基于Cape Pack与Load Expert多包装配送的优化

目的运用科学方法合理优化运输方案。方法利用运输设计软件Cape Pack和Load Expert,从运输包装物品的排列方式入手进行空间优化设计。结果听装运输包装尺寸为200 mm×300 mm×103 mm、PET瓶装运输包装尺寸为169 mm×173 mm×224 mm、冲剂袋装盒式运输包装尺寸为250 mm×568mm×166 mm时的组合运输更加经济。结论优化后的方案可节约运输货车的使用,提高配送效率,降低物流业运输配送的成本。     

IPv6实验网的组建和测试分析

主要介绍设计、搭建IPv6实验网，并在此基础上捕获数据包，测试协议性能。通过分析数据包的结构，验证了IPv6网络的特点：地址匹配的方便性、数据报头的简洁性。通过设计和组建IPv6／IPv4双协议栈路由器，介绍了一种通过IPv4网络转发IPv6数据包的双协议栈隧道技术。     

TC4合金表面Y改性铝化物涂层的组织及高温氧化性能

为提高TC4合金的抗高温氧化性能。采用在900,940和980℃扩散渗2 h的方法在TC4合金表面制备了Y改性的铝化物渗层,并通过扫描电子显微镜、X射线衍射仪及能谱仪分析了渗层的结构及相组成,研究了渗层在1000℃时的抗氧化性能,讨论了其氧化机制。结果表明:不同温度所制备的渗层主要组成相均为Al₃Ti,此外在900℃制备渗层中含有少量的Al₂₃V₆,在940,980℃制备渗层中分别检测到了Al₂Ti₃及Al₂Ti相;渗剂中添加Y能够降低涂层的内应力,抑制渗层中裂纹的产生。940℃共渗2 h制备的Y改性Al化物渗层在1000℃氧化50 h后表面形成了致密的Al₂O₃氧化膜,显著的提高了TC4合金的抗高温氧化性能。     

Oxidation behaviour and microstructure of a dense MoSi2 ceramic coating on Ta substrate prepared using a novel two-step process

Tantalum (Ta) alloys are important ultra-high-temperature structural materials owing to their excellent high-temperature mechanical properties and processability. However, they exhibit poor high-temperature oxidation resistance. In this study, a dense MoSi₂ ceramic coating was prepared on a Ta substrate using an innovative multi-arc ion plating process and halide activated pack cementation in order to improve its ultra-high-temperature oxidation resistance. This ceramic coating exhibited a low roughness space arithmetic (287.1 ± 26.3 nm) and a dense structure. The relationship between the thickness of the coating and the duration of pack-cementation at 1250 ℃ was parabolic. The coating had a service life of more than 12 h at 1750 ℃, and showed excellent high-temperature oxidation resistance because of the uniform and dense structure of the coating and the rapid formation of a dense SiO₂ layer with low O₂ permeability during high-temperature oxidation.     

帧中继和异步转移模式技术

文章简述从分组交换，帧中继（ＦＲ）到异步转移模式（ＡＴＭ）技术，由于ＡＴＭ实时性好，时延短，因此适用于电力系统通信。     

Multi-layered silicides coating for vanadium alloys for generation IV reactors

The halide-activated pack-cementation technique was employed to fabricate a diffusion coating that is resistant both to isothermal and to cyclic oxidation in air at 650 °C on the surface of the V–4Cr–4Ti vanadium alloy that is a potential core component of future nuclear systems. A thermodynamic assessment determined the deposit conditions in terms of master alloy, activator, filler and temperature. The partial pressures of the main gaseous species (SiCl₄, SiCl₂ and VCl₂) in the pack were calculated with the master alloy Si and the mixture VSi₂ + Si. The VSi₂ + Si master alloy was used to limit vanadium loss from the surface. The obtained coating consisted of multi-layered V_xSi_y silicides with an outer layer of VSi₂. This silicide developed a protective layer of silica at 650 °C in air and was not susceptible to the pest phenomenon, unlike other refractory silicides (MoSi₂, NbSi₂). We suggest that VSi₂ exhibits no risk of rapid degradation in the gas fast reactor (GFR) conditions.     

Authorware库文件的设计及应用

介绍了Authorware库文件的基本概念，设计技术和应用技术，然后描述了应用程序和库文件的打包技术。     

SiC涂层对泡沫炭高温抗氧化性能的影响

采用包埋法在中间相沥青基泡沫炭表面生成了一层致密的高温抗氧化碳化硅涂层,研究了SiC涂层对泡沫炭高温抗氧化性能的影响.通过热重分析仪(TG)对有、无SiC涂层的泡沫炭的抗氧化性能变化进行了分析,采用扫描电子显微镜(SEM)分析了SiC涂层的结构和形貌特征变化,同时在1 200℃空气气氛中对SiC涂层的抗氧化性能进行了测试.结果表明:SiC涂层使泡沫炭的抗氧化性能有了显著的提高,并且随着SiC涂层厚度的增加,泡沫炭的抗氧化性能也随之增强.     

Oxidation resistance of SIC-AlN ceramics coated by oxidation-assisted-pack cementation process

Liquid-phase-pressureless-sintered SiC-AlN-Y₂O₃ composites were coated by means of modified pack cementation process (OXPAC, OXidation-assisted-PAck Cementation) using rare-earth oxides, RE₂O₃ (RE = Sc, Er, Sm, Lu, Ho), as reactive powders. The coatings, composed by the oxidation products of SiC, AlN and rare-earth silicates, were adherent to the substrate, without porosity and with a thickness of 10 μm. The oxidation resistance of the coated SiC-AlN-Y₂O₃ ceramics was also investigated at 1500 °C for a period of 200 h. The coated samples showed specific weight gain lower than the uncoated and pre-oxidised samples. Furthermore, the specific weight gain linearly increased with the rare-earth cationic radius.     

无菌袋式大包装灌装设备及工艺探讨

本文介绍国产无菌袋式大包装的灌装设备－液体无菌自动灌装机的结构及性能，同时也介绍了其配套它设备的选用及工艺流程方案的选择。