中国蜂窝包装的希望在哪里

中国蜂窝包装,最近几年发生了奇妙的变化,散的散,上的上。而江西“富祥”蜂窝坚挺在景德镇,那是怎么回事?我们有心去学习,“富祥”老总亦多次盛情邀请我去。近日得宽余,专程前往,在那里看了他们制造的蜂窝纸板生产线,了解了他们的精加工设备,会见了他们的蜂窝机械工程技术人员,同     

蜂窝纸板压缩破坏机理研究

从蜂窝纸板的结构和力学角度分析了蜂窝纸板的破坏模式、纸蜂窝芯的压缩破坏过程和蜂窝胞壁壁板受载破坏机理,得知蜂窝纸板的压缩破坏主要与纸蜂窝芯的结构和蜂窝胞壁的屈曲有关,为蜂窝纸板缓冲性能的研究提供了理论基础.     

未来十年蜂窝天下

我们对蜂窝提出句口号.中国蜂窝界联合起来,未来十年,蜂窝天下.蜂窝在中国已有十多年历史一直在困难中前进,在曲折中发展,从来没有一帆风顺,现在还是初级阶段,要说中国蜂窝同国际蜂窝先进技术相比,怎么比呢?在中国捅蜂窝的人,那个也说不清楚.国外蜂窝技术对我们封锁,我们全靠自己干,蜂窝的老祖宗在中国,中国人在2000年前就发现了蜂窝,用蜂窝结构的原理作纸玩具,这是美国人在一本书里讲的.     

无孔蜂窝夹层结构脱粘剥离应力分析

将建筑中的弹性地基上板的理论用于蜂窝夹层结构分析, 得出了蜂窝夹层结构面板的变 形和夹芯中的应力分布, 建立了有脱粘缺陷蜂窝结构的缺陷容限。      

汽车尾气净化器载体的研究现状及发展

由于汽车尾气造成的空气污染日趋严重,汽车尾气净化器用载体成为人们研究的热点之一。系统地介绍了陶瓷载体和金属载体的发展状况,分析比较了两者在性能和技术上的优缺点。结合以前的研究,提出运用金属粉末增塑挤压-烧结成型技术制作金属蜂窝载体材料是具有应用开发价值的发展方向。     

航改型燃气轮机蜂窝封严真空钎焊技术研究

该文针对某航改型燃气轮机气封蜂窝组件磨损修复,总结蜂窝封严真空钎焊维修开发工艺实践经验,重点介绍了试修环形蜂窝封严结构件各工艺流程质量控制方法和钎焊蜂窝封严结构件关键技术难点,结合生产实际提出了操作技巧,为燃气轮机自主维修提供一定的技术支持。     

蜂窝纸板和蜂窝纸托盘的性能研究进展

简述了蜂窝纸板和蜂窝纸托盘的性能研究现状.通过对已有研究的分析,发现目前对于蜂窝纸板的性能研究主要集中在纸板的性能指标、静态和动态特性、理论建模和有限元建模分析等方面,而对于蜂窝纸托盘的研究主要集中在力学性能和结构优化等方面.但已有研究缺乏从现实环境考虑的一些动力学方面影响因素的测试和分析,为提高蜂窝纸板和蜂窝纸托盘的实际应用,这将是以后对蜂窝纸板和蜂窝纸托盘研究的重点和难点.     

蜂窝结构对蜂窝纸板平压性能影响的研究

研究了蜂窝纸板结构对其平压性能的影响,分析了蜂窝纸板平压强度与蜂窝半径与孔径比的理论计算模型,将试验结果与理论模型进行了综合分析,得出了平压强度的预测计算公式,且预测结果与试验结果有较好的一致性。     

Leukaemia following childhood radiation exposure in the Japanese atomic bomb survivors and in medically exposed groups

Incidence and mortality risks of radiation-associated leukaemia are surveyed in the Japanese atomic bomb (A-bomb) survivors exposed in early childhood and in utero. Leukaemia incidence and mortality risks are also surveyed in 16 other studies of persons who received appreciable doses of ionizing radiation in the course of treatment in childhood and for whom there is adequate dosimetry and cancer incidence or mortality follow-up. Relative risks tend to be lower in the medical series than in the Japanese A-bomb survivors. The relative risks in the medical studies tend to diminish with increasing average therapy dose. After taking account of cell sterilisation and dose fractionation, the apparent differences between the relative risks for leukaemia in the Japanese A-bomb survivors and in the medical series largely disappear. This suggests that cell sterilisation largely accounts for the discrepancy between the relative risks in the Japanese data and the medical studies. Excess absolute risk has also been assessed in four studies, and there is found to be more variability in this measure than in excess relative risk. In particular, there is a substantial difference between the absolute risk in the Japanese atomic bomb survivor data and those in three other (European) populations. In summary, the relative risks of leukaemia in studies of persons exposed to appreciable doses of ionizing radiation in the course of treatment for a variety of malignant and non-malignant conditions in childhood are generally less than those in the Japanese A-bomb survivor data. The effects of cell sterilisation can largely explain the discrepancy between the Japanese and the medical series.     

21世纪之初工程哲学在东西方的同时兴起

科学哲学和技术哲学都是首先在欧美国家兴起的,可是,工程哲学却是于21世纪之初在中国和欧美发达国家同时兴起和基本同步发展的。文章简要介绍了2002年以来工程哲学在中国和欧美国家发展的重要事件和已经发表的重要著作,最后,简要评论了东、西方工程哲学发展的主要特点。     

铝合金的动态再结晶

本文展现了当前铝及铝合金动态再结晶研究的一些进展。分析了铝合金动态再结晶的特点和材料状态,形变条件对动态再结晶的影响。指出了铝合金动态再结晶研究在理论,实际生产中的意义和铝合金动态再结晶研究的方向。     

5G时代动态可变式校标设计及延展应用

目的探讨5G时代中国高校如何通过具有高识别度和多元变化的校标设计及延展应用,提升中国高校的国际品牌形象,助力中国高校的国际化进程。方法通过比较研究中国137所“双一流”高校与QS世界大学排名前100强高校的校标,以图像分析和统计学的方法揭示中国高校校标设计高度雷同化、辨识度低的现状,指出常见的圆形范式校标在国际竞争和品牌传播中所存在的局限性;借鉴西方品牌形象设计的成功案例,寻找5G时代中国高校校标设计的创新理念、设计方向以及具体的延展应用方法。结论强调独特性、高识别性的校标设计在高校品牌传播中的重要性,并创造性地提出了“动态可变式”校标设计及延展应用在5G时代必将成为高校品牌形象传播的主流趋势和重要手段。     

Generalized model of resonant polymer-coated microcantilevers in viscous liquid media

Expressions describing the resonant frequency and quality factor of a dynamically driven, polymer-coated microcantilever in a viscous liquid medium have been obtained. These generalized formulas are used to describe the effects the operational medium and the viscoelastic coating have on the device sensitivity when used in liquid-phase chemical sensing applications. Shifts in the resonant frequency are normally assumed proportional to the mass of sorbed analyte in the sensing layer. However, the expression for the frequency shift derived in this work indicates that the frequency shift is also dependent on changes in the sensing layer's loss and storage moduli, changes in the moment of inertia, and changes in the medium of operation's viscosity and density. Not accounting for these factors will lead to incorrect analyte concentration predictions. The derived expressions are shown to reduce to well-known formulas found in the literature for the case of an uncoated cantilever in a viscous liquid medium and the case of a coated cantilever in air or in a vacuum. The theoretical results presented are then compared to available chemical sensor data in aqueous and viscous solutions.     

博物馆体验研究的国内现状及趋势分析

目的 对国内外博物馆体验研究的文献进行计量可视化分析,以便客观真实地了解现阶段博物馆体验研究的重点和动态。方法 运用Citespace可视化分析工具对CNKI核心数据库中2000—2022年博物馆体验及Web of Science数据库中核心合集期刊进行量化分析和质化论述,内容包括发文时间、关键词聚类、发文刊物分布、国内外研究侧重点论述、研究共性及差异解读。结论 检索范围内国内外博物馆体验研究发文数量呈快速上升趋势,中文发文刊物主要分布在艺术设计领域,国外发文刊物集中在博物馆学研究领域;国内外研究热点都涉及新媒体技术、文化旅游发展、观众研究方面,但国内主要围绕新媒体技术在展示设计中的应用、观众体验的跟踪调查研究和文旅融合下的游客研究,国外研究主要侧重于数字媒体技术对博物馆休闲娱乐氛围的营造、博物馆中的集体学习体验、文化旅游中博物馆的真实性表达。     

Chromatographic characteristics of surfactant-mediated separations: micellar liquid chromatography vs ion pair chromatography.

The effects of concentrations of organic solvent and surfactant on elution strength and selectivity in MLC and IPC are studied. It is observed that selectivity between most pairs of solutes used in this study increases in MLC and either decreases or passes through a minimum in IPC, with the volume fraction of organic modifier. In both MLC and IPC, selectivity varies with surfactant concentration; however, the overall variation in selectivity and elution order are more pronounced in MLC. The solvent strength decreases in IPC and increases in MLC as a result of an increase in surfactant concentration. An iterative regression design is used to predict the optimum mobile-phase compositions in terms of solvent strength and selectivity. The correlation between the predicted and measured chromatograms is excellent in MLC and poor in IPC. This is due to a more regular and reproducible retention behavior in MLC which greatly facilitates the development of robust methodologies. For a mixture of amino acids and peptides, a large retention gap between the first and the last eluting solutes is observed in IPC, which makes the use of organic solvent gradient inevitable. However, a better separation for the same mixture of solutes can be achieved in MLC isocratically. Apparently, the general elution problem can be alleviated in MLC by using an optimum eluent composition. It is observed that the efficiencies of MLC and IPC are comparable. The above observations indicate that MLC can be a powerful alternative to IPC in order to achieve optimized separations in shorter analysis time.     

Mu and alpha EEG rhythms during the arrest reaction in microgravity

Mu and alpha oscillations (8–12 Hz) are the most prominent electroencephalographic rhythms observed in awake, relaxed subjects. Different cortical sources may participate in these oscillations and appear to be modulated by the sensorimotor context and functional demands. In microgravity, the marked reduction in multimodal graviceptive inputs to cortical networks participating in the representation of space could be expected to affect these spontaneous rhythms. Here, we report the results of an experiment conducted over the course of 3 space flights, in which we quantified the power of the mu and alpha rhythms in relation to the arrest reaction (i.e. in 2 distinct physiological states: eyes open and eyes closed). We observed that the power of the spontaneous mu and alpha rhythms recorded in the eyesclosed state in the sensorimotor areas (mu rhythm) and in the parieto-occipital cortex (alpha rhythm) increased in microgravity. The suppression coefficient produced by eye-opening/ closure state transition also increased in microgravity. These results are discussed in terms of current theories on the source and the physiological significance of these EEG rhythms.     

Quantum Communication Networks and Trust Management: A Survey

This paper summarizes the state of art in quantum communication networks and trust management in recent years. As in the classical networks, trust management is the premise and foundation of quantum secure communication and cannot simply be attributed to security issues, therefore the basic and importance of trust management in quantum communication networks should be taken more seriously. Compared with other theories and techniques in quantum communication, the trust of quantum communication and trust management model in quantum communication network environment is still in its initial stage. In this paper, the core technologies of establishing secure and reliable quantum communication networks are categorized and summarized, and the trends of each direction in trust management of quantum communication network are discussed in depth.