《中国近现代史纲要》教改初探

《中国近现代史纲要》课教学改革以发挥学生主体地位,培养学生思想政治能力为主题,通过互动教学,角色扮演,现代化教学手段的应用等方式,实现历史教育与思想政治教育的统一。     

Distribution of trust model in P2P network based on equilibrium theory

There are a large number of malicious attack nodes and collusion groups in P2P(peer to peer) network, and the existing trust models improve the P2P network environment to some extent, but the emphasis of the models are different, which are unable to fully solve large-scale malicious attacks and deception. Therefore, a P2P trust model based on equilibrium theory is presented. The model consists of the construction of the trust structure, the malicious node detection and trust speculation. It constructs trust network according to the equilibrium theory, uses the equilibrium theory to define nodes balance factor, detects balance malicious nodes by calculating the impact of malicious behavior on the network, and adopts trust inference algorithm to estimate trust nodes to prevent distrust network nodes being added. Experimental results show that the model is reliable, and the algorithm is efficient and robust.     

水杨酸对梨树叶片光氧化胁迫的缓解效应

以甲基紫精(MV)500 μmo1·L-1在1 150μmol·m-2·s-1左右光强下处理梨树叶片,研究了水杨酸(SA)对梨树叶片光氧化胁迫的缓解效应.结果表明,光氧化胁迫导致梨树叶片光合效率下降,丙二醛(MDA)积累,并导致超氧化物歧化酶(SOD)活性降低.光氧化胁迫条件下,SA可提高叶片的光合速率,减少膜脂过氧化产物MDA的积累,提高叶片中SOD的活性并降低叶片质膜透性,减轻光氧化胁迫对细胞膜的伤害.表明水杨酸可以缓解光氧化胁迫对梨树叶片的伤害作用,且在所试浓度范围内,以300μmol·L-1的SA作用效果最好.     

基于小波分解的多模态图像配准方法研究

在小波分解的基础上,采用最大互信息(MMI)配准测度和POWELL优化算法对多模态图像配准,多分辨率配准方法具有可以有效地避免优化算子陷入局部极值、算子收敛速度快和配准精度高等优点。CT/MRI和CT/PET图像配准结果证明基于小波分解的多模态配准方法的有效性。     

Learning the BN Structure Based on the Sum of Mutual Information

The Crossing Entropy is defined to scale the similar level of two probability distribution. In many papers on learning BN structure,the Crossing Entropy was used as an indicator of measuring the learning accuracy of an algorithm.The known scoring metrics for learning BN structure is analyzed in this paper,then a new scoring metrics Sum of Mutual Information is proposed based on the information theory.At last,two algorithm for learning BN structure by SIM is represented.     

构建农村法律援助体系的难点与对策

民主法制建设是建设社会主义新农村的重要内容之一,法律援助在农村民主法制建设中占有突出地位。针对农村法律援助面临人员缺乏、经费不足等问题,提出了采取加强人才队伍建设和拓宽经费筹措渠道等措施。     

大红犀猎蝽对草地贪夜蛾3龄幼虫捕食功能反应

为探明天敌昆虫大红犀猎蝽Sycanus falleni对草地贪夜蛾Spodoptera frugiperda幼虫的捕食潜力,在室内条件下测定大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫的捕食功能反应、搜寻效应,以及不同自身密度对捕食草地贪夜蛾的干扰反应。结果表明:大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫的捕食功能反应符合Holling II模型;其中大红犀猎蝽3龄若虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为4.049头、1.198和0.247 d;大红犀猎蝽雌成虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为47.619头、0.717和0.021 d;大红犀猎蝽雄成虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为43.478头、0.650和0.023 d;大红犀猎蝽的捕食量与害虫密度正相关,搜寻效应与害虫密度负相关。大红犀猎蝽自身密度对捕食作用的干扰效应符合Hassell模型,对草地贪夜蛾3龄幼虫的捕食作用率随自身密度的增加而降低。表明大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫均有一定的捕食能力,大红犀猎蝽成虫的捕食作用大于3龄若虫。     

Optimization of Spray Drying Processing Technology of Mulberry Powder

With concentrated juice of mulberry as raw material, the influence of type and dosage of dry aid, the inlet air temperature, inlet flow rate, and rotating speed on spray drying was studied. The spray drying processing conditions of mulberry powder were optimized by the L9(34) orthogonal test on the basis of single factor experiment. The results showed that optimum technical parameters to produce mulberry powder were: β-cyclodextrin as dry aids with dosage of 30%, inlet air temperature of180 ℃, rotating speed of 18 000 r/min and inlet flow rate of 30 m L/min. The mulberry powder under this optimum process conditions had a loose structure and bright color, fruity flavor was rich, the anthocyanin content for 54.67 mg/g, moisture content for5.6% and sensory scores for 83.     

苏陈镇农村资金互助社发展中存在的问题及对策研究

介绍了江苏省泰州市苏陈镇农村互助社的发展现状,分析了该互助社在发展过程中存在的诸如人才匮乏、资金短缺、法律不健全等问题,并对该互助社未来的发展提出了相应建议。     

不同施氮水平下旱作玉米田土壤呼吸速率与土壤水热关系

为探讨不同施氮量对旱作玉米田土壤呼吸速率的影响,设置0(CK)、80、160、240、320kg·hm-25个氮肥水平,分析不同施氮水平下土壤呼吸速率动态变化及其与土壤温度和土壤含水量间的关系。结果表明:夏玉米生长季土壤呼吸速率呈单峰变化曲线,于播种后52d左右达到最大值,成熟收获时降至最低;土壤呼吸总量(Sr)与施氮量(n)满足关系式Sr=1204.09(/1+e-1.69-0.02n)。土壤温度和土壤水分是影响土壤呼吸速率的主要因素,5cm土壤温度与土壤呼吸速率呈显著正相关,土壤呼吸速率随土壤温度升高呈指数增加,土壤温度可以解释旱作农田土壤呼吸速率季节变化的62.31%～78.66%;土壤水分和温度相互协调共同调控土壤呼吸,两者可以解释旱作玉米田土壤呼吸季节变化的79.63%～85.87%。