Logical Connectivity Prediction Models for VANET based on Nonlinear Regression and ELM : An Example of the AODV Protocol

Haiqing Liu,Licai Yang,Sijing Ding,Yunfeng Shi 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.6

Differing from the physical connectivity of the topology structure, the logical connectivity of VANET considers both the interior network configuration and the external communication environment. Hence, the traditional mathematical analysis and modeling methods which are usually used in physical connectivity research are no longer suitable for the logical connectivity prediction. Taking the AODV protocol as an example, this paper simulates the effects of different road traffic parameters on logical connectivity probability and selects three main effect factors, roadway length, vehicle number and vehicle speed. Furthermore, the inner relation between the logical connectivity and the three road traffic parameters is studied based on data mining technique and then two logical connectivity prediction models are presented, the nonlinear regression-based model and the extreme learning machine-based model. Simulation results show that the two models are both with high accuracy in predicting the network logical connectivity under different road traffic environments.

Identification of QTLs associated with the anaerobic germination potential using a set of Oryza nivara introgression lines

Licheng Liu,Xiaoxiang Li,Sanxiong Liu,Jun Min,Wenqiang Liu,Xiaowu Pan,Baohua Fang,Min Hu,Zhongqi Liu,Yongchao Li,Haiqing Zhang 한국유전학회 2021 Genes & Genomics Vol.43 No.4

Background Rice (Oryza sativa L.) is an important crop and a staple food for half of the population around the world. The recent water and labor shortages are encouraging farmers to shift from traditional transplanting to direct-seeding. However, poor germination and slow elongation of the coleoptile constrains large-scale application of direct-seeding. Objective Thisstudy was aimed to investigate the genetic basis of the anaerobic germination(AG) potential using a set of Oryza nivara (O. nivara) introgressionlines (ILs). Methods Inthis study, a total of 131 ILs were developed by introducing O. nivara chromosomesegments into the elite indica rice variety 93-11 through advanced backcrossingand repeated selfng. A high-density genetic map has been previouslyconstructed with 1,070 bin-markers. The seeds of ILs were germinated and usedto measure coleoptile length under normal and anaerobic conditions. QTLsassociated with AG potential were determined in rice. Results Basedon the high-density genetic map of the IL population, two QTLs, qAGP1 and qAGP3 associated with AG tolerance were characterized and locatedon chromosomes 1 and 3, respectively. Each QTL explained 15% of the phenotypic variance.Specifcally, the O. nivara-derived chromosomesegments of the two QTLs were positively tolerance to anaerobic condition byincreasing coleoptile length. In a further analysis of public transcriptomedata, a total of 26 and 36 genes within qAGP1 and qAGP3 were transcriptionallyinduced by anaerobic stress, respectively. Conclusions Utilizationof O. nivara-derived alleles at qAGP1 and qAGP3 can potentially enhance tolerance to anaerobic stress at thegermination stage in rice, thereby accelerating breeding of rice varieties tobe more adaptative for direct-seeding.

A Sub-Harris Operator Coupled with SIFT for Fast Images Matching in Low-altitude Photogrammetry

Haiqing He,Xiaoyong Chen,Bo Liu,Zhiyong Lv 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.3

Experimental Study on Cyclic Lateral Loaded Circular CFST Members with Initial Imperfections

Haiqing Zhu,Hang Zhang,Linshuang Liu 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.8

To study the influence of an initial imperfection on the cyclic performance of concrete-filled steel tubular (CFST) members, twelve specimens were cast with different notch lengths, notch widths, notch orientations and notch locations. These specimens were implemented in a lateral quasi-static test, and the test details, damage modes, load-deflection responses and strain histories were detailed and recorded. The measured and theoretical equivalent elastic flexural stiffness, displacement ductility coefficient, maximum lateral load, and measured and theoretical bending capacity of all the specimens were collected and analysed. The research results showed that all specimens mainly experienced flexural damage with different damage levels. Good agreement was observed between the measured and theoretical elastic flexural stiffness as well as the bending capacity for the intact specimens (specimen 1 and specimen 2). The mid-span notch weakened the equivalent elastic flexural stiffness, displacement ductility and flexural capacity of the CFST specimens. Furthermore, a horizontal mid-span notch resulted in greater impact on the specimen behaviour than a vertical notch or a quarter-span notch, an observation that deserves particular attention.

Investigation on the 3D Ground Settlement Induced by Shallow Tunneling considering the Effects of Buildings

Haiqing Yang,Fang Liu,Shaoze Lin 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.2

Complex tunneling process will inevitably result in varying degrees of ground movements. Prediction of ground movements is an essential part of planning, design and construction of a tunneling project. To address the predicting difficulty of ground movement, a correction parameter is introduced to the traditional ground movement solution both under two-dimensional and three-dimensional conditions on basis of the principle of conservation of ground loss. And the surface settlement caused by radial contraction of tunnel under different buried depth and excavation length, and induced by the action of building are studied through a series of model experiments. The experimental results show that the settlement value of any point along the middle line of the tunnel, is only about 50% of the measured value, which verify the necessity for correcting the tradition solutions. In addition, the applicability of the modified solution for different buried depth of tunnel axis under two-dimensional and three-dimensional conditions is also verified. Considering the uneven load distribution in the underlying soil caused by building load, we also introduced a load correction parameter and compared the modified solutions with the elastic analysis solution and the Peck formula. The comparison indicates that the modified solutions of two dimensions and three dimensions are more consistent with the experimental results, especially for the 3D surface settlement solution with large excavation length. And according to the results, the modified solution is more suitable to analyzing the surface settlement under the action of building load than previous modification, which further confirms the correction solutions to be an improvement to a close-form solution for ground surface settlement.

Ring-Opening Polymerization of $\varepsilon$-Caprolactone and Cyclohexene Oxide Initiated by Aluminum $\beta$-Ketoamino Complexes: Steric and Electronic Effect of 3-Position Substituents of the Ligands

Liu, Binyuan,Li, Haiqing,Ha, Chang-Sik,Kim, Il,Yan, Weidong The Polymer Society of Korea 2008 Macromolecular Research Vol.16 No.5

A series of aluminum complexes supported by $\beta$-ketoamino, ligand-bearing, 3-position substituents $LAlEt_2$ ($L=CH_3C(O)C(Cl)=C(CH_3)NAr\;(L_1)$, $L=CH_3C(O)C(H)=C(CH_3)NAr\;(L_2)$, $L=CH_3C(O)C(Ph)=C(CH_3)NAr\;(L_3)$, and $L=CH_3C(O)C(Me)=C(CH_3)NAr\;(L_4)$, $Ar=2,6-^iPr_2C6H_3$) were synthesized in situ and employed in the ring-opening polymerization (ROP) of $\varepsilon$-caprolactone ($\varepsilon$-CL) and cyclohexene oxide (CHO). The 3-position substituents on the $\beta$-ketoamino ligand backbone of the aluminum complexes influenced the catalyst activity remarkably for both ROP of $\varepsilon$-CL and CHO. Aluminum $\beta$-ketoamino complexes displayed different catalytic behavior in ROP of $\varepsilon$-CL and CHO. The order of the catalytic activity of $LAlEt_2$ was $L_1AlEt_2$>$L_2AlEt_2$>$L_3AlEt_2$>$L_4AlEt_2$ for ROP of $\varepsilon$-CL, being opposite to the electron-donating ability of the 3-position substituents on the $\beta$-ketoamino ligand, while the order of the catalytic activity for ROP of CHO was $L_1AlEt_2$>$L_3AlEt_2$>$L_4AlEt_2$>$L_2AlEt_2$. The effects of reaction temperature and time on the ROP were also investigated for both $\varepsilon$-CL and CHO.

Effect of Saccharomyces cerevisiae boulardii on sows’ farrowing duration and reproductive performance, and weanling piglets’ performance and IgG concentration

( Haiqing Sun ),( Fernando Bravo De Laguna ),( Shuai Wang ),( Fengju Liu ),( Liang Shi ),( Haidi Jiang ),( Xiaoxia Hu ),( Peng Qin ),( Jiajian Tan ) 한국축산학회 2022 한국축산학회지 Vol.64 No.1

We studied the effects of Saccharomyces cerevisiae boulardii CNCM I-1079 (LSB) supplemented to lactating sows on reproductive traits and farrowing duration and to piglets from day 7 of life on post-weaning performance and IgG concentration. Ninety-six Landrace × Yorkshire sows started the trial 5 days before the expected farrowing date. Sows were distributed into 2 groups according to parity number and backfat thickness: control (CON: regular lactation diet) and LSB (CON + LSB at 2 × 10⁹ colony forming units [CFU]/kg of feed). Seven days after birth, litters were randomly selected from each group and supplemented creep feed with or without LSB at 2 × 10⁹ CFU/kg. At weaning, piglets from CON sows were shifted to a commercial farm and allocated to 14 pens in groups of 25 piglets/pen according to the creep feed supplemented during lactation. Piglets followed a 3-phase feeding program: creep, pre-starter and starter, with or without LSB at 2 × 10⁹ CFU/kg LSB in creep and pre-starter, and 1 × 10⁹ CFU/kg LSB in starter. The piglets were vaccinated against classical swine fever on days 41 and 72 of life. One day before each vaccination and at the end of the trial, blood samples were collected from 15 randomly selected piglets per treatment and assessed for total IgG. Supplemented sows with non-supplemented litters displayed the lowest backfat thickness loss during lactation (p < 0.05). The LSB supplementation shortened farrowing duration (p < 0.05) and increased feed intake (p < 0.05) during the first week of lactation. The LSB-fed piglets were heavier at the end of creep (p < 0.05), pre-starter (p < 0.05), and the trial (p < 0.05); grew faster during creep (p < 0.05), starter (p < 0.05), and overall (p < 0.05); and displayed an improved feed conversion ratio during creep (p < 0.05). Total IgG content was higher at days 40 (p < 0.05) and 71 (p < 0.05) in LSB-fed piglets. We conclude that supplementing sows with Saccharomyces cerevisiae boulardii CNCM I-1079 from late gestation until weaning shortens farrowing duration, increases feed intake, and minimizes backfat losses during lactation. When supplemented to piglet diet, post-weaning performance is improved. This improvement observed could be linked to a better immune status, as suggested by the higher IgG.

Experimental Research and Finite Element Analysis on Structural Stability of Disc-Buckle Type Formwork Support

Jinfeng Dong,Haiqing Liu,Shengyong Xia,Yang Cheng,Ming Lei,Zimu Chen 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.3

In order to study the structural stability of the disc-buckle type formwork support, the multi-parameter experimental analysis of the disc-buckle type formwork support structure was carried out by using experimental and fi nite element analysis method. The infl uence parameters of working conditions, lift height, diagonal bracing and sleeve on the structural stability bearing capacity was mainly considered. The regularity of the buckling direction of the vertical pole, the stress at each typical position on the vertical pole and the axial force of the vertical pole was studied based on the experimental results. Based on the characteristics of semi-rigid connection joints, the correctness of the experimental results was verifi ed by fi nite element analysis, and the results show that reducing lift height and arranging diagonal bracing have remarkable infl uence on improving the structural stability bearing capacity. The usage of sleeves has little infl uence on the structural stability, and the corner pole was the worst position of the overall structural stability. The factors of working conditions and diagonal bracing have the remarkable infl uence on the buckling direction of the vertical pole. The factor of working condition has the most obvious infl uence on the stress uniformity of the vertical pole. The axial force of the vertical pole in the disc-buckle type formwork support structure presented a relatively uniform state from bottom to top in the loading process. The arrangement of diagonal bracing and the usage of sleeves have an infl uence on the uniformity of the axial force of the vertical pole. Compared with the fi nite element results, the error of the structural stability bearing capacity was within 6%, indicated that the fi nite element can accurately simulate the structural stability bearing capacity.

An Automatic Urban Function District Division Method Based on Big Data Analysis of POI

( Hao Guo ),( Haiqing Liu ),( Shengli Wang ),( Yu Zhang ) 한국정보처리학회 2021 Journal of information processing systems Vol.17 No.3

Along with the rapid development of the economy, the urban scale has extended rapidly, leading to the formation of different types of urban function districts (UFDs), such as central business, residential and industrial districts. Recognizing the spatial distributions of these districts is of great significance to manage the evolving role of urban planning and further help in developing reliable urban planning programs. In this paper, we propose an automatic UFD division method based on big data analysis of point of interest (POI) data. Considering that the distribution of POI data is unbalanced in a geographic space, a dichotomy-based data retrieval method was used to improve the efficiency of the data crawling process. Further, a POI spatial feature analysis method based on the mean shift algorithm is proposed, where data points with similar attributive characteristics are clustered to form the function districts. The proposed method was thoroughly tested in an actual urban case scenario and the results show its superior performance. Further, the suitability of fit to practical situations reaches 88.4%, demonstrating a reasonable UFD division result.

Molecularly Imprinted Polymer Coating with Fluorescence on Magnetic Particle

Jing Huang,Haiqing Liu,Haifen Men,Yunyun Zhai,Qihui Xi,Zulei Zhang,Jian Zhang,Zhengzhi Yin,Lei Li 한국고분자학회 2013 Macromolecular Research Vol.21 No.9

In this research, molecular imprinting technology was employed to prepare magnetic, fluorescent molecularly imprinted polymer microspheres (fluorescent M-MIP) for recognition and separation of endocrine disrupting chemicals. The fluorescent M-MIP were prepared using Fe3O4@SiO2 magnetic nanoparticles combined with fluorescein (isothiocyanate) as fluorescent material with the surface molecularly imprinting method. The magnetic fluorescent molecularly imprinted polymers were characterized by fluorescence spectrophotometer, X-ray powder diffraction,vibration sample magnetic field meter, scanning and transmission electron microscopic methods. The results showed that the fluorescent M-MIP not only had excellent superparamagnetism and maintained the crystalline structure of the magnetic nanoparticles, but also stable fluorescence. The recognition selectivity of the magnetic fluorescence polymer was studied for template molecule and analogues. The results indicated that the fluorescent quenches of bisphenol A (the selective target) for fluorescent M-MIP were higher than that of the structural analogues, which illustrated the recognition selectivity for bisphenol A. Simultaneously, the fluorescent magnetic non-imprinted polymers (M-NIPs) had much higher fluorescent quenches than the fluorescent M-NIPs in the processes of rebinding. Therefore, the fluorescent M-MIP technology can be used for the recognition, magnetic separation and detection of bisphenol A by fluorescence spectrometry without any time-consuming elution.