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Online since: May 2011
Authors: Bao Long Zhu, Xi Yong Wu
This results in an increase in pore-water pressure and a corresponding decrease in shearing resistance.
Based on geophysical reconnaissance, muddy water coming from 1# landslide was found.
This phenomenon shows that there was no relationship with surface water erosion,but with the underground water erosion from the inner part of the landslide.
Abundance of underground water and surface water accelerates the tendency of the bedrock terraces to become weaker, which probably induced landsliding.
The variation in natural water content is an indication of the variability of engineering behavior of colluvial and eluvial soils.
Based on geophysical reconnaissance, muddy water coming from 1# landslide was found.
This phenomenon shows that there was no relationship with surface water erosion,but with the underground water erosion from the inner part of the landslide.
Abundance of underground water and surface water accelerates the tendency of the bedrock terraces to become weaker, which probably induced landsliding.
The variation in natural water content is an indication of the variability of engineering behavior of colluvial and eluvial soils.
Online since: June 2014
Authors: Claudinei Rezende Calado, F.A.R. Calado, G. Caput, S.C. Gomes, R.M. Andrade
The image processing algorithms were developed using the Matlab 2010a platform and tested on a PC-type computer with a 2.2 GHz processor, 1 GB of RAM and Windows XP Professional OS; the tests were performed in triplicate.
Table 1: Linear retraction, apparent density, apparent porosity and water absorption data.
Sample Linear retraction (%) Apparent density (g cm-3) Apparent porosity (%) Water absorption (%) Diameter ± Des.
For the 4th sample, the apparent density decreased as the apparent porosity and water absorption increased.
The remaining samples had water absorption values above 3.0%.
Table 1: Linear retraction, apparent density, apparent porosity and water absorption data.
Sample Linear retraction (%) Apparent density (g cm-3) Apparent porosity (%) Water absorption (%) Diameter ± Des.
For the 4th sample, the apparent density decreased as the apparent porosity and water absorption increased.
The remaining samples had water absorption values above 3.0%.
Online since: May 2024
Authors: Laouni Gaidi, Hadj Miloud Meddah, El Bahri Ould Chikh, Boudjellel Moulai Ali, Djilali Bouha, Abdellah Kaou, Athmane Khalifa Bouha
Various polyethylene (PE) pipes are widely used in Algeria to distribute potable water and natural gas in urban areas and water agricultural crops in the countryside.
Currently in Algeria, various polyethylene pipes are joined using traditional methods such as butt welding and electro-fusion welding, along with small and medium-diameter pipe connections used in agriculture and water distribution.
This research aims to maintain an acceptable elongation (relative elongation at break) compared to the base material and to study the effects of quenching by water on structural development and relaxation in the weld-affected zone.
This research will help industry professionals develop pipe collection devices and produce high-quality HDPE welds that reduce the cost of welding operations and shift toward more sustainable manufacturing processes.
Currently in Algeria, various polyethylene pipes are joined using traditional methods such as butt welding and electro-fusion welding, along with small and medium-diameter pipe connections used in agriculture and water distribution.
This research aims to maintain an acceptable elongation (relative elongation at break) compared to the base material and to study the effects of quenching by water on structural development and relaxation in the weld-affected zone.
This research will help industry professionals develop pipe collection devices and produce high-quality HDPE welds that reduce the cost of welding operations and shift toward more sustainable manufacturing processes.
Online since: January 2022
Authors: Sana Khaled, Marjorie Bart, Sylvie Prétot, Florence Collet
The relationship between mud density and water to fine mass ratio is established from fine and water densities as follows:
ρmud=1 + Rw/F1ρF + Rw/Fρw (1)
Where ρmud is the mud density (kg/m3), Rw/F is the water to fine mass ratio (-), ρF is the absolute density of fines (2840 kg/m3) and ρw is the water density (1000 kg/m3).
Mud is left to settle and then excess water is removed (Fig 2).
If too much water is removed, water can be added during the composite production.
Compared to bibliography, the compressive strength of all the produced composites meets the requirements of the French professional rules, making them suitable for use as wall building material (minimal value = 0.2 MPa)(Construire en Chanvre, 2010).
This corresponds to a mass water content about 6%.
Mud is left to settle and then excess water is removed (Fig 2).
If too much water is removed, water can be added during the composite production.
Compared to bibliography, the compressive strength of all the produced composites meets the requirements of the French professional rules, making them suitable for use as wall building material (minimal value = 0.2 MPa)(Construire en Chanvre, 2010).
This corresponds to a mass water content about 6%.
Online since: January 2014
Authors: Yong Jin Liu
When we greet the arrival of a comprehensive “urban age”, we must change the process of trade logistics park ecosystem towards to a more sustainable energy, land, water, materials and environmental protection eco-development model.
According to the main elements of urban ecology, the current ecological challenges of the trade logistics park can be subdivided into the energy system, water system, circulatory system and atmospheric circulatory system.
(3) Provide professional quality storage, packaging, processing, distribution, information services.
We must change the process of logistics park ecosystem towards to a more sustainable energy, land, water, materials and environmental protection eco-development model.
According to the main elements of urban ecology, the ecological challenges of the logistics park can be subdivided into the energy system, water system, circulatory system and atmospheric circulatory system.
According to the main elements of urban ecology, the current ecological challenges of the trade logistics park can be subdivided into the energy system, water system, circulatory system and atmospheric circulatory system.
(3) Provide professional quality storage, packaging, processing, distribution, information services.
We must change the process of logistics park ecosystem towards to a more sustainable energy, land, water, materials and environmental protection eco-development model.
According to the main elements of urban ecology, the ecological challenges of the logistics park can be subdivided into the energy system, water system, circulatory system and atmospheric circulatory system.
Online since: February 2013
Authors: Hao Ran Song
Introduction
Ship manipulation Simulation Manager system involves computer, and simulation, and engineering control, and water dynamics, and ship manipulation and the communications navigation, technology, it is will radar, and ARPA and the navigation features Yu one, has has radar simulation Manager of all features, and equipment has clock depending on King displayed, to displayed day and night and various visibility of depending on King, and a more full of driving Taiwan operation equipment, can intuitive to simulation and displayed in sea or port navigation and the manipulation situation, Simulation can be achieved using ship handling Simulator for training purposes.
International navigation Simulator Association taking into account the STCW78/95 Simulator-related requirements of the Convention and to ensure and improve the quality of simulator training, classification on the Simulator, simulators are divided into four categories, namely: (1) Visual Simulator (Full Mission): the capacity to simulate all the environment, can be ship maneuvering in narrow waterways and water training.
(2) multi-purpose simulators (Multi Task): ability to simulate navigation environment, can be used in restricted waters ship handling training.
Hydrodynamic calculation for simulation of ship navigation by ships. 2) to electronic chart as the background operation waters 3) generation of radar/ARPA images /ARPA image generation system of radar, ARpA and radar images of the training area information,.
The database first by IMO STCW78/95 Convention under or national maritime Council ships crew right any examination and assessment outline under and "about professional and special training examination and assessment outline" of requirements set training project, again application expert system principle imitation avoidance touch expert of thinking (that based Yu 1972 International Sea avoidance touch rules under and expert on rules under of explained), and large real fuck Hou are of data, for fuzzy integrated evaluation, after calculation Hou concluded that evaluation standard data storage in database within, To be compared with the participants practical training.
International navigation Simulator Association taking into account the STCW78/95 Simulator-related requirements of the Convention and to ensure and improve the quality of simulator training, classification on the Simulator, simulators are divided into four categories, namely: (1) Visual Simulator (Full Mission): the capacity to simulate all the environment, can be ship maneuvering in narrow waterways and water training.
(2) multi-purpose simulators (Multi Task): ability to simulate navigation environment, can be used in restricted waters ship handling training.
Hydrodynamic calculation for simulation of ship navigation by ships. 2) to electronic chart as the background operation waters 3) generation of radar/ARPA images /ARPA image generation system of radar, ARpA and radar images of the training area information,.
The database first by IMO STCW78/95 Convention under or national maritime Council ships crew right any examination and assessment outline under and "about professional and special training examination and assessment outline" of requirements set training project, again application expert system principle imitation avoidance touch expert of thinking (that based Yu 1972 International Sea avoidance touch rules under and expert on rules under of explained), and large real fuck Hou are of data, for fuzzy integrated evaluation, after calculation Hou concluded that evaluation standard data storage in database within, To be compared with the participants practical training.
Online since: May 2014
Authors: Chang Wei He, Meng Zhang, Xiao Ping Jia, Yuan Liu
On the feed water pipe of the evaporators of all cold store rooms, there are solenoid valves, which are controlled by relays.
According to the new cold store’s size and reference some professional standards, the total heat load is worked out.
Choosing Condenser On board, water is plentiful and the cold stores are usually equipped with horizontal shell and tube condensers.
When choosing a condenser, the calculation mainly includes the heat exchange area, cooling water flux and the water resistance losing in the condenser.
According to the new cold store’s size and reference some professional standards, the total heat load is worked out.
Choosing Condenser On board, water is plentiful and the cold stores are usually equipped with horizontal shell and tube condensers.
When choosing a condenser, the calculation mainly includes the heat exchange area, cooling water flux and the water resistance losing in the condenser.
Online since: April 2011
Authors: She Yong Lin, Xue Cheng Zhen, Xi Xi He
By the principle of determining the concrete mix proportions, they keep the same total cementitious materials, water, sand ratio, coarse aggregate weight, maximum aggregate size and water-reducer, change the ratio of fly ash replacement only.
Table 1 Concrete Mix Proportion Test series Parameters Material quantity (kg/m3) bc W/B W/C bs Water Cement Sand Aggregate Fly ash Water reducer Polypropylene fiber 0 0% 0.4 0.40 40% 160 400 735 1102.4 0 2.6 2 20% 0.4 0.50 40% 160 320 735 1102.4 80 2.6 4 40% 0.4 0.67 40% 160 240 735 1102.4 160 2.6 F 20% 0.4 0.50 40% 160 320 735 1102.4 80 2.6 9 Note : bc-the ratio of fly ash replacement, bs-sand ratio 2.2.
The specimens were hoisted to the interior by a professional crane company (see Fig.1, 2) two to three weeks before the test.
Table 1 Concrete Mix Proportion Test series Parameters Material quantity (kg/m3) bc W/B W/C bs Water Cement Sand Aggregate Fly ash Water reducer Polypropylene fiber 0 0% 0.4 0.40 40% 160 400 735 1102.4 0 2.6 2 20% 0.4 0.50 40% 160 320 735 1102.4 80 2.6 4 40% 0.4 0.67 40% 160 240 735 1102.4 160 2.6 F 20% 0.4 0.50 40% 160 320 735 1102.4 80 2.6 9 Note : bc-the ratio of fly ash replacement, bs-sand ratio 2.2.
The specimens were hoisted to the interior by a professional crane company (see Fig.1, 2) two to three weeks before the test.
Online since: February 2011
Authors: S.M. Sapuan, E.S. Zainudin, A.M. Fairuz
Table 1: Confident level of material selection for body part
Criteria
Confident
Criteria
Confident
Tensile Strength
5
Impact Strength
0
Tensile Modulus
10
Density
10
Flexural Modulus
10
Water Absorbtion
10
Compressive Strength
0
Material Cost
10
Table 2: Confident level of material selection for rib part
Criteria
Confident
Criteria
Confident
Tensile Strength
5
Impact Strength
10
Tensile Modulus
5
Density
10
Flexural Modulus
10
Water Absorbtion
5
Compressive Strength
10
Material Cost
10
Table 3: Confident level of material selection for stand part
Criteria
Confident
Criteria
Confident
Tensile Strength
5
Impact Strength
0
Tensile Modulus
5
Density
3
Flexural Modulus
5
Water Absorbtion
3
Compressive Strength
10
Material Cost
10
Table 4: Confident level of material selection for beam part
Criteria
Confident
Criteria
Confident
Tensile Strength
5
Impact Strength
10
Tensile Modulus
5
Density
5
Flexural Modulus
10
Water Absorbtion
Koppelaars: Applied Mathematics for Database Professional.
Koppelaars: Applied Mathematics for Database Professional.
Online since: August 2013
Authors: Samion Syahrullail, Tiong Chiong Ing
The public has been made aware that the lubricants used in machines can contaminate the soil and underground water supply.
Non-toxic and biodegradable lubricants have become a major issue especially when the lubricants involve contacts with soil, crops and ground water.
Biodegradability is the ability of a substance to be decomposed by the action of the bacteria into CO2, water, mineral compound and bacterial bodies.
The examples of the fields of application for environmental-friendly lubricants are [6]: outboard two strokes engine oils, chain saw and saw frame oils, hydraulic oils for forest and agricultural equipment, lubricants for sewage treatment plant, water weir plant and lock gate, lubricant for food machinery, metal working and metal forming processes and internal combustion engine and hydraulic system.
Lansdown, Lubrication and Lubricant Selection, Professional Engineering Publishing Limited, London and Bury St Edmund, UK, 2004
Non-toxic and biodegradable lubricants have become a major issue especially when the lubricants involve contacts with soil, crops and ground water.
Biodegradability is the ability of a substance to be decomposed by the action of the bacteria into CO2, water, mineral compound and bacterial bodies.
The examples of the fields of application for environmental-friendly lubricants are [6]: outboard two strokes engine oils, chain saw and saw frame oils, hydraulic oils for forest and agricultural equipment, lubricants for sewage treatment plant, water weir plant and lock gate, lubricant for food machinery, metal working and metal forming processes and internal combustion engine and hydraulic system.
Lansdown, Lubrication and Lubricant Selection, Professional Engineering Publishing Limited, London and Bury St Edmund, UK, 2004