A Network Partition Approach for MFD-Based Urban Transportation Network Model

( Haitao Xu ),( Weiguo Zhang ),( Zuozhang Zhuo ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.11

Recent findings identified the scatter and shape of MFD (macroscopic fundamental diagram) is heavily influenced by the spatial distribution of link density in a road network. This implies that the concept of MFD can be utilized to divide a heterogeneous road network with different degrees of congestion into multiple homogeneous subnetworks. Considering the actual traffic data is usually incomplete and inaccurate while most traffic partition algorithms rely on the completeness of the data, we proposed a three-step partitioned algorithm called Iso-MB (Isoperimetric algorithm - Merging - Boundary adjustment) permitting of incompletely input data in this paper. The proposed algorithm was implemented and verified in a simulated urban transportation network. The existence of well-defined MFD in each subnetwork was revealed and discussed and the selection of stop parameter in the isoperimetric algorithm was explained and dissected. The effectiveness of the approach to the missing input data was also demonstrated and elaborated.

Full closed loop‑based dynamic accuracy enhancement for elastic joints

Haitao Liu,Yan Wang,Xianlei Shan 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.6

Owing to the elasticity of transmission systems, actuated joints suff er from dynamic errors that seriously aff ect the tracking accuracy. Mainly drawing on the full closed loop control strategy, this paper focuses on the dynamic accuracy enhancement of elastic joints. Having proposed a simplifi ed dynamic error modelling method for elastic joints with cascade control, an analytical dynamic error model of the servo drive system is built, allowing the revelation of the infl uence mechanisms of semi- and full closed loop control schemes on dynamic errors. The dynamic error model indicates that a full closed loop control scheme with a large position loop gain can eff ectively reduce the elasticity-caused dynamic error. To overcome the strict limitation on the position loop gain of traditional full closed loop control, an additional speed feedback is used to improve the dynamic error reduction capability. Experimental results show that the dynamic error can be dramatically reduced, resulting in a remarkable improvement of tracking accuracy of elastic joints.

BRAF-Activated Long Noncoding RNA Modulates Papillary Thyroid Carcinoma Cell Proliferation through Regulating Thyroid Stimulating Hormone Receptor

Haitao Zheng,Meng Wang,Lixin Jiang,Haidi Chu,Jinchen Hu,Jinyao Ning,Baoyuan Li,Dong Wang,Jie Xu 대한암학회 2016 Cancer Research and Treatment Vol.48 No.2

Purpose The importance of long noncoding RNAs (lncRNAs) in tumorigenesis has recently been demonstrated. However, the role of lncRNAs in development of thyroid cancer remains largely unknown. Materials and Methods Using quantitative reverse transcription polymerase chain reaction, expression of three lncRNAs, including BRAF-activated long noncoding RNA (BANCR), papillary thyroid cancer susceptibility candidate 3 (PTCSC3), and noncoding RNA associated with mitogen-activated protein kinase pathway and growth arrest (NAMA), was investigated in the current study. Results Of the three lncRNAs (BANCR, PTCSC3, and NAMA), expression of BANCR was significantly up-regulated while PTCSC3 and NAMA were significantly down-regulated in papillary thyroid carcinoma (PTC) compared to that in normal tissue. BANCR-knockdown in a PTC-derived cell line (IHH-4) resulted in significant suppression of thyroid stimulating hormone receptor (TSHR). BANCR-knockdown also led to inhibition of cell growth and cell cycle arrest at G0/G1 phase through down-regulation of cyclin D1. In addition, BANCR was enriched by polycomb enhancer of zeste homolog 2 (EZH2), and silencing BANCR led to decreased chromatin recruitment of EZH2, which resulted significantly reduced expression of TSHR. Conclusion These findings indicate that BANCR may contribute to the tumorigenesis of PTC through regulation of cyclin D1 and TSHR.

Micro-/Nanocombined Gas Sensors With Functionalized Mesoporous Thin Film Self-Assembled in Batches Onto Resonant Cantilevers

Haitao Yu,Pengcheng Xu,Xiaoyuan Xia,Dong-Weon Lee,Xinxin Li IEEE 2012 IEEE transactions on industrial electronics Vol.59 No.12

<P>This paper reports a novel top-down/bottom-up combined resonant microcantilever chemical sensor, where the nanosensing material of a functionalized mesoporous thin film (MTF) is directly self-assembled on the sensing region of the integrated microcantilever. By using the batch-producible nano-on-micro construction technique, a large number of such sensors can be batch fabricated with uniform performance and low cost. More importantly, the sensing molecule terminals can be simultaneously constructed at the pore inner surface when the MTF is directly grown on the cantilever. With -NH<SUB>2</SUB>-group-functionalized MTF directly grown onto the surface of the cantilever free end, the micro-/nanocombined gravimetric sensor has experimentally exhibited quick response and highly sensitive detection of CO<SUB>2</SUB> gas.</P>

Construction of Cognitive Radio Based Emergency Communication System and Application Scenario Analysis

Haitao Wang,Hui Chen,Shicai Zhu,Lihua Song 보안공학연구지원센터 2013 International Journal of Smart Home Vol.7 No.3

Hierarchical Architectures of PMMA/MWNT-NH2 Particles: A Material for Enhanced Volatile Organic Compound Sensing Performance

Haitao Li,Yang Sun,최형진,Siqin Zhao 한국고분자학회 2018 Macromolecular Research Vol.26 No.9

Hierarchical architectures of poly(methyl methacrylate) (PMMA)/aminofunctionalized multi-walled carbon nanotube (MWNT-NH2) particles were prepared, in which the electrical conductive network was constructed on the surface of PMMA microspheres. The morphology, composition, and electrical conductivity of the particles were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and four-probe electrical conductivity measurement. The PMMA/MWNT-NH2 transducers were exposed to each ethanol, water, toluene, and chloroform for volatile organic compounds (VOCs) sensing detection. The particles showed excellent sensitivity, good reversibility, and a strong response compared to the raw MWNTs and MWNT-NH2. This was attributed not only to the formation of a charge transmission path on the particle surface, but also to the interaction between the vapor molecules and functionalized MWNTs. The enhanced sensing performance of the PMMA/MWNT-NH2 particles suggests that it is a good candidate for the preparation of electronic noses for disease diagnostics and VOCs detection.

User Identity Authentication Based on the Combination of Mouse and Keyboard Behavior

Haitao Tang,Wang Mantao 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6

In order to improve the recognition rate of user identity authentication system, a user identity authentication method based on the combination of mouse and keyboard behavior is proposed. First of all, the characteristics of the two indicators of the mouse and keyboard are extracted, and then realizing the use of support to the rationale for the establishment of an identity authentication device, and finally test through a number of user identification and authentication. The results show that this method can improve the recognition rate of the user identity authentication, which greatly reduces the error rate and rejection rate and the results are obviously superior to the traditional method.

Wind engineering for high-rise buildings: A review

Haitao Zhu,Bin Yang,Qilin Zhang,Licheng Pan,Siyuan Sun 한국풍공학회 2021 Wind and Structures, An International Journal (WAS Vol.32 No.3

As high-rise buildings become more and more slender and flexible, the wind effect has become a major concern to modern buildings. At present, wind engineering for high-rise buildings mainly focuses on the following four issues: wind excitation and response, aerodynamic damping, aerodynamic modifications and proximity effect. Taking these four issues of concern in high-rise buildings as the mainline, this paper summarizes the development history and current research progress of wind engineering for high-rise buildings. Some critical previous work and remarks are listed at the end of each chapter. From the future perspective, the CFD is still the most promising technique for structural wind engineering. The wind load inversion and the introduction of machine learning are two research directions worth exploring.

Detection of Corner Event Based on Hidden Markov Model in Soccer Video

Haitao Yang,Jia Wang,Jingmeng Sun 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.12

A corner event detection method based on HMM (Hidden Markov Model) in soccer videos. Through analysis of the semantic structure of corner events, define and extract six multi- modal semantic clues to describe shot sequences, which constitute observation sequences as the HMM model input. By the iterative training of the HMM model and the continuous optimization of model parameters, construct the HMM model of corner events. From two aspects of audio and video, dig the inherent pattern of corner events and realize corner events automatic detection based on HMM accurately. The experimental results show that the present method achieves 89.6% recall and 96.3% precision, which has the better performance.

Effects of Traditional Chinese Cooking Methods on Formation of Heterocyclic Aromatic Amines in Lamb Patties

Haitao Guo,Zhenyu Wang,Han Pan,Xin Li,Li Chen,Weili Rao,Yuan Gao,Dequan Zhang 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.3

Different amounts of the potent mutagenic and/or carcinogenic heterocyclic aromatic amines (HAAs) areformed in muscle-based foods under different cookingmethods. HAAs (9 varieties) in lamb patties cooked usingtraditional Chinese cooking methods (roasting, frying, panfrying,and stewing in seasonings) were investigated. Thetotal HAAs contents in roasted, fried, pan-fried, and stewedpatties were 4.39-123.15 ng/g, 3.59-43.24 ng/g, 0.71-10.05ng/g, and 51.07-120.32 ng/g, respectively. Amounts of HAAsincreased as cooking time increased. 2-amino-1-methyl-6-phenylimidazo [4,5-b] pyridine (PhIP) was the dominantHAAs in deep roasted and fried samples, while 1-methyl-9H-pyrido [3,4-b] indole (Harman) and 9H-pyrido [3,4-b]indole (Norharman) were the main HAAs in pan-fried andstewed samples. Types and contents of HAAs formed atdifferent cooking times using different methods are unique. Stewing in seasoning generated a higher HAAs contentthan the high-temperature cooking methods roasting,frying, and pan-frying.