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In order to investigate the content of groundwater NO3 -- N in Hebei Province. [Methods] In 2011,500 groundwater samples were collected from 11 cities of Hebei Province before and after the rainy season, the contents of groundwater NO3 -- N was analyzed with ultraviolet and visible spectrophotometer. [Results] The groundwater NO3 -- N contents of Hebei Province changed from 0.01mg/L to 350.86 mg/L,...
According to the National Standard of the People's Republic of China <Agricultural Safety and Quality of Agricultural Products — Pollution-free Vegetable Production Environment Requirements> (GB/T18407.1-2001), environmental quality assessment of heavy metal in soil of pollution-free vegetable produced in Hebei Plain Area was carried out. The results by the single-index model indicated that...
With the acceleration of urbanization process and the growth of motor vehicles in China, transportation, environment and energy issues have become important issues of urban development, and developing rail transportation is one of the main ways to solve the urban problems. This paper analyses China's basic urban rail transit situation, the supply and demand of urban rail transit and the choice of...
The characteristics of spatio-temporal distribution of tropospheric NO2 vertical column density (VCD) over Yangtze Delta(YD) are presented, on the basis of measurements from the satellite instruments Ozone Monitoring Instrument(OMI). From these observations, monthly and yearly averaged tropospheric NO2 variations are determined for the period of 2005-2009. A linear regressed model is used to fit the...
The researches and applications on ant colony algorithm have made great progress in recent years. A number of results have proved the validity of the algorithm and its advantages in some fields. However, its basic shortcomings, which are long searching time and easily jumping into local optimal solution, have not been completely solved. This paper analyzes the reasons of stagnation and then introduces...
In order to collect the funds to restore and preserve the groundwater in China, it is important to study the proportion of each financing mode. The applicable financing modes of restoration and preservation project for Chinapsilas groundwater include seven, such as national financial transfer payment, national treasury bonds, local government financial transfer payment, municipal bonds, Bank Loans,...
Entity uncertainty is an unavoidable problem in modern enterprise databases, resulting from integration of data over multiple sources. In traditional warehousing, the administrator, during an ETL process, manually and laboriously resolves inconsistent data records to discover "true'' entities(customers, products, etc.) and identify their "correct'' attribute values. At any time point, however,...
In the advanced Supply Chain/Logistic system, RFID system adapts the radio waves to scan and record the data received from RFID tags. The RFID readers can be placed up to a few meters away from RFID tagged objects. According to the investigation conducted by EPCglobal, the readers are still unable to achieve 100% reading rates, and it means the Wal-Mart and its suppliers could not reach complete reading...
The healthcare industry is served by various specialists and technicians, such as doctors, nurses, pharmacists, medical technicians, radiologists, etc. They form the major workforce in hospitals. In order to provide good healthcare services, teamwork among them is of great importance, and the management of cross-functional teams consisting of specialists and technicians is a significant issue. This...
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