Results 21 to 30 of about 179,758 (363)

Open Pipes, Stopped Pipes and Double Stopped Pipes [PDF]

The Journal of the Acoustical Society of America, 1931
Air columns in rigid tubes reflect pulses (sound waves) at the ends. The classical sounding or vibrating air column is the organ pipe, broadly classed as either “open” or “stopped” and giving tones of different quality because lack of symmetry in stopped organ pipes suppresses the evenly numbered harmonic overtones.
openaire   +1 more source

Incorporating Location Aspects in Process Integration Methodology

Energies, 2019
The large potential for waste resource and heat recovery in industry has been motivating research toward increasing efficiency. Process integration methods have proven to be effective tools in improving industrial sites while decreasing their resource ...
Hür Bütün, Ivan Kantor, François Maréchal   +2 more
doaj   +1 more source

Experimental study on the change law of internal erosion and seepage characteristics of inverse grading sand accumulation

地质科技通报, 2023
Inverse grading deposits are commonly found in circulation and accumulation areas of high-speed and long-distance landslides. Due to its special structure of large particle size at the top and small at the bottom and strong permeability, the accumulation
Yixiang Song, Jinghua Guan, Yanqi Li, Da Huang   +3 more
doaj   +1 more source

Cost-Optimal Heat Exchanger Network Synthesis Based on a Flexible Cost Functions Framework

Energies, 2019
In this article an approach to incorporate a flexible cost functions framework into the cost-optimal design of heat exchanger networks (HENs) is presented.
Matthias Rathjens, Georg Fieg
doaj   +1 more source

Quantitative evaluation of the complementarity and capacity ratio of large-scale wind power and photovoltaic

Journal of Applied Science and Engineering
Aiming at the problem that the existing correlation analysis can’t clearly describe the change characteristics of wind power and photovoltaic, this paper takes the clean energy base in the upper reaches of the Yellow River as an example to study the ...
Naihui Peng, Jinniu Miao, Shuzhe Hu, Liqian Zhao, Yue Wang, Fanyan Meng, Yang Yi, Zhaoxuan Zheng   +7 more
doaj   +1 more source

RESEARCH ON SHUTDOWN STRESS AND FATIGUE LIFE OF AIR CONDITIONING PIPING

Jixie qiangdu, 2021
It is very important to determine the reasonable shutdown stress of air-conditioning piping,and it is related to the piping reliability and development cost.
WANG Xuan, ZHANG JieXi, HUANG JianNan
doaj  

Influence of piping processes on the relief evolution. Bardenas Reales (Navarra, Spain)

Cuadernos de Investigación Geográfica, 2013
Piping processes are controlled by many interacting factors, such as dispersion index and sodium content, SAR and ESP, together with other important factors as cracking density, slope degree and climate.
G. Desir, C. Marín
doaj   +1 more source

Una nueva herramienta para evaluar la susceptibilidad de los suelos a los procesos de sufosión o piping : el pinhole test

Cuadernos de Investigación Geográfica, 2013
Los procesos de piping o sufosión se han observado en paisajes naturales y antrópicos, en diferentes litologías y climas, y bajo diferentes usos del suelo y cubiertas vegetales.
E. Nadal-Romero, E. Verachtert, R. Maes, J. Poesen   +3 more
doaj   +1 more source

Hybrid Artificial Neural Network with Extreme Learning Machine Method and Cuckoo Search Algorithm to Predict Stock Prices

Contemporary Mathematics and Applications (ConMathA), 2020
This thesis aims to predict the stock prices, using artificial neural network with extreme learning machine (ELM) method and cuckoo search algorithm (CSA). Stock is one type of investment that is in great demand in Indonesia.
Piping Prabawati, Auli Damayanti, Herry Suprajitno   +2 more
doaj   +1 more source

Plastic collapse of pipe bends under combined internal pressure and in-plane bending [PDF]

, 2005
Plastic collapse of pipe bends with attached straight pipes under combined internal pressure and in-plane closing moment is investigated by elastic–plastic finite element analysis.
Li, H., Mackenzie, D., Robertson, A.C.
core   +1 more source