Empirical study of classification process for two-stage turbo air classifier in series

2013 ◽  
Vol 26 (3) ◽  
pp. 526-531 ◽  
Author(s):  
Yuan Yu ◽  
Jiaxiang Liu ◽  
Gang Li
Keyword(s):  
Empirical Study ◽  
Two Stage ◽  
In Series ◽  
Air Classifier

Methods of construction of Geiger-Mueller counters and their use in coincidence experiments

1939 ◽  
Vol 35 (2) ◽  
pp. 309-321 ◽  
Author(s):  
S. C. Curran ◽  
V. Petržílka
Keyword(s):  
Two Stage ◽  
Γ Radiation ◽  
Quantum Energy ◽  
In Series ◽  
Organic Vapour ◽  
Wall Materials ◽  
Thin Walled

The technique adopted in some experiments employing Geiger-Mueller counters is described. The behaviour of a counter in which the extinction of the discharge is external is contrasted with behaviour of a counter in which extinction is internal and dependent on the addition to the gas of some organic vapour such as alcohol. It is shown that the internally extinguished type of counter may be used with a resistance of the order 50,000 ohms in series with it while still retaining all its useful features.Methods of construction of internally extinguished counters are described, particular attention being paid to the question of developing a thin-walled type suitable for experiments employing the method of coincidences. The effect of using different wall materials and gases is investigated with a view to finding those most suitable.The measurement of the quantum energy of hard γ-radiation by the method of coincidences is discussed and details of a reliable two-stage amplifying circuit with a resolving time T of 10−6 sec. are given. Various factors which may influence the value of T are noted.

A Two-Stage Double-Acting Hydraulic Pump Based on Crank Rod in Series with Symmetrical Hinge

2014 ◽  
Vol 615 ◽  
pp. 305-308
Author(s):  
Nan Zhang ◽  
Cheng Feng Sun ◽  
Xiang Dong Cheng ◽  
Wen Wen Zhang
Keyword(s):  
Hydraulic System ◽  
Green Manufacturing ◽  
High Flow ◽  
Low Flow ◽  
Hydraulic Pump ◽  
Two Stage ◽  
High Power Output ◽  
Output Flow ◽  
In Series ◽  
Booster Effect

A new composite drive supercharger based on crank rod in series with symmetrical hinge is introduced. This device utilizes the principle of hinge rod’s force amplification and combines with a two-stage double-acting hydraulic system, it achieves a good booster effect as a result. The two opposed piston-cylinders are excellent for the supplying of the system’s sustainable pressure, it is applied to high power output and green manufacturing. This article carries out a detailed analysis on the operating principle of the system, and the output flow and pressure’s formulas of the low-pressure high flow and high-pressure low flow were given.

Research on the Layout of Integrated Freight Hub Based on Two-Stage Model

2014 ◽  
Vol 989-994 ◽  
pp. 1526-1531
Author(s):  
Yan Yi Chen ◽  
Tie Xin Liu
Keyword(s):  
Empirical Study ◽  
Operations Research ◽  
Transportation Planning ◽  
Research Method ◽  
Freight Transportation ◽  
Hierarchical Cluster ◽  
Planning Theory ◽  
Stage Model ◽  
Two Stage ◽  
Transportation Organization

Applying transportation planning theory and operations research method , this paper proposes the layout model of integrated freight hub with two-stage , which first builds a model to predict the attributes of integrated freight hub aiming for the optimization of regional freight transportation organization , and then works out the way to classify district integrated freight hub based on Hierarchical cluster. Eventually, take a specific example for empirical study.

scholarly journals Stereotypes Determining Perceptions of Female Politicians: The Case of Poland

2018 ◽  
Vol 14 (3) ◽  
pp. 7-30
Author(s):  
Agnieszka Turska-Kawa ◽  
Agata Olszanecka-Marmola
Keyword(s):  
Empirical Study ◽  
Gender Stereotypes ◽  
Right Wing ◽  
Two Stage ◽  
Young Voters ◽  
Female Politicians ◽  
Same Gender

Abstract The aim of this study is to find out whether women in Polish politics are perceived through the prism of gender stereotypes. We conducted a two-stage empirical study (N=447) to investigate the kinds of qualities that young voters attribute to politicians in the context of gender stereotypes. Our findings correlated with a pattern of research that shows that female politicians are typically associated with “female issues” and seen in terms of stereotypically feminine traits. The results of our survey showed gender solidarity, with female and male participants generally responding more positively to politicians of the same gender. There were also significant differences based on respondents’ interest in politics; people interested in politics were, for example, significantly less likely to ascribe qualities related to political ability and self-composure to women. Finally, ideological identifications did not modify perceptions of female politicians but people who identified as right-wing more often viewed male politicians as politically capable, diligent, likeable and go-getters.

scholarly journals Estimation of population mean in two– stage sampling under a deterministic response mechanism in the presence of non-response

2017 ◽  
Vol 9 (3) ◽  
pp. 1666-1675
Author(s):  
Monika Devi ◽  
B. V. S. Sisodia
Keyword(s):  
Empirical Study ◽  
Cost Function ◽  
Simulation Study ◽  
Standard Error ◽  
Response Mechanism ◽  
Two Stage ◽  
Response Models ◽  
Population Mean ◽  
The Real ◽  
Relative Loss

In the present paper, we have considered the problem of estimation of population mean in the presence of non-response under two-stage sampling. Two different models of non-response with deterministic response mechanism have been discussed in the paper. The estimators under two non-response models have been developed by using Hansen and Hurwitz (1946) technique. The expressions for the variances and estimates of variance of these estimators have been derived. The optimum values of sample sizes have been obtained by considering a suitable cost function for a fixed variance. A limited simulation study has been carried out to examine the magnitude of percent relative loss (% RL) in standard error due to non-response. An empirical study with the real populations has also been carried out to assess the % RL in standard error due to non-response.

Hydraulic design for the two-stage stilling basin

1981 ◽  
Vol 8 (2) ◽  
pp. 137-145
Author(s):  
C. D. Smith ◽  
M. J. Klassen
Keyword(s):  
Three Dimensional ◽  
Design Criterion ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Two Stage ◽  
Stilling Basin ◽  
Hydraulic Design ◽  
In Series ◽  
Basin Floor ◽  
High Head

The two-stage stilling basin is a design sometimes used for high head energy dissipating structures. The distinguishing feature of the design is that essentially two hydraulic jumps occur in series in the same structure. The tailwater depth for the first jump is created by a fixed weir. Tailwater for the second jump is due to the natural tailwater available in the downstream channel. Since most of the energy of flow is dissipated in the first jump, the required tailwater depth to produce a jump in the second basin is considerably decreased, with the result that the entire stilling basin floor may be placed at a higher elevation than for a single basin. This can be advantageous in certain situations.In this paper the results of hydraulic model tests for a two-stage stilling basin are reported. The characteristics of the basin first were studied two-dimensionally using a parallel sided flume. A design criterion was established and this was subsequently verified on a three-dimensional model.

Generation of microwave plasma under high pressure and fabrication of ultrafine carbon particles

1998 ◽  
Vol 13 (6) ◽  
pp. 1724-1727 ◽  
Author(s):  
H. Yagi ◽  
T. Ide ◽  
H. Toyota ◽  
Y. Mori
Keyword(s):  
Electron Microscopy ◽  
High Pressure ◽  
Diffraction Analysis ◽  
Microwave Plasma ◽  
Plasma Generator ◽  
Two Stage ◽  
Carbon Particles ◽  
Helium Gas ◽  
In Series ◽  
Fine Carbon

A microwave plasma generator, which functions under high pressure, has been developed and used in the fabrication of fine carbon particles. The plasma generator is a two-stage-type resonator, which consists of rectangular and semi-cylindrical-type resonators which are coupled in series for torching plasma and keeping it stable under high pressure. The plasma can be torched in helium gas at 3 × 106 Pa by tuning the dimensions of apparatus elements. Fine carbon particles of ~50 nm are obtained using a mixture of helium and methane gas. The particles are found to be crystalline from the results of transparent electron microscopy and diffraction analysis.

Buying Online: An Analysis of Shopbot Visitors

2011 ◽  
Vol 12 (4) ◽  
pp. 395-408 ◽  
Author(s):  
Uwe Dulleck ◽  
Franz Hackl ◽  
Bernhard Weiss ◽  
Rudolf Winter-Ebmer
Keyword(s):  
Consumer Behavior ◽  
Empirical Study ◽  
Lower Price ◽  
Purchasing Behavior ◽  
Product Reliability ◽  
Two Stage ◽  
Comparison Site ◽  
Price Comparison ◽  
Robust Evidence

Abstract We conduct an empirical study on the search and purchasing behavior of buyers on an Austrian price comparison site. On such a market a consumer typically searches for the cheapest price of a given product. Reliability and service of the supplier, however, are other important characteristics of an offer. We find robust evidence of consumer behavior that can be described as a two-stage procedure: shoppers first select a group of candidate offers based on the price only; then, in the actual buying decision consumers tradeoff a lower price with higher reliability of the retailer.

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