检索结果-南通市图书馆

Preparation and Metallurgical Analysis of High Activity Burnt Lime for Steelmaking

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第9期23卷 884-890页

作者： Hua-qiang HAO Yu-zhu ZHANG Su-ju HAO Chao-fa ZHANG Wu-feng JIANG Peng-hui CUI College of Metallurgy Northeastern University Department of Long Product Tangshan Iron and Steel CompanyHebei Iron and Steel Group College of Metallurgy & Energy Key Laboratory of the Ministry of Education for Modern Metallurgy TechnologyNorth China University of Science and Technology

Burnt lime is an important material in steelmaking and its activity degree is a key factor for liquid steel quality. The burnt lime was made by the calcination of limestone in a high pressure electric furnace. The burnt lime mineralogical phases and micro-morphologies were characterized by X-ray diffraction （XRD） and field emission scan- ning electron microscopy （FE-SEM）. The burnt lime activity degree was determined by acid-base titration, the burnt lime pore distribution was measured by mercury intrusion porosimetry （MIP）, and the thermal effect of a mixture of burnt lime and slag was measured by differential scanning calorimetry （DSC）. The results showed that the CaO grain size and pore size of burnt lime made under high pressure were larger than those of burnt lime made under atmos- pheric pressure. The CaO grain size and pore size increased and the laminate phenomenon also occurred clearly under high pressure. The activity degree of burnt lime made under high pressure was greater than that made under atmos- pheric pressure. The maximum activity degree was 437 mL for burnt lime made under a pressure of 0.4 MPa. For the same ratio of CaO to SiOz, the melting temperature, hemisphere temperature and fluidity temperature of slag decreased with increasing burnt lime activity degree. The higher the activity degree the burnt lime had, the better the slag forming occurred. It was advantageous for -2CaO · SiO2 and 3CaO · SiO2 forming at lower temperatures if the burnt lime activity degree was increased.

关键词： burnt lime high pressure calcination activity degree physical property slag performance

在线全文

学校读者我要写书评

暂无评论

基于自主行为智能体的月球车运动规划与控制

自动化学报 2006年第5期32卷 704-712页

作者：居鹤华崔平远刘红云北京工业大学电控学院北京100022

研究基于自主行为智能体的月球车运动规划与控制方法．在基于自主行为智能体的月球车系统结构基础上,首先设计了月球车运动规划与控制的一组基本行为,对其原理进行证明．通过行为状态机对行为进行选择,如果不能保障月球车安全性能,则由... 详细信息

研究基于自主行为智能体的月球车运动规划与控制方法．在基于自主行为智能体的月球车系统结构基础上,首先设计了月球车运动规划与控制的一组基本行为,对其原理进行证明．通过行为状态机对行为进行选择,如果不能保障月球车安全性能,则由运动规划智能体学习其行为参数,并由神经网络记忆．将月球车运动规划与控制分解为行为设计与学习两个过程,使月球车控制系统易于加入先验知识．同时,月球车运动规划能够满足其机动性与地形传送性约束,保证工程开发的结构化与可实现性．该方法不仅具有实时性,而且对未知环境具有较强的适应能力．仿真研究与实验证明了该方法的有效性．

关键词：月球漫游车自主行为智能体运动规划运动控制

EAFoC： Enterprise Architecture Framework Based on Commonality

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2006年第6期21卷 952-964页

作者： Jin-Woo Kim ju-Hum Kwo Young-Gab Kim Chee-Yang Song Hyun-Seok Kim Doo-Kwon Baik Department of Computer Science and Engineering Korea University 1 5-Ga Anam-Dong Sungbuk-Ku Seoul 136-701 Korea Department of Software Engineering Sang-Ju National University 386 Street Kajang-Dong Sang-Ju 742-711 Korea

The recent rapid development in information systems （ISs） has resulted in a critical need for integration and interoperability between heterogeneous ISs in various domains, using specific commonalities. However, stovepipe systems have been caused due to inconsistencies in planning IS architecture among stakeholders. So far, there has been no research on an enterprise architecture framework （EAF） that can satisfy with the coefficient factors of system architecture （SA） and enterprise architecture （EA）. This paper proposes a new EAF that can resolve the problems inherent in existing legacy EAFs and their features. EAFoC （Enterprise Architecture Framework based on Commonality） is based on commonality that can be satisfied as the coefficient factors in both SA and EA within a common information technology （IT） domain. Thus, it should be possible to integrate an established heterogeneous framework for each stakeholder＇s view. Consequently, the most important contribution of this paper is to establish the appropriate EAFoC for the development of consistent IS architecture, smooth communication among stakeholders, systematic integration management of diversified and complicated new IT technologies, interoperability among heterogeneous ISs, and reusability based on commonality with other platforms.

关键词： enterprise architecture (EA) enterprise architecture framework based on commonality (EAFoC) enterprise integration (El) requirements engineering process system architecture (SA)

rep(A_3,I,A)中的Gorenstein投射模

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

数学学报（中文版） 2015年第1期58卷 115-124页

作者：罗秀花居腾霞吴美云南通大学数学系南通226019

设A是域k上的有限维代数,(Q,I)是带关系的箭图,令Λ=AkkQ/I.Λ的模范畴Λ-Mod及有限生成模范畴Λ-mod分别与(Q,I)在A上的表示范畴Rep(Q,I,A)及有限维表示范畴rep(Q,I,A)等价.给出了范畴rep(A_3,I,A)中Gorenstein投射模的具体构造,其中... 详细信息

设A是域k上的有限维代数,(Q,I)是带关系的箭图,令Λ=AkkQ/I.Λ的模范畴Λ-Mod及有限生成模范畴Λ-mod分别与(Q,I)在A上的表示范畴Rep(Q,I,A)及有限维表示范畴rep(Q,I,A)等价.给出了范畴rep(A_3,I,A)中Gorenstein投射模的具体构造,其中(A_3,I)=3α→2β→1,I=.在此基础上,给出了代数A是自入射代数的一个充分必要条件.

关键词：箭图在代数上的表示 (强)Gorenstein投射模自入射代数

在线全文

学校读者我要写书评

暂无评论

重视和推动分子影像学研究

中华医学杂志 2007年第4期87卷 217-219页

作者：滕皋军居胜红东南大学附属中大医院放射科南京210009

随着分子生物学研究的飞速发展，尤其是基因组学、蛋白质组学及其相关技术的发展，研究中迫切需要某种手段来监测其研究对象在生物活体内的过程。于是，以细胞、基因或分子及其传递途径为成像对象的分子影像学（molecular imaging）应... 详细信息

随着分子生物学研究的飞速发展，尤其是基因组学、蛋白质组学及其相关技术的发展，研究中迫切需要某种手段来监测其研究对象在生物活体内的过程。于是，以细胞、基因或分子及其传递途径为成像对象的分子影像学（molecular imaging）应运而生。医学影像学历经百年，终于从以解剖结构为成像基础的传统医学影像学发展到了以细胞／分子结构和功能为成像基础的分子影像学时代，这代表了医学影像学的未来，将对现代和未来医学模式产生重要的影响。

关键词：分子影像学医学影像学分子生物学基因组学蛋白质组学传递途径分子结构解剖结构

基于数模计算的水电站调压室设置条件判别方法

在线全文

学校读者我要写书评

暂无评论

人民长江 2019年第11期50卷 211-216,232页

作者：张婧镁鞠小明四川大学水利水电学院四川成都610065 四川大学水力学与山区河流开发保护国家重点实验室四川成都610065

水电站调压室设计规范中,对是否需要设置调压室采用的判定依据是:引水系统的水流惯性时间常数值(T_w)是否小于2~4 s,再结合与机组惯性时间常数之比来研判。而在实际工作中,对于Tw介于2~4 s的水电站,设计人员难以判定是否需要设置调压室... 详细信息

水电站调压室设计规范中,对是否需要设置调压室采用的判定依据是:引水系统的水流惯性时间常数值(T_w)是否小于2~4 s,再结合与机组惯性时间常数之比来研判。而在实际工作中,对于Tw介于2~4 s的水电站,设计人员难以判定是否需要设置调压室。为此,以四川省拉拉山水电站为例进行了计算研究。该水电站引水隧洞长仅为2.3 km,且Tw介于2~4 s之间,采用了瞬变流计算方法进行调压室设置与否的定量论证分析,并给出了电站调节保证计算和引水系统小波动稳定性计算方程及实例计算曲线。结果表明:系统的小波动稳定性较好,调节保证计算结果符合设计规范。该水电站设置调压室的论证过程和方法可为同类电站的设计提供借鉴和参考。

关键词：调压室设置条件判别调保计算瞬变流计算水流惯性时间常数拉拉山水电站

在线全文

学校读者我要写书评

暂无评论

不同压实度和基质吸力的粉煤灰三轴试验研究

岩土力学 2019年第A01期40卷 224-230页

作者：王欢陈群王红鑫张文举四川大学水利水电学院水力学四川成都610065 四川大学山区河流开发保护国家重点实验室四川成都610065 商丘市城区河道管理所河南商丘476000 中国市政工程西南设计研究总院有限公司四川成都610081

粉煤灰的非饱和抗剪强度是准确分析非饱和状态灰坝的稳定性所必需的,但目前对其研究积累较少。通过控制不同压实度、不同基质吸力、不同净围压对粉煤灰进行一系列非饱和土三轴试验,探讨压实度和基质吸力对粉煤灰应力-应变关系曲线和强... 详细信息

粉煤灰的非饱和抗剪强度是准确分析非饱和状态灰坝的稳定性所必需的,但目前对其研究积累较少。通过控制不同压实度、不同基质吸力、不同净围压对粉煤灰进行一系列非饱和土三轴试验,探讨压实度和基质吸力对粉煤灰应力-应变关系曲线和强度参数的影响。研究结果表明,基质吸力较低时粉煤灰的应力-应变曲线没有峰值,呈硬化型;基质吸力逐渐增大时应力-应变曲线有明显的峰值,呈软化型;压实度越大,非饱和粉煤灰试样的应力-应变曲线的软化特征越明显,总黏聚力和内摩擦角均越大;非饱和粉煤灰的总黏聚力随着基质吸力的增大而逐渐增大,增大速率逐渐变缓,最后趋于稳定;不同基质吸力粉煤灰试样的内摩擦角变化不大,并且都近似等于饱和试样的内摩擦角;随着基质吸力的增大,吸力内摩擦角对粉煤灰试样的抗剪强度的贡献越来越小。研究得出的非饱和粉煤灰的抗剪强度特性对灰坝的设计和稳定性分析具有理论意义和工程实用价值。

关键词：粉煤灰抗剪强度压实度基质吸力

DOMAIN DECOMPOSITION WITH NON-MATCHING GRIDS FOR COUPLING OF FEM AND NATURAL BEM

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2005年第4期18卷 529-542页

作者： YANG ju'e HU Qiya YU Dehao LSEC Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China

In this paper, we introduce a domain decomposition method with non-matching grids for solving Dirichlet exterior boundary problems by coupling of finite element method （FEM） and natural boundary element method（BEM）. We first derive the optimal energy error estimate of the nonconforming approximation generated by this method. Then we apply a Dirichlet-Neumann（D-N） alternating algorithm to solve the coupled discrete system. It will be shown that such iterative method possesses the optimal convergence. The numerical experiments testify our theoretical results.

关键词： Domain decomposition non-matching grids natural boundary reduction multiplier space error estimate D-N alternating algorithm convergence.

Profile Distribution and Storage of Soil Organic Carbon in an Aquic BrownSoil as Affected by Land Use

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2005年第3期4卷 199-206页

作者： JIANGYong ZHANGYu-ge LIANGWen-ju WENDa-zhong InstituteofAppliedEcology ChineseAcademyofSciencesShenyang110016PR.China InstituteofAppliedEcology ChineseAcademyofSciencesShenyang110016PR.China／／CollegeofLandandEnvironmentShenyangAgriculturalUniversityShenyang110161P.R.China

Many attempts have been made to estimate the soil organic carbon (SOC) storage under different land uses, especiallyfrom the conversion of forest land or grassland into cultivated field, but limited reports were found on the estimation ofthis storage after cultivated field converted into woodland or grassland, especially in small scales. This study is aimed toinvestigate the dynamics of SOC concentration, its storage and carbon /nitrogen (C/N) ratio in an aquic brown soil at theShenyang Experimental Station of Ecology, Chinese Academy of Sciences under four land use patterns over 14 years. Thefour land use patterns were paddy field (PF), maize field (MF), fallow field (FF) and woodland (WL). In each pedon at 0-150cm depth, soil samples were collected from ten layers. The results showed that the profile distribution of SOC was differentunder different land uses, indicating the effect of land use on SOC. Soil organic carbon was significantly related with soiltotal N, and the correlation was slightly closer in nature ecosystems (with R2=0.990 and P<0.001 in both WL and FF, n=30)than in agroecosystems (with R2=0.976 and P<0.001 in PF, and R2=0.980 and P<0.001 in MF, n=30). The C/N ratio in theprofiles decreased generally with depth under the four land use patterns, and was comparatively higher in WL and lowerin PF. The C/N ratio of the FF was closer to that in the same soil depths of MF than to that of PF. Within 100 cm depth, theannual sequestration of SOC was 4.25, 2.87, and 4.48 t ha-1 more in WL than in PF, MF and FF, the annual SOC increasingrate being 6.15, 3.26, and 5.09 % higher, respectively. As a result, the SOC storage was significantly greater in WL than inany of the other three land use patterns, P=0.001, 0.008, and 0.008 as compared with PF, MF, and FF, respectively, whilethere was no significant difference among the other three land uses. It is suggested that woodland has the potential tomake a significant contribution to C storage and environmental quali

关键词： Aquic brown soil Carbon storage C/N ratio Land use Soil organic carbon