The New Rotor Diameter Selection of Vertical Shaft Impact Crusher Based on EDEM

2011 ◽  
Vol 148-149 ◽  
pp. 1033-1036
Author(s):  
De Rong Duan ◽  
Fang Zhao ◽  
Xian Xin Chen ◽  
Wei Guo
Keyword(s):  
Dynamic Simulation ◽  
Vertical Shaft ◽  
The Subject ◽  
Impact Plate ◽  
Installation Radius ◽  
The Impact ◽  
Selection Of ◽  
Better Than

The five rotor models of traditional 850mm, 200*400,200*500,250*500,300*500 and 300*600 were imported into EDEM for dynamic simulation, indicated that the acceleration efficiency of new rotor was better than the traditional. In the new rotor, when the subject rotor radius was the constant, the greater the impact plate installation radius, the better the acceleration efficiency; when the impact plate installation radius was the constant, the greater the subject rotor radius, the better the acceleration efficiency.

Determination of integral indicators characterizing the possibility of accommodating the evacuated population in the territory of the Republic of Kazakhstan

2020 ◽  
pp. 154851292097028
Author(s):  
Yernar Zh Akimbayev ◽  
Zhumabek Kh Akhmetov ◽  
Murat S Kuanyshbaev ◽  
Arman T Abdykalykov ◽  
Rashid V Ibrayev
Keyword(s):  
Statistical Data ◽  
Armed Conflicts ◽  
Security Issues ◽  
Inaccurate Information ◽  
The Subject ◽  
The Republic ◽  
The Impact ◽  
Integrated Indicators ◽  
Selection Of

Studying the historical facts of past wars and armed conflicts and natural and man-made emergencies, today in the Republic of Kazakhstan one of the most important security issues is the preparation and organization of the evacuation of the population from possible dangerous zones, taking into account the emergence of new threats to the country’s security. The paper presents an algorithm for constructing universal scales of the distribution function of opportunities by types of support and rebuilding them into subject scales using display functions. The purpose of the paper is to determine the integral indicators characterizing the possibility of accommodation of the evacuated population and the impact on resources during relocation. On the subject scales of cities and districts of the region, indicators of the possibility of relocation of a certain amount of the evacuated population by types of support and indicators characterizing the impact on the district’s resources during resettlement of a certain amount of the evacuated population are determined. It was concluded that the use of integrated indicators allows the selection of areas to accommodate the evacuated population without the use of statistical data, in conditions of incomplete and inaccurate information. The presented method does not replace traditional methods based on classical methods of territory assessment by the level of life sustenance, but also allows their reasonable combination with the experience of specialists in this field, taking into account the incompleteness, uncertainty, and inconsistency of the initial data of the study area, which does not allow the application of existing methods.

scholarly journals On-the-Fly Prediction of Orbit Corrections for RTK Positioning

2006 ◽  
Vol 59 (2) ◽  
pp. 321-334 ◽  
Author(s):  
Ahmed El-Mowafy
Keyword(s):  
Equations Of Motion ◽  
Estimation Accuracy ◽  
Double Exponential ◽  
Double Exponential Smoothing ◽  
Orbital Correction ◽  
Exponential Smoothing Method ◽  
The Impact ◽  
Multiple Reference ◽  
Selection Of ◽  
Better Than

In this study, a method is presented to maintain real-time positioning at the decimetre-level accuracy during breaks in reception of the measurement corrections from multiple reference stations. The method is implemented at the rover by estimating prediction coefficients of the corrections during normal RTK positioning, and uses these coefficients to predict the corrections when reception of the corrections is temporarily lost. The paper focuses on one segment of this method, the on-the-fly prediction of orbital corrections. Frequently, only a few minutes of data representing short orbit ‘arcs’ are available to the user before losing radio transmission. Thus, it would be hard for the rover to predict the satellite positions using equations of motion. An alternative method is proposed. In this method, GPS orbital corrections are predicted as a time series and are added to the initial positions computed from the broadcast ephemeris to compute relatively accurate satellite positions. Different prediction approaches were investigated. Results show that the double exponential smoothing method and Winters' method can be successfully applied. The latter, however, has a better performance. The impact of the data length used for estimation of the prediction coefficients and the selection of seasonal lengths in Winters' method were investigated and some values were recommended. In general, the method can give orbital correction estimation accuracy of less than 5 cm after 15 minutes of prediction. This will result in a positioning accuracy better than 5 cm.

Research of the Installation Angle of New Rotor Impact Plate Based on EDEM

2011 ◽  
Vol 80-81 ◽  
pp. 1133-1137
Author(s):  
De Rong Duan ◽  
Fang Zhao ◽  
Song Wang ◽  
Xian Xin Chen
Keyword(s):  
Dynamic Simulation ◽  
Impact Force ◽  
Three Dimensional ◽  
Substantial Effect ◽  
Maximum Speed ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Installation Angle ◽  
Impact Plate ◽  
The Impact

The three-dimensional model of new rotor was imported into EDEM for dynamic simulation, the maximum speed and force were analysied in the EDEM,indicating that the material along the deterministic trajectory collide with the impact plate for second acceleration after the first acceleration in new rotor, the velocity after second acceleration was 2.3 times than the first acceleration.The impact force and angle did not substantial effect on the second acceleration by comprehensive comparing,the 69m/s speed and less impact force were generated in the new rotor with 2° impact plate installation angle.

scholarly journals Mapping the State of the Art on Green Logistics and Institutional Pressures: A Bibliometric Study

2018 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Tiago Henrique De Paula Alvarenga ◽  
Carlos Manuel Taboada Rodriguez ◽  
Claudia Cecilia Peña-Montoya
Keyword(s):  
Research Methods ◽  
System Development ◽  
Institutional Pressures ◽  
Research Centers ◽  
Green Logistics ◽  
The Usa ◽  
The Subject ◽  
Number Of Citations ◽  
The Impact ◽  
Selection Of

This article aims to build knowledge on the theme “green logistics” and “institutional pressures”, focused on identifying opportunities on its research topic. We used the ProKnow-C intervention instrument, resulting in the selection of 11 relevant articles that came to represent the bibliographic portfolio. Therefore, the bibliometric indicators based on the most prominent journals, the impact factor, the number of citations, the origin of the research centers, the research methods/tools, the most used terms and the subjects covered were used to analyze the articles selected. research in the form of networks. The results showed that the most prominent journal is the International Journal of Production Economics; the article with the largest number of citations (343 citations) is written by Sameer Kumar and Valora Putnam. In relation to the origin of the research centers there was a diversity of institutions of various nationalities, the USA being the country with the largest number of institutions, followed by United Kindon and Malaysia. As for the research methods, we have identified literature reviews, case studies, surveys, conceptual framework proposal and monitoring system development. In relation to the mapping and research networks, we highlight terms such as logistic, regulatory pressure, practice, driver, economic performance, institutional pressure, among other relevant terms. In this context, this information can “shed light” on interested parties and researchers on the subject in order to conceptualize, interpret and visualize their relevance, as well as the coverage networks and related researches.

Exploring the Determinants of Broadway Show Success

1998 ◽  
Vol 35 (3) ◽  
pp. 370-383 ◽  
Author(s):  
Srinivas K. Reddy ◽  
Vanitha Swaminathan ◽  
Carol M. Motley
Keyword(s):  
New York ◽  
Information Sources ◽  
New York Times ◽  
Differential Impact ◽  
Daily News ◽  
Types Of Information ◽  
Ticket Prices ◽  
The Impact ◽  
Selection Of ◽  
Better Than

This study investigates the determinants of success of an experiential good: Broadway shows. The authors focus on the sources and types of information used in the selection of an artistic event and discuss the impact of critics’ reviews on the length of a show's run and attendance. In addition, the authors empirically determine the influence of other variables, such as previews, newspaper advertising, ticket prices, show type, talent characteristics, and timing of opening. The results indicate that New York newspaper theater critics have a significant impact on the success of Broadway shows. It is also found that the newspaper critics have a differential impact, with the critic from the New York Times yielding nearly twice as much influence as critics from the Daily News or the New York Post. Theater critics, it appears, are not only predictors but influencers as well. Among the various show types, musicals appear to fare better than other categories of shows. Previews have a significant impact on the attendance, but not on the longevity, of Broadway shows. Advertising also has a significant impact on both longevity and attendance. However, the characteristics of the key talent do not have a consistently significant influence on show success. In addition, ticket prices do not have a significant relationship with either longevity or attendance. The results indicate that there is an overwhelming impact of information sources, particularly the influence of critics’ reviews, on the success of Broadway shows. The authors discuss the implications of these results for the theater industry.

scholarly journals Typefaces Are All Almost the Same. Non-systematic Review of Scientific Findings on the Impact of Typographic Features on Reading Performance

2021 ◽  
Vol 74 (74) ◽  
Author(s):  
Luciano Perondi
Keyword(s):  
Systematic Review ◽  
Reading Performance ◽  
Reading Process ◽  
The Subject ◽  
The Impact ◽  
Better Than

"The interest in discovering the limits of legibility has not ceased to interest those who use letters in typography and, to a certain extent, those who study the reading process. Sometimes the debate on the subject is marred by sensationalism. The research does not aim to identify a particular typeface and to promote it as “best for legibility”. The research aims to identify what are the possible reasons that make one typeface better than another and to make this knowledge available to the community, so that the typefaces can guarantee better reading performance, if this is possible."

ICA – Evolution is Better than Revolution

1989 ◽  
Vol 21 (10-11) ◽  
pp. 1325-1331
Author(s):  
A. R. Comley
Keyword(s):  
New Technology ◽  
Gradual Evolution ◽  
The Impact ◽  
Selection Of ◽  
Better Than

This paper describes how the impact of I.C.A. can cause considerable difficulties to the unknowledgeable user. It is proposed that a programme of gradual evolution is devised to improve understanding and confidence in new technology. Suggestions are given on developing expertise, the specification and selection of equipment, installation and commissioning and overcoming operational problems.

scholarly journals LONG-WAVE DYNAMICS IN THE CONTEXT OF THE DEVELOPMENT OF INSTITUTIONAL ECONOMIC THEORY

2020 ◽  
pp. 120-125
Author(s):  
B. A. Yerznkyan
Keyword(s):  
World Wide ◽  
Institutional Economics ◽  
Executive Power ◽  
Economic Systems ◽  
Wave Dynamics ◽  
Institutional Economic ◽  
Long Wave ◽  
The Subject ◽  
The Impact ◽  
Selection Of

The subject of the study is the long-wave dynamics due to the impact of scientific and technological progress and examined from the standpoint of institutional economics. The goal of the paper is identification of the features of the long-wave dynamics phases from the standpoint of technological, institutional and world-wide structures. Analytical and logical methods of institutional analysis have been used. The need of correcting the long-wave dynamics notions, caused as by objective changes of economic development as well as by the evolving nature of institutional theory has been identified. The results can be used by executive power authorities relating to strategic management of the development and connecting with the design of social and economic institutions that support self-organization and sustainable functioning of ecosystems. It has been proved that the development of economic systems depends on the relevant selection of technological, institutional and world-wide economic structures and ways of managing them. It has been shown that intra-firm transactions are based on the implicit ternary contracts, market with the mediators on the explicit ternary contracts, market without mediators on the explicit binary contracts, and the network transactions in ecosystems are based on the implicit binary contracts.

Research of the Ejection Angle of Guiding Device in Vertical Shaft Impact Crusher Rotor

2014 ◽  
Vol 685 ◽  
pp. 182-186
Author(s):  
Shi Jian Li ◽  
Fang Zhao ◽  
Yuan Bo Cai ◽  
Na Zhao ◽  
Xian Xin Chen
Keyword(s):  
Discrete Element ◽  
Vertical Shaft ◽  
Ejection Angle ◽  
Impact Plate ◽  
Guide Device ◽  
Mass Ejection ◽  
The Impact

In this paper, a new rotor with two impact in the vertical shaft impact crusher is analyzed, an effect of the angle at the guide device thrown materials on the velocity that material reach the impact plate and rebound to a anvil in the crushing chamber are discussed. three mass ejection Angle are simulated by discrete element software EDEM, and the result shows that effect of two impact of new rotor on acceleration material is best when ejection angle is 25 °.

scholarly journals HLA-B Leader and Survivorship after HLA-Mismatched Unrelated Donor Transplantation

Blood ◽  
2020 ◽  
Author(s):  
Effie W Petersdorf ◽  
Philip Stevenson ◽  
Mats Bengtsson ◽  
Dianne De Santis ◽  
Valerie Dubois ◽  
...  
Keyword(s):  
Hematopoietic Cell Transplantation ◽  
Unrelated Donor ◽  
Blood Disorders ◽  
Regression Methods ◽  
New Information ◽  
Life Threatening ◽  
Unrelated Donors ◽  
The Impact ◽  
Selection Of ◽  
Better Than

Hematopoietic-cell transplantation (HCT) from HLA-mismatched unrelated donors can cure life-threatening blood disorders but its success is limited by graft-versus-host disease (GVHD). HLA-B leaders encode methionine (M) or threonine (T) at position 2 and give rise to TT, MT or MM genotypes. The dimorphic HLA-B leader informs GVHD risk in HLA-B-mismatched HCT. If the leader influences outcome in other HLA-mismatched transplant settings, the success of HCT could be improved for future patients. We determined leader genotypes for 11872 patients transplanted between 1988 and 2016 from unrelated donors with one HLA-A -B,-C,-DRB1 or -DQB1 mismatch. Multivariate regression methods were used to evaluate risks associated with patient leader genotype according to the mismatched HLA locus and with HLA-A,-B,-C,-DRB1 or -DQB1 mismatching according to patient leader genotype. The impact of the patient leader genotype on acute GVHD and mortality varied across different mismatched HLA loci. Non-relapse mortality was higher among HLA-DQB1-mismatched MM patients compared to HLA-DQB1-mismatched TT patients (hazard ratio 1.35; P = .01). Grades III-IV GVHD risk was higher among HLA-DRB1-mismatched MM or MT patients compared to HLA-DRB1-mismatched TT patients (odds ratio 2.52 and 1.51, respectively). Patients tolerated a single HLA-DQB1 mismatch better than mismatches at other loci. Outcome after HLA-mismatched transplantation depends on the HLA-B leader dimorphism and the mismatched HLA locus. The patient's leader variant provides new information on the limits of HLA mismatching. The success of HLA-mismatched unrelated transplantation might be enhanced through the judicious selection of mismatched donors for a patient's given leader genotype.

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