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 |
Sun S.-F.,Sanjiang University
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2016
Distributed optical fiber perimeter security systems is vulnerable to external and has high false alarm rate. For characterizing the differences of the system output signal in the time-frequency distribution caused by different vibration sources, the wavelet energy entropy (WEE) measurement method is proposed based on wavelet analysis method. The WEE can descript the difference performance of energy distribution quantifiably for signal decomposition scale, also extract feature of the output signal and classify the output signal. The method can effectively distinguish the difference between the external environmental factors, such as mild disturbance, wind and rain, and the intentional invasion. The accuracy and real-time performance of the system is improved. The experimental results show that this method can evidently get rid of the non-intrusion disturbance, the system's correction alarm rate is higher than 92%, and the false alarm rate is low. © 2016, Science Press in China. All right reserved.
Ji S.,Sanjiang University
International Journal on Smart Sensing and Intelligent Systems | Year: 2016
In a discrete-event system, more than one sensor will create more than one event. Several events may happen at the same time parallelly. Events in different parallel branches are irrelevant and it will lead states explosions if mixing them together and enumerating all possible arrangements. A system with parallel sequences has multi-threads and can be dealt with as a whole. In this paper, after analyzing the process of discrete-event systems, the new model is established as a 5-tuple set, which is called a generator with multi-threads. The new generator will generate structured languages which are in accordance with the sequences of the process. The controllability of the structured languages is defined and the theorem about the existence of the supervisor for given languages is presented and proved. For given specifications, the method to solve the supervisor is presented. With the new model, the states of the total system will not explode when two or more systems synchronizing. From two examples shown in Section VI, the new model and supervisor theory for multi-sensors and multi-states discrete-event system are more convenient and natural than that of the traditional theories.
Yao T.,Sanjiang University |
Zhou G.,Nanjing University
Journal of Graph Theory | Year: 2017
A graph G=(V,E) is a k-critical graph if G is not (k-1)-colorable but every proper subgraph of G is (k-1)-colorable. In this article, we construct a family of 4-critical planar graphs with n vertices and 7n-133 edges. As a consequence, this improves the bound for the maximum edge density attained by Abbott and Zhou. We conjecture that this is the largest edge density for a 4-critical planar graph. © 2017 Wiley Periodicals, Inc.
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.
Xu Y.,Sanjiang University
Advanced Materials Research | Year: 2013
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.
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.
Xia Q.,Sanjiang University
International Journal of Simulation: Systems, Science and Technology | Year: 2016
In process of the pedestrian volume statistics for public places, in order to effectively remedy the defects of low detection efficiency, high false alarm rate and insufficient timeliness caused by pedestrian occlusion and congestion to pedestrian identification, a pedestrian identification model with a double-layer composite structure is designed in this article to coordinate and extract aggregated B-Haar features and Edgelet features, wherein the upper layer of the model has a complete binary tree structure which is integrated with Haar features (called aggregated B-Haar features) improved by local binary pattern and is mainly responsible for extracting the candidate pedestrian targets to ensure relatively high detection and identification rate; the lower layer is in a four-branch serial tree structure and meanwhile adopts Edgelet features and Bayesian principle to establish the tree decision structure so as to carry out multi-feature detection for the candidate pedestrians and further judge whether the candidate targets are pedestrians or not, thus to realize low false alarm rate and ensure the timeliness of the targets. Experimental analysis shows: compared with traditional tree structures and serial-parallel structures, the pedestrian identification method based on multi-feature synergetic double-layer composite structure in this article has significant advantages in the aspects of timeliness, detection rate and false alarm rate. © 2016, UK Simulation Society. All rights reserved.
Han X.,Sanjiang University
Applied Mechanics and Materials | Year: 2012
With CAXA software I designed the structure of the handling manipulator in the FMS. And focus for the design of the structure, introduced the hardware implementation of robot manipulator with the same characteristics of stepping away from its open-loop position control. The manipulator is mainly used for flexible manufacturing systems in material handling, flexible movement, safe, reliable, easy to adjust and control, simple operation, easy to implement process automation.
Wang F.,Sanjiang University
Multimedia, Communication and Computing Application - Proceedings of the International Conference on Multimedia, Communication and Computing Application, MCCA 2014 | Year: 2015
With the arrival of the information age, the traditional business model is being seriously questioned and influenced. In addition to the product, service, price, place, promotion and other aspects of the competition, the competition for the attention of consumers among companies have become increasingly intense. Attention operation, according to different standards, can be divided into a variety of attention business model, and the five senses of human thinking are closely related to the reference. This paper takes Yueyahu park as an empirical study, analyses the management problems based on the five senses, and finally draws the management optimization scheme. © 2015 Taylor & Francis Group, London.
Li D.Z.,Nanjing Southeast University |
Chen H.X.,Sanjiang University |
Hui E.C.M.,Hong Kong Polytechnic University |
Zhang J.B.,Nanjing Southeast University |
Li Q.M.,Nanjing Southeast University
Building and Environment | Year: 2013
Residential buildings account for a large share of global carbon emission, while they play important roles in economic growth and social development at the same time. Therefore, the appropriate evolution routes of residential buildings need balancing their carbon emission and value creation, which is realized in this paper by creating a new concept of life-cycle carbon efficiency and its relative methodology. First, the life-cycle carbon efficiency of a residential building is defined as the ratio of its life-cycle value to carbon emission, and the life-cycle of a residential building is divided into five stages, including construction materials preparation, building construction, building operation, building demolition, and construction & demolition wastes disposal. Second, the life-cycle carbon emission of a residential building is estimated through calculating the carbon emission at each stage based on its consumed energy and resources. Third, the product of the service life span of a residential building (in year), its building area (m2) and its storey height (m) is recommended to represent its life-cycle value, since this product is a physical measure and more useful to develop action plans to improve its performance. In the end, the proposed methodology is exemplified in estimating the life-cycle carbon efficiency of a five-storey brick-concrete residential building in Nanjing city (China) at its design phase. Possible measures to enhance the estimated carbon efficiency are further put forward, such as prolonging the service life span, enhancing 3R (reduce, reuse and recycle) principles of cement and rolled steel, saving electricity and natural gas at the stage of building operation. © 2012 Elsevier Ltd.