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The reasonable cable force is the key factor for the safe use of cable-stayed bridge. This paper adopts the method of continuous beam on rigid supports, zero displacement method and the internal force balanced method for cable force estimation of completion stage. The estimation value of cable force is determined by comprehensive considering various methods. With the estimate value as the initial cable force of feasible domain method, conducting the cable force optimization. Comparing the optimization with estimation value and conducting analysis calculation to ensure the rational completion status. Referring a cable-stayed bridge’s example, and conducting the estimation and optimization of cable force, the calculated results meet the requirements. The results show that the method is effective and practical.

The tight rock often has low porosity, low permeability and poor pore connectivity, which it is difficult for formation evaluation. Nuclear Magnetic Resonance (NMR) logging is widely used in fluid typing and reservoir parameters determination to provide the information of porosity, permeability and pore size distribution. NMR relaxation mechanisms are characterized by the pore-scale petrophysical models. Monte Carlo algorithm describes the Brownian motion of fluid molecules in pore space. In the paper we setup a 3D digital core of the tight sandstone with X-ray computer tomography (CT) images to model NMR response with Monte Carlo random walk algorithm. We compared T2 distributions from the numerical calculated pulse echo trains from the measurements. The results show that the simulated NMR response is consisted with the experiment.

By taking the 3D Laplace equation as the basic governing equation, a mathematical model with respect to the interaction between linear waves and arbitrary 3D structures was founded. With an example of wave action with four cylinders, numerical results show that when incident wave direction is 22.5°, wave force Fx on 1# cylinder and 2# cylinder is the biggest and when incident wave direction is 0°, wave force Fx on 3# cylinder and 4# cylinder is the biggest; wave force Fy and the wave height on origin point increases with incident wave direction increasing for the given layout and incident wave conditions.

The coupling beam work as an important component in coupled shear walls, the strength,stiffness and deformation properties of which have great influence on the seismic performance of shear walls, the steel plate reinforced concrete coupling beams have the advantages as follows: simplify the constructional details, make the construction convenient and reliable performance [1][2]. The numerical simulation model in this paper is a coupled shear wall connected by steel plate reinforced concrete coupling beams in reference [3], and the loading mode is the same as the reference [4] . The relative stiffness effect was explored by study the internal force and displacement of the model with changing the stiffness of the coupling beams and the shear walls while the span-depth ratio is stable .The study will provide a reference for the numerical simulation of the finite element simulation analysis of the coupling beams and the steel reinforced concrete structures.

A three-dimensional physical model was used to study the wave distribution around breakwater in Malaysia Penang. Model tests were carried out by using the L-type action absorption directional wave generator in a 45m×40m wave basin at TIWTE in Tianjin China. The incident wave conditions were checked first in the laboratory and a series steps were introduced to construct the bathymetry and breakwater structure. By comparing the test results, the improved top elevation of breakwater is +4.5m, and the recommendation length of northern part of breakwater is 65m.

In this paper, a novel heuristic algorithm named Multivariant Optimization Algorithm (MOA) is presented to solve the 0-1 Knapsack Problem (KP). In MOA, multivariant search groups (locate and global search groups) execute the global exploration and local exploitation iteratively to locate the optimal solution automatically. The presented algorithm has been compared with Genetic Algorithm (GA) and Particle swarm algorithm (PSO) based on five data sets, results show that the optimization of MOA is better than GA and PSO when the dimension of problem is high.

The fuzzy-PI dual-mode control was designed and applied to control speed loop in feed system of ADGM25 to improve its response characteristic and stability. In order to observe its control ability, the fuzzy - PI dual-mode control and PI control were adopted respectively. The simulation of the feed system was finished by using MATLAB/Simulink. The results show that the control performance of fuzzy - PI dual-mode control is better than the performance of conventional PI control, the maximum over-shoot and setup time decreased by 13%,0.05s respectively.

In this paper, a heuristic Multivariant Optimization Algorithm (MOA), which has the ability to locate multiple optima through alternating global-local search iterations by multivariant search groups including global exploration groups and local exploitation groups based on a structure where the optimizing process is saved, is described in detail. The performances of MOA are compared with that of other heuristic algorithms including GA and PSO based on six benchmark functions and the experiment results indicate that MOA outperforms GA and PSO in success rate and convergence efficiency on multimodal functions.

Multivariant Optimization Algorithm (MOA) is a newly proposed algorithm and its multi-group property make it a perfect choice for multimodal optimization. In this paper, an absorption mechanism was introduced into MOA to remove the redundant search information that stored in the structure and we named the proposed algorithm as the Absorption Multivariant Optimization Algorithm (AMOA). With this mechanism, more search information will be captured and the search information will be shared more effectively. The proposed algorithm is tested on nine benchmark functions to compare the performance with standard MOA under the same condition. The experimental results suggest that the improved algorithm can keep high success rate as the number of global optima increase and the output result would be more stable.

As a new intelligent material, IPMC (Ionic polymer-metal composite) can be driven under low voltage with large deformation, and has been widely used in biomedical and robotic systems. Traditional IPMC testing system is bulky, high cost, and inconvenient to use. In order to achieve the portability and convenience of the IPMC testing system, a small and low-cost IPMC tester was designed. The power supply and control system of the tester were integrated into an IPMC electrode clamp. The main research work included control system circuit design, electrode clamp and overall exterior design. The displacement measurement results showed that the design for the IPMC tester was correct and feasible.

Ionic polymer metal composite actuators (IPMCs), a new kind of smart material, have taken much attention as suitable candidates for the next generation actuators, micro-electromechanical systems, medical devices and micro air vehicles. In this paper, a new kind of IPMCs was developed by incorporating sulfonated poly (styrene-co-maleic anhydride) (SSMA) into the Nafion structure to overcome some of the major drawbacks of traditional electro-active polymers. The results show that the ion exchange capacity and water uptake ratio of the SSMA-Nation membrane increased dramatically. Compared with general IPMCs, the maximum bending displacement and the maximum blocking force of the SSMA-reinforced IPMCs improved greatly: the 1 wt.% SSMA-IPMC exhibited the maximum bending displacement of 11 mm up to 1.4 times, while the 5 wt.% SSMA-IPMC exhibited the maximum blocking force of 26 mN up to 1.2 times.

Ionic polymer-metal composite (IPMC) is a new kind of electroactive polymer with the advantages of low driving voltage and large bend, which has shown great potential for practical applications. In this paper, IPMC was fabricated by casting and electroless plating. Using the as-fabricated IPMC, a linear actuator was designed to transform bending motion of a cantilever IPMC into straight line motion. The linear actuator's output displacement and blocking force were investigated on a test apparatus. The results showed that the mechanism design for the linear actuator was feasible.

By taking the 3D Laplace equation as the basic governing equation, a mathematical model with respect to the interaction between linear waves and arbitrary 3D structures was founded. For the example of wave action with three cylinders, numerical results show that wave force Fx decrease and wave force Fy increase in each cylinder by incident wave direction from 0° to 60°; wave height on origin point increases with incident wave direction increasing for given layout and incident wave conditions.

DCell has been proposed for enormous data centers as a server centric interconnection which can support millions of servers with high network capacity and provide good fault tolerance by only using commodity switches. In this paper, we study an attractive algorithm of finding Hamilton paths in dimensional. The time complexity of this algorithm is , where is the node number of DCellk .

This paper describes a numerical method for solving the unsteady Euler equation at any speed. In the process of calculating Euler's equation, the control equation in orthogonal curvilinear coordinate system is discretized by the finite -volume scheme based on the center-difference method, and convection flux used Jameson central deference scheme was solved at every pseudo time step, and the Runge-Kutta method, dual-time algorithm and the implicit LU-SGS add preconditioning algorithm are used for time-marching. For obtaining the numerical solution of two-dimensional unsteady flow around a cylinder and the flow of the Convex Hull, finding that the calculated results agree well with literature values and theoretical analytical solution.

There is a well-known conjecture on independent spanning trees (ISTs) on graphs: For any n-connected graph G with n≥1, there are n ISTs rooted at an arbitrary node on G. It still remains open for n≥5. We propose an integrated algorithm to construct n ISTs rooted at any node similar to 0 or 10n-1 on n-dimensional HCH cube for n≥1 and give the simulations of ISTs on several special BC networks, such as HCH cubes, crossed cubes, Möbius cubes, twisted cubes, etc.

In order to improve the control accuracy and response speed of the intelligent vehicle steering system, a DC-motor controlled steering system using an IPC (Industrial personal computer) is designed. The hardware of the system is developed by analyzing the dynamic steering model. A new control method of Fuzzy-PID controller with RSDA (Rough Set Data Analysis) is proposed. Experimental results using the proposed control strategy show better performance and robust properties than the ordinary Fuzzy-PID.

In order to test and verify the feasibility of the 5 roped new flexible safety fence posted with I-shaped cross section. So the full—scale impact test was studied. Four mainly aspects of the preparation for full—scale impact test study, testing and data collection, testing results and data analysis , conclusion were stated. The results show that the various elements of the new flexible safety fence meet the evaluation criteria, the maximum dynamic deformation is short, and it is no obvious stumbling resistance to the testing vehicles.

With the finite elements analysis and topological optimization algorithm, the head structure of four-wheel independent drive pure electric vehicle is regarded as optimization objective. The vehicle’s head structure is optimized by LS-DYNA and LS-TASC on the condition that whether considering the compatibility constraint. The mass fraction curve, the mass distribution convergence curve and optimization results are used to analyze the influence of vehicle structure when considering crash compatibility, and verify that good crash compatibility means homogeneous geometric structure and homogeneous impact force in contact surface.

This study is based on UG and finite element simulation software VPG and LS-DYNA to simulate,finally get how the automotive quality,impact speed and angle influence on rounded cutting edge rules of CST and collision characteristics .So provide a strong basis to the application of CST and car safety.

To study the ship collision security of Xiangjiang bridge, this paper base on the risk assessment criteria of the AASHTO guide. First of all, annual frequency of Xiangjiang bridge element collapse is calculated by using the method of AASHTO guide; Furthermore, the safety of the Xiangjiang bridge is evaluated in according to AASHTO Guide. Calculation and analysis results show that Annual frequency of Xiangjiang bridge element collapse is more than annual 0.0001.

Existing initiative anti-collision of bridge system was so complex and high costs, so we analysis of various factors of the collision of the bridge, putting forward the key factors of the initiative anti-collision and simplifying the bridge initiative anti-collision model. Furthermore, in the light of the key factors to designed a set of initiative anti-collision safety system for Xingjiang large bridge as an example. Based on the limit of thoughts and ideas, raise the concept of the voyage level of security, and design the work of software process.

In order to identify the crashworthiness of neotype flexible safety fence, methods was created by conducting FEA (finite element analysis) computer simulation and full-scale impact test based on the current available evaluation standard. Above all, the model of “vehicle-guardrail” was set up based on virtual proving ground (VPG) pretreatment software, the safety in the impact between vehicle and neotype flexible safety fence were studied from the aspects of the moving locus of vehicle, the acceleration of vehicle and the maximum lateral displacement of guardrail etc. Secondly, full-scale impact test was conducted for the guidance quality of guardrail to the tested vehicle. The test results indicated that the neotype flexible safety fence was inconspicuous to the tested-car, which was basically the same to the simulation results, and the evaluation parameter of guardrail met the acceptance criteria.

A three-dimensional physical model was used to study the wave distribution around breakwater in Malaysia Kuantan. Model tests were carried out by using the L-type action absorption directional wave generator in a 45m×40m wave basin at TIWTE in Tianjin China. The incident wave conditions were checked first in the laboratory and a series steps were introduced to construct the bathymetry and breakwater structure. At last, the wave distribution around the breakwater with 60yrs and 100yrs wave action were given respectively. The conclusions should be used to achieve optimization of the design.