Papers by Keyword: Transmission Performance

Abstract: The nanoboron carbide particle size is 60nm, dispersed in RO reverse osmosis membrane treatment water form water-based nanofluid by adding the dispersant. In experiment, Water-based nanoboron carbide fluid has good resistance sedimentation stability when adding sodium carboxymethyl cellulose as a dispersing agent. Prepared three kinds of water-based nanoboron carbide fluid, the mass fraction of nanoparticles is 0.6%, 0.8%, 1.0%. By establishing a model of U-shaped tube, simulated the water-based nanofluids flow field in U-shaped tube using FLUENT, get velocity flow lines picture and pressure variation graph by CFD post-processing. From simulation results obtained: Water-based nanoboron carbide has good transmission fluid performance when nanoparticles mass fraction of 0.8%.

Abstract: In this paper, we conduct research on the impact of multi-threading strategy on performance of end-to-end file transmission. As we all know, adopting multi-threading strategy in file transmission can greatly improve performance. However, the degree of such performance gains is not well documented. We first analyze the merits of file transmission utilizing multi-threaded transmission method. Then, to demonstrate the performance gains of multi-threaded transmission, an architecture which supports multi-threading transmission both in client side and server side is designed. We utilize the architecture in a real network and compare transmission performance by utilizing different parameters. Test results shows that multi-threading transmission achieves a better performance when compared to single-thread transmission. However, the performance gains are not proportional to the number of threads. Since file transmission is very normal in our daily life, it is expected the results in this paper will provide a guide for software vendor when multi-threading tools are developed.

Abstract: Nowadays, in order to improve the quality of signal transmission and reduce the signal attenuation and noise interference, the transmission digital baseband signal modulation become mainstream in today's signal transmission. For the digital baseband signal transmission performance of research helps us to understand the process of digital signal transmission. Firstly, using shift registers to produce m sequence, used to simulate the data signal and the pseudo random noise signal. Then, to design a low pass filter, used to simulate the channel. Data signal transmission in the channel was carried with additive random noise interference, we can measure signal interference by observing eye pattern at the receiving terminal. If to Manchester encoding of data signal, the receiver decoding output data signal can be extracted using the synchronous clock circuit to get the clock signal to synchronize, and display the eye pattern, which is used to evaluate the performance of the transmission system. And we put forward the optimization scheme of the digital baseband signal transmission performance through the research.

Abstract: To meet the needs of test for compound oscillatory roller transmission (CORT) reducer, A comprehensive test system for precision transmission performance was designed, the test-bed structure and control principal of which were introduced. First, a transmission performance test method was proposed and focused on the transmission performance of velocity ratio, accuracy, and efficiency. Then, user interface based on LabVIEW program was designed, and the transmission performance of torque, angle, velocity, velocity ratio, return difference, efficiency could be displayed. Finally, measurement example on an E80 type CORT reducer has been made, and shows that the proposed test system is suitable for test for these reducers of high-precision drive, high stiffness, high load characteristics.

Abstract: The traction infinitely variable transmission (TIVT) used in the power train of electric vehicles (EVS) was designed. Firstly, based on the analysis of basic structure and working principle, the mathematic models were established on the transmission ratio, slipping ratio, transferring torsion and transmission efficiency; Secondly, Transmission characteristics of the TIVT were analyzed and calculated using ADAMS software. The calculation results show that: the export torsion varies with sway angle of steer ring as the import torsion is fixed. The transmission efficiency of TIVT is large when the motion of driving parts is pure-rolling or the slipping ratio is less. The efficiency could be reached more than 99% by rational designing. Theoretically, the driving distance of EVS matched with TIVT could be increased.

Abstract: For the phenomenon that the transmission performance of primary-type drive in low drive ratio planar double enveloping worm pair is bad,we put forward a modified way to planar double enveloping worm pair ,which is base on the curvity modification principle of enveloped toroidal worm. The results show that if the modified parameter to conform to the curvity modification principle of enveloped toroidal worm,it will get a good modified result and the transmission performance was improved.

Abstract: Nowadays, IC manufacturing meet the challenges of physical limits, through silicon via(TSV) technology has increasingly become the focus of the microelectronics industry due to its shorter wiring route, better signal integrity, larger bandwidth, lower power consumption and smaller packaging size. In this paper, the transmission performance of TSV was analyzed and the impact of ground vias number, diameter and pitch with TSV on TSV transmission performance. A design of experiment (DOE) was established to investigate the impact of different ground vias parameter combinations on the transmission of TSV and the range analysis of the experiment results was executed. Based on the DOE, two regression equations were formed to estimate the electrical performances of TSV. From the two equations, the structure parameters were optimized, the S11 and S21 results of optimization parameter combination reduced 0.4dB and 0.15dB, respectively.

Abstract: Transmission performances of some squirrel cage magnetic couplings, which were different in magnet pole number, slot number, slot depth or slot area, were tested. Experimental results and analysis indicate that these parameters (magnet pole number, slot number, slot depth and slot area) all affect transmission performance of a squirrel cage magnetic coupling. In these factors, deep slot can not only increase slot area to improve a squirrel cage magnetic coupling’s transmission performance, but also can make skin effect on conducting bars more obvious to further improve the transmission performance. Therefore, slot depth affects transmission performance of a squirrel cage magnetic coupling greatly. The experimental results show that a deep slot squirrel cage magnetic coupling’s transmission performance is much better than a common one.