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Changbai Mountain is one of the most important area in northeast of China where large area of temperate forests distribute. Lushuihe Forestry Bureau, located in the center of the region, was selected as a study site. We calculated the areas of different forest landscapes and selected MPS and CONTAG landscape indexes to carry out landscape pattern analysis for Lushuihe from 1987 to 2003 based on forest...
The variability of pulse wave was found and discussed recently. The cross-correlation of variability of the parameters of pulse wave was studied in this paper. We found that the variability of the features in time was closely related. However, the variability of the features in time had little correlation with that of the amplitude features of pulse wave. The complexity of the variability of these...
Based on the acid rain data measured at Shapingba weather station in Chongqing from 1993 to 2007 and the emission data of SO2 in Chongqing, Guizhou and Sichuan, the acid rain change trend and its relationship with SO2 emission were analyzed. The results indicated that in the past 15 years, the change trend of the pH value of the precipitation in Chongqing changed between 3.8 and 4.5. The annual variation...
Shijiazhuang has been in visibility impairment situation for many years but with less studied. In this research, we collected the meteorology data and sampled PM10 to measure the mass concentration and total carbon content, in odor to discuss the possible relationship with visibility. The results show that the annually average visibility declines to 10.2-12.7km and monthly average visibility presents...
The adsorption of diesel oil in seawater on biodegradable adsorbing material and the influencing factors such as salinity, pH and temperature were studied. Results showed the adsorption of diesel fitted the second-order reaction model, and the saturated adsorption capability was 6.69g/g which can be reached in 10-20min. The diesel oil removal efficiency increased with the increment of salinity and...
The Sanjiang Plain is the largest low-altitudinal swampy plain in China where has been strongly affected by human activities particularly the conversion of marsh to cropland. Four plots of Carex lasiocarpa marsh, Deyeuxia angustifolia marsh, rice field and dryland were selected in this study to evaluate the effect of land-use change on soil respiration. Results showed that the seasonal changes of...
This paper discusses the influence of meteorological conditions on the occurrence of bacillary dysentery in Lanzhou. Understanding the meteorological conditions that bring on outbreaks can provide a scientific basis for the implementation of preventive countermeasures and cures effective against bacillary dysentery. Here an analysis of 11,909 cases of bacillary dysentery in Lanzhou has been carried...
The shallow city river of Baoyang located in China had been eutrophicating with nutrients from domestic sewages for many years. A heavy bloom of Microcystis.aeruginosa in Baoyang River was recorded in 2004 and microcystin-RR (MCRR), the most popular cyanobacterial hepatotoxin microcystins in China, could be detected in the river in the next several years in the filtered waters. To determine the environmental...
Aimed at the current situation of nitrogen pollution in groundwater, adsorption characteristics of ammonia-nitrogen onto different lithology named silty sand, silty clay and clay were studied. The results indicated that the process of ammonia-nitrogen adsorption onto soils mainly occurred within 0~2 h, then attended to a dynamic equilibrium. Two kinetic models can describe the experiment data and...
The acute toxicity of triazoles to earthworms was studied in using a simple paper contact method proposed by OECD testing guideline no. 207. It was found the median lethal concentration (LC50) had no correlation with log Pow (1-octanol/water partition coefficient) of the chemicals. However, the toxicity of triazoles was different for E. fetida and for fresh water organisms by comparing with other...
The article emphasizes clinical significance and analysis of electroencephalogram (EEG) test with nonlinear analysis applied on patients with unilateral temporal lobe epilepsy (TLE). The entire epileptic onset of seizures in 22 patients with TLE were recorded with the synchronous 18-lead EEG. According to the shape of EEG waves and the corresponding symptoms of the clinic during their seizures, data...
We compared the distribution of methylation of histone H3 lysine 4 on genes of different lengths. The result shows that the mono- and di-methylation present different distribution patterns on genes with different lengths. Furthermore, these two methylations exhibit distinct correlations with expression when gene length is different. Our results suggest that the gene length might play a role in the...
With the Tessier Five-step Continuous Extracting Method, the thesis studied the form distribution of heavy metals in the sediment samples collected from Mochou Lake, Xuanwu Lake and Qinhuai River in Nanjing, analyzed the correlation between leaching contents of heavy metals and various forms and between content of organic matter and leachability of heavy metals and between organic matter and organic...
In this paper, two kinds of fluorine-contaminate soils, fluvo-aquic soil and paddy soil, were cultivated by nitrogen fertilizer. Then, we studied the various fluorine species in the cultivated soil by sequential extraction method, and study the effect of main components in nitrogen fertilizer on pH of soils. After adding nitrogen fertilizer, the pH value of soil would increase, which consequently...
A novel imaging processing method using gray level co-occurrence matrix (GLCM) to evaluate microbubble concentration in ultrasonic particle image velocimetry (echo PIV) technique is presented in this paper. The image processing method is used to study the optimum microbubble concentration in Echo PIV imaging of a two dimensional blood flow field. It is found that for the GLCM correlation values for...
The cadmium adsorption and desorption by simulant acid rain on different clay minerals in soil have been discussed. When the pH value is 7, adsorption time is 1 h, and the medium is 0.05 mol.L-1 KNO3, the saturated adsorption capacity of cadmium on montmorillonite, illite, and sepiolite is found to be 2.88,1.08,2.82 mg/g respectively, but on kaolinite nothing is found. A correlation analysis shows...
Understanding the initiation site and propagation of epileptiform discharges in hippocampus are of important physiological significance. Here in transverse plane of hippocampus, the above questions were investigated with low-Mg2+ ACSF perfused hippocampal slices of Sprague Dawley rat using microelectrode arrays. Initiation site of epileptiform discharges was determined by comparing the onset time...
One important problem in ultrasound image processing is to find the edges of structures and enhance weak borders between different organs and structures. An approach was developed that detects and enhances edges adaptively based on image block correlation technique. From the image block correlation we can get the "local correlation image" LCI. On the basis of this image we apply an adaptive...
This work aims at selecting useful features in critical angles and distances by Gray Level Co-occurrence Matrix (GLCM). In this project, images were labeled based on physician opinion in two groups (malignant or benign). These labeled images were used in classification analysis. Images were opened and read in Matlab software. The tumors were cropped in rectangular shape manually; then graycomatrix...
Multi-channel ECoG signals are directly recorded from the surface of brain during finger flexion. Here they are used to construct brain functional networks based on phase synchronization theory. The channels of ECoG signals are considered as the nodes of brain functional networks, and the interactions among the channels suggest the connectivity of brain functional networks. The edge between two different...
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