可调节正交性的代数网格生成方法研究

随着计算流体力学（CFD）的迅速发展，对作为CFD关键技术之一的网络生成技术提出了更高的要求，传统的网络生成方法一般耗费机时较多且复杂难用，或者生成的网格正交性较差。笔者在传统方法的基础上，提出了一种结合分块网格技术的多方向混合插值网格生成方法，其中插值系数对各块子区域网格的正交性具有可调节作用，能够处理各种复杂边界，生成的网格正交性好，适用范围较广，耗费机时也相对较少，大量的计算实例证明了新方法在网格正交性、适用性等方面都具有优势。     

Phylogenetic distribution of fungal mycosporines within the Pucciniomycotina (Basidiomycota)

The synthesis of the UV Absorbing compounds named mycosporines (MYCs) has been detected in a few basidiomycetous yeast groups. Conspicuous accumulation of mycosporine-glutaminol-glucoside (MGG) in yeasts requires photo-induction and its photoprotective function has been postulated. The distribution of the ability to produce MYCs appeared to be related to the yeast taxonomic affiliation. In view of the potential significance of MYCs in yeast taxonomy, we here studied the distribution of this trait among dimorphic basidiomycetes of the Pucciniomycotina. Of the 94 fungal species (377 strains and 33 genera) tested, almost half were MYC-positive and MGG was the main compound produced. MGG synthesis was observed for representatives of five of seven Pucciniomycotina classes, indicating that this trait is widely distributed in this group. MGG detection proved useful for the differentiation of species of the polyphyletic genera, such as Rhodotorula and Sporobolomyces, that are phylogenetically separated. MGG quantification and UV tolerance studies in Cystobasidiomycetes supported the idea that the habitat of origin of each strains is important in the level of MGG synthesis and that MYCs have a photoprotective function in yeasts. The taxonomic value of this trait in fungal systematics is discussed.     

符号计算在机器人运动学求解中的应用

用符号计算和析配消元法获得了6R工业机器人逆运动学的通用求解算法。由于经符号计算推导出的运动学解析解不仅求解速度快，而且对于工业机器人具有通用性，故符号计算可大大提高机器人仿真和离线编程系统运动学模块的通用性。     

星载ScanSAR成像处理技术研究

由于天线在不同的子带进行扫描,星载扫描模式不能像条带模式那样,获得连续的方位向相位历史,利用条带模式高精度处理算法（如距离一多普勒算法）处理ScanSAR数据,通过在脉冲扫描间隔中填零,把扫描数据看成中间填零的相干脉冲串序列,等效成条带SAR数据,利用条带模式的处理算法进行成像。针对填零后的数据,数据量大,可以采用基于通用图形处理单元的并行处理技术,加快处理速度。对填零处理形成的栅瓣调制,通过滤波进行消除。这样处理的图像和条带模式的图像具有相同的辐射和几何分布特性,有效抑制扇贝效应带来的影响。对实测星栽ScansAR数据进行成像处理,试验结果表明该方法的有效性。     

不同储藏年限稻谷真菌群落多样性与优势菌属探究

为有效防控储藏稻谷霉变,确保稻谷在储藏期的品质与安全,本研究先后对同一粮库点新入库、储藏1年、储藏2年及储藏3年稻谷样品进行了采集,并对其真菌群落多样性进行了探究.通过Illumina MiSeq序列分析法,探究了不同储藏年限稻谷的真菌群落多样性,优势菌属以及真菌群落随储藏年限增加的演变规律.结果发现新入库储藏稻谷的真...     

广义不确定系统鲁棒稳定性及鲁棒镇定的矩阵不等式方法

考虑广义不确定系统的鲁棒稳定性及鲁棒镇定问题.提出了广义不确定系统'广义二 次稳定'及'广义二次可镇定'的概念,利用矩阵不等式,分别得到了所考虑广义不确定系统广义 二次稳定及广义二次可镇定的充要条件,而且,使广义不确定系统鲁棒镇定的状态反馈控制律 的设计可通过求解一给定的矩阵不等式而得到.     

Biodeterioration potentials of microorganisms isolated from car engine lubricating oil

Biodeterioration potentials of bacteria isolated from used car engine lubricating oil were examined using both used and unused oils as substrate. Used oil served as a better substrate for growth of the bacteria than unused oil. The bacterial isolates were identified as Bacillus, Corynebacterium, Actinomyces, Micrococcus, Serratia, Citrobacter, Edwardsiella, Pseudomonas, Nocardia and Acinetobacter species. Fungal genera isolated from the oil were Cladosporium, Aspergillus, Cephalosporium, Mucor, Monosporium, Penicillium and the yeast Saccharomyces. Incubation of the bacteria at different temperatures for 48 hours showed that 100% grew at 30°C, 56% grew at 45°C, 44% grew at 55°C, 31% grew at 60°C while 25% grew at 70°C and survived at 80°C. These results indicate that lubricating oil in service is more prone to biodeterioration than unused oil.     

一种抗高温聚合物凝胶类堵剂ZAY的研制和室内评价

当前研制的堵剂的种类已经很多,但是十分有效的抗高温类的堵剂还是比较少的,也一直是近期技术攻关的重点。基于这点,在抗高温聚合物凝胶类堵剂方面应用常规实验方法做了一些室内试验,室内评价证明堵剂能在中高温(91℃)情况下顺利地进行调剖堵水,而且效果很好。塔里木油田DH1-5-6井开采初期主要靠注水采油,近期由于含水急剧上升导致产量急剧下降,日产油由200t降到67t。在注入堵剂ZAY以后,产量明显升高,日产油提高13%左右。     

清江梯级水电厂AGC的工程实现

基于梯级水电厂的优化运行原则，综合考虑避免机组频繁启停、厂间联 合躲避振动区等因素，较为详细地分析了清江梯级水电厂自动发电控制(AGC)实现过程中必 须考虑 的工程化因素，提出了一种实用的梯级水电厂AGC优化运行算法，包括机组开停机和厂间负 荷分配算法。在此基础上设计的AGC软件已成功地应用到清江梯级水电厂中。