Study on the Effect of Resistance Sliding Key Chamber Blasting Construction of a Hydropower Station on Adjacent Buildings

2012 ◽  
Vol 594-597 ◽  
pp. 2773-2776
Author(s):  
Hua Feng Deng ◽  
Qian Luo ◽  
Xian Fan Yuan ◽  
Min Zhu

In order to monitor and control the effect of blasting vibration on dam body, spillway overflow surface and mechanical and electrical equipment foundation at the excavation of resistance sliding key chamber, the fixed monitoring point scheme was used to monitor vibration speed of each point. According to the construction progress, a total of 44 times blasting vibration test were carried on, and data are integrity, which can accurately reflect the effect of resistance sliding key chamber excavation blasting on adjacent buildings. In blasting construction process, according to the analysis of monitoring data, the explosive dosage of single stage was adjusted, which effectively control the effect of blasting vibration. The results indicate that, in the process of resistance sliding key chamber blasting construction, particle vibration velocities of adjacent buildings such as dam body, spillway overflow surface, mechanical and electrical equipment foundation and etc. are in the velocity range of security vibration, which meets the requirements of design and specification, and real-time analysis of field monitoring guarantees the smooth completion of site construction.

1996 ◽  
Vol 448 ◽  
Author(s):  
D. E. Aspnes ◽  
N. Dietz ◽  
U. Rossow ◽  
K. J. Bachmann

AbstractVarious optical techniques have been developed over the last few years to allow real-time analysis of regions of importance for semiconductor epitaxy, in particular the unreacted and reacted parts of the surface reaction layer (SRL) and the near-surface region of the sample. When coupled with emerging microscopic methods of calculating optical properties, these approaches will allow several levels of control beyond that which has been currently demonstrated.


2013 ◽  
Vol 27 (05) ◽  
pp. 1350006 ◽  
Author(s):  
MING YANG ◽  
QING YANG ◽  
WEN-XIA SIMA ◽  
TAO YUAN ◽  
LI-JUN CHEN ◽  
...  

Ferroresonance overvoltage and over-current can be restrained using nonlinear dynamics. However, the ferroresonance simplified model, which cannot reflect the huge ferroresonance circuit in the grid precisely and cannot satisfy real-time analysis, is adopted in the traditional nonlinear control method. Owing to these shortcomings, the strategy of controlling ferroresonance overvoltage based on voltage time series is proposed. Based on the voltage time series analysis methods, the ferroresonance system is identified using the best embedding dimension and the best time delay obtained from the phase space reconstruction. Afterward, the feedback controller is designed based on the platform of the identified model. Results show that fundamental, subharmonic and chaotic ferroresonance overvoltage can all be controlled using the method presented in this paper even without the system parameters and the accurate system model. Therefore, the control strategy is generally more applicable.


2018 ◽  
Vol 7 (2.21) ◽  
pp. 166 ◽  
Author(s):  
S Indulal ◽  
S Ushakumari ◽  
P S. Chandramohanan Nair

Most of the means of transportation is based on Internal Combustion engines, since they are fast and furious means of transportation. But bicycles are also relevant nowadays since they are the ideal means of the short commutation and which also helps in improving the human health by serving as a work out machine. But in our busy life bicycles are not preferred due to the uneven terrains. Electric bikes are the solution for this issue. Pedal assist sensor (PAS) based hybrid bicycle are also available, which will intermittently turn on and control the speed of electric drive based on the pedal crank speed. Thus there the electric drive assistance will be provided based on the speed of the pedal cranking. The real assistance should be provided when our torque requirement is needed. This paper deal with a novel sensor which sends the effort required at the pedal by the rider and intelligently control the electric drive so as to meet the required torque. The advantage of this controller is that the rider need to give only the same effort at the pedal irrespective of the terrain variations for a constant speed ride. A Fuzzy Logic Controller (FLC) is proposed here. The performance of the controller is simulated and analysed with the experimental results to prove the efficacy of the proposed technique.


2011 ◽  
Vol 2-3 ◽  
pp. 423-426
Author(s):  
Chun Sheng Li ◽  
Hai Bin Zhao ◽  
Hong Wang

The wireless control method is implemented between NEU BCI-II brain-computer interface and DR05 humanoid hand in this paper. A user interface with a set of real-time analysis and control methods is developed based on Lab VIEW platform. Wavelet analysis method is embedded in this framework, which extracts the character of alpha rhythm. 86.7% correct rate is achieved by using this framework to make humanoid hand do six gestures. Electronic disturbance of finger motor is eliminated by adopting wireless method.


Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.


2020 ◽  
Vol 67 (4) ◽  
pp. 1197-1205 ◽  
Author(s):  
Yuki Totani ◽  
Susumu Kotani ◽  
Kei Odai ◽  
Etsuro Ito ◽  
Manabu Sakakibara

Sign in / Sign up

Export Citation Format

Share Document