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Online since: December 2011
Authors: Chang Gao Xia, Zhen Yu Zhang
These results provide a reference for noise reduction and amelioration of the engine.
It is better to reduce the engine noise if simulation results are combined with experimental data.
Online since: February 2013
Authors: Shou Zhong Wang, Chun Hong Dong, Yun Ping Li, Zhi Feng Yang, Tong Zhang, Ju Xu, Jin Hai Zhao, Tian Tian Guo
A lot of traditional methods and techniques included ammonia selective catalytic reduction (SCR) [3], nitric oxides catalytic decomposition [4], adsorption [5], wet scrubbing [6] etc.
Fig.5 SEM of agent (3): Modified carbide slag Table 1 Physical properties of the Treatment agent BET datas Treatment agent Surface area(m2/g) Pore volume(cm3/g) Pore radius(nm) (1) 50.91 0.04 1.101 (2) 95.67 0.07 1.100 (3) 62.40 0.07 1.103 Performance In this work, the major component of NOx is nitric dioxide, which was prepared by Cu reacted with concentrated nitric acid.
The BET data indicated that treatment agent (2) has the largest surface area because of the activated alumina, so that it can absorb a great deal of NOx molecules.
Online since: June 2014
Authors: Bin Ouyang, Zhen Hua Feng, Qing Hua Bi
Due to the lack of basic transport energy consumption data, current studies have mainly focused on the national level, studies of transport carbon emissions on provincial level and grass roots is still in its infancy, a set of scientific calculation methods has not been formed yet.
Among them, the energy consumption and proportion of material handling industry, warehousing, and postal industry is very small (according to the data from National Bureau of Statistics, whole country accounted for 7.73% in 2009).
In addition, the scope of this study only involves transport and production services, the energy consumption and carbon emissions are relatively small and lack of statistical data, which are not be considered.
In this paper, based on Jiangsu Transport Statistics Yearbook over the years, and combined with the transport statistics and monitoring data of the whole province since 2011 [13, 14], and typical survey data from Nanjing, Wuxi, Changzhou, Lianyungang, Nantong, Zhenjiang and other cities, typical ports and companies, the total amount, energy intensity as well as carbon intensity for transport energy consumption and carbon emissions from 2005 to 2012 are calculated and analyzed.
Emissions reduction potential analysis of road transport.
Online since: June 2014
Authors: Zun Ming Ren
The paper utilized the co-integration test, error correction model and Granger causality test, and other methods to verify the influence of the coal, oil and electricity prices, industrial and energy consumption structures on China's energy efficiency based on time-series data from 1979 to 2010.
Due to the limitations of statistics, it is difficult to obtain the accurate data, so the producer price index of the coal industry, oil industry and power industry are adopted and converted into a fixed-base index of 100 in 1979.
The sample range in this paper is 1979 – 2010, and the data to be used are from the China Statistical Yearbook.
Specifically speaking, if the above prices are increased by 1%, the corresponding reduction in the energy intensity will be 0.122%, 0.1555% and 0.1142%.
Summary Based on time-series data from 1979 to 2010, this paper utilized the co-integration test, error correction model and Granger causality test, and other methods to verify the influence of the coal, oil and electricity prices, industrial structure and energy consumption structure on China's energy intensity.
Online since: April 2016
Authors: K.P. Maity, Asit Kumar Parida
The predicting results i.e. cutting forces and temperature distribution were partially validated with the experimental data.
Cutting force, chip thickness was predicted which was validated with experimental data.
Here reduction of cutting forces and better surface finish were obtained using hot machining combine with the ultrasonic vibration compared to conventional machining [7].
All the data of the Inconel 718 and WC insert are retrieved from the library of the software.
Temperature Cutting Forces Validation with Experimental data Turning parameter With tool Geometry Physical and mechanical properties Simulation Process Modified input Parameters No Fig. 3 Steps for FEM Simulation Effect of Preheat temperature on chip Morphology (a) (b) (c) Fig. 4 Formation of chips and temperature at v=40 m/min, f=0.1mm/rev and 0.5 mm depth of constant (a)30°C (b) 250°C (c) 450°C (a) (b) (c) Fig. 5 Formation of chips and temperature at v=60 m/min, f=0.13mm/rev and 0.5 mm depth of constant (a)30°C (b) 250°C (c) 450°C (a) (b) (c) Fig. 6 Formation of chips and temperature at v=100 m/min, f=0.15mm/rev and 0.5 mm depth of constant (a) 30°C (b) 250°C (c) 450°C Fig. 7 Cutting speed vs Chip temperature Fig. 4 shows that temperature in the chip increased with increase of
Online since: May 2013
Authors: Elisa Maria Ruiz-Navas, N. Hari Babu, Elena Gordo, Leandro Bolzoni
From the data reported in Table 1, it can also be noticed that the maximum particle size of the purchased Nb:Al:Ti master alloy is significantly greater with respect to the other powders.
Milling time [min] D10 [µm] D50 [µm] D90 [µm] 15 5.83 24.55 108.97 30 4.94 17.84 54.34 45 2.47 20.08 98.15 60 2.23 17.90 79.76 75 4.36 12.59 45.18 90 1.99 12.31 49.89 From the data reported in Table 2, it can be seen that the maximum particle size of the master alloy is drastically reduced already after 15 minutes of milling.
Considering the data of the cold uniaxially P&S Ti-6Al-7Nb samples shown in Figure 8 a), it can be seen that the density of the specimens increases with the increment of the processing temperature and the trend can be represented by an asymptotic curves.
The relative density values calculated from the data shown in Figure 8 range between 97.4% and 98.0% and, thus, a total percentage of residual porosity which decreases from 2.6% to 2.0% (Figure 8 b).
From the data of the density of the IHP Ti-6Al-7Nb samples, a significant increment of the final density is measured when increasing the sintering temperature from 1100ºC to 1300ºC.
Online since: June 2013
Authors: Imankul Toleukhan
We assign the initial data for , and also the law of external moments . 2.
Let’s substitute in the Lagrange equation, corresponding to, the initial data instead of the unknowns . 4.
Let’s substitute the initial data instead of the unknowns and the found value instead of in the Lagrange equation, corresponding to . 6.
Let’s substitute the initial data instead of and the just found values instead of and in the Lagrange equation, corresponding to . 8.
Let’s substitute the initial data instead of and the just found values instead of in the Lagrange equation, corresponding to . 10.
Online since: February 2012
Authors: Ai Xiang Ge, Yan Xia Fu, Fei Xue, Wei Sun, Jian Ping Yuan
This paper based on CFD software (Fluent) and sound vibration analysis software (SYSNOISE), aimed at research difficulties of internal flow noise for the model centrifugal pump, via the data interface between Fluent and SYSNOISE, and used the CFD and acoustic solver coupling method to solve the internal flow noise in centrifugal pump.
Noise calculation The flow-induced noise in the internal flow field of the diffuser is mainly caused by the pressure pulsation of the inner surface of the volute, and based on this data of the unsteady surface force to calculate dipole radiation source distribution and the sound field.
Data and *.
Fig. 7 Data interface between Fluent and SYSNOISE Rev5.6 In this paper, the DBEM (direct boundary element) was used as a calculation method.
Fig. 8 Sketch of the mesh The grid data of the corresponding pressure pulsation were imported as acoustic grid to produce sound source.
Online since: September 2013
Authors: Le Peng Song, Rui Zhang
Start PID N Preset Temperature Sp Steam valve open maximum Fuzzy Control Nitration Tower Data Collection END 0.9Sp>Uf 0.8Sp>Uf Y Y N N Finish?
Mitsubishi PLC collects the nitration tower temperature data, compares it with the set value, gets and transfers the error through A/D transformation module.
PLC software design features include alarm, data acquisition, data processing of fuzzy control.
After fitting several measurement data, the results are: K= 0.8, T1= 100, T2= 12, τ= 60s, sampling time T= 10s.
PID controller based on fuzzy control applications in warm water automatic reduction.
Online since: August 2011
Authors: Qiang Wu, Bao Yong Zhang, Xia Gao
Therefore the reduction in CH4-emissions will be beneficial in terms of avoiding global warming; CBM is a clean source of energy of high quality, and through CBM development and utilization, we can reduce the dependence on unclean energy such as coal and expensive oil, and rationalize the energy mix; surface extraction will reduce the gas content in coal beds, and as a result reduce mining tragedies during the coal production caused by gas explosions and will lead to a safer and more productive coal exploitation.2 Therefore, it is very important and urgent to develop a new technique for the wide application in CBM separation and for the safe storage and transportation.
It mainly consists of a visual cylindrical high-pressure cell (150.0 ml in volume), a thermo-tank, a gas pressing system, a data logger system and a CCD image system.
The thermodynamic and parameters of hydrate formation, associated with the hydrate images, can be recorded by data logger system and CCD image system.
(4) Cool the thermotank; collect pressure data during hydrate formation with respect to time and store them by a data logger system to calculate hydrate formation rates; turn on the CCD image system to record the data and image in hydrate formation process
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