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Reduction and compensation of lattice stress in high energy P^+ and P+Sb implanted silicon

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Nuclear Science and Techniques 2000年第2期11卷 85-90页

作者： WU Yu-Guang ZHANG Tong-He ZHAO Shou-Nan ZHU Zhong-Hua(Key Laboratary for Radiation Beam Technology and Materials Modification,Institute of Low Energy Nuclear Physics (Beijing Radiation Center), Beijing Normal university, Beijing 100875 south china uni Key Laboratary for Radiation Beam Technology and Materials Modification Institute of Low Energy Nuclear Physics Beijing Radiation Center Beijing Normal University Beijing 100875 south china university of Technology Guangzhou 510064

The relations of variation of lattice stress to shape, peak concentrations of the P atom depth profile and Sb doses of P+Sb dual implantation were studied in high energy P implantation silicon. The experimental results show that the lattice stress in P-implanted silicon obviously increases with increasing ion dose. The stress of P-implanted silicon with the dose of 2×1013/cm2 is 2.2 times greater than at a dose of 3.6×1012/cm2. The stress decreases rapidly as the annealing time *** is very interesting that the stress has a negative value when the concentration of P atoms in the implanted layer is below 6×1016/cm3, whereas the stress becomes positive when the concentration is greater than 6×16/cm3. The stress increases rapidly with increasing Sb ion dose after P implantation. The stress has a positive value before annealing. If the Sb dose is below 1 ×1016/cm2, the stress is negative after annealing,and it is positive when the Sb dose is higher than 1×1016/cm2. The stress is close to zero for a Sb implantation dose of 1×1016/cm2. The best compensation dose of Sb to P implantation dose of 3×1016/cm2 is 1×1016/cm2.

关键词：双重掺杂半导体缺陷离子掺杂硅晶格磷铅

Robust multi-stream speech recognition based on weighting the output probabilities of feature components

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Chinese Journal of Acoustics 2009年第3期28卷 269-279页

作者： ZHANG Jun WEI Gang YU Hua NING Genxin College of Electronic & Information Engineering South China Uni. of Technology Guangzhou 510640

In the traditional multi-stream fusion methods of speech recognition, all the feature components in a data stream share the same stream weight, while their distortion levels are usually different when the speech recognizer works in noisy environments. To overcome this limitation of the traditional multi-stream frameworks, the current study proposes a new stream fusion method that weights not only the stream outputs, but also the output probabilities of feature components. How the stream and feature component weights in the new fusion method affect the decision is analyzed and two stream fusion schemes based on the mariginalisation and soft decision models in the missing data techniques are proposed. Experimental results on the hybrid sub-band multi-stream speech recognizer show that the proposed schemes can adjust the stream influences on the decision adaptively and outperform the traditional multi-stream methods in various noisy environments.

关键词： data Robust multi-stream speech recognition based on weighting the output probabilities of feature components

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蔗糖的使用特性与糖业的发展

中国甜菜糖业 1998年第6期 27-30页

作者：郭祀远李琳蔡妙颜郭建明华南理工大学轻化工研究所广州510641

本文在论述蔗糖的甜味特性、生理特性和食品加工特性之后，重点分析了世界蔗糖的产销现状和我国制糖工业的发展前景，认为，尽管我国蔗糖生产的发展道路不平坦，但总的发展趋势是向前的。

关键词：蔗糖生产特性发展前景市场制糖工业

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Spreading Wings

china Today 2024年第11期73卷 30-32页

作者： china TODAY 不详

Chinese company EHang leads the eVTOL industry to revolutionize transport,delivery,and emergency *** accidents changed the direction of Hu Huazhi’s *** was the death of a pilot friend who hit a power line while flying an aircraft to spray *** other was the death of his helicopter instructor during a *** two tragedies deeply affected Hu,today founder,president,and CEO of EHang,the autonomous aerial vehicle company based in Guangzhou,south china,and made him determined to develop a pilot-less aircraft that could carry passengers *** 2014,he founded EHang,which focuses on research and development of unmanned aerial vehicle systems and solutions.

关键词： instru autonomous pilot

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炼油废水H-O-R工艺中试运行探索

茂名学院学报 2002年第3期12卷 31-34页

作者：张冬梅王培风沈豪祥李宗宝肖锦茂名学院化工学院广东茂名525000 浙江水电专科学校浙江杭州310016 华南理工大学广东广州510641

模拟茂石化炼油废水生化处理系统 ,在二沉池中加入软性纤维添料 ,使之具有反硝化脱氮的功能后 ,用H -O -R工艺 (即水解酸化 -好氧 -脱氮 )的方式运行 ,不但使泥水分离效果更好 ,而且改进了传统的脱氮工艺 ,弥补由于原工艺中构筑物的原... 详细信息

模拟茂石化炼油废水生化处理系统 ,在二沉池中加入软性纤维添料 ,使之具有反硝化脱氮的功能后 ,用H -O -R工艺 (即水解酸化 -好氧 -脱氮 )的方式运行 ,不但使泥水分离效果更好 ,而且改进了传统的脱氮工艺 ,弥补由于原工艺中构筑物的原因造成废水无法回流脱氮的缺陷。中试运行结果表明 ,COD、Oil、Ar -OH、NH3 -N、S2 -的降解率分别达到 90 % ,97% ,99% ,84 % ,99% ;当供给适量C源、DO <1mg/L、温度在 2 5～ 4 0℃时 ,NOx -N降解率可达 75～ 90 % ,各污染指标均达到国家和DB4 4 / 5 6 -

关键词：炼油废水处理试运行 H-O-R工艺二沉池脱氮

林克明旧居修缮与活化利用,广州,广东,中国

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世界建筑 2024年第8期 64-69页

作者： Guangdong Architectural Design and Research Institute Group Co.,Ltd. Architectural Design and Research Institute of south china university of Technology 广东省建筑设计研究院集团股份有限公司华南理工大学建筑设计研究院有限公司

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑... 详细信息

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑形体呈现出迷人的风采。

关键词：建筑形体建筑理念活化利用功能与空间著名建筑师林克明修缮城墙

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番禺市桥先锋社区微改造,广州,广东,中国

世界建筑 2024年第4期 50-53页

作者： Guangzhou Atelier cnS Architectural Design Limited Company School of Architecture, south china university of Technology Guangzhou Urban Planning and Design Company Limited 广州市竖梁社建筑设计有限公司华南理工大学建筑学院广州市城市规划设计有限公司

先锋社区位于市桥之心,自古以来承担着番禺政商中心的城市职能,是千年番禺历史文化的缩影,拥有显赫的宗族聚落文化和丰富的工商贸易文化遗存。21世纪以来,因番禺积极融入广州主城区发展,向北形成经济、教育、居住集聚区,导致番禺城市重... 详细信息

先锋社区位于市桥之心,自古以来承担着番禺政商中心的城市职能,是千年番禺历史文化的缩影,拥有显赫的宗族聚落文化和丰富的工商贸易文化遗存。21世纪以来,因番禺积极融入广州主城区发展,向北形成经济、教育、居住集聚区,导致番禺城市重心北移,市桥的功能和空间日渐衰落,成为番禺城市发展的洼地,旧日荣光不再。在中国全面推进城镇老旧小区改造的背景下,本项目以历史文化保护与集体回忆再现为导向,探究不同于一般老旧社区微改造的新路径、新思路。

关键词：历史文化保护老旧社区城市职能微改造集聚区集体回忆重心北移文化遗存

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中共二十届三中全会为非洲发展带来重大机遇

当代世界 2024年第8期 78-79页

作者： [南非]谭哲理南非哲理中非国际交流智库

2024年7月15—18日,中国共产党第二十届中央委员会第三次全体会议召开,审议通过了《中共中央关于进一步全面深化改革、推进中国式现代化的决定》(下称《决定》)。中共中央总书记习近平作了重要讲话。作为平等伙伴关系下的朋友和兄弟,非... 详细信息

2024年7月15—18日,中国共产党第二十届中央委员会第三次全体会议召开,审议通过了《中共中央关于进一步全面深化改革、推进中国式现代化的决定》(下称《决定》)。中共中央总书记习近平作了重要讲话。作为平等伙伴关系下的朋友和兄弟,非洲国家认识到,中共二十届三中全会及其决定不仅对中国意义重大,也为非中合作带来更多机遇。

关键词：中国式现代化中共中央总书记全面深化改革三中全会重大机遇《决定》中央委员会习近平

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Microwave peak absorption frequency of liquid

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Science china(Physics,Mechanics & Astronomy) 2008年第9期51卷 1254-1263页

作者： HAN GuangZe1 & CHEN MingDong2 1 Department of Physics,south china university of Technology,Guangzhou 510640,china 2 Guangzhou Auto College,south china university of Technology,Guangzhou 510800,china 1. Department of Physics South China University of Technology Guangzhou 510640 China 2. Guangzhou Auto College South China University of Technology Guangzhou 510800 China

Microwave-assisted extraction is a new effective method which has practical ap-plications in many fields. Microwave heating is one of its physical mechanisms,and it also has the characteristic of selectivity. When the applied microwave fre-quency equals a certain absorption frequency of the material (or specific compo-nent),the material will intensively absorb microwave energy. This is also known as resonant absorption,and the frequency is called the peak absorption frequency which depends on the physical structure of the material. In this work,dynamic hy-drogen bond energy was included in molecular activation energy; with the liquid cell model,the expression of interaction energy between dipolar molecules was derived. The rotational relaxation time was gotten from the Eyring viscosity formula. Then based on the relationship between dielectric dissipation coefficient and re-laxation time,the expression of microwave peak absorption frequency as a func-tion of the material physical structure,rotational inertia and electrical dipole mo-ment of molecules was established. These theoretical formulas were applied to water and benzene,and the calculated results agree fairly well with the experi-mental data. This work can not only deepen the study of the interaction between microwave and material,but also provide a possible guide for the experiment of microwave-assisted extraction.

关键词： microwave-assisted extraction microwave heating relaxation time liquid viscosity peak absorption fre-quency