A Study on the Correlativity and Date Simulation between Rock Abrastivity and Physical and Mechanical Indexes of Rock in Qingdao Subway, China

2012 ◽  
Vol 476-478 ◽  
pp. 1718-1721 ◽  
Author(s):  
De Hong Jiang ◽  
Li Ming Bian
Keyword(s):  
Test Data ◽  
Influence Factor ◽  
Mathematic Model ◽  
Economic Benefits ◽  
Attrition Rate ◽  
Subway Tunnel ◽  
Tbm Cutter ◽  
Digging Efficiency ◽  
The Relationship ◽  
Main Influence

The attrition rate of a TBM cutter connects with the economic benefits of the TBM application and digging efficiency. The main influence factor of the attrition rate of the TBM cutter is rock abrastivity. The rock abrastivity is in contact with the physical and mechanical indexes of rock and rock attributes. The relationship between the rock abrastivity and the physical and mechanical indexes of rock is studied by experiments and mathematical statistics. The experimental samples are collected in the Qingdao subway tunnel and done rock mechanics room experimentation and rock abrastivity experimentation separately in the lab Based on calculation and analyses of the test data. We obtain a mathematic model describing the relationship between rock abrastivity and physical and mechanical indexes of rock and summarize and interpret the correlativity between them.

The Analysis on the Starting Friction Torque Increase of Magnetic Fluid Revolving Sealing

2013 ◽  
Vol 275-277 ◽  
pp. 429-432 ◽  
Author(s):  
Yu Qiang Cai ◽  
Na Xing
Keyword(s):  
Magnetic Fluid ◽  
Magnetic Particles ◽  
Influence Factor ◽  
Magnetic Field Gradient ◽  
Friction Torque ◽  
Key Factor ◽  
Lower Temperature ◽  
Change Of Microstructure ◽  
Starting Torque ◽  
Main Influence

Abstract. Magnetic fluid revolving sealing is widely used in modern industry. In the process of application, it is founded that the starting friction torque is very large, particularly at lower temperature. This problem has become a key factor restricting the application of magnetic fluid rotation sealing. In this paper, the mechanism of starting torque increase is analyzed, based on the change of microstructure and its viscosity. After analysis , such conclusion is obtained , which can be described: to a certain sealing structure, the type of magnetic fluid, size distribution of magnetic particles as well as the working condition concluding temperature, magnetic field gradient and the revolving velocity of shaft is the main influence factor of starting friction torque . It is very useful to reduce the starting friction torque.

Comparison of Endoscopic Retrograde Pancreatography with Functional and Histologic Changes in Chronic Pancreatitis

1987 ◽  
Vol 28 (3) ◽  
pp. 289-293 ◽  
Author(s):  
H. A. Heij ◽  
H. Obertop ◽  
M. van Blankenstein ◽  
G. A. J. J. Nix ◽  
D. L. Westbroek
Keyword(s):  
Chronic Pancreatitis ◽  
Discriminant Analysis ◽  
Test Data ◽  
Pancreatic Surgery ◽  
Pancreatic Disease ◽  
Pancreatic Tissue ◽  
Endoscopic Retrograde Pancreatography ◽  
Endoscopic Retrograde ◽  
The Relationship ◽  
Histologic Changes

The findings from endoscopic retrograde pancreatography (ERP) and secretin-CCK test data were compared in 69 patients: 36 with chronic pancreatitis, 9 with possible chronic pancreatitis, and 24 without chronic pancreatic disease. The ERP findings were also compared with the histologic changes in pancreatic tissue in 18 patients who underwent pancreatic surgery for chronic pancreatitis. ERP films were reviewed according to the criteria proposed by Kasugai et coll. (8) with special attention paid to the side branches. Secretin-CCK test data were interpreted using the discriminant analysis. A good correlation between bicarbonate and chymotrypsin output and ductular changes at ERP was found. The results of ERP and the secretin-CCK test were compatible in 86 per cent of the patients. The relationship between ERP findings and histologic changes was not straightforward. It was concluded that ERP and the secretin-CCK test are complementary in the diagnosis of chronic pancreatitis. ERP does not necessarily represent the histology in chronic pancreatitis.

Power Feedward Strategy of Grid-Connected Inverter Based on Direct Power Decoupling

2013 ◽  
Vol 331 ◽  
pp. 311-314
Author(s):  
Chun Peng Fu ◽  
Yong Qiang Zhu
Keyword(s):  
Output Power ◽  
Mathematic Model ◽  
Direct Power ◽  
Loop Control ◽  
Grid Voltage ◽  
Voltage Change ◽  
Power Decoupling ◽  
Grid Connected Inverter ◽  
The Relationship ◽  
Power Response

Take into account grid inverter that using direct power control is vulnerable to the disturbance of grid voltage, a control algorithm is proposed based on the relationship between the power and voltage, which is deduced according to the mathematic model of the inverter that using double-loop control strategy. The change amount of the output power of inverter is added to the reference of power closed-loop as power feedforward, which improves the dynamic response to the grid voltage change. Simulations with EMTDC/PSCAD are carried out and the comparison of output power response to grid voltage change between control with and without power feedforward verifies its effectiveness.

scholarly journals Hubungan Antara Kualitas Guru dengan Prestasi Belajar Siswa pada Mata Pelajaran Housekeeping

Media Wisata ◽  
2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sri Larasati
Keyword(s):  
Student Achievement ◽  
Data Analysis ◽  
Teacher Quality ◽  
Test Data ◽  
Moment Analysis ◽  
Analysis Method ◽  
Improve Performance ◽  
Employment Practices ◽  
The Relationship

Teacher Quality is one factor that determines student achievement, the research to find out the relationship and contribution to the quality of teachers to student achievement in subjects Housekeeping. This Reseach is expected to expective to be useful for teachers to improve performance. To measure student achievement are used Pearson Product Moment analysis method. Of test data analysis can be seen that there is asignificant relationship with the teacher quality anatara student achiement, which toount (7.09423) is greater than ttable (2.021). Whereas the contribution of teacher quality on student achiement is the amount of KP 46.64% while the remaining 53.36% is determinedby other variables is one of the largest employment practices in the industry.

scholarly journals Influence factor of consumers interest on using E-money

2019 ◽  
Vol 3 (2) ◽  
pp. 176-186
Author(s):  
Ni Wayan Mentari ◽  
I Nyoman Djinar Setiawina ◽  
I Made Kembar Sri Budhi ◽  
I Wayan Sudirman
Keyword(s):  
Influence Factor ◽  
Consumer Attitudes ◽  
Structural Equations ◽  
Partial Least Square ◽  
Least Square ◽  
Coefficient Of Determination ◽  
Consumer Knowledge ◽  
Perceived Benefits ◽  
Consumer Interest ◽  
The Relationship

The objectives of this study was to determine the factors that influence consumer interest in using e-money in Badung and Denpasar City in Bali. This study uses the analysis of SEM structural equations with alternative Partial Least Square (PLS). Consumer attitudes mediate the influence of the relationship between perceived benefits and perceived ease of consumer interest in using e-money, the attitude of consumers in using e-money does not mediate the effect of the relationship between customer knowledge on consumer interest in using e-money. The coefficient of determination R-square for attitude variables is 0.502, which means that the variable attitude of consumers in using e-money can be explained by the variable perception of benefits, perceived convenience and consumer knowledge by 50.2 percent, or in other words, every variant of consumer attitudes e-money will be explained by the variable perception of benefits, perceived ease and consumers knowledge by 50.2 percent, the rest explained by other variables outside the model by 49.8 percent.

scholarly journals Institutional Obstacles and Solutions to the Integration and Development of Cultural Tourism in Chongqing

2020 ◽  
Vol 4 (1) ◽  
pp. 9
Author(s):  
Shaoyuan Wang
Keyword(s):  
Cultural Tourism ◽  
Economic Benefits ◽  
Current Situation ◽  
Cultural Development ◽  
Social Benefits ◽  
Cultural Industries ◽  
Cultural System ◽  
Basic Purpose ◽  
The Relationship ◽  
General Secretary

<p>General Secretary Jinping Xi pointed out that "In the process of promoting the reform of cultural system and the prosperity and development of cultural undertakings and industries, the relationship between ideological attributes and industrial attributes, social benefits and economic benefits should be grasped." The basic purpose of the establishment of the Ministry of Culture and Tourism in China is to promote the integration and development of cultural undertakings, cultural industries and tourism, to guide tourism with culture and to promote cultural development with tourism. Based on the current situation of the integration and development of cultural tourism in Chongqing, this paper analyzes its four major institutional obstacles and puts forward specific solutions.</p>

scholarly journals Hubungan Antara Komunikasi Interpersonal Pasutri dengan Keharmonisan dalam Pernikahan

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Nyoman Riana Dewi ◽  
Hilda Sudhana
Keyword(s):  
Data Analysis ◽  
Interpersonal Communication ◽  
Test Data ◽  
Random Sampling ◽  
Quantitative Research ◽  
Interpersonal Relationship ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
The Relationship ◽  
Effective Contribution

Marital harmony will be difficult to achieve without a good interpersonal relationship between husband and wife. In creating a good interpersonal relationship needs effective communication so as to prevent yourself from situation that could damage the relationship and can lead to not harmonious marriage. This study aimed to determine the relationship between interpersonal communication with marital harmony.   This study is a quantitative research that used a product moment correlation. The sampling technique used is the technique simple random sampling, with 110 subjects. The scale used in this research are scale interpersonal communication and scale marital harmony. Based on the results obtained correlation values (r) of 0,649 with probabilities of 0,000 (p<0,05). The result from test data analysis is that there is a positive and significant correlation between interpersonal communication with marital harmony. The effective contribution to interpersonal communication with marital harmony is 42,2% and the others are 57,8% is influenced by other factors not examined in this study.   Keywords: Interpersonal communication, marriage harmony

scholarly journals AVALIAÇÃO DO CONSUMO DE PALMITO DE PUPUNHA NO LITORAL DO PARANÁ EVALUATION OF CONSUMPTION OF HEART-OF-PALM OF THE PEJIBAYE IN THE COAST OF PARANÁ

2011 ◽  
Vol 12 (1) ◽  
Author(s):  
Adilson ANACLETO ◽  
Márcia ROTHBART ◽  
Neiva Maria FIORENTIN ◽  
Patrícia Andrioli de SOUZA ◽  
Rosani Kruger PRESTES
Keyword(s):  
Wild Species ◽  
Native Species ◽  
Influence Factor ◽  
Palm Tree ◽  
Bactris Gasipaes ◽  
Agricultural Producers ◽  
Sensorial Evaluation ◽  
Main Influence

A Bactris gasipaes Kunth é uma palmácea que produz o palmito utilizado na alimentação humana, popularmente conhecida como pupunha. É uma palmeira resultante da domesticação de várias espécies silvestres, portanto uma planta não extrativista, sendo considerada alternativa econômica a produtores rurais. No litoral do Paraná, região onde tradicionalmente é industrializado palmito de espécies nativas, a partir de 2000 ocorreu um crescimento de áreas cultivadas da pupunha. A pupunha continua tendo restrições no momento da comercialização do produto industrializado devido ao sabor adocicado da espécie. A pesquisa teve por proposta avaliar a aceitação ou rejeição no consumo do palmito de pupunha em conserva em comparação com o palmito Jussara (Euterpe endules), espécie de maior aceitação popular na região da pesquisa. Um total de 80 indivíduos participaram da avaliação sensorial, que foi acompanhado de um questionário de caracterização do perfil do consumidor. O preço do palmito foi o principal fator de influência no consumo. O palmito de pupunha quando avaliado em testes cegos não sofre rejeição dos consumidores. Abstract The Bactris gasipaes Kunth is a palm that produces the heart of palm used in the human feeding, popularly known as pejibaye. It is a resultant palm tree from the domestication of several wild species, therefore a no extractivist plant, being considered an economic alternative to the agricultural producers. In the Paraná coast, the region where traditionally it is industrialized native species of heart of palm, from 2000 started to occur a growth of cultivated areas of pejibaye. The pejibaye palm continues having restrictions at the industrialization product commercialization moment due to the sweet flavor of the species. The research had the proposal to evaluate the acceptance or rejection in the consumption of this heart of palm (pejibaye) in conserve in comparison to the heart of palm Jussara (Euterpe endules), species of larger popular acceptance in the region of the research. A total of 80 individuals participated of the sensorial evaluation, which had a questionnaire of consumer profile characterization. The price of the heart of palm was the main influence factor of consumption. The pejibaye heart of palm when evaluated in blind tests does not suffer rejection from the consumers.

scholarly journals Correcting Bias in Crowdsourced Data to Map Bicycle Ridership of All Bicyclists

Urban Science ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 62 ◽  
Author(s):  
Avipsa Roy ◽  
Trisalyn A. Nelson ◽  
A. Stewart Fotheringham ◽  
Meghan Winters
Keyword(s):  
Temporal Resolution ◽  
Test Data ◽  
Training Data ◽  
Residential Areas ◽  
Maricopa County ◽  
Covariate Data ◽  
Street Level ◽  
Crowdsourced Data ◽  
The Relationship ◽  
The City

Traditional methods of counting bicyclists are resource-intensive and generate data with sparse spatial and temporal detail. Previous research suggests big data from crowdsourced fitness apps offer a new source of bicycling data with high spatial and temporal resolution. However, crowdsourced bicycling data are biased as they oversample recreational riders. Our goals are to quantify geographical variables, which can help in correcting bias in crowdsourced, data and to develop a generalized method to correct bias in big crowdsourced data on bicycle ridership in different settings in order to generate maps for cities representative of all bicyclists at a street-level spatial resolution. We used street-level ridership data for 2016 from a crowdsourced fitness app (Strava), geographical covariate data, and official counts from 44 locations across Maricopa County, Arizona, USA (training data); and 60 locations from the city of Tempe, within Maricopa (test data). First, we quantified the relationship between Strava and official ridership data volumes. Second, we used a multi-step approach with variable selection using LASSO followed by Poisson regression to integrate geographical covariates, Strava, and training data to correct bias. Finally, we predicted bias-corrected average annual daily bicyclist counts for Tempe and evaluated the model’s accuracy using the test data. We found a correlation between the annual ridership data from Strava and official counts (R2 = 0.76) in Maricopa County for 2016. The significant variables for correcting bias were: The proportion of white population, median household income, traffic speed, distance to residential areas, and distance to green spaces. The model could correct bias in crowdsourced data from Strava in Tempe with 86% of road segments being predicted within a margin of ±100 average annual bicyclists. Our results indicate that it is possible to map ridership for cities at the street-level by correcting bias in crowdsourced bicycle ridership data, with access to adequate data from official count programs and geographical covariates at a comparable spatial and temporal resolution.

Sign in / Sign up

Export Citation Format

Share Document