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A 24 hours of continuous observation was made for a prestressed concrete cable-stayed bridge constructing, which with one pylon and single cable plane, the 14000t rotational weight, 70.4° rotational angel, and the 98m cantilever girder. On the basis of measured data, the PC cable-stayed bridge temperature effects inherent law in the high latitudes cold region was studied, using the finite element...
In this study, the land surface temperature (LST) from Moderate Resolution Imaging Spectroradiometer (MODIS) sensor which was chosen as one scalar temperature directly modifying light use efficiency (LUE), together with the 8-day composited MODIS data and the site measurements of photosynthetically active radiation (PAR) of a subtropical evergreen coniferous forest ecosystem in southern China during...
In-situ stress is a natural stress existing in earth crust and isn't disturbed yet by mining, which is the fundamental force to cause deformation and failure in mining and other underground works. To study the stability of surrounding rock in the 8th mine of Pingmei group, overcoring technique with complete temperature compensation technique and improved hollow inclusion strain devices were used in...
Concrete cracking is a key issue in the project of water transfer. In present study, with the calculation and analysis the concrete structure of aqueduct both with and without the measure of heat insulation under the weather condition of cold wave in service life, the distribution of thermal field and thermal stress field and the probable cracking area are presented. The simulation results indicate...
Based on one 160m PC bridge project, the field measurement and finite element analysis of the hydration temperature of cast-in-situ box girder on top of pier have been completed. The distrabution of the hydration temperature fields and the rule of the temperature changing with time have been sumed up in this paper. The factors which affect the hydration temperature of cast-in-situ box girder on top...
Balcony greening have the ecological effects on reducing temperature and increasing humidity,purifying air and beautifying environment etc. Combined the experiments with simulation, by figuring out the potency of reducing temperature and increasing humidity of balcony greening on indoor thermal environment, the correctness of the model was verified. The results show that the temperature of the greening...
Based on the SPOT VEGETATION NDVI data, the spatial-temporal variations of vegetation cover in Hexi region of Gansu province were analyzed by using the MVC (Maximum Value Composites) method and the linear regression analysis during 1999 to 2009, the NDVI change trends and characteristics of different land use types were extracted. According to the results, during the last 11 years, the vegetation...
A modified oxidation ditch process is applied in a full-scale municipal wastewater treatment plant. Compared with the conventional oxidation ditch, the modified oxidation ditch adds some microporous aerators to improve oxygen utilization. The measures bring about a further improvement of nitrogen and phosphorus in the urban wastewater. The monitoring results for one year show that the influent concentrations...
[Objective] This paper focuses on analyzing the energy resources and precipitation trends to the context of global warming in the western Liaoning Province in recent 60 years, where located in the northern hemisphere. Provide the basis study for the adjustment of agricultural structure and full use of energy resources. [Method] Use meteorological data of three cities in western Liaoning Province during...
The cooling metering of fan-coil units plays a key role on the charging of cooling supplying in the central air conditioning systems, which improves the energy efficiency of systems and decreases the controversies between the owner and the user. In order to achieve both of accuracy and affordability on metering, a new metering method is proposed by analyzing the principle and application of water-side...
Firstly, we have built the physical model of spinning workshop in this paper. Using the physical model, the temperature field, velocity field and PMV—PPD at different height in the whole workshop has been simulated by Airpak software and whether the result is reasonable has been analysed. Meanwhile, we have measured the real temperature and velocity distribution at different height in the whole space...
Mineral processing wastewater of sulfide ore containing dressing pharmacy such as residual xanthate, resulting in many mine ecological deterioration, serious water and soil pollution, human health, agricultural production and fisheries caused great harm, could easily lead to environmental pollution. Therefore, effective method to remove the residual xanthate of mineral processing wastewater no doubt...
Using hydrochloric acid and rare earth polymer coagulant mixing heating method, to prepare of a new type of rare earth polymer coagulant polymer coagulant (PRE). Through a single factor and cross experiments to find the best prepare conditions: the concentration of hydrochloric acid 2mol / L, reaction temperature 100°C, the amount of rare earth added 10g, reaction time 6h. Yellow River water for example,...
Four scenes of Landsat TM images which were obtained on September 15th, 1988; September 11th, 1998; September 1st, 2006 and August 24th, 2009 separately were utilized, the corresponding surface temperature of Huayan new city in Chongqing were retrieved with mono-window algorithm carried out by Qin Zhihao. The retrieved results show that during the 21 years from 1988 to 2009, high temperature regions...
In this paper, a silicate monitor was researched and produced according to the chemiluminescence principle. Measuring and controlling were carried out by computer. The monitor has more advantages than others in measuring principle, responding time, hydraulic equipment, operating method and so on. It is well instrument for monitoring silicate in water treatment processes.
This paper presents the retrieval of Sea Surface Temperature (SST) from the measurements acquired by the InfraRed Atmospheric Sounder (IRAS) onboard the Chinese second generation polar-orbiting meteorological satellite FengYun 3A (FY-3A). First, the intercalibration of IRAS/FY-3A channels 8 and 9 with AIRS/Aqua channels in July 2008 over the North Pole region was implemented using the High Spectral...
The cold flow properties of waste oil biodiesel (WME) were studied by gas chromatography-mass spectrometry (GC-MS), multifunctional low temperature tester, differential scanning calorimetry (DSC) and solution crystallization theory. Three approaches for reducing cold filter plugging point (CFPP) of WME were investigated: crystallization fractionation, blending with winter petrodiesel and treating...
Eutrophication and algae bloom, which are caused by the sharply increasing point and non-point sources contaminants, have been major water quality problems in the Tai Lake drainage system in recent two decades. To find out the spatial distribution attributes of the contaminants (e.g., nitrogen and phosphor), two field trips around and in the Tai Lake system were conducted. 38 sampling points in the...
Generally, the concrete whose intensity level is C60 and above is called as high-strength concrete. High-strength concrete is usually used for vertical pressure component due to its poor ductility and its advantages of high compressive strength, good fluidity, denseness, low porosity, etc. Combined with engineering examples, monitoring was conducted for the strain on the binding site of high-strength...
Using five kinds of satellite-derived sea surface temperature (SST) from infrared radiometers (AVHRR, MODIS/Aqua, MODIS/Terra) and microwave radiometers (TMI, AMSR), a set of high-quality, cloud-free, high-resolution (1/20°) merged SST product was generated through an optimum interpolation scheme. The area of merged SST product (OISST) [0–42°N, 95–150°E] covers the whole China Sea as well as the western...
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