Design of Integrative Testing System for Enclosures in Fuel System of Airplanes

2015 ◽  
Vol 719-720 ◽  
pp. 258-261
Author(s):  
Xiao Gang Li ◽  
Zhou Zhou ◽  
Ke Qiang Cao ◽  
Chao Xia ◽  
Na Li
Keyword(s):  
Experimental Research ◽  
Performance Testing ◽  
Testing System ◽  
Performance Tests ◽  
Fuel System ◽  
And Performance

In order to start performance testing and experimental research for enclosure of airplanes’ fuel systems, a type of integrative testing system is designed in this paper. This system can accomplish function and performance tests for enclosures in airplanes’ fuel system, and also can execute troubleshooting experiments.

Performance Assessment in Language Testing

1995 ◽  
Vol 15 ◽  
pp. 188-211 ◽  
Author(s):  
Elana Shohamy
Keyword(s):  
Performance Assessment ◽  
Theory Development ◽  
Performance Testing ◽  
Language Testing ◽  
Performance Tests ◽  
The Past ◽  
Major Shift ◽  
And Performance

In the past two decades, there has been a major shift in language testing towards the development and use of performance tests. The basis for this shift is the expectation that such tests would assess a more valid construct of what it really means to know a language. The purpose of this chapter is to review th topic of performance testing by focusing on its definitions, theory, development, and research. The chapter will begin with a review of the different definitions of performance testing and provide examples of the types of performance tests that have been developed and used. The chapter will then examine the extent to which performance tests have drawn upon the theoretical discussions of competence and performance. The next section will describe the research that has been carried out on performance tests. The chapter will end with an agenda for development and research on the manyu unanswered questions concerning performance testing.

scholarly journals Performance Testing and Evaluation of Drum-Type Stem-Separation Device for Pepper Harvester

2021 ◽  
Vol 11 (19) ◽  
pp. 9225
Author(s):  
Seo-Yong Shin ◽  
Myoung-Ho Kim ◽  
Yongjin Cho ◽  
Dae-Cheol Kim
Keyword(s):  
Rotational Speed ◽  
Separation Efficiency ◽  
Performance Testing ◽  
Performance Tests ◽  
Separation Device ◽  
Damage Rate ◽  
Separation Capacity ◽  
And Performance ◽  
Separation Devices ◽  
Additional Labor

The chili pepper harvester has shown potential problems of low pepper stem separation and a high pepper damage rate. The low pepper stem separation has required additional labor, which consists of separating the pepper and stem after pepper harvesting. To improve the stem separation and sorting function of pepper harvesters, three-shaft and four-shaft drum-type stem-separation devices were manufactured, and performance tests were conducted to assess these devices. In an attempt to reduce the damage rate, a brush was used as the teeth in the drum-type stem-separation device. In the factor test, the rotational speeds of shaft 1(A), shaft 2(B), shaft 3(C), and the conveyor for the three-shaft drum were 0.9, 2.7, 1.3, and 0.5 m/s, respectively. The rotational speed of the four-shaft drum was the same as that of the three-shaft drum except for shaft 4(D), and the rotational speed of this additional D was set to 1.3 m/s, which was the same as that of C. In the non-moving status during the non-picking operation of the pepper harvester, the average stem-separation efficiency (SSE) of the four-shaft drum increased by 1.2%, the average pepper with twig rate (PTR) decreased by 5.9%, and the average damage rate (DR) increased by 3.7% compared to the three-shaft drum. In the moving status during the picking operation of the pepper harvester, the SSE of the four-shaft drum increased by 3.6%, the PTR decreased by 9.1%, and the DR increased by 3.8% compared to the three-shaft drum, so an improvement in the pepper stem-separation capacity was observed.

scholarly journals Development of the Architecture of the System of High-Load Testing

2021 ◽  
Vol 4 ◽  
pp. 88-92
Author(s):  
Lada Beniukh ◽  
Andrii Hlybovets
Keyword(s):  
Stress Testing ◽  
Performance Testing ◽  
High Load ◽  
Modern Architecture ◽  
Digital Systems ◽  
Testing System ◽  
Load Testing ◽  
Critical Problems ◽  
And Performance ◽  
Increasing Load

Testing system performance and its importance at the same time is difficult to overestimate or underestimate. It would be much more correct to talk about the timeliness of this activity. Virtually any digital sys- tem built on modern approaches and technologies can work without any critical problems with its own performance. At the same time, for any system, especially when it becomes popular, it is very likely that there will be a time when it will not be able to cope with the ever-increasing load and become unstable. However, most companies that develop and maintain their own digital solutions – from websites to any other digital systems – often focus primarily on the functionality of the system and its compliance, rather than on the performance of the system as a whole. Such intentions are quite natural, because the system must properly perform the functions expected of it. When companies start to face performance problems, they try not to optimize the software as soon as possible, but to add more capacity – vertical and horizontal scaling. This strategy works, but it has limitations. After all, the addition of additional resources cannot be endless and sooner or later rests either on the architecture of the system, or in the capabilities of the company itself, and so on.Therefore it is recommended to carry out stress testing in advance, plan time and resources to have enough time to correct errors, and generally understand the boundaries of the system. At the same time, in order to organize full-fledged stress testing, trained specialists, tools and infrastructure are needed, especially when we are talking about heavy workload.As part of this work, an analysis of various tools for the implementation of stress testing and performance testing, scaling of such tests and centralized reporting of metrics. As a result, approaches and principles for the construction of a modern architecture for the implementation of the load testing subsystem in the continuous supply of code were proposed.

Effects of Reheating Procedure and Oven Type on Performance Testing Results of Asphalt Mixtures

2018 ◽  
Vol 2672 (26) ◽  
pp. 124-133 ◽  
Author(s):  
Zachary Lemke ◽  
Husam Sadek ◽  
Daniel Swiertz ◽  
Signe Reichelt ◽  
Hussain U. Bahia
Keyword(s):  
Performance Testing ◽  
Substantial Effect ◽  
Asphalt Mixtures ◽  
Volumetric Properties ◽  
Performance Tests ◽  
Laboratory Equipment ◽  
Standard Procedures ◽  
And Performance ◽  
Time Required ◽  
Wheel Tracking

Reheating and oven-aging procedures of plant-produced asphalt mixtures in laboratories are important topics to consider as performance testing of mixtures becomes more popular among agencies. Differences between laboratory equipment and procedure could significantly affect performance properties. The objective of this study is to investigate the influence of sample size, oven type, and variation in reheating/aging temperatures on the results of two performance tests on plant-produced mixtures. A selected mixture was tested for volumetric properties and performance using Hamburg wheel-tracking (HWT) and semi-circular bending (SCB-IFIT) tests. Results show that reheating mixtures uncovered and in smaller containers could significantly reduce the time to achieve aging temperature, and could make the process more efficient and consistent. In addition, aging using three different oven types showed that temperature within ovens can vary significantly depending on the location of the sample inside the oven, which affects the time required to reach the target temperature, and thus may also influence the aging of the sample. The mixture volumetric properties show that the effect of various heating conditions is marginal. Using the developed reheating/aging procedure of this study, the results of the HWT and SCB-IFIT tests showed no substantial effect of oven type on rutting and cracking resistance. The overall results indicate that there is a need to standardize the conditions of reheating, sample geometry, and to verify uniformity of temperature in ovens. Such standardization can further reduce variability and thus should be part of the AASHTO/ASTM standard procedures for quality control, or of laboratory equipment calibration procedures.

scholarly journals Design, Fabrication, and Performance Analysis of an Automatic Horizontal Egg Incubator

2021 ◽  
Vol 16 (1) ◽  
pp. 77-85
Author(s):  
Bharosh Kumar Yadav ◽  
Nischal Pokhrel ◽  
Dinesh Khatiwada ◽  
Madan Khanal ◽  
Triratna Bajracharya ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Relative Humidity ◽  
Experimental Research ◽  
Experimental Test ◽  
Performance Testing ◽  
Specific Design ◽  
Test Analysis ◽  
And Performance ◽  
Favorable Temperature ◽  
Design Construction

This research paper presents the design, construction, and performance testing of an automatic electrically powered egg incubator utilizing the horizontal placement of eggs. This experimental research was driven by the specific design and construction of a well-insulated rectangular egg-incubating box of dimension 400 mm × 600 mm × 500 mm and thickness 30 mm, where sample eggs were kept for experimental test analysis under the favorable temperature and humidity inside the box, which was automatically controlled. The device was made to operate under the temperature range of 37°C – 38°C, which was found to be adequate for developing embryos and also maintaining relative humidity at the range of 45–60% for the first 18 days and 60–90% for the last three days. Finally, in this machine, the egg tray was adjusted horizontally, and a motor clamped mechanism was used 5 times a day which was controlled automatically by a micro-controller for the motion of eggs up to 18 days of incubation. In conclusion, this egg-incubating machine has an efficiency and hatchability of 72.22%.

Digitalization system of ancient architecture decoration art based on neural network and image features

2020 ◽  
pp. 1-12
Author(s):  
Wu Xin ◽  
Qiu Daping
Keyword(s):  
Neural Network ◽  
Construction Industry ◽  
Three Dimensional ◽  
Performance Testing ◽  
Image Features ◽  
Three Dimensional Model ◽  
Performance Effect ◽  
Data Process ◽  
And Performance ◽  
Construction Mode

The inheritance and innovation of ancient architecture decoration art is an important way for the development of the construction industry. The data process of traditional ancient architecture decoration art is relatively backward, which leads to the obvious distortion of the digitalization of ancient architecture decoration art. In order to improve the digital effect of ancient architecture decoration art, based on neural network, this paper combines the image features to construct a neural network-based ancient architecture decoration art data system model, and graphically expresses the static construction mode and dynamic construction process of the architecture group. Based on this, three-dimensional model reconstruction and scene simulation experiments of architecture groups are realized. In order to verify the performance effect of the system proposed in this paper, it is verified through simulation and performance testing, and data visualization is performed through statistical methods. The result of the study shows that the digitalization effect of the ancient architecture decoration art proposed in this paper is good.

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