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The paper that is based on the mesoscopic damage evolution of metal explores the mechanism of Kaiser effect. Unidirectional and multidirectional tensile experiments of Q345 material were conducted to reveal the relationship between the internal damage evolution of mesoscopic holes and Kaiser effect. The results show that the forcewill cause the damage corresponding to the direction of force. When...
As the course of fundamentals of computer pays more attention to the cultivation target of practice ability and the computational thinking ability, we devote to these problems' research as experimental teaching model, teaching contents and teaching method, and reform the innovation practice teaching mode research of the fundamentals of computer in this paper. In the new teaching mode, a new practice...
Construction industry is the pillar industry and has made great contributions to the economic construction in China. Constructing enterprise as the implementer of construction entities, the key question to stay competitive is cost management and control. This paper analysis and control the construction cost from comprehensive unit price under the BQ mode and raise cost control points to ensure the...
The paper explores the differences between the English and Chinese languages through the theories of Contrastive Linguistics and also points out the characteristics of EST. English-Chinese translation skills of attributive clauses are discussed through examples and the impact of the differences of the two languages on the translation of EST writing is shown
We studied the protective effect and antioxidant mechanism of Xiongma pills-containing serum on H2O2 injury in PC12 cells. Oxidative stress models were established by H2O2 pretreated with PC12 cells. Cell viability, lactate dehydrogenase release(LDH) in culture supernatants and glutathione peroxidase (GSH-PX) activities in suspension cells were determined by MTT assay and chemistry determination,...
Key management in sensor networks is a challenging issue due to the limited resource constraints of sensors. Many proposed schemes are based on key pre-distribution using pre-deployment knowledge that is difficult to obtain where nodes are randomly deployed. For this reason, location dependent key scheme (LDK) has been proposed in which nodes generate keys depending on the relative locations without...
Key management is considered to be the prerequisite for secure communication in WSNs. However, many of those key management schemes normally either require the pre-deployment knowledge to generate keys, which is unrealistic, especially in large scale sensor networks, or consume a large amount of energy. In this paper, we present a new key management scheme named Energy-efficient Location-dependent...
A 100 MHz high resolution ultrasonic micro-transducer with a focal lens is designed for medical imaging based on monocrystalline lithium niobate (LiNbO3) 36°/Y-cut. Finite element analysis is used to characterize the impulse response of this transducer and the stationary wave propagation. The results show that the focal lens attributes a lot to the directivity and the resolution. The wave derived...
The research chose the alginate sodium and PVA as the materials to immobilize the atrazine degrading bacteria. Four methods were adopted: alginate sodium adsorption method, alginate sodium embedding method, PVA boric cross linking method and PVA freezing method. The degrading effects and the characteristics of the atrazine degrading bacteria in the two materials were studied respectively. The result...
Among of Security schemes for Wireless Sensor Networks (WSNs), key management is challenging issue to ensure security of applications. The key management is to establish the required keys between nodes which exchange data. Also, key revocation scheme is required part of the key management. Among of key revocation schemes, the KeyRev is securer than previous schemes, because it depends on using session...
In China, more and more companies are constructing internal control system as enterprise internal control basic standard (EICBS) was released last year. Based on the data obtained in a survey, we firstly examine the quality of internal control in China companies. Secondly we examine how and to what extent the firm-specific characteristics determine the quality of internal control. We find that size,...
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