48 research outputs found
基于增量式自学习策略的多语言翻译模型
针对源语言到目标语言缺乏平行语料的情况,提出了一种基于增量式自学习策略的多语言翻译模型,即利用中介语双语语料训练源语言到目标语言的翻译模型.在Transformer架构下,相比于基于中介语和直接在伪平行语料上训练的普通双语翻译模型,使用该方法在第十四届全国机器翻译研讨会(CWMT 2018)多语言翻译评测数据集上的机器双语互译评估(BLEU)值提升了0.98个百分点.在此基础上,还对比了不同的预处理方法、训练策略以及多模型的平均和集成策略,其中多模型集成策略的BLEU值上可在多模型策略的基础上进一步提升0.53个百分点.国家科技支撑计划项目(2012BAH14F03);;国家自然科学基金(61573294);;教育部博士点基金(20130121110040);;国家语委委托项目(WT135-10);国家语委甲骨文专项(YWZ-J010
Improvement of Sensitivity of the Lonizing Method For Radon Determination by lntegrated Current
采用积分电流电离法测氡结果表明;当氡气剂量很低时,在给定时间内将十分微弱的电流积分,大大地提高了测定的灵敏度,可测得剂量为1bQ以下的氧气,与常用的fd-125氡钍分析仪的比较实验数据相对误差不超过5%.The experimental results of Rn determination by the ionizing method with integrated ciruit are presented.The sensitivity of Rn determination could be greatly improved by integration of weakly ionizing current at very low concentrations of Rn and within the given experimental period.Experimental results indicated that sensitivity would be 1 Bq dose of Rn.Relative error was less than 5% in comparison with that of the FD-125 Rn analyzor
The Ionizing Measurement of Radon Escaped From the Underground Water
将氧气引入电离室,测定其微电流,可以直接测定地下水逸出气氡的浓度,实现自动记录。为地下水氧测定提供新的途径。该文着重介绍应用电离法测氧的各组实验及数据。When Radon is introduced into the ionizing cell,the micro-current can be mea-sured,so the Radon concentration can be measured directly and recorded automatically,This is a newmethod For measuring the Radon escaped From the underground water.In this paper,we present someexperiments and results of the Radon s measurement by the way of ionization
Characteristics of subbottom sedimentary seguence in Bachimen Strait of Dongshan Island of Fujian
应用Klein 510型(美)海底剖面仪装置,把220VAC或24VDC电源能转化为3.5KHZ的超短波向海底发射,经过不同物性的地层所产生的不同穿透与反射效应,从而在返回的信息记录中获得不同的屏谱记录.应用这一原理所获的地层信息可供分析各地层的各种参数如深度、层厚、风化程度和组成物等,如遇到突然异常物如礁石、沉船、断裂带也可从屏谱中显示出来并准确地找到它的位置和尺度.本装置已在厦门湾、湄洲湾、东山湾等多处工程应用中经过实践检验,并获得成功.八尺门海峡的探研同样取得海底地层特征的良好结果.Research experiments have been conducted on the acoustic effects of different sedimentary layers of the estuary and bay areas with Klein-510 type subbotton profiler. Clear and continuing sediment layer boundaries have been recorded and compared with drilling cores to reveal the changes of sedimentaty environments. It is found that the weathering index of rock is control by the fault lineand this is an important instrument for all the sea bottom engineerings
水下爆炸时爆源与压力探头间距离的测定
(一)前言水下爆炸的各主要参量如冲击波压力、冲量、能流密度等都是距爆源距离的函数,即这些参数的值都是指某一特定距离下的值.如果用传感器去测定某点的爆压等参量,则必须同时确切地测出该点与爆源的距离,否则所测得
机器人减速器疲劳寿命测试装置开发与研究
针对机器人减速器疲劳寿命测试需求,在机器人减速器疲劳寿命测试方法的基础上研制了机器人减速器疲劳寿命测试装置,对测试装置关键件进行了分析,并进行了试验验证。相比已有连续回转工作模式的测试装置,此测试装置采用往复摆动的惯性负载构件加载,可以模拟机器人减速器实际使用的运动方式,能高效、准确地进行加速疲劳寿命试验,并且测试精度高、成本低
