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Can floor-area-ratio incentive promote low impact development in a highly urbanized area？ A case study in Changzhou City, China

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Frontiers of Environmental Science & Engineering 2018年第2期12卷 79-87页

作者： Ming Cheng Huapeng Qin Kangmao He hongliang xu Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen 518055 China

As an environmental friendly measure Jbr surface runoff reduction, low impact development （LID） has been applied successfully in urban areas. However, due to high price of land and additional expense for LID construction in highly urbanized areas, the developers of real estate would not like to proceed LID exploitation. Floor area ratio （FAR） refers to ＂the ratio ofa building＇s total floor area to the size of the piece of land upon which it is built.＇＂ Increasing FAR indicates that the developers can construct higher buildings and earn more money. By means of awarding FAR, the developers may be willing to practice LID construction. In this study, a new residential district is selected as a case study to analyze the trade- offbetween the runoffreduction goal achieving by LID practices and the incentive of awarding FAR to promote LID construction. The System for Urban Stormwater Treatment and Analysis IntegratioN （SUSTAIN） model is applied to simulate the runoff reduction under various LID designs and then derive the Pareto-optimal solutions to achieve urban runoff reduction goals based on cost efficiency. The results indicates that the maximum surface runoff reduction is 20.5%. Under the extremity scenarios, the government has options to award FAR of 0.028, 0.038 and 0.047 and the net benefits developers gain are 0 CNY, one million CNY and two million CNY, respectively. The results provide a LID construction guideline related to awarding FAR, which supports incentive policy making for promoting LID practices in the highly urbanized areas.

关键词： Low impact development Runoff reductionIncentiveFloor area ratio SUSTAIN(System for Urban StormwaterTreatment and Analysis IntegratioN)

Polymer-derived SiBCN ceramic pressure sensor with excellent sensing performance

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Journal of Advanced Ceramics 2020年第3期9卷 374-379页

作者： Gang SHAO Junpeng JIANG Mingjie JIANG Jie SU Wen LIU Hailong WANG hongliang xu Hongxia LU Rui ZHANG School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Provincial Key Laboratory of Aviation Materials and Application Technology Zhengzhou University of AeronauticsZhengzhou 450046China

Pressure measurement with excellent stability and long time durability is highly desired,especially at high temperature and harsh environments.A polymer-derived silicoboron carbonitride(SiBCN)ceramic pressure sensor with excellent stability,accuracy,and repeatability is designed based on the giant piezoresistivity of SiBCN *** SiBCN ceramic sensor was packaged in a stainless steel case and tested using half Wheatstone bridge with the uniaxial pressure up to 10 *** SiBCN ceramic showed a remarkable piezoresistive effect with the gauge factor(K)as high as *** output voltage of packed SiBCN ceramic sensor changes monotonically and smoothly versus external *** as received SiBCN pressure sensor possesses features of short response time,excellent repeatability,stability,sensitivity,and *** the excellent high temperature thermo-mechanical properties of polymer-derived SiBCN ceramics(e.g.,high temperature stability,oxidation/corrosion resistance)into account,SiBCN ceramic sensor has significant potential for pressure measurement at high temperature and harsh environments.

关键词： polymer-derived ceramics(PDCs) silicoboron carbonitride(SiBCN)ceramic pressure sensor,piezoresistivity high termperature and harsh environment sensor

Development and application of the new BPM system data processing program at Hefei light source

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Nuclear Science and Techniques 2012年第5期23卷 261-266页

作者： MA Tianji YANG Yongliang SUN Baogen ZOU Junying LU Ping ZHOU Zeran xu hongliang NSRL School of Nuclear Science and Technology University of Science and Technology of China Hefei 230029 China

A data processing program has been applied for the new beam position monitor (BPM) system of the storage ring at Hefei Light Source (HLS). The new BPM system in the upgrade project will be equipped with Libera Brilliance BPM processors to replace the old Bergoz MX-BPM processors. The embedded Linux system on Libera has completed some important work, including instrument status check,data acquisition, position calculation, EPICS IOC data release,and so on. A new EPICS record type has been developed to recalculate the beam position with log-ratio method. The property of the new position data was analyzed in the time and frequency domain. The results show that the rms value of beam position measurement resolution can be up to submicron. Preliminary studies have been carried out on the measurement of the tune and the beam lifetime with this new BPM system.

关键词：数据处理程序 PM系统合肥光源嵌入式Linux系统 EPICS 应用开发位置数据

Sintering behavior of alumina whisker reinforced zirconia ceramics in hot oscillatory pressing

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Journal of Advanced Ceramics 2022年第6期11卷 893-900页

作者： Hongtian HE Rui ZHAO Hongyi TIAN Gang SHAO Hailong WANG Bingbing FAN Hongxia LU hongliang xu Rui ZHANG Li-nan AN School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Alumina whisker reinforced zirconia ceramic composite was prepared by both hot oscillatory pressing(HOP)and conventional hot pressing(HP).The results show that compared with HP,HOP can significantly increase the final density and densification rate of the *** of densification kinetics reveals that the predominant densification mechanism transits from grain boundary sliding in the beginning to the diffusion in the later *** main effect of the oscillating pressure is to increase the densification rate in the process of grain boundary *** current study suggests that HOP is a promising technique for densifying whisker reinforced ceramics.

关键词： hot oscillatory pressing(HOP) densification behavior grain boundary sliding whisker reinforced ceramic composite

Oscillatory pressure-assisted sinter forging for preparation of high-performance SiC whisker reinforced Al_(2)O_(3) composites

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Journal of Advanced Ceramics 2023年第2期12卷 321-328页

作者： Hongtian HE Gang SHAO Rui ZHAO Hongyi TIAN Hailong WANG Bingbing FAN Hongxia LU hongliang xu Rui ZHANG Li-nan AN School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

In this work,a novel process,oscillatory pressure-assisted sinter forging(OPSF),for the preparation of high-performance ceramic composites was *** with the samples made by conventional sinter forging(SF)and hot oscillatory pressing(HOP),the SiC whisker reinforced Al_(2)O_(3) composites(SiCw–Al_(2)O_(3))prepared by OPSF at the same temperature exhibited a higher density and significantly improved the mechanical *** improvements in densification and performance are attributed to simultaneous enhanced shear deformation at both macro-and micro-scales,resulting from the combination of die-free configuration and oscillatory pressure of *** the strength of grain boundary is greatly increased when the temperature reaches 1600℃ of OPSF,due to that the grain-boundary sliding became pronounced at higher *** current results shed light on a powerful technique for preparing ceramic composites,which is likely applicable to other systems.

关键词： sintering oscillatory pressure-assisted sinter forging(OPSF) densification mechanical property ceramic composites

Development of photon beam position feedback system based on two PBPMs at HLS

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Nuclear Science and Techniques 2013年第2期24卷 12-16页

作者： GU Liming SUN Baogen xuAN Ke YANG Yongliang LU Ping ZHOU Zeran CHENG Chaocai xu hongliang School of Nuclear Science and Technology & National Synchrotron Radiation Laboratory University of Science and Technology of China

In this paper,in order to stabilize the position and angle of the light source point,a new photon beam position feedback system based on the Photon Beam Position Monitors was developed on Hefei Light Source,and used to correct the position drift and angle variation of the light source at the same *** introducing the feedback principle,the transfer function matrix is calibrated,indicating that the new system is workable and effective.

关键词：位置反馈系统光子束基础 HLS 传递函数矩阵合肥光源反馈原理点光源

Enhancing electromagnetic wave absorption with core‐shell structured SiO_(2)@MXene@MoS_(2) nanospheres

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Carbon Energy 2024年第8期6卷 90-104页

作者： xuewen Jiang Qian Wang Limeng Song Hongxia Lu hongliang xu Gang Shao Hailong Wang Rui Zhang Changan Wang Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhouHenanChina Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhouHenanChina School of Materials Science and Engineering Tsinghua UniversityBeijingChina

Material composition and structural design are important factors influencing the electromagnetic wave(EMW)absorption performance of *** alleviate the impedance mismatch attributed to the high dielectric constant of Ti_(3)C_(2)T_(x)MXene,we have successfully synthesized core‐shell structured SiO_(2)@MXene@MoS_(2)*** architecture,comprising SiO_(2) as the core,MXene as the intermediate layer,and MoS_(2) as the outer shell,is achieved through an electrostatic self‐assembly method combined with a hydrothermal *** complex core‐shell structure not only provides a variety of loss mechanisms that effectively dissipate electromagnetic energy but also prevents self‐aggregation of MXene and MoS_(2) ***,the synergistic combination of SiO_(2) and MoS_(2) with highly conductive MXene enables the suitable dielectric constant of the composites,ensuring optimal impedance ***,the core‐shell structured SiO_(2)@MXene@MoS_(2) nanospheres exhibit excellent EMW absorption performance,featuring a remarkable minimum reflection loss(RL_(min))of−52.11 dB(2.4 mm).It is noteworthy that these nanospheres achieve an ultra‐wide effective absorption bandwidth(EAB)of 6.72 *** work provides a novel approach for designing and synthesizing high‐performance EMW absorbers characterized by“wide bandwidth and strong reflection loss.”

关键词： core‐shell structure electromagnetic wave absorption multiloss mechanism SiO_(2)@MXene@MoS_(2)

(Ca,Sr,Ba)ZrO_(3):A promising entropy-stabilized ceramic for titanium alloys smelting

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Journal of Materials Science & Technology 2021年第6期65卷 82-88页

作者： Shuaihang Qiu Mingliang Li Gang Shao Hailong Wang Jinpeng Zhu Wen Liu Bingbing Fan hongliang xu Hongxia Lu Yanchun Zhou Rui Zhang School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China Zhengzhou University of Aeronautics Zhengzhou 450046China

A novel entropy-stabilized(ES)(Ca,Sr,Ba)ZrO_(3) ceramic has been designed and synthesized by pressureless sintering of CaZr03,SrZr03 and BaZr03 powders mixtures at 1450℃,1500℃and 1550℃for 3 h.X-ray diffraction,scanning electron microscopy and transmission electron microscopy analyses collectively indicate that a single solid solution is formed with a homogeneous distribution of metal elements after sintering at 1550℃.The relative density and hardness of the ES(Ca,Sr,Ba)ZrO_(3) ceramic sintered at 1550℃are 97.79%and 10.840.33 GPa,re s *** ES(Ca,Sr,Ba)ZrO_(3) exhibits lower thermal conductivity from 373 K to 1073 K than their constituting zirconates,CaZrO_(3),SrZrO_(3) and BaZrO_(3).Most importantly,the ES(Ca,Sr,Ba)ZrO_(3) ceramic possesses good corrosion resistance to TiNi alloy melt and no distinct reaction layer exists between TiNi alloy and ES(Ca,Sr,Ba)ZrO_(3) ceramic in the contact *** combination of these properties indicates that ES(Ca,Sr,Ba)ZrO_(3) ceramic is promising for use as a novel crucible material for the melting of titanium alloys.

关键词： Entropy-stabilized ceramics (Ca Sr Ba)ZrO_(3) Corrosion resistance Pressureless sintering Thermal conductivity

Microwave induced in-situ formation of SiC nano wires on SiCNO ceramic aerogels with excellent electromagnetic wave absorption performance

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Journal of Advanced Ceramics 2021年第5期10卷 1140-1151页

作者： Keke YUAN Daoyang HAN Junfang LIANG Wanyu ZHAO Mingliang LI Biao ZHAO Wen LIU Hongxia LU Hailong WANG hongliang xu Gang SHAO Rui ZHANG School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China The 27th Research Institute of China Electronic Technology Group Corporation Zhengzhou 450047China Henan Key L aboratory of Aeronautical Material and Application Technology School of Materials Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China School of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China

Electromagnetic absorption(EMA)materials with light weight and harsh environmental robustness are highly desired and crucially important in the stealth of high-speed ***,meeting these two requirements is always a great challenge,which excluded the most attractive lightweight candidates,such as carbon-based *** this study,SiC_(nw)-reinfbrced SiCNO(SiC_(nw)/SiCNO)composite aerogels were fabricated through the in-situ growth of SiC_(nw) in polymer-derived SiCNO ceramic aerogels by using catalyst-assisted microwave heating at ultra-low temperature and in short *** phase composition,microstructure,and EMA property of the SiC_(nw)/SiCNO composite aerogels were systematically *** results indicated that the morphology and phase composition of SiC_(nw)/SiCNO composite aerogels can be regulated easily by varying the microwave treatment *** composite aerogels show excellent EMA property with minimum reflection loss of -23.9 dB@13.8 GHz,-26.5 dB@10.9 GHz,and -20.4 dB@14.5 GHz and the corresponding effective bandwidth of 5.2 GHz,3.2 GHz,and 4.8 GHz at 2.0 mm thickness for microwave treatment at 600℃,800℃,and 1000℃,respectively,which is much better than that of SiCN ceramic *** superior EMA performance is mainly attributed to the improved impedance matching,multireflection,multi-interfacial polarization,and micro current caused by migration of hopping electrons.

关键词： polymer-derived SiCNO ceramic aerogel SiC nanowires(SiC_(nw)) microwave heating electromagnetic absorption(EMA)performance