Design and performance of a novel automatic fiber line testing system with OTDR for optical subscriber loops

1994 ◽  
Vol 12 (5) ◽  
pp. 717-726 ◽  
Author(s):  
N. Tomita ◽  
H. Takasugi ◽  
N. Atobe ◽  
I. Nakamura ◽  
F. Takaesu ◽  
...  
2021 ◽  
pp. 1-11
Author(s):  
Liu Narengerile ◽  
Li Di ◽  

At present, the college English testing system has become an indispensable system in many universities. However, the English test system is not highly humanized due to problems such as unreasonable framework structure. This paper combines data mining technology to build a college English test framework. The college English test system software based on data mining mainly realizes the computer program to automatically generate test papers, set the test time to automatically judge the test takers’ test results, and give out results on the spot. The test takers log in to complete the test through the test system software. The examination system software solves the functions of printing test papers, arranging invigilation classrooms, invigilating teachers, invigilating process, collecting test papers, scoring and analyzing test papers in traditional examinations. Finally, this paper analyzes the performance of this paper through experimental research. The research results show that the system constructed in this paper has certain practical effects.


2012 ◽  
Vol 268-270 ◽  
pp. 1637-1643
Author(s):  
Xiao Xia Song ◽  
Zheng Yan Xu

Nowadays people’s requirement about garment comfort is improved. Pressure comfort has been an important part of garment comfort. The structure and performance of knitting fabrics are changed after they are made into clothes with different pressure. The measurement of garment pressure is difficult, but the measurement of fabric performance is easier. So the relationship between fabric performance and pressure comfort is studied in this paper. 8 kinds of knitting fabrics are selected to measure mechanical performance of fabric, such as flexible performance, cut performance, bend performance, compress performance and interface performance. Fabric pressure simulation apparatus is used to simulate fabric pressure variation on elbow and knee. And the pressure is measured and recorded during the deformation of fabric. Same eight kinds of knitting fabrics are used to make basic-style knitwear. The pressure is measured by mannequin pressure testing system


2014 ◽  
Vol 608-609 ◽  
pp. 66-70
Author(s):  
Jun Wang

Through the ship flow field of centrifugal pump that can be numerical simulation of three-dimensional turbulent, the paper reveals the pump flow pressure and velocity distribution. It also introduces the function of hardware and module testing system, according to the centrifugal pump performance test data, to achieve the minimum two multiplication curve fitting module using VC programming, curve fitting for the transformed data, the results show that the system is running stable, and convenient operation in the test process, simple maintenance and high reliability.


2013 ◽  
Vol 421 ◽  
pp. 479-485
Author(s):  
Shang Kun Ren ◽  
Wei Fan ◽  
Bing Li

The Alternating Current Field Measurement (ACFM) technique is an electromagnetic inspection method for surface crack detection and sizing. According to signal characteristics of ACFM, a detecting instrument has been designed and fabricated successfully. The ACFM inspection system is composed of signal conditioning circuit and testing system based on DSP and LABVIEW. The functions of generating exciting signal, collecting data, processing data and sending data are realized through DSP, while the functions of displaying data, storing data and calculating are achieved through the LABVIEW software. The function and performance of the instrument has been tested by experiments. It can calculate the length and depth of the crack and can facilitate the quantitative evaluation of crack as well. Its detection accuracy and performance can completely meet the requirement of practical test.


2021 ◽  
Vol 4 ◽  
pp. 88-92
Author(s):  
Lada Beniukh ◽  
Andrii Hlybovets

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.


Author(s):  
Enhedelihai Nilot ◽  
Xuan Feng ◽  
Cai Liu ◽  
Qi Lu ◽  
Wenjing Liang ◽  
...  

2008 ◽  
Vol 36 (6) ◽  
pp. 577-597 ◽  
Author(s):  
Sherry O. Farwell ◽  
Adrian Verwolf ◽  
Zhongtao Cai ◽  
Pauline Smith ◽  
Walter Roy

Author(s):  
Mansour Rahimi ◽  
Don E. Malzahn

Appropriate design and modification of industrial tasks must consider the matching of human physical abilities with task requirements. This paper describes the Available Motions Inventory (AMI) as a testing and evaluation system for measuring human physical ability based on components of manual industrial tasks. Using a microcomputer, one can transform the AMI scores (71 for each hand) into raw scores, ability scores, motion class scores, and performance prediction indices. Examples of task modification strategies using the design-oriented scoring of AMI are illustrated. Also, the reliability of the AMI testing system was evaluated using a multivariate canonical correlation analysis. A high test-retest reliability of 0.85 was obtained.


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