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Zhao L.,China Earthquake Administration | Wang J.,China Numismatic Museum
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011

Masonry structures are seriously destroyed in Wenchuan Earthquake. The mainly failure characteristics of the damaged houses and buildings are that integrity of the structures is poor, and the joint in the components is very weak. Collapse and destroyed of the whole structure are usually caused by collapse of the wall. Failure modes and its developing trend of the masonry structures under earthquake action are simulated by finite element method in this paper. Results show: Reliability of masonry structure is determined by the strength of itself. Capacities of collapse resistance can be strengthened by improving integrity. The stiffness is a key role, but the ductility is difficult to be displayed. Integrity of masonry building with structure column and ring girder is increased, and its capacity is also improved. The strength of first story would be increased. © 2011 IEEE.


Zheng T.,Hefei University of Technology | Zhou W.-R.,China Numismatic Museum | Chen W.,Hefei University of Technology | Chen M.,Hefei University of Technology | Li X.,Hefei University of Technology
Chinese Control Conference, CCC | Year: 2012

Based on the analysis on characters of counterfeit currency in RMB's circulation, the control criterion of counterfeit currency is proposed. The model for prediction and supervision of counterfeit currency then is established by CARMA model. Predictions on RMB's counterfeit currency of different area and different value are carried out to verify the efficiency of this model. Pre-decision multi-objective supervision method is studied with this model to satisfy different practical needs for supervision on counterfeit currency. © 2012 Chinese Assoc of Automati.


Zheng T.,Hefei University of Technology | Zhou W.-R.,China Numismatic Museum | Wu G.,Hefei University of Technology
Proceedings of the 29th Chinese Control Conference, CCC'10 | Year: 2010

Based on the actuality of manufacturing, issuing and circulative environment of RMB currency in China, a cost optimization model for different kinds of currencies in RMB's issuing is proposed, by analyzing the circulative characters of currencies with different face value and different material. The proposed model considers not only the cost of currency's manufacturing and transportation, but also other kinds of cost in circulation. The manufactural ability of banknote printing enterprises and mints and some other facts are considered as constraints in this optimization model, so it can satisfy the demands on the amount, the kinds and the cost control of RMB currency's issuing, by the hierarchy method in optimization.


Zhou W.,China Numismatic Museum | Huang W.,China Numismatic Museum
JOM | Year: 2015

The possible use of lost-wax casting in China has long been a matter of controversy. Based on the study of pertinent ancient texts concerning the technical origins of lost-wax casting in China, direct examination of questioned ancient Chinese bronzes as well as definite lost-wax castings from both overseas and China, and modern production of objects using piece-mold casting, the authors point out their own conceptual ideas about ancient lost-wax casting as follows. First, the lost-wax casting technique does not have its earliest origins in ancient China but rather from the Sumerians in Mesopotamia, where it was predominantly used to cast small human and animal figures (statuettes). Next, some essential characteristics of the lost-wax casting technique can be identified from the point of view of a distortable soft starting model. The locally deformed shape of lost-wax castings is found to be variable. Finally, it is improper to consider the ease of extraction from the mold as the criterion for distinguishing lost-wax casting from piece-mold casting. It is therefore incorrect to conclude that the three-dimensional openwork decorations present on Chinese bronzes from the Spring and Autumn Period, and the Warring States Period, are fabricated using lost-wax castings. © 2015 The Minerals, Metals & Materials Society

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