Auxiliary guidance manufacture and revealing potential mechanism of perovskite solar cell using machine learning

To promote the development of global carbon neutrality,perovskite solar cells(PSCs)have become a research hotspot in related fields.How to obtain PSCs with expected performance and explore the potential factors affecting device performance are the research priorities in related fields.Although some classical computational methods can facilitate material development,they typically require complex mathematical approximations and manual feature screening processes,which have certain subjectivity and one-sidedness,limiting the performance of the model.In order to alleviate the above challenges,this paper proposes a machine learning(ML)model based on neural networks.The model can assist both PSCs design and analysis of their potential mechanism,demonstrating enhanced and comprehensive auxiliary capabilities.To make the model have higher feasibility and fit the real experimental process more closely,this paper collects the corresponding real experimental data from numerous research papers to develop the model.Compared with other classical ML methods,the proposed model achieved better overall performance.Regarding analysis of underlying mechanism,the relevant laws explored by the model are consistent with the actual experiment results of existing articles.The model exhibits great potential to discover complex laws that are difficult for humans to discover directly.In addition,we also fabricated PSCs to verify the guidance ability of the model in this paper for real experiments.Eventually,the model achieved acceptable results.This work provides new insights into integrating ML methods and PSC design techniques,as well as bridging photovoltaic power generation technology and other fields.

Method of Weave Design Using the Concept of Auxiliary Dobby Shaft

The craft of auxiliary dobby shaft is one of methods used in the traditional figured woven textiles and especially brocade in China.Based on the principle of auxiliary dobby shaft,a new method of weave design was proposed.The relevant arrangement of warp and weave design were discussed.It is shown that this method can be applied on one electronic jacquard loom with single warp beam for new product development and production.And this effect will open up a new way to reproduce traditional fabrics in order to protect and develop Chinese traditional culture.

Design Scheme of New Type Shell Raising and Feeding System of Medium-large Caliber Naval Gun

The medium -large caliber naval gun is still playing an important role in modern war. The development of highly automatic Shell Raising and Feeding System (SRFS) in the world has been briefly outlined. Several typical SRFS of medium-large caliber naval guns have been analyzed. A re-design of the system is introduced, in which systematic design method has been used to demonstrate its feasibility. The design goal of the system is to realize rapid shell feeding, with application to many types of shells, quick change of shell types , accurate and reliable feeding operation, simple mechanical structure and easy realization of shell withdrawing.

DEM analysis of the influence of stirrer design on die filling with forced powder feeding

Die filling is a critical stage during powder compaction,which can significantly affect the product quality and efficiency.In this paper,a forced feeder is introduced attempting to improve the filling performance of a lab-scale die filling system.The die filling process is analysed with a graphics processing units(GPU)enhanced discrete element method(DEM).Various stirrer designs are assessed for a wide range of process settings(i.e.,stirrer speed,filling speed)to explore their influence on the die filling performance of free-flowing powder.Numerical results show that die filing with the novel helical-ribbon(i.e.,type D)stirrer design exhibits the highest filling ratio,implying that it is the most robust stirrer design for the feeder configuration considered.Furthermore,die filling performance with the type D stirrer design is a function of the stirrer speed and the filling speed.A positive variation of filling ratio(ηf>0%)can be ensured over the whole range of filling speed by adjusting the stirrer speed(i.e.,increasing the stirrer speed).The approach used in this study can not only help understand how the stirrer design affects the die filling performance but also guide the optimization of feeder system and process settings.

Effects of Cigarette Auxiliary Material Parameters on Release Amounts of Tar, CO and Free Radicals in Cigarette Mainstream Smoke

[Objective] This study aimed to investigate the effects of cigarette auxiliary material parameters on release amounts of tar, CO and free radicals in cigarette mainstream smoke. [Method] The effects of cigarette paper air-permeability, cigarette paper gram weight, filter rod pressure drop and filter tip ventilating strength parameters on the release amounts of tar, CO and free radicals in cigarette mainstream smoke were investigated by single factor experiment and orthogonal experiment. [Result] The cigarette paper air-permeability, filter rod pressure drop and filter tip ventilating strength showed significantly negative correlation with the release amounts of tar, CO and free radicals in cigarette mainstream smoke, to be specific, the cigarette paper air-permeability showed the greatest effect on the release amounts of tar and CO, filter tip ventilating strength showed the greatest effect on the release amounts of gaseous-phase free radicals and particulate-phase free radicals, while cigarette paper gram weight showed relatively slight effect on the release amounts of tar, CO and free radicals. Within the orthogonal experimental range, the optimal program is identified as cigarette paper airpermeability of 70 CU, filter rod pressure drop of 4500 Pa/unit, and filter tip ventilating strength of 60 CU. Compared to the results without optimization, the release amounts of tar, CO and free radicals after optimization were all reduced. [Conclusion] This study laid the foundation for the research of cigarette tar reduction and harm reduction.

Feed Production for Tenebrio molitor L. by Fermentation of Corn Stalks

In order to reduce the economic costs for breeding Tenebrio molitor L. and increase the utilization rate of corn stalk, with corn, wheat bran and corn stalk as the raw materials, 13 different compound feed were designed by Minitab （R） 15.1.0.0. The design was then divided into two groups based on addition or without addition of vegetable leaves to study the effects of compound feed and vegetable leaves on growth and de- velopment of T. molitor. The results showed that body weight, duration, crude protein content and pupation rate of larvae and emergence rate of adults were significantly affected by compound feed and vegetable leaves （ P 〈 0.05）. The larvae bred with feed 5 had the largest body weight, with the shortest duration; the larvae bred with feed 3 had the highest pupation rate; the larvae bred with feed 7 had the highest crude protein content; the adult bred with feed 9 had the largest emergence rate. Overall breeding effect of feed 7 ＋ vegetable leaves was better than any other groups, with ideal indicators, higher utilization rate and lower breeding cost. Its formula was w （wheat bran） = 33.33%, w （corn） = 33.33%, w （corn stalks） = 33.33%. Therefore, the growth of T. molitorwas significantly affected by feed types, and feed 7 ＋ vegetable leaves could be promoted in the production.

Design and optimization in multiphase homing trajectory of parafoil system

In order to realize safe and accurate homing of parafoil system,a multiphase homing trajectory planning scheme is proposed according to the maneuverability and basic flight characteristics of the vehicle.In this scenario,on the basis of geometric relationship of each phase trajectory,the problem of trajectory planning is transformed to parameter optimizing,and then auxiliary population-based quantum differential evolution algorithm(AP-QDEA)is applied as a tool to optimize the objective function,and the design parameters of the whole homing trajectory are obtained.The proposed AP-QDEA combines the strengths of differential evolution algorithm(DEA)and quantum evolution algorithm(QEA),and the notion of auxiliary population is introduced into the proposed algorithm to improve the searching precision and speed.The simulation results show that the proposed AP-QDEA is proven its superior in both effectiveness and efficiency by solving a set of benchmark problems,and the multiphase homing scheme can fulfill the requirement of fixed-points and upwind landing in the process of homing which is simple in control and facile in practice as well.

Robust Variance-Constrained Design for Uncertain Continuous Stochastic Systems via Output Feedback

This paper studies the problem of robust controller design for linear perturbed continuous stochasticsystems with variance constraints via output feedback. The goal is to design static output feedback controllers suchthat the uncertain system has the desil'ed stability margin and the steady-state variance constraints. The existenceconditions for the desired controllers are discussed, and the analytical expression of these controllers is alsocharacterized. A numerical example is provided to demonstrate the directness and effectiveness of the proposedmethod.

Design and Application of Dietary Formula for Muscovy Duck at Different Growth Stages

In this study,feed formulation software REFS3000 was applied to design dietary formula for black-feather Muscovy duck at different growth stages,which provided the basic information for dietary combination in further feeding experiment,aiming at improving the targeted feeding level of duck in China.

砻谷机转子系统结构参数辅助计算系统的设计与实现

[目的]提高胶辊砻谷机转子系统机械工作效率。[方法]基于VB与Matlab平台开发可在Windows系统下独立安装运行的胶辊砻谷机转子系统结构参数辅助计算系统(RRHRSPD)。根据等效设计方法和传统机械设计方法建立了砻谷机的工艺参数、动力参数、结构参数间的耦联关系,探明了转子系统结构参数的设计计算原理;采用VB开发系统操作界面并实时调用Matlab动态链接库,形成系统的核心运算机制,并对系统进行封装发布。[结果]开发了一套胶辊砻谷机转子系统结构参数辅助计算系统。[结论]该系统的计算结果准确、可靠,不仅可用于砻谷机转子系统机械结构的设计计算,也可用于砻谷机性能分析的虚拟试验平台。

基于改进连续时间动态系统的模拟SAT求解器

针对布尔可满足性问题的高效求解进行了研究。首先,通过对k-SAT问题和基于耦合常微分方程形式的确定性连续时间动态系统的分析,提出了一种基于时延信息形式的改进连续时间动态系统方程,以保持集中搜索特性;然后,提出了实现该系统方程的三个主要组件即信号动态电路、辅助变量电路和数字验证电路的模拟设计。在信号动态电路的设计中,设计了一种获得更高性能、更小面积和更低功耗的模拟硬件形式;在提出的辅助变量电路和数字验证电路的模拟硬件设计中,实现了避免梯度下降搜索陷入无解和确定给定问题的解是否已经找到的目标;同时提出了降低面积和功耗的可替代辅助变量电路的两种设计方案。仿真实验结果表明,提出的新的模拟SAT求解器不仅是有效的,而且相比于单一软件算法实现的SAT求解器和其他硬件类SAT求解器具有更高的加速性能和更低的功耗。

激光旁轴送气结构设计与分析

目的通过了解激光增材技术,设计一种送丝送气一体化机构,并建立相应模型。方法通过对不同送丝送气机构进行对比分析,设计出3种方案,并通过流体模型分析保护气体氩气的流动情况,最终得出最合理的安装位置。第1种方案是采用送丝机构与送气机构对冲的两轴送丝送气设计方案;第2种方案是采用送丝机构与送气机构同路的设计方案;第3种方案是选择两路送气机构与送丝机成夹角对冲的设计方案。结果在第1种方案中,送丝机构与送气机构的对冲会导致气流紊乱,产生气体流动扩散现象,可以明显看到有一个保护气体比较密集的区域。在第2种方案中,当送丝机构与送气机构同路时,在工作过程中有可能出现防氧化效果不够好的情况。在第3种方案中,两路送气机构与送丝机成夹角对冲可以有效控制氩气的流动,提高氩气的利用率,在这里进行丝材的激光熔覆将会起到最大的防氧化保护作用。结论通过对不同送丝送气机构进行对比分析,最终确定三路送气方案的保护效果最佳。

居家治疗场景下胃癌患者鼻肠管管饲支持系统设计

医疗资源紧张和新冠疫情背景下,胃癌患者居家治疗需求突出。本文旨在探索居家治疗场景下胃癌患者鼻肠管管饲支持系统设计模式。明确胃癌患者鼻肠管治疗护理需求,分析比较患者在医院和居家治疗场景下的护理流程,注重环境普适性,结合人性化设计理念,综合考虑患者及家属操作人机工学因素,建立鼻肠管营养支持系统整体架构,简化操作流程,减轻患者病痛,降低家属心理负担。为胃癌患者鼻肠管居家治疗提供新的研究思路。

基于企业品牌价值推广的饲料环保包装研究

随着经济的发展和社会的进步,环境保护、资源节约备受消费者的关注,在需求导向下,绿色环保成为企业的发展方向。对饲料企业而言,要想推广品牌价值,并以良好的品牌形象带动饲料企业的可持续发展,需要从环保角度优化包装设计,减少废弃饲料包装对环境造成的污染问题。为此,本文从饲料包装的环保要求出发,分析了品牌价值视角下推广饲料环保包装的意义,针对饲料环保包装的优化设计提出参考意见,以期满足消费者的环保需求,在实现饲料产品促销的同时提高饲料企业的品牌价值。

大型副立井提升容器布置形式设计研究

结合某矿设计实例,对大型副立井提升容器布置形式的设计要点进行归纳总结,深入分析可行方案,从实用性、便利性和井筒直径等方面进行研究,得出了大型副立井最适用的提升容器布置形式,为其他矿井类似工程设计提供了经验,具有较高的参考价值。

草方格沙障铺设车输料装置及其拢草机构分析

针对以散草为原料铺设草方格沙障存在空隙的问题,提出了一种草方格沙障铺设车。阐述了该铺设车的整体设计和作业流程,对输料装置进行结构设计和工作过程分析,对该装置的拢草机构进行运动学分析和仿真分析。结果表明:拢草机构的运动满足设计要求,同时给了一组工作参数,以转速为95 r/min为例,水平方向齿尖位置在90 mm左右时,其速度约为310 mm/s,超过传送带输送速度,由此点作为工作切入点,扒齿有效工作距离约为180 mm,在水平位移约为4 mm时,竖直位移大于7 mm,满足预期工作要求。

抽水蓄能电站厂用电系统备自投设计及实现

大中型水电站厂用电系统接线复杂,备自投动作逻辑也不简单,同时还需考虑两级备自投之间的动作配合。针对某抽水蓄能电站10 kV及0.4 kV厂用电系统备自投的设计原则、动作逻辑等方面开展了研究,提出两级厂用电系统备自投间的定值及动作时间配合方案,可以保证电站厂用电系统的安全可靠运行。

深江铁路洪奇沥公铁两用大桥主桥方案构思与总体设计

深江铁路洪奇沥公铁两用大桥主桥采用(3×100+808+3×100)m超短边跨钢-混组合混合梁斜拉桥,一跨跨越通航水域。该桥公铁分层布置,上层布置8车道城市快速路,下层布置4线铁路。主梁采用倒梯形双主桁截面,桥面布置紧凑、受力明确、经济性好。中跨主梁采用板桁-箱桁组合结构钢梁,桥面结构参与主桁受力,具有高效综合性能。边跨主梁采用矩形钢管混凝土叠合板-桁组合梁,融结构受力和锚固压重于一体,叠合板采用32 cm厚预制板+40 cm厚现浇层。钢-混结合段采用“钢格室+承压板”构造,钢-混结合面位于桥塔向中跨侧4.6 m。桥塔采用H形混凝土塔,基础采用35根直径4.0 m的大直径钻孔灌注桩。斜拉索采用标准抗拉强度2000 MPa的平行钢丝成品索,最大规格为PES(C)7-547。索梁锚固采用副桁弦杆节点兜底钢锚箱结构,传力可靠、抗疲劳性能好。索塔锚固创新地采用自平衡交叉混合锚固技术,以适应大规格斜拉索锚固。钢桁梁采用“纵向分段、横向分区”制造、运输、现场吊装的施工方案。

AIGC技术在视觉传达设计中的有效运用

AIGC技术和传统的设计方式相比,有着自动化、创新性等众多优势,将其引入视觉传达设计中,可拓宽设计路径,创新创作方式,大幅提升创作效率,其应用价值毋庸置疑。但从AIGC技术在视觉传达设计的应用现状来看,还存在不少问题,为确保技术的价值可充分展现出来,后续还需要不断地探索与实践。本文通过对AIGC技术在视觉传达设计中的应用价值进行探究,指出AIGC技术在视觉传达设计中应用面临的挑战,提出AIGC技术在视觉传达设计中的应用策略。

顶板深孔爆破炸药辅助推送车的研发

针对目前冲击地压矿井的煤层顶板深孔爆破主要采用人工装药的现状,课题研发了顶板深孔爆破炸药辅助推送车,主要开展辅助推送车的关键机械结构设计、行走和推送过程中防侧翻的运动学分析、关键部件的结构强度分析,通过校核计算及有限元分析验证辅助推送车的可靠性。通过现场试验表明,该装置结构稳定可靠,满足深孔爆破时炸药管高效、安全推送的要求,能提高深孔爆破时炸药管安装效率,有效降低劳动强度,提高施工效率,保障安全生产。