一种自适应人工蜂群算法求解U型顺序相依拆卸线平衡问题

产品拆卸过程中零部件之间会相互干扰影响任务作业时间,基于该情形构建了多目标U型SDDLBP优化模型,并提出一种自适应ABC算法。所提算法设计了自适应动态邻域搜索方法,以提高局部开发能力;采用了轮盘赌与锦标赛法结合的分段选择法,以有效评价并选择蜜源进行深度开发;建立了基于当前最优解的变异操作,以提高全局探索能力快速跳出局部最优。最后,通过算例测试和实例分析验证算法的高效性。     

脉冲电场测试中的激光供电技术

为解决脉冲电场测试系统中的供电问题，设计了一套激光光纤供电系统，该系统由激光器、多模光纤及光电池构成。重点研究了激光器与光纤的耦合问题，设计了透镜系统对激光器输出光束进行准直和压缩。通过MOCVD法研制了GaAs光电池，并制作了椭球形"光伏眼"来提高光电转换效率。仿真和实验表明:采用透镜耦合时，激光器与光纤的耦合效率可达80%以上，远远高于直接耦合时的16%，改进后的"光伏眼"耦合效率相比直接耦合时提高了54.5%，激光供电系统的转化效率在40%以上。该系统的研制为解决脉冲电场的供电问题提供了一种方案。     

Neural network modeling of hydrological systems: A review of implementation techniques

This paper presents a review of procedural steps and implementation techniques used in the development of artificial intelligence models, generally referred to as artificial neural networks (ANNs), within the water resources domain. It focusses on identifying different areas wherein ANNs have found application thereby elucidating its advantages and disadvantages as well as various challenges encountered in its use. Results from this review provide useful insights into how the performance of ANNs can be improved and potential areas of application that are yet to be explored in hydrological modeling. Recommendations for Resource Managers

• Development of integrated and hybrid artificial intelligent tools is critical to achieving improved forecasts in hydrological modeling studies.

• Further research into comprehending the internal mechanisms of neural networks is required to obtain a practical meaning of each network component deployed to solve real‐world problems.

• More robust optimization techniques and tools like differential evolution, particle swarm optimization and deep neural nets, are yet to be fully explored in the water resources analysis, and should be given more attention to enhance neural networks aptitude for modeling complex and nonlinear hydrological processes.

     

High‐efficiency polymer solar cells based on phenylenevinylene copolymer with BF2‐azopyrrole complex and CN‐PC70BM with solvent additive

Power conversion efficiency (PCE) of phenylenevinylene‐based copolymer with BF₂ azopyrrole complex (PB)/modified PC₇₀BM, that is, CN‐PC₇₀BM bulk heterojunction solar cells improves from 2.16 to 4.90% using a processing additive and drying condition. The results demonstrate that a processing additive and drying condition provides an effective means to control both the surface roughness and finer interpenetrating networks to enhance the exciton dissociation into free charge carriers, charge transportation, and collection. Taking into the account of simple device fabrication process without thermal annealing, the PCE of the polymer solar cell can further improved by chloronapthalene (CN) additive under the fast drying condition. The average carrier lifetimes extracted from the impedance spectra and found to correlate with measured PCEs. At short circuit conditions and illumination, the average charge carrier lifetime was found vary from 16.8 to 32 μs with power conversion efficiencies ranging from 3.0 to 4.9%. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012     

Syntheses,characterizations and bioactivities on HeLa cells and KB cells of two dinuclear manganese complexes with carboxylate bridges

To explore anti-tumor activities of manganese complexes, two complexes have been synthesized and characterized. Complex 1 is bridged by 1,10-phenanthroline and 2,4-biphenyl dicarboxylate. The two complexes have strong fluorescent emission and interact with DNA in an intercalative mode. The complexes also exhibit significant cytotoxic specificity and cancer cell inhibition.     

Effects of aqueous extracts from the stems and leaves of Trifolium pratense cv. Minshan on germination and seedling growth of three crops

以岷山红三叶（Trifolium pratense cv.Minshan）的茎、叶为供体植物,用蒸馏水浸泡48h制备水浸液。设0.05、0.10、0.15和0.20g·mL^-1 4个浓度梯度,以蒸馏水为对照,对燕麦（Avena sativa）、小白菜（Brassicachinensis）、披碱草（Elymus dahuricus）3种受体植物种子进行发芽试验和幼苗生长的生物测定。结果表明,不同浓度岷山红三叶茎叶水浸液对不同受体植物种子萌发和幼苗的生长发育有不同的化感效应。各浓度水浸液对种子萌发均没有显著影响（P〉0.05）,但对小白菜幼苗的生长均有显著的抑制作用（P〈0.05）;0.20g.mL-1浓度的水浸液对燕麦、披碱草和小白菜根生长抑制率分别为23.76%、35.73%和62.50%,且抑制作用显著;0.05g.mL-1浓度水浸液对披碱草幼芽的生长促进作用显著;在3种受体植物中,小白菜受到抑制作用较强,燕麦和披碱草则较弱。