我国新能源汽车的发展及探讨

在环境污染和能源危机的双重压力下,新能源汽车的研发势在必行。它不仅有利于节能减排,也是应对国际金融危机、推动产业结构调整的重要措施。文章介绍了国内外新能源汽车的种类和发展现状,指出了亟待解决的问题和解决的措施,最后对新能源汽车的发展进行了展望。     

基于AQPSO算法的圆碟形水下滑翔机路径规划

为解决复杂海洋环境影响下圆碟形水下滑翔机的路径规划问题,采用多黏性Lamb涡叠加方法模拟洋流环境模型。以最小能量消耗为优化目标,结合B-spline方法生成光滑的曲线路径,采用自适应性基于量子行为的粒子群优化算法对圆碟形水下滑翔机的路径选择进行优化求解。将该算法与粒子群优化算法和基于量子行为的粒子群优化算法相对比,仿真结果验证了各算法在求解航行路径问题方面的有效性。此外,基于能耗最优原则分析各算法的适用性。     

Seasonal upwelling underneath the Tsushima Warm Current along the Japanese shelf slope

Seasonal upwelling variations are examined in the eastward coastal boundary branches of the Tsushima Warm Current (TWC). The climatological pattern and the fundamental hydrographic structure of the seasonal appearance of cold water are revealed by analyzing the temperature profile data around the Japanese shelf area. Seasonal maps of temperature at the intermediate layer around 200 m depth show the rise of the main pycnocline along the Japanese coast due to seasonal subsurface cooling from May to September. The cold water areas appear around the strong curvature in the continental shelf break. These areas are confined to the south of the TWC thermal front, i.e., to the coastal boundary region. The seasonal appearance of the localized cooling areas implies that the seasonal upwelling is induced by horizontal variations in shelf topography and the intensifying TWC from May to September.     

浅谈汽车检测技术发展及现状

未来我国的汽车检测领域应当朝向标准化、一体化、智能化与制度化方向发展,以可持续发展观为指导,在加速发展检测技术的同时实现对汽车检测技术的提高。文章针对我国当前检测技术的发展现状进行有效分析,并列举了几种对汽车部件检测的具体方法。     

筑路机械电器系统瞬间过电压保护

以筑路机械电器系统瞬间过电压的保护方式为研究对象，对瞬间过电压的状态进行分析，并借鉴国外典型保护性理论，推荐适合国情的实用性电路，以期对筑路机械电器系统过电压保护有参考价值。     

长江引航面临的问题及应对措施

本文从长江引航业近几年来高速发展的态势，分析了面临的问题，并提出解决问题的对策。     

工程建设监理之"现状与思考"

对工程建设监理的现状与思考进行探讨.     

Measurement of air–water CO2 transfer at four coastal sites using a chamber method

We measured the air–water CO₂ flux in four coastal regions (two coral reefs, one estuary, and one coastal brackish lake) using a chamber method, which has the highest spatial resolution of the methods available for measuring coastal air–water gas flux. Some of the measurements were considerably higher than expected from reported wind-dependent relationships. The average k₆₀₀ values for Shiraho Reef, Fukido Reef, Fukido River, and Lake Nakaumi were 1.5 ± 0.6, 3.2 ± 0.3, 0.69 ± 0.26, and 2.2 ± 0.9 (mean ± S.D.) times larger than the wind-dependent relationships. Results were compared with current-dependent relationships and vertical turbulence intensity (VTI). VTI is an index of water-surface stirring and is calculated from near-surface vertical velocity. Although some measurements from the reefs and river closely matched those expected from wind-dependent relationships, others were considerably higher. All data were correlated with VTI and were qualitatively explained by bottom macro-roughness enhancement. In Lake Nakaumi, results tended to differ from the wind-dependent relationships, and the difference between the measured and expected gas-transfer velocity was correlated with biological DO changes and/or the intensity of density stratification. We found these factors to have important effects on coastal gas flux. In addition, the chamber method was an effective tool for evaluating coastal gas flux.     

2005年汽车行业质量认证的现状及展望

引言汽车行业在认证活动的推广和发展中,质量认证已是全行业健康发展的重要基础和关键。随着市场经济全球化的形成,WTO在国内汽车行业的逐步进入和关税降低,汽车的进出口国际贸易蓬勃而迅速发展,质量认证不仅是汽车行业证明其组织管理水平、生产一致性控制能力及产品符合性的惟     

上海集装箱运输的现状与发展思考

在调查上海集装箱港航企业基础上,分类地统计了有关上海集装箱运输的数据。基于对上海集运产业的认识,结合本次调查所掌握的实际情况,对上海集运产业的发展提出了若干建议。在软件建设方面,尽快形成综合开发队伍,提高管理系统软件的开发层次和开发速度;加快电子单证、电子签名等的技术研究与立法工作;开发更为完善的生产作业指挥系统。在企业发展战略方面,着重从稳定货源、加强合作、着力开拓三方面进行了论述。