Baseline-free damage detection method for beam structures based on an actual influence line

Ning-Bo Wang,Wei-Xin Ren,Tian-Li Huang 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.24 No.4

The detection of structural damage without a priori information on the healthy state is challenging. In order to address the issue, the study presents a baseline-free approach to detect damage in beam structures based on an actual influence line. In particular, a multi-segment function-fitting calculation is developed to extract the actual deflection influence line (DIL) of a damaged beam from bridge responses due to a passing vehicle. An intact basis function based on the measurement position is introduced. The damage index is defined as the difference between the actual DIL and a constructed function related to the intact basis, and the damage location is indicated based on the local peak value of the damage index curve. The damage basis function is formulated by using the detected damage location. Based on the intact and damage basis functions, damage severity is quantified by fitting the actual DIL using the least-square calculation. Both numerical and experimental examples are provided to investigate the feasibility of the proposed method. The results indicate that the present baseline-free approach is effective in detecting the damage of beam structures.

Application on Web Page Filtering Technology

Bo Shen,Lei Li,Ning-wei Wang 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.12

Web page filtering technology intends to filter out the large number of the repeated and theme-unrelated noise information and obtain useful information. Some web filtering methods cannot make full use of the layout and visual features. In view of the new mainstream “DIV+CSS” designing style of modern commercial web sites, this paper summarizes that elements laying in the same div blocks have common semantic features and proposed a DIV_FOREST model to represent the web pages. And in combination with the Vision-based Page Segmentation Algorithm, a DVPS Algorithm which considers both layout features and visual features was proposed to improve web page filtering efficiency.

Wavelet-based automatic identification method of axle distribution information

Ning-Bo Wang,Wei-Xin Ren,Zhi-Wei Chen 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.6

Accurately extracting the axle distribution information of a passing vehicle from bridge dynamic responses experiences a key and challenging step in non-pavement bridge weigh-in-motion (BWIM). In this article, the wavelet transformation is adopted and the wavelet coefficient curve is used as a substitute for dynamic response. The driving frequency is introduced and expanded to multi-axle vehicle, and the wavelet coefficient curve on specific scale corresponding to the driving frequency is confirmed to contain obvious axle information. On this basis, an automatic method for axle distribution information identification is proposed. The specific wavelet scale can be obtained through iterative computing, and the false peaks due to bridge vibration can be eliminated through cross-correlation analysis of the wavelet coefficients of two measure points. The integrand function that corresponds to the maximum value of the cross-correlation function is used to identify the peaks caused by axles. A numerical application of the proposed axle information identification method is carried out. Numerical results demonstrate that this method acquires precise axle information from the responses of an axle-insensitive structure (e.g., girder) and decreases the requirement of sensitivity structure of BWIM. Finally, an experimental study on a full-scale simply supported bridge is also conducted to verify the effectiveness of this method.

Surface and foam property of perfluoroalkyl polyoxyethylene ether phosphate salt in aqueous-ethanol system

Bo Ning,Yan Wang,Mi Zhang,Yanyun Bai,Xiumei Tai,Wanxu Wang,Guoyong Wang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-

Foam is used in manyfields with excellent performance. Moreover, disinfectants with ethanol as themain ingredient have increasingly been used in people's lives. However, the foam research of an ethanolwatermixed system is still in the initial stage. In this work, a perfluoroalkyl polyoxyethylene etherphosphate salt surfactant (FEP-Na) was synthesized through a new molecular design. The surfactant hasgood interfacial adsorption behavior in 50% ethanol-water mixing system, and the approximatelyspherical aggregates are observed in the volume phase of the solution. Moreover, FEP-Na showed goodfoaming property in 50% ethanol-water mixed solution. Interestingly, high concentration solutions withhigh surface activity have lower foam stability. And under the microscope, we see that the bubble burst isdominated by the phenomenon of coalescence. In this regard, we explain the mechanism of foamstability by electrostatic double layer theory and interfacial dilation rheology. It provides a new choice forthe synthesis of foaming agent in the ethanol-water mixed system at a concentration of 50%.

한국어와 중국어의 사동구조 대조 -사동화 내포 구조를 중심으로-

왕녕박 ( Wang Ning-bo ),박소영 ( Park So-young ) 서강대학교 언어정보연구소 2016 언어와 정보 사회 Vol.29 No.-

This paper presents a comparative syntactic analysis of Korean and Chinese causatives, based on Pylkkanen(2002)`s parametric theory on causatives. Both languages are identified as voice-splitting languages, in which a Cause head, responsible for introducing a causing event, projects independently from a Voice head introducing an external argument. Also, Korean and Chinese have three types of causatives, which vary depending on the sizes of clauses that can be embedded by a Cause head, namely, a root phrase, a vP, and a phasal VoiceP structure. The presented analysis can be supported by evidence from the retainability of idiomatic interpretations of idioms depending on voice alternations.

Quality of Life of Male Spouse Caregivers for Breast Cancer Patients in China

Zhu, Ping,Fu, Ju-Fang,Wang, Bo,Lin, Jing,Wang, Yan,Fang, Ning-Ning,Wang, Dan-Dan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.10

Background: The aim of this study was to describe the characteristics of male spouse caregivers of breast cancer patients in China, assess their quality of life (QOL), and investigate the influencing factors. Materials and Methods: A total of 243 breast cancer patient-spouse caregiver dyads were recruited from four hospitals in Shanxi and Anhui province of China. A cross-sectional design was applied to collect data and the Chinese version of the Medical Outcomes Study 36-item Short Form (SF-36) was used to measure caregivers' QOL, and the Chinese version of M.D. Anderson Symptom Inventory (MDASI-C) was applied to measure patient symptom severity and interference. Pearson's correlation was used to examine the correlations between caregiver burden and QOL. The multiple regression analysis was used to determine the most predictive factors influencing QOL. Results: The scores of all SF-36 scales were above 50.0, which were much lower than that of general mainland Chinese males. Mental QOL was significantly worse than physical QOL. Spouses demographic characteristics, caregiving-related variables and patient symptoms were related to spouse QOL. Caregiver burden has a negative relationship with QOL. Conclusions: A decrease in life events and patient symptoms, as well as increase in spouse sleeping time and family income, ought to improve QOL.

Resveratrol Exerts Dosage-Dependent Effects on the Self-Renewal and Neural Differentiation of hUC-MSCs

Wang, Xinxin,Ma, Shanshan,Meng, Nan,Yao, Ning,Zhang, Kun,Li, Qinghua,Zhang, Yanting,Xing, Qu,Han, Kang,Song, Jishi,Yang, Bo,Guan, Fangxia Korean Society for Molecular and Cellular Biology 2016 Molecules and cells Vol.39 No.5

Resveratrol (RES) plays a critical role in the fate of cells and longevity of animals via activation of the sirtuins1 (SIRT1) gene. In the present study, we intend to investigate whether RES could promote the self-renewal and neural-lineage differentiation in human umbilical cord derived MSCs (hUC-MSCs) in vitro at concentrations ranging from 0.1 to $10{\mu}M$, and whether it exerts the effects by modulating the SIRT1 signaling. Herein, we demonstrated that RES at the concentrations of 0.1, 1 and $2.5{\mu}M$ could promote cell viability and proliferation, mitigate senescence and induce expression of SIRT1 and Proliferating Cell Nuclear Antigen (PCNA) while inhibit the expression of p53 and p16. However, the effects were reversed by 5 and $10{\mu}M$ of RES. Furthermore, RES could promote neural differentiation in a dose-dependent manner as evidenced by morphological changes and expression of neural markers (Nestin, ${\beta}III-tubulin$ and NSE), as well as pro-neural transcription factors Neurogenin (Ngn)1, Ngn2 and Mash1. Taken together, RES exerts a dosage-dependent effect on the self-renewal and neural differentiation of hUC-MSCs via SIRT1 signaling. The current study provides a new strategy to regulate the fate of hUC-MSCs and suggests a more favorable in vitro cell culture conditions for hUCMSCs-based therapies for some intractable neurological disorders.

Triple-Band Scheduling with Millimeter Wave and Terahertz Bands for Wireless Backhaul

Yibing Wang,Hao Wu,Yong Niu,Jianwen Ding,Shiwen Mao,Bo Ai,Zhangdui Zhong,Ning Wang 한국통신학회 2022 Journal of communications and networks Vol.24 No.4

With the explosive growth of mobile traffic demand, densely deployed small cells underlying macrocells have great potential for 5G and beyond wireless networks. In this paper, we consider the problem of supporting traffic flows with diverse QoS requirements by exploiting three high frequency bands, i.e., the 28 GHz band, the E-band, and the Terahertz (THz) band. The cooperation of the three bands is helpful for maximizing the number of flows with their QoS requirements satisfied. To solve the formulated nonlinear integer programming problem, we propose a triple-band scheduling scheme which can select the optimum scheduling band for each flow among three different frequency bands. The proposed scheme also efficiently utilizes the resource to schedule flow transmissions in time slots. Ex- tensive simulations demonstrate the superior performance of the proposed scheme over three baseline schemes with respect to the number of completed flows and the system throughput.

Backstepping Sliding Mode Trajectory Tracking via Extended State Observer for Quadrotors with Wind Disturbance

Hongbin Wang,Ning Li,Yueling Wang,Bo Su 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.10

To overcome nonlinear, underactuated and external wind disturbances problems for the 6-DOF (degrees of freedom) quadrotor unmanned aerial vehicle (UAV) system, a backstepping sliding mode control algorithm based on high-order extended state observer (ESO) is proposed. Based on the hierarchical control principle, the quadrotor UAV dynamic system is decomposed into position subsystem and attitude subsystem to facilitate the backsteppingcontrol design. Moreover, the EXO is used to estimate the remaining unmeasurable states and the external wind disturbances online. The advantages of the controllers are that they can not only ensure good tracking performance, but also deal with uncertain external disturbances. To imitate the real situation as much as possible, the external wind disturbances are composed of four basic wind models in this paper. The tracking error and estimate error of the design methods are shown to arbitrarily small by using Lyapunov theory. Finally, the effectiveness and superiority of the proposed control algorithm are proved by the simulation.

Hepatic microRNAome reveals potential microRNA-mRNA pairs association with lipid metabolism in pigs

Jingge Liu,Caibo Ning,Bo-jiang Li,Rongyang Li,Wang Jun Wu,Honglin Liu 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.9

Objective: As one of the most important metabolic organs, the liver plays vital roles in modulating the lipid metabolism. This study was to compare miRNA expression profiles of the Large White liver between two different developmental periods and to identify candidate miRNAs for lipid metabolism. Methods: Eight liver samples were collected from White Large of 70-day fetus (P70) and of 70-day piglets (D70) (with 4 biological repeats at each development period) to construct sRNA libraries. Then the eight prepared sRNA libraries were sequenced using Illumina next-generation sequencing technology on HiSeq 2500 platform. Results: As a result, we obtained 346 known and 187 novel miRNAs. Compared with the D70, 55 down- and 61 up-regulated miRNAs were shown to be significantly differentially expressed (DE). Gene ontology and Kyoto encyclopedia of genes and genomes enrichment analysis indicated that these DE miRNAs were mainly involved in growth, development and diverse metabolic processes. They were predicted to regulate lipid metabolism through adipocytokine signaling pathway, mitogen-activated protein kinase, AMP-activated protein kinase, cyclic adenosine monophosphate, phosphatidylinositol 3 kinase/protein kinase B, and Notch signaling pathway. The four most abundantly expressed miRNAs were miR-122, miR-26a and miR-30a-5p (miR-122 only in P70), which play important roles in lipid metabolism. Integration analysis (details of mRNAs sequencing data were shown in another unpublished paper) revealed that many target genes of the DE miRNAs (miR-181b, miR-145-5p, miR-199a-5p, and miR-98) might be critical regulators in lipid metabolic process, including acyl-CoA synthetase long chain family member 4, ATP-binding casette A4, and stearyl-CoA desaturase. Thus, these miRNAs were the promising candidates for lipid metabolism. Conclusion: Our study provides the main differences in the Large White at miRNA level between two different developmental stages. It supplies a valuable database for the further function and mechanism elucidation of miRNAs in porcine liver development and lipid metabolism.