基于5G技术的智能网联汽车发展现状与趋势分析

分析了5G技术与智能网联汽车在发展战略、研究意义和趋势方面的问题;提出了把5G技术与智能网联汽车有机融合,可有利于ICV的规模化、定制化技术架构的完善,以期实现ICV车辆间的信息实时换接、均布负载和信息的抗干扰与安全的构想.进行总结展望.     

公路滑坡预测预报研究现状及前景展望

随着山区公路的大规模建设,滑坡等地质灾害日益严重。针对公路沿线滑坡所独具的特点对其预测预报的理论基础、研究现状进行总结分析,对公路滑坡的发展趋势作了简要评述。     

Trapped waves within the blocking frequency under compressed sea ice and two-dimensional current

The existence of trapped modes due to a horizontal submerged rigid cylinder placed below a compressed ice-covered surface is shown to exist within the frequency band of wave blocking by employing linearized water wave theory and with the inclusion of the effects of a two-dimensional current and the obliqueness of the propagating wave. A new modified multipole expansion method catering to the multiple propagating modes is proposed. The impact of different choices of propagating modes at a fixed frequency within the above-mentioned band on the trapped modes is detailed. Multiple trapped modes whose number depends on the direction and magnitude of the current exist within the frequency band. Out of the three choices of current types considered, while two of them result in the generation of trapped modes for all three possible choices of the propagating wave, the remaining one shows that only one propagating mode can generate a trapped wave. A break in the continuous spectrum of the trapped mode frequency due to the wave blocking and at the point of inflexion is presented. There exists a region of angle of propagation within which an abundance of the trapped mode is shown. The surface profiles for different angles of propagation and choices of propagating modes are illustrated graphically. The trapped modes associated with a higher angle of propagation decay at a faster rate.     

Sea trials of Sigma wave energy converter – slacking and snapping of TLP mooring lines

Sigma Energy has performed its foremost prototype tests of scaled wave energy converter in a real sea environment. The prototype was a point absorber with a cylindrical buoy, a mechanical power take-off system with a counterweight, moored to the seabed as a tension leg platform (TLP) with three equal tendons. In these extensive experiments, numerous device characteristics were measured and analysed. The present paper focuses on the dynamic forces in the mooring lines, and some unexpected and rare data obtained. It is well known that TLP tendons are prone to a brief loss of tension (the slacking) and that, after such events, high snapping forces of short duration can arise. Partly by intention, and partly due to underestimation of the dynamical forces, several such slacking-snapping incidents were recorded during the experiments. In some severe storms, the snapping forces were up to six times higher than the tendon pretension. The paper presents several recordings of dynamic forces and platform motion during these critical events. It analysis them, and gives a typical scenario under which they occur. It gives also some theoretical explanations, and numerical predictions of dynamical tendon forces, with their comparison to the experimental results.     

基于编队海上列车概念的多艇编队航行水动力分析

以某型特种滑行艇为基础计算模型单元，基于编队海上列车概念，提出4种典型编队形式并进行计算流体动力学（Computational Fluid Dynamics，CFD）计算，探索多艇编队航行的减阻可行性，并开展多艇编队航行水动力分析，对指导海上多船编队航行具有一定的借鉴参考意义。     

船舶制造车间资源数据采集与场地状态信息采集

针对船舶制造车间存在的生产与管理的信息交互不及时、信息采集效率低、生产过程掌控不足等问题，通过条码、射频识别(Radio Frequency Identification, RFID)、超宽带(Ultra Wide Band, UWB)和自动化装置接口集成等技术，进行车间资源数据采集与场地状态信息采集，实现场地、设备、人员、工装等与管控系统间的互联互通，完成车间场地的物流优化和布局优化，为船舶制造智能车间信息感知奠定基础。     

我国船舶工业行业VOCs排放现状与污染控制路线分析

针对目前我国船舶工业行业挥发性有机物（Volatile Organic Compounds，VOCs）排放现状，对源头、工艺过程和末端治理各环节所采取的减排措施进行分析和梳理，从工艺设计到工艺全流程系统地提出降低涂装VOCs排放治理的路线，可为船舶工业行业全面开展VOCs污染防治工作提供技术基础。     

Optimal base motion to compensate for the influence of sea currents during riser re-entry

One of the difficult operations, which consists in moving the riser and placing its end relatively close to a desired position, is the re-entry operation. Complex dynamic behavior of risers under different sea conditions requires efficient modelling methods. The model used in this paper applies a modification of the segment method using joint coordinates, in which it is possible to analyze only one selected deformation while neglecting the others. This enables a very high computational efficiency of the method to be achieved. The models developed take into account the impact of the environment in which the risers work. The model is validated by comparison of the authors' own results with those presented by other researchers and the simulations are concerned both with statics and dynamics of spatial risers. The numerical effectiveness of the method presented enables it to be applied in the solution of dynamic optimization problems, one of which is presented by the example of the re-entry process. The process of moving the riser is useful in emergency situations (evacuation) when it is necessary to disconnect the riser from the wellhead and move it together with the platform. This optimization task is a 3D problem due to the sea currents acting at different angles on the riser in relation to the direction defined by beginning and final positions of the bottom end of the riser. The calculations are carried out for a hang-off riser, and the optimal motion of the base for different conditions of the sea is defined. The influence of the LMRP (Lower Marine Riser Package) on this movement is also examined.     

Stochastic wave spectra estimation (SWSE) based on response surface methodology considering uncertainty in transfer functions of a ship

In this paper, a new wave spectra estimation method is proposed in which the frequency domain wave estimation method (FDWE) is extended into a probabilistic analytical framework in order to estimate the encountered sea states involving uncertainty in transfer functions of a ship. The proposed method, named the Stochastic Wave Spectra Estimation (SWSE), makes use of an Hermite polynomial chaos expansion (PCE) to represent the uncertainty in the transfer functions and the response surfaces. The method involves a mathematical formulation where an extension of the deterministic FDWE concept to the space of random variables is made. The proposed method can accurately and easily estimate the encountered wave spectra based on ship response measurements accounting for uncertainty in the transfer functions. In this paper, numerical and experimental investigations of the proposed SWSE are made, where the uncertainties in the transfer functions of heave and pitch motions of a containership are taken into account. The validity of the SWSE is demonstrated by comparison to results of uncertainty analyses through the Monte-Carlo simulations (MCS).     

南通市沿海滩涂资源围垦开发现状与成效*

通过对南通沿海滩涂资源潜力的分析，结合南通沿海地区当前滩涂围垦现状，总结该区域滩涂围垦所带来的一系列成效。研究表明：南通沿海地区加强滩涂围垦有利于拓展渔业发展空间，提升渔业发展水平；加快陆海产业合理布局，促进产业转型升级；完善港口基础设施，促进临港产业发展；促进港产城融合发展，壮大滨海旅游业。