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Improving Parallel Corpus Quality for Chinese-Vietnamese Statistical Machine Translation

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Journal of Beijing Institute of Technology 2018年第1期27卷 127-136页

作者： Huu-anh Tran Yuhang guo Ping Jian shumin Shi Heyan Huang Department of Computer Science and Technology Beijing Institute of Technology Beijing Engineering Research Center of High Volume Language Information Processing and Cloud Computing Application Beijing Institute of Technology

The performance of a machine translation system heavily depends on the quantity and quality of the bilingual language resource. However,getting a parallel corpus,which has a large scale and is of high quality,is a very difficult task especially for low resource languages such as Chinese-Vietnamese. Fortunately,multilingual user generated contents（ UGC）,such as bilingual movie subtitles,provide us access to automatic construction of the parallel corpus. Although the amount of UGC parallel corpora can be considerable,the original corpus is not suitable for statistical machine translation（ SMT） systems. The corpus may contain translation errors,sentence mismatching,free translations,etc. To improve the quality of the bilingual corpus for SMT systems,three filtering methods are proposed： sentence length difference,the semantic of sentence pairs,and machine learning. Experiments are conducted on the Chinese to Vietnamese translation *** results demonstrate that all the three methods effectively improve the corpus quality,and the machine translation performance（ BLEU score） can be improved by 1. 32.

关键词： parallel corpus filtering low resource languages bilingual movie subtitles machine translation Chinese-Vietnamese translation

Effect of ternary transition metal sulfide FeNi_(2)S_(4)on hydrogen storage performance of MgH_(2)

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Journal of Magnesium and Alloys 2023年第8期11卷 2927-2938页

作者： Yaokun Fu Lu Zhang Yuan Li Sanyang guo Han Yu Wenfeng Wang Kailiang Ren Wei Zhang shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

Hydrogen storage is a key link in hydrogen economy,where solid-state hydrogen storage is considered as the most promising approach because it can meet the requirement of high density and ***,magnesium-based materials(MgH_(2))are currently deemed as an attractive candidate due to the potentially high hydrogen storage density(7.6 wt%),however,the stable thermodynamics and slow kinetics limit the practical *** this study,we design a ternary transition metal sulfide FeNi_(2)S_(4)with a hollow balloon structure as a catalyst of MgH_(2)to address the above issues by constructing a MgH_(2)/Mg_(2)NiH_(4)-MgS/Fe ***,the dehydrogenation/hydrogenation of MgH_(2)has been significantly improved due to the synergistic catalysis of active species of Mg_(2)Ni/Mg_(2)NiH_(4),MgS and Fe originated from the MgH_(2)-FeNi_(2)S_(4)*** hydrogen absorption capacity of the MgH_(2)-FeNi_(2)S_(4)composite reaches to 4.02 wt%at 373 K for 1 h,a sharp contrast to the milled-MgH_(2)(0.67 wt%).In terms of dehydrogenation process,the initial dehydrogenation temperature of the composite is 80 K lower than that of the milled-MgH_(2),and the dehydrogenation activation energy decreases by 95.7 kJ·mol-1 compared with the milled-MgH_(2)(161.2 kJ·mol^(-1)).This method provides a new strategy for improving the dehydrogenation/hydrogenation performance of the MgH_(2)material.

关键词： Hydrogen storage materials Magnesium hydride FeNi_(2)S_(4) Hydrogen storage kinetics Catalysts

Catalytic effect of MOF-derived transition metal catalyst FeCoS@C on hydrogen storage of magnesium

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Journal of Materials Science & Technology 2023年第7期138卷 59-69页

作者： Yaokun Fu Lu Zhang Yuan Li Sanyang guo Zhichao Yu Wenfeng Wang Kailiang Ren Qiuming Peng shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH_(2),therefore,in this paper,we synthesize a carbon-supported transition metal compound,FeCoS@C derivative from ZIF-67,by utilizing the in situ formed C dispersive multiphase Mg_(2)Co,α-Fe,Co_(3)Fe_(7),and MgS to implement catalysis to MgH_(2).Noteworthily,MgH_(2)-FeCoS@C rapidly ab-sorbs 6.78 wt%H_(2)within 60 s at 573 K and can also absorb 4.56 wt%H_(2)in 900 s at 473 ***,the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH_(2)from 620 to 550 *** dehydrogenation activation energy of MgH_(2)decreases from 160.7 to 91.9 kJ mol^(-1).Studies show that the Mg_(2)Co,α-Fe,and Co_(3)Fe_(7)act as“hydrogen channels”to accelerate hydrogen transfer due to the presence of transition metals,and MgS with excellent catalytic effect formed from MgH_(2)-FeCoS@C provides a strong and stable catalytic ***,the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system,but also provides more active sites for the *** study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH_(2).

关键词： Hydrogen storage material Magnesium hydride Heterogeneous catalyst Synergistic catalytic MOF materials

The electrochemical characteristics of AB_(4)-type rare earth-Mg-Ni-based superlattice structure hydrogen storage alloys for nickel metal hydride battery

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Journal of Magnesium and Alloys 2021年第6期9卷 2039-2048页

作者： Wenfeng Wang Xiaoxue Liu Lu Zhang Shuang Zhang Wei guo Yumeng Zhao Hongming zhang Yuan Li shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004PR China School of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004PR China

Rare earth-Mg-Ni-based alloys with superlattice structures are new generation negative electrode materials for the nickel metal hydride *** them,the novel AB_(4)-type superlattice structure alloy is supposed to have superior cycling stability and rate *** its preparation is hindered by the crucial requirement of temperature and the special composition which is close to the other superlattice ***,we prepare rare earth-Mg-Ni-based alloy and study the phase transformation of alloys to make clear the formation of AB_(4)-type *** is found Pr_(5)Co_(19)-type phase is converted from Ce_(5)Co_(19)-type phase and shows good stability at higher temperature compared to the Ce_(5)Co_(19)-type phase in the range of 930-970℃.Afterwards,with further 5℃increasing,AB_(4)-type superlattice structure forms at a temperature of 975℃by consuming Pr_(5)Co_(19)-type *** contrast with A_(5)B_(19)-type alloy,AB_(4)-type alloy has superior rate capability owing to the dominant advantages of charge transfer and hydrogen ***,AB_(4)-type alloy shows long lifespan whose capacity retention rates are 89.2%at the 100;cycle and 82.8%at the 200;cycle,***_(4)-type alloy delivers 1.53 wt.%hydrogen storage capacity at room temperature and exhibits higher plateau pressure than Pr_(5)Co_(19)-type *** work provides novel AB_(4)-type alloy with preferable electrochemical performance as negative electrode material to inspire the development of nickel metal hydride batteries.

关键词： Nickel metal hydride batteries Hydrogen storage alloys AB_(4)-type superlattice structure Electrochemical performance Kinetics properties

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基于跨专业融合的电网企业结转项目监测分析

电力与能源 2018年第2期39卷 289-291页

作者：刘当武郑高峰秦丹丹孙伟邵珺伟郭淑敏国网安徽省电力有限公司合肥230061 北京国网信通埃森哲信息技术有限公司北京100032

为了进一步加强结转项目预算执行进度的管控,查清找准影响执行进度的症结,国网安徽供电公司运监中心在发展、财务等部门配合下,依托ERP等业务信息系统,开展了公司结转项目预算执行情况监测分析工作,可根据业务需求调整监测周期、监测范... 详细信息

为了进一步加强结转项目预算执行进度的管控,查清找准影响执行进度的症结,国网安徽供电公司运监中心在发展、财务等部门配合下,依托ERP等业务信息系统,开展了公司结转项目预算执行情况监测分析工作,可根据业务需求调整监测周期、监测范围及业务规则。与业务系统分析模块相比,结转项目预算执行情况监测的灵活度更高、易用性强,具备一定的可拓展性。

关键词：结转管理预算分析

High-performance supercapacitors based on Ni_(2)P@CNT nanocomposites prepared using an ultrafast microwave approach

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 1021-1032页

作者： Yunrui Tian Haishun Du Shatila Sarwar Wenjie Dong Yayun Zheng shumin Wang Qingping guo Jujie Luo Xinyu Zhang College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Chemical Engineering Auburn UniversityAuburnAL 36849USA

We present a one-step route for the preparation of nickel phosphide/carbon nanotube(Ni_(2)P@CNT)nanocomposites for supercapacitor applications using a facile,ultrafast(90 s)microwave-based ***2P nanoparticles could grow uniformly on the surface of CNTs under the optimized reaction conditions,namely,a feeding ratio of 30:50:25 for CNT,Ni(NO_(3))_(2)-6H_(2)O,and red phosphorus and a microwave power of 1000 W for 90 *** study demonstrated that the single-step microwave synthesis process for creating metal phosphide nanoparticles was faster and simpler than all the other existing *** results showed that the specific capacitance of the optimal Ni2P@CNT-nanocomposite electrode displayed a high specific capacitance of 854 F•g^(-1) at 1 A•g^(-1) and a superior capacitance retention of 84% after 5000 cycles at 10 Ag^(-1).Finally,an asymmetric supercapacitor was assembled using the nanocomposite with activated carbon as one electrode(Ni_(2)P@CNT//AC),which showed a remarkable energy density of 33.5 W•h•kg^(-1) and a power density of 387.5 W·kg^(-1).This work will pave the way for the microwave synthesis of other transition metal phosphide materials for use in energy storage systems.

关键词： Ni_(2)P CNT supercapacitors nanocomposites microwave

二氧化锰的晶型控制及其对罗丹明B的降解研究

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化工新型材料 2024年第7期52卷 228-233页

作者：王淑敏高永康郭亚春高已星彭雪罗聪张天浩辽宁大学轻型产业学院沈阳110036 辽宁大学化学院沈阳110036

以高锰酸钾、四水氯化锰和少量浓盐酸为原料,利用水热法实现了MnO_(2)由α晶型向γ晶型再向β晶型的转变,采用X射线衍射(XRD)、X射线光电子能谱(XPS)和扫描电镜(SEM)等表征方法分析了MnO_(2)的晶型转化机理。利用高级氧化法以制备的MnO_... 详细信息

以高锰酸钾、四水氯化锰和少量浓盐酸为原料,利用水热法实现了MnO_(2)由α晶型向γ晶型再向β晶型的转变,采用X射线衍射(XRD)、X射线光电子能谱(XPS)和扫描电镜(SEM)等表征方法分析了MnO_(2)的晶型转化机理。利用高级氧化法以制备的MnO_(2)为催化剂对罗丹明B(RhB)进行了催化降解研究,探寻了催化效果最好的MnO_(2)晶型并推理出RhB的降解路径。结果表明:随着水热反应时间的延长,α-MnO_(2)逐渐向具有较小隧道尺寸的γ-MnO_(2)、β-MnO_(2)转变;3种晶型的MnO_(2)活化PMS对RhB均具有显著的降解效果,降解效率为α-MnO_(2)>γ-MnO_(2)>β-MnO_(2);紫外-可见吸收光谱分析说明MnO_(2)活化PMS降解RhB的路径为RhB先经过逐步脱乙基化转变成罗丹明、再生成其他有机小分子、CO_(2)和H2O。

关键词：二氧化锰晶型转化高级氧化法过硫酸氢钾降解路径

产蛋间隔期母鸽卵黄前体及其受体基因的表达分析

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畜牧与兽医 2024年第10期56卷 8-13页

作者：毛昕妍郭振玉邓子优吴薛蓓路淑敏陈静苗冬枝王莹扬州大学动物科学与技术学院江苏扬州225009

旨在探究产蛋间隔期鸽卵黄沉积相关基因的表达规律。选取12月龄白羽王鸽48对,分别在产蛋间隔(LI)第1天(LI1)、第3天(LI3)、第5天(LI5)和第7天(LI7)4个时期采集母鸽肝脏、卵巢、F1卵泡颗粒层和F1卵泡膜层样本,利用实时荧光定量PCR(RT-qP... 详细信息

旨在探究产蛋间隔期鸽卵黄沉积相关基因的表达规律。选取12月龄白羽王鸽48对,分别在产蛋间隔(LI)第1天(LI1)、第3天(LI3)、第5天(LI5)和第7天(LI7)4个时期采集母鸽肝脏、卵巢、F1卵泡颗粒层和F1卵泡膜层样本,利用实时荧光定量PCR(RT-qPCR)检测载脂蛋白B(APOB)、载脂蛋白极低密度脂蛋白Ⅱ(APO-VLDLⅡ)、卵黄蛋白原(VTG)2和极低密度脂蛋白受体(VLDLR)4种基因的表达规律。结果:肝脏中APOB的表达水平呈下降趋势,在LI7期达到最低,与LI1和LI3期差异显著(P<0.05);APO-VLDLⅡ在LI1期表达水平最高,呈先下降后上升再下降趋势,在LI3和LI7期达到最低,与LI1和LI5期差异极显著(P<0.01);VTG2的表达水平呈上升趋势,在LI7期达到最高,与LI1、LI3和LI5期差异极显著(P<0.01)。卵巢中VLDLR的表达水平呈先下降后上升再下降趋势,在LI3时达到最高,与LI1、LI5和LI7期差异极显著(P<0.01);颗粒细胞层中VLDLR表达水平呈先下降后上升趋势,在LI3期达到最低,与LI5和LI7期差异极显著(P<0.01);膜细胞层中VLDLR的表达水平呈先上升后下降趋势,在LI5期达到最高,与LI3期差异显著(P<0.05)。综上,产蛋间隔前期APOB和APO-VLDLⅡ表达水平较高,启动载脂蛋白合成和运输,后期卵黄沉积减缓,APOB和APO-VLDLⅡ表达水平下降,同时雌激素诱导VTG2表达水平上升;产蛋间隔前期卵巢VLDLR表达水平较高,介导吸收卵黄前体物质,后期颗粒细胞层和膜细胞层VLDLR表达水平较高,介导卵黄前体进入卵泡最终形成卵黄。

关键词：鸽卵黄沉积 APOB APO-VLDLⅡ VTG2 VLDLR

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二维面孔识别中族群信息与情绪信息的关系及其影响因素

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心理研究 2024年第3期17卷 201-208页

作者：崔占玲王淑敏郭津杜慧博申寻兵河北师范大学教育学院石家庄050024 江西中医药大学人文学院南昌330004

选取80名藏族学生,采用学习-再认范式,考察二维信息面孔识别中族群信息与情绪信息间的加工关系,以及社会接触程度对这种加工关系的影响。结果显示:(1)对于低社会接触者而言,族群信息与情绪信息加工彼此独立;族群信息加工不受情绪信息影... 详细信息

选取80名藏族学生,采用学习-再认范式,考察二维信息面孔识别中族群信息与情绪信息间的加工关系,以及社会接触程度对这种加工关系的影响。结果显示:(1)对于低社会接触者而言,族群信息与情绪信息加工彼此独立;族群信息加工不受情绪信息影响,存在异族效应;(2)对于高社会接触程度者而言,族群信息加工受情绪信息影响,异族效应出现反转。可见,面孔识别中二维信息的加工关系并非固定不变,考察面孔识别应同时考虑信息的维度和社会接触程度。

关键词：面孔识别情绪信息族群信息社会接触程度藏族学生

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