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汪太琨 《舰载武器(含VCD光盘)》2001,(1):38-42
第二次世界大战以来,干扰和假目标弹药已成为水面战舰被动防御的主要手段,各主要海军国家都对此给予高度重视,本文主要介绍了西方各国假目标弹药的装备和研制情况,并对几种主要假目标系统的优缺点进行了讨论。 相似文献
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结合实践工作经验,分析航道疏浚工程中存在的主要问题,并以此为出发点,提出了航道疏浚工程过程中所采取的主要技术措施,主要目的在于为今后类似工程提供参考依据。 相似文献
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通过几个工程近一年来的施工经验,就计算机指挥调度系统的设计原则,工作原理,主要功能,主要技术参数,完善与推广应用等方面进行探讨。 相似文献
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根据自卸船货物自动装卸的要求,该船主要配有液压,空气振动器,水喷淋除尘及水清洗货舱等4个主要特种系统。本文分别对这些系统在设计,制造安装及调试使用三个阶段的主要关键技术作分析。 相似文献
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《船舶设计技术交流》2004,(4):36-36
据悉,今年上半年内地主要港口累计完成集装箱吞吐量2766万标箱,同比大幅增长27.3%,其中沿海主要港口完成2600万标箱,内河主要吞吐量排名的前十位港口中,上海港集装箱吞吐量突破650万吨标箱居第一位,深圳港紧随其后,交通部称,上半年各主要港口改革基本到位, 相似文献
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7月份,我国主要经济指标延续企稳向好的势头,并且该势头更趋明朗化。受国家宏观经济影响,7月份港口运输生产继续向好,主要生产指标稳步上升。 相似文献
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交通部水运司运输与安全处 《水运管理》2007,29(11):38-39
7,8月份,反映国民经济增长速度的两项主要经济指标全国城镇固定资产投资和工业企业增加值分别增长26.2%,27.3%和18%,17.5%。鉴于国民经济增长偏快并有过热发展的倾向,国家近期加强宏观调控力度,第3季度港口生产高位调整,各项主要生产指标完成良好,其主要特点归纳如下。 相似文献
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阐述先进WR-21型船用燃气轮机的主要技术参数,装船特性,经济的燃油耗油率,极高的可靠性,并对主要发达国家的燃气轮机进行比较,提出有待进一步改进的技术问题。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献