http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Optimal Isosceles Trapezoid Cross Section of Laterally Loaded Piles based on Friction Soil Arching
Junjie Wu,Changdong Li,Qingtao Liu,Fusong Fan 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.7
The paper presents a novel analytical solution to determine an optimal isosceles trapezoid cross-section of stabilizing piles subjected to the lateral load. In view of the pile-soil interaction mechanical analysis on the friction soil arching between the adjacent stabilizing piles, a general mechanical model for analyzing the behavior of the laterally loaded stabilizing piles with isosceles trapezoid cross-section is put forward. The reasonable net pile spacing expression for all kinds of isosceles trapezoid section piles is established via the analytical deduction, and it indicates that there is a positive relationship between the reasonable net pile spacing and gradient of pile sidewall. In consideration of the strength failure possibility in the apex of friction soil arching, the complete expressions of both the gradient of pile sidewall and corresponding reasonable net pile spacing of stabilizing piles can be established. The case study of Jinle landslide verifies that the reasonable pile spacing obtained by the presented model is slightly greater than that of the conventional design scheme, which shows that the stabilizing piles with optimal isosceles trapezoid cross-section can results in reducing the investment of the whole stabilizing piles.
Xiuling Bai,Mingchuan Zhang,Qingtao Wu,Ruijuan Zheng,Haixia Zhao,Wangyang Wei 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.6
Due to various reasons, there are generally missing data in datasets. Usually the missing data in these incomplete datasets need to be filled. In this paper, the drawbacks of some existing data filling approaches for incomplete information systems are analyzed based on Rough Set theory. Several similarity relation models are discussed and the Valued Limited Tolerance Relation model is proposed. A data filling algorithm based on the Valued Limited Tolerance Relation model is put forward. This approach makes full use of the similarity of objects and selects the object which is the most similar to the incomplete object. More missing data can be filled scientifically. The experimental results show that this approach is effective.
Characteristics of Copper-Clad Aluminum Rods Prepared by Horizontal Continuous Casting
Yubo Zhang,Ying Fu,Jinchuan Jie,Li Wu,Kateryna Svynarenko,Qingtao Guo,Tingju Li,Tongmin Wang 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.6
An innovative horizontal continuous casting method was developed and successfully used to prepare copper-cladaluminum (CCA) rods with a diameter of 85 mm and a sheath thickness of 16 mm. The solidification structure andelement distribution near the interface of the CCA ingots were investigated by means of a scanning electron microscope,an energy dispersive spectrometer, and an electron probe X-ray microanalyzer. The results showed that theproposed process can lead to a good metallurgical bond between Cu and Al. The interface between Cu and Al wasa multilayered structure with a thickness of 200 μm, consisting of Cu9Al4, CuAl2, α-Al/CuAl2 eutectic, and α-Al +α-Al/CuAl2 eutectic layers from the Cu side to the Al side. The mean tensile-shear strength of the CCA sample was45 MPa, which fulfills the requirements for the further extrusion process. The bonding and diffusion mechanismsare also discussed in this paper.
Dafeng Song,Fanyong Zeng,Xiaohua Zeng,Qingtao Wu 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.6
This study establishes a simulation model of the voltage output of a fuel cell stack based on its basic design parameters. Under the condition that the number of cells in the stack remains unchanged, the output capacity of the stack from the control level is explored to increase the power level. This study optimizes the system, analyzes the game process between the parasitic power supply system and the output power of the fuel cell stack, and optimizes the output capacity of the fuel cell stack by compensating the backpressure. To strengthen the flow-pressure coupling during pressure compensation, the principle of autodisturbance decoupling control is applied to the strong coupling system to design a flowpressure dynamic decoupling controller that can weaken the flow-pressure coupling effect.
A Novel Bio-inspired Trusted Routing Protocol for Mobile Wireless Sensor Networks
( Mingchuan Zhang ),( Changqiao Xu ),( Jianfeng Guan ),( Ruijuan Zheng ),( Qingtao Wu ),( Hongke Zhang ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.1
Routing in mobile wireless sensor networks (MWSNs) is an extremely challenging issue due to the features of MWSNs. In this paper, we present a novel bio-inspired trusted routing protocol (B-iTRP) based on artificial immune system (AIS), ant colony optimization (ACO) and Physarum optimization (PO). For trust mechanism, B-iTRP monitors neighbors` behavior in real time and then assesses neighbors` trusts based on AIS. For routing strategy, each node proactively finds routes to the Sink based on ACO. When a backward ant is on the way to return source, it senses the energy residual and trust value of each node on the discovered route, and calculates the link trust and link energy of the route. Moreover, B-iTRP also assesses the availability of route based on PO to maintain the route table. Simulation results show how B-iTRP can achieve the effective performance compared to existing state-of-the-art algorithms.
A Novel Architecture for Cognitive Internet of Things
Mingchuan Zhang,Yong Qiu,Ruijuang Zheng,Xiuling Bai,Wangyang Wei,Qingtao Wu 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.9
Internet of Things (IoT) represents the extension and evolution of the Internet, which has great potential and prospects for modern intelligent service and applications. However the current IoT is still based on traditional static architectures and models by our deep investigation. It lacks enough intelligence and cannot comply with the increasing application performance requirements. By integrating cognition into IoT, we present a new concept of Cognitive Internet of Things (CIoT) and its corresponding intelligent architecture. CIoT consists of Protocol Plane, Cognitive Plane and Control Plane modules and involves some novel designed models such as layer protocol stack, three-layer cognitive rings. Based on the proposed CIoT, we finally develop an actual application system to address the transportation and dispatching for ready-mixed concrete. The statistical results show that the new dispatching pattern with CIoT can achieve higher efficiency of transportation and dispatching with lower oil consumption than traditional dispatching pattern.