A new genetic algorithm based on diffluent mechanism ( dmga ) is put forward . its strategy is that excellent seeds are set limit to reproduce , certified seeds are crossed and bad seeds are mutated . the crossover probability and mutation probability is adjusted by the evolutionary equality 提出一种基于分流机制的新型遗传算法( dmga ) ,该方法采用优种限量繁殖,达标种交叉和劣种变异的策略,交叉和变异概率根据进化质量自适应地调整,使种群具有很强的可进化性。
What ' s more , we put forward some experienced formulas on the basis of the cortical analysis . the result of the research show that by installing diffluent piers with low ridge , we can eliminate the root of oscillatiny water jump , perfect the energy dissipation effect of water jump , also , we can improve the flow condition of down - stream . the fact that the main flow of down - stream is in the middle , not only effectively lower the speed of the bottom flow in the ridge rear , alleviate the erosion to the river bed , but also avoid the heavy wave resulted from the main flow in the surface , thus improve the surface wave of down - stream obviously . we can work out the body style parameters of diffluent piers with low ridge according to the project flow condition and experience formulas , and then reckon the down - stream surface wave condition for the protected building of the down - stream bank 研究结果表明:设置低坎分流墩后,消除了摆动水跃水舌摆动的根源,提高了水跃的消能效果,改善了下游水流流态。下游水体的主流在中部,既有效的降低了坎后水流底流速,减轻水流对河床的冲刷,又避免了主流位于表面导致波浪过大的结果,下游的水面波浪明显得到削减。依据经验公式,可根据工程水流条件设计出低坎分流墩的体型参数,进而估算出下游沿程的水面波浪,为下游岸边的砌护提供依据。
The second aspect is to combine the historical and actual analysis by synthesis and the sale practicality to demonstrate a league - cooperation marketing model , which is developed from assistant - selling model and direct - selling model , keep their advantages and avoiding its shortage , which resolving successfully diffluent problem with people , property and goods in selling process 该模式是在助销及直营模式基础上发展起来的,是一种先进的销售管理模式,结合了二者的优势,避免了二者的局限性,成功解决了公司销售过程中的人、财、物的分流。
The system properties of single - loop system , such as velocity , torque , bifurcated power , transmission efficiency are researched deeply using theoretical analysis and numerical computing , and gives new methods for designing which according to the design parameter a and combine with the system diffluent coefficient q and the ratio of x , p cell transmission . so the theoretical expressions for designing this kind of transmission is established . the design parameter a is put forward as the ratio of confluent power and the input power of single - loop system 通过对单环路系统的运动学和动力学特性、功率流特性、传动效率特性等所进行的理论分析和数值计算,提出了以单环路系统主支路功率大小与输入总功率的比值为关键设计参数的设计新方法,并结合系统的功率分流系数q和各组成单元的传动比,得到了单环路系统的速度、力矩、功率流、传动效率等计算公式,为该种传动类型的设计提供了必要的理论依据。
Current . in order to make diffluent piers with low ridge to be popularized and applied , the surface wave of low fr . current is chosen as the research object . we measure the surface wave elements and the velocity distribution of various diffluent piers scheme by the experiment of physical model . we also analyze the average wave height , the the average value of the square of wave , unit width of the wave ' s energy , the probability density distribution of wave height , and the power chart character , so as to reveal the weakening wave mechanism of the diffluent piers 低fr水流的核心是波浪问题,为了低坎分流墩的推广应用,本研究以低fr水流的表面波浪作为研究对象,通过物理模型试验,对各种分流墩方案消能工的下游水面波浪要素、流速分布进行测试,分析低坎分流墩下游波浪的平均波高、均方根、单宽波能、波高概率密度分布及功率谱特性变化规律,从而揭示了低坎分流墩的削波机理。