检索结果-南通市图书馆

Optimization of phenol degradation by Candida tropicalis Z-04 using Plackett-Burman design and response surface methodology

引用

Journal of Environmental Sciences 2011年第1期23卷 22-30页

作者： Jiangya zhou Xiaojuan Yu Cong Ding Zhiping Wang Qianqian zhou Hao Pao weimin Ca School of Environmental Science and Engineering Shanghai Jiaotong University Dongchuan Road 800 Shanghai 200240 China.

Statistical experimental designs were used to optimize the process of phenol degradation by Candida tropicalis Z-04, isolated from phenol-degrading aerobic granules. The most important factors influencing phenol degradation （p 〈 0.05）, as identified by a two-level Plackett-Burman design with 11 variables, were yeast extract, phenol, inoculum size, and temperature. Steepest ascent method was undertaken to determine the optimal regions of these four significant factors. Central composite design （CCD） and response surface analysis were adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum phenol degradation. The analysis results indicated that interactions between yeast extract and temperature, phenol and temperature, inocuhim size and temperature affected the response variable （phenol degradation） significantly. The predicted results showed that the maximum removal efficiency of phenol （99.10%） could be obtained under the optimum conditions of yeast extract 0.41 g/L, phenol 1.03 g/L, inoculum size 1.43% （V/V） and temperature 30.04℃. These predicted values were further verified by validation experiments. The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy. This study indicated the excellent ability of C. tropicalis Z-04 in degrading high-strength phenol. Optimal conditions obtained in this experiment laid a solid foundation for further use of this microorganism in the treatment of highstrength phenol effluents.

关键词： phenol degradation Candida tropicalis Z-04 optimization Plackett-Burman design response surface methodology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure of in-situ Synthesized (TiB+TiC)/Ti Composites Prepared by Hot-pressing

引用

Journal of Materials Science & Technology 2003年第Z1期19卷 101-102页

作者： Zhenzhu ZHENG Lin GENG Honglin WANG weimin zhou Hongyu XU School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Hei Long Jiang Education College Harbin 150008 China

In-situ 5 *** TiB whiskers and TiC particulates reinforced Ti composites were fabricated by blending Ti powderand B4C particulates followed by reactive hot-pressing. The microstructure of the composites was investigated byusing differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscope (TEM)and scanning electron microscope (SEM). The results showed that the reactive temperature between Ti and B4C isabove 570°. Two kinds of reinforcements with different shapes were formed during hot-pressing: TiB short-fiber andequiaxed TiC particles. The interracial bonding between the reinforcements and Ti matrix is perfect. No interracialreaction between reinforcements and Ti matrix was found.

关键词： Ti matrix composite, In-situ synthesis, Powder metallurgy

来源：

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

Study of algorithms of phase advance measurement between BPMs and its application in SSRF

引用

Nuclear Science and Techniques 2013年第1期24卷 7-11页

作者： CHEN Zhichu LENG Yongbin YUAN Renxian YAN Yingbing zhou weimin Shanghai Institute of Applied Physics Chinese Academy of Sciences

As a third generation light source, Shanghai Synchrotron Radiation Facility (SSRF) has up to 140 beam position monitors (BPM) installed to monitor the beam dynamics on its storage ring. Once the operation mode is chosen, the betatron functions are determined. Since the sinusoidal betatron oscillation is the dominant component of the transverse motion, these BPMs can be used to measure the motion to get the betatron functions. Three methods are compared to calculate the phase advance among the BPMs in this paper, aiming to find one or more feasible ways to check the beam optics in SSRF. Some experiments have also been made to verify the practicality of the phase information.

关键词：上海同步辐射装置束流动力学相位信息测量算法光源应用 SSRF 电子回旋

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transfiguration of extracting mirror in synchrotron radiation system at SSRF

引用

Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 151-153页

作者： CHEN Jie HUANG GuoQing zhou weimin YE KaiRong LENG YongBin Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 210200China

The first extracting mirror is very important for synchrotron radiation monitor (SRM). The SRM system of SSRF (Shanghai Synchrotron Radiation Facility) should extract the visible light with low optical distortion. The analysis of SR power spectrum and heat transfiguration based on Matlab is introduced in this paper, which will be used in calibration. One beryllium mirror with water-cooling is used to transmit X-ray and reflect visible light to satisfy the measurement request. The existing system suffers from a dynamic problem in some beam physics study. The system includes optics, image acquisition and interferometers. One of the instruments is a digital camera providing the image of the beam transverse profile. The hardware configuration will be summarized. The synchrotron radiation measurement system has been in operation in SSRF for more than one year.

关键词： extracting mirror synchrotron radiation monitor (SRM) transfiguration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-Order Interpolation Algorithms for Charge Conservation in Particle-in-Cell Simulations

引用

Communications in Computational Physics 2013年第4期13卷 1134-1150页

作者： Jinqing Yu Xiaolin Jin weimin zhou Bin Li Yuqiu Gu Vacuum Electronics National Laboratory University of Electronic Science and Technology of ChinaChengdu 610054China Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China

High-order interpolation algorithms for charge conservation in Particle-inCell(PIC)simulations are *** methods are valid for the case that a particle trajectory is a zigzag *** second-order and third-order algorithms which can be applied to any even-order and odd-order are discussed in this paper,*** test simulations are performed to demonstrate their validity in two-dimensional PIC *** with the simulation results of one-order,high-order algorithms have advantages in computation precision and enlarging the grid scales which reduces the CPU time.

关键词： High-order algorithms charge conservation PIC code CPU time

来源：

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

Design and measurement of signal processing system for cavity beam position monitor

引用

Nuclear Science and Techniques 2013年第2期24卷 1-6页

作者： WANG Baopeng LENG Yongbin YU Luyang zhou weimin YUAN Renxian CHEN Zhichu Shanghai Institute of Applied Physics Chinese Academy of SciencesJiading campus University of the Chinese Academy of Sciences

In this paper,in order to achieve the output signal processing of cavity beam position monitor(CBPM),we develop a digital intermediate frequency receiver architecture based signal processing system,which consists of radio frequency(RF) front end and high speed data acquisition *** beam position resolution in the CBPM signal processing system is superior to 1μ*** signal processing algorithms,fast Fourier transform(FFT) and digital down converter(DDC),are evaluated offline using MATLAB platform,and both can be used to achieve,the CW input signal,position resolutions of 0.31μm and 0.10μm at -16 *** DDC algorithm for its good compatibility is downloaded into the FPGA to realize online measurement,reaching the position resolution of 0.49μm due to truncation *** whole system works well and the performance meets design target.

关键词：信号处理系统位置分辨率在线测量设计目标显示器光束 MATLAB平台信号处理算法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monitoring the charge bunch-by-bunch for the SSRF storage ring:Development and application

引用

Nuclear Science and Techniques 2010年第4期21卷 193-196页

作者： LENG Yongbin YAN Yingbin YU Luyang YUAN Renxian CHEN Zhichu zhou weimin Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Shanghai 201800 China

Bunch charge uniformity controlling is very important for top-up operation of the storage *** order to monitor filling pattern and measure the bunch charge precisely,a PXI waveform digitizer-based data acquisition system has been developed to retrieve bunch charge information from BPM pickup *** effective sampling rate is extended to 400 GHz by waveform rebuilding technology,which overlays multi-turn data into single turn with real time sampling rate of 8 *** on-line evaluation indicates that resolution and linearity of the charge measurement are better than 0.5% at input range of 0.5-12nC.

关键词：储存环开发监测波形示波器应用光源上海束团

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Baseline recovery method to measure bunch charge under low-current mode of SSRF

引用

Nuclear Science and Techniques 2011年第5期22卷 261-264页

作者： CHEN Zhichu LENG Yongbin ZOU Yi YAN Yingbin zhou weimin Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Shanghai 201800 China

The top-up injection mode of Shanghai Synchrotron Radiation Facility(SSRF) needs precise measurement of the beam bunch *** is performed by an integration current transformer,but the beam current is too low to neglect the background *** order to wipe out the noise coming from the ground loops,the adaptable polynomial fitting method is used to extract the baseline,instead of using the constant background or the linear background model. Test results show that the system resolution can be improved to <3%.

关键词：上海同步辐射装置电流模式光源基线背景噪声电流互感器 SSRF 接地回路

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis of an ordered porous carbon with the dual nitrogen-doped interfaces and its ORR catalysis performance

引用

Chinese Chemical Letters 2021年第1期32卷 140-145页

作者： Hongwei Zhao Yanqiu Zhang Li Lixiang Xin Geng Haiming Yang weimin zhou Chengguo Sun Baigang An School of Chemical Engineering University of Science and Technology LiaoningAnshan 114051China Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province Anshan 114051China

Both nitrogen-doping feature and pore structure are critical factors for developing nitrogen-doped carbons based catalysts with a high performance toward oxygen reduction reaction(ORR).Herein,a simple one-step CVD of acetylene and acetonitrile vapor method using silanized SBA-15 as a template has been developed to synthesize an ordered porous carbon(OPC) with dual nitrogen-doped *** optimized sample as prepared with the CVD of 4 h at 750℃ contains two types of ordered mesopores that one type is the ordered cylindrical pores inheriting from the pores of SBA-15 and has a pore width of4.0~5.0 nm,the other type is the ordered quasi-hexagonal pores with a width of 3.0~4.0 nm produced by etching the pore walls of *** two types of pores whose pore walls are built by the nitrogen doped carbon layers resulted by the CVD and thus it actually makes the dual nitrogen-doped interfaced OPC(DN-OPC).Meanwhile,DN-OPC contains a few of micropores and a large SSA of 1430 m~2/*** dualordered pores and dual nitrogen-doped interfaces cannot only facilitate mass transport but also utilize the active sites of DN-OPC for ***,as metal-free ORR catalyst,DN-OPC exhibits a good activity close to commercial Pt/C catalyst,and an excellent durability and methanol tolerance.

关键词： Silanized SBA-15 Nitrogen-doped Dual-ordered pores CVD of acetonitrile Oxygen reduction reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nanoimprint Lithography:A Processing Technique for Nanofabrication Advancement

引用

Nano-Micro Letters 2011年第2期3卷 135-140页

作者： weimin zhou Guoquan Min Jing Zhang Yanbo Liu Jinhe Wang Yanping Zhang Feng Sun Laboratory of Nanotechnology Shanghai Nanotechnology Promotion Center (SNPC)

Nanoimprint lithography(NIL) is an emerging micro/nano-patterning technique,which is a high-resolution,high-throughput and yet simple fabrication *** to International Technology Roadmap for Semiconductor(ITRS),NIL has emerged as the next generation lithography candidate for the22 nm and 16 nm technological *** this paper,we present an overview of nanoimprint *** classfication,research focus,critical issues,and the future of nanoimprint lithography are intensively elaborated.A pattern as small as 2.4 nm has been ***-wafer nanoimprint lithography has been completed on a 12-inch ***,12.5 nm pattern resolution through soft molecular scale nanoimprint lithography has been achieved by EV Group,a leading nanoimprint lithography technology supplier.

关键词： Nanoimprint lithography Soft molecular scale Nanofabrication

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：