A Novel Beam Search to Improve Neural Machine Translation for English-Chinese

Neural Machine Translation (NMT) is an end-to-end learning approach for automated translation, overcoming the weaknesses of conventional phrase-based translation systems. Although NMT based systems have gained their popularity in commercial translation applications, there is still plenty of room for improvement. Being the most popular search algorithm in NMT, beam search is vital to the translation result. However, traditional beam search can produce duplicate or missing translation due to its target sequence selection strategy. Aiming to alleviate this problem, this paper proposed neural machine translation improvements based on a novel beam search evaluation function. And we use reinforcement learning to train a translation evaluation system to select better candidate words for generating translations. In the experiments, we conducted extensive experiments to evaluate our methods. CASIA corpus and the 1,000,000 pairs of bilingual corpora of NiuTrans are used in our experiments. The experiment results prove that the proposed methods can effectively improve the English to Chinese translation quality.     

有机保温板薄抹灰外墙外保温系统修复改造研究

结合有机保温板薄抹灰外墙外保温系统的特点,通过具体修复工程案例介绍,研究了注浆法和表层加固法在既有建筑修复改造工程中的应用。     

成分配比对稀土钨电极材料组织及力学性能影响

通过固液掺杂、等静压压制、中频烧结的方法，制备了不同的氧化镧、氧化钇、氧化锆三元掺杂成分比例的钨电极材料烧结棒材，探究了不同成分配比对样品显微组织、第二相粒子分布以及宏观力学性能的影响。结果表明，氧化镧、氧化钇、氧化锆三元复合添加能够有效改善第二相粒子在钨基体中的分布形态，降低第二相在晶界的过度富集，提高钨电极材料的综合力学性能。并且当添加成分镧、钇、锆质量比为3:1:1时，材料具有最好的综合力学性能，致密度可达96.04%，显微硬度可达549.37HV0.3，抗压强度可达3785MPa，原因是此配比下第二相粒子最为细小均匀，弥散程度最高，对基体晶粒的细化作用最好，该配比下钨基体平均晶粒尺寸达到10.3μm。     

Carbon nanotube reinforced pyrocarbon matrix composites with high coefficient of thermal expansion for self-adapting ultra-high-temperature ceramic coatings

The mismatch in the coefficients of thermal expansion (CTE) of the carbon fiber reinforced pyrocarbon (Cf/C) composites and their thermal barrier coatings (TBCs) has significantly restricted the service life of Cf/C composites in high-temperature environments. Owing to the high CTE of TBCs, it is vital to find a material with similar mechanical properties and higher CTE than Cf/C composites. In this work, carbon nanotube reinforced pyrocarbon (Ct/C) nanocomposites with high CTEs were prepared to self-adapt to the TBCs. Different CTEs (～4.0–6.5 × 10^?6/°C) were obtained by varying the carbon nanotube (CNT) content of the Ct/C composites. Owing to the decreased mismatch in the CTEs, no cracks were formed in the TBCs (SiC and HfB₂-SiC-HfC coatings) deposited on the Ct/C composites. After heat treatment at 2100 °C, several wide cracks were found in the TBCs on the Cf/C composite, whereas the TBCs on the Ct/C composites were intact without cracks. We found that the CTE-tunable Ct/C composites can self-adapt to different TBCs, protecting the composites from oxidation at high temperatures.     

立井井筒表土层注浆加固过程的控制方法及应用

在分析表土层注浆加固治理井壁破裂原理的基础上，阐述了注浆加固过程控制的必要性，提出了根据实测井壁附加应变的变化规律来控制注浆加固过程的方法.依据具体的工程条件，研究了注浆加固过程控制的监测系统、控制内容和实施方法.研究和实施的结果表明，注浆加固过程的有效控制，可使井壁的既有应变得到明显的缓释，可改善井壁的受力状态，保证注浆期间井壁的安全，确保矿井的安全生产.     

Study on destructions and reinforcement measures of mined constructions

Ground movement and deformation caused by underground mining would destroy the constructions located within subsidence area. Constructions would suffer different destructions with different location. The effect of ground deformation caused by underground mining to constructions was analyzed. Analyzed the destructive types of constructions in different ground movement and deformation. Taking a two-storey building for example, the walls were reinforced by computation before mining. To protect the construction the reinforcement measures to the construction before mining were studied.     

济南市基坑支护设计系统

介绍了济南市基坑设计系统及其构造，分析了基坑设计方法，讨论了软件的系统功能。采用面向对象的技术分析软件的构建过程，从基坑设计过程中提出系统的重要概念，给出了系统的概念图。同时，将系统的工作流程进行了分解，展示了系统活动，给出了活动图，最后归纳了系统的特点。     

基坑土层局部加固对减小支护结构位移的效果分析

本文就坑底土层局部加固对支护结构位移的影响效果和规律,结合工程实例,并从理论上进行了分析研究.理论和实例分析表明,坑底土层局部加固是减小支护结构位移的一种较为有效的方法.     

岩体锚固系统的串、并联模型及可靠度分析

针对目前以单一锚杆为主体研究的诸多问题，提出了岩体锚固系统的概念并分析了构成岩体锚固系统的4个单元要素之间的相互作用关系。为量化分析，建立了岩体锚固系统的串、并联模型，并根据该模型对锚固系统可靠度的计算进行了理论分析，给出了解析式。最后就模型对锚杆的理论研究、工程设计以及实践给出了有意义的结论。