The Enhancement of Handling Stability for Driver-combined-vehicle Systems Through Adaptive Steering Controller

Jing-Hong Li,Qiang Wang,Gao-Hong Yu,Chuanyu Wu 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.1

Drivers who lack sufficient experience would be unable to achieve handling stability due to the variationand dynamics of the combined vehicles (CVs). Drivers face hurdles in the stabilization attempt once these vehiclesare rendered unstable. In this investigation, the use of the behavior of real vehicles to track the desired properties ofthe developed combined vehicles can help maintain good handling stability despite the present varying dynamics. This paper provides an appropriate design method for CVs to gain suitable handling property for such vehicles. Thedeveloped adaptive steering controller (ASC) allows the tracking of the desired vehicle by the real vehicle, despitethe variation of parameter and lack of information of the real vehicle. Simulation results are obtained to validate thatthe handling stability was improved by using one design parameter, which minimizes frequency oscillation causedin the wheel steering angles. The introduction of a driver model that can simulate the real vehicle demonstrated thatthe adoption of the ASC is useful in the driver-tractor-semitrailer system

Alveolar bone thickness around maxillary central incisors of different inclination assessed with cone-beam computed tomography

Yu-lou Tian,Fang Liu,Hong-jing Sun,Pin Lv,Yu-ming Cao,Mo Yu,Yang Yue 대한치과교정학회 2015 대한치과교정학회지 Vol.45 No.5

Objective: To assess the labial and lingual alveolar bone thickness in adults with maxillary central incisors of different inclination by cone-beam computed tomography (CBCT). Methods: Ninety maxillary central incisors from 45 patients were divided into three groups based on the maxillary central incisors to palatal plane angle; lingual-inclined, normal, and labial-inclined. Reformatted CBCT images were used to measure the labial and lingual alveolar bone thickness (ABT) at intervals corresponding to every 1/10 of the root length. The sum of labial ABT and lingual ABT at the level of the root apex was used to calculate the total ABT (TABT). The number of teeth exhibiting alveolar fenestration and dehiscence in each group was also tallied. One-way analysis of variance and Tukey’s honestly significant difference test were applied for statistical analysis. Results: The labial ABT and TABT values at the root apex in the lingual-inclined group were significantly lower than in the other groups (p < 0.05). Lingual and labial ABT values were very low at the cervical level in the lingual-inclined and normal groups. There was a higher prevalence of alveolar fenestration in the lingual-inclined group. Conclusions: Lingual-inclined maxillary central incisors have less bone support at the level of the root apex and a greater frequency of alveolar bone defects than normal maxillary central incisors. The bone plate at the marginal level is also very thin.

Preparation and properties of cement based piezoelectric composites modified by CNTs

Hong-Yu Gong,Yu-Jun Zhang,Jing Quan,Songwei Che 한국물리학회 2011 Current Applied Physics Vol.11 No.3

In this study, cement based piezoelectric composites have been prepared from Portland cement with the addition of 70 vol.% of PZT powders and various amounts of modified CNTs ranging from 0 to 1.3 vol.%. The CNTs act as a conductive filler dispersed in the cement matrix, improving the poling efficiency of the composites and enabling the poling process to be carried out at room temperature, in contrast to the 120 ℃ required for the PZT/cement composites without CNTs. The addition of CNTs significantly enhanced the piezoelectric properties of the composites. With a CNT content of 0.3 vol.%, the CNTs/PZT/cement composite showed the highest piezoelectric strain factors (d_33) of 62 pC/N and piezoelectric voltage factors (g_33) 60 × 10^-3 Vm/N, which are the promising characteristics for its potential use in the smart civil engineering structures.

Glulathione-S-transferases Gene Polymorphism in Prediction of Gastric Cancer Risk by Smoking and Helicobacter Pylori Infection Status

Jing, Chen,Huang, Zhi-Jie,Duan, Yu-Qin,Wang, Pei-Hong,Zhang, Ru,Luo, Ke-Shu,Xiao, Xin-Rong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7

Aim: To evaluate the association of glutathione S-transferases gene polymorphisms with the risk of gastric cancer, with reference to smoking and Helicobacter pylori infection. Methods: We conducted a 1:1 matched case-control study with 410 gastric cancer cases and 410 cancer-free controls. Polymorphisms of GSTM1, GSTT1 and GSTP1 were determined using PCR-CTPP. Results: The GSTM1 and GSTT1 null genotypes were significantly associated with the risk of gastric cancer after adjusting for potential confounding factors (OR=1.68, 95% CI=1.32-2.23 for null GSTM1, OR=1.73; 95% CI=1.24-2.13 for null GSTT1). The combination of null GSTM1 and null GSTT1 conferred an elevated risk (OR=2.54, 95% CI=1.55-3.39). However, no association was found for GSTP1 polymorphism The smoking modified the association of GSTM1 and GSTT1 null genotypes with the risk of gastric cancer. Conclusion: GSTM1 and GSTT1 null genotypes are associated with increased risk of gastric cancer, and smoking modifies the association.

Bone Formation in Ectopic and Osteogenic Tissue Induced by a Novel BMP-2-related Peptide Combined with Rat Tail Collagen

Jing-Feng Li,Zhen-Yu Lin,Qi-Xin Zheng,Xiao-Dong Guo,Shu-Hua Yang,Hong-Wei Lu,Sheng-Hui Lan 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.5

Bone morphogenetic proteins (BMPs) play an important role in regulating osteoblast differentiation and subsequent bone formation, mainly evidenced by the induced osteogenic ability of BMP-2 from BMPs. However, BMP-2 alone does not induce the expected efficacy due to its short retention in vivo. In this study, a novel BMP-2-related peptide (designated P24) derived from the “knuckle epitope”of BMP-2 was coupled covalently to type I collagen derived from rat tail and observed under scanning electron microscopy (SEM) in low vacuum mode. The BMP-2-related peptide/collagen composite was implanted in vivo into the pocket of the quadriceps musculature of Sprague-Dawley (SD) rats and then harvested 3 or 6 weeks after surgery. It was found that lyophilized collagen retained a porous network structure with an average inner-diameter of 90 ~ 160 μm. Based on radiographic evaluation and histological examination, BMP-2-related peptide/collagen induced significant ectopic bone formation compared to that of rat tail collagen alone as a control. Our results indicate collagen served as a good carrier for newly synthesized BMP-2-related peptide and that the BMP-2-related peptide/collagen composite was an effective substitute in bone tissue engineering.

The Influence of Prayer Movement on Body Composition and Cardiovascular Functions of College Students

Yu-Hu Lv(루이후),Lin Cheng(쳉린),Hong-Jun Liu(리홍준),Yuan Yang(양원),Jing-Quan Sun(선징콴) 한국웰니스학회 2019 한국웰니스학회지 Vol.14 No.2

기도 운동이 대학생의 신체구성과 심혈관 기능에 미치는 영향을 평가했다. 방법: 피험자들은 5주 동안 주 3회, 108 동작을 총 1,620회 기도 운동에 참여했다. 결과적으로 피험자 사지와 몸통의 체지방률이 감소했으며(P<0.05), 오른쪽 상지를 제외하고 뚜렷한 통계적 차이를 보였다(P<0.05). 근육량은 증가하였으며, 왼쪽 하체가 유의하게 높아졌다(P<0.05). 심근사용률, 심근혈액공급률, 혈관수용성, 혈액량효율성, 미세순환률은 증가하였으나 통계적으로 유의하지 않았다. MOCI, MOC, CMBN, MSP, MDP, MAP, TPR, SPR, VEF, WBV, RWBV, MHUT, ADT 은 모두 떨어졌다. MDP, MAP, RWBV, MHUT, ADT는 유의한 차이를 나타냈다 (P<0.05). 대예배 운동은 대학생의 신체성분을 개선하고, 신체 각 부위의 각 지방의 함량을 줄이고, 근육의 함량을 증가시켰다. 또한 심장혈관과 미세순환 기능을 개선하여 심혈관 기능을 향상시켰다. Objective: To understand the influence of the prayer movement on the body composition and cardiovascular function of college students. Methods: The Subjects were trained for 5 weeks, 3 times a week, with 108 prayer movements each time, and a total of 1620 prayer sessions per week. Results: The fat content of the limbs and trunk decreased, except that of the right upper extremity, while the other limbs and trunk showed significant differences (P<0.05). The muscle content increased, with that of the left lower limb showing significant increase. (P<0.05). The heart muscle utilization rate(HMUR), myocardial blood supply rate (MBSR), vascular compliance(VC), effective blood volume(EBV), and micro-circulation half update rate(MHUR) were increased, but they did not show significant difference. Other levels such as myocardial oxygen consumption index(MOCI), myocardial oxygen consumption(MOC), myocardial blood requirements(CMBN), mean systolic pressure(MSP), mean diastolic pressure(MDP), mean arterial pressure(MAP), total peripheral resistance(TPR), standard peripheral resistance(SPR), left ventricular ejection fraction(VEF), whole blood viscosity(WBV), reduced whole blood viscosity(RWBV), micro-circulation half update time(MHUT), and average detention time(ADT) were all declined. Among them, MDP, MAP, RWBV, MHUT, and ADT showed significant difference(P<0.05). Conclusion: For college students, the prayer movement can improve body composition, reduce the fat content in various parts of the body, increase the muscle content, improve the cardiovascular and micro-circulation functional status, and enhance the cardiovascular functions.

A passive vibration isolator with bio-inspired structure and inerter nonlinear effects

Jing Bian,Xu-hong Zhou,Ke Ke,Michael CH Yam,Yu-hang Wang,Yue Qiu 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.88 No.3

This paper developed and examined a novel passive vibration isolator (i.e., “X-inerter”) motivated by combining a bio-inspired structure and a rack-pinion inerter. The bio-inspired structure provided nonlinear stiffness and damping owing to its geometric nonlinearity. In addition, the behavior was further enhanced by a gear inerter that produced a special nonlinear inertia effect; thus, an X-inerter was developed. As a result, the X-inerter can achieve both high-static-low-dynamic stiffness (HSLDS) and quasi-zero stiffness (QZS), obtaining ultra-low frequency isolation. Furthermore, the installed inerter can produce a coupled nonlinear inertia and damping effect, leading to an anti-resonance frequency near the resonance, wide isolation region, and low resonance peak. Both static and dynamic analyses of the proposed isolator were conducted and the structural parameters' influence was comprehensively investigated. The X-inerter was proven to be comparatively more stable in the ultra-low frequency than the benchmarking QZS isolator due to the nonlinear damping and inertia properties. Moreover, the inertia effect could suppress the bio-inspired structure's super- and sub-harmonic resonance. Therefore, the X-inerter isolator generally possesses desirable nonlinear stiffness, nonlinear damping, and unique nonlinear inertia, designed to achieve the ultra-low natural frequency, the anti-resonance property, and a wide isolation region with a low resonance peak.

The Porcine FoxO1, FoxO3a and FoxO4 Genes: Cloning, Mapping, Expression and Association Analysis with Meat Production Traits

Yu, Jing,Zhou, Quan-Yong,Zhu, Meng-Jin,Li, Chang-Chun,Liu, Bang,Fan, Bin,Zhao, Shu-Hong Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.5

FoxO1, FoxO3a and FoxO4 belong to the FoxO gene family, which play important roles in the PI3K/PKB pathway. In this study, we cloned the porcine FoxO1, FoxO3a and FoxO4 sequences and assigned them to SSC11p11-15, SSC1p13 and SSC xq13 using somatic cell hybrid panel (SCHP) and radiation hybrid panel (IMpRH). RT-PCR results showed that these three genes are expressed in multiple tissues. Sequencing of PCR products from different breeds identified a synonymous T/C polymorphism in exon 2 of FoxO3a. This FoxO3a single nucleotide polymorphism (SNP) can be detected by AvaII restriction enzyme. The allele frequencies of this SNP were investigated in Dahuabai, Meishan, Tongcheng, Yushan, Large White, and Duroc pigs. Association of the genotypes with growth and carcass traits showed that different genotypes of FoxO3a were associated with carcass length and backfat thickness between 6th and 7th ribs (BTR) and drip loss (p<0.05).

Structure and Properties of Polyimide (BTDA-TDI/MDI co-polyimide) Fibers Obtained by Wet-Spinning

Hong Bing Xiang,Zhong Huang,Li Qi Liu,Lei Chen,Jing Zhu,Zu Ming Hu,Jun Rong Yu 한국고분자학회 2011 Macromolecular Research Vol.19 No.7

BTDA-TDI/MDI (P84, synthesized by the condensation of 2,4-diisocyanato-1-methylbenzene and 1,1' -methylenebis(4-isocyanatobenzene) with 5,5'-carbonylbis(l,3-isobenzofurandione)) co-polyimide fibers were prepared by wet-spinning. The basic spinning conditions were found from the studies of dope viscosity, ternary phase diagrams, coagulation value, and precipitation value. The effect of the coagulation bath composition on the morphology of as-spun fibers was investigated and a theoretical approach was used to understand the coagulation phenomena. Scanning electron microscopy (SEM) showed that the cross-sectional shape of the fiber deviated more from an ellipse shape with the increasement of N-methyl-2-pyrrdidinone (NMP) content. The surface and cross section morphology of the as-spun fibers was also analyzed by the rate of diffusion and phase separation. The as-spun fibers were treated in heating tubes without drawing at different temperatures. The gravimetric analysis spectra showed that the BTDA-TDI/MDI co-polyimide fibers, which had been heat treated at 350 and 400 ℃, possessed better thermal properties than the as-spun fibers, a large weight loss was observed only above 550 ℃. Heat treatment of the fibers resulted in relatively high tensile strength and modulus. The fibers spun in Bath C (70/30, NMP/water, wt/wt)and Bath D (80/20, NMP/water, wt/wt) showed better thermal properties and higher tensile strength.

중국 본토, 진폐증이 없는 석탄분진 근로자의 '삶의 질'

Yu, Hong-Mei,Ren, Xiao-Wei,Chen, Qian,Zhao, Jing-Yi,Zhu, Ting-Juan,Guo, Zhi-Xi 대한산업보건협회 2009 산업보건 Vol.250 No.-