摘要：本文介绍了150W，150kHz双晶体管电流型正向变流器的设计，其中包括噪声控制，反馈，电路分析及磁性元件设计。

摘要：Metal-based secondary building unit and the shape of organic ligands are the two crucial factors for determining the final topology of metal-organic materials.A careful choice of organic and inorganic structural building units occasionally produces unexpected structures,facilitating deeper fundamental understanding of coordination-driven self-assembly behind metal-organic ***,we have synthesized a triangular metal-organic polygon(MOT-1),assembled from bulky tetramethyl terephthalate and Zr-based secondary building ***,the Zr-based secondary building unit serves as an unusual ditopic Zr-connector,toform metal-organic polygon MOT-1,proven to be a good candidate for water adsorption with *** study highlights the interplay of the geometrically frustrated ligand and secondary building unit in controlling the connectivity of metal-organic *** a strategy can be further used to unveil a new class of metal-organic materials.

摘要：在数码单反领域，奥林巴斯一直以来都以新颖技术倡导者的前卫形象示人，旗下产品无一不透射出设计思路上的灵气。新近上市的E-520是目前奥林巴斯入门级别单反当中性能最好的一款。拥有改良后的Live View和更加强大的防抖功能，下面我们就来一窥奥林巴斯E-520的真实表现。

摘要：Recently,the increasing interest in wearable technology for personal healthcare and smart virtual/augmented reality applications has led to the development of facile fabrication *** have long been used to develop original solutions to such challenging technological problems due to their remote,sterile,rapid,and site-selective processing of *** this review,recent developments in relevant laser processes are summarized under two separate ***,transformative approaches,such as for laser-induced graphene,are *** addition to design optimization and the alteration of a native substrate,the latest advances under a transformative approach now enable more complex material compositions and multilayer device configurations through the simultaneous transformation of heterogeneous precursors,or the sequential addition of functional layers coupled with other electronic *** addition,the more conventional laser techniques,such as ablation,sintering,and synthesis,can still be used to enhance the functionality of an entire system through the expansion of applicable materials and the adoption of new ***,various wearable device components developed through the corresponding laser processes are discussed,with an emphasis on chemical/physical sensors and energy *** addition,special attention is given to applications that use multiple laser sources or processes,which lay the foundation for the all-laser fabrication of wearable devices.

摘要：2006年,尼康用D40将入门单反的价格门槛大幅降低,尽管采用了取消机身对焦马达等缩减成本的设计,在上市后饱受争议,但一再走高的关注度和销量已经足够说明尼康入门单反的成功。不过数码产品的更新速度众所周知,像素升级后的D40x进一步满足了入门用户对大尺寸输出的要求,那么今年上市的D60又会带给我们什么呢?与时俱进还是原地踏步?接下去的试用体验便会揭开所有的谜团。

摘要：The use of commercial products such as a cup and liner for total hip arthroplasty for patients with severe bone defects has a high probability of *** these patients the cup alone cannot cover the bone defect,and thus,an additional augment or cage is *** this study,we designed three-dimensional(3D)printable bone augments as an alternative to surgeries using reinforcement ***-five sharp-edged bone augments of various sizes were 3D printed.A biporous structure was designed to reduce the weight of the augment and to facilitate bone *** types of frames were used to prevent damage to the augment’s porous structure and maintain its stability during ***,two types of holes were provided for easy augment fixation at various *** tests were performed on a combination of worst-case sizes derived using finite element *** test results confirmed the structural stability of the specimens at a load of 5340 *** the porosity of the specimens was measured to be 63.70%,it cannot be said that the porous nature was uniformly distributed because porosity tests were performed locally and *** summary,3D-printable biporous bone augments capable of bonding from various angles and bidirectionally through angulation and bottom-plane screw holes are *** mechanical results with bone augments indicate good structural safety in ***,further research is necessary to study the clinical applications of the proposed bone augment.

摘要：2004年7月,世界汽车市场竞争依然激烈,几家欢乐几家愁局面更加明显。丰田依旧显示出强大的上升态势,在日本本土、北美、欧洲都有不凡的表现。而另一家日本汽车巨头三菱的日子就不那么好过了,自从传出隐瞒车辆的设计缺陷以来,在国际市场屡屡受挫,在关键时刻戴-克集团的撤资无疑更是雪上加霜,犹如在伤口上加了一把盐。

摘要：Type 1 diabetes is caused by insulin deficiency due to the loss of beta cells in the islets of *** severe cases,islet transplantation into the portal vein is ***,due to the loss of transplanted islets and the failure of islet function,the 5-year insulin independence rate of these patients is<50%.In this study,we developed a long-term,insulin-secreting,3 Dbioprinted construct implanted subcutaneously with the aim of preventing islet *** bioprinted construct was fabricated by the multi-layer bioprinting of beta-cell(mouse insulinoma-6:MIN-6)-encapsulated alginate bioink and poly(caprolactone)biodegradable polymer.A glucose response assay revealed that the bioprinted constructs proliferated and released insulin normally during the 4-week in vitro *** MIN-6 generated clusters with a diameter of 100-200μm,similar to the original pancreatic islets in the *** an in vivo study using type 1 diabetes mice,animals implanted with bioprinted constructs showed three times higher insulin secretion and controlled glucose levels at 8 weeks after *** the implanted,bioprinted constructs had a positive effect on insulin secretion in the experimental animals,the survival rate of the implanted group(75%)was three times higher than that of the non-implanted group(25%).The results suggest that the proposed,3 D-bioprinted,subcutaneous construct can be a better alternative to portal vein islet transplantation.

摘要：In radio receivers,complete implementation of the software defined radio(SDR) concept is mainly limited by *** on bandpass sampling(BPS) theory,a flexible digital frontend(DFE) platform for SDR receiver is *** order to increase the processing speed,Gigabit Ethernet was applied in the platform at speed of 5×10~8 bit/*** appropriate design of interpolant according to the position of input RF signals,multi-band receiving can be realized in the platform with suppression more than 35 d B without changing hardware.

摘要：以“面包、咖啡邀您就座”作为新店形象宣言，BRCD（Breac Is Reacy，Coffee Is Done的首字母缩写词，意即面包出炉，咖啡上座）在Konkuk大学附近的Starcity声势隆重地开业了。多功能的店面设计分为用餐区和咖啡区两个独立空间。