单片机仿真实验的探讨与研究

本文介绍了传统的单片机实验方法和利用Proteus（http：／／www．labcenter.co．uk）软件进行单片机仿真实验。包括从元器件的选择、电路的连结、源程序的输入及调试、仿真结果的输出，并比较了各自的特点。     

Development of the CAS-IBB single-particle microbeam for localized irradiation of living cells

A single-particle microbeam facility has been constructed at the Key Laboratory of Ion Beam Bioengineering (LIBB), Chinese Academy of Sciences (CAS). The system was designed to deliver a defined numbers of hydrogen ions, produced by a van de Graaff accelerator, in an energy range of 2.0-3.0 MeV, into an area smaller than that of the nucleus of an individual living cell. The beam is collimated by a borosilicate glass capillary that forms the beam-line exit. An integrated computer program recognizes the cells and locates them one by one over the microbeam exit for irradiation. We present technical details of the CAS-LIBB microbeam facility, particularly on the collimator, hardware, control program, as well as cell irradiation protocols available. Various factors contributing to the targeting and positioning precision are discussed along with accuracy measurement results.     

Experimental Study and Numerical Simulation of the Casting-Forging Complex Near Net Forming of Alternator Claw-pole

As a newly developed precision technology, casting-forging complex near net forming process is utilized to produce complex components with a short lead time, low cost and high precision, thus to accelerate the response speed of the market and enhance the competitive power of products. In this paper, the casting-forging complex near net forming process of alternator claw pole was developed and investigated with a combination of experimental and numerical simulation method. Qualified near net workpiece was manufactured, mechanical parameter and relative field information during the forming process was also obtained. While the alternator claw-pole is processed with this technology, the forming force is small, the process is short and the quality of forgings is perfect. Therefore, the complex casting-forging near net forming process of claw-pole is an energy and material saving technology, which will have a vast developing and application prospect in the future.     

浅谈中国企业战略问题

中国企业陷入无战略危机的原因是脱离中国企业的现实环境,一味借用并参照西方主流的战略理论来看待自身的战略实践,中国企业已进入开放下的全面竞争阶段,应当适时的形成扎实的系统管理能力,养成战略导向思维,与中国企业的现实环境相匹配,实施灵活的战略和战略管理过程。     

安宁河流域石榴优质丰产的栽培管理技术措施

根据安宁河流域自然地理条件,笔者提出了该地区应发展的几种石榴优良品种,并详细论述了石榴栽培管理中水肥管理、整形修剪、病虫防治技术。     

野燕麦花粉的人工萌发研究

花粉寿命通常较短,一般为几分钟到几个小时,这样就影响采集花粉和授精的机械化过程,降低劳动生产率.实验通过对野燕麦花粉的贮藏条件和萌发进行研究,从而解决了上述问题.     

WATER-BASED BINDERS USED IN PROCESS FORMAKING AUTOMOBLE FILTER PAPER

INTRODUTIONThe paper used as the filtration medium for automotbile filters has been traditionally treated with alcohol solution of phenolic resins. This has been done to improve the paper's strength properties and allow it to be pleated in an accordion-like shape and to hold the shape when the paper composite is cured.[1]With the onset of greater concern for environmental quality, the filter manufactures have requested paper suppliers to provide a free or lower formaldehyde-containing impr…     

RESEARCH ON REUSE OF PAPERMAKING LIGNIN-CONVERSION OF LIGNIN TO BTX BY CATALYTIC PYROLYSIS IN A POWDER PARTICLE FLUIDIZED BED

INTRODUCTIONPlant consists essentially of three main polymers:lignin, cellulose, and hemicellulose, which are themost abundant and renewable hydrocarbon resourceson the earth. The annual yield of rice straw, wheatstraw, bagasse, reed, and bamboo in our country hasexceeded 1 billion tons. 30% of the yield of ricestraw and wheat straw are used for papermaking, which occupy 70-80% of the raw material. However, it is the difficulty in papermaking waste liquid treatment as well as the lack of c…     

Leaching Mechanism of Complicated Antimony-Lead Concentrate and Sulfur Formation in Slurry Electrolysis

Anodic reaction mechanism of complicated antimony-lead concentrate in slurry electrolysis was investigated by the anodic polarization curves determined under various conditions. The main reactions on the anode are the oxidations of FeCln^(2-n) . Though the oxidation of jamesonite particle on the anode can occur during the whole process, it is less. With the help of mineralogy studies and relevant tests, the leaching reaction mechanism of jameson[to and gudmundite during slurry electrolysis was ascertained. Because of the oxidation reaction of FeCl3 produced by antimony-lead concentrate itself, the non-oxidation complex acid dissolution of jameson[re, the oxidation complex acid dissolution of gudmundite, and the oxidation of air carried by stirring, the leaching ratio of antimony reaches about 35% when HCl-NH4Cl solution is used to leach antimony-lead concentrate directly. So when the theoretical electric quantity is given to oxidation of antimony in slurry electrolysis, all of antimony, lead and iron containing in antimony-lead concentrate, are leached. The formation of sulfur is through the directly redox reaction of Fe^3 and jameson[re. The S^2- in jamesonite is oxidized into S^0 , and forms the crystals of sulfur again on the spot. The redox reaction of Fe^3 and H2S formed by non-oxidative acid dissolution of jamesonite is less.     

基于认证和加密技术的安全多媒体传输方案

本文提出一种安全可靠的多媒体传输方案 ,将多媒体编码过程与认证过程相结合 ,信道编码过程与加密过程相结合 ,既实现了对多媒体敏感区域的认证功能 ,又实现了对整个数据流的加密保护 .其中 ,认证过程对敏感数据进行数字签名 ,并将此签名嵌入敏感区域 ,它可以检测出恶意篡改或传输错误 ;信道编码加密过程是将纠错编码与混沌流密码相结合 ,同时具有纠错功能和加密功能 .理论分析可见 ,认证和加密过程都与编码过程相结合 ,计算复杂度低 ,而且保持了信道编码的容错能力 .实验结果表明 ,此方案具有较高的安全性 ,适合多媒体数据的安全传输 .