scholarly journals RESEARCH AND FORMATION OF THE WHIRLING VORTEX OF THE JET PUMP / ČIURKŠLINIO SIURBLIO PULSUOJANČIO SPIRALINIO SŪKURIO

2012 ◽  
Vol 3 (6) ◽  
pp. 53-55
Author(s):  
Vladas Vekteris ◽  
Andrius Styra ◽  
Vytautas Striška
Keyword(s):  
Traffic Flow ◽  
Contact Surface ◽  
Venturi Tube ◽  
New Method ◽  
Jet Pump ◽  
Spiral Vortex ◽  
Solubility Of Oxygen

This article explores the formation of spiral vortex and application of liquid aerators. Visually, the new method has been applied for three structures of the stream ejector. The paper shows that under the same traffic flow, the venturi tube with blade cup liquid creates maximum ejected liquid contact surface. It has been noticed that the flared shape of the ejector blade that is close to the form of the spiral vortex, creates improvements in a pulsation flow and thus increases the solubility of oxygen in the liquid. Santrauka Straipsnyje tyrinėjamas spiralinio sūkurio formavimas ir taikymas skysčio aeratoriuose. Vizualiniu metodu išbandytos trys naujos srautinių čiurkšlinių siurblių konstrukcijos. Parodyta, kad čiurkšliniu siurbliu su menteliniu skysčio užsukimu, esant tam pačiam darbinio srauto debitui, sukuriamas didžiausias siurbiamo skysčio sąlyčio paviršius. Pastebėta, kad mentelinio čiurkšlinio siurblio fakelo forma artima spiralinio sūkurio formai, kuri sukuria srauto pulsacijas, pagerinančias deguonies tirpumą skystyje.

Tack of Pressure-Sensitive Tape

1957 ◽  
Vol 30 (3) ◽  
pp. 847-853 ◽  
Author(s):  
Franklin S. C. Chang
Keyword(s):  
Adhesion Strength ◽  
Contact Surface ◽  
Point Of View ◽  
New Method ◽  
Depression Effect ◽  
Paper Surface ◽  
Pressure Sensitive ◽  
The One ◽  
Limiting Value

Abstract A new method has been found, as a result of this investigation, for measuring the tack of pressure-sensitive tape, which is simple and precise enough for practical purposes. By using this method, tack testing yields reproducible quantitative records in lieu of the ambiguous descriptive results from the empirical finger test. In light of the fact that, of the tapes made with the same adhesive, the one with crepe paper gave lower tack than the one made of flat paper, surface of contact must be one of the factors determining tack. Any pressure applied on the tape after the tape is put on the testing panel would, to a certain extent, increase the contact surface, hence, the force required to peel the tape from the panel. The stiffness of paper, through the depression effect, would have the same effect on the peeling force, in this case, the adhesion strength. Since tack is defined to be free of added pressure and depression effect, this explains the independence of tack and dependence of adhesion strength on stiffness of paper. Fom this point of view, one may consider tack as the limiting value of adhesion strength.

A New Method for the Analysis of Deformation and Load in a Ball Bearing With Variable Contact Angle

1999 ◽  
Vol 123 (2) ◽  
pp. 304-312 ◽  
Author(s):  
Neng Tung Liao ◽  
Jen Fin Lin
Keyword(s):  
Contact Angle ◽  
Elastic Deformation ◽  
Newton Method ◽  
Contact Surface ◽  
Ball Bearing ◽  
Three Dimensional ◽  
Position Angle ◽  
New Method ◽  
Mechanism Analysis ◽  
Acting Force

The contact angle of a ball in a ball bearing is conventionally assumed to be a constant value in the mechanism analysis; in reality, this is not true. This assumption is made for the purpose of simplifying calculations, but the real elastic deformation produced at the position of each ball due to the acting force varying with the contact angle is unable to be considered. This study tries to establish a simple, three-dimensional expression for the elastic deformation at different position angles in terms of the geometry of the contact surface at the inner and outer races. Simply using the Newton method when the bearing deformations in the radial and axial directions are available can solve the contact angle as a function of position angle. Several characteristics arising from the variable contact angle will be discussed.

Design and Research of Environmentally Compound Deicing Techniques

2013 ◽  
Vol 734-737 ◽  
pp. 2746-2751
Author(s):  
Jian Zhao Zhou ◽  
Xiao Pan Xu ◽  
Wei Jun Chu ◽  
Ju Ying Dai ◽  
Yun He Chen ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Mechanical Milling ◽  
Thermal Water ◽  
Environmentally Friendly ◽  
Water Jet ◽  
New Method ◽  
Accident Rate ◽  
Research Results ◽  
Water Jet Cutting ◽  
Working Principle

Determining how to strikingly and environmentally reduce the accident rate on roads in the snow weather, and ensure the traffic flow and safety in the icy district has become a tough issue nowadays. In the context, this article analyzed the series of current research results on different deicing techniques, and presents a new method which combines the thermal water-jet cutting with mechanical-milling deicing technique. It also introduces the structure and working principle of this device, together with the practicality design. The experiments indicate that this device can perform well in deicing work, environmentally friendly and satisfy to the requirements of design.

A new method based on contact surface profilometry for quantitative measurement of resorbed bone volume

2005 ◽  
Vol 21 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Franco Fusi ◽  
Luca Mercatelli ◽  
Venere Basile ◽  
Mauro Pucci ◽  
Salvatore Siano ◽  
...  
Keyword(s):  
Contact Surface ◽  
Quantitative Measurement ◽  
Bone Volume ◽  
New Method ◽  
Surface Profilometry

Synchronized Entry-Traffic Flow Prediction for Regional Expressway System Based on Multidimensional Tensor

2021 ◽  
pp. 036119812110111
Author(s):  
Hong Gao ◽  
Zengjie Wang ◽  
Zhenjun Yan ◽  
Zhaoyuan Yu ◽  
Wen Luo ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Moving Average ◽  
Three Dimensional ◽  
Prediction Method ◽  
Tensor Decomposition ◽  
New Method ◽  
Traffic Flows ◽  
Traffic Flow Prediction ◽  
Flow Prediction ◽  
Spatial Locations

Predicting entry-traffic flows synchronously could enable inferences about the changing trends and spatial structure of dynamic traffic flows in an expressway network. This research develops a synchronized entry-traffic flow prediction method for regional expressway systems. The new method first organizes numerous entry-traffic flows as a three-dimensional (time slots, spatial locations, and vehicle types) tensor, then applies tensor decomposition to extract their temporally changing features. After forecasting the temporally changing features, predicted values of entry-traffic flows can be calculated synchronously by tensor reconstruction. Data from hourly entry-traffic flows involving nine vehicle types and 201 spatial locations in a regional expressway system of China are used to discuss the performance of this new method. The results show that the new method could obtain prediction results with high overall accuracy. Comparative experiments indicate that the new method and existing methods (autoregressive integrated moving average, or ARIMA, and Holt-Winters) could generate prediction results with similar accuracy. However, the proposed method has the advantage of reducing the number of time series that need to be handled in the prediction of numerous entry-traffic flows for regional expressway systems. This method might be helpful for administrators to guide and manage vehicles so that they enter the expressway system effectively.

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