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浙江大学学报（工学版） 2012年第3期46卷 482-488,541页

作者：周志军姜旭东周俊虎刘建忠岑可法浙江大学能源清洁利用国家重点实验室浙江杭州310027

为了能够更深入地了解煤粉在富氧气氛下的燃烧机理,尤其是煤粉富氧着火模式的判断,在热重分析仪上,模拟了不同氧气体积分数下的煤粉富氧燃烧过程.选取5个不同的氧气体积分数:2.%、40%、60%、80%和100%,并且模拟了2.气氛下(N2.O2.CO2.O2...

为了能够更深入地了解煤粉在富氧气氛下的燃烧机理,尤其是煤粉富氧着火模式的判断,在热重分析仪上,模拟了不同氧气体积分数下的煤粉富氧燃烧过程.选取5个不同的氧气体积分数:2.%、40%、60%、80%和100%,并且模拟了2.气氛下(N2.O2.CO2.O2.和不同颗粒大小的煤粉的富氧燃烧过程.并根据普适积分法,计算了煤粉的活化能和指前因子.提出了一种根据TG-DTG曲线判断煤粉着火模式的新方法,它使得煤粉着火模式的判断更为准确.研究发现,在CO2.O2.氛下的富氧燃烧过程中,当煤粉粒径小于40μm时,煤粉发生非均相着火;当煤粉粒径大于2.0μm时,煤粉发生均相着火.大颗粒比小颗粒受氧气体积分数变化的影响要大.

关键词：热重分析着火模式煤粉富氧燃烧活化能

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挖掘机电液流量匹配控制系统流量补偿试验

浙江大学学报（工学版） 2012年第8期46卷 1382-1389页

作者：徐兵刘伟杨华勇张圣峰浙江大学流体动力与机电系统国家重点实验室浙江杭州310027 中联重科股份有限公司湖南长沙410013

为改善挖掘机液压系统的操控性和节能性,采用电比例泵和电比例多路阀同步控制方式的电液流量匹配控制系统.以2.挖掘机试验样机为研究对象,分析电液流量匹配控制系统的结构原理和特点;针对挖掘机轻重负载不同工况,测试系统的压力和流量特... 详细信息

为改善挖掘机液压系统的操控性和节能性,采用电比例泵和电比例多路阀同步控制方式的电液流量匹配控制系统.以2.挖掘机试验样机为研究对象,分析电液流量匹配控制系统的结构原理和特点;针对挖掘机轻重负载不同工况,测试系统的压力和流量特性,通过试验研究基于压力特性的开环流量补偿方法.利用实时检测的油缸速度间接实现流量闭环控制,试验分析动臂、铲斗单执行器动作和复合动作的速度控制特性,并对系统进行变负载、变速度工况测试.试验结果表明:采用流量补偿方法提高系统的流量控制精度;电液流量匹配控制系统与负载敏感系统相比,泵的压力裕度减小0.6～0.7MPa,提高了系统的节能性和动态响应性.

关键词：电液流量匹配控制挖掘机流量补偿负载敏感系统

Characterization of a Strain Capable of Degrading a Herbicide Mixture of Quinclorac and Bensulfuronmethyl

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Pedosphere 2008年第5期18卷 554-563页

作者： Lǖ Zhen-Mei LI Zi-Mu SANG Li-Ya MIN Hang College of Life Sciences Zhejiang University Hangzhou 310058 （China）

A bacterial strain,designated as LS,was isolated from a contaminated soil and was found to be capable of utilizing quinclorac,bensulfuronmethyl,and a mixture of the two as carbon and energy sources for growth. Strain LS was identified as Ochrobactrum sp. based on its physiological-biochemical properties,16S rDNA sequences,and phylogenetic analysis. The extent of degradation of quinclorac and bensulfuronmethyl at initial concentrations of 1.5 and 0.1 g L-1 was 90% and 67%,respectively,as measured by high performance liquid chromatography(HPLC) . When a herbicide mixture of 0.34 g L-1 quinclorac and 0.02.g L-1 bensulfuronmethyl was applied as carbon sources,quinclorac and bensulfuronmethyl were degraded at 95.7% and 67.5%,respectively. It appears that quinclorac is utilized more easily in a mixture than in a single state. The optimal temperature for growth of strain LS was 37 ℃. Strain LS grew well at pH 6 to 9 and had the highest degradation level for quinclorac and bensulfuronmethyl at an initial pH of 7 and 8,respectively. Addition of 0.2. g L-1 yeast extract could promote the growth and extent of degradation of quinclorac and bensulfuronmethyl by strain LS. Strain LS also showed the capability to degrade other aromatic compounds such as catechol,propisochlor,4-chloro-2.methylphenoxyacetic acid sodium(MCPA-Na) and imazethapy. The isolate LS shows a huge potential to be used in bioremediation for treating complex herbicide residues.

关键词： bensulfuronmethyl degradation herbicide mixture Ochrobactrum sp. quinclorac

Synthesis and Luminous Characteristics of Ba2.iO3Cl2.Eu2.,Mn2. Phosphor for White LED

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Synthesis and Luminous Characteristics of Ba2SiO3Cl2:Eu2+,Mn...

Pulse transmission simulation in the systems including diffraction components by real ray trace

2.07亚洲光电子会议LED材料与器件分会场

作者： Shen Changyu a,b Yang Yi a,Jin Shangzhong a a Optical Engineering, china Jiliang university, {2., 310018 b state key laboratory of Modern Optical Instrumentation, zhejiang university, {2., 3.002.

Ba2.iO3Cl2.Eu2., Mn2. phosphor was synthesized by high-temperature solid state reaction at 9002.0°C in a slightly reducing atmosphere for 2.0.0 hours. The raw materials were the mixture of BaCO3, SiO2. MnCO3, NH4Cl, and Eu2.3 in the mol ratio of 3, 2. 0.004, 2.and 0.02. Ba2.iO3Cl2.Eu2., Mn2. phosphor’s absorption and luminescence spectra were studied. The results indicated that the emission band consists of three peaks located at 42. nm, 492.m and 608nm, respectively. The emission peaks at 42. and 492.m originate from the transition 5d →4f of Eu2. ions that occupy the two Ba2. sites in the crystal of Ba2.iO3Cl2. while the 608nm emission is attributed to the energy transfer from Eu2. ions to Mn2. ions. The white light can be obtained by mixing the three emission colors of blue (42. nm), green (492.nm) and red-orange (608 nm) in the single host. When the concentrations of the Eu2. ions and Mn2. ions were 0.02.ol and 0.004mol respectively, the sample presented intense white emitting. The excitation spectra of the three emissions extending from 300 nm to 460 nm indicated that Ba2.iO3Cl2.Eu2. phosphor can be excitated by InGaN chip UV emission effectively, and it is a single-phase white phosphor with low-cost and high brightness for white LEDs.

关键词： High-temperature solid-state reaction Phosphor Ba2.iO3Cl2.Eu2., Mn2.

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Pulse transmission simulation in the systems including diffr...

不同温度下炉内喷射氨水脱除NO_x的模拟与试验研究

2.07亚洲光电子会议高能激光器及应用分会场

作者： Li Xiaotong Cen Zhaofeng Deng Shitao state key {2. of Modern Optical Instrumentation zhejiang university hangzhou 3.002. P.R.china

The method of real ray trace for the time characteristic analyzing of laser pulse is presented. By tracing the sampling rays with optical path or phase initialized by given input pulse and limited by the entrance pupil, the output pulse samples are calculated including the pulse width and energy distribution and the fitting pulse curve is obtained. Further more, this method can be also used for analyzing the affection of the tolerance in pulse transmission systems to the beam quality. Taking some pulse transmission systems as examples in which there are different diffraction components such as diffraction gratings, binary optical elements and holographic elements, the output pulse curves come from different input pulse are given, and the functions of different diffraction elements as pulse boarder and compressor are compared. As shown by the results that the multiple diffraction of binary optical elements will not only generates multiple focus points at the output space to affect the space quality of laser beam, but also leads to broad the pulse width so as to change the laser’s time characteristics.

关键词： High power laser short pulse diffraction components ray trace

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燃料化学学报 2004年第1期32卷 48-53页

作者：王智化周昊周俊虎樊建人岑可法浙江大学能源洁净利用与环境工程教育部重点实验室浙江杭州310027

在一台小型沉降炉上进行了氨水喷射还原烟气中NOx的SNCR(SelectiveNon CatalyticReduction)实验研究,同时结合化学反应动力学模型研究了NH3还原NO过程中的关键影响因素,结果发现,过高的温度引起氨水的氧化,过低的温度不利于NO的还原,存... 详细信息

在一台小型沉降炉上进行了氨水喷射还原烟气中NOx的SNCR(SelectiveNon CatalyticReduction)实验研究,同时结合化学反应动力学模型研究了NH3还原NO过程中的关键影响因素,结果发现,过高的温度引起氨水的氧化,过低的温度不利于NO的还原,存在一个单一的温度区间,在该试验台上最佳的氨水喷射温度范围为850℃～1100℃,最高达到了82.的NO还原率;采用均相反应模型与试验结果进行了对比,在高温区吻合情况较好;当温度高于950℃时,NH3残留量可以忽略;NH2.两类支链反应对于整个反应起重要作用。

关键词：氨水 SNCR NOx NH3/NO摩尔比 NH3

ELECTROCHEMICAL NOISE ANALYSIS OF PURE ALUMINUM IN SODIUM CHLORIDE SOLUTION WITH WAVELET TRANSFORM TECHNIQUE

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Acta Metallurgica Sinica(English Letters) 2002年第3期15卷 272-278页

作者： Z. Zhang, Q.D. Zhong, J.Q. Zhang, Y.L. Cheng, F.H. Cao, J.M. and C.N. CaoDepartment of Chemistry, zhejiang university, hangzhou 3.002., {2.Electrochemical Research Group, Shanghai university of Electric Power, Shanghai 2.0090, {2.state key laboratory Dept. of Chem. Zhejiang Univ. Hangzhou 310037 China

Wavelet transforms (WT) are proposed as an alternative tool to overcome the limitations of Fourier transforms (FFT) in the analysis of electrochemical noise (EN) data. The most relevant feature of this method of analysis is its capability of decomposing electrochemical noise records into different sets of wavelet coefficients, which contain information about the time scale characteristic of the associated corrosion event. In this context, the potential noise fluctuations during the free corrosion of pure aluminum in sodium chloride solution was recorded and analyzed with wavelet transform technique. The typical results showed that the EN signal is composed of distinct type of events, which can be classified according to their scales, i.e. their time constants. Meanwhile, the energy distribution plot (EDP) can be used as 'fingerprints' of EN signals and can be very useful for analyzing EN data in the future.

关键词： electrochemical noise wavelet analysis Fourier transforms corrosion pure aluminum

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逆向涡流等离子体降解飞灰中二恶英的研究

浙江大学学报（工学版） 2012年第4期46卷 584-589,598页

作者：倪明江程奎余量李晓东陆胜勇严建华浙江大学能源清洁利用国家重点实验室浙江杭州310027

利用氮气逆向涡流非平衡等离子体反应器,进行医疗垃圾焚烧飞灰中二恶英的降解.考察氮气逆向涡流非平衡等离子体放电特性,从而获得反应器稳定的工作条件.在实验过程中分别测量处理后飞灰中和尾气中的二恶英质量分数,分析利用氮气逆向涡... 详细信息

利用氮气逆向涡流非平衡等离子体反应器,进行医疗垃圾焚烧飞灰中二恶英的降解.考察氮气逆向涡流非平衡等离子体放电特性,从而获得反应器稳定的工作条件.在实验过程中分别测量处理后飞灰中和尾气中的二恶英质量分数,分析利用氮气逆向涡流非平衡等离子体反应器降解飞灰中二恶英的效果,初步探索二恶英的降解机理.结果表明,切向进气体积流量是影响放电电弧特性的关键因素,增大切向进气体积流量,可以提高电弧放电的稳定性;逆向涡流等离子体对飞灰中二恶英有明确的降解作用,单位质量飞灰中PCDD/Fs总质量的平均降解率为49.6%,总毒性当量I-TEQ平均降解率为62.3%,飞灰中PCDFs比PCDDs更容易降解.

关键词：逆向涡流非平衡等离子体二恶英飞灰降解

在Si-Ge晶体外延生长中的RHEED花样研究

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物理学报 2009年第11期58卷 7765-7772页

作者：张冲叶辉张磊皇甫幼睿刘旭浙江大学现代光学仪器国家重点实验室杭州310027

在晶体衍射理论基础上,利用运动学理论解释了反射式高能电子衍射(reflection high energy electron diffraction,RHEED)在Si-Ge晶体外延生长过程中不同阶段出现的花样.尤其研究了晶体岛状生长之后出现的RHHED透射式衍射花样,并给出了相... 详细信息

在晶体衍射理论基础上,利用运动学理论解释了反射式高能电子衍射(reflection high energy electron diffraction,RHEED)在Si-Ge晶体外延生长过程中不同阶段出现的花样.尤其研究了晶体岛状生长之后出现的RHHED透射式衍射花样,并给出了相应的解释.解释了硅锗外延生长过程中的多晶环图案和孪晶衍射图案的含义,并给出各个生长阶段演化的工艺条件.

关键词：硅锗外延生长反射式高能电子衍射表面重构透射式衍射花样