摘要：We investigate an effective grooved 2D ion chip design and optimize the ratio between the size of the rf electrodes and the *** calculate the optimal size of the groove using the analytical model,which was introduced by House,and the optimum result is *** also obtain the simulated scattering points with the finite element analysis *** analytical curve and simulated scattering points are coincident with each *** is shown that this analytical model also fits for the grooved planar ion *** the optimum grooved 2D planar ion chip design could be *** is effective for scalable quantum information processing.

摘要：一维二氧化锆纳米纤维(ZrO_(2)NFs)作为一种重要的无机材料,以其独特的结构特性、优异的化学/热稳定性,以及杰出的光学/电子性能而备受关注.生物模板法、相转化法、离心纺丝法和静电纺丝法是合成ZrO_(2)NFs的简便且高度通用的方法,在隔热、空气过滤、水净化、催化剂载体、染料敏化电池和锂离子电池等新兴应用领域具有巨大的潜力.本文对多孔、中空、层状、甚至三维自组装等多种结构的ZrO_(2)NFs的合成策略进行了详细的描述和分析.此外,本文还讨论了近年来打破陶瓷脆性、构建柔性ZrO_(2)NFs的革命性进展及其变形机制.接着介绍了ZrO_(2)NFs在隔热、环境修复、催化、电池等领域的应用成果.最后,我们提供了关于ZrO_(2)NFs的全面总结、关键挑战和未来展望.本文对未来新型ZrO_(2)NFs的研究具有一定的指导意义.

摘要：本研究利用结构设计理念将TiNCl应用于高倍率锂离子电池,并解释其储能机理.由于Ti-N层的高导电性,它可作为电子导电单元.由Cl层构成的多面体通道有助于锂离子的传输,并作为离子传输单元.此外,由于TiNCl中的Cl带负电的特性,负极材料在1 mV s^(-1)下的赝电容贡献率高达99.5%.而在50 C的高倍率下,经过1000次循环后,它依旧保持极高的可逆比容量(202 mA h g^(-1)).这种基于结构单元的设计理念对于研发高性能新型电极材料具有指导意义.

摘要：A novel high-frequency and high power density planar insulated core transformer(PICT) applied to high voltage DC generator is introduced. PICT's operating principle and fundamental configuration are described,and preliminary experimental results in self-designed PICT apparatus are presented. Emphatically, magnetic leakage flux(MFL) giving rise to the output voltage drop is analyzed in detail both theoretically and by finite element method(FEM). Showing good consistency with experimental result, FEM simulation is considered to be practicable in physical design of PICT. To cancel out leakage inductance and improve the voltage uniformity,compensation capacitor is adopted and experimental verification is also presented. All shows satisfactory results.

摘要：尽管许多催化剂已经被报道用于电化学转换二氧化碳(CO_(2))到甲烷(CH_(4))或者二碳(C_(2))产物,然而目前对各种产物之间的关联的研究仍然不够深入,这阻碍着催化剂设计的进一步发展.本文通过研究商品化铜粉(Cu)作为CO_(2)电还原的阴极催化剂,发现一氧化碳中间体(*CO)在催化剂表面的覆盖度在较大的电位区间内会保持基本不变,且在这个电位区间内,CH_(4)与C_(2)产物的分电流密度呈线性关系,这一结论得到了理论动力学分析的支持.由于*CHO中间体分子是产生CH_(4)(*CHO→CH_(4))与C_(2)产物(*CHO+*CO→C_(2))的共同中间体,我们进一步猜想该线性关系是普遍存在的,且可以通过调节催化剂表面的吸附氢(*H)或者一氧化碳(*CO)的覆盖度,以分别促进CH_(4)或者C_(2)产物的生成,并改变线性关系的斜率.为了验证该猜想,本文合成了碳包覆的铜(Cu@C)催化剂,其中碳层可增加催化剂表面的*H覆盖度从而提高CH_(4)的产生,最高的CH_(4)法拉第效率(FE_(CH_(4)))达到52%,相应的分电流密度为±337 m A cm±2.另一方面,合成了银掺杂的铜催化剂,其中掺杂的银用以产生CO,以进一步提高催化剂表面的*CO覆盖度.该催化剂二氧化碳电还原的选择性变成了C_(2)产物为主,最高C_(2)产物的法拉第效率(FE_(CH_(4)))达到79%,相应的分电流密度为±421 m A cm±2.不仅如此,在这两种催化剂上,CH_(4)与C_(2)产物的分电流密度仍然保持良好的线性关系.本文工作揭示了CH_(4)与C_(2)产物产率的线性关系,以及反应中间分子的调控策略,为电催化二氧化碳还原为不同的产物提供了参考.

摘要：为旋转地解决的分子的系列的任务的一个图形地面向的交互节目被设计了。由组织的程序函数光谱以第二个差别原则，和 graphing 排队光谱在选择的组的一张工具条图的紧张对频率，由颜色或线类型区分了。这允许在观察光谱埋葬的常规模式的容易的察觉。而且，它为帮助在包括一个 LoomisWood 看法光谱任务。作为一个例子，节目在在氦气体缓冲的打印机控制语言 3 的分泌物分配生产的分子的光谱被使用，它可以属于几种。结果建议节目在任务和分子的系列的分析高度有效、相当有用，特别那些对称的最高的、稍微不对称的顶和线性分子。这个程序的精确性和效率将多半在处理分子的系列保证它的宽应用程序。

摘要：在各类CO_(2)还原电催化剂中,锡基材料获得了研究人员的广泛关注,但其总体催化性能仍然受催化剂电极的组成,形貌和结构的限制。在本研究中,我们利用Sn低熔点(m.p.232℃)的特性,在聚多巴胺碳化的同时实现Sn的熔化与再结晶,合成了由氮掺杂碳层网络分散的异质结构Sn/SnO_(2)纳米颗粒自支撑电极(Sn/SnO_(2)@NC)。氮掺杂碳层网络有利于电子的富集,可提高催化剂电极的导电性,防止超细纳米粒子的团聚,并保护其不在电解液中溶解。在CO_(2)饱和的0.5 mol·L^(-1) NaHCO_(3)水溶液中,所制备Sn/SnO_(2)@NC电极与没有碳层网络包覆的电极相比,其CO_(2)还原催化性能得到了很大的提高。该Sn/SnO_(2)@NC电极在-0.9 V(***)的电解电压下,电流密度为17 mA·cm^(-2),甲酸盐产物的选择性为83%。通过偶联该CO_(2)还原催化电极与商品化RuO2催化剂作为水氧化阳极,可实现持续的CO_(2)/H_(2)O电解。此外,以Sn/SnO_(2)@NC为阴极,Zn箔为阳极,我们还构建了可充放电的水系Zn-CO_(2)电池。该电池的输出开路电压为1.35 V,峰值功率密度为0.9 mW·cm^(-2)。本研究为高性能CO_(2)还原催化剂的设计提供了新的思路,同时可充放电Zn-CO_(2)电池的构建为绿色能源转换和存储系统提供了新的方案。

摘要：The welding fixtures are the most important devices for an auto body welding assembly line. The current special fixtures used by many automotive manufactures are only fit for one or several specific welding processes, and the dimensional problem in the circle due to several variation sources accumulation has no adjustment. The active error compensating welding fixture system for auto body is designed and manufactured. The detecting model, coordinate transformation model, and adjusting model based on auto body coordinate system are presented. The dowel pin modular design is adopted in the structure of the fixture to suit different workpieces with some similar characteristics. The online detection and adaptive control system using eddy current sensors and adaptive adjusting devices is analyzed. Three kinds of the left rear wheel covers SGM60 are selected to test workpieces of the developed system, and the active error compensating experiments are performed in the lab for many times. Test results show the validity of mechanism reconfigurations, on-line detections and error compensations of the developed welding fixture.

摘要：A compact bi-directional （BiDi） triplexer using grating-assisted multimode interference （MMI） coupler is proposed based on silicon nanowire *** of the high index contrast between silicon and silicon dioxide, the size of the structure is greatly reduced with a footprint of 2.5×911 （μm）. Asymmetrical ports are introduced in the MMI structure to satisfy the bandwidth requirements of the industrial standards ITU-T G.983.3-dB bandwidths of 100, 22, and 15 nm are obtained for the wavelengths of 1 310, 1 490, and 1 550 nm, respectively. The device can be readily fabricated using a commercial CMOS process.

摘要：BACKGROUND: With the social and economic development and aging, coronary heart disease has become the primary cause of death endangering human life and health, while cardiovascular intervention (especially stenting) in the treatment of cardiovascular disease is at a growing status. OBJECTIVE: To describe the development, research progress and latest clinical application of heart interventional materials as well as advantages and disadvantages of biodegradable stents, and meanwhile to prospect for its future development and improvement. METHODS: A computer-based online search was conducted in PubMed for English language publications from January 1999 to April 2014 using the key words of "stent, scaffold, bioabsorbable, bioresorbable, biodegradable, biocompatibility, material properties" in English. RESULTS AND CONCLUSION: The new fully biodegradable stents are considered as another major progress in the cardiac intervention, which brings a new gospel for patients with coronary heart disease. In the initial stage of implantation, biodegradable stents exhibit the same mechanical support as bare metal stents; after implantation, anti-proliferative drugs are released to prevent thrombosis and restenosis, and the stent is completely degraded within a specified period, which significantly reduces the late-stage and very late-stage thrombosis and the risk of in-stent restenosis. However, long-term safety and efficacy of biodegradable stents need further studies. Innovation of stent design and materials science is the key to overcome the current shortcomings of biodegradable stents.