Search results

Since 21st century, the rapid development of science and technology has brought about the massive environmental destruction, such as the air pollution, water pollution, the abnormal change of the global climate and the ozone depletion; these problems cause the concern and attention of scientists all over the world, and the environmental protection has become the urgent and serious problem that human beings are facing.
The water pollution caused by the enterprises.
Due to the illegal sewage from the enterprises, the major rivers all over the country have lost the function of the drinking water.
In the national system of seven major rivers, 40.9% of rivers have become the five kinds of worse water quality of the rivers which has lost the water function; 75% lakes are characterized by eutrophication. 3.
Before investing the project, the enterprise shall qualify various indicators of the investment projects and determine the corporate impact on the environment, and finally make the environmental evaluation on the investment feasibility, including the potential environment problems and the due professional care caused by the evaluation and recognition; for instance, what are the substances and wastes which are harmful to the human health or environment. (2) Review the cost benefit of the corporate environment, and implement the concurrent audit on the corporate environment liability.

Introduction The sustainable development of water and green environments has become the core goal of space management in the Yilan area because water and green spaces are the most important environmental resources in the Lanyang Plain.
This will be of great benefit to the resources of the conservation of the water environment in the Lanyang Plain.
Research Method We consider, based on the evaluation specification of ecological corridors in the Yilan areas [5], what the expertise of professional space designers in Taiwan can do for the river ecological corridor.
The bankfull area is the space water passing through during non-flood peak period, while the floodplain area is the buffer space for water level change during the flood peak period.
Ho, Study of green building indicators on water green environment of farmhouses in paddy fields in Yilan (II).

Grossman and Krueger analyzes the change situation of 14 kinds air pollution and water pollution material in 66 countries from 1979 to 1990.
The current application of EKC model focused on the relationship between income and air quality, water quality, urban waste emissions, energy forest yield which get better fitting of EKC curve.
With the application of large numbers of agricultural film, the environmental problem has becomes more and more serious. 2.1The growth of crops inhibited by residual film The main composition of agricultural film materials is polymer compounds, in the natural conditions, these high polymer is difficult to decompose, if be retened long-term in the ground, it will affect soil permeability root growth of the crops, and prevent soil water migration ,leading to crop failure.
Residual film has very significant effect on soil physical properties such as the bulk density and specific gravity of soil will increase with the increasing of residual film quantity and the porosity and water content in soil will decrease with the increasing of residual film . 2.2The influence of field operation by residual film Residual film was discarded in the chief field, stored up in drainage channel, scatted on lake water or hanged in the branches or rod head disorderly, which becomes an important symbol of the white pollution.
In recent years, Hebei vegetables industry is shifting from the extensive traditional mode to the intensive modern mode .The specialization of vegetable production is coming along with the intensive land and scale management. adding up with the development of agricultural professional cooperatives.

Tap water was used for cooling, as it could be in practice.
The hydrogen release is due to bubbles on the surface of the water.
It is also necessary to provide for late monitoring for the third-fourth stage at the fire initial stage [22, 23], when combustion products enter the airspace, for the earliest possible involvement of professional firefighting measures.
Taking them into account, standard water-based fire extinguishing agents are not fully suitable for directly stopping the such batteries burning: water jets [24], foams [25, 26], water-based gels [12, 27].
Flaming can be stopped by spraying water, a inhibitor cloud, or non-flammable gas while simultaneously dousing the battery with water taken in excess.

For deep water subsea, all seals experiencing hydrostatic pressure should have bidirectional capability [1].
In monophase flow pressure surge, frequently called a water hammer, may be caused by a pump shutdown or a closed valve.
References [1] Bai and Bai, Subsea engineering handbook, Gulf professional publishing, 2012, section 21.3
[2] Guo, Song, Chacjo and Ghalambor, Offshore pipelines, Gulf professional publishing, 2005, p. 121 [3] ASTM SA-182/SA182M Specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high –temperature service, 2008A, section 5.4
[22] Ingolf fra Holmslet, private comunications, Dec 12, 2012, ingolf@valve.no [23] NS-EN 12266-1:2012 [24] Bai and Bai, Subseqa engineering handbook, Gulf professional publishing, 2012, p. 392.

At the same time, atmospheric transmittance of infrared radiation is an important parameter which measures the atmospheric transmission attenuation effect of infrared radiation, and it has important impact on the design, performance and evaluation of infrared system, e.g. tracking system, searching system, warning system and thermography system et al. [1] Now, there are two kinds of commonly used methods for calculating atmospheric transmittance [2]: one is the method of exact calculation using the professional atmospheric analysis and calculation softwares, such as Modtran and Lowtran; the other one is approximate calculation using theoretical approaches and empirical formula (algorithm of empirical formula).
Atmospheric attenuation mainly includes [7]: 1) absorption attenuation caused by molecules in the atmosphere (mainly including water vapor and carbon dioxide); 2) scattering attenuation by aerosol particles in the air; 3) particular weather conditions (such as snow, rain and fog et al.).
Therefor the total atmospheric transmittance can be calculated by the following formula: (1) Wherein tH2O(we) and tCO2(Re) are atmospheric transmittance arising from absorption attenuation respectively caused by water vapor and carbon dioxide respectively, tH2O(we) can be obtained by looking up the table (spectral transmittance of water vapor at horizontal path above sea-level) with we converting from precipitable water w; tCO2(Re) can also be obtained by looking up the table(spectral transmittance of carbon dioxide at horizontal path above sea-level) with Re converting from the R which is horizontal distance; And DV is atmospheric visibility, Jrain is rainfall intensity, Jsnow is snowfall intensity, wl is wavelength.
Steps of calculating atmospheric transmittance arising from absorption due to water vapor (H2O): 1) Firstly, in order to obtain w0 (condensable vapors per kilometer in 100% relative humidity), looking up the corresponding table with atmospheric temperature T. 2) Then calculating the precipitable water w which equals to the product of distance R, relative humidity Hr and w0. 3) Performing the correction of precipitable water, i.e. converting w into the equivalent precipitable water we in the surface layer. 4) Finally, looking up the corresponding table for tH2O with the parameters including wavelength wl and precipitable water we.
System functions shown in the GUI mainly include: calculating atmospheric transmittance with the appointed wavelength, plotting atmospheric transmittance of water vapor and carbon dioxide curves, drawing simulated images in the infrared band and calculating atmospheric transmittance of infrared radiation with rainfall or snowfall intensity in particular weather condition.

But these monitoring information are mostly from every single subject, a single professional monitoring information is hard to really reflect the overall security situation[1].
In addition, because of the influence of the surface climate, human activities and regional water system changes, tunnel project structure also corresponding produces a sensitive reaction.
The various parameters on the surface may have not much relation, but when the event will occur (water gushing and large deformation or landslides), these parameters will show a similar abnormality.

For example, select an open or compact size according to the climate zone of the building site; make full use of building surrounding features and its own characteristics to determine the layout of the building; make a full use of solar energy, geothermal energy, wind energy, water, heating, and electricity to solve the construction requirements; use natural light, natural ventilation to reduce artificial lighting, air conditioning; pay attention to the use and recycling of water resource; used mainly local techniques and materials and choose some new material and new technology suitable for local use.
Of course, as a systematic engineering, the design of the university libraries needs not only the effort of the architectural design staff but also the cooperation and participation of various professional personnel to reduce waste and regret.

We consider that the wastewater input is an important source of the heavy metal pollution in Huoshaogou wetland, and Cr is the main contribution from the water.
Alloway, Heavy metals in soils, Blackie Academic and Professional, London, 1995
Chen, Concentration and assessment of heavy metals in surface sediment in the lower reaches of Huoshaogou, Xining city, Research of Soil and Water Conservation 20 (2013) 247-250 (In Chinese)

For the flow field data and noise power level data capture, in this paper we use user-defined function UDF of FLUENT to achieve, the concrete programming is as follows: #include "udf.h" #define BMODULUS 2.2e9 #define rho_ref 1000.0 DEFINE_PROPERTY(water_speed_of_sound,c,t) {real a;real p, dp, p_operating; p_operating = RP_Get_Real ("operating-pressure"); p = C_P(c,t); dp = p-p_operating; a = (1.
Through calculating by the FLUENT of CFD professional software, we obtained the residual convergence curve as shown in Figure 4.
Experimental study on noise characteristics of water hydraulic piston pumps.