نتایج جستجو برای: average relative error

تعداد نتایج: 953877  

Abbas Maleki Ali Mokhtaran Mohammad Salakhpoor,

The research in the fields of irrigation and drainage network in the province Hamidieh to evaluate the performance of drainage was done in the land. For this purpose, three drainage server farm at intervals of 50, 70 and 80 meters in the area was selected. Blank observation on three drain pipes at intervals of 0.3,0.8,1.5,2.5 and 15 meters of lateral drains in the middle of the line in four row...

Journal: :journal of chemical and petroleum engineering 0
reza rooki birjand university of technology, birjand, iran.

underbalanced drilling as multiphase flow is done in oil drilling operation in low pressure reservoir or highly depleted mature reservoir. correct determination of the pressure loss of three phase fluids in drilling annulus is essential in determination of hydraulic horsepower requirements during drilling operations. in this paper the pressure loss of solid-gas-liquid three-phase fluids flow in...

Journal: :Remote Sensing 2017
Daewon Kim Hanlim Lee Hyunkee Hong Wonei Choi Yun Gon Lee Jun-Sung Park

Surface NO2 volume mixing ratio (VMR) at a specific time (13:45 Local time) (NO2 VMRST) and monthly mean surface NO2 VMR (NO2 VMRM) are estimated for the first time using three regression models with Ozone Monitoring Instrument (OMI) data in four metropolitan cities in South Korea: Seoul, Gyeonggi, Daejeon, and Gwangju. Relationships between the surface NO2 VMR obtained from in situ measurement...

1986
Joan Bachenko Eileen Fitzpatrick C. E. Wright

While various aspects of syntactic structure have been shown to bear on the determination of phraselevel prosody, the text-to-speech field has lacked a robust working system to test the possible relations between syntax and prosody. We describe an implemented system which uses the deterministic parser Fidditch to create the input for a set of prosody rules. The prosody rules generate a prosody ...

2010
Md. Nazrul Hoque

Estimated population is one of the most widely used products of demographic analyses. Population estimates are difficult to complete with accuracy for small areas because small areas can grow or decline rapidly, can change directions from growth to decline or from decline to growth, or undergo substantial changes in age, sex, race/ethnicity and other demographic characteristics. As a result, it...

2012
David A. Swanson

This paper deals with an issue that appears to be unexplored by demographers. The issue Is based on the question: "if one was not only doing ex post facto evaluations of estimates (or projections) of the total population but by characteristics such as race and geography, how would one summarize the summary measures of error?" The paper examines this issue in two dimensions using a standard summ...

Journal: :ISPRS Int. J. Geo-Information 2017
Zhichen Yu Shaobo Zhong Chaolin Wang Yongsheng Yang Guannan Yao Quanyi Huang

With the continuous progress of human production and life, air quality has become the focus of attention. In this paper, Beijing, Tianjin, Hebei, Shanxi, Shandong and Henan provinces were taken as the study area, where there are 58 air quality monitoring stations from which daily and monthly data are obtained. Firstly, the temporal characteristics of the air quality index (AQI) are explored. Th...

Journal: :international journal of iron and steel society of iran 0
m. rakhshkhorshid department of mechanical and materials engineering, birjand university of technology, south khorasan, p.o. box 97198-66981, iran h. rastegari department of mechanical and materials engineering, birjand university of technology, p.o.box: 97175-569, birjand, iran

the main contribution of the present work is to investigate the capability of exponential-type constitutive equationto model the warm deformation flow curves of a eutectoid steel in the temperature range of 620-770 °c andat the strain rates in the range of 0.01-10 s-1 conducted on a gleeble-1500 thermomechanical simulator. warmdeformation in this temperature range facilitates the occurrence of ...

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