四川杂种小麦生产现状及其选配策略

在杂种小麦应用于生产的认识基础上，经多年的研究，已探索出一条技术路线：对Ｔ型杂种小麦亲本改良的同时采用产量优势最强的“穗数型×重穗型”选配组合，其次是采用“穗数型×中间型”；利用化学杀雄生产杂种小麦；化杀杂种Ｆ２代可应用于生产；同时对杂种小麦的栽培技术进行了探索。这条技术路线不仅使小麦育种程序简明化，而且易于选配强优势组合，充分发挥杂种小麦的产量优势，降低杂交种子成本，提高经济效益，加快杂交小麦应用于生产的步伐。

微课程多媒体素材选配策略

为制作高质量的微课程,如何选择多媒体素材是关键。从文字、声音和视频三方面,对多媒体素材的选择进行了阐述,提出了各自的选配策略。

中国华北地区园林观赏植物资源的多样性与城乡绿化的选配策略

华北地区作为中国的重要地理区域,其园林观赏植物资源丰富多样。本研究针对该地区的园林观赏植物资源进行了系统性的整理和分析,探讨其在城乡绿化中的选配策略。通过研究,我们发现本地化选择、多功能化配置、智能化管理以及参与性设计等策略在绿化中具有显著效果。本土植物不仅适应当地气候,而且能够带来生态、经济和社会的多重效益。同时,结合现代技术和居民参与,可以更好地满足城乡绿化的多元化需求。本研究旨在为华北地区的城乡绿化工作提供科学、合理的参考依据,同时对其他地区也具有一定的借鉴意义。

企业财务战略管理与风险控制策略研究

在当下激烈的市场竞争中,财务战略管理和风险防范工作对企业发展的质量起着重要的影响,财务工作者对于财务工作相关风险的关注度也日益增加。企业通过合理的财务战略管理和风险防范措施,能够更好地应对市场的挑战和变化,降低财务风险带来的损失,提高竞争力,为实现长远目标奠定坚实的基础。因此,企业应当高度重视并积极投入到财务战略管理和风险防范工作中,以确保企业的可持续发展和长期成功。本文在分析财务战略管理内涵、目标和意义的基础上,分析了企业财务战略管理与风险控制存在的问题,并提出提升财务战略管理与风险防范能力的策略,旨在帮助企业建立更加健全和有效的财务战略管理体系,提高对财务风险的控制能力。

Buffer allocation method of serial production lines based on improved ant colony optimization algorithm

Buffer influences the performance of production lines greatly.To solve the buffer allocation problem(BAP) in serial production lines with unreliable machines effectively,an optimization method is proposed based on an improved ant colony optimization(IACO) algorithm.Firstly,a problem domain describing buffer allocation is structured.Then a mathematical programming model is established with an objective of maximizing throughput rate of the production line.On the basis of the descriptions mentioned above,combining with a two-opt strategy and an acceptance probability rule,an IACO algorithm is built to solve the BAP.Finally,the simulation experiments are designed to evaluate the proposed algorithm.The results indicate that the IACO algorithm is valid and practical.

Peak-to-average power ratio reduction using selective mapping with unequal power distribution

A new approach for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems was proposed.This approach is based on assigning powers to the different subcarriers of OFDM using an unequal power distribution strategy.In addition,a reduced complexity selective mapping (RC-SLM) scheme was proposed.The proposed scheme is based on partitioning the frequency domain symbol sequence into several sub-blocks,and then each sub-block is multiplied by different phase sequences whose length is shorter than that used in the conventional SLM scheme.Then,a kind of low complexity conversions is used to replace the IFFT blocks.The performance of the proposed RC-SLM scheme along with the new approach was studied with computer simulation.The obtained results show that the proposed RC-SLM scheme is able to achieve the lowest computational complexity when compared with other low complexity schemes proposed in the literature while at the same time improves the PAPR reduction performance by about 0.3 dB.

防火墙安装终极功略

让PC直接暴露在Internet上,就好比离家时不锁房门,最后的结果是有人有意或无意地闯入您的房间,将金银珠宝一扫而光。怎样才能保障系统的安全呢?安装防火墙软件算是最常采用的措施了吧,而通常作为补充手段,安装基于硬件的防火墙也是常用的措施。而即便您是一位经验丰富的老手,配置防火墙也并不是件轻松的活儿。如果您曾经放弃了安装防火墙的念头,或者不能确定防火墙是否对系统进行了全面的保护,没关系,今天我们将为您解析个中奥妙。