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Channel Estimation and Throughput Evaluation for 5G Wireless Communication Systems in Various Scenarios on High Speed Railways

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China Communications 2018年第4期15卷 86-97页

作者： yanrong zhao xiyu wang gongpu wang ruisi he yulong zou zhuyan zhao school of computer and information technology beijing jiaotong universityBeijing 100044China the state key laboratory of rail traffic control and safety beijing jiaotong universityBeijing 100044China the key laboratory of broadband wireless communication and sensor network technology of ministry of education nanjing university of posts and telecommunicationsNanjing 210003China nokia bell labs beijing Beijing 100044China

The fifth generation （5G） wireless communication is currently a hot research topic and wireless communication systems on high speed railways （HSR） are important applications of 5G technologies. Existing stud- ies about 5G wireless systems on high speed railways （HSR） often utilize ideal channel parameters and are usually based on simple scenarios. In this paper, we evaluate the down- link throughput of 5G HSR communication systems on three typical scenarios including urban, cutting and viaduct with three different channel estimators. The channel parameters of each scenario are generated with tapped delay line （TDL） models through ray-tracing sim- ulations, which can be considered as a good match to practical situations. The channel estimators including least square （LS）, linear minimum mean square error （LMMSE）, and our proposed historical information based ba- sis expansion model （HiBEM）. We analyze the performance of the HiBEM estimator in terms of mean square error （MSE） and evaluate the system throughputs with different channel estimates over each scenario. Simulation results are then provided to corroborate our proposed studies. It is shown that our HiBEM estimator outperforms other estimators and that the sys-tem throughput can reach the highest point in the viaduct scenario.

关键词： 5G channel estimation HSR tapped delay line throughput pertbrmanceanalysis wireless communication.

Utilization of Bayer Red Mud Derived from Bauxite for Belite-Ferroaluminate Cement Production

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Journal of Renewable Materials 2020年第11期8卷 1531-1541页

作者： yanrong zhao Ping Chen Shifeng Wang Yaxiong Ji Yuanhao Wang Bolin Wu Rongjin Liu College of Material Science and Engineering Guilin University of TechnologyGuilin541004China Key Laboratory of New Processing Technology for Nonferrous Metal&Materials Ministry of EducationGuilin University of TechnologyGuilin541004China Guangxi Key Laboratory of New Energy and Building Energy Saving Guilin541004China Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials Guilin541004China Department of Physics College of ScienceTibet UniversityLhasa850000China

Bayer red mud(BRM)is a kind of industrial solid waste characterized by huge volume and high *** disposal generates serious environmental pollution and occupies a large number of *** utilization and recycling of BRM is currently a crucial issue and needs to be addressed as soon as *** chemical composition of BRM is similar to cement *** this study,the feasibility of preparing Belite-ferroaluminate clinker(BFAC)with different BRM was *** physical properties,mechanics performance,radioactivity levels and trace harmful metals leaching were ***,BEI and EDS were used to characterize the mineral formation,and SEM is used to reveal the solidified mechanism of trace harmful *** results show that the preparation of BFAC using a certain amount of BRM was *** formed phases in clinkers mainly included C_(4)A_(3)Š,C_(2)S and C_(4)*** flexural strength and compressive strength of BFAC at 3 days increased whereas 28 and 90 days decreased with the increase of BRM due to the formation of higher C_(4)AF and lower C_(2)*** formation of large amounts of Al_(2)O_(3)·3H_(2)O gel and Fe_(2)O_(3)·3H_(2)O gel in hydration products enhanced the adsorption capability to heavy metals and other *** trace harmful metal concentration in the leaching solution was much less than the upper *** radioactivity level of leaching solution was close to natural radioactive *** is safe as raw material of BFAC.

关键词： Bayer red mud belite-ferroaluminate clinker leaching of harmful metal radioactivity levels phosphogypsum

On-site tests to estimate aquifer permeability of drainage area of south caisson anchorage construction of Taizhou Bridge

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Engineering Sciences 2011年第2期9卷 20-25页

作者： Feng zhaoxiang zhao yanrong Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department （JPCD） Taizhou Jiangsu 225321 China School of Earth Sciences and Engineering Hohai University Nanjing 210098 China

During the construction of the south caisson anchorage of Taizhou Bridge, the drainage area is located in the lower reaches of the Yangtze River and the permeability of stratums there is considerable. In order to maintain progress and guarantee safety during the sinking of the caisson, water should be drained in the initial period. Subsequently, detailed information about the aquifer permeability is required to make sure that the drainage will proceed successfully, which consequently necessitates the on-site estimation of the aquifer permeability in the drainage area. Therefore, the traditional pumping test and slug test are implemented respectively on site. The comparison of computational results of these two tests indicates that they are consistent overall. Notwithstanding, as slug test can be conducted with portable facilities in a short time and the manipulation is easy and few people need to be involved, the advantages of slug test is conspicuous compared with the traditional pumping test. It could be speculated that slug test will gain a prevalent application in the measurement of aquifer permeability in the future.

关键词： Taizhou Bridge south-anchor caisson pumping test slug test

Research on subsidence method aided by water injection and its engineering application for the north anchor of Taizhou Bridge

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Engineering Sciences 2011年第2期9卷 33-38页

作者： Ruan Jing Zhou Zhifang zhao yanrong School of Earth Sciences and Engineering Hohai University Nanjing 210098China Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department （JPCD） Taizhou Jiangsu 225321China

The north anchorage caisson of Taizhou Bridge encountered some difficulties during the sinking process for the large sidewall frictional resistances. To solve this problem, a new concept and method called subsidence method aided by water injection is proposed. Numeral analysis is adopted to simulate the effects of this method for the north anchor of Taizhou Bridge, which confirmed the feasibility and validity. Finally, the method is applied to the north anchor caisson during the caisson sinking procedure and helps the caisson sink and embed to the designed position smoothly.

关键词： anchorage sink Taizhou Bridge subsidence method aided by water injection

A Study of the system control model of caisson dewatering of the north anchorage of Taizhou Bridge

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Engineering Sciences 2011年第2期9卷 26-32页

作者： zhao yanrong Zhou Zhifang Ruan Jing School of Earth Sciences and Engineering Hohai University Nanjing 210098China

A caisson foundation is applied to the north anchorage of Taizhou Yangtze River Highway Bridge of which the initial caisson sinking requires dewatering. Since the caisson foundation is quite close to nearby buildings, a system control model is established with source (sink) distribution and intensity being the object function, minimum requirements of settlement and deformation of surroundings caused by dewatering and dynamic water levels during different working procedures being constraints, and the design parameter of pumping wells being the variable,so as to lower the jeopardizing of surrounding buildings, which provides a new method for active control over settlement during dewatering. Such a method of dewatering based on system control model should be of significance for similar projects involving dewatering.

关键词： Taizhou Bridge caisson of north anchorage construction dewatering system control model

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振荡试验确定倾斜承压含水层水文地质参数

水科学进展 2015年第2期26卷 233-242页

作者：戴云峰周志芳赵燕容吴蓉河海大学地球科学与工程学院江苏南京210098 河海大学文天学院安徽马鞍山243000

为评价振荡试验在获取倾斜承压含水层水文地质参数过程中含水层倾角对计算结果的影响,基于Kipp模型推导了考虑承压含水层倾角的振荡试验解析解模型。倾斜承压含水层量纲一贮水系数和量纲一导水系数不变条件下,测试井-含水层系统的量纲... 详细信息

为评价振荡试验在获取倾斜承压含水层水文地质参数过程中含水层倾角对计算结果的影响,基于Kipp模型推导了考虑承压含水层倾角的振荡试验解析解模型。倾斜承压含水层量纲一贮水系数和量纲一导水系数不变条件下,测试井-含水层系统的量纲一阻尼系数随着倾角的增加而增加。修正模型计算的量纲一阻尼系数与Kipp模型计算的量纲一阻尼系数偏差10%以上时,必须考虑倾角的影响并且承压含水层倾角对水头响应曲线造成影响临界角度约为34°。修正模型和Kipp模型对现场振荡试验水头响应曲线分析结果的差异表明,忽略含水层倾角会对倾斜承压含水层导水系数和贮水系数的计算结果产生较大误差。

关键词：振荡试验倾斜承压含水层倾角导水系数贮水系数

佛教幸福感的心理学解读:基于中西比较的视角

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心理学探新 2014年第5期34卷 392-397页

作者：赵艳蓉彭彦琴苏州大学心理系苏州215123

幸福感是文化定位的,因此幸福感的研究必须本土化。佛教是影响中国人最重要的三种文化传统之一,正确理解佛教独特的对于幸福感的理解也能够进一步推动幸福感研究的本土化进程。笔者通过对佛教教义的梳理,重点阐述了佛教对幸福的认识是"... 详细信息

幸福感是文化定位的,因此幸福感的研究必须本土化。佛教是影响中国人最重要的三种文化传统之一,正确理解佛教独特的对于幸福感的理解也能够进一步推动幸福感研究的本土化进程。笔者通过对佛教教义的梳理,重点阐述了佛教对幸福的认识是"苦乐圆融"。佛教"苦乐圆融观"主要从"苦受"和"乐受"两方面入手,其核心是"苦受",关键在"圆融"。最后,通过与西方幸福感研究的比较,加深对佛教"苦乐圆融观"的理解。佛教幸福感的研究作为一个新思路,不但丰富了幸福感的研究,也为今后进一步的研究提供了一定的依据。

关键词：幸福感佛教幸福感苦乐圆融中西比较

利用硬脂酸钙改善孔结构以降低碱矿渣水泥石吸水速率

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材料导报 2021年第23期35卷 23241-23245页

作者：李青杨长辉陈平杨凯明阳赵艳荣桂林理工大学土木与建筑工程学院广西建筑新能源与节能重点实验室桂林541004 重庆大学材料科学与工程学院重庆400045 利兹大学土木工程学院利兹LS29JT

碱矿渣水泥石吸水速率通常高出普通硅酸盐水泥石3~5倍,对其耐久性有严重负面影响。传统方法(如填充密实和调整配合比等)难以有效降低碱矿渣水泥石吸水速率,本工作利用硬脂酸钙(CaSt)改善碱矿渣水泥石孔结构,同时在孔隙壁上引入硬脂酸钙... 详细信息

碱矿渣水泥石吸水速率通常高出普通硅酸盐水泥石3~5倍,对其耐久性有严重负面影响。传统方法(如填充密实和调整配合比等)难以有效降低碱矿渣水泥石吸水速率,本工作利用硬脂酸钙(CaSt)改善碱矿渣水泥石孔结构,同时在孔隙壁上引入硬脂酸钙憎水膜,以降低碱矿渣水泥石吸水速率。通过MIP、SEM等测试手段,研究了硬脂酸钙对碱矿渣水泥石孔隙率、孔径分布、孔隙曲折度和孔形貌的改善作用,以揭示CaSt对吸水速率的改善机理。结果表明:CaSt能够在无害孔范围(100 nm内)优化AAS孔径分布,减少水化产物缺陷,增大孔隙连曲折度,并在水化产物基体壁形成CaSt憎水膜,有效降低碱矿渣水泥石吸水速率约80%左右,且低于普通硅酸盐水泥。在碱矿渣水泥体系中硬脂酸钙的特点在于兼具疏水性和孔结构改性作用,同时对力学性能影响较小,具有优越的推广潜力和研究价值。

关键词：硬脂酸钙碱矿渣水泥吸水速率孔结构

浅析互联网科技背景下金融创新的监管对策——以P2P监管为例

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江苏商论 2018年第11期 27-29页

作者：赵延荣江苏经贸职业技术学院江苏南京211168

中国历史上是一个金融业发达的国家,也是一个金融创新大国,古代中国发明过纸币、汇票等,随着互联网技术和通信技术的发展,出现了很多新的科技和技术,必然也会影响到资本最前沿的金融业,产生很多新的金融业经营模式和领域,比如P2P等。目... 详细信息

中国历史上是一个金融业发达的国家,也是一个金融创新大国,古代中国发明过纸币、汇票等,随着互联网技术和通信技术的发展,出现了很多新的科技和技术,必然也会影响到资本最前沿的金融业,产生很多新的金融业经营模式和领域,比如P2P等。目前在互联网金融的部分领域,中国已经成为全球的领导者,由此也产生了一些新的监管领域和变革,需要我们认真面对和研究,以降低金融风险的概率。

关键词：互联网金融创新对策