SOA-based RFID public services infrastructure: architecture and its core services

Radio frequency identification (RFID) has prominent advantages compared with other auto-identification technologies. Combining RFID with network technology, physical object tracking and information sharing can possibly be carried out in an innovative way. Regarding open-loop RFID applications, RFID public services infrastructure (PSI) is presented, PSI architecture is designed, and service modules are implemented, and a demonstrative application system, blood management and traceability system, is studied to verify PSI. Experimental results show the feasibility of the proposed architecture and the usability of PSI framework software.     

冷却塔配水系统布水研究与数学模型的建立

为解决冷却塔配水系统布水不均匀的问题,对冷却塔管式配水系统的构成、特点进行研究,分析各部件及管系的阻力特性,结合Bernoulli方程和Gardel方程,建立配水系统动、静压转换和每个喷头前的配水压力计算公式,实现每个喷头的流量计算.为实现配水均匀,通过控制最大流量喷头与最小流量喷头的流量差,提出冷却塔均匀配水的计算模型.据此可按要求的流量差进行配水系统的设计与计算,为冷却塔实现配水均匀提供了可靠的计算方法,经多个工程实践验证该方法计算结果与工程实际吻合.     

发酵麦秆饲料中蛋白质含量的研究

麦秆因其纤维素含量高,在农村主要用作反刍动物饲料或者制备沼气,而不能充分利用.研究以农田麦秆为原料,通过担子菌酵母发酵,分解麦秆中木质纤维素,以提高发酵物中的蛋白质含量; 用烘干法测定麦秆含水量.结果表明：担子菌酵母繁殖较快,蛋白质含量增加2.4倍; 新鲜麦秆含水量（质量分数）约为70.3%,为麦秆的深度利用提供了有益的尝试.     

氧化锆流延基片的烧结温度及其性能研究

比较了3种不同的烧结温度对氧化锆流延基片性能的影响.结果表明,随着烧结温度的升高,基片的收缩率和相对密度增加、硬度增加、气孔率减小、晶粒和气孔的平均尺寸均有所增加.在1 500 ℃保温3 h可以获得较高的致密度(相对密度97.8%)和合适的晶粒尺寸,试样在1 073 K时离子电导率为1.187×10-2S·cm-1,烧结体物相主要为四方相.     

双频激电法在云南勐板铅锌矿区中的应用

勐板铅锌矿区位于云南西部的保山地块中,该区复杂的地质构造活动为铅、锌等金属矿床的形成奠定了良好的成矿地质基础,但也极大地增加了矿产资源勘查的难度。为进一步探索勐板矿区的矿产资源储备前景,基于岩(矿)石标本物性分析和现场的试验结果,发现该区含矿的岩体可产生明显的激电异常。故在研究区范围内部署多条激电中梯剖面,圈定出9个异常区,综合化探、地质资料成果,确定了5个重点找矿靶区。基于上述工作,在重点异常区布设两条激电对称四极测深剖面,对重点异常体的深部纵向分布和延伸进行探索。以研究矿区横纵向激电响应特征为主,地质、化探成果为辅的综合找矿方法技术组合,可为云南勐板地区及其邻区或类似地区的矿产勘查工作提供一定的借鉴。     

Tribological properties of OTS self-assembled monolayers

Octadecyltrichlorosilane (OTS) self-assembled monolayers (SAMs) were prepared on the substrates of silicon and glass. The tribological properties were tested with a self-made point-contact pure sliding micro tribometer. The effect of humidity on the tribological properties of both OTS SAMs and the naked substrates were studied. When the substrate is covered by OTS monolayer, the friction coefficient is reduced from 0.5 to 0.1 and the stick-slip phenomenon is weakened. OTS monolayer can keep its friction coefficient steady in a wide range of humidity, because it is highly hy-drophobic and thus not sensitive to humidity. In addition, the OTS monolayer has a considerable anti-wear ability.     

Increment of antioxidase activity of transgenic tobacco with betaine aldehyde dehydrogenase

Superoxide dismutase (SOD) activity in the leaves of transgenic tobacco plants with betaine aldehyde dehydrogenase (BADH) gene was about 36% higher than that in the control plants (parent plants), activities of peroxidase (POD) and catalase (Cat) increased by about 62% and 88% respectively. Activities of ascorbate peroxidase (AsSPOD), dehydroascorbate redutase (DAsAR) and glutathione reductase (GR) in ascorbate-glutothion pathway located at chloroplasts increased by 67.7%, 47.9% and 38.8% respectively. These results indicated that the H₂O₂ produced by SOD catalyzing superoxide anion radicals (O^-₂) could be fully decomposed, and could not derive to form the strongest toxicant radicals ·OH. This is the first report to elucidate quantitatively that the activities of two kinds of antioxidative enzymes decomposed radicals and active oxygen were matched. Photoinhibition tolerant capacity of the transgenic tobacco plants was 35% higher than that in the parent plants. Increment of photoinhibition tolerant capacity in the transgenic tobacco plants might be due to increment of antioxidative enzymes activities, in turn being able to more effectively scavenge active oxygen and radicals, protect organization and function of chloroplasts. These results showed that the increment of antioxidative enzymes activities in the transgenic tobacco might be one of the reasons for the increment of resistance in the transgenic tobacco.     

Discovery of Ordovician acritarchs in Buqingshan ophiolite complex, East Kunlun Mountains and its significance

This note reports the first discovery of Middle-Late Ordovician acritarchs from the Buqingshan ophiolite complex of the southern ophiolite zone of East Kunlun. The acritarch assemblage is dominated with acanthomorphids (approx. 32%) and sphaeromorphds (approx. 63%) and contains more characteristic forms, such as Lophosphaeridium edenense, L. varum, Nothooidium sp.,? Buedingiisphaaeridium sp., Visbysphaera sp., Strophomorpha sp., etc. In addition, some tube-like fragments and tetrads, which are recognized as affinity to terrestrial plants and usual occurrence in Late Ordovician-Early Silurian strata, are preserved together with acritarchs. All the known fossil evidence indicates that the strata should be Middle-Late Ordovician in age. It not only provides paleontological proof for the existence of Ordovician ophiolite, but also challenges the usual ideas on strata composition of the studied area and the southern ophiolite zone of East Kunlun, and the models on tectonic framework and evolution of this area and the northern part of the Qinghai-Tibetan Plateau.     

Rate of decay in admixture linkage disequilibrium and its implication in gene mapping

Modeling linkage disequilibria (LD) between genes usually observed in admixed natural populations has been shown an effective approach in high-resolution mapping of disease genes in humans. A prerequisite to obtain accurate estimation of recombination fraction between genes at a marker locus and the disease locus using the approach is a reliable prediction of the proportion of the admixture populations. The present study suggested the use of gene frequencies to predict the estimate of the admixture proportion based on the observation that the gene frequencies are much more stable quantities than the haplotype frequencies over evolution of the population. In this paper, we advanced the theory and methods by which the decay rate of nonlinear term of LD in admixed population may be used to estimate the recombination fraction between the genes. Theoretical analysis and simulation study indicate that, the larger the difference of gene frequencies between parental populations and the more closely the admixture proportion approaches 0.5, the more important the nonlinear term of the LD in the admixed population, and hence the more informative such admixed populations in the high-resolution gene mapping practice.     

数值分类在藓类植物中的应用

根据数值分类学的基本原理,设计了一个实现藓类植物数值分类的算法,通过该算法对33种藓类植物孢子和孢蒴的主要性状进行了计算机数量化分析,根据距离系数验证了它们之间的相似性和区别,并与形态和细胞分类作了比较,从数值分类角度可以说明大帽藓属（Encalypta）、真藓属（Bryum）和金发藓属（Polytrichum）是属级的自然分类群,小金发藓属（Pogonatum）与金发藓属（Polytrichum）是科一级的自然分类群,有2个物种与所在属的其它物种距离系数相差相关稍大,原因有待进一步探讨。