R&D and Application On Soft Open CNC Technology

20世纪90年代，随着PC技术的快速发展和广泛普及，开放式数控系统技术开始发展。开放式数控系统具有性能优越、运行稳定、易于开发维护和扩展升级、高程度开放和高柔性的特点，使它一出现不久就成为了研究热点。 开放式数控系统一般有三种实现方式：PC嵌入NC型、NC嵌入PC型和纯软件型。其中，纯软件型开放式数控系统充分利用PC微机丰富的硬件资源，用软件实现绝大部分或全部的数控系统功能，具有最高程度的开放性，是当今开放式数控技术的发展方向。纯软件型开放式数控系统的功能可通过二次开发得以扩展，其性能可通过PC硬件的低成本升级而获得显著提高，在人机交互方面，可利用丰富的PC多媒体资源可以开发出十分友善易用的...Since the 90s of the 20th century, along with the fast development and extensively popularization of PC technology, the Open-Structure CNC system started to develop. The Open-Structure CNC system which has superior and stable performance, is easy to develop, maintain and update. It became hotspot soon as its appearance. There are three general ways to the Open CNC system: NC-based PC-embedded ...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械制造及其自动化学号：20042901

The Application of PC-Based Pure-software Open CNC System-ServoWorks

开放式数控系统是当今数控技术领域的研究重点。本文介绍了一种纯软件开放式数控系统-ServoWorks CNC,并且基于应用实例分析了纯软件开放式数控系统的特点。Open structure is now the key technical in CNC research. This paper introduced a Open-Structure,Pure-software CNC system-ServoWorks,and evaluated the features of Open-Structure,Pure-software CNC based in applications

Enhancement of capacity in applied biometry in East and southern Africa

Biometric skills in developing countries are inadequate to support the changing priorities of agricultural research with the consequence that the quality of research aimed at increasing food security and alleviating poverty is often deficient because it lacks good statistical design" (CTA, 1997). It was on this basis that the workshop was planned, realising that not only do national scientists and statisticians (biometricians) need training in applied biometrics but they also need to be exposed to the range of problems and complexity of agricultural study design necessary for the developing world. Few courses in applied biometrics exist in universities in East and southern Africa. Training in biometrics provided hitherto by overseas institutions has been beneficial, but lecturers do not often have a full appreciation, or practical hands-on experience, of the special features of agricultural research and development in Africa. The subjects of experimental design, statistical analysis, interpretation and presentation of results are still recognised to be among the top priorities for training by national agricultural research system (NARS) scientists participating in collaborative networks co-ordinated by the International Livestock Research Institute (ILRI) and the International Centre for Research in Agroforestry (ICRAF). There is thus a major need to establish strong training programmes in the region itself with links to existing programmes abroad

圆柱坐标机器人在针织圆纬机中的应用

基于机器人与互联网的智能化新时代背景,针对传统针织圆纬机编织过程中断纱必须依靠人工操作接纱而一直无法用机器替代的问题,研发一种用于针织圆纬机的圆柱坐标机器人,以实现智能检测纱疵、自动清纱接纱以及多模态除絮工作。介绍圆柱坐标机器人的基本结构、工作原理、控制系统及应用优势。使用该圆柱坐标机器人可以自动清纱并复接,代替人工接纱操作和除絮步骤,有效降低运营成本,大幅度提高生产效率及织物品质,提升圆纬机智能化程度,推动圆纬机装备行业向智能化技术转型升级,为实现智能工厂、无人车间奠定基础

子宫内膜异位症小鼠腹腔巨噬细胞吞噬功能的变化规律

目的研究子宫内膜异位症发生进程中腹腔巨噬细胞吞噬功能的变化规律。方法构造小鼠子宫内膜异位症模型,用流式细胞术检测造模前后腹腔巨噬细胞吞噬荧光微球数,计算吞噬率和吞噬指数代表巨噬细胞的吞噬能力。结果巨噬细胞吞噬率和吞噬指数分别为:未造模组[(10.1±0.82)%,0.17±0.01]、造模后第1d[(32.78±2.43)%,0.60±0.02]、第2d[(33.82±1.23)%,0.61±0.02]、第3d[(35.93±2.81)%,0.72±0.03]、第4d[(27.92±1.24)%,0.51±0.03]、第5d[(24.34±0.91)%,0.40±0.02]、第6d[(17.91±1.03)%,0.28±0.01]、第9d[(17.56±0.80)%,0.26±0.01]、第12d[(19.42±1.02)%,0.36±0.01]、第15d[(26.78±2.05)%,0.54±0.02]、第18d[(27.46±1.61)%,0.50±0.02]、第21d[(25.99±2.31)%,0.54±0.03]。造模后的小鼠腹腔巨噬细胞吞噬能力均显著高于未造模组,且呈现出三个阶段的改变:第1-5d为第1阶段,第6-12d为第2阶段,第15-21d为第3阶段,第1和第3阶段显著高于第2阶段(P<0.01)。结论子宫内膜异位症小鼠腹腔巨噬细胞的吞噬功能增强,且随时间呈现规律性变化特征,可能与子宫内膜的清除和异位存活有关

Research and implementation of underwater acoustic real-time voice communication prototype based on MELP

根据水声通信的复杂信道特性,对混合激励线性预测语音编码MElP算法和低密度奇偶校验码ldPC的结合进行了研究,设计了基于ArM+dSP的多载波水声实时语音通信样机。经水池实验测试,系统表现出良好的实时性和语音可懂度性能,可分辨出不同说话人的声音。Taking the complexity of the underwater acoustic communication channel characteristics into account,the combination of mixed excited linear prediction(MELP) and low density parity check(LDPC) were studied and a multi-carrier underwater acoustic real-time voice communication prototype based on ARM+DSP was designed.By the expreimental test in pool,the proposed system showed a good real-time and voice intelligibility performance,and could distinguish the voice of different speakers.中央高校基本科研业务费专项资金资助(2010121062

谷氨酸棒杆菌合成生物絮凝剂分批发酵过程的动力学模拟

对谷氨酸棒杆菌生产生物絮凝剂的分批发酵过程进行了动力学研究。以Logistic方程来描述菌体生长过程,并对Gaden生长相关模型进行了修正,加入时间修正因子,建立了产物生成动力学模型,同时还提出了关于葡萄糖和尿素的两个非线性基质消耗动力学模型。利用软件Origin8.0对实验数据进行拟合,结果显示各模型均能较好地描述谷氨酸棒杆菌合成生物絮凝剂的分批发酵过程

日本囊对虾人工诱变子一代遗传变异的RAPD分析

以性腺成熟的日本囊对虾(Marsupenaeus japonicus)作为亲代,进行不同剂量的60Co-γ射线照射.采用RAPD技术对诱变子一代的无节幼体基因组DNA多态性进行了检测.从20个随机寡核苷酸引物共检测177个位点,其中多态位点152个,占85.9%.单个引物获得的标记为6~12个,平均8.85个,分子量在150~2 500 bp之间.遗传相似系数用Ne i的计算方法进行计算,遗传距离则用Lynch的计算方法进行计算.实验数据表明:诱变子代与正常对照组相比,遗传多样性水平较高,诱变产生了较为显著的变异.研究结果证实:在对虾大规模养殖,种质质量严重退化的情况下,人工诱变能够促进基因组更加广泛的变异,为新品种的选育打下坚实的基础;同时证明RAPD技术在检测遗传差异方面具有较高的灵敏度和分辨率

Expression of Fusion Protein of Parathyroid Hormone and Transferrin N-terminal Half-molecule in Pichia pastoris

利用重叠PCR技术将PTH(parathyroidhormone,甲状旁腺激素)基因与TFN(transferrinN_terminalhalf_molecule,转铁蛋白N端半分子)基因在体外融合,融合基因克隆至真核表达载体pPIC9中,转化毕赤酵母GS115。转化子经甲醇诱导后,融合蛋白得到了表达并分泌到发酵上清液中。经SPSepharoseFF阳离子交换层析、PhenylSepharoseFastFlow疏水层析纯化获得了纯度大于95%的PTH_TFN样品。Westernblot分析及腺苷酸环化酶实验证明融合蛋白中的PTH具有与抗PTH抗体结合能力及刺激腺苷酸环化酶的活性,铁饱和实验证明融合蛋白中的TFN和单独的TFN具有相同铁结合能力。因而TFN可望作为PTH的天然运输载体。The fused gene (PTH_TFN) of parathyroid hormone (PTH) gene and transferring N_terminal half_molecule (TFN) gene was amplified by multiple PCR and inserted into pPIC9 vector. The recombinant plasmid pPIC9_PTH_TFN was transformed into Pichia pastoris GS115 by PEG. After methanol induction, the target protein was expressed in fermentation supernatant at high level.The fused protein PTH_TFN with purity being higher than 95% was finally obtained after purification through two_step chromatography : SP Sepharose Fast Flow and Phenyl Sepharose Fast Flow.Western blot analysis and adenylate cyclase assay proved that the fused protein exhibited the bioactivity to stimulate cAMP synthesis and the ability to bind Fe ~3+ in the Fe ~3+ saturation study as the recombinant TFN did indicating that TFN could be used as the transcellar carrier of PTH.国家高技术研究与发展项目基金资助(No.2004AA215172)。~

武夷山自然保护区生物多样性研究 1.小叶黄杨矮曲林物种多样性

本文为武夷山自然保护区生物多样性GEF项目内容之一 ,调查了保护区内不同海拔高度的代表性森林生态系统的物种多样性 .小叶黄杨 (Buxussinicavar .parvifolia)林是中山矮曲林的代表性类型之一 .应用Shannon Wiener多样性指数、Pielou均匀度、Simpson指数和PIE对武夷山小叶黄杨群落高等植物进行了物种多样性研究 .结果表明前两者是较好的多样性指标 ,该群落的Shannon Wiener指数值为 1.80 6 8,Pielou均匀度为 49.6 7% ,Simpson指数值为 2 .9146 ,PIE为 0 .6 5 6 9.群落乔木层与藤本植物的物种多样性较高 ,前者各项指数值分别为 2 .2 312 ,71.16 % ,5 .0 783,0 .80 31;后者各项指数值分别为 1.3371,83.0 8% ,3.5 32 7,0 .716 9