飞行冲突网络演化博弈中牵制机制的研究

为有效解决飞行器冲突网络演化博弈模型背叛诱惑值较大合作行为不理想的问题,构建了飞行器冲突场景的有向网络,在此基础上提出了基于总度的牵制机制和基于聚类系数的牵制机制。在构建的有向网络中分别挑选总度和聚类系数大的节点赋予合作策略,在网络演化博弈的规则下自组织学习,为飞行器产生合作(避让)或背叛(不避让)的策略。仿真分析结果表明,提出的两种方法与随机牵制机制和特定牵制机制比较,能够将合作频率维持在较高水平,以较少的控制代价获得更好的飞行冲突解脱结果。

一类随机时滞神经网络的牵制同步

运用Lyapunov函数方法和矩阵不等式理论,一类随机时滞神经网络的牵制同步解的全局渐进稳定性得到分析.在这类问题中,时滞是时变的,随机因素是有界的.相关结论不仅建立了一些容易验证的条件,并且给出了一个方法可以弥补原本不能实现牵制同步的神经网络的缺陷,使各个结点达到同步状态.

论权力制衡的重心

权力本身也需要监督与制约,但应强化制衡机制而不能仅靠“管官的官”。权力监控的重点是其运用效果和行为价值,包括评估滥用或不用形成的负值或者价值差异,并落脚到职位、薪酬等的调整上。横直交错的监督体系和动态调节机制之运行不可不注重观念的跟进。

Wide speed range for traction motor in braking force of electric braking control system

A vehicle stopping method using an electric brake until a traction motor is stopped is studied. At the moment of vehicle stop, electric brake is changed to control mode where torque is reduced at a low speed. Gradient is controlled by estimating the load torque of motor, thereby traction motor is not rotated after stop. In addition, coasting operation and brake test are performed from normal-opposite operation and start using a small-scale model comprising the inertial load equipment and the power converter. Further, traction motor is made to be equipped with a suspension torque. Pure electric braking that makes traction motor stop by an air brake at the time of stop is also implemented. Constant torque range and constant power range are expanded during braking so that braking force is secured with the electric brakes even in high speed region. Therefore, vehicle reduction effect can be expected by reducing parts related with an air brake which is not used frequently by using a pure electric brake in the M car in wide speed region. Further, maintenance of brake system can be reduced. Besides, ride comfort of passenger in the electric rail car, energy efficiency improvement, and noise reduction effect can be additionally expected. Further, an improved brake method that uses only an electric brake till motor stop is proposed by comparing those in the blending brake that uses an air brake while reducing brake torque at vehicle stop.

肺炎克雷伯菌多药耐药株的耐药机制研究

目的调查1株多药耐药肺炎克雷伯菌（MDRKP）58种耐药相关基因与可移动遗传元件的存在情况。方法对分离自我国内地的1株MDRKP,采用聚合酶链反应（PCR）及序列分析的方法分析58种β-内酰胺类、氨基糖苷类、喹诺酮类和其他广谱抗菌药物耐药相关基因与可移动遗传元件。结果该株MDRKP检出TEM-1、SHV-11（均测序比对证实）t、etA、mdfAt、rbCt、np513I、SEcp1基因,且gyrA基因存在突变,其余50种基因未检出。结论该菌株耐Ⅰ~Ⅲ代头孢菌素抗菌药物,可能与同时产TEM-1型和SHV-11型β-内酰胺酶引起牵制耐药机制有关,该株MDRKP表型为多药耐药与gyrA基因突变及获得可移动遗传元件和多种耐药基因相关,在肺炎克雷伯菌中检出ISEcp1为国内首次报道。

东亚和平的基础

冷战后维持东亚地区和平的因素是多方面的 ,但起主导作用的因素是大国之间非均势格局下的核威慑、东盟集体安全的扩展以及韩国作为美国盟友坚持和平统一的政策。非均势核威慑遏制了大国间的战争。非均势核威慑与东盟的扩展共同维系了东亚大国与中小国家间的和平、东盟内部的和平以及美国与东盟国家的和平。韩国的和平统一政策保持了朝韩和平 ,约束了美国对朝鲜动武。非均势格局下的核威慑是核心要素 ,为东盟的扩展和韩国和平统一政策发挥作用提供了基础。如果这三个要素保持不变 ,东亚和平将有望再持续较长时期。