影视剧显示的大数据技术

大数据无疑是2013年IT业内最热的词.厂商热推,媒体热炒,仿佛不谈大数据,不推大数据,不用大数据,就没有了未来.当IT业界正在爆炒大数据的时候,影视圈的导演和主角们自然也不甘寂寞,他们雄赳赳、气昂昂地投身到这场轰轰烈烈的造星运动之中.本文对英剧《黑镜》、电影《点球成金》和美剧《疑犯追踪》中的大数据元素进行了分析,体现了大数据的无穷魅力,展望了大数据广泛的应用前景.     

Porous Cu(I) Triazolate Framework and Derived Hybrid Membrane with Exceptionally High Sensing Efficiency for Gaseous Oxygen

Phosphorescent complexes of precious metal ions are widely studied as optical sensing materials for molecular oxygen. Combining the advantages of luminescent complexes and porous matrixes, porous coordination polymers show great potential for oxygen‐sensing, although their sensitivity, requirement of precious metal, and device fabrication remain challenging issues. In this work, the photoluminescence and oxygen‐sensing properties of the porous Cu(I) triazolate framework [Cu(detz)] (MAF‐2, Hdetz = 3,5‐diethyl‐1,2,4‐trizole) is studied in detail, which shows high chemical stability in moisture and water, very long phosphorescent lifetime (116 μs) and large Stokes shift (14 562 cm^?1), as well as considerable oxygen permeability (1.7 × 10^?11 mol cm^?1 s^?1 bar^?1) at ambient conditions, giving rise to exceptionally high luminescence quenching efficiency of 99.7% at 1 bar O₂ (I ₀/I ₁₀₀ = 356) with a perfectly linear Stern‐Volmer plot (K _SV = 356 bar^?1, R ² = 0.9998), fast response and good reversibility. Further, a counter‐diffusion crystal‐growth method was developed to fabricate MAF‐2 thin films protected by silicone rubbers as the first example of soft membrane oxygen sensor based on coordination polymer or metal‐organic framework, which exhibited extraordinary oxygen‐sensing performance (limit of detection = 0.047 mbar) and outstanding mechanical property, as well as outstanding chemical stability even in an acidic atmosphere.     

A Bi‐Lineage Conducive Scaffold for Osteochondral Defect Regeneration

Because cartilage and bone tissues have different lineage‐specific biological properties, it is challenging to fabricate a single type of scaffold that can biologically fulfill the requirements for regeneration of these two lineages simultaneously within osteochondral defects. To overcome this challenge, a lithium‐containing mesoporous bioglass (Li‐MBG) scaffold is developed. The efficacy and mechanism of Li‐MBG for regeneration of osteochondral defects are systematically investigated. Histological and micro‐CT results show that Li‐MBG scaffolds significantly enhance the regeneration of subchondral bone and hyaline cartilage‐like tissues as compared to pure MBG scaffolds, upon implantation in rabbit osteochondral defects for 8 and 16 weeks. Further investigation demonstrates that the released Li+ ions from the Li‐MBG scaffolds may play a key role in stimulating the regeneration of osteochondral defects. The corresponding mechanistic pathways involve Li+ ions enhancing the proliferation and osteogenic differentiation of bone mesenchymal stem cells (BMSCs) through activation of the Wnt signalling pathway, as well as Li+ ions protecting chondrocytes and cartilage tissues from the inflammatory osteoarthritis (OA) environment through activation of autophagy. These findings suggest that the incorporation of Li+ ions into bioactive MBG scaffolds is a viable strategy for fabricating bi‐lineage conducive scaffolds that enhance regeneration of osteochondral defects.     

Rate adaptive resource allocation in orthogonal frequency division multiple access system using multi‐objective immune algorithm

Rate adaptive downlink resource allocation in orthogonal frequency division multiple access system is a constraint optimization problem, which is to maximize the minimum data rate of the user subject to constraint that total power cannot exceed a given value. How to handle the constraint is a key issue for constrained optimization problem. Different with the available schemes on constraint handling, the proposed algorithm converts the constraint into an objective. Then, the resource allocation is combined into a multi‐objective optimization problem. An improved multi‐objective optimization algorithm based on artificial immune system is proposed to solve it. The simulation results show that, compared with previous schemes, the proposed algorithm performs remarkable improvement in sum capacity. Copyright © 2013 John Wiley & Sons, Ltd.     

一种精确测量AC-DC电源管理类芯片的方法

对于AC-DC电路测试,圆片测试(CP)一般采用开环测试的方法,测试项目较少,从而使CP的测试时间大大减少,提高了测试效率以及测试产能。CP测试的目的是测试基准电压以及输出波形等参数,并对相应参数进行工艺上的修调,使得这些参数达到中心值,保证芯片基本功能的准确;但CP测试并不是应用环境下的芯片状态,所以当AC-DC电路进行成品测试(FT)的时候,通过模拟芯片的应用环境来测试芯片在应用端的参数,从而确保芯片在工作环境中能正常应用,达到检测芯片的目的。主要介绍了AC-DC电路在闭环应用环境下各项参数的测试方法,确保电路功能的稳定性以及可靠性。     

香蕉酸乳发酵工艺的研究

研究了香蕉酸乳的发酵工艺。将香蕉打浆后与牛奶调配，接种乳酸菌发酵制成凝固型香蕉酸乳。研究表明，香蕉去皮后热烫8-10min，投入到等量含质量浓度为10mg/L的Na2S2O5与质量分数为0.5%柠檬酸的混合液中打浆，可有效防止香蕉果肉的褐变。香蕉酸乳的最佳配方：脱酯乳粉质量分数为3%，全脂乳粉质量分数为10%，香蕉果肉质量分数为15%，蔗糖质量分数为7%，乙基麦芽酚质量浓度为20mg/L，以1：1比例接种保加利亚乳杆菌和嗜热链球菌混合发酵剂（质量分数为5%），在42℃下发酵5h，及4-5℃下冷藏12-20h。所得产品凝乳结实，口感细腻，酸甜适口，香蕉味、酸乳味协调、独特。     

光伏发电仿真培训系统的开发与应用

以光伏发电为代表的新能源在国家的大力扶持下成为了热门的研究对象,但是随着光伏发电技术的发展,出现了专业人员短缺的现象。国内外的仿真系统平台大多功能单一且不能全面地培训技术人员,更多依赖于仿真系统与书本知识的结合,加上传统的培训方式周期长,效果差,因此开发了光伏发电仿真培训系统。该仿真培训系统可以快速、高效地进行专业人员的培训,具有监控、远程网络培训、操作票模拟、正常/异常工况演示、实操考评、工况保存调取等功能,提高了培训效率,改善了培训质量,并在教学试验阶段得到了较好的结果。     

合成语音检测方法的研究现状及展望

随着语音诈骗事件的发生, 自动说话人验证系统已被广泛应用。传统的检测合成语音的方法包括利用频谱信息、倒谱系数特征以及动态声学特征等。随着机器学习的发展, 深度学习算法也被应用于合成语音检测且取得了不错的成果。介绍了几种检测方法的基本原理及部分研究成果, 并对以后的发展方向进行了展望。     

美国政府激发企业创新活力的经验做法与启示建议

美国是当今世界科技最发达的国家,其科技投入总量稳居世界第一。美国政府曾先后出台《拜杜法案》和《史蒂文森-怀特勒创新法案》,有效推动了科技成果的转化应用,其科技发展资金来源呈企业主导特征。美国还通过加强政策引导、实施税收优惠、拓宽投融资渠道、科技人才培育引进、科技创新柔性监管等措施,鼓励企业技术创新,促进产学研交流合作,引导知识和技术向企业转移,有效激发了企业的创新活力。参考美国的经验做法并结合我国实际情况,提出了激发我国企业创新活力的政策建议：创新研发优惠方式,扩大税收激励范围;以市场化运作模式,提高科技成果转化效率;强化STEM教育战略地位,吸引国际STEM人才;提升科研人员基本工资待遇,增强研发队伍稳定性;拓宽监管沙盒参与主体,适当精简政策法规。     

鱼油生理活性物质EPA和DHA分离进展

报导了鱼油中生理活性物质EPA和DHA分离方法及其进展，重点讨论了具有工业化前景的超临界CO2分离法，介绍了此领域连续萃取分离的成就，给出了作者进行连续萃取分离的试验结果。