“荆楚安澜”现代水网建设思路与实施路径

从天然河湖水系和人工水利设施两方面分析了“荆楚安澜”现代水网的建设基础,多角度剖析了“荆楚安澜”现代水网建设的重要意义,详细阐述了“荆楚安澜”现代水网的建设思路、目标定位和总体布局,提出推进湖北水网三大功能间、不同行业领域间、不同层级水网间以及相邻水网间的协同融合,开展“荆楚安澜”现代水网建设的主要任务和重大工程及行动,以期通过现代水网建设,为湖北省高质量发展提供坚实的水安全保障。     

基于STM32的植物补光调控系统设计

光照是植物生长和发育的重要环境因子之一,在植物组织培养过程中,为了更好地利用LED光源对组培室内植物进行补光,节约能源和提高补光效率,设计了一种基于STM32的植物补光调控系统;系统采用STM32作为微控制器,设计植物补光总控中心和补光调控节点电路,补光总控中心通过RS485通信模块与安装在组培室内的多个补光调控节点进行指令和数据的通信,补光调控节点根据补光总控中心的任务指令和补光参数,协调补光调控节点的各个电路模块之间相互工作,实现按时、按量对组培室内的植物进行补光;经过实验测试结果表明,该系统环保、易操作且性能稳定可靠,能够实现补光的同时节约能源,进而减少了组培室的育苗成本,为在植物组培室内实现植物的补光提供参考。     

A customised approach to determining the geomorphic effectiveness of small flood events in a regulated river

The construction of dams significantly alters flow and sediment regimes with subsequent deleterious effects on the morphological and ecological character of rivers. Effective experimental floods can ameliorate the downstream geomorphic impacts of dams. The traditional view is that large floods are required to perform effective geomorphic work, and the geomorphic outcomes of small floods are often overlooked. Many river restoration frameworks do not consider small floods. Yet, there is evidence that the hydrological characteristics that ameliorate specific geomorphic impacts in a river are unique to each river, and a customised approach to setting the right mix of floods (including small experimental floods) is needed. In this study, we modify an existing flood effectiveness model developed for large floods, for determining the geomorphic effectiveness of small floods in a highly regulated Australian river. Two flood classes were added to the model (medium peak stream power and moderate total energy expenditure), and the flood power characteristics were rescaled to reflect the relative difference in the magnitude of the small floods and the magnitude of the geomorphic work performed. Using a step‐wise approach, this customised model determined the geomorphic effectiveness of small floods. The best flood for ameliorating the geomorphic impacts of flow regulation had medium to long duration (10 to 51 days), high peak unit stream power (77 to 123 Wm^?2) and moderate to large total energy expenditure (78,600 to 342,320 × 10³ J). This approach to determining flood effectiveness for small floods is applicable to other geomorphically impacted river channels downstream of dams and can be used to inform experimental flood releases for geomorphic outcomes.     

双变量变频器双侧供电闭环调速系统的研究

针对异步电机定子变频在解决高压电机调速时,对输出电压的等级要求高,对调速技术要求不足,在原有仅采用控制触发增量方法的基础上加入了闭环控制。在Matlab/Simulink仿真软件中,通过在仿真模型中引入S函数,建立了定转子分段变频有级调压闭环调速系统的仿真模型,并以双变量变频器为基础设计了实验电路,编写了实验程序,从仿真和实验两个方面对定转子调速系统的性能进行分析研究。得出双变量交交变频器在绕线式异步电动机转子侧供电实现调速时具有一定的可行性。     

A composite particle swarm algorithm for global optimization of multimodal functions

During the last decade, many variants of the original particle swarm optimization （PSO） algorithm have been proposed for global numerical optimization, hut they usually face many challenges such as low solution quality and slow convergence speed on multimodal function optimization. A composite particle swarm optimization （CPSO） for solving these difficulties is presented, in which a novel learning strategy plus an assisted search mechanism framework is used. Instead of simple learning strategy of the original PSO, the proposed CPSO combines one particle＇s historical best information and the global best information into one learning exemplar to guide the particle movement. The proposed learning strategy can reserve the original search information and lead to faster convergence speed. The proposed assisted search mechanism is designed to look for the global optimum. Search direction of particles can be greatly changed by this mechanism so that the algorithm has a large chance to escape from local optima. In order to make the assisted search mechanism more efficient and the algorithm more reliable, the executive probability of the assisted search mechanism is adjusted by the feedback of the improvement degree of optimal value after each iteration. According to the result of numerical experiments on multimodal benchmark functions such as Schwefel, Rastrigin, Ackley and Griewank both with and without coordinate rotation, the proposed CPSO offers faster convergence speed, higher quality solution and stronger robustness than other variants of PSO.     

市场机制下建筑节能相关利益主体博弈研究

充分发挥市场机制对节能产品的调控作用是市场经济的基本内容。通过对建筑节能市场发展中存在的相关问题研究,发现我国建筑节能市场的外部性和信息不对称性是产生问题的根源。全面分析建筑节能市场中政府、开发商、消费者以及其他服务组织等利益主体对市场培育的核心作用,通过构建政府与开发商、开发商与消费者之间的动态博弈模型,研究相关利益主体进一步完善建筑节能市场应采取的对策。     

黄河小浪底调水调沙试验数学建模简

黄河小浪底调水调沙是治黄管理的重要措施。通过对实测流量和排沙量变化过程的分析,依据插值和拟合数学理论,结合matlab得到排沙量与时间、流量的函数关系式,并进行数值分析验证,对调水调沙试验的效果进行了理论分析。     

冷热源空间位置对水系统循环的影响

通过供暖水系统和空调冷热水系统的实例计算,将重力循环压力、冷热源在系统中的位置及系统的质调节与量调节结合在一起进行分析.结果表明,冷热源的空间位置影响重力循环的形成和水循环方向;在系统质、量调节运行中,因冷热源的空间位置的不同,重力循环压力对管网系统垂直失调产生较大影响.     

基于BP神经网络的模糊PID风量控制

针对煤矿主风机通风系统多变量、非线性、时变滞后性等问题,提出一种基于BP神经网络的模糊PID算法。该算法综合神经网络、模糊控制与PID调节的各自优点,既具有神经网络的自学习和自适应能力,又具有模糊控制的非线性控制作用,同时兼备PID调节的广泛性。仿真结果表明,该算法的响应速度、稳态精度均优于传统的PID调节,取得比较理想的控制效果。     

促进新能源消纳的省间、省内两级电力现货市场运行机制

随着中国新能源装机容量的快速增长,消纳任务愈发艰巨.电力市场建设也需要结合电网发展特点,寻找高比例新能源背景下的市场模式.文中在分析西北区域现行两级调峰辅助服务市场运行机制存在问题的基础上,提出了未来区域电网省间、省内两级电力市场协调运行中的关键问题及解决措施,建立了以最大化消纳新能源为目标的市场间优化协调机制,设计的机制可以推动省间、省内多个市场之间的有序衔接,促进电能的优化配置和调峰资源的有效利用.通过某省级电力市场实际运行数据,对所提出的两级市场协调机制进行了模拟计算和对比分析,结果验证了设计机制的有效性.