汉语专书词汇研究工作流程的信息化及应用

汉语专书词汇研究是汉语词汇学的基础内容,目前主要依靠人工方式完成,研究效率低、数据可靠性差、成果难以共享,不能满足语言研究及信息化的发展需要.调研和分析了专书词汇的研究过程,建立了专书词汇研究的工作流模型,提出了基于扩展标记语言(XML)的CVML数据交换格式,完成了面向专书词汇研究的信息化系统的设计和实现,推进了汉语专书研究工作的信息化进程.应用实践表明该系统可以有效提高研究效率,保障数据的正确性,并增强研究成果的可共享性.     

Preparation of lithium-ion polymer battery using LiNi1/3Co1/3Mn1/3O2 as a cathode material and its electrochemical properties

In this work, LiNi_1/3Mn_1/3Co_1/3O₂ powders were synthesized from co-precipitated spherical metal hydroxide. In the voltage range of 2.8–4.2, 2.8–4.4, and 2.8–4.6 V, the discharge capacities of LiNi_1/3Mn_1/3Co_1/3O₂ electrode were 163, 177, and 193 mAh⋅g⁻¹, respectively. A gel polymer electrolyte (GPE) was also prepared using polyoxyalkylene glycol acrylate (POAGA) as a macromonomer. LiNi_1/3Mn_1/3Co_1/3O₂/GPE/graphite cells were prepared and their electrochemical properties were evaluated at various current densities and temperatures. The ionic conductivity of the GPE was more than 6.2 × 10⁻³ S⋅cm⁻¹ at room temperature. POAGA-based cells were showed good electrochemical performances such as rate capability, low-temperature performance, and cycleability.     

P_2O_5填充的PVDF复合聚合物导电膜的研制与性能研究

以聚偏氟乙烯为基质,加入适量的P2O5,制备了P2O5填充的PVDF复合聚合物质子导电膜,采用交流阻抗谱的方法研究了P2O5的质量分数不同的复合膜的导电性能及相对湿度对电导率的影响.结果表明,该电解质的室温电导率达到10-2 S·cm-1,相对湿度在20%～90%范围内,对电解质的导电性影响不大.     

Sintering and Electronic Conducting Properties of Lao.7Ca0.3CrO3 Perovskite Synthesized by a Glycine-nitrate Process

La0.7 Ca0.3 CrO3 powder consisting of superfine and uniform particles （ 100-200 nm ） were synthesized using a glycine-nitrate process （ GNP ）. The sintering and electronic conducting properties of La0.7 Ca0.3 CrO3 were invetigated in the sintering temperature range of 1 200-1 450 ℃. The desired morphology of the powder significantly improved its sinterability. La0.7 Ca0.3 CrO3 ceramics sintered at 1 250-1 450 ℃ show high relative densities above 95 % . The ceramics sintered at 1 250-1 400 ℃ have very similar electronic conduct- ing properties, providing electronic conductivities around 55 Ω^-1 cm^-1 at a measuring temperature of 800 ℃ . Further increasing the sintering temperature to 1450 ℃ led to an apparent degradation of electronic conducting properties. This research demonstrates the advantage of the GNP in producing La0.7 Ca0.3 CrO3 with respect to the enhanced sintering properties and superior electronic conducting properties.     

Y2O3与MgO复合掺杂ZrO2材料的电性能研究

利用交流复阻抗分析技术对Y2O3与 MgO复合掺杂ZrO2材料的电性能进行了研究.发现随着Y2O3掺入量的增加,参与跃迁的氧空位增多,并促进烧结体的密度提高,气孔率降低,使得晶粒边界的电阻减少,导致(ZrO2)1-x-y(YO1.5)x(MgO)y陶瓷电导率增大.烧结温度的提高也是增加 (ZrO2 )1-x-y(YO1.5)x(MgO)y陶瓷电导率的重要因素之一.     

Speciation of the Fe(II)–Fe(III)–H2SO4–H2O system at 25 and 50 °C

This work presents theoretical and experimental results on the speciation of the Fe(II)–Fe(III)–H₂SO₄–H₂O system in concentrated solutions (up to 2.2 m H₂SO₄ and 1.3 m Fe). The aim was to study the chemical equilibria of iron at 25 and 50 °C in synthetic aqueous sulphuric acid solutions that contain dissolved ferric and ferrous ion species. Raman spectroscopy, volumetric titration and conductivity measurements have been carried out in order to study the presence of specific ions and to characterize the ionic equilibrium. A thermochemical equilibrium model incorporating an extended Debye–Hückel relationship was used to calculate the activities of ionic species in solution. Model calculations were compared with experimental results. Model simulations indicate that anions, cations and neutral complexes coexisted in the studied system, where the dominant species were HSO₄⁻, H⁺, Fe²⁺ and FeH(SO₄)₂⁰. This indicated that these solutions showed a high buffer capacity due to the existence of bisulphate ions (HSO₄⁻), which presented the highest concentration. A decrease in the concentration of H⁺ and Fe³⁺ took place with increasing temperature due to the formation of complex species. Standard equilibrium constants for the formation of FeH(SO₄)₂⁰ were obtained in this work: log K_f⁰ = 8.1 ± 0.3 at 25 °C and 10.0 ± 0.3 at 50 °C.     

Transient Rainfall-Runoff Loadings to a Partial Exfiltration System: Implications for Urban Water Quantity and Quality

Modification of rainfall-runoff processes by urban infrastructure and anthropogenic activities impacts receiving waters and the surrounding terrestrial environment. Infiltration–exfiltration systems such as a partial exfiltration reactor (PER) when loaded by transient sheet flow have the potential to attenuate the impact of both the quantity and quality of urban runoff. These in situ systems are subject to highly variable water quality and quantity while functioning under variably saturated flow conditions. To improve the understanding of field-scale PER performance as a rainfall-runoff unit operation and process, a two-dimensional (2D) numerical model was used to simulate the effluent hydrograph and water content profiles under transient hydraulic loadings. Richard’s equation was applied in the 2D model using parameters estimated from laboratory experiments and hydrographs measured for an in situ PER. The temporal dynamics of the water content illustrated the ability of the PER to lower peak flow, redistribute volume, and attenuate temporal aspects of the inflow hydrograph. Results demonstrated the role of the PER to attenuate runoff water quantity, while also providing water quality improvements, as illustrated for suspended solids and dissolved Cu. Simulation of historical events for different surrounding soils illustrated the critical role of surrounding soil conditions on PER performance. While the PER demonstrated water quantity attenuation benefits for design storms (1, 2, 5?year return periods), results also illustrate how a given PER design for clayey soils conditions can be limiting for intense events. Evaporation was a dominant mechanism for the drying process in the PER upper layer; with a residual moisture content in the porous pavement layer achieved in less than 2?days in summer for Cincinnati, Ohio.     

NiFe2O4基金属陶瓷的电导率

制备了铝电解用NiFe2O4基金属陶瓷惰性阳极,研究了环境温度及材料成分对电导率的影响.实验结果表明NiFe2O4基金属陶瓷的电导率主要受温度、陶瓷基体电导率、金属成分及金属相在陶瓷相中分散度的影响;当温度从573 K升至1 233 K时,NiFe2O4陶瓷的电导率由0.099 S/cm提高到2.105 S/em;与NiFe2O4陶瓷相比,金属陶瓷的电导率有极大的提高,但二者随温度的变化趋势是一致的;1 233 K时,金属含量为5%Ni,5%Cu和4.25%Cu+0.75%Ni的NiFe2O4基金属陶瓷的电导率分别为20.576 S/cm,14.970 S/cm和18.797 S/cm,用作铝电解惰性阳极已能满足要求,但与当前铝电解碳素阳极材料相比还存在很大距离.     

还原铜粉之注射成形

平均粒度约10μm的微细还原铜粉因不规则粉末形态及残留有较高的氧含量，而不易以注射成形工艺来制备高性能产品。本研究发现，采用具较多量之主干高分子为基础的多元粘结剂能克服不规则粉末形态所导致之严重粉末间之磨擦，而将这种微细还原铜粉顺利的注射成形。烧结时，若能在烧结孔洞封闭之前将粉末中的残留氧化物有效的予以还原，如在低于900℃之温度下给予适当保温，则注射成形组件之烧结密度可高达95％理论密度。在此条件下，注射成形组件的导电率可达纯铜导电率的80％以上。