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Online since: January 2010
Authors: Zhi Gang Zeng, Guo Hua Chen
Adaptive Predictive Based on Equal-dimension and New Information for the Hydraulic Mechanism of Wave Motion Compensating Platform Zeng Zhigang 1, 2 ,a, Chen Guohua 1,b 1 School of Mechanical & Automotive Engineering, SCUT.
This will affect normal task even menace safety of the system, equipment, and worker.
The deep-sea mining, laying submarine cable and tube, will be affected by wave motion.
So the target function is:  2 1 2 4 3 0 ( ) ( ) s J w e t w u t w dt w t       (14) Here, 1w , 2w , 3w and 4w are the weights, its values are based on the share of each property adjusted by PID's parameter value estimate system in the regular tuning method.
Parameter setting and calculation The autoregressive forecasting algorithm: the dimension of the equal dimension and new information 100N  ; the autoregressive model's maximum order 30M  ; forgetting factor 0.98 ; damping factor 0.8 ; the forecasting step 6m  .
Online since: August 2013
Authors: Shuai Liu, Qi Jie Ma, Pei Jun Wang
The slots can reduce the axial and bending stiffness of the member and influence its mechanical behavior.
According to Kesti [7], the slots will reduce the transverse bending stiffness of the web greatly and the distortional buckling capacity is affected by the transverse bending stiffness to a great extent.
The initial geometric imperfection and the material property adopted for the verification were based on the tested results.
To consider the effect of distortional buckling, which is not incorporated in the traditional EWM, a reduction factor of 0.85 is introduced into the calculated ultimate strength based on Eq.2.
The slots can reduce the ultimate strength and affect the nonlinear behavior of the cold-formed members.
Online since: August 2013
Authors: Shu Yuan Li, Jian Hua Tao, Lei Yu
The lack of water resources and the deterioration of water environment has become an important restraining factor to the development of society and economy [1,2].
Meanwhile, due to serious over-exploitation of underground water in the basin, serious water pollution problems cross provinces, deterioration of eco-environment, increase of conflicts between resource shortage and regional development water consumption and disputes on water pollution, the economic development in the basin is affected and the effluent sewage discharged into Bohai Bay seriously damages the eco-environment of Bohai Sea waters.
Construction of the integrated management platform of water environment Based on the deep exploitation of information and features of water resources and water environment in the basin and the information technologies such as middleware, database, 3S and numerical simulation and by the exploitation, integration and classification of data resources, an information sharing platform has been developed, which realized the integration and sharing of various information including spatial information of basin, engineering properties, river water quality, rainfall, water quantity and water quality and social economy and based on this, the application system has been developed, which provide business management and decision support for the integrated management processes of water environment in the basin, the system architecture is shown in Fig.1.
Parameter calibration of model. (1) Determination of water quality objective Cs The determination principle of water quality objective generally is to give the corresponding water quality objective and water quality status segment by segment from upstream to downstream of a river and the following factors are considered: I.
A waste load allocation method based on unfairness factors and its application in the Zhangweinan Watershed, northern China[J].
Online since: December 2009
Authors: Xu Yue Wang, Dong Ming Guo, Wen Ji Xu, Ming Kai Lei
Introduction The shrinkage factor of ceramic parts in the processing of sinter roughcast is up to 20% in size [1].
Their physical factors of Al2O3 ceramic are shown in table 1 for selecting milling parameters.
Table.1 Physical factors of Al2O3 ceramic Ρm (Kg/m 3)))) Mass density Tm (K) Melting point Tg (K) Gasifying point C (J/Kg.K) Specific heat Λ (W/m.K) Thermal conductivity 3970 2353 3253 765 36 Results and Discussions Influence of Laser Power on Milling Quality.
In theory, the surface roughness affects the absorption of materials to Resolidified layer Melted zone boundary laser energy, so milling conditions subsequently change due to different milling layers.
References [1] JIA Z X, AI D M, ZHANG Q H: Materials for Mechanical Engineering.
Online since: April 2024
Authors: F.X. Teddy Badai Samodra, Ferian Yavis Pradika, Sarah Cahyadini
Therefore, applying this illusion approach manipulates the area of the environment, which directly affects the user's living.
Due to industrialization and economic expansion, urbanization significantly affects how a local area's land use and land cover (LULC) are changed.
An illusion applied to an architectural design can directly affect the user.
Shelter, security, and property management serve their fundamental purposes, but only with some interruption or even unrest brought on by conflicts over primacy.
Kalibatiene, "The concept of the ideal indoor environment in multi-attribute assessment of dwelling-houses," Archives of Civil and Mechanical Engineering, vol. 11, no. 1, 2011, doi: 10.1016/S1644-9665(12)60176-9
Online since: January 2012
Authors: A. Peigney, Ch. Laurent, Cathy Elissalde, Christophe Drouet, Philippe Miele, Claude Estournès, D. Grossin, M. Maglione, Djar Oquab, Daniel Monceau, Mathieu Boidot, Serge Selezneff, R. Chaim, U Chan Chung, F. Roulland, J. Gurt-Santanach, G. Chevallier, A. Weibel
Their individual nature affects the mechanical, optical, magnetic, thermodynamic, catalytic and chemical properties.
One of the objectives of material scientists is to transpose the specific properties of these divided states of matter to the macroscopic scale.
For the shaping of these objects, the various treatments should not involve their deterioration and/or the loss of the divided state which would imply the disappearance of their specific properties.
In addition to the temperature, one of the factors limiting the traditional sintering of nano-powders, even under pressure, is obviously the duration of the cycle.
Single-wall (SWCNT) or multi-wall (MWCNT) carbon nanotubes have extremely interesting mechanical properties (e.g. low density, – Young's modulus higher than 1.1012Pa).
Online since: February 2014
Authors: Jin Liang Wang, Jia Chen Liu, Hui Qin Chen
Introduction Due to its good properties of high specific strength, high specific stiffness and low density, ultra-heavy plates of high-strength aluminum alloy are widely used in aerospace and weapon industries [1,2].
In order to obtain high strength property, the aluminum alloy thick plate need to be treated by solid solution and aging treatments.
And the feed of die is another important parameter that can affect stress relief of the plates [12].
Sensitivity of material properties on distortion and residual stresses during metal quenching processes.
Mechanism of superiority of fatigue strength for aluminium alloy sheets joined by mechanical clinching and self-pierce riveting.
Online since: July 2011
Authors: Zheng Dong, Da Gui Huang
High detecting sensitivity of the inspector requires high ultraviolet transmission property of the detecting window.
Besides generating audio noise and radio interference, corona and arcing on power lines and substations accelerate degradation of various grid components and can indicate a number of factors which may cause an outage and/or safety issue.
For the inspection and detection of corona discharge on overhead transmission lines, UV cameras are specifically designed for use in power transmission, substations and high voltage applications, these cameras can also detect other sources of UV including leakage from fluorescent lights, tungsten halogen lamps, alcohol and brush fires and can be able to visualize corona in full daylight without being affected by sun radiation.
Quartz Glass Material Quartz glass has special functions as high mechanical intensity, good anti-hotness character, steady chemistry property, and small electric loss.
It has good transmission property from infrared to UV rays, so it is an ideal optic material and widely used in microelectronics and precise optics.
Online since: September 2024
Authors: Sheng Zheng Ji, Zhuang Song, Ying He
Model Validation Tortuosity is an important parameter to describe the properties of porous media, and many scholars use it to evaluate the diffusion properties of GDL.
Improvement in physical properties of single-layer gas diffusion layers using graphene for proton exchange membrane fuel cells[J].
Pore-scale modeling of gas diffusion layers: Effects of compression on transport properties[J].
Anisotropic transport properties of gas diffusion layerbased on pore-scale model[J].
Microstructure reconstruction of the gas diffusion layer and analyses of the anisotropic transport properties[J].
Online since: June 2020
Authors: Joaquim Simão, Nuno Leal, Carlos Galhano
Six Portuguese magmatic ornamental stones were submitted to Soxhlet experiments during 10,000 hours (approximately 416 days) in order to evaluate how the rain water affects the rock behavior as a dimension stone.
They also allow the identification of the way that factors like mineralogy, texture, original state of degradation, climate condition and atmospheric pollutants contribute to mineral instability, and thus may change the physical characteristics and mechanical properties of rocks.
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