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Online since: January 2012
Authors: Zhen Long Leng, Jin Feng Yang, Qun Ping Liu, Xun Deng
On the other hand, three-dimensional digital model is the key of assembly and CAM, and thus it can enables information data base of computer-aided technology, computer-aided management, computer aided process sales.
The results obtained in the post-processing solution calculation can be graphics and data.
But the motor and the ball screw have reduction gear box, so we add position feedback encoder on the servo as semi-closed loop system, which can overcome the transmission error of the resulting transmission gear box.
The torque of boring and milling processing is so large that we must use DC motors as spindle drive equipment, and reserve the gear reduction mechanism to ensure the low-speed and high-torque characteristics, and spindle speed feedback use encoder.
Online since: May 2012
Authors: Xun Feng Xia, Chang Jia Li, Bei Dou Xi, Hong Jun Lei
However, no computational problem arises if the data set contains zero values [6].
The second one is the existence of zero value in the data series causing an error result by the Divisia index method.
However, for AMDI, the formulae of SAD 1 generate computational problems when zero values appear in the data set.
No computational problem arises if the data set contains zero values.
Fig.2 Changes in China’s industrial COD discharges (2001-2009) (Data resources: ASREC [18]).
Online since: July 2012
Authors: Piotr Żółtowski, Henryk Zobel
Measuring equipment Following equipment was used for measurement of vibration: · Acceleration sensors type 393A03 produced by PCB Piezotronics, · Data acquisition module VibDAQ produced by EC Electronics, · PC computer with software Sigview.
Acceleration sensor mounted on the old abutment Opposite to mentioned above examples following equipment was used for measurement of vibration: · Acceleration sensors type ADXL-203 · Data acquisition module National Instruments NI-6009 · PC computer Technical parameters of vibration measurement: · Range of sensor measurement: : +/- 17m/s2 · Frequency of sampling : 1kHz/channel · Resonance frequency of sensor : 2kHz · Fixing of sensor to the structure : epoxy glue The impact nature of vibration make difficult estimation of frequency.
There are many techniques that may be applied when engineering task shall be optimized for reduction of vibrations on surrounding environment.
Usually for most buildings the higher frequency is better in terms of reduction of impact
Online since: February 2014
Authors: Wei Hua Fang
We will obtain reduction order linear equations by substitution of the data obtained from WNS into Eq.10.
Unknown nodal displacements and stress on the boundary can be obtained by solving reduction equations mentioned above.
Interpolating Boundary Element-free Method (IBEFM) is another method which can utilize measured data of WSN directly without dividing element on boundary of structure.
Online since: February 2011
Authors: Xi Fang Sun, Chun Li, Zhan Sheng Wu
The content of CA exhibited almost no variation and that of TA and MA showed a slight reduction after one-day treatment and then they maintained a relative invariant value.
However, SA and LA presented a slow and gradual reduction trend during the clarification period.
The processing of the data (the first day) was calculated by regression analysis and analysis of variance (ANOVA) was allowed to establish a mathematical relation between pH, CA and TA, which described as equation (1), and also a mathematical relation between titratable acidity, CA, TA, SA and LA, which described as equation (2).
Fig.5, obtained by calculating the data originated from Fig.1, showed the average elimination ratio (AER) of organic acids on the first day.
Online since: December 2012
Authors: Yi Huan Zhu, Jing Bo Su, Feng Wu
P-y Curves Formula of Hard Clay : For the hard clay, the standard value of undrained shear strength is greater than 96Kpa, it is more brittle than soft clay and there have a lot of uncertain influence factors, the study is still immature at present, so the P-y curves should be plotted according to the test data of pile.
If there is no test data, the calculating formula can be as follows: , (2) Where P is the horizontal resistance of soil acting on the pile in x depth below ground (unit: kN/m); Pu [5] is the ultimate horizontal resistance of soil per unit length of the pile side(unit: kN/m); Y is the lateral deformation of pile in x depth below ground (unit: mm); Y50 is the lateral deformation of pile when the resistance of soil gets to half of its ultimate value (unit: mm), the formula is ; is the compression coefficient of the foundation soil (unit: Mpa-1); B is the width or diameter of single pile (unit: m).
Response of pile group: The reduction factor of response of pile group is described as [4,5]: or (5) Where S is the space between the piles, B is the width or diameter of single pile, x is the depth of calculational point from ground, Y is the lateral deformation of pile in x depth below ground; Y50 is the lateral deformation of pile when the resistance of soil gets to half of its ultimate value.
(2) The method proposed in this paper can be applied to pile groups by the only consideration of the reduction factor of response of pile group.
Online since: June 2014
Authors: Badrul Omar, Lee Guang Beng
The six factors namely (1) energy consumption, (2) machining costs, (3) waste reduction, (4) environmental friendliness, (5) operational safety and (6) personnel health are particularly important in making a manufacturing process sustainable [5].
As for Fuzzy Information Axiom approach, triangular fuzzy number (TFN) can be used to express data in linguistic terms when system and design ranges happen to be stated linguistically.
To show a more realistic application, empirical data collected from the experiments are adopted in this study.
Manufacturing Process Operational Sustainability Safety, Health and Environment Sum Conventional Machining 1.8288 2.6415 4.4702* Cryogenic machining Infinite 0.0000 Infinite HPJAM Infinite 0.7909 Infinite Conclusion A case study that involves three alternative processes is presented to demonstrate the application of crisp and fuzzy AD approach in constructing a hybrid model that assists the evaluation of sustainability performance in terms of machining costs, energy consumption, waste reduction, environmental friendliness, operational safety and personnel health.
Online since: June 2013
Authors: Jie Zhao, Jiang Fu, Yong Fu, Yong Chang Ma
A major issue with the reduced operating temperature is the decrease in catalytic activity of the cathode for oxygen reduction.
The testing data were collected at 10 ℃ interval.
Correspondingly, the TG curve reveals an obvious weight loss (5.2%) which may be associated with the release of the lattice oxygen originating from the reduction of Co4+, the decomposition of the carbonates and the formation of LaFeO3-based oxide.
The almost pure perovskite structure were obtained after sintered at 1200℃ for 4h for synthesized samples comparing the data from XRD with normal feature diffraction lines of LaFeO3.
Online since: March 2018
Authors: Xi Yuan Wang
Energy saving and emission reduction has become one of China's basic state policies [1].
According to the data provided in the carbon footprint mid-term calculation report for wollastonite-based toilets issued by SGS, the carbon emission of a 43kg wollastonite-based toilet is equal to 72.49kg CO2, then it could figure out that while producing 1t wollastonite-based product, it generates 1.6858t carbon emission.
It’s known that it consumes 4,798kW·h electric power to prepare 1.5t calcium sulfate hemihydrate and upon the data provided by NDRC, it could figure out that the coal consumption for preparing 1.5t calcium sulfate hemihydrate is about 1.59933t (=4798÷3000≈1.59933t).
Energy Saving and Emission Reduction Revolutionizing China’s Environmental Protection [J].
Online since: July 2014
Authors: Fei Long Liu
Also provides the method and index of consumer goods reduction, classification of waste disposal, indoor facilities to encourage the use of environmentally friendly products and file management.
According to the relevant data shows, the developed countries generally green hotel can reduce energy consumption by 5% to 10%, saving 10% to 20%, with great economic value.
While energy consumption to produce concrete data cost also tend to stay in the financial department, resulting in consumption and pay for separation of duty.
[2] Lixin Ruan .The hotel industry energy conservation and emissions reduction evaluation method research, in jiangsu province as an example[J].
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