Time filter

Source Type

Chen Z.,Nanjing University of Posts and Telecommunications | Chen Z.,Nanjing University | Chen Z.,Key Laboratory of Broadband Wireless Communication and Sensor Network Technology | Li S.,Nanjing University of Posts and Telecommunications | And 3 more authors.
International Review on Computers and Software | Year: 2012

In order to improve energy efficiency, the bacterial foraging optimization algorithm (OBFOA) is applied into the routing strategy for wireless sensor networks. The proposed strategy makes proper improvements on bacteria's foraging operation to improve the performance of the algorithm, such as the adaptive step strategy in the swimming operation and the comprehensive selection mechanism in the tumbling operation. OBFOA builds optimized data transfer paths in wireless sensor networks through the processes of chemotaxis, global quorum sensing mechanisms, reproduction and elimination-dispersal. Simulation results show that the proposed strategy can balance the energy consumption of nodes effectively and prolong the overall network lifetime. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.


Peng H.,Soochow University of China | Zhang Q.,Soochow University of China | Zhang Q.,Centers for Disease Control and Prevention | Cai X.,Nanjing University of Traditional Chinese Medicine | And 8 more authors.
American Journal of Hypertension | Year: 2015

Background: Corin has been suggested to be associated with hypertension by cell- and animal-based studies. However, the association still lacks population-based evidence which critically promotes translation from basic research to clinical and preventive practice. Here, we aimed to explore the association in a general population of China. Methods: From January to May 2010, we conducted a cross-sectional study in 2,498 participants aged above 30 years, residing in Gusu district of Suzhou. Serum soluble corin and blood pressure were measured. Results: Hypertensive participants had a higher level of serum corin than nonhypertensive participants (median (interquartile range): 1,836.83 (1,497.85-2,327.87) pg/ml vs. 1,579.14 (1,322.18-1,956.82) pg/ml, P < 0.001). Higher serum corin was positively associated with prevalent hypertension (odds ratio (OR) = 2.01, P < 0.001). In the multiple analysis, participants in the third (OR = 1.43, P = 0.007) and fourth (OR = 1.96, P < 0.001) quartiles had significantly increased odds of hypertension compared to those in the lowest quartile of serum corin. ORs of hypertension positively and significantly increased with serum corin levels (P for trend <0.001). Further subgroup analysis showed that ORs of hypertension associated with high corin (over the median level of serum corin: 1,689.20 pg/ml) were still significant in subgroups by age, body mass index, total cholesterol, low-density lipoprotein cholesterol, and fasting plasma glucose (all P < 0.05). Conclusions: Our study showed that hypertensive participants had an increased serum corin level compared to those without hypertension. This finding suggests that corin may play a role in the pathology of hypertension. © 2015 American Journal of Hypertension, Ltd.


PubMed | Centers for Disease Control and Prevention, Nanjing University of Traditional Chinese Medicine, Suzhou University and Suzhou Entry Exit Inspection and Quarantine Bureau
Type: Journal Article | Journal: American journal of hypertension | Year: 2015

Corin has been suggested to be associated with hypertension by cell- and animal-based studies. However, the association still lacks population-based evidence which critically promotes translation from basic research to clinical and preventive practice. Here, we aimed to explore the association in a general population of China.From January to May 2010, we conducted a cross-sectional study in 2,498 participants aged above 30 years, residing in Gusu district of Suzhou. Serum soluble corin and blood pressure were measured.Hypertensive participants had a higher level of serum corin than nonhypertensive participants (median (interquartile range): 1,836.83 (1,497.85-2,327.87) pg/ml vs. 1,579.14 (1,322.18-1,956.82) pg/ml, P < 0.001). Higher serum corin was positively associated with prevalent hypertension (odds ratio (OR) = 2.01, P < 0.001). In the multiple analysis, participants in the third (OR = 1.43, P = 0.007) and fourth (OR = 1.96, P < 0.001) quartiles had significantly increased odds of hypertension compared to those in the lowest quartile of serum corin. ORs of hypertension positively and significantly increased with serum corin levels (P for trend <0.001). Further subgroup analysis showed that ORs of hypertension associated with high corin (over the median level of serum corin: 1,689.20 pg/ml) were still significant in subgroups by age, body mass index, total cholesterol, low-density lipoprotein cholesterol, and fasting plasma glucose (all P < 0.05).Our study showed that hypertensive participants had an increased serum corin level compared to those without hypertension. This nding suggests that corin may play a role in the pathology of hypertension.


Wang J.-M.,Tianjin Polytechnic University | Wang X.,Tianjin Polytechnic University | Wang S.-B.,Tianjin Polytechnic University | Li S.-X.,Tianjin Navigation Instruments Research Institute | Leng Y.,Suzhou Entry Exit Inspection and Quarantine Bureau
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2011

Navigation is a key technology for autonomous robots, which makes them movable in an unknown environment. To tackle the difficulty of building indoor navigation map for inertial navigation systems, a new map building method for inertial/visual navigation is proposed. By limiting robot's movement within the floor areas, the global navigation map is generated from a bird-view image. An algorithm of automatic floor segmentation is proposed, which employs principal component analysis to implement dimension reduction for local color features and adopts clustering analysis to realize floor segmentation automatically. Finally, an indoor bird-view image database is built to evaluate the algorithm. The algorithm gets the worst performance, 75% averaged accurate segmentation rate, on the fourth group images because illumination reflection is found in the images. Average accurate segmentation rates on other groups are around 85%. Thus, the preprocessing algorithms, such as illumination refection detection, can help to improve the performance of the algorithm.


Ming Z.,Tianjin Polytechnic University | Jianming W.,Tianjin Polytechnic University | Ling D.,Tianjin Polytechnic University | Yi Z.,Tianjin Polytechnic University | And 2 more authors.
Proceedings - 2011 International Symposium on Computer Science and Society, ISCCS 2011 | Year: 2011

Resolvers are extensively used in applications that demand instantaneous, accurate and high-resolution information angular position or speed. A resolver's analog outputs have been modulated by angular position and an R/D converter is always adopted to recover the angular position in digital form. With the rapid growth of micro-processor technology, more and more attention has been focused on software based R/D conversion methods because of their merits, such as saving in cost, weight and size. In practical applications, noise is often unavoidable and might cause severely negative effect on results of software based R/D conversion schemes. To tackle the problem, a new R/D conversion method designed in frequency domain is presented in the paper. Firstly, a new complex signal is constructed by taking the cosine output as the real part and the sine output as the imaginary part. After transforming the complex signal into frequency domain, only the components at the carrier frequency are utilized to calculate the angular position. Thus, the negative effect of noise, whose energy is located out of the band of the carrier frequency, can be removed. In the simulation experiments, dc drift, white noise and pulse disturbance are utilized to evaluate the performance of R/D conversion algorithms, and the experimental results show the frequency domain based method is favorably robust to all the three types of noise. © 2011 IEEE.


Hu L.,Suzhou Entry Exit Inspection and Quarantine Bureau | Chen Y.,Northumbria University | Scanlon W.G,Queen's University of Belfast | Scanlon W.G,University of Twente
IET Microwaves, Antennas and Propagation | Year: 2011

The authors consider a point percolation lattice representation of a large-scale wireless relay sensor network (WRSN) deployed in a cluttered environment. Each relay sensor corresponds to a grid point in the random lattice and the signal sent by the source is modelled as an ensemble of photons that spread in the space, which may 'hit' other sensors and are 'scattered' around. At each hit, the relay node forwards the received signal to its nearest neighbour through direction-selective relaying. The authors first derive the distribution that a relay path reaches a prescribed location after undergoing certain number of hops. Subsequently, a closed-form expression of the average received signal strength (RSS) at the destination can be computed as the summation of all signal echoes' energy. Finally, the effect of the anomalous diffusion exponent β on the mean RSS in a WRSN is studied, for which it is found that the RSS scaling exponent ε is given by (3β-1)/β. The results would provide useful insight into the design and deployment of large-scale WRSNs in future. © 2011 The Institution of Engineering and Technology.


Chen J.,Nanjing University | Liu Y.,Suzhou Entry Exit Inspection and Quarantine Bureau | Gu J.H.,Suzhou Entry Exit Inspection and Quarantine Bureau
Advanced Materials Research | Year: 2011

A fast testing procedure for the determination of VOCs in textile matrix using solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) was introduced. Samples were cut into small pieces and soaked in 5% methanol (v/v) saturated NaCl solution with supersonic pretreatment at 40±1° water-bathing for 15 min and headspace exposure for 10 min at 50° with stirring rate at 1100rmp. The influence of SPME adsorption time, stir speed, adsorption time and temperature, and gas chromatography (GC) inlet conditions for the SPME were investigated. Then the matrix solutions were extracted by headspace SPME and analysis by GC/MS. Under the optimized conditions, the limits of detection for target compounds were 0.005mg/kg with average recovery between 90.6-108.7%. The results obtained clearly showed the potential of SPME for efficient concentration of the target compounds and also demonstrated the reliability of this extraction technique for the monitoring of textile quality for the eco-marks. © (2011) Trans Tech Publications.


Pan K.,Suzhou Entry Exit Inspection and Quarantine Bureau | Guan J.P.,Soochow University of China | Wu S.M.,Suzhou Entry Exit Inspection and Quarantine Bureau
Advanced Materials Research | Year: 2011

Color fastness is a very important indicator to evaluate the quality of textiles. At present, color fastness is tested mainly according to China National Standard (GB/T series) and American Association of Textile Chemists and Colorists (AATCC series). Different standards give different quality results for the same sample. The paper mainly compared the differences of color fastness to water, perspiration and rubbing between GB/T series and AATCC series. Color fastness to water tested according to GB/T5713-1997 was different from AATCC107-2007 in sample size, liner fabric, and time for keeping constant temperature with 4h and 18h, respectively. The differences of color fastness to perspiration of GB/T3922-1995 and AATCC15-2007 were sample size, liner fabric, component and pH value of perspiration, liquor ratio and time for keeping constant temperature. Of which pH value of perspiration showed remarkable difference, GB/T3922-1995 specified two kinds of perspiration with pH value 5.5 and 8.0, while AATCC15-2007 specified pH value with 4.3. Color fastness to crocking stands of GB/T3920-2008 and AATCC8-2007 had little difference, mainly in the moisture of rubbing fabric. © (2011) Trans Tech Publications.


Hu L.-Q.,Suzhou Entry Exit Inspection and Quarantine Bureau | Hu L.-Q.,Chinese Academy of Inspection and Quarantine
2010 Asia-Pacific Symposium on Electromagnetic Compatibility, APEMC 2010 | Year: 2010

The conversion of radiated field strength at different distance in semi-anechoic chamber is analyzed. Firstly, the empirical model based on the logarithmic distance path loss is introduced. Secondly, theoretical models of radiation field in the same site or the different site at different distance are obtained through calculating the difference of normalized site attenuation (NSA) with different transmit / receive antenna distance. The engineering model in the different sites is also discussed. The experimental data is used to analyze the conversion of radiation field strength at different distance. The experimental results show that it is not appropriate to introduce a determinate correction factor in dealing with the conversion of equipment under test measured in the 3m and 10m semi-anechoic chamber. © 2010 IEEE.


Chen J.,Suzhou Entry Exit Inspection and Quarantine Bureau | Gu J.,Suzhou Entry Exit Inspection and Quarantine Bureau | Liu Y.,Suzhou Entry Exit Inspection and Quarantine Bureau
Advanced Materials Research | Year: 2010

Nanotechnology has proven its importance in almost all areas, and textile industry is not an expectation. Several applications of nanotechnology can be extended to attain the performance enhancement of textile manufacturing machines and processes. Using different methods like electro spraying and electro spinning, various materials have been used to increase additional functions in textiles. This treatment is applied to give textiles the desired handle, to make further processing easier and to improve the thermal and antistatic properties. In this manuscript, we have summarized the recent advances made in nanotechnology and the methods of fabricating functional fibers by electrospinning and melt spinning preparation. Applications of the nanotechnology in textile industries are also summarized in this paper with some novel ideas that can be utilized for the future research in this area. © (2010) Trans Tech Publications, Switzerland.

Loading Suzhou Entry Exit Inspection and Quarantine Bureau collaborators
Loading Suzhou Entry Exit Inspection and Quarantine Bureau collaborators