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Wen Z.,Tsinghua University | Zhang C.,Tsinghua University | Ji X.,Lishui Vocational and Technical College | Xue Y.,Sustainable Development Technology
Journal of Industrial Ecology | Year: 2015

China's mineral resource consumption has gone through multiple increases since 1980, resulting in the inadequacy of important strategic resources and a high level of external dependence. Some developed countries have already reduced primary resources consumption through urban mining. Can China also break through the bottleneck of the resource shortage and continue its economic and social development through strengthening of urban mining? This article selected copper (Cu), aluminum (Al), lead (Pb), and iron (Fe) as case studies and established predictive models for metal demand, recycling, and stock, based on stock analysis, material flow analysis, and a life distribution model, and then analyzed the metabolism of the four resources and compared the environmental effects of three scenarios. The study indicates that the urban mining potential of Cu, Fe, Al, and Pb will attain 8.1, 711.6, 37.0, and 12.1 million tonnes, respectively, in 2040. Compared with 2010, the substitution rate (secondary metals substituting primary metals) of Cu and Fe increase by 25.4% and 59.9%, whereas external dependence decreases by 30.8% and 25.7%. However, substitution is not obvious regarding Al and Pb. The low resource scenario decreases resources use, which will reduce external dependence in the short term, whereas the strengthened recovery scenario increases resource recovery and has a larger effect in reducing external dependence in the long term. So, in line with urban mining in the future, China should change its environment and resource strategy, further strengthen layout and construction of urban mining demonstration bases, and encourage the use of recyclable resources to provide a better foundation for urban mining. © 2015, Yale University.


Wang J.,Lishui Vocational and Technical College
Communications in Computer and Information Science | Year: 2012

College sports in the teaching can not only improve college students' physical quality, but also influences the formation of the psychological and promoting the comprehensive development of students according to the applied The characteristics of talent itself and the sport itself and the characteristics of college PE teachers, the teaching of college sports in the process of application talents has important meaning, reflect the sports teaching so In training to learn the value of the applied talents, to further improve the quality of the application talents, make application talents to better suit the development of society. © 2012 Springer-Verlag Berlin Heidelberg.


Xu J.,Lishui Vocational and Technical College
Communications in Computer and Information Science | Year: 2012

Basketball is a game on the students love sports and the main course teaching of college sports. However, in the universities sports curriculum reform process problems to the traditional teaching idea and teaching methods appear constantly. Through the method of literature review, expert interview method, and logical analysis, according to the present development of the discipline of college basketball and characteristics, the paper in different basketball teaching methods and trying to form of system method, hoping to see improve basketball teaching efficiency. It also helps to adapt to college basketball teaching quality education and © 2012 Springer-Verlag Berlin Heidelberg.


Ji G.-X.,Lishui Vocational and Technical College
Journal of Convergence Information Technology | Year: 2012

Decision tree (decision tree), also known as decision tree is a kind of information theory-based, decision tree data structure based on this classification algorithm. Categorized the decision tree in the field of data mining has been studied for many years, and had a lot of algorithms, such as the early ID3, and later improved C4.5, stressed that the algorithm can scale SLIQ and SPRIN. This article proposes to construct E-commerce recommendation system by using the ART neural network and product ontology to make up for these deficiencies. Firstly, this paper analyzes the various decisionmaking algorithms for classification learning. This paper presents the decision tree learning algorithm in the field of data mining classification by using inductive decision tree classification. The experimental results show that this method can effectively improve the performance of classification.


Li S.B.,Lishui Vocational and Technical College
Advanced Materials Research | Year: 2011

The traditional motorcycle meters are driven by the separate motors, these devices are simple and easy to be controlled, stable performance, but dial space has not been fully utilized. This paper introduces the double index show of motorcycle speed and speed, focus on analysis of dual-axis stepper motor driven connections, drive mode and the driver circuit design. The results of experiment and application shows that the coaxial two-pointer motorcycle display instrument has good repeatability, good linear scale, fast response, no jitter, high reliability and relatively small size and many other advantages, instrumentation stepper motor driver with dual-axis motor instrument design meet the relevant requirements of motorcycle meter, can be easily to achieve motor servo system driven synchronous control of double axis step-drive electromotor. © (2011) Trans Tech Publications.


Wang J.,Lishui Vocational and Technical College
Lecture Notes in Electrical Engineering | Year: 2013

The university gym instructor's vitality comes from sports scientific research. The university gym instructor must relate with the sports scientific research together. The university sports scientific research is take the university sports education phenomenon and the sports education question as an object, using scientific research principle and method, inquired about the sports teaching rule and has the sports to educate the way and method science practice. Raises the university gym instructor's sports scientific research level diligently, is advantageous in improving the university gym instructor's overall quality, the advantageous education scientific research development, improves the education quality. © 2013 Springer-Verlag.


Li S.,Lishui Vocational and Technical College
Proceedings - 2012 International Conference on Computer Science and Service System, CSSS 2012 | Year: 2012

Our country is one of the scarce water resources in 13 countries in the world, hort age of water resources as well as the low utilization of water resources restricts our country economy developing sustainably. In order to effectively reduce the impact of inadequate water resources on China's economy, from modern agricultural cultivation and management perspective, according to the basic principles of Internet, with wireless sensor technology, this article proposes precision agriculture irrigation systems based on the internet of things (IOT) technology, and focuses on the hardware architecture, network architecture and software process control of the precision irrigation system. Preliminary tests showed this system. is rational and practical © 2012 IEEE.


Wu X.,Lishui Vocational and Technical College
Applied Mechanics and Materials | Year: 2012

A new method based on matlab matrix algorithm is proposed for analyzing the mechanism of MIMO non-linear system. Firstly, the mechanism is regarded as a system and system model is established. Secondly, the transfer matrix is got by separating relations between input and output, the equivalents are acquired by pseudo-inverse, then the kinematic analysis of mechanism is realized, which provide theory basis for the design of mechanism in a sense. Finally an example is given for explaining the whole calculational process. © (2012) Trans Tech Publications.


Ji G.-X.,Lishui Vocational and Technical College
Advances in Information Sciences and Service Sciences | Year: 2012

IDS (Intrusion Detection) is through a computer network or computer system from a number of key points in the collection of information and analyze, from a network or system is found in violation of security policy behavior and signs of an attack, while making response. As a mathematical tool, wavelet analysis has been widely used in signal analysis, image processing, numerical analysis, etc. This paper presents the development of intrusion detection system based on wavelet network and proposes the wavelet network algorithm based intrusion detection system. Finally, the paper designs a wavelet-based network intrusion detection system. And verified through simulation experiments of this intrusion detection system is feasible.


Using energy-harvesting technology can make the work scope of passive radio frequency identification tag to achieve the maximum.The study put forward to collecting light from the solar cell share tag antenna area, that provides the power source except from the reader receive to electromagnetic power,which to activate the label circuit. In order to make solar cell to the influence of the tag antenna to minimum,so optimize it with electromagnetic simulation on its position.The collected dc power could convert into the radio frequency with the efficient E-class oscillator, as well as it could flow into the radio frequency identification tag terminal with the aid of the proper designed coupled circuit.The oscillation frequency is selected on the principle of not affecting the operation of label back scattering.The presented oscillator is showed in the simulations.The E-class oscillator is used together with other forms of collection technology,such as thermoelectric collect machine. © (2013) Trans Tech Publications, Switzerland.

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