Implementation of SHM system for Hangzhou East Railway Station using a wireless sensor network

Yanbin Shen,Wenwei Fu,Yaozhi Luo,Chung Bang Yun,Dun Liu,Pengcheng Yang,Guang Yang,Guangen Zhou 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.27 No.1

Structural health monitoring (SHM) is facilitated by new technologies that involve wireless sensor networks (WSNs). The main benefits of WSNs are that they are distributed, are inexpensive to install, and manage data effectively via remote control. In this paper, a wireless SHM system for the steel structure of Hangzhou East Railway Station in China is developed, since the state of the structural life cycle is highly complicated and the accompanying internal force redistribution is not known. The monitoring system uses multitype sensors, which include stress, acceleration, wind load, and temperature sensors, as the measurement components for the structural features, construction procedure, and on-site environment. The sensor nodes communicate with each other via a flexible tree-type network. The system that consists of 323 sensors is designed for the structure, and the data acquisition process will continue throughout its whole life cycle. First, a full-scale application of SHM using a WSN is described in details. Then, it focuses on engineering practice and data analysis. The current customized WSN has been demonstrated to have satisfactory durability and strong robustness; hence, it well satisfies the requirements for multi-type sensors to operate in a large area. The data analysis results demonstrate that the effects of the construction process and the environment on the super-large-scale structure have been captured accurately. Those effects include the stress variation throughout the construction process, the dynamic responses that are caused by passing trains, the strain variation caused by temperature change over the long term, and the delay in the wind-pressure history.

Thermal buckling and dynamic characteristics of composite plates under pressure load

Xuan Yang,Qingguo Fei,Shaoqing Wu,Yanbin Li 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.8

The effect of geometrical nonlinearities due to pressure load on the thermal buckling and dynamic characteristics of composite plates are investigated in this paper, which is the main contribution of this research work. The mechanical behavior of the plate is described with the first-order shear deformation theory. The geometrical nonlinearity due to both thermal effect and pressure load is introduced in the finite element model of the plate via additional stiffness matrices. Thermal buckling and modal analysis of a four-sided simply supported rectangular composite plate under different pressure fields are conducted. Numerical results show that both the mode frequencies and critical buckling temperature of the plate rise with the increase of the pressure. The vibrational mode shapes change with the gradient pressure load field. The maximum buckled deflection point moves from the center to the place where is easier to reach compressive stress state under uniform thermal load. The pressure distribution has a significant effect on the buckling mode shapes of the plate.

Fast Face Gender Recognition by Using Local Ternary Pattern and Extreme Learning Machine

( Jucheng Yang ),( Yanbin Jiao ),( Naixue Xiong ),( Dongsun Park ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.7

Human face gender recognition requires fast image processing with high accuracy. Existing face gender recognition methods used traditional local features and machine learning methods have shortcomings of low accuracy or slow speed. In this paper, a new framework for face gender recognition to reach fast face gender recognition is proposed, which is based on Local Ternary Pattern (LTP) and Extreme Learning Machine (ELM). LTP is a generalization of Local Binary Pattern (LBP) that is in the presence of monotonic illumination variations on a face image, and has high discriminative power for texture classification. It is also more discriminate and less sensitive to noise in uniform regions. On the other hand, ELM is a new learning algorithm for generalizing single hidden layer feed forward networks without tuning parameters. The main advantages of ELM are the less stringent optimization constraints, faster operations, easy implementation, and usually improved generalization performance. The experimental results on public databases show that, in comparisons with existing algorithms, the proposed method has higher precision and better generalization performance at extremely fast learning speed.

Face Recognition Based on Image Latent Semantic Analysis Model and SVM

Jucheng Yang,Min Luo,Yanbin Jiao 보안공학연구지원센터(IJSIP) 2013 International Journal of Signal Processing, Image Vol.6 No.3

Development of a dynamic sensing system for civil revolving structures and its field tests in a large revolving auditorium

Yaozhi Luo,Yanbin Shen,Pengcheng Yang,Feng Yu,Zhouneng Zhong,Jiangbo Hong 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.6

In civil engineering, revolving structures (RS) are a unique structural form applied in innovative architecture design. Such structures are able to revolve around themselves or along a certain track. However, few studies are dedicated to safety design or health monitoring of RS. In this paper, a wireless dynamic sensing system is developed for RS, and field tests toward a large revolving auditorium are conducted accordingly. At first, a wheel-rail problem is proposed: The internal force redistributes in RS, which is due to wheel-rail irregularity. Then the development of the sensing system for RS is presented. It includes system architecture, network organization, vibrating wire sensor (VWS) nodes and online remote control. To keep the sensor network identifiable during revolving, the addresses of sensor nodes are reassigned dynamically when RS position changes. At last, the system is mounted on a huge outdoor revolving auditorium. Considering the influence of the proposed problem, the RS of the auditorium has been designed conservatively. Two field tests are conducted via the sensing system. In the first test, 2000 people are invited to act as the live load. During the revolving process, data is collected from RS in three different load cases. The other test is the online monitoring for the auditorium during the official performances. In the end, the field-testing result verifies the existence of the wheel-rail problem. The result also indicates the dynamic sensing system is applicable and durable even while RS is rotating.

Development of a dynamic sensing system for civil revolving structures and its field tests in a large revolving auditorium

Luo, Yaozhi,Yang, Pengcheng,Shen, Yanbin,Yu, Feng,Zhong, Zhouneng,Hong, Jiangbo Techno-Press 2014 Smart Structures and Systems, An International Jou Vol.13 No.6

In civil engineering, revolving structures (RS) are a unique structural form applied in innovative architecture design. Such structures are able to revolve around themselves or along a certain track. However, few studies are dedicated to safety design or health monitoring of RS. In this paper, a wireless dynamic sensing system is developed for RS, and field tests toward a large revolving auditorium are conducted accordingly. At first, a wheel-rail problem is proposed: The internal force redistributes in RS, which is due to wheel-rail irregularity. Then the development of the sensing system for RS is presented. It includes system architecture, network organization, vibrating wire sensor (VWS) nodes and online remote control. To keep the sensor network identifiable during revolving, the addresses of sensor nodes are reassigned dynamically when RS position changes. At last, the system is mounted on a huge outdoor revolving auditorium. Considering the influence of the proposed problem, the RS of the auditorium has been designed conservatively. Two field tests are conducted via the sensing system. In the first test, 2000 people are invited to act as the live load. During the revolving process, data is collected from RS in three different load cases. The other test is the online monitoring for the auditorium during the official performances. In the end, the field-testing result verifies the existence of the wheel-rail problem. The result also indicates the dynamic sensing system is applicable and durable even while RS is rotating.

N-isopropyl acrylamide/sodium acrylate hydrogel as draw agent for forward osmosis to concentrate esterification wastewater

Yan Le,Yanbin Yun,왕만상,Wenli Liu,Shuangshuang Dong,Kai Yang,Syed Taj Ud Din,Woochul Yang,Guicheng Liu 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.5

In recent years, a temperature-sensitive hydrogel was reported as a promising draw agent in forward osmosis (FO) technology. PEG, acts as porogen, as an enabler to improve the swelling property of hydrogels. From FO test, the addition of porogen to the hydrogel can improve the water flux of FO by increasing the swelling properties of the hydrogel. And the hydrogel modified with porogen improves the concentration efficiency of wastewater from 1.09 to 1.124 times, indicating that the modification of the hydrogel by the porogen has positive significance for FO technology. In this study, an advanced hydrogel was synthesized via physical copolymerization by using N-isopropylacrylamide and sodium acrylate. The internal structure was investigated by SEM test where it was found that that porogens have different mechanisms of action on hydrogel performance: Porogen affects the swelling property of hydrogel by changing the internal network structure through physical “occupation”. The effect of porogen concentration is to act on the porosity of hydrogel, while the main effect of the molecular weight of porogen on the hydrogel structure is by altering the pore size.

A Rapid Locating Protocol of Corrupted Data for Cloud Data Storage

( Guangwei Xu ),( Yanbin Yang ),( Cairong Yan ),( Yanglan Gan ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.10

The verification of data integrity is an urgent topic in remote data storage environments with the wide deployment of cloud data storage services. Many traditional verification algorithms focus on the block-oriented verification to resolve the dispute of dynamic data integrity between the data owners and the storage service providers. However, these algorithms scarcely pay attention to the data verification charge and the users` verification experience. The users more concern about the availability of accessed files rather than data blocks. Moreover, the data verification charge limits the number of checked data in each verification. Therefore, we propose a mixed verification protocol to verify the data integrity, which rapidly locates the corrupted files by the file-oriented verification, and then identifies the corrupted blocks in these files by the block-oriented verification. Theoretical analysis and simulation results demonstrate that the protocol reduces the cost of the metadata computation and transmission relative to the traditional block-oriented verification at the expense of little cost of additional file-oriented metadata computation and storage at the data owner. Both the opportunity of data extracted and the scope of suspicious data are optimized to improve the verification efficiency under the same verification cost.

Superhydrophobic ceramic hollow fiber membrane planted by ZnO nanorod-array for high-salinity water desalination

Wang, Tao,Yun, Yanbin,Wang, Manxiang,Li, Chunli,Liu, Guicheng,Yang, Woochul Elsevier 2019 JOURNAL- TAIWAN INSTITUTE OF CHEMICAL ENGINEERS Vol.105 No.-

<P><B>Abstract</B></P> <P>To solve the problems of membrane material tolerance and membrane fouling, a micro/nano hierarchial structure with low surface energy was constructed above the exterior surface of a ceramic hollow fiber membrane using ZnO nanorod arrays and 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PDTS) coatings, which make it superhydrophobic and self-cleaning. The surface morphology, chemical functional groups, and water contact angel of the modified membranes were identified. The results show that large quantity of ZnO nanorods possess desirable characteristics (<I>i.e.</I> superhydrophobicity, exceptional thermal and mechanical stability, and water contact angle of 160.12°) were detected on the ceramic membrane. The novel membrane shows excellent self-cleaning performance and good desalination ability in the utilization of vacuum membrane distillation (VMD) system for high-salinity water desalination.</P> <P><B>Highlights</B></P> <P> <UL> <LI> • Ceramic membrane is modified by imitating of superhydrophobic biological surfaces. </LI> <LI> • The micro/nano hierarchical structure with low surface energy endows the superhydrophobicity. </LI> <LI> • The P-ZN-CHF membrane obtains antifouling ability. </LI> <LI> • The modified membrane shows excellent performances during vacuum membrane distillation. </LI> </UL> </P>

Nanoscale Drug Delivery Systems: A Current Review on the Promising Paclitaxel Formulations for Future Cancer Therapy

Ru Fang,Shaozong Yang,Yanbin Wang,Hua Qian 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.5

"Paclitaxel (PTX) is usual for the treatment of a variety of malignancies, however, its applications are greatly limited due to its poor water solubility. Over the past years, there has been a considerable research interest in the area of nanoscale drug delivery systems (DDSs) as carrier for PTX due to their solubilization, safety, targeting and controlled release. There are many different types and shapes of nanoscale DDSs that have been prepared to deliver PTX, including nanoliposome, lipid nanoemulsion, nanosuspension, nanocapsule, nanofiber, nanotube, nanopolymersome, micelle and nanoparticle (NP). Nanascale DDSs can be based on lipids, proteins, polysaccharides, polymers or other materials. The recent strategic developments of PTX formulation have been discussed with emphasis on lipid-, polymer- and protein-based nanoscale DDSs. Here we focus on the comparative analysis of the preparation, morphology, solubilization, targeting, penetrability, controllability and efficacy profile of various PTX-loaded nanoscale DDSs, which were reported in the different researches. Meanwhile the advantages and disadvantages are also discussed for each type of DDS. Furthermore, the current review embodies an in-depth discussion of human serum albumin (HSA) NP formulation, which showed significantly great efficacy and low toxicity. All the information obtained in this review might shed light on designing new and better nanoscale PTX formulations for potential anticancer applications in the clinic."