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Adsorptive Desulfurization of Propylmercaptan and Dimethyl Sulfide by CuBr_2 Modified Bentonite

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China Petroleum Processing & Petrochemical Technology 2015年第2期17卷 57-63页

作者： Cui Yuanyuan Lu Yannan yi dezhi Shi Li Meng Xuan The State Key Laboratory of Chemical Engineering East China University of Science and Technology

Adsorptive desulfurization for removing propylmercaptan （PM） and dimethyl sulfide （DMS） over CuBr2 modi- fied bentonite was investigated under ambient conditions in this work. A saturated sulfur capacity as high as 196 mg of S per gram of adsorbent was demonstrated. The influence of loading amount of Cu （II） and calcination temperature on adsorptive desulfurization was investigated. Test results revealed that the optimum loading amount of Cu （II） was 15%, and the calcination temperature was 150 ℃. The pyridine-FTIR spectroscopy showed that a certain amount of Lewis acid could contribute to the increase of adsorption capacity. Spectral shifts of the v（C-S） and v（Cu-S） vibrations were detected from the Raman spectra of the Cu （II） complex which was a reaction product of CuBr2 with DMS. According to the hybrid orbital theory and the complex adsorption reaction, the desulfurization of PM and DMS over the CuBr2 modified bentonite is ascribed to the formation of S-M （σ） bonds.

关键词： desulfiarization bentonite propylmercaptan dimethyl sulfide mechanism

Study on ReactiveAdsorption Desulfurization of Model Gasoline on Ni/ZnO-HY Adsorbent

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China Petroleum Processing & Petrochemical Technology 2013年第3期15卷 57-64页

作者： Huang Huan Salissou M.Nour yi dezhi Meng Xuan Shi Li State Key Laboratory of Chemical Engineering East China University of Science and Technology

The reactive adsorption desulfurization of model gasoline was carried out on Ni/ZnO-HY *** Ni/ZnO-HY adsorbent was characterized by N2adsorption-desorption test(BET),X-ray diffractometry(XRD),and temperature-programmed reduction(TPR)*** test results have demonstrated that HY-zeolite is a feasible support for Ni/ZnO components used in reactive adsorption *** results of XRD and TPR analyses showed that most of nickel element was present as Ni2+species with only a small part existing as Ni3+species,and the Ni2+species had interactions with *** the conditions of this study,which specified a 50% ratio of HY-zeolite in the adsorbent,a Zn/Ni molar ratio of 10,and a reduction temperature of 400℃,the Ni/ZnO-HY adsorbent showed the best desulfurization *** sulfur capacity of Ni/ZnO-HY adsorbent could be recovered to 92.19% of the fresh one after being subjected to regeneration at 500℃,and could be maintained at 82.17% of the fresh one after 5 regeneration cycles.

关键词： desulfurization reactive adsorption S-Zorb Ni/ZnO HY-zeolite

Effects of Silylation on Zn-IM5 and Its Catalytic Activity for Butane Aromatization

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China Petroleum Processing & Petrochemical Technology 2016年第1期18卷 44-50页

作者： Yu Lei yi dezhi Lu Yannan Shi Li Chen Junwen Meng Xuan The State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 SINOPEC Research Institute of Petroleum Processing Beijing 100083

Effects of silylation on surface properties and catalytic performance of Zn-IM5 for butane aromatization were studied in this paper. Collidine-IR and NH3-TPD analyses revealed that the silylation treatment not only decreased the quantity of both strong and weak acid sites but also led to a slightly reduced intensity of weak acidity. Silylation of the catalyst promoted the selectivity of BTX by narrowing the channel and cutting the acidity. The effect of temperature of silylation and amount of Si loading were evaluated. The best condition has specified a temperature of 50 ℃ and a SiO_2 loading of 4.0%.

关键词： silylation Zn-IM5 aromatization

SAF-CNN:面向嵌入式FPGA的卷积神经网络稀疏化加速框架

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计算机研究与发展 2023年第5期60卷 1053-1072页

作者：谢坤鹏仪德智刘义情刘航赫鑫宇龚成卢冶南开大学计算机学院天津300350 南开大学网络空间安全学院天津300350 南开大学软件学院天津300350 天津市网络与数据安全技术重点实验室(南开大学) 天津300350 处理器芯片全国重点实验室(中国科学院计算技术研究所) 北京100190

传统的卷积神经网络加速器及推理框架在资源约束的FPGA上部署模型时,往往面临设备种类繁多且资源极端受限、数据带宽利用不充分、算子操作类型复杂难以适配且调度不合理等诸多挑战.提出一种面向嵌入式FPGA的卷积神经网络稀疏化加速框架(... 详细信息

传统的卷积神经网络加速器及推理框架在资源约束的FPGA上部署模型时,往往面临设备种类繁多且资源极端受限、数据带宽利用不充分、算子操作类型复杂难以适配且调度不合理等诸多挑战.提出一种面向嵌入式FPGA的卷积神经网络稀疏化加速框架(sparse acceleration framework of convolutional neural network, SAF-CNN),通过软硬件协同设计的方法,从硬件加速器与软件推理框架2个角度进行联合优化.首先, SAF-CNN构建并行计算阵列,并且设计并行编解码方案,实现单周期多数据的传输,有效减少通信代价.其次,设计细粒度结构化块划分剪枝算法,于输入通道维度进行块内裁剪来获得稀疏且规则的权重矩阵,借此显著降低计算规模和DSP乘法器等资源占用.然后,提出一种兼容深度可分离卷积的输入通道维度动态拓展及运行时调度策略,实现输入通道参数灵活适配与逐通道卷积和逐点卷积的资源复用.最后,提出一种计算图重构及硬件算子融合优化方法,提升硬件执行效率.实验采用2种资源受限的低端FPGA异构平台Intel CycloneV与Xilinx ZU3EG,结果表明SAF-CNN加速器可分别实现76.3GOPS与494.3GOPS的计算性能.与多核CPU相比,SAF-CNN在进行SSD_MobileNetV1目标模型检测时,可实现3.5倍与2.2倍的性能提升,模型推理速度高达26.5fps.

关键词：卷积神经网络模型压缩计算图加速器设计推理框架

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科研型研究生新生如何更好更快地代入新角色

成都中医药大学学报（教育科学版） 2016年第4期18卷 33-36页

作者：邹蓉屈艺母得志四川大学华西第二医院儿科/出生缺陷与相关妇儿疾病教育部重点实验室/育与妇儿疾病四川省重点实验室四川成都610041

近年来,研究生教育"本科化"趋势愈演愈烈,科研型研究生新生的科研能力现状令人担忧。在现行培养方案切实有效的前提下,缩短其科研"新手期"、使其尽快"入门",不失为一种使科研型研究生在有限的培养过程中获得更多成长的方法。本文通过分... 详细信息

近年来,研究生教育"本科化"趋势愈演愈烈,科研型研究生新生的科研能力现状令人担忧。在现行培养方案切实有效的前提下,缩短其科研"新手期"、使其尽快"入门",不失为一种使科研型研究生在有限的培养过程中获得更多成长的方法。本文通过分析现阶段研究生普遍面临的困难和问题,从学生自身角度出发,提出相应解决方案,以帮助科研型研究生新生更好、更快地代入新角色,熟悉并进入科研新课堂。

关键词：科研型研究生新生培养自我提升快速入门

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一种全新的网上教育存储服务器的设计与实现

计算机工程 2000年第9期26卷 155-157页

作者：韩德志易法令华中理工大学计算机学院荆州师范学院计算机系

介绍了一种全新的网络教育存储体系结构－－附网存储服务器技术，提出了一种网上教育存储服务器的设计方案，并对其软件、硬件构成及Ｗｅｂ管理进行了详细论述．

关键词： CAI 网上教育存储服务器

A portable single-cell analysis system integrating hydrodynamic trapping with broadband impedance spectroscopy

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Science China(Technological Sciences) 2017年第11期60卷 1707-1715页

作者： TANG WenLai TANG dezhi NI ZhongHua XIANG Nan yi Hong Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 211189China

In this paper, we present a portable single-cell analysis system with the hydrodynamic cell trapping and the broadband electrical impedance spectroscopy （EIS）. Using the least flow resistance path principle, the hydrodynamic cell trapping in serpentine arrays can be carried out in a deterministic and automatic manner without the assistance of any external fields. The experimental results show that a cell trap rate of higher than 95% can be easily achieved in our ceil trapping microdevices. Using the maximum length sequences （MLS） technique, our home-made EIS is capable of measuring the impedance spectrum ranging from 1.953 kHz to 1 MHz in approximately 0.5 ms. Finally, on the basis of the developed single-cell analysis system, we precisely monitor the trapping process of human breast tumor cells （MCF-7 cells） according to the changes of electrical impedance. The MCF-7 cells with different trapping conditions or sizes can also be clearly distinguished through the impedance signals. Our portable single-cell analysis system may provide a promising tool to monitor single cells for long periods of time or to discriminate cell types.

关键词： single-cell analysis hydrodynamic cell trapping broadband impedance spectroscopy maximum length sequences

Comparative study on the efficiency and environmental impact of two methods of utilizing polyvinyl chloride waste based on life cycle assessments

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 451-462页

作者： Yuehui WU Guoliang WANG Zhen WANG yi LIU Ping GU dezhi SUN School of Municipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China Environmental Monitoring Center of Heilongjiang Province Harbin 150056 China College of Environmental Science & Engineering Beijing Forestry University Beijing 100083 China

Two processes of utilizing polyvinyl chloride （PVC） waste, an incineration process and a vacuum pyrolysis process, for energy conversion were compared to determine their efficiency and environmental perfor- mance. We carried out a life cycle assessment with each of the two processes to evaluate their environmental impact and defined the goals and limits of our remit. As well, we established an inventory of PVC waste from incineration and vacuum pyrolysis based on process analysis, data collection and calculations. The results show that electrical power output per unit mass of PVC waste in the incineration process was twice as high as that of the vacuum pyrolysis process. Incineration had a larger total environmental impact potential than vacuum pyrolysis. The total environmental impact potential of PVC waste from incineration was three times higher than that from vacuum pyrolysis. Incineration of PVC disposed 300 ng. 100 kgI of dioxins and vacuum pyrolysis 98.19 ng- 100 kgI of dioxins. As well, we analyzed the data for their uncertainty with results quantified in terms of three uncertainties： basic uncertainty, additional uncertainty, and computational uncertainty. The coefficients of variation of the data were less than 25% and the quality of the inventory data was acceptable with low uncertainty. Both PVC waste disposal processes were of similar quality and their results comparable. The results of our life cycle impact assessment （LCIA） showed considerable reliability of our methodology. Overall, the vacuum pyrolysis process has a number advantages and greater potential for development of PVC disposal than the incineration process.

关键词： polyvinyl chloride waste utilization incineration process vacuum pyrolysis process life cycle assess-ment

Preparation and Characterization of Mullite-Silicon Carbide Heat Absorbing Ceramics for Solar Thermal Tower Plant

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Journal of Wuhan University of Technology(Materials Science) 2015年第1期30卷 27-32页

作者：徐晓虹 RAO Zhenggang WU Jianfeng ZHOU Yang HE dezhi LIU yi School of Material Science and Engineering Wuhan University of Technology

The in-situ synthesized mullite bonded SiC ceramics for solar thermal tower plant were prepared from Silicon carbide （SIC）, manufactured aluminum hydroxide （Al（OH）3） and Suzhou kaolin via semi-dry pressing and pressureless firing. The results indicate that sample B3 （designed mullite content 15 wt%） fired at 1 400 ℃ exhibited optimal performance with a bending strength of 97.41 MPa. Sample B3 can withstand 30-cycles thermal shock without cracking （wind cooling from 1 100 ℃ to room temperature）, and the bending strength after thermal shock decreased by 17.92%. When the service temperature is 600℃, the thermal diffusivity, specific heat capacity, thermal conductivity and heat capacity are 6.48× 10-2 cm：.s-1, 0.69 kJ·kg-1. K-1, 9.62 W·m-1·K-1 and 977.76 kJ·kg-1, respectively. The XRD and SEM results show that SiC, mullite, or-quartz, and tridymite are connected closely, which gives the material a good bending strength. After 30-time thermal shock cycles, the structure of samples becomes loose. SiC grains are intersectingly arranged with rodshape mullite, exhibiting a favorable thermal shock resistance. The addition of Al（OH）3 and Suzhou kaolin can accelerate the synthesis of mullite, thus to reduce the firing temperature effectively. The volume effect of tfidymite is relatively small, improving the thermal shock resistance of materials. A higher designed muUite content yields a lower loss rate of bending strength. The mullite content should not be more than 15 wt% or else the bending strength would be diminished.

关键词： heat absorbing materials mullite-SiC composite ceramics thermal shock resistance thermal properties