渔船型线优化及水动力性能研究

基于fluent数值模拟和模型试验相结合的方法,对某一渔船进行型线优化,通过CFD仿真技术进行多方案船型优选,开展船模试验以验证仿真结果,以优选出来的船型为基础进行艉部和球鼻艏的改型,并再次通过模型试验量化改型的效果。型线优化后明显改善了阻力、推进水动力性能,取得了较好的结果。     

用纵向函数法生成渔船线型的研究

本文以渔船为对象探讨船体数学线型设计纵向函数法的应用,研究一种适用于具有初始纵倾的线型的交互设计方法。它用多项式链表达横剖线,纵向函数基本协调配合。文中给出两个设计的横剖线图,供初步设计阶段使用是足够满意的。本文还对若干主要问题进行了讨论。     

水下捕捞机器人的研究现状与发展

本文介绍了国内外水下机器人研究现状和研究技术。基于现有水下机器人的技术水平和水下捕捞的具体环境,讨论了水下捕捞机器人机、电、流体、智能识别等关键技术,并对比了各项技术之间的优缺点。展望了未来水下捕捞机器人的发展趋势。     

Assessment of Quality of Service of Virtual Knowledge Communities

An assessment method for the quality of service (QoS) of virtual knowledge communities (VKC) is proposed based on fuzzy theory and analytic hierarchy process (AHP). The QoS is evaluated in terms of Website design, reliability, responsiveness, trust,personalization, and information quality. The cognitive QoS and the QoS evaluated by assessors are compared to analyze which QoS of the VKC should be improved urgently and which indicators keep leading positions, and to assist administrators of the VKC on measuring and understanding current status and implementation effect of the QoS.     

宁德某一级渔港水域布置

相较于普通货运码头及船舶,渔港水域布置方式、渔船船型有着其特殊性。针对渔港水域布置中存在的要点、难点及问题,总结水运、水产行业标准及地方标准,对水域设计条件要求进行研究。根据数模结果,采用多个水域布置方案研究、分析及比选的方法,得到水域平面布置与数模结果间的规律。根据方案对比经验,综合考虑并取舍波浪、潮流、泥沙回淤因素,确定最优水域布置方式。     

计及渔具影响的拖网渔船阻力性能预报研究

本文对某拖网渔船在考虑渔具作用下的船体阻力进行研究,以不同纵倾角设定渔具影响的五种工况,对船体阻力进行性能预报,对其阻力成分进行了比较分析,得出不同阻力在不同工况时的变化情况。同时结合船模水池阻力实验,通过对数值模拟和实验结果分析得出,渔具对拖网渔船阻力的影响规律,从而预报船体阻力性能。     

珠江口捕鱼旅游船舶安全管理初探

根据海上捕鱼旅游这一新的旅游方式,分析了其存在的不安全因素,提出了保证其安全的措施,有利于改善海上捕鱼旅游的安全。     

折角型玻璃钢渔船线型设计方法研究

在分析各种船型设计方法的基础上,提出了一种更适合折角型玻璃钢渔船线型变换的设计方法,扩展了传统的母型改造法。特点是在给定母型的型值、柱长Lpp、型宽B、设计吃水T以及设计船的主尺度和主要要素后,就能变换出满足要求的设计船,而不依赖于母型船的横剖面面积曲线,不用保证船舯剖面系数相同,且还能确保折角线的光顺性。通过几条实船的线型设计,证明了该方法的先进性和工程实用性。     

渔业船舶管理信息系统的设计与实现

讨论了渔业船舶管理信息系统设计与实现中的一些重要细节和关键问题.从构建数据库、配置服务器和代码实现三个方面,分别研究了表的构建、IIS设置、数据绑定控件的操作、以二进制流的方式存储图片等,并具体给出了设置方法和实现某些功能的VB代码.     

Why Conservation Needs Religion

Conservationists have been criticized for failing to protect nature in the face of mounting threats including overexploitation, species loss, habitat destruction, and climate change. Resource managers and scientists have yet to fully engage a major segment of the global population in their outreach efforts to protect the environment: religious communities. The world's religions have been recognized as a surprising driver of support for conservation of biological diversity, and numerous examples demonstrate religious and conservation groups working together to achieve conservation outcomes. However, many conservation organizations do not effectively engage religious groups. When conservation organizations do engage religious groups, efforts to do so are often ad hoc and such partnerships may wane over time. A more systematic approach is needed that directly engages religious communities, develops effective partnerships, supports and sustains dialogue aimed at finding common ground despite potentially divergent worldviews, and establishes supporting mechanisms to maintain the partnerships that are developed. Effective partnerships between religious and conservation groups represent significant untapped potential which can directly support conservation outcomes; such partnerships are likely to become increasingly important with dwindling support for conservation.