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焊接壳形艏门的变形计算及控制
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作者 刘金武 《造船技术》 1992年第2期42-44,共3页
本文介绍某厂在登陆艇艏门制造时采用的新工艺。采用夹具夹持焊接,比用刚性点固法固定焊接更有利于观察、检验焊接变形量,比自由状态焊接变形量小。边焊、边检、边矫正,保证一次焊接合格,避免水火矫正。
关键词 船舶 焊接工艺 变形 控制 船门
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Research on low-frequency mechanical characteristics of the MR dampers in ship isolators
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作者 姚熊亮 田正东 +1 位作者 沈志华 郭绍静 《Journal of Marine Science and Application》 2008年第4期243-247,共5页
A new isolator composed of a steel rope spring and a magneto-rheological(MR) damper was designed and a study on low-frequency mechanical characteristics of MR dampers in isolators was carried out.It used the character... A new isolator composed of a steel rope spring and a magneto-rheological(MR) damper was designed and a study on low-frequency mechanical characteristics of MR dampers in isolators was carried out.It used the characteristics of the MR damper,such as fast response,controllable damping,small energy consumption,wide dynamic scope,and great adaptation.The relationships between MR damping forces and influencing factors were analyzed based on experimental data.The results show that damping force is not only related to structural dimensions,but also closely related to controllable current and vibration frequency.Finally,the empirical formula for damping forces was corrected,and the relationship between correction coefficients and factors analyzed. 展开更多
关键词 ship isolator magnetorheological fluid magnetorheological fluid damper LOW-FREQUENCY mechanical characteristics
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Interactions between Cryptosula and Watersipora (Bryozoa: Cheilostomata) on a ship's hull in Qingdao Harbour (South Yellow Sea) after five and a half years of immersion
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作者 刘会莲 Kamil ZáGOR?EK +2 位作者 王世伟 马士德 Paul D.TAYLOR 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第5期1179-1188,共10页
The distributions of two ubiquitous fouling cheilostome bryozoans,Cryptosula pallasiana(Moll,1803)and W atersipora sp.,on a ship moored for almost six years in Qingdao Bay show diff erences with respect to illuminatio... The distributions of two ubiquitous fouling cheilostome bryozoans,Cryptosula pallasiana(Moll,1803)and W atersipora sp.,on a ship moored for almost six years in Qingdao Bay show diff erences with respect to illumination,C ryptosula being dominant on the side of the ship which was exposed to the sun and Watersipora dominating on the other side which was in shadow for most of the time.Competitive interactions for substrate space were nearly always won by Watersipora,which succeeded in overgrowing the edges of C ryptosula colonies regardless of the side of the ship.Reasons for the superiority of W atersipora in spatial competition with Cryptosula could include faster growth rate and the stronger feeding currents created by the larger lophophores of Watersipora. 展开更多
关键词 ECOLOGY Cryptosula Watersipora spatial competition Yellow Sea Qingdao
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数船船
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作者 韩静霆 李胤 《儿童音乐》 2012年第12期10-10,共1页
关键词 海蓝 亲亲 船门 海鸥 大圆
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侵略者的下场——日野少将毙命记
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作者 徐日禄 《党史纵横》 1993年第9期22-22,共1页
1938年9月26日夜晚,我地下联络员朴永山同志,将一份紧急情报送到东北抗日联军第七军军部并报告说:伪满洲国军政部要员日野武雄少将前来边境视察防务.他在40多个武装军警的保护下,今天己乘船来到小佳河集团部落巡视.他们在一两天之内就... 1938年9月26日夜晚,我地下联络员朴永山同志,将一份紧急情报送到东北抗日联军第七军军部并报告说:伪满洲国军政部要员日野武雄少将前来边境视察防务.他在40多个武装军警的保护下,今天己乘船来到小佳河集团部落巡视.他们在一两天之内就要返回饶河. 展开更多
关键词 姑任 班达 开一 比竹 船门 八比 二山 八州 凹地 上凸
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三原色棉花
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作者 郑妍 《少年月刊》 1999年第4期18-19,共2页
玲玲的老家在海南岛。爷爷在那里种的百亩三原色棉花已经盛开,她要去看一看。 星期天早晨天刚亮,玲玲就开着小飞船出发了。小飞船在空中急驰过黄河、长江和大海后,在爷爷家的小院门前平稳地降落了。玲玲打开船门跳下去一看。
关键词 天刚 船门 百亩 一朵朵 把花 给你 六朵 花机 织花 下角
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黄猄蚁小记
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作者 李元胜 《人与自然》 2015年第3期90-93,共4页
在雨林中穿行的时候,我的原则是管好自己的脚。我对道路边的草丛敬畏有加,有两个原因:一是避免踩到蛇,二是因为草丛中总是有黄猄蚁。关于蛇,真不是我危言耸听,行走在户外,和它们遭遇的次数太多了,而且其中还有些臭名昭著的毒蛇——曾经... 在雨林中穿行的时候,我的原则是管好自己的脚。我对道路边的草丛敬畏有加,有两个原因:一是避免踩到蛇,二是因为草丛中总是有黄猄蚁。关于蛇,真不是我危言耸听,行走在户外,和它们遭遇的次数太多了,而且其中还有些臭名昭著的毒蛇——曾经有一个晚上我就发现了三种毒蛇!当然,我拍它们时都保持安全距离,小心地拍了就撤。脚管住了,不要踩住它们,其实是很安全的。而黄猄蚁,则是令人头疼的小东西,不容易看见,总是在你全神贯注地寻找昆虫时,咬你一下,让你触电似的短暂一疼。 展开更多
关键词 黄猄蚁 地拍 虎甲 令人 叶甲 叶片边缘 船门 团团围住 就这样 均匀分布
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