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Study on the Relationship between Contamination Distribution and Sampling Density Xiao-Song Sun1, An-Ping Liu2,a, Xiao-Nan Sun2, Wei-Guo Tang3 and Jian-Ming Sun2 1College of Mechanical Engineering, Chongqing University, Chongqing 400030, China 2Institute of Environmental Physics, Chongqing University, Chongqing 400030, China 3 Chongqing YURONG Water Engineering Co.Ltd, Chongqing 402460,China aliuanping@cqu.edu.cn Key words: System layout method, Contamination distribution, Sampling density Abstract.
For the horizontal layout of sampling points in the site environmental monitoring, common layout methods of monitoring points include simple random layout,professional judgement layout, partition layout and system layout method etc.
Table1 Common layout methods and their applicable conditions Layout method Applicable conditions simple random layout Well-distributed contaminated sites professional judgement layout Sites with definite potential-contaminants partition layout Sites with known contaminated distribution condition but inhomogeneous contaminated distribution system layout method All kinds of sites, especially the sites with unknown or large-range contaminated distribution.

This system took the land use change of Du'an Yao Autonomous County in Guangxi as the research object and considered the land use change and optimal regulation professional analysis model as the core to resolve the problems lying in information processing technologies such as the land use change and optimal regulation data analysis, query, display, and management based on related spatial data and information so as to extract "information" from "data".
It aimed at providing professional geographic information system software to realize information sharing developed based on the ArcEngine technology to complete land use spatial data management, spatial temporal evolution analysis, driving mechanism analysis, benefit evaluation, land degradation warning, land change prediction simulation, and decision support for the Karst area of Du'an in Guangxi. 1 Database Technology 1.1 Spatial Data Model- Geodatabase Geodatabase data model adopted the standard relation-object database technology in realization.
(7) Optimal regulation analysis: Based on the sustainable utilization evaluation results gained in (5), the data in the existing land sustainable utilization optimal regulation mode database was compared to select the suitable regulation modes or further optimize the regulation modes. 3.4 Database Design 3.4.1 Spatial Data (1) Basic map data: The basic map data included the administrative division, township boundary, residential area, transportation, water system, topographic map, special landform (rocky desertification distribution), and etc.; (2) Thematic map data: The thematic map data included the distribution of water resources, land resources, forest resources, and energy resources; (3) Remote sensing image data: The remote sensing image data included the TM image data of Du'an in 1977, 1988 and 1999 and the SPOT-2/4 image data in 2005. 3.4.2 Non-spatial Data (1) Resource data: It included the climate resource and weather, water resource, land resource, geological and mineral
resource, biological resource, agricultural resource, forest resource types, regional division, and etc.; (2) Environmental data: It included the atmospheric environment, water environment, geological environment, soil environment, agricultural environment, sound environment, and etc.; (3) Disaster data: It included the flood disaster, meteorological disaster, earthquake disaster, agricultural and biological disaster, forest calamity, environmental disaster, and etc.; (4) Population and socio-economic data: It included the population, comprehensive economic, social development, and etc
Summary This paper combined the case study of Karst’s land use change and spatial decision support system to introduce the key technologies used by the system, proposed the system design solutions, made detailed analysis from the perspectives of overall design idea, system function, system structure, database, model base, knowledge base, method base, and man-machine interface, and established the special geographic information system with the land use change and optimal regulation professional analysis model as the core to provide positive support and help for the effective management and research for national department in decision and land use aspects.

Finally, The saccharolytic capability of S. mutans was examined using bovine teeth that had been pretreated with CXE (1%), Xylitol (1%), CXE+Xylitol (1%), chlorhexidine (1%) and distilled water, and rinsed with distilled water.
mutans on bovine teeth revealed that distilled water and Xylitol could not inhibit bacterial fermentation.
The substantive antibacterial activity on the tooth surface was compared using a protocol that cleaned bovine teeth pretreated with 100 � of CXE (1%), Xylitol (1%), CXE+Xylitol (1%), chlorhexidine (1%), and distilled water for 10 minutes followed by rinsed with distilled water by Vortex for 20 minutes.
The evaluation of the saccharolytic capability of S. mutans using bovine teeth revealed that Xylitol and distilled water changed the indicator to a yellow color, which indicated that they could not inhibit bacterial fermentation.
Saccharolytic capability of S. mutans (CHX: chlorhexidine 1%, DW: distilled water, CXE: Curcuma xanthorrhiza extract 1%).

The device risks are an efficiency of machinery and equipment, water pump usages, lighting system and air condition system.
The inverter, which is used to control motor in water pump usages, also reduce the risk of electric energy consumption.
Prepare and summary report of the annual risk management to the board, chancellor, and member chief executive officers and develop for provide professional training opportunities risk management personnel utilizing system and outside expertise.
The device risks consist of the efficiency of machinery and equipment, water pumps, lighting system and air condition system.
The later priorities are the ratio of energy consumption per production unit and water pumps system respectively.

The influence of the very fine fraction of spongilites in building binders has scarcely been studied so far and there is almost no professional work on this topic.
Mortar mixtures were prepared using the constant water/binder ratio of 0.5 and binder/aggregate volume ratio of 1:1.
One cycle consisted of 6 h freezing at −20 °C and 12 h thawing in 20 °C warm water.
The improved frost resistance of spongilite mortars can be due to their lower water absorption.
Total porosity, water absorption and frost resistance coefficient (Df) of mortars.

The crystalline mixture of natural gas and water forms the hydrates.
The flow stratified regime and thermodynamic conditions arrive and gas is dissolved in the water phase that forms the hydrate.
It is assumed that the hydrate shell temperature is the same as the hydrate water interface.
The heat transfers through the water phase and forms a hydrate in the deepwater pipeline.
USA: Gulf Professional Publishing an imprint of Elsevier Science, 2003

Study on Stability of Subgrade Slope along River Subjected to Water Level Fluctuation and Stream Erosion[J].
Quasi-static Analysis of Seismic Stability of Anchored Rock Slope under Surcharge and Water Pressure Conditions[J].
(In Chinese) [11] The Professional Standards Compilation Group of People’s Republic of China.
Beijing: China Water Power Press, 2007.
Improving on Assumption for Water Pressure Distributing on Failure Surface in Rock Slope[J].

Introduction With the aim at reducing the problems associated with water penetration, cavity walls were developed in the UK in the 19th century.
Water that would seep inside the outer (external) wall would then run down that wall, while the inside wall would remain dry.
It was found that these blocks could support a heavy load such as a roof or floor, help reduce problems with water penetration and building insulation.
This problem has not been properly addressed in the past and it becomes challenging for researchers and professionals to gain insight of the structural response of new in-plane loaded masonry walls.

Table 1: Dosages of the investigated specimens of concrete Type of sample Cement [kg] Sand [kg] Gravel [kg] Water [kg] 1 420 588 882 168 2 420 588 882 210 3 420 588 882 252 A type of cement (CP V) commercially available in Brazil was used.
According to Table 1, it can be verified that three different types of concrete samples have been molded, the only difference between them was the quantity of water in concrete.
It has also been verified that the higher the amount of water in concrete is, the lower the electrical resistivity is too.
It is know that the higher the amount of water in concrete is, the higher its permeability also is [9].
Monteiro, Concrete: Microstructure, Properties and Materials, third ed., McGraw-Hill Professional, 2005.

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Water Res. 44 (2010) 3147–3165
Ding, Nanotechnology for Environmental Decontamination; McGraw-Hill Professional: New York, NY, USA, 2011; ISBN 0-07-170279-2
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Water Res. 42 (2008) 4591–4602