Design and Implementation of Mining Administration System for Urumqi Land and Resources Bureau

乌鲁木齐市矿政管理系统是以计算机硬件与网络通信平台为依托，以政策、法规、规范、标准、信息化机构以及安全体系为保障，以矿政管理各类数据库为枢纽，通过业务搭建与建模平台、基础运行平台和数据中心管理平台为支撑构建的矿政管理系统。在系统功能模型设计时，为使系统结构合理，层次清晰，并具有较强的开放性和可伸缩性，将系统划分为若干既相对独立又相互协调、可共享信息的子模块。这些子模块再依据一定的通讯规则和集成模式完成各自独立的功能，同时能够有机的集成在一起，服务于整个系统的信息处理目标。系统业务管理采用B/S结构，矿政数据库管理采用C/S结构，业务管理员可以通过浏览器访问登陆矿政管理系统进行业务管理操作。 ...With the speeding up of industrialization in our country, the utilization of mineral resources has made great contributions to economic construction. With the speeding up of industrialization process in China, predictably, demand for mineral resources will grows bigger than ever, which requires mine administration management department be more creative in administration management. Informatization...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223036

The Construction of a Vector for Endosperm-specific Expression of IPT Gene and It's Transformation in Rice

为研究细胞分裂素在水稻籽粒发育中的作用,构建了P1300-P Pg-5α-IPT-nOS植物表达载体,并对水稻进行遗传转化。以水稻品种9311为材料,采用PCr法获得种子中特异表达的Pg-5α基因启动子,并将此启动子与P1300相连接,构建P1300-P Pg-5α载体,用nCOⅠ和SPEⅠ双酶切P Sg516,获得IPT-nOS核酸片段,然后将此核酸片段插入到P1300-P Pg-5α中,构建P1300-P Pg-5α-IPT-nOS植物表达载体。以水稻品种日本晴愈伤组织为材料,采用农杆菌介导的方法进行遗传转化。成功构建了植物表达载体P1300-P Pg-5α-IPT-nOS,获得了阳性率为81.3%转IPT基因群体。获得转基因株系后,将为进一步筛选高效表达株系及观察其籽粒生长发育过程提供基础。In order to specifically express IPT gene in the endosperm of developing rice seed,the binary vector p1300-p PG-5α-IPT-Nos was constructed,firstly,the promoter of PG-5α was obtained by PCR amplification from rice genomic DNA( variety: 9311) and p1300-p PG-5α was constructed by inserting p PG-5α into p1300,then the IPT-Nos fragment was obtained by cutting p SG516 with Nco Ⅰ and Spe Ⅰ.After IPT-Nos inserted into p1300-p PG-5α,p1300-p PG-5α-IPT-Nos was constructed.p PG-5α-IPT-Nos was transformated into Oryza sativa( subsp.japonicacv.Nipponbare) cells by agrobacterium mediated method and regenerative seedlings were obtained.The results of PCR showed that about 81.3% seedlings were positive.唐山师范学院博士基金项目(09A01); 农业部“948”项目(2011-G1(3)-07); 河北省科技计划项目(13396401D

An efficient path planning algorithm for mobile robot using improved potential field

Traditional APF-based mobile robot path planning approaches posses an inherent problem which is the formation of local minimum that probably prevent robot from arriving at the target. In view of those considerations, an improved potential field function is proposed to settle this problem. The new method includes an improved attractive potential function and an improved repulsive potential function. The attractive potential function takes into account the minimum separation between robot and obstacles, while the repulsive potential function takes into account the relative position between robot and the target. As a result, the target is ensured as the global minimum in working space. Simulation experiments are performed and the results demonstrate the effectiveness of the improved method. &copy; 2009 IEEE.</p

旅游诱导下乡村能源消费模式转型与综合效益评估——六盘山旅游扶贫试验区的案例实证

乡村旅游已成为推动中国乡村转型和促进能源消费模式转变的重要动力之一。论文以六盘山国家旅游扶贫试验区为案例,研究了旅游扶贫工程实施后农户家庭能源消费模式转型及其效益变化。结果表明:在农户家庭能源消费由生活-生产系统向生活-旅游系统的转变过程中,能源利用综合效益显著提升,在促进区域社会经济发展和生态环境改善中发挥着重大的作用。相对于传统农户,乡村旅游农户单位能源产出的经济效益(4.53元/kgce)提高2.86倍,同时实现了生态效益0.11元/kgce和社会效益1.09元/kgce的显著提升。研究也发现,有鉴于乡村旅游能源消费在乡村具有广泛的示范性,这种基于大量商品能源输入的能源消费模式不应是乡村能源消费和旅游业发展所应倡导的,也有悖于国家农村能源政策导向。因此,在乡村旅游发展中,应在充分利用当地既有能源基础上,进一步挖掘生物质能(主要是沼气)和太阳能的潜力,建立以新型能源为主体、传统生物质能和商品能源为辅的能源消费模式

基于改进RRT算法在ROS中的机械臂避障运动规划研究

针对基于目标偏向的RRT算法在复杂环境下易陷入局部搜索与搜索效率低的不足，在ROS中分别基于Dobot模型和DIY模型，对算法做出进一步的改进。在创建机械臂模型基础上，利用MoveIt!对其进行配置，并通过简化模型来提高碰撞检测效率；在基于目标偏向RRT算法的基础上，分别引入扩展目标变更策略和可变步长对算法进行改进；在ROS中分别进行了不同形态障碍物环境下的避障运动规划仿真；在样机上进行了避障和避障抓取实验。仿真及实验结果表明，提出的改进RRT算法相比基于目标偏向的RRT算法，规划成功率和效率分别可提高42.9%和29.2%

基于遗传算法的混合动力客车驱动模式切换优化

混合动力客车城市公交客车因其具有两个动力源参与驱动,使得驱动模式的切换控制成为了整车控制策略的核心,不仅影响整车的燃油经济性和排放性,更是影响了整车的驾驶舒适性。应用高级模拟分析软件AVL CRUISE,联合Matlab/Simulink,搭建整车动态仿真模型。基于换挡规律的思想,调整驱动模式切换时的限值,使得整车驱动模式能够流畅切换。运用遗传算法,以等效百公里油耗量为目标,针对欧洲和中国的城市公交循环工况对影响驱动模式切换的控制参数进行优化,进一步改善了整车的燃油经济性能