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- 与 genetic 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In this context a genetic algorithm was applied to the four-dimension (4-D) variational data assimilation, which provided a kind of new and effective method in the initial field optimization. The theoretical basis and detailed algorithm were introduced in this paper. At the same time, according to the property of the variational problem itself, we designed the rational genetic coding, operators and parameters.
本文将遗传算法应用于四维变分资料同化问题,提供了一种新的较为有效的NWP初始场优化方法,给出了相应的理论依据和详细算法,并结合变分问题本身的特点,设计了合理的遗传编码、遗传操作和遗传参数。
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Genetic distance data showed that the heriditary conservation among 11of 14 studied cultivars (except Longshan akaryotic wampee, Longchuan akaryotic wampee and white sugar karyotic wampee) was very high (D≤0.1), which suggested that the genetic relationship between theses cultivars was very close.
结果表明,除龙川无核黄皮、龙山无核黄皮和冰糖黄皮外,其它11个品种间的遗传距离较近(D≤0.1),说明大多数黄皮品种遗传差异较小,亲缘关系较近。
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In this article it raises a mathematical model for this problem according to the practical experiences of production, and unifies simulated annealing algorithm with genetic algorithm in view of the model to solve the fast convergence problem and weak partial searching ability problem in genetic algorithm.
根据生产上的实际经验提出了问题的数学模型,针对该模型,将遗传算法和模拟退火算法结合,解决了遗传算法的收敛过快以及局部搜索能力不强的问题。
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Premature convergence and weak local optimization are two key problems existing in the conventional genetic algorithm. To overcome the shortcomings, an improved genetic algorithm based on the particle swarm algorithm is proposed.
针对传统遗传算法中存在的易陷入局部最优解和后期收敛速度慢的问题,基于粒子群算法,对传统遗传算法作了改进,提出了一种基于粒子群算法的遗传算法。
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Compared with the PID parameter optimization method using the genetic algorithm, the proposed method, which inherits the advantages of the genetic algorithm and the simulated annealing algorithm, can overcome some disadvantages such as premature convergence, weak local searching ability and low computing efficiency.
该方法继承了遗传算法和模拟退火算法这两者的优点,与采用常规遗传算法的PID参数整定方法相比较,这种方法在克服解早熟、增强局部寻优能力和提高计算效率等方面都有明显的改进。
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Finally a comparison of optimization results between complex method and genetic algorithm is carried out, which shows the value of objective function ha s decreased 6.6% under GA. This will help decrease the slippage of steering whee l and wear extent of tyre. At the same time, it also verifies the feasibility an d superiority of genetic algorithm in solving the nonlinear optimization problem s with many restraints and variables.
计算结果表明:与复合形法相比,遗传算法使目标函数值减少了6.6%,取得了较好的优化效果,从而更有利于减小转向车轮的滑移量和轮胎的磨损量,同时也验证了遗传算法解决多约束、多变量类型优化问题的可行性和优越性。
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The result showes that The natural population of the wolf spider has abundant genetic diversity and there are difference in the genetic diversity of the population from different geographical regions.
结果表明:拟环纹豹蛛的自然种群具丰富的遗传多样性;不同生境的拟环纹豹蛛种群遗传多样性存在差异;海拔和积温是影响拟环纹豹蛛种群遗传分化的主要因子。
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This paper investigats the genetic diversity of the wolf spider (Pardosa pseudoannulata BSenberget et strand 1906) by using the SRAP reaction system and analyzes the effect which ecological factor carried on genetic diversity.
利用SRAP标记对不同地理区域的拟环纹豹蛛(Pardosa pseudoannulata BSenberg et strand 1906)种群遗传多样性进行研究,分析了不同生态因子对拟环纹豹蛛种群遗传多样性的影响。
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Targeting the biomass rice stalk,we use linestone as catalyst and cracking catalyse the tar which was pyrolysised from the target.We build the rice straw biomass gasification tar removal catalytic cracking process model by the least squares support vector machine model and optimize the model parameters through genetic algorithm.We also has gotten the best catalytic cracking temperature and gas residence time, making the highest rate of catalytic cracking tar.We made wood biomass as a target analysis so that we can thermally crack tar,and we can use genetic algorithms to optimize the model parameters that is based on the wood biomass gasification pyrolysis tar removal process model through the least-squares fitting method,then we got the best pyrolysis temperature and equivalence ratio,so that it is possible to make the tar content reach the minianum.Based on the least squares support vector machine model,we had established the model of the biomass sawdust Compression molding process and fit the Optimization Parameters objective function of the molding process .
以生物质稻秆为对象,采用石灰石作为催化剂对稻秆热解焦油进行催化裂解,由最小二乘支持向量机模型建立了生物质稻秆气化焦油催化裂解脱除过程的模型,并用遗传算法对模型参数进行了优化,得到了最佳的催化裂解温度和气相停留时间,使得焦油催化裂解率达到最高;以生物质木屑作为分析对象,对其进行热裂解脱焦,并依据最小二乘曲线拟合方法建立了生物质木屑气化焦油热裂解脱除过程的模型,用遗传算法对模型参数进行了优化,得到了最佳的热裂解温度和当量比,使得焦油含量达到最小。
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The content of mineral elements in ripe fruits of M.sieversii from 78 seedings at Mohe Town,Gongliu Country were analyzed using Atomic Absorption Spectrophotometer.The results indicated that M.sieversii seedings presented considerable genetic variations in content of mineral elements with the range of variation coefficients from 24.2% to 54.0%.So it has large potential for further selection.Four elite seedlings were selected,namely large fruit type,high Ca content type,high Zn content type and high damascenone content.As the predominant component of Ily wild fruit tree forest,Malus sieversii had occupied an area of 9300ha.But the inherent reproduction system of M.sieversii and genetic diversity of the species were destructed in different degrees,as a result of farming assart,over grazing and damage by Agrilus mali.
上述结果支持&新疆野苹果可能是栽培苹果祖先种&的结论;②对巩留县莫舍乡的新疆野苹果78个实生株系果肉组织Ca、Mg、Fe、Zn、Cu、Mn6种矿质营养元素进行测定的结果表明,每种矿质元素含量单株间差异显著,变异系数在24.2%~54.0%,遗传多样性丰富,进一步选择的潜力很大;③根据新疆野苹果果实形态、香味物质和矿质元素含量等的测定结果,初步筛选出了大果型、高钙型、高锌型和大马酮型等4个特异性状单株;④调查发现,由于农田开垦、过度放牧以及苹果小吉丁虫的蔓延危害,目前伊犁野果林面积逐年减少,野苹果固有的繁育体系和遗传多样性受到不同程度的破坏。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力