Analysis on the Game of Co-opetition of ports in the China Yangtze Delta -Taking Shanghai port and Ningbo-Zhoushan port as an example

Shao, Yan-Bo Korean Institute of Navigation and Port Research 2012 한국항해항만학회지 Vol.36 No.2

Due to rapid growth of economy in the world, which results into shipping goods flow one place to another in large volumes, the competition becoming more intense among ports. Shanghai port and Ningbo-Zhoushan port are the two most important ports in the Yangtze River Delta and have the same economic hinterland, inevitably there is a heated competition between the two ports. This paper using the approach of SWOT to analyze the issue of competition and cooperation between the two ports, and then makes an analysis of their Co-opetition strategies by employing the analyzing methods based on the Game theory. Finally, it puts forward some strategies to enhance the cooperation between the two ports.

Time-related Mapping of Quantitative Trait Loci Controlling Dry Matter Accumulation and Partitioning in Rice

Shao Bo Li,Zhi Hong Zhang,Shao Qing Li,Yang Sheng Li,You Lin Zhu,Ying Guo Zhu 한국유전학회 2008 Genes & Genomics Vol.30 No.4

Grain yield is a result of dry matter accumulation and partitioning in rice (Oryza sativa L.). To characterize the genetic basis of dynamics of traits representing dry matter accumulation and partitioning as well as their relationships with each other, composite interval mapping of quantitative trait loci (QTL) was conducted based on time-related phenotypic data obtained from a population of 258 recombinant inbred lines (F12), which was derived from a cross between Lemont (japonica var.) and Teqing (indica var.). A total of twenty-three QTL were identified for leaf weight, stem weight and panicle weight at four measuring stages after heading. However, these three dynamic traits were observed to be controlled by different QTL (genes) at different growth stages. An extreme example was that at least three types of QTL (genes) might be involved in the development of panicle weight. Growth duration, which is closely related to dry matter accumulation and partitioning, was also identified to be significantly affected by four QTL. The close correlations among the studied four traits were explained to some extent by six co-located QTL. Nevertheless, it would be of great importance to distinguish the pleiotropic or linked effects of the co-located QTL. In addition, the chromosome regions or QTL identified in this study were compared with those previously reported for the same or related traits with the same RIL population.

Experimental and numerical analysis of fatigue behaviour for tubular K-joints

Shao, Yong-Bo,Cao, Zhen-Bin Techno-Press 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.19 No.6

In this paper, a full-scale K-joint specimen was tested to failure under cyclic combined axial and in-plane bending loads. In the fatigue test, the crack developments were monitored step by step using the alternating current potential drop (ACPD) technique. Using Paris' law, stress intensity factor, which is a fracture parameter to be frequently used by many designers to predict the integrity and residual life of tubular joints, can be obtained from experimental test results of the crack growth rate. Furthermore, a scheme of automatic mesh generation for a cracked K-joint is introduced, and numerical analysis of stress intensity factor for the K-joint specimen has then been carried out. In the finite element analysis, J-integral method is used to estimate the stress intensity factors along the crack front. The numerical stress intensity factor results have been validated through comparing them with the experimental results. The comparison shows that the proposed numerical model can produce reasonably accurate stress intensity factor values. The effects of different crack shapes on the stress intensity factors have also been investigated, and it has been found that semi-ellipse is suitable and accurate to be adopted in numerical analysis for the stress intensity factor. Therefore, the proposed model in this paper is reliable to be used for estimating the stress intensity factor values of cracked tubular K-joints for design purposes.

An Anisotropic Heat Transfer Model for Turbulent Recirculating Flows

Shao Bo Jia,B. T. F. Chung 대한기계학회 1998 Heat transter conference Vol.3 No.1

Experimental and Numerical Investigation on Stiffened Rectangular Hollow Flange Beam

Yong-Bo Shao,Hazem Samih Mohamed,Li Wang,Cheng Song Wu 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.5

Cold-formed thin-walled steel hollow fl ange beam (HFB) has been emerged and utilised structurally. It is composed of one or two closed fl anges with high torsional stiff ness and relatively fl exible web. Hence, the global stability of such beam has greatly been improved compared with conventional I-beams with fl at fl anges, due to their superior torsional stiff ness and stability. However, under concentrated loading, local fl ange deformation occurs easily at the load-action-region, because the tubular fl ange is hollow even if stiff eners are attached to the webs. Up-to-date, rather than fi lling the tubular fl ange with concrete, there is not any relevant literature or reports on how to improve the local buckling state of the hollow fl ange I-beams. Accordingly, in this paper, a stiff ened compression rectangular hollow fl ange beam (SCHFB) is presented, from which the web penetrates the bottom wall of the top tubular fl ange until it reaches its top wall. By doing so, several concentrated loads may be applied safely on the beams or the segmental lunching technique may successfully be used to erect the beam in its place. This paper examines experimentally this stiff ened beam and then extends to use the fi nite element modelling to replicate the actual behaviour of the beam. A numerical comparison between the SCHFB, conventional CHFB and I-beam shows that the ultimate bearing capacity and ductility are signifi cantly enhanced in the case of SCHFB compared with the other two beams. Additionally, the SCHFB has been found to own better local deformation performance than that of the CHFB. However, with the span increase, the vertical concave deformation, lateral deformations at top fl ange and vertical deformations of top fl ange plate of the tubes of the SCHFB and CHFB may approach each other. So, the SCHFB becomes the best choice for short-span beams under either concentrated or distributed loading.

Static strength of collar-plate reinforced tubular T-joints under axial loading

Yong-Bo Shao 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.21 No.2

To study the effect of collar-plate reinforcement on the static strength of tubular T-joints under axial loading, fundamental research work is carried out from both experimental test and finite element (FE) simulation. Through experimental tests on 7 collar-plate reinforced and 7 corresponding un-reinforced tubular T-joints under axial loading, the reinforcing efficiency is investigated. Thereafter, the static strengths of the above 14 models are analyzed by using FE method, and it is found that the numerical results agree reasonably well with the experimental data to prove the accuracy of the presented FE model. Additionally, a parametric study is conducted to analyze the effect of some geometrical parameters, i.e., the brace-to-chord diameter ratio <i>β</i>, the chord diameter-to-chord wall thickness ratio 2<i>γ</i>, collar-plate thickness to chord wall thickness ratio <i>τ</i>_c, and collar-plate length to brace diameter ratio <i>l_c</i>/<i>d</i>1, on the static strength of a tubular T-joint. The parametric study shows that the static strength can be greatly improved by increasing the collar-plate thickness to chord wall thickness ratio <i>τ</i>_c and the collar-plate length to brace diameter ratio <i>l_c</i>/<i>d</i>1. Based on the numerical results, parametric equations are obtained from curving fitting technique to estimate the static strength of a tubular T-joint with collar-plate reinforcement under axial loading, and the accuracy of these equations is also evaluated from error analysis.

Prediction on Static Strength for CHS Tubular K-joints at Elevated Temperature

Yong-Bo Shao,Shubin He,Dongping Yang 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.3

This study presents a design method for predicting the static strength of a Circular Hollow Section (CHS) tubular K-joint at elevated temperature. The presented method is obtained based on a parametric study by the authors (He et al., 2015a). In determining the static strength of a tubular K-joint at elevated temperature, a deforming rate criterion is proposed, and it is proved to be much safer and more reasonable for design purposes rather than the conventional definition on that static strength by using 3% of chord ovalisation for the K-joint at ambient temperature. In the presented design method, a strength reduction factor k is proposed, and the static strength of a CHS K-joint at elevated temperature can be obtained simply by multiplying the static strength at ambient temperature with k. The strength reduction factor k is a product of two factors, a revised reduction factor of elastic modulus (λ) and a revised chord stress ratio ( ). From the finite element results of overall 57 K-joint models, the accuracy of the presented design method is assessed to be reliable and accurate.

Terahertz Spectral Characteristics of Electrolyte Solutions under Different Magnetic Fields

Siyu Shao,Haiyun Huang,Bo Peng,Guoyang Wang,Ping Ye,Jiahui Wang,Bo Su,Hailin Cui,Cunlin Zhang 한국광학회 2022 Current Optics and Photonics Vol.6 No.3

Microfluidic chips are new devices that can manipulate liquids at the micrometer level, and terahertz (THz) time-domain spectroscopy has good applicability in biochemical detection. The combination of these two technologies can shorten the distance between sample and THz wave, reduce THz wave absorption by water, and more effectively analyze the kinetics of biochemical reactions in aqueous solutions. This study investigates the effects of different external magnetic field intensities on the THz transmission characteristics of deionized water, CuSO 4 , CuCl 2 , (CH 3 COO) 2 Cu, Na 2 SO 4 , NaCl, and CH 3 COONa; the THz spectral intensity of the sample solutions decrease with increasing intensity of the applied magnetic field. Analysis shows that the magnetic field leads to a change in the dipole moment of water molecules in water and electrolyte solutions, which enhances not only the hydrogen-bond networking ability of water but also the hydration around ions in electrolyte solutions, increasing the number of hydrogen bonds. Increasing the intensity of this magnetic field further promotes the hydrogen-bond association between water molecules, weakening the THz transmission intensity of the solution.

Experimental and numerical analysis of fatigue behaviour for tubular K-joints

Yong-Bo Shao,Zhen-Bin Cao 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.19 No.6

In this paper, a full-scale K-joint specimen was tested to failure under cyclic combined axialand in-plane bending loads. In the fatigue test, the crack developments were monitored step by step usinga fracture parameter to be frequently used by many designers to predict the integrity and residual life oftubular joints, can be obtained from experimental test results of the crack growth rate. Furthermore, ascheme of automatic mesh generation for a cracked K-joint is introduced, and numerical analysis of stressintegral method is used to estimate the stress intensity factors along the crack front. The numerical stressintensity factor results have been validated through comparing them with the experimental results. Thecomparison shows that the proposed numerical model can produce reasonably accurate stress intensityinvestigated, and it has been found that semi-ellipse is suitable and accurate to be adopted in numericalanalysis for the stress intensity factor. Therefore, the proposed model in this paper is reliable to be usedfor estimating the stres intensity factor values of cracked tubular K-joints for design purposes.

Analysis on the Game of Co-opetition of ports in the China Yangtze Delta : Taking Shanghai port and Ningbo-Zhoushan port as an example

Yan-Bo Shao 한국항해항만학회 2012 한국항해항만학회지 Vol.36 No.2

Due to rapid growth of economy in the world, which results into shipping goods flow one place to another in large volumes, the competition becoming more intense among ports. Shanghai port and Ningbo-Zhoushan port are the two most important ports in the Yangtze River Delta and have the same economic hinterland, inevitably there is a heated competition between the two ports. This paper using the approach of SWOT to analyze the issue of competition and cooperation between the two ports, and then makes an analysis of their Co-opetition strategies by employing the analyzing methods based on the Game theory. Finally, it puts forward some strategies to enhance the cooperation between the two ports.