Ranking approach of cross-efficiency based on improved TOPSIS technique

The cross-efficiency evaluation method is reviewed which is developed as a date envelopment analysis (DEA) extensive tool.The cross-efficiency evaluation method is utilized to identify the decision making unit (DMU) with the best practice and to rank the DMUs by their respective cross-efficiency scores.The main drawbacks of the cross-efficiency evaluation method when the ultimate average cross-efficiency scores are used to evaluate and rank the DMUs are also pointed out.With the research gap,an improved technique for order preference by similarity to ideal solution (TOPSIS) is introduced to rank the cross-efficiency by eliminating the average assumption.Finally,an empirical example is illustrated to examine the validity of the proposed method.     

IUKF neural network modeling for FOG temperature drift

A novel neural network based on iterated unscented Kalman filter （IUKF） algorithm is established to model and com- pensate for the fiber optic gyro （FOG） bias drift caused by temperature. In the network, FOG temperature and its gradient are set as input and the FOG bias drift is set as the expected output. A 2-5-1 network trained with IUKF algorithm is established. The IUKF algorithm is developed on the basis of the unscented Kalman filter （UKF）. The weight and bias vectors of the hidden layer are set as the state of the UKF and its process and measurement equations are deduced according to the network architecture. To solve the unavoidable estimation deviation of the mean and covariance of the states in the UKF algorithm, iterative computation is introduced into the UKF after the measurement update. While the measure- ment noise R is extended into the state vectors before iteration in order to meet the statistic orthogonality of estimate and mea- surement noise. The IUKF algorithm can provide the optimized estimation for the neural network because of its state expansion and iteration. Temperature rise （-20-20℃） and drop （70-20℃） tests for FOG are carried out in an attemperator. The temperature drift model is built with neural network, and it is trained respectively with BP, UKF and IUKF algorithms. The results prove that the proposed model has higher precision compared with the back- propagation （BP） and UKF network models.     

Electromagnetic behavior of two-dimensional quasi-crystal left-handed materials with dendritic unit

We demonstrated a two-dimensional quasi-crystal dendritic structure model with negative permeability. The microwave transmission and reflection properties of periodic and quasi-crystal dendritic structure mediums with varied angle incidence were measured. The results showed that the resonant peaks of quasi-crystal negative permeability samples and left-handed samples had tiny shift with the altering of incident angle. Because of the influence of coupling between quasi-crystal dendritic cells, the resonance of the entire material was enhanced or weakened. The quasi-crystal dendritic structure model will provide an easy method to design isotropic left-handed materials （LHMs）.     

Efficient generation of multi-photon W states by joint-measurement

We propose an efficient scheme to generate multi-photon entangled W state from two-qubit Einstein-Podolsky-Rosen pairs by measurements and follow-up local transformation. We discuss the efficiency of the scheme under realistic conditions, and its implementation using current technology.     

ZnO/WO_3纳米片薄膜的光电催化性能研究

采用水热法在不锈钢基底上制备WO3纳米片阵列,然后将其浸渍于不同浓度Zn(NO_3)_2溶液中以负载ZnO纳米颗粒,从而制备出ZnO/WO_3纳米片薄膜。采用场发射扫描电镜(FESEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外-可见吸收光谱(UV-Vis)和电化学阻抗图谱(EIS)等方法对ZnO/WO_3复合薄膜的形貌、结构、物相组成和光电性能等进行分析,重点考察了薄膜电极对亚甲基蓝(MB)的光电催化降解性能。结果表明,WO_3纳米片均匀垂直于基底生长,Zn元素以ZnO颗粒的形式分布在WO_3表面;ZnO的引入促进了WO_3中产生的光生电子-空穴对的分离,从而使ZnO/WO_3复合薄膜表现出比纯WO_3薄膜更优异的光电性能和光电催化活性;在Zn(NO_3)_2浸渍液浓度为20mmol/L时,所制ZnO/WO_3复合薄膜具有最佳的光电催化性能,在MB溶液初始浓度为10mg/L、外加偏压为0.8V、光照1h的条件下,采用该样品对MB的降解率达96.5%,并且复合薄膜具有良好的循环稳定性,在重复使用5次后,对MB的光电催化降解效率没有明显降低,有望在实际污水处理中得到应用。     

河南省粮食产量周期波动分析

利用1951--2005年河南省粮食产量统计数据,应用波动理论和周期理论分析河南省粮食产量波动规律,考察河南省粮食产量波动的历史过程和数量特征．结果表明,河南省粮食产量波动具有短周期的显著特征,平均波动周期3.3年左右,波幅较小,扩张期略长于收缩期．     

温肾醒脑方对血管性痴呆大鼠脑组织Nrf2-ARE信号通路的影响

为探讨温肾醒脑方(WXD)对血管性痴呆(vascular dementia,VD)大鼠认知功能的改善作用及对Nrf2-ARE信号通路的影响,将70只雄性SD大鼠随机分成正常组、假手术组、模型组、脑复康组(0.15 g/kg)、温肾醒脑方给药组(高剂量组5 g/kg、中剂量组2.5 g/kg、低剂量组1.25 g/kg),每组10只动物,采用双侧颈总动脉永久性结扎法建立VD模型,给予温肾醒脑方灌胃治疗后,Morris水迷宫测试治疗后VD大鼠认知功能的改善情况,检测脑组织中超氧化物歧化酶(SOD)、丙二醛(MDA)、谷胱甘肽过氧化物酶(GSH-Px)、一氧化氮合酶(NOS),RT-PCR检测大鼠脑组织醌NADH脱氢酶(NQO1)、血红素氧合酶1(HO-1)的mRNA水平,运用Western Blot检测Kelch样环氧氯丙烷相关蛋白-1(Keap1)、核因子E2相关因子2(Nrf2)、NQO1、HO-1蛋白水平的表达情况以及EMSA检测Nrf2与抗氧化反应元件(ARE)结合力。结果表明:与正常组比较,VD模型组大鼠逃避潜伏期明显较长,游泳总距离明显缩短,穿越站台总数明显减少(P0.01);大脑组织中MDA含量显著增加,SOD、GSH-Px和NOS的含量明显减少(P0.01);同时大脑组织中细胞核Nrf2蛋白表达降低、细胞质中Keap1蛋白表达增加,NQO1、HO-1 mRNA和蛋白表达降低(P0.01)。与VD模型组比较,脑复康和温肾醒脑方组大鼠的认知行为得到很大的提高,脑组织MDA、SOD、GSH-Px、NOS含量和脑组织病理结构得到很好的改善,Nrf2、Keap1、NQO1、HO-1在mRNA水平或蛋白水平上有一定程度改变,特别是温肾醒脑方组大鼠的改善非常显著。可见温肾醒脑方可以改善VD大鼠的认知行为,其机制可能与Nrf2-ARE抗氧化应激信号通路相关。     

Recombinant soluble TRAIL induces apoptosis of cancer cells

TRAIL is a tumor necrosis factor family member that selectively induces apoptosis of cancer cells but not of normal cells. To develop TRAIL into a potential cancer drug, three different sizes of soluble TRAIL fragments, including sTRAIL(74—281), sTRAIL(95—281) and sTRAIL(101—281), were expressed in E. coli and purified to homogeneity. Apoptosis assays indicated that sTRAIL(95—281) and sTRAIL(101—281), but not sTRAIL(74—281), can potently induce apoptosis of various cancer cell lines in 6 h, suggesting that the N-terminal fragment of aa101 has inhibitory effect on TRAIL-induced apoptosis. Moreover, we found that some cancer cells were resistant to TRAIL and the resistant cells could be converted into sensitive cells by treatment with the protein synthesis inhibitor cycloheximide, suggesting that one or more short-lived proteins are responsible for cells’ resistance to TRAIL.     

污染稻麦籽实中镉和铅的分布及其存在形态

组织化学及生物化学分析表明：污染稻麦籽实中Ｃｄ和Ｐｂ呈不均－分布,胚中质量量显著高于胚乳,且皮层和颖壳中量也较高,但胚乳中的蓄积总量最多;在籽实主要营养成分中Ｃｄ和Ｐｂ以与蛋白上结合的形态为主,其中与谷蛋白、球蛋白的结合量最多。     

师专公共课与学生能力培养

本研究以文山师专学生11门公共课的成绩为材料,采用因子分析的方法,得出11门公共课主要培养4种共同能力：现代认知能力、综合教育能力、教学基本功、生活适应能力。思想品德修养、普通话口语训练、书法、教育学等课程在师专生共同能力培养中起着较突出的作用。从能力培养的角度看,师专公共课程的设置与现代教育发展的趋势是相呼应的,它在师范生能力培养中的作用是学科专业课不能取代的。要确保师专教学质量,就要充分发挥公共课能力培养的作用。