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Effect of Si_3N_4 on Resistance of Magnesia Based Castable

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China's Refractories 2007年第3期16卷 18-21页

作者： zhang jingyu QIN Wei XU Deting SUN Jialin HONG Yanruo School of Materials Science and Engineering. University of Science ＆ Technology Beijing Beijing 100083 Henan Gengsheng Refi＇actories Co. Ltd. Gongyi 451271

The magnesia based curable specimens with different Si3N4 contents were casted using sintered magnesite （w（MgO）=95%） as starting material, SiO2 micro-powder as binder, 0.3%, 4% and 5% β-Si3N4 powder replacing the equal addition of magnesia powder respectively. The slag resistance test was carried out at 1550℃ for 3h using Baosteel tundish slag and static crucible method. The result indicates that： introducing Si3N4 could obviously improve the slag resistance of MgO based castable, which increased with increasing Si3N4. Dense SiO2 sintered layer formed on the surface of magnesia based castable because of the oxidation of Si3N4 addition, which can prevent the further slag penetration. In the deep inner of castable, the partial-pressure of oxygen was very low, so Si3N4 can exist stably. Meanwhile in reducing atmosphere, Si3N4 was hard to be sintered, which resulted in the loose interior structure of MgO based castable.

关键词： Magnesia based castable Silicon nitride Slag resistance property

Comparative Study on LADRC and NLADRC of VGT-EGR System in Diesel Engine

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Comparative Study on LADRC and NLADRC of VGT-EGR System in D...

第三十九届中国控制会议

作者： Pingyue zhang jingyu zhang Xian Du Hao Xia Yuhu Wu Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology School of Control Science and Engineering Dalian University of Technology

In this paper, linear active disturbance rejection controller and nonlinear active disturbance rejection controller are designed for variable geometry turbine（VGT） and exhaust gas recirculation（EGR） system in diesel engine. The double-input double-output（DIDO） VGT-EGR system is designed as two single-input single-output（SISO） systems, in which the crosscoupling and unmodelled dynamics are considered as disturbances and decoupled through estimation and compensation. Through simulation, it is indicated that nonlinear active disturbance rejection controller has better tracking performance, disturbance resistance performance and robustness.

关键词： Linear active disturbance rejection controller nonlinear active disturbance rejection controller variable geometry turbine exhaust gas recirculation diesel engine

FeCrAl合金材料织构对其宏观力学本构关系的影响研究

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固体力学学报 2020年第6期41卷 545-554页

作者：张靖宇丁淑蓉复旦大学航空航天系力学与工程仿真研究所上海200433

FeCrAl合金具有优良的高温抗氧化性和耐辐照性能,是事故容错核燃料包壳的重要候选材料.其在加工过程和热处理过程中易形成α纤维织构(//RD)和γ纤维织构(//ND),会影响材料的宏观力学性能与深加工成形能力.该研究针对具有不同织构的多晶F... 详细信息

FeCrAl合金具有优良的高温抗氧化性和耐辐照性能,是事故容错核燃料包壳的重要候选材料.其在加工过程和热处理过程中易形成α纤维织构(//RD)和γ纤维织构(//ND),会影响材料的宏观力学性能与深加工成形能力.该研究针对具有不同织构的多晶FeCrAl合金,建立了代表性体元模型,使用晶体塑性有限元方法,在ABAQUS/Explicit中模拟材料单轴加载下的宏观应力应变曲线,分析不同织构对FeCrAl合金宏观力学本构关系的影响.计算结果表明,对于具有α织构、γ织构和晶粒无择优取向的材料,在轧向上的应力应变曲线差异较小.γ织构会引起材料强烈的各向异性,在轧面法向上的屈服强度远高于轧向和横向上的屈服强度,这是因为晶粒的方向平行于加载方向,滑移系难以启动.提高γ纤维织构的比例,将增大轧面法向上的屈服强度.该研究可以为优化FeCrAl合金材料织构、加工条件和材料力学性能提供参考.

关键词：事故容错燃料 FeCrAl合金晶体塑性有限元宏观力学性质织构

《全民目击》:“和谐”文本的类型改造与叙事迷局

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当代电影 2014年第5期 130-133页

作者：张净雨中国传媒大学艺术学部戏剧影视学院

由非行编剧、导演的影片《全民目击》是一部融合了商业、艺术、官方多方诉求的"和谐文本"。本文从类型与叙事策略两大方面入手,分析论述了《全民目击》将多层面且矛盾性的主旨缝合在一起的创作方法 :首先是基于语境,选对类型,并根据传... 详细信息

由非行编剧、导演的影片《全民目击》是一部融合了商业、艺术、官方多方诉求的"和谐文本"。本文从类型与叙事策略两大方面入手,分析论述了《全民目击》将多层面且矛盾性的主旨缝合在一起的创作方法 :首先是基于语境,选对类型,并根据传播需求对其进行加工改造;其次是通过多视角非线性的叙事策略实现中国化"谜题叙事"改造,铺设悬念与制造突转,从而在戏剧化的叙事结构中通过建构不同视角,达到多方意识形态的认同及整合。

关键词：《全民目击》类型模式谜题叙事犯罪片法庭剧多视角叙事非线性叙事

A Control-oriented Model Identification for Air Path System of Diesel Engines

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A Control-oriented Model Identification for Air Path System ...

第三十九届中国控制会议

作者： Zhijian Wang Xinda Yang Jingfei zhang jingyu zhang Yuhu Wu R & D Center Weichai Power Co.Ltd School of Control Science and Engineering Dalian University of Technology

In this paper, an air path model of diesel engine is developed, parameterized, and validated. In order to promote the design of model-based control techniques, such as model-predictive control for modern diesel engine, it is important to establish a control-oriented model that can describe the gas mass flow dynamics including the dynamics of the pressure of intake and exhaust manifold and the turbocharger. Through the analysis of the structure of air path system, a simplied model with three states is obtained. Using the real-time data from diesel engine test bench, we estimate several submodels parameters by adopting the least square optimization. Calculating the relative error between estimated parameters and corresponding measured one verify the accuracy of the model.

关键词： Diesel engine Control-oriented model Identification Air path system

Deep Sequencing of Brachypodium Small RNAs at the Global Genome Level Identifies MicroRNAs involved in Cold Stress Response

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Deep Sequencing of Brachypodium Small RNAs at the Global Gen...

第十二届全国植物基因组学大会

作者： jingyu zhang,Yunyuan Xu,Qing Huan,Kang Chong~* 中科院植物所

High-throughput sequencing and whole-genome-wide data mining led to the identification of 27 conserved miRNAs,as well as 129 predicted miRNAs in *** expression of 3 conserved miRNAs and 25 predicted miRNAs showed significant changes in response to cold *** these miRNAs, some were cold-induced and some were cold-suppressed,but all the conserved miRNAs were up-regulated under cold stress *** results suggest that Brachypodium miRNAs are composed of a set of

关键词：

When hard-to-maneuver aircraft causes high workload for controllers:an extension of relational complexity network framework

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When hard-to-maneuver aircraft causes high workload for cont...

第十八届全国心理学学术会议

作者： zhang jingyu E,Xiaotian Du,Feng Wu,Changxu Institute of Psychology Chinese Academy of Sciences University of Chinese Academy of Sciences The State University of New York at Buffalo

For air traffic controllers, the presence of hard-to-maneuver aircraft(HTMA, e.g. military aircraft, aircraft in emergency, etc.) puts constraints on their selection of intervention strategies. Intuitively, such constraint can significantly increase controllers’ workload. However, previous studies produced rather mixed findings concerning its effect. In the current study, we extended relational complexity network(RCN) framework to analyze the influence of HTMA on controllers’ workload. In this new model, we propose that controllers’ workload is dependent on the steps to untie the RCN which is jointly determined by network structure, the position of HTMA and some basic cognitive rules. In an experiment involving twenty-two professional air traffic controllers, we found controllers’ reported workload and task completion time can be accurately quantified by this new model. By offering a tenable solution to predict the interaction between air traffic pattern and tactical constraints, this study provides further evidence concerning the validity and usefulness of the RCN framework.

关键词：

小时代的“轻”电影——薇拉莉·邓泽里对法国新浪潮的继承与突破

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当代电影 2014年第8期 106-110页

作者：张净雨中国传媒大学艺术学部戏剧影视艺术学院讲师100024

本文以薇拉莉·邓泽里的电影作品与新浪潮之间的对话关系为基础,通过对比分析其电影与法国电影新浪潮影片的异同,分别从主题、题材、制片模式、视听语言几方面来总结概括薇拉莉·邓泽里"作者电影"的风格特征。并指出在私媒介流行的消费... 详细信息

本文以薇拉莉·邓泽里的电影作品与新浪潮之间的对话关系为基础,通过对比分析其电影与法国电影新浪潮影片的异同,分别从主题、题材、制片模式、视听语言几方面来总结概括薇拉莉·邓泽里"作者电影"的风格特征。并指出在私媒介流行的消费社会,这种举重若轻的主题、私人生活的题材、时尚风格的话语是对新浪潮遗产的继承与突破。

关键词：薇拉莉·邓泽里新浪潮自传电影镜像话语

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不同环境下水泥土动弹性模量的试验研究

振动与冲击 2016年第18期35卷 181-185页

作者：陈四利张精禹魏星沈阳工业大学建筑与土木工程学院沈阳110870

为了研究动力荷载以及地下腐蚀性介质环境对水泥土力学特性的影响,通过水泥土的动三轴压缩试验,获取了不同环境下水泥土的动弹性模量参数,分析了不同环境对水泥土动弹性模量影响的关系曲线。试验结果表明,随着硫酸钠腐蚀溶液浓度的增大... 详细信息

为了研究动力荷载以及地下腐蚀性介质环境对水泥土力学特性的影响,通过水泥土的动三轴压缩试验,获取了不同环境下水泥土的动弹性模量参数,分析了不同环境对水泥土动弹性模量影响的关系曲线。试验结果表明,随着硫酸钠腐蚀溶液浓度的增大,水泥土的动弹性模量逐步增大,当浓度≈0.03 mol/L时,水泥土的动弹性模量开始逐步降低;随着腐蚀时间的增加,当硫酸钠溶液浓度较小(0.03 mol/L)时,水泥土的动弹性模量逐步降低;当溶液浓度较小(0.03 mol/L)时,硫酸钠溶液和氯化钠溶液对水泥土均产生腐蚀破坏效应,且硫酸钠溶液腐蚀效应大于氯化钠溶液腐蚀效应;水泥掺入比越大,其动弹性模量越大;围压越大,水泥土的动弹性模量越大。

关键词：水泥土动三轴压缩试验动弹性模量腐蚀环境水泥掺入比围压