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When transmitting BPSK modulated signal, GPS simulator can be used to calibrate hardware delay under a wide variety of conditions by determine the average measured time difference between the one pulse-per-second (1 pps) reference and the bi-phase modulated code transition point. In practice, an AM (Amplitude Modulation) phenomenon rather than ideal BPSK modulation code transition point can be observed...
A monitoring system based on the nRF24L01 chip is designed, aiming to meet the needs of acquiring, recording, displaying and 3D dynamic simulating of flight data in miniature unmanned helicopter flight experiments. In condition of hardware and software were modular in design, the system reached the goals of low cost, scalable functionality, high reliability, and excellent performance and high accuracy...
In order to solve the negative impact on the stability and control quality of the system which is caused by proportional solenoid valve flow hysteresis nonlinear, a nonlinear hysteresis mathematical model of the proportional solenoid valve was established for the needs of the nonlinear control in this paper. Aiming at the problems of the mechanism modeling and Preisach mathematics model modeling,...
The present work shows the implementation of an economic system in order to measure the solar radiation with the intention of quantify the amount solar energy received in this particular area. In order to accomplish that objective it was developed a data acquisition system based on a pyranometer, data acquisition board and a computer to record and display the data. Measurements obtained allowed the...
For the huge amount of the logical path, the path coverage technology of statement level can't be realized. On the premise that each function has finished the unit testing, the path coverage algorithm Based on the function calling relationship can guarantee the adequacy of the test. Get the dynamic path by running the instrumented source code, then split the dynamic path using the splitting algorithm...
Timing sequence test is a core part for missile ground testing, the results directly determine whether the missile can be well launched. A specialized CPCI timing sequence testing system for missile is presented in this paper, which is able to complete the sequence test of tail boot, gesture controller, sequence circuit, instant flight for both equivalent device and actual missile. Also, the design...
Solar energy production via photovoltaic (PV) cells has witnessed over 500% growth in cumulative installed capacity between 2006–2010 [1]. With this significant investment, there is a financial need to maximize the system's power output, which can be achieved via a solar tracking system. The objective of this paper is to introduce a new, highly compact, integrated sensor consisting of 9 photo-diodes...
UAV onboard electronic detection equipment is composed of computer, measurement equipment, servo equipment, power-supplying equipment and airplane cable. In the process of eliminating electronic system faults, it's very difficult for the user to detect and diagnose the faults. So it's urgent to detect and diagnose the UAV onboard electronic equipment faults. The simulation test technology and virtual...
With the platform of industrial PC and VC++ software, this paper researches on how to use PCI-1240 motor control card to achieve the control of stepper motor by sending control signals to stepper motor controller. A control system to realize the accurate control of the motion of stepper motor is designed. It is proved that this method is accurate, reliable, easy to operate, and practical in industry.
Research and training in atmospheric lidar remote sensing requires highly versatile software environments for both experimentation and analysis. Experimentation and analysis may be conducted either directly on site at the location of the lidar equipment and/or institutional computer center or remotely from a distant location. The requirements for lidar software environments depend not only on type...
All along, the traditional comprehensive month report forms of the grid enterprise are mainly ac0hieved by artificial, so that there are numerous shortcomings, such as low work efficiency, labor costs higher and so on. In order to adapt to the modern grid enterprises, especially the smart grid construction requirements, the grid enterprises developed Comprehensive Statistics Analysis and Data Acquisition...
In order to improve the level of experimental teaching of resistance strain sensor in higher vocational college, an experiment platform based on NI-WSN is reconstructed. First, the theory of wireless sensor networks is introduced. Second, the basic principle of resistance strain sensor is introduced. Then, the system structure is introduced. The resistance strain sensors and computer are connected...
In this paper, the system structure and Features of wireless sensor networks are introduced, visual Instrument and its advantages are introduced. A Wireless Sensing System Teaching Platform is constructed. It is a good platform and testing tools for sensor signals of real-time data acquisition, analysis, processing. This experiment platform can be used not only as a teaching experiment instrument,...
N most concrete CT experiment, the detail information of damage and fracture process is achieved by non-real-time approach, and CT method is always regarded as a qualitative method. In our study, a quasi-real-time method is invented using our experiment instruments. Based on the experiment result, the average CT number is used to analyze the damage and fracture process of concrete specimen, and the...
For the development in the agricultural sector in Sri Lanka, it is a well accepted fact that technology should be introduced to the field of agriculture. Here Electronic Engineers can play a major role. As the first step of this process the multi-disciplinary module Agricultural Electronics was formed and introduced to the undergraduates of the specialized field Electronic and Telecommunication. The...
Microarray technology, as a revolutionary tool for biomedical research, has been widely used to analyze the gene expression level. Image segmentation is an important step of microarray technology. In this paper, we have presented an improved SVM method, which combined the SVM with the canny algorithm, the morphological algorithm and the fixed circle method, to obtain a better segmentation result....
This work presents QTrace, an open-source instrumentation extension API developed on top of QEMU. QTrace instruments unmodified applications and OS binaries for uni- and multi-processor systems, enabling custom, full-system instrumentation tools for the x86 guest architecture. Computer architects can use QTrace to study whole program execution including system-level code. This paper motivates the...
Liaw's attitude questionnaire towards computers and the World Wide Web (WWW), first published in 2002, has revealed good internal consistency but factorial problems over time. “Attitudes” can predict people's behavior in certain situations, although the relationship between attitude and behavior is complex and multidimensional. Having reliable and valid instruments to measure variables is an essential...
Resolving excessive power dissipation of modern computer systems has become a substantial challenge. However, few research projects have targeted on application power analysis or application-aware power management, which becomes a rising factor in energy efficient system design. In this paper, we describe and implement an application function (subroutine call) level profiler, Safari. It can be used...
Reproducibility of experiments is the pillar of a rigorous scientific approach. However, simulation-based experiments often fail to meet this fundamental requirement. In this paper, we first revisit the definition of reproducibility in the context of simulation. Then, we give a comprehensive review of issues that make this highly desirable feature so difficult to obtain. Given that experimental (in-silico)...
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