摘要：针对汽车外覆盖件的特点,运用Autoform对汽车翼子板进行工艺数值模拟的回弹补偿,将补偿后的数值进行光学检测以及CAE回弹仿真分析,得到优化后的模具型面,利用优化后的模具型面进行模具设计。实践证明,在保证车身外覆盖件成形质量的同时,提高了车身外覆盖件回弹补偿的精确度。

摘要：以北戴河西海滩为例,测量了养护后的海滩演变和波浪数据,估算了海滩侵蚀量及有效波高对岸滩侵蚀的贡献度。结果表明,养滩后海滩整体呈侵蚀趋势,最大侵蚀高度达到1.7 m。有效波高对海滩侵蚀量的累积影响呈指数分布。重现频数较低的大波浪(有效波高>0.6 m)作用虽能引起更大的海滩侵蚀,但是对岸滩总侵蚀量的累积贡献仅为25%,而波高为0.3~0.6 m的中小波浪贡献度可达75%。该研究可为维护人工海滩质量和养后海滩演变预测提供参考。

摘要：Better understanding of electrochemical reaction behaviors of hydrazine electrooxidation at metal phosphides has long been desired and the optimization of reaction kinetics has been proved to be ***,the dehydrogenation kinetics of hydrazine electrooxidation at Ni_(2)P is adjusted by Co as the(Ni_(0.6)Co_(0.4))_(2)P catalyzes HzOR effectively with onset potential of–45 mV and only 113 mV is needed to drive the current density of 50 mA cm^(‒2),showing over 60 mV lower than Ni_(2)P and Co_(2)*** also delivers the maximum power density of 263.0 mW cm^(-2) for direct hydrazine fuel *** experimental results revealed that Co doping not only decreases the adsorption energy of N_(2)H_(4) on Ni sites,lowering the energy barrier for dehydrogenation,but also acts as the active sites in the optimal reaction coordination to boost the reaction *** work represents a breakthrough in improving the catalytic performance of non‐precious metal electrocatalysts for hydrazine electrooxidation and highlights an energy‐saving electrochemical hydrogen production method.

摘要：介绍一种X波段频率合成器的设计方案,此方案将直接式和数字锁相相结合,完成快速捷变功能。并对其进行了分析、讨论,最后给出研制结果。

摘要：热等静压炉约束框架,主要在容器加压时起到约束容器两端,承载容器内部产生的轴向力的作用。为了优化框架结构质量及其应力分布情况,利用CAD软件的静力学分析功能,对不同尺寸构件进行仿真计算,得到了最优尺寸参数。结果表明:框架厚度为220 mm、宽度为740 mm、端部宽度为390 mm、四角倒角为140 mm时,框架质量和应力分布最优,均可满足设计需求。

摘要：原位治理技术在黑臭水体治理工程中应用广泛,但存在治理效果维持时间短,甚至引发二次黑臭的问题。为深入打好黑臭水体治理攻坚战,维护来之不易的治理成效,本研究深入分析几种常见的原位治理技术,归纳总结原位治理技术在应用中存在的局限性或应用误区,点明实施原位修复技术的前提和基础是彻底的控源截污和内源治理,明确各原位治理技术的适用条件,并有针对性地给出对策建议。研究成果可为县级、农村黑臭水体治理工作提供借鉴,推动黑臭水体治理工作向生态、安全、高质量方向发展。

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.

摘要：吸附/吸收式空气取水技术操作简易、取水能耗低,是缓解淡水资源短缺的有效措施。本文对吸附/吸收式空气取水技术近年来的研究进展进行了系统综述,介绍了吸附/吸收式空气取水技术的基本原理和主要材料类别,总结了吸附/吸收设备的材料放置结构、设备运行方式和应用场景。吸附/吸收材料包括传统的多孔结构材料、吸湿盐和新型有机空气取水材料。目前,各类研究已在提高材料的吸附性能、拓宽材料应用范围以及减少吸水-释水所需能耗方面取得重大进展。然而,吸附/吸收材料仍存在机械性能较差和无法型材化等问题,亟待后续更加深入的研究。吸附/吸收设备中的材料可通过平铺放置、中心轴放置、褶皱放置等多种结构形式进行空气取水应用,设备可采用一天一循环或一天多循环的模式运行。除了直接收集液态水以外,吸附/吸收式空气取水设备还可用于培育生态农场,为缓解地区淡水资源匮乏和食物短缺等问题提供了思路。

摘要：We present a high-definition （HD） 3D laparoscopic system including a dual channel optical system, two cameras, a camera control unit （CCU）, and an HD 3D monitor. This laparoscopic system is capable of outputting dual high-definition videos and providing vivid 3D images. A modified pinhole camera model is used for camera calibration and a new method of depth measurement to improve precision. The average error of depth measurement measured by experiment （about 1.13 mm） was small in proportion to the large range in distance of the system （10-150 mm）. The new method is applicable to any calibrated binocular vision system.

摘要：Direct carbon solid oxide fuel cells(DC-SOFCs)are promising,green,and efficient power-generating devices that are fueled by solid carbons and comprise all-solid-state *** suitable anode materials for DC-SOFCs is a substantial scientific *** we investigated the use of La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3)-δ−Ce_(0.8)Gd_(0.2)O_(1.9)(LSCM−GDC)composite electrodes as anodes for La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3)-δelectrolyte-based DC-SOFCs,with Camellia oleifera shell char as the carbon *** LSCM−GDC-anode DC-SOFC delivered a maximum power density of 221 mW/cm^(2) at 800℃ and it significantly improved to 425 mW/cm^(2) after Ni nanoparticles were introduced into the LSCM−GDC anode through wet *** microstructures of the prepared anodes were characterized,and the stability of the anode in a DC-SOFC and the influence of catalytic activity on open circuit voltage were *** above results indicate that LSCM–GDC anode is promising to be applied in DC-SOFCs.