Search results

Due to the disintegration of the hydrate, the pore water pressure fluctuates and the formation water content increases once the drilling fluid enters the hydrate reservoir under the impact of temperature differences and filtrate.
Deionized water was provided by our laboratory equipment.
The filtration loss of water-based drilling fluid has a significant impact on wellbore stability, particularly in loose, fractured, or water-sensitive rocks.
In addition, the wellbore strengthener can help to reduce water-based drilling fluid losses.
Gulf professional publishing, 2011

Despite railways being a statistically safe form of transportation (due to guidance per rails, professional drivers, etc.) rail accidents may still happen.
The systems considered in the analysis in the railway tunnel system are: 1) Telecommunications equipment; 2) Signaling system; 3) Systems of light and driving force; 4) Electric traction; 5) Water system – fire; 6) Ventilation; 7) Security system and 8) Supervision integrated.
Table 3: MTBF results Subsystem MTBF (h) Telecommunications equipment 1000 Signaling system 3600 System of Light and Driving Force 100 Electric traction 10000 Ventilation 1600 Water system – fire 4000 Security system 1200 Supervision integrated system 1400 The resulting values for MTTR and MDT for each subsystem and for the gallery system as a whole are shown in the following Table 4.
Table 4: MTTR e MDT results Subsystem MTTR (h) MDT (h) Telecommunications equipment 2.00 4.00 Signaling system 1.12 3.12 System of Light and Driving Force 0.51 2.51 Electric traction 2.17 4.17 Ventilation 1.55 3.55 Water system – fire 1.33 3.33 Security system 1.79 3.79 Supervision integrated system 0.53 2.53 The value of MTBF for the fault conditions of normal operation has been calculated by means of DBA, obtaining a MTBFC = 250.000 hours calculated by DBA.

The experimental results show that the system realizes effectively automatic saving water irrigation, and it is economical and practical.
If the planter does not water the plants and flowers timely and scientifically, it will cause malnutrition and even wither to death.
Control mode is simple, irrigation water supply is mostly based on the soil moisture regulation and the effect of soil temperature on plant flowers is ignored. 3.
The experimental results show that the system realizes effectively automatic saving water irrigation, and it is economical and practical.
Water Environment Monitoring System Based on Zigbee Wireless Sensor Networks.

Only in the case of sheltering from wind and gathering water together, we can get “living gas”.
Design Psychology is a theory of professional design which designers must master.
And gas place should be: shelter from wind and sunny, beautiful, gurgling water, vegetation, birds flying and singing, the joy of spring, flowers of the land.
In traditional Feng Shui, the emphasis is mountains surrounding and water holding; it’s glad to see perfect sand but avoid direct mountain and reflecting water.

The guideline includes the overall planning, energy, water, building materials, indoor air and innovation plus six, a total of 41 indicators, score 69 points.
Japan's "symbiotic housing AZ" takes only two options which is whether or not the qualitative indicators and quantitative indicators in the form of combination, so the owners, users and other non-professional staff is extremely friendly, and increase the flexibility and operability assessment .
Table 1 Three kinds of representative evaluation system evaluation system objects Provision Score / weight / results BREEAM UK l commercialbuildings l residential l shopping malls, supermarkets l Industrial Building l management l energy l health and comfort l pollution(air,water) l transportationland use l address the ecological value of l materials l water consumption and efficiency l each of the terms are scoring, scores unified l cumulative weight get out of l divide "through", "good", "very good" or "excellent" four grades l Certified l regular updates l put into use after more than 25% of new buildings certified by the assessment l LEED l USA l Commercial buildings l residential l site l energy l water l materials l indoor environmental quality l There are different terms for each score l Users can choose the terms used to scoring l prerequisites must be met l be cumulative score, divided Certification Level l renewed every three years l GBC2000

Table 2 Evaluation parameter table of quantitative characteristics Comprehensive evaluation (value) Criteria evaluation (value) Factors evaluation Value (approximate) Characteristics of structural planes (100) Structural planes features B1 (80) Extension length C1 14.6 (14) Strength of surface C2 37.9 (38) Roughness C3 2.5 (3) Waviness degree C4 4.8 (5) Opening degree C5 6.0 (6) Filling C6 14.2 (14) External environment B2 (20) In-situ stress state C7 16.0 (16) Underground water state C8 4.0 (4) Note: The values are slightly adjusted based on the original weight in order to keep brief to use and easy to memory.
10 10~20 >20 Classification standard 14 8 6 3 1 Table 4 Classification of surface strength Point load strength (MPa) >10 4~10 2~4 1~2 <1, not recommended Uniaxial compressive strength (MPa) 250~100 100~60 60~30 30~15 15~5 Classification standard 38~26 25~21 20~16 15~11 10~0 Table 5 Classification of roughness Roughness Very Rough Smooth Striation or mirror face Classification standard 3 2 1 0 Table 6 Classification of waviness degree Waviness degree Step shape Sawtooth shape Wave shape Straightness Classification standard 5 4 3 2 Table 7 Classification of opening degree Opening degree (mm) Closed <0.1 0.1~1 1~5 >5 Classification standard 6 5 4 1 0 Table 8 Classification of fillings Fillings (mm) No fillings <5 (hard) >5 (hard) <5 (soft) >5 (soft) Classification standrad 14 8 5 5 1 Table 9 Classification of in-situ stress state In-situ stress state Extremely high High Medium Low, near the ground surface Classification standard 16 12 10 8 Table 10 Classification of underground water
Under ground water state Arid Moist Humid Drip Flow water Classification standard 4 3 2 1 0 The structural planes classification scores and strength parameters are obtained in Table 11 after synthetically consider the peak shear strength partition criterion of structural planes in some industry professional standards.

OWC terminators capture water from an opening in to a partially submerged platform and let that water rise in an air column.
The hydrodynamic force on the heaving buoy is calculated by: (2) Where is the density of the water, is the main mass water plane area, is gravity acceleration, is the frequency of regular wave, is the phase of the regular wave.
Simulztion Ansys Maxwell is a professional software of electromagnetic analysis, the simulation of electromagnetic force were done with it.

Different amounts of copper were dissolved in distilled water to prepare copper solutions.
After stirring for 1 h, the doped photocatalyst solutions were then put in a water bath at 80oC to remove the solvent followed by 12 h of drying in an oven at 120oC.
Speight, Handbook of industrial hydrocarbon processe, Gulf Professional Publishing (2010)
Hydrogen production from methanol/water decomposition in a liquid photosystem using the anatase structure of Cu loaded TiO2, International Journal of Hydrogen Energy, 32 (2007) 3841-3848
Li., Copper and Iodine co-modified TiO2 Nanoparticles for improved activity of CO2 photoreduction with water vapor, Applied Catalysis B: Environmental, 257 (2012) 123-124

Aerobic composting is the biochemical process which is relied on professionals and facultative aerobic bacteria degrade organic matter.
Water, Air and Soil Pollution, 2001, 126: 1~12

But the development of cloud computing is not mature, the existing hidden security dangers become the main problems the broad professionals concerns.
The cloud is just like running water, electricity, coal gas that billing.