Broad spectral response photosensitive organic field-effect transistors realized by the hybrid planar-bulk heterojunction composed of three molecules with complementary optical absorption

Photodetectors have a growing number of diverse applications in both military and civilian use, and improving their response bandwidth is of great importance. Broad spectral response photosensitive organic field-effect transistors (PhOFETs) are realized by adopting hybrid planar-bulk heterojunction (HPBHJ) as the active structure that containing three molecules with complementary optical absorption. PhOFETs based on the HPBHJ composed of 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA), chloroaluminum phthalocyanine (AlClPc) and C₆₀, and SiO₂ as the gate dielectric exhibit photo response in the broadband wavelength range of 300–850 nm. At an incident optical intensity of 0.07 mW/cm², the mean photoresponsivity and uniformity factor were 0.40 A/W and 0.79, respectively. Furthermore, by replacing SiO₂ gate dielectric with polyvinyl alcohol (PVA), the device performance could be further improved, the mean photoresponsivity was increased to 2.44 A/W. The physical origin of the performance improvement is discussed.     

汶川地震灾区部分城镇的房屋震害分析

“5·12”汶川地震山移河堵,四川省震害灾区的人民经受了极大的灾害摧残,笔者就都江堰市、彭州市区及有关城镇主要房屋建筑类型的震害现象,进行粗略分类,并进行初浅的原因分析。天灾难御,但我们可从生死灾难中振醒,从技术、材料、工艺、管理等方面反思而应有所提高。     

Assessment of quality changes in frozen sardine (Sardina pilchardus) by fluorescence detection

The formation of fluorescent compounds was tested as a quality assessment during the frozen storage of sardine at −18°C (up to 24 mon) and at −10°C (up to 120 d). The fluorescence ratio between two excitation/emission maxima (393/463 and 327/415 nm) was studied in the aqueous (δF _aq) and organic (δF _or) extracts after Bligh and Dyer extraction of the white muscle. Fluorescence results were compared to common quality indices [total volatile base-nitrogen (TVB-N); conjugated dienes; thiobarbituric acid index (TBA-i); and free fatty acids (FFA)]. δF _aq showed good correlations with storage time (r=0.80 and r=0.72 at −18 and −10°C, respectively) and TBA-i (r=0.92 and r=0.81). Principal-component analysis grouped δF _aq with quality indices that are sensitive for the assessment of fish damage during frozen storage at both temperatures (TBA-i and FFA at −18°C; BVT-N, TBA-i, and FFA at −10°C). According to these results, fluorescence detection of interaction compounds in the aqueous phase can provide an accurate method to assess quality differences during frozen storage of fish.     

苯乙烯-马来酸酐接枝预聚物对PS版光敏涂层性能的影响

讨论了３ 种苯乙烯马来酸酐预聚物的结构和用量对 Ｐ Ｓ 版光敏涂层性能的影响。结果得出, 在相同用量情况下,苯乙烯马来酸酐接枝 Ｐ Ｅ Ｔ Ａ 预聚物（ Ｓ Ｍ Ｐ） 对涂层感度、显影性等性能的影响最显著。     

食品市场职业打假人权利的法律边界

聚焦食品市场,从职业打假案件的诉讼现状入手,总结分析了目前理论与实务中关于职业打假行为存在的问题与争议,讨论了职业打假人知假买假的权利保护限制必要性,并尝试从多个层面对其职业打假行为进行引导规制,如明确职业打假人的法律地位、引导打假行为正当化规范化等。     

汶川地震拱桥震害统计简析

汶川地震拱桥震害明显,且震害随桥梁规模、连孔情况的不同而发生变化,故对两种类型进行统计归纳,得到相关统计规律.     

空冷型自动追光百叶帘式光伏窗的应用研究

简述了国内外光伏技术在建筑窗体上的研究及应用现状,设计了一种自动追光百叶帘式光伏窗,将薄膜太阳能光伏片取代传统百叶帘中的百叶并内置于中空双层窗中,调节室内采光量的同时还能获得电能收益。通过光敏元件的控制使其具有追踪太阳光的能力,光伏百叶倾角的调节过程将形成扰流,加速空冷散热,进而提高光电转换效率。此外,利用不同的工作模式将散热量与室内外进行热量交换,进一步提升了光伏的发电效率,极大降低了室内建筑能耗,在建筑环境与能源应用领域拥有着广大的市场前景。     

液晶屏背光灯的人性化控制

本文主要讨论了如何利用光敏元件对光强度进行检测,并参照强度检测的结果对光的强度进行分类,最终利用PWM波实现对液晶屏背光灯进行人性化控制。     

“一追双控管理”降低欠注井新增速度简述

文章主要介绍了降低欠注井新增速度,"一追双控管理"模式的提出、实施及成效,用事实证明了欠注井治理"防要大于治"的重要性。通过实施"一追、双控"管理模式,临盘采油厂欠注井新增速度达到了近四年以来最低新增水平,欠注井总数也大幅下降,达到了近5年以来最低水平。     

Elman's recurrent neural network applications to condition monitoring in nuclear power plant and rotating machinery

The purpose of this study is to show the capability of recurrent neural nets (RNN) for condition monitoring and diagnosis in nuclear power plant systems and rotating machinery. In the first application, the study addresses the use of RNN for detecting anomalies introduced from the simulated power operation of a high-temperature gas cooled nuclear reactor. In the second, it is used to detect the motor bearing damage using a coherence function approach, which is defined between the motor current and vibration signals, for induction motors. Hence, the high performance of Elman's RNN was shown by means of two different applications.