. In our research group, it is demonstrated that a shear-mode fatigue crack can be reproduced for cylindrical specimens by applying the cyclic torsion in the presence of the static axial compressive stress. However, a biaxial servo-hydraulic fatigue testing machine is quite expensive to purchase and costly to maintain. The low testing speed (about 10Hz) of the testing machine further aggravates the situation. As a result, study on shear-mode fatigue crack growth is still in the nascent stage. To overcome the difficulties mentioned above, in this research activity, we developed a high-performance and cost-effective testing machine to reproduce the shear-mode fatigue crack growth by improving the available resonance-type torsion fatigue testing machine. The primary advantage of using the resonance-type torsion fatigue testing machine is cost-efficiency. In addition, the testing speed effectively can be improved, in comparison with that of a biaxial servo-hydraulic fatigue testing machine. By utilizing the newly-designed testing machine, we have demonstrated that we can successfully reproduce the shear-mode fatigue crack.

A Collision Detection Algorithm Using AABB and Octree Space Division

2014 ◽  
Vol 989-994 ◽  
pp. 2389-2392 ◽  
Author(s):  
Huai Yu Wang ◽  
Shu Gui Liu
Keyword(s):  
Control System ◽  
Collision Detection ◽  
Detection System ◽  
Detection Algorithm ◽  
Program Control ◽  
Space Model ◽  
Space Division ◽  
Testing Speed

NC lathe controls the action of the lathe through program control system, while programming mistakes may lead to collisions between NC lathe cutters and workpieces or fixtures. A collision detection system judge whether there are collisions ahead of time by means of reading the information of shape and pose of objects in processing environment, building a space model using CSG and acquring the movement intension of objects. Dividing the modeling space into space nodes using octree, building AABBs of objects to be tested and locating them at certain space nodes, only objects at the same node or the same father node need to be tested, thus testing speed is raised.

scholarly journals THE IMPORTANCE OF USING CIRCUIT TRAINING IN THE DEVELOPMENT OF CONDITIONAL AND COORDINATIVE ABILITIES OF MALE U17 HANDBALL PLAYERS

2021 ◽  
Vol 66 (2) ◽  
pp. 103-116
Author(s):  
NARCIS CRISTEA-MIC ◽  
LIANA MARIA COSTEA
Keyword(s):  
Mathematical Method ◽  
Physical Training ◽  
Data Interpretation ◽  
Maximum Efficiency ◽  
Control Group ◽  
Specific Training ◽  
Circuit Training ◽  
Significant Difference ◽  
The Difference ◽  
Testing Speed

Introduction. The necessity of a proper physical training of athletes and their harmonious development of also implies making them accustomed with the practice of circuit training within handball specific training sessions. This ensures the mastery of a complex set of exercises and its methods of execution. Aims: We started from the premise that the chaining of several handball specific exercises within a training circuit can be beneficial for the development of conditional and coordinative abilities of the male U17 handball players. Methods: The method used was mainly the experimental one, speed testing in different directions was performed, with emphasis on execution, acceleration and force speed, as well as agility and general coordination. Data interpretation was performed by applying the statistical-mathematical method, the method of graphical representations. Results: The results show a statistically significant difference between mean results obtained by the subjects of the two groups in the "Training circuit 1" test for testing speed in different directions, with emphasis on execution, acceleration and force speed, as well as agility and general coordination, the average being 31.98 sec. for the experiment group and 34.48 sec. for the control group. As a result, the average of the experiment group is lower by 2.51 sec. (7.27%). Conclusions: The higher the motor skill indicators, the more the technical-tactical abilities of male U17 handball players will make the difference in achieving maximum efficiency.

The effect of sea-water on the tribological properties of polyurethanes

2019 ◽  
Vol 71 (7) ◽  
pp. 924-930 ◽  
Author(s):  
Yanbao Guo ◽  
Hai Tan ◽  
Deguo Wang ◽  
Siwei Zhang
Keyword(s):  
Surface Characterization ◽  
Sea Water ◽  
Hydrodynamic Lubrication ◽  
Polymeric Materials ◽  
Test Machine ◽  
Wear Performance ◽  
Content Type ◽  
Large Molecules ◽  
Specimen Test ◽  
Testing Speed

Purpose Ocean exploration is of importance and in great demand throughout the world. This results in a huge challenge in tribology in the marine environment. Moreover, polymeric materials with large molecules or macromolecules play an important role in marine equipment. Design/methodology/approach The tribological performance of sea-water-eroded polyether polyurethane (PU) was systematically studied by using a multi-specimen test machine for different durations from 0 to 60 days. Surface characterization technologies, such as scanning electric microscopy energy dispersive spectroscopy, were used to analyze the PU samples. Findings It can be found that the COF measured against 316 steel increases with the testing load because of the change of contact areas for the original PU samples. The effect of hydrodynamic lubrication and heat resulted in the decline of the COF with the increase in testing speed. The COF of PU sample immersed for 20 days was the lowest compared with other samples. With the immersion time increased to 60 days, the COF increased first and then decreased. The reduced COF of PU resulted in improved anti-wear performance of the PU sample. Originality/value These results enhanced the comprehension of the tribological performances of PU immersed in sea-water.

Effects of Testing Speed and Temperature on the Tensile and Fatigue Properties of Polyacetal

1974 ◽  
Vol 23 (252) ◽  
pp. 686-692
Author(s):  
Takao NAKAGAWA ◽  
Shinkichi SORANO ◽  
Chiaki HIWA
Keyword(s):  
Fatigue Properties ◽  
Testing Speed

Simulation and Numerical Analysis of Crashworthiness Behaviour of Thin Walled Structure

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
D. Yesuraj ◽  
M.S.P.P. Vallavaraayan ◽  
S. Selvaraj
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Energy Absorption ◽  
Steel Tube ◽  
Material Structure ◽  
Processing Conditions ◽  
Geometry Processing ◽  
Specific Energy Absorption ◽  
Thin Walled ◽  
Testing Speed

The purpose of this work is to find the specific energy absorption (SEA) of a steel tube using ABAQUS/CAE V6.10. Crashworthiness of a structure is characterised by the absorbed more amount of energy while the structure is subjected to an impact. A material structure should safeguard the occupants during an impact. The specimen geometry, processing conditions, and testing speed are the dependent parameters of energy absorption. It aims to determine the generalized mathematical model to evaluate the SEA and also find the parameter that is most likely affects SEA. Simulations are also carried out in ABAQUS/CAE to validate the developed numerical analysis.

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