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我国的海神崇拜与航海历史一样悠久。在中华先民最初走向大海时,由于航海技术相对落后,航海知识相对贫乏,必然因畏惧而产生崇拜心理。这种心理以神的形象具象化,于是产生了最早的海上保护神——原始海神图腾。随着航海技术的发展,海上活动愈加丰富,人们对海神的崇拜逐渐从“单纯敬畏”向“有所要求”转化,这种功利性的需求趋向,也使海神的形象逐渐具体化、“凡人”化。 相似文献
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张廷麟 《舰载武器(含VCD光盘)》2007,(7):69-74
在欧洲各国中,英国皇家海军的两栖战兵力是最强的,这与英国注重全球兵力投送有很大关系。尽管近些年英国皇家海军的规模在压缩,主战舰艇不断减少,但两栖舰艇的数量和质量却都呈增长之势。随着“海洋”号直升机母舰、“海神之子”级船坞登陆舰和“湾”级辅助船坞登陆舰的陆续服役,英国海军的两栖战能力呈现出了一个全新面貌。在这些新型两栖舰艇中,“海神之子”级船坞登陆舰有着很重要的地位。[编者按] 相似文献
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浩瀚的海洋,一望无际。此起彼伏的巨涛在冲击着一切,吞没着一切。自古以来,人类从未在海神的挑战面前畏惧过,正是在征服海洋的搏击中涌现出了许多无畏的战士。 1876年.美国人阿列弗莱德· 相似文献
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崔英 《舰载武器(含VCD光盘)》2006,(9):65-75
海上巡逻机群是一支强大的海上作战力量.在信息优势主导战争的今天,其重要性显得尤其突出。近两年来,波音公司正在为英国海军加紧研发全新一代的P-8A“海神”多任务海上巡逻机,用以取代服役日久的P-3C“猎户座”海上巡逻机。由于“海神“的开发融入了全新的设计理念并被赋予了全新的作战使命,所以有专家认为,它的问世不仅标志着美国海军将完全摒弃对传统海上巡逻机的战略、战术和使用要求.而且将颠覆国际海上巡逻机市场某些已经成熟的规则,直接影响陆基海上飞机执行海上任务的传统体制。[编者按] 相似文献
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以市场为中心、以顾客为关注焦点的经营理念已经被企业、社会所广泛接受,文章就如何在经营过程中贯彻这个理念,谈了一些做法和看法,认为应该与顾客建立“诚信”为本的经营战略伙伴关系、提高顾客满意度、提供人性化的售后服务、以顾客满意度测评结果为依据,持续改进、提高产品质量和售后服务质量。 相似文献
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Sea surface temperature fields of the North Sea and Baltic Sea have been constructed for the year 2001 using a multiplatform Optimal Interpolation scheme. The analyzed fields are constructed every 12 h on a 10 km spatial grid. The product is based upon observations from the three NOAA satellites 12, 14 and 16 together with a large amount of in situ observations. Space dependent covariance functions are estimated from the satellite observations and account for spatial and temporal lags. Several independent methods have been used to assess the error on the sea surface temperature product. Compared against independent in situ observations, the mean RMS difference for the year 2001 is 0.78 °C. The spatial distribution of the errors reveals that the Baltic Sea in general show higher errors than the North Sea. The error statistics throughout the year show a temporal variation of the errors with maximum during summer and winter. Tests with a varying number of satellite observations show that the accuracy of the satellite observations is the most important parameter in terms of reducing the errors on the interpolated sea surface temperature product. 相似文献
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Assessment of sea surface temperature observational networks in the Baltic Sea and North Sea 总被引:4,自引:0,他引:4
The satellite and in situ Sea Surface Temperature (SST) observational networks in the Baltic Sea and North Sea are evaluated based on the quality of the gridded SST products generated from the networks. A multi-indicator approach is applied in the assessment. It includes evaluation of data quality, effective data coverage, field reconstruction error and model nowcast error. The results show that the best available full-coverage SST product is generated by assimilating the SST observations to obtain a yearly mean model bias of 0.07 °C and RMSE of 0.64 °C. The effective data coverage rate is 31% by using AVHRR (Advanced Very High Resolution Radiometer) data from NOAA (National Ocean and Atmosphere Administration) satellites 12, 14 and 16. The data redundancy increases rapidly with the number of infrared sensors. Using either NOAA satellite 12 or all 3 satellites makes a small difference with regard to derived effective coverage and the ocean model nowcast error. The influence of using the in situ SST observations in the SST field reconstruction is negligibly small. Instead, the major role of in situ SST observations is in calibrating the satellite observations. To study the relative importance of data quality and data coverage, an assessment is done for two satellite products: one product is based entirely on NOAA 12 data and has larger coverage but lower quality. The other product is a subset of the SAF products (derived from NOAA 14 and 16) and has lower coverage but higher quality. Based on current monitoring, modelling and assimilation technology, the results suggest that the data quality is an important factor in further improving the quality of the gridded SST products. Recommendations are made for possible further improvements of the existing SST observational networks. 相似文献
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