Musie Disc酷碟：重金属Heavy Metal

一起耕牛于硬摇滚（HARD ROCK）的风格在上世纪七、八十年代开始风靡整个西方世界，到了八十年代大批的重金属乐队开始展露头角，像被无数青少年追捧，现在依旧活跃在世界音乐舞台上的Guns X oses,Aerosmith这样的超级乐队就是那时出现的。一头飘逸的长发、皮衣皮裤尖尖的皮鞋还有夸张的化装和饰物构成了那个年代最基本的外在特征，     

Power Metal Strip~仪表分流电阻 首次实现直接PCB安装

日前,Vishay推出新款Power MetalStrip~仪表分流电阻——WSMS2908,在业内首次采用可直接焊到PCB板上的传感引线,无需昂贵的柔性引线。在2908尺寸的封装内,WSMS2908实现了3W功率和100μΩ的极低阻值。WSMS2908仪表分流电阻采用独家     

Mathematical Simulation of Arc Suppression by Devices with a Liquid–Metal Contact

The problem of simulation of the arc-suppression process in the case of switching off high-current dc circuits by devices with a liquid–metal working medium is considered. Since devices with a liquid–metal contact are designed to switch specific power circuits, the possibility of joint consideration of the electrical circuit and the switch is used to optimize the shutdown process. The obtained mathematical model allows with the use of the known temperature profile of the dynamic arc to calculate the main dynamic characteristics of the arc discharge, such as current, voltage, conductivity, temperature, and the trunk conductor radius. It is shown that, if the real temperature profile of the arc is not known, calculation of such integral characteristics of the arc-suppression process as current, resistance and intensity of the arc trunk can be carried out with the use of an equivalent temperature profile. On the basis of the obtained mathematical model, a calculation methodology is developed for the process of circuitry cutout by an apparatus with liquid–metal contacts with a change in the topological structure of the circuit being switched off during the commutation process.     

畅享高端创意蓝牙耳机iLIKE Speed Metal/iLIKE融合蓝牙耳机体验评测

蓝牙耳机自问世以来一直备受消费者的喜爱，它不仅让用户免除了电线的牵绊，而且使用起来更轻松自在，已成为必不可少的手机伴侣。本期《消费电子》评测室迎来了著名创意数码品牌iLIKE最新推出的两款蓝牙耳机iLIKE Speed Metal和iLIKE 融合。这两款蓝牙耳机颇具特色，一款造型精致，一款创意十足，而这两方面恰恰是消费者选择蓝牙耳机的重要标准。现在就一起来体验一下这两款特色蓝牙耳机吧。     

畅享高端创意蓝牙耳机iLIKE Speed Metal/iLIKE融合蓝牙耳机体验评测

蓝牙耳机自问世以来一直备受消费者的喜爱，它不仅让用户免除了电线的牵绊，而且使用起来更轻松自在，已成为必不可少的手机伴侣。本期《消费电子》评测室迎来了著名创意数码品牌iLIKE最新推出的两款蓝牙耳机iLIKE Speed Metal和iLIKE 融合。这两款蓝牙耳机颇具特色，一款造型精致，一款创意十足，而这两方面恰恰是消费者选择蓝牙耳机的重要标准。现在就一起来体验一下这两款特色蓝牙耳机吧。     

P-Type Electronic Transport in Ce0.8Gd0.2O2 − δ: The Effect of Transition Metal Oxide Sintering Aids

Small (2 mol%) additions of cobalt, iron and copper oxides into Ce_0.8Gd_0.2O_{2 –} considerably improve sinterability of ceria-gadolinia (CGO) solid electrolyte, making it possible to obtain ceramics with 95–99% density and sub-micron grain sizes at 1170–1370 K. The minor dopant additions have no essential effect on the total and ionic conductivity, whilst the p-type conduction in the transition metal-containing materials at 900–1200 K is 8–30 times higher than that in pure CGO. The oxygen ion transference numbers of the Co-, Fe- and Cu-doped ceramics, determined by the modified e.m.f. technique under oxygen/air gradient, are in the range 0.89–0.99. The electron-hole contribution to the total conductivity increases with temperature, as the activation energy for ionic conduction, 78 to 82 kJ/mol, is significantly lower than that for the p-type electronic transport (139–146 kJ/mol). The results show that CGO sintered with such additions can still be used as solid electrolytes for intermediate-temperature electrochemical applications, including solid oxide fuel cells (SOFCs) operating at 770–970 K, but that increasing operation temperature is undesirable due to performance loss.