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Online since: February 2012
Authors: Ming Yu Li, Qing Xuan Zeng, Wen Qing Wang
Kinetics data for adsorption of Cr (VI) from aqueous solutions were in good agreement with the pseudo-second rate equation within an initial concentration range of 50-500 mg×L-1.
Precipitate Cr (III) as Cr(OH)3 at high pH following the reduction of Cr (VI) to Cr (III) was the conventional method for Cr (VI) removal.
Collected data proved that the majority of Cr (VI) molecules present in solution was adsorbed very rapidly within 10 min, indicating a fast process to reach equilibrium.
The equilibrium sorption capacity qe increased with initial concentration of Cr (VI) according to the experiment data, which agreed with pseudo-second order sorption kinetics and differed from pseudo-first order sorption kinetics.
It could be seen that different data with concentration increasing well fitted linear but both the plots didn’t pass the origin of coordinates, which indicated that the initial period was attributed to both boundary layer diffusion and pore diffusion effect.
Online since: February 2013
Authors: Da Jian Zhu, Wei Chen
The one-sidedness of low carbon policy is to equate the absolute reduction and relative reduction.
In fact the intrinsic problem that relative emission reduction can not decrease the CO2 emissions have been ignored.
The process of Shanghai's industrial low carbon development can be as relative emission reduction.
Preventive low-carbon policy is a radically different CO2 reduction management, which is based on effect improvement.
For instance, Shanghai's goal was only 100 million tons of standard coal in 2010 and the Shanghai industrial final energy in 2007 has reached 53.26 million tons, the former data of energy consumption is only 1.9% of the latter one.
Online since: May 2014
Authors: V. Karthickeyan, P. Arulraj
The computerized engine test rig is connected with a NI USB-6210, 16 bit, 250 kS/d data acquisition system which is used to monitor the online readings of fuel consumptions, speed, brake power, indicated power, efficiency, engine temperature, exhaust gas temperature, etc.
Meantime the computer is switched ON to open the Lab View software to be connected to the data acquisition system.
After reaching steady state condition, the readings of speed, brake power, indicated power, brake specific fuel consumption are measured from the data acquisition system.
The increase in length of the catalyst flow length did not contribute in the smoke reduction.
Based on the measured data from the experiments, the emission characteristics of different coated catalytic converter have been compared and plotted with those of baseline uncoated catalytic converter.
Online since: January 2014
Authors: Yang Bai, Jian Lin Yang, Cong Gan Ma, Zhi Gang Lu
Interval method [5, 6] can effectively deal with an ambiguous value of the original data in the actual planning and in this condition a point value is difficult to describe the tabulation of parameter changes and the ranges of reliability index changes.
Load transfer analysis is also a basic task for fault scanning: First, the reconstruction of post-fault system is adopted for network topology analysis; then, according to the data from the topology of the network structure, the range of interval power flow can be calculated, and line transmission capacity and the node voltage constraints are tested.
The original data of feeders and loads can be referred to [8].
Table 1 Reliability comparison of different segments Scenarios SAIDImin SAIDImax CAIDImin CAIDImax ASAImin ASAImax First segment reduction 3.69697 3.77071 15.6601 14.5392 0.99957 0.999578 Middle segment reduction 3.66688 3.73741 15.5012 14.3814 0.999573 0.999581 Tail segment reduction 3.6672 3.73777 15.5032 14.3833 0.999573 0.999581 Table 2 Reliability with different configurations of segmentation Scenarios SAIFImin SAIFImax SAIDImin SAIDImax CAIDImin CAIDImax ASAImin ASAImax basic case 0.23655 0.259872 3.6872 3.75987 15.5874 14.4682 0.999571 0.999579 Segments reduction for one feeder 0.236761 0.260106 3.70926 3.78425 15.6667 14.5489 0.999568 0.999577 Segments reduction for two feeders 0.236955 0.260321 3.75936 3.83962 15.8653 14.7496 0.999562 0.999571 Along with the reduction of segments by calculating, reliability indexes and indices of blackouts are greatly impacted.
Table 3 Comparison of reliability results with different load levels Scenarios ASIFImin ASIFImax ASIDImin ASIDImax ENSmin ENSmax AENSmin AENSmax Overal Increase 0.215407 0.236838 3.06047 3.13388 44.1597 49.9789 0.023144 0.026194 Single Feeder Increase 0.221702 0.243701 3.24827 3.3225 43.5522 49.2368 0.022826 0.025805 Original Results 0.219542 0.241349 3.19459 3.27031 37.3015 42.2052 0.01955 0.02212 Unity load is increased by 50% in the calculation and through the data it can be seen, along with the overall feeder load increases, a greater impact is on system reliability, which greatly reduces system reliability.
Online since: December 2013
Authors: Juraj Žilinský, Peter Juráš
Programs for simulation of heat-air and moisture transport in building envelope uses non-steady boundary condition – outdoor climate data sets – test reference years (TRY) [1].
Analysis of climate data set The climatic data set comes from meteorological station Bratislava – Airport (altitude 133 m above sea level, longitude 17,21°, latitude 48,17°).
The data are from meteorological station Bratislava – Airport.
Therefore it is good to mention the Slovak hydrometeorological institute, which offers long term climate data.
ISBN 978-90-8649-637-2 [6] KORONTHÁLYOVÁ, O. – MATIAŠOVSKÝ, P.: Driving rain course simulation based on daily data.
Online since: September 2013
Authors: Francis Enejo Idachaba
It analyzes the characteristic of each configuration, the impact these different configurations have on data security, deployment speed and communication range and presents an optimal configuration that improves data security, deployment speed and communication range.
Automation & instrumentation is another segment of digital oil field market, which includes key networking processes and communication technologies such as SCADA, PLC, smart well, safety systems, and wireless systems. [1] Digital Oilfield deployments entail the use of real time data collection instruments including sensors, process automation and control devices to acquire process and production data from the field location (reservoir and wellheads) and the transmission of these data to the office domain where data integration, mining and visualization activities are performed and business/ operational decisions are taken to optimize the production process[2][3][4].This technology has led to an increase in field performances, a reduction in CAPEX and OPEX and an improvement in reservoir management [6].
The deployments utilize wired and wireless sensors connected to Remote Terminal Units which collate the data from the field and transmits these data wirelessly to a central processing station [7].
Data reliability 2.
Data security 3.
Online since: June 2009
Authors: Brian J. Walsh, Arturo González
Static deflection data have been used as input to neural networks to identify the structural parameters of a bridge truss [3].
Other techniques use spectral points in frequency response function data as input data to neural networks to identify damage to cantilever beams [4].
Many of the existing damage detection strategies make use of dynamic data, based on forced or ambient vibrations.
The method can be summarised as an iterative procedure, with each iteration composed of two parts: 1. a random data sample is generated and 2. the method of generating the random data is altered, in order to produce a better sample in the next iteration [11].
The influence of noisy data may be reduced by using multiple measurements and more than one static loading case.
Online since: May 2012
Authors: Xu Xin Zhao, Chang Kun Liu, Yun Long Peng, Lin Fang
Data analyses show that with iron-carbon tube as the core component, the MOBF’s removal rate for COD, Cr6+, Cu2+, Zn2+ and CN- were 93%, 99.99%, 99.7%, 96% and 99%, respectively.
As another treatment method, the electrolysis method has the disadvantages of low removal efficiency of COD and BOD [3], but owns great advantages of use of simple equipment, application of automatic control, and integration of oxidation, reduction, cohesion and electro-floatation.
Iron-carbon tube removes the COD, color and odor through electrochemical adsorption, electrochemical oxidation-reduction reaction and the Fenton reaction by adding H2O2 and the flowing reducing agents, applying low voltage (3 ~ 30V) and applying weak current (50 ~ 200mA).
However, data show that the increase of the total inlet water flow will affect the hydraulic retention time.
Fig. 5 The effect of aeration rate on the removal rate Conclusion Experimental data analyses show that with iron-carbon tube as the core component, the magnetlectric oxidation biological filter (MOBF)’s removal rate for COD, Cr6+, Cu2+, Zn2+ and CN- were 93%, 99.99%, 99.7%, 96% and 99%, respectively.
Online since: July 2014
Authors: Rajender Kumar, Vikas Kumar, Sultan Singh
This aspect of generating funds is dependent on two major factors i.e. reduction in product manufacturing cost, and enhancing the product quality to satisfy the customer needs.
On the other hand, the product quality can increased through application of systematic and statistical data analysis tool especially Lean, Six Sigma, SCM, JIT, TPM etc. in the manufacturing sector.
Just-in-time (JIT) or "flow", and "autonomation" (smart automation). [3] Toyota Production System defines Lean as a management philosophy used for reduction in three types of waste i.e. a) Muda (Non-value-adding work), b) Muri (Overburden), and c) Mura (unevenness).
The incorrect application of lean tools results in a waste of time and money including the reduction in confidence level of employees of an organization. [11] The organization culture and maintenance were reported as the factor while converting the non lean organization to lean.
LM focuses on cost reduction by identifying and eliminating non-value added activities.
Online since: September 2014
Authors: Lorand Kun, Alin Constantin Murariu
The testing rig is fully computer controlled and all parameters are stored during a test by the data acquisition system.
The partial conclusion can be drawn from these data that the elongation at break is inversely proportional with the UV exposure time, i.e. the material loses its elasticity the longer it is exposed to UV radiation.
After a 120h exposure time, the reduction in maximum force was only 2.8% for the HA weld, while it maintained the same value in case of the HF weld.
This tendency is shown in Fig. 8, compared to the relative reduction of the specimen’s cross-section.
All the trendlines show good correlation with the experimental data (R2 > 0.9 in all cases).
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