Time filter

Source Type

Longxi, China

Sanjiang University is a university located in the countryside of Nanjing city, which is the capital of China's Jiangsu Province.Sanjiang University is the first private institution of higher learning in the Jiangsu Province. The current president is Professor Chen Wannian, who is a member of the ninth National People's Congress of P.R.China.The campus occupies an area of more than 300,000 square metres, and its buildings have 200,000 square metres of floor space.The student body of this institution consists of around 7000 students, including 1300 students in Continued Education School. Sanjiang University also recruits foreign students. Sanjiang University employs around 550 faculty members, of which, more than 380 are professors and associate professors. Wikipedia.

Yang Z.-L.,Sanjiang University
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2013

The fiber-optic sensor based on Mach-Zehnder interferometer is used in the perimeter alarm system. It can be used for alarming the vibration signal which occurs in the sensing area and has a very high sensitivity. In order to reduce the false alarm rate of perimeter alarm system, for signal processing of perimeter alarm system, by applying the wavelet transform method, the voltage signal outputted by the perimeter alarm system is identified, which could not only filter the noise signal but also retain mutant signal and distinguish very well the vibrations produced by deliberate invasion and rain to reduce false alarm rates of the perimeter alarm system and realize the deliberate invasion positioning. It is a breakthrough for the perimeter alarm system to realize engineering application. A large number of experimental results showed that it could reflect the singular value of measurement signals and remarkably reduce the false alarm rate of perimeter alarm system based on wavelet transform method to analyze signal of perimeter alarm system. Source

To provide a theoretical basis for the optimization design of the composite foundation, we analyzed the long-pile length of rigid-long-pile & flexible-short-pile composite foundation using finite element software ANSYS as well as the effects on the whole performance of the composite foundation. The results show that under same vertical load, foundation settlement was significantly reduced with increase of long-pile length when long-pile length is less than 20m, but when the long-pile length is more than 30 m, reduction amplitude of settlement decreases significantly. When the long-pile length increases from 10m to 30m, stress distribution of the pile is similar in shape, with slowly increase of the values. It proves that long-pile length is an important parameter affecting reliability and economy of composite foundation, foundation settlement decreases with the increase of long-pile length, but if the long-pile length is longer than the effective pile length, the settlement of composite foundation will be little change. © (2013) Trans Tech Publications, Switzerland. Source

Yang Z.,Sanjiang University
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2014

The sampling signal of the optical intrusion alarm system is filtered with threshold method of wavelet transform. according to the characteristics of the filtered signal, the filtered signal is decomposed to 4-scales with db8 wavelet, and the statistics of the wavelet detail coefficients energy of each scale is carried out, and the signal characteristics of each band of the original signal are obtained and the signals are identified based on the signal characteristics, it can alarm reliably for attempted intrusion. It is proved by practice that the false alarm rate is reduced greatly using this identification method. ©, 2014, Sichuan Institute of Piezoelectric and Acoustooptic Technology. All right reserved. Source

Yu Q.,Sanjiang University | Gong W.,Nanjing Southeast University | Liang S.,Nanjing Southeast University
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

There are intensive distribution pebbles with high bearing capacity in Urumqi, Therefore, the lateral friction is usually ignored, but the tip resistance is attached importance during pile foundation design in the region. However, it is difficult to accurately obtain the mechanical properties of tip soil by traditional deep load test. The self-balance load test method was used according to the advantage of testing tip resistance. Based on the test results and the corresponding codes, the tip resistant normal value and the tip resistant characteristic number were obtained. Besides, the design project has been optimized according to the achievements of the test. The experience for similar projects of deep level plate load in pebble bed area using self-balance load method was obtained. Source

Fang S.,Nanjing Forestry University | Zhai X.,Nanjing Forestry University | Zhai X.,JiangXi Environmental Engineering Vocational College | Wan J.,Nanjing Forestry University | And 2 more authors.
Biomass and Bioenergy | Year: 2013

Bioenergy from plants could make a substantial contribution to alleviation of global problems in climate change and energy security. The rapid growth rates of hybrid poplar (Populus spp.) exhibit a great potential for biofuels and selecting superior clones is critical to increase biomass production and ecological effects. Variation in growth, chemistry and calorific value of the 25 poplar clones were examined at nursery stage. The significant clonal differences in growth, leaf traits, wood basic density, chemical compositions and calorific values were observed among the 25 clones. Total leaf area per plant varied along a two-fold range (7146.7-18065.0cm2), mean single leaf area varied between 273.4 and 496.9cm2 and specific leaf area ranged from 158.7 to 204.9cm2g-1. After one growing season, the mean stem biomass production per plant ranged from 173.5g to 485.8g, while the average wood basic density varied from 224 kgm-3 to 310kgm-3 among the tested clones. Mean gross calorific value of the stem on an oven-dry weight basis was within the range of 18.5-19.1kJg-1, while mean ash free calorific value varied between 18.7 and 19.3kJg-1. All the chemical compositions measured both in stem wood and stem bark also presented a broad variation and clonal effects. Based on a comparison of component score coefficients, twenty-five hybrid clones were classified into four distinct groups by means of hierarchical cluster analysis, and clones 208, 328 and 75 showed excellent growth and combustion traits. Clones for further long-term trials in large-scale were also recommended to reduce loss of superior genetic material and risks of maladaptation. © 2012 Elsevier Ltd. Source

Discover hidden collaborations