scholarly journals Research of Clock Pulse Interpolation Technology Based on Constant Acceleration Model

Author(s):  
Zhen-yu GAO ◽  
Jin-chun HU ◽  
Yu ZHU ◽  
Rong CHENG
2019 ◽  
Vol 64 (9) ◽  
pp. 1662-1674 ◽  
Author(s):  
Kaishi Zhang ◽  
Wenhai Jiao ◽  
Liang Wang ◽  
Zishen Li ◽  
Jianwen Li ◽  
...  

2021 ◽  
Author(s):  
Evangelos Paouris ◽  
Angelos Vourlidas ◽  
Athanasios Papaioannou ◽  
Anastasios Anastasiadis

<p>The estimation of the Coronal Mass Ejection (CME) arrival is an open issue in the field of Space Weather. Many models have been developed to predict Time-of-Arrival (ToA). In this work, we utilize an updated version of the Effective Acceleration Model (EAM) to calculate the ToA. The EAM predicts the ToA of the CME-driven shock and the sheath's average speed at 1 AU. The model assumes that the interaction between the ambient solar wind and the interplanetary CME (ICME) results in constant acceleration or deceleration. We recently compared EAM against ENLIL and drag based models (DBEM) with a sample of 16 CMEs. We confirmed the well-known fact that the deceleration of fast ICMEs in the interplanetary medium is not captured by most models. We study further the deceleration of fast ICMEs by introducing, for the first time, wide-angle observations by the STEREO heliospheric imagers into the EAM model. The speed profiles for some test cases show deceleration in the interplanetary medium at greater distances compared with the field-of-view of the coronagraphs.</p>


2010 ◽  
Vol 108-111 ◽  
pp. 1152-1157
Author(s):  
Ming Lu ◽  
Liu Peng ◽  
Ling Li ◽  
Xin Wei Ji

Constant variably acceleration motion model of flying plate is proposed and the model formula about the relationship between speed of flying plate and clearance is put forward, which provides theorotical basis for choosing optimum clearance by collision speed of different metallic materials in explosive welding industry production. High pressure impulse X radial photograph experiment was carried out, the photos of the flying stances of flying plate in different clearances were obtained and the corresponding flying speeds of flying plate were calculated. Curve fitting of the experiment data through constant variably acceleration motion model was carried out. The results show that constant variably acceleration motion model accords well with the experiment data,and the maximum speed of flying plate calculated through constant acceleration model is in good agreement with the values through theoretical calculation. Therefore, it is concluded that the motion of flying plate in the main follows the constant variably acceleration motion.


2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
M N Silva ◽  
M A Maas ◽  
D A Barreto ◽  
M V P Costa ◽  
D S Vargas ◽  
...  

Abstract Background The Regional Internship (RI) is an extension project provided by the Federal University of Santa Maria (Brazil) that gives the medicine students a real experience of how the Primary Health Care (PHC) works, offering them a chance to grow as professionals, gaining self-trust and autonomy while being supervised by the preceptors. The cities where the program operates are small and they suffer with lack of high-quality healthcare professionals, which makes this internship also important for these communities. Worldwide, mainly in developing countries, the deficiency of proper PHC is a problem that can be attenuated by this proposal of introducing updated doctors eager to improve their skills and benefit the society. Objective The aim of the present study is to report, through the interns' exposition, how the internship was capable of contributing for the life and formation of the medicine student. Results Based on an extension project that gives the students an opportunity of a more embracing experience with the community, it is possible to notice the importance of the extension on the curricular complementation. Moreover, with the interaction between students and community, the knowledge exchange and the experience with different cultures benefit and contribute to the medical formation of these students, as well as in the population health context. Conclusions This is a part of the portfolio delivered by an academic: 'At the end of the two months of Regional Internship I have the sensation of mission accomplished and satisfaction. The experience offered by this phase of the course is incomparable, I feel more secure, more autonomous, it's like the growth that was in a constant acceleration before now suffered an exponential improve.' Key messages The benefits of Regional Internship cannot be evaluated only by quantitative indicators, but also by the individual experiences lived by interns, preceptors and a general community. After the internship period, academics conclude that they feel more confident and encouraged to face the challenges of medical life.


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