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Solar energy resource of hot summer and cold winter regions is above class III, so solar energy resource is available in these regions, solar water heating technology should be applied in accordance with local policy, and solar photovoltaic technology should be tried in application.
Active Building Energy Efficiency Technology in Hot Summer and Cold Winter Regions Active measures means to control building indoor ecological environment effectively through mechanical and electrical equipment, including indoor thermal environment adjustment and control of water resource utilization, etc., based on the various aspects of measures on control of temperature and humidity, energy-saving lighting, water treatment, energy-saving lighting and integrated intelligent control, the goal of build a comfortable, energy-saving building can be achieved, and the building's impact on the environment can be reduced.
Radiation air conditioning system achieves heat exchange through chilled water or hot water radiation, it is used for heating in most cases, and now radiative cooling technology is also put in use gradually in some areas.
Through professional experience judgment, numerical simulation and accumulation of actual case, this section will compare from the popularity of technology, energy saving effect, initial investment so as to provide reference for the region selection of technology system.
Besides, with the increasing maturity of the technology popularization, its cost will gradually decline and show a better market potential; analyzing from the climate adaptability, underground water source heat pump is very suitable for hot summer and cold winter region, whose shallow geothermal is relatively rich.

It is an anthraquinone derivative, mainly existing in the lac insect body, which can be washed out by water in the lac processing due to soluble in water, and then fine processing [1].
Chemical Reagent Factory); pure water: self-prepared in laboratory 1.2 Instruments and equipments DU 800 UV - visible spectrophotometer (U.S.
Beckman Coulter); CPC-505(SMART); Professional pH / Conductivity / Ion / Dissolved Oxygen Meter (SMART); AB204-S Precision electronic balance (Mettler Toledo (China) Limited) 1.3 Method 1.3.1 Determination of the lac dye and ascorbic acid on DPPH· scavenging activity Prepare the DPPH· ethanol solution of mass concentration 39.40μg/mL, appropriate mass concentration of lac dye solution and ascorbic acid solution.
AVC0 is the absorbance of the mixed DPPH· ethanol and pure water solution; AVCi is the absorbance of the mixed DPPH· ethanol and ascorbic acid solution.
A0i is the absorbance of the mixed solution of 2mL Tris-HCl buffer, 1mL pure water and 1 mL pyrogallol solution; ARLi is the absorbance of the mixed solution of 2mL Tris-HCl buffer, 1mL lac dye and 1 mL pyrogallol solution; AVCi is the absorbance of the mixed solution of 2mL Tris-HCl buffer, 1mL ascorbic acid and 1 mL pyrogallol solution.

This paper, starting from the professional point of view of turbine governor and according to various data in the test, presents a preliminary analysis of results in combination of various tests competed after Xiaowan Power Station 700MW hydropower unit speed governor was put into island mode operation after the Chu Hui direct current line was off-stream (trial).
All these require dynamic testing and analysis of the real machine. because there is no previous experience to follow for control strategy, control algorithm and control parameters of turbine speed governor in this operation mode, the professional team on speed governor of the State Grid Electric Power Research Institute has cooperated with the technical team Huaneng Lancang River Hydropower Co., and they have done a lot of useful attempt and exploration and has achieved initial success in the second phase of the trial (DC power 1600MW). 3.
The correspondence between no-load opening and head of Xiaowan Power Station is as follows: Table 1: The no-load opening which matches the seven heads Governor of Xiaowan Power Station Water head (m) 150 181 199 216 227 239 251 No-load opening (%) 22.5 17 16 15 14 13 12 In the power state of the speed governor and in the mode of connecting to the big gird, the dead zone is set to ± 0.05Hz.

The water content of the green body is controlled at13.2%, and then the green body maintains 2-hour insulation at 1190 ℃ in the air.
The practice shows: ①SrB2Si0.67O5.34 insoluble in water is in a liquid state under the condition of 900 ~ 1200 ℃.
In the production process, because the added H3BO3 or B2O3 will be fully soluble in water, H3BO3 or B2O3 dissolved in water will be lost with the water after slurry treatment, forming water and other production process and only very small amount of B3+ can get actual access to the products, while SrB2Si0.67O5.34 insoluble Water is conducive for the enough B3 +to replace Fe3 + of the octahedral crystal position in magnetic lead stone structure as pre-designed so as to improve the material MS; ③ Adding appropriate amount of Si element can inhibit the grain growth and refine the crystal particles, which is beneficial to improve HCJ of the sample; ④ at the phase of sintering, SrB2Si0.67O5.34 in a liquid is wrapped around the grain boundaries, which can reduce solid state reaction temperature of permanent magnet ferrite, refine the crystal grains and improve HCJ of the sample; ⑤liquid SrB2Si0.67O5.34 can be easily coupled with CoFe2O4 (≥ 5000 Gs, high remanence) and calcium lanthanum permanent
Mianyang: Magnetic Materials and Devices Professional Intelligence Network, 2003:74-254.

However, deformation of the dam is larger and larger with the height of CFRD increasing under the high water pressure after water storage.
Compression damage of face slabs occurred when the water level was close to the normal storage level in Brazil Barra Grande CFRD (dam height is 185m) [7].
The water level was 300m and the thickness of face slab is 0.3+0.0035H.
Wei: Yunnan Water Power, Vol. 20(2004) No.1, p.56-58.
(In Chinese) [6] Chinese Society of Hydroelectric Engineering, Professional Committee of Concrete Face Rockfill Dam: Safety monitoring technology practice and progress of Concrete Face Rockfill Dam(China WaterPower Press, China 2010) (In Chinese) [7] L.

Moreover, to assess the renewable energy technology, Evans [10] proposed a number of indicators, like price of electricity generation, greenhouse gas emissions, availability and technological limitations, efficiency of energy generation, land use, water consumption and social impacts.
This method is often used by academics and professionals to decompose a complex problem into several sub-problems by analyzing the several relevant criteria [13].
Darwish, Multi-criteria sustainability assessment of water desalination and energy systems - kuwait case, Desalination and Water Treatment 25 (1-3) (2011) 241–250.

Problem Many educational institutions, particularly in developing regions, face significant barriers to implementing such solutions due to the prohibitive cost of professional-grade scientific instrumentation [1].
The sensor operates using a seesaw system, which allows the amount of water collected to be counted using a channeling structure (funnel) with an inlet area of 95 cm².
· Epoxy coating to protect all parts exposed to water and humidity.
Enhanced Sensor Accuracy and Expansion · Improve the precision of the rain gauge and anemometer through professional calibration and refined measurement algorithms[23]
A solar-powered, internet of things (IoT)-controlled water irrigation system supported by rainfall forecasts utilizing aerosols: a review.

The enhancement of the waterfront must begin under the water to be effective, through the restoration of the marine habitat.
It's to be stressed that the water helps to connect, physically and metaphorically, the five districts and its inhabitants.
The water is always present as a fundamental element in the vision and in the projects – the previous Mayor Bloomberg used to say that water is the sixth district of New York City.
Finally, also economic operators have a metropolitan vision of the market potentialities that is composed by water and mainland.
Malone: City, Capital and Water, London and New York, Routledge (1996) [12] H.

However, liquid crystal is known to be hazardous to water (water contamination class II) and very difficult to biodegrade [4,5,6].
Gabi 4 developed by a Germen company called PE-INTERNATIONAL is a professional LCA analysis tool.
As shown in Table 3, the maximum usage is water with 1000 ml which provide heat energy for reduced pressure distillation.
The study assumes that the repeated utilization ratio of water is 80%.
Another 1000ml water is used to clean the glass substrate which cannot be recycled.

Introduction of Application Software The software of ORBIT ONSHORE is developed by DNV (Det Norske Veritas) and quantifies professional software of RBI based on technology of risk assessment.
Corrosion of acidic water is the corrosion led by hydrogen sulphide and ammonia in the water.
The factors affecting corrosion of acidic water are the density of NH4HS in the water and flow rate of medium.
The secondary factors are PH value of water and content of cyanide and oxygen in the water.
The hydrogen atom in carbide is from the corrosion reaction of wet H2S and the permeability of hydrogen atom is mainly related to two environmental parameters-PH value and H2S content in the water.