The Future Development of Chinese Enterprises In Northeast Asian Era

Liu Junsheng 韓國經營史學會 2014 經營史學 Vol.72 No.-

Northeast Asian Era is not a vision but impending reality, which is shown by tangible facts including institutional and functional practices. As a kind of external limited condition, Northeast Asian Era will bring about challenges and opportunities for Chinese enterprises like a double-bladed sword, exerting far-reached impacts on Chinese enterprises including their future competitiveness, technology innovation, industry escalation, and ownership and governance reforms. The tasks ahead for Chinese enterprises are to give priority to technology advancements, to active participate financial cooperation and to open the reform of ownership and governance of enterprises to foreigners, etc.

Panorama Measurement Based on Spherical Projective Geometry

Shuai Liu,Lingli Zhao,Junsheng Li 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.2

Previous panoramic studies focused on image stitching and the panoramic camera development. In recent years, people began to focus on panoramic scalability issues, the existed methods adopt traditional photogrammetric methods for data processing based on a multi-directional panorama images, using a large number of control points and combined bundle adjustment. Indeed, panorama itself is a kind modeling method, it is completely unnecessary to reconstruct the panoramic entire scene for measurement. So in this paper, we focus on a kind of panorama measurement from spherical projective geometry we studied and constructed the relative, absolute orientation and measurable algorithms based on spherical stereo pair panorama in order to achieve panoramic measurement in the process of panorama roaming. The experiment shows that the approach is much validated, and something useful is obtained.

Optimum path-tracking control for inverse problem of vehicle handling dynamics

Yingjie Liu,Junsheng Jiang 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.8

A method based on optimal control theory is presented in this paper to solve path-tracking problems in inverse vehicle handling dynamics. The idea behind is to identify the optimal steering torque input along a prescribed path to generate an expected trajectory that guarantees minimum clearance. Based on this purpose, the path-tracking problem, treated as an optimal control problem, is first converted into a nonlinear programming problem by Gauss pseudospectral method (GPM) and is then solved with Sequential quadratic programming (SQP). Finally, a real vehicle test is executed to verify the rationality of the proposed model and methodology. Results show that the minimum lateral position error of the generated path-tracking trajectory can be a good solution for path-tracking problem in inverse vehicle handling dynamics for GPM. The algorithm has higher calculation accuracy compared with other methods to solve pathtracking problems. The study could help drivers identify safe lane-keeping trajectories and areas easily.

Numerical Simulation of Temperature Effects on Mechanical Behavior of the Railway Tunnel in Tibet

Shouhua Liu,Jinyang Fu,Junsheng Yang,Han Feng 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.12

Under the influence of plate collision, the high geothermal is a widespread phenomenon within the region of Tibet. Due to the aforementioned high geothermal, lining cracking is a common disaster in Sangzhuling tunnel during construction period. This paper presented the mechanical behaviour of tunnel lining under high geothermal temperature, which is studied by thermo-mechanical numerical method. The results both from field investigation and numerical analysis demonstrate that high geothermal temperature can cause the tunnel lining cracking and the variation of the stress of the tunnel lining. Thus, a novelty sandwich composite lining supporting scheme is proposed to overcome such geothermal temperature effects, in which a thermal insulation layer between primary supporting and secondary supporting is designed. The numerical analysis results indicate that the insulation layer can significantly improve the mechanical characteristics of the lining structure. In addition, the effect of the insulation layer is not linear with its thickness. For this reason, the optimuminsulation thickness of the insulation layer is chosen as 0.06 m, which was optimized by a numerical parametric analysis. The research can provide a reliable reference for tunnelling works in high geothermal regions.

Cenozoic tectonic evolution in the western Qaidam Basin inferred from subsurface data

Yadong Wang,Junsheng Nie,Tao Zhang,Guoqiang Sun,Xin Yang,Yuhu Liu,Xingwang Liu 한국지질과학협의회 2010 Geosciences Journal Vol.14 No.4

It is an agreement that collision of Indian and Asian plates causes uplift of the Tibet Plateau. However, great controversy exists about uplifting history and mechanisms of the Tibetan Plateau. Uplift history of the Tibetan Plateau has been well recorded in the Qaidam Basin, located in the northern margin of the Tibet Plateau. In this paper, we recognize and classify faults recorded by subsurface seismic data in the western Qaidam Basin. In addition, we reconstruct the Cenozoic deformation history of the Qaidam Basin based on balanced section of 5 seismic profiles. The results indicates that 1) Faults in the western Qaidam Basin can be classified as growth faults and non-growth faults, and the growth faults could be divided into three subcategories. 2) According to timing and manner of fault activities, faults and strata in the western Qaidam Basin could be divided into two structural layers: the lower (Lulehe Fm-Xia Youshashan Fm) and the upper (Shang Youshashan Fm-Qigequan Fm) layer. 3) The western Qaidam Basin has experienced two intensive tectonic deformations: the first phase occurs at 43.8−22 Ma (Middle Eocene−Early Miocene), which reached peak at 31.5 Ma (Early Oligocene); the second phase occurred between 14.9 and 0 Ma (Middle Miocene−Present), and the second phase is stronger than the first phase. Recognizing early fault activities confirm previous results that northern Tibet has sensed collision between the India and the Asia shortly after the collision. However, our results here emphasize that the northern Tibet has experienced another phase of shortening and uplift in the late Neogene. It was the two-stage tectonic activities that work together to produce the current Tibetan Plateau.

Sensorless Control of PMSG for A Wind Power System Based on CSC

MAO Meiqin,LIU Fuyan,MU Junsheng,XU Bin 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5

This paper presents sensorless rotor-flux-oriented control algorithms for the PMSG used in the direct drive wind generation system with a back-to-back current source converter. The proposed algorithms are based on phase-lock-loop and model reference adaptive system methods. These algorithms are analyzed, compared and verified by the simulation and experiment. The simulation and experiment results show that the PLL method is simpler, but more accurate, and has a faster dynamic performance than MRAS method.

Low initial human papillomavirus viral load may indicate worse prognosis in patients with cervical carcinoma treated with surgery

Ting Deng,Yanling Feng,Junsheng Zheng,Qidan Huang,Jihong Liu 대한부인종양학회 2015 Journal of Gynecologic Oncology Vol.26 No.2

Objective: To evaluate the prognostic implication of human papillomavirus (HPV) viral load in cervical cancer patients whounderwent radical hysterectomy. Methods: We conducted a retrospective review of patients with stage IA2 through stage IIIA cervical carcinoma who underwentradical hysterectomy at Sun Yat-sen University Cancer Center between January 2005 and December 2009. Patients who hadundergone preoperative hybrid capture 2 testing to detect HPV DNA were included. A total of 346 patients positive for HPVDNA were enrolled and stratified into two groups according to the median HPV viral load. Results: HPV viral load was significantly correlated with lymphovascular space invasion (p=0.026) and deep stromal invasion(p=0.024). However, other factors, such as age, stage, histologic grade, histologic type, lymph node metastasis, and tumor size,were not significantly associated with viral load. Low HPV viral load was correlated with poor disease-free survival in univariateanalysis (p=0.037) and multivariate analysis (p=0.027). There was no significant difference in overall survival with regard to initialHPV viral load. Conclusion: Low initial HPV viral load may be a poor prognostic factor for cervical cancer patients who have undergone radicalhysterectomy.

Complexity based Sensing Strategy for Spectrum Sensing in Cognitive Radio Networks

( Kewen Huang ),( Yimin Liu ),( Yuanquan Hong ),( Junsheng Mu ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.9

Spectrum sensing has attracted much attention due to its significant contribution to idle spectrum detection in Cognitive Radio Networks. However, specialized discussion is on complexity-based sensing strategy for spectrum sensing seldom considered. Motivated by this, this paper is devoted to complexity-based sensing strategy for spectrum sensing. Firstly, three efficiency functions are defined to estimate sensing efficiency of a spectrum scheme. Then a novel sensing strategy is proposed given sensing performance and computational complexity. After that, the proposed sensing strategy is extended to energy detector, Cyclostationary feature detector, covariance matrix detector and cooperative spectrum detector. The proposed sensing strategy provides a novel insight into sensing performance estimation for its consideration of both sensing capacity and sensing complexity. Simulations analyze three efficiency functions and optimal sensing strategy of energy detector, Cyclostationary feature detector and covariance matrix detector.

Development of Key Technologies and Robotics for Intelligent Apple Harvesting

Jinxing Wang,Jingwei Sun,Yi Liu,Junsheng Liu,Guangze Zhao 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11

Performances of Concrete Columns with Modular UHPC Permanent Formworks Under Axial Load

Yibo Yang,Baixi Chen,Yong Chen,Huanyang Zhou,Fucai Liu,Xiangming Xie,Junsheng Chen,Wenying Guo,Hengchang Wang 한국콘크리트학회 2023 International Journal of Concrete Structures and M Vol.17 No.5

This research proposed the modular prefabricated permanent formwork system made of ultra-high-performance concrete (UHPC). Two kinds of modular formwork shapes were designed: the flat formwork and the ribbed. The experimental investigation on the axial compression performance of the composite columns that consist of the normal strength concrete (NSC) core and the modular UHPC permanent formwork was demonstrated. Compared with the flat formwork, the ribbed formwork exhibited better bonding with the NSC core. As observed from the test results, the composite column with the ribbed formwork presented a similar axial behavior as the NSC column with a slight improvement in ultimate loads. Therefore, the modular UHPC ribbed permanent formwork could be regarded as the additional cover to the conventional NSC column. In addition, the finite element analysis (FEA) model was also developed to simulate the composite columns numerically. The predicted capacities agreed with the experimental results, which validated the numerical models. The crack pattern estimated by the FEA model revealed that the interaction between the permanent formwork and the inner concrete introduced many tiny cracks to the concrete core. However, as protected by the UHPC permanent formwork, the overall durability of the composite columns can still be enhanced.