A comprehensive analysis and comparison between vacuum and electric oven drying methods on Chinese saffron (Crocus sativus L.)

Food Science and Biotechnology - The red stigmas of saffron are one of the most expensive spices in the world and serve as a traditional Chinese medicine. More saffron has been cultivated in China,...     

三维地震勘探技术在新疆某矿区煤层露头预测中的应用

为详细分析新疆某矿区的煤层露头情况，采用三维地震勘探方法进行煤层露头预测。利用先进的数字地震仪器设备采集野外资料，根据“高信噪比、高分辨率、高保真度”的原则进行了资料处理。根据煤层底板发育的反射波与新生界底界面不整合面的相交位置，并结合地震反演剖面进行煤层露头信息解译，解译结果得到了钻探结果的有效验证。研究表明：利用三维地震勘探技术在该矿区进行煤层露头预测具有可行性。     

Effect of processing additive 1,8-octanedithiol on the lifetime of PCPDTBT based Organic Photovoltaics

The effect that processing additives have upon the lifetime of PCPDTBT-based OPVs has been investigated. The results show conclusively that whilst ODT processing additive enhances the initial performance of PCPDTBT:PCBM OPVs, it is detrimental to their long term performance, when measured under light soaking at 1 Sun of irradiance. Results are shown for both encapsulated and non-encapsulated devices. Topographical and morphological measurements made using AFM and small- and wide-angle X-ray scattering of active layers show that there are greater morphological changes of devices fabricated with the 1,8-octanedithiol upon light soaking, revealing a relatively venerable morphology of the active layer processed with the additive, when subject to light soaking.     

Analysis of the internal friction spectrum of TiNiCu alloy

The internal friction spectra of TiNiCu shape memory alloy (SMA), which involves thermoelastic martensitic transformation, can be divided into three different terms: intrinsic, transitory and phase transition. In this paper, the damping behavior during the reverse martensitic transformation in Ti₅₀Ni₂₇Cu₂₃ SMA has been investigated using dynamic mechanical analyzer instrument. The internal friction spectra of Ti₅₀Ni₂₇Cu₂₃ SMA have been analyzed quantitatively and divided into intrinsic and transitory contributions using an iterative method. The internal friction spectra with different oscillation frequency have been predicted based on the quantitative analysis.     

Slow Light Based on Coherent Population Oscillation in Quantum Dots at Room Temperature

We develop a model for slow light based on the coherent population oscillation of quantum dots at room temperature. With the absorption dip and corresponding variation of the refractive index due to the coherent population beating induced by the pump and probe signal, quantum dots can be used as a slow-light medium. Our theoretical model matches the experimental results very well. We also experimentally and theoretically demonstrate that both the forward-bias injection current and reverse-bias voltage can change the group index in a semiconductor quantum-dot waveguide. Our results indicate that quantum-dot devices can be potentially used as electrically and optically controllable slow light devices     

A high time resolution multi—gap resistive plate chamber

Research on a single cell Multi-gap Resistive Plate Chamber(MRPC) was carried out for the Time of Flight detector(TOF) R and D of the STAR experiment .The property of the single chamber was tested with the test beam facility T10 at CERN in Geneva,The MRPC was scanned with the test beam to get the efficiency and time resolution at different position of the active area.The HV plateau was also measured.The time resolution is 65 ps which satisfies the requirement of STAR,The working mechanism of the MRPC is also explained.     

Improving Erosion Resistance of Plasma-Sprayed Ceramic Coatings by Elevating the Deposition Temperature Based on the Critical Bonding Temperature

Interlamellar bonding within plasma-sprayed coatings is one of the most important factors dominating the properties and performance of coatings. The interface bonding between lamellae significantly influences the erosion behavior of plasma-sprayed ceramic coatings. In this study, TiO₂ and Al₂O₃ coatings with different microstructures were deposited at different deposition temperatures based on the critical bonding temperature concept. The erosion behavior of ceramic coatings was investigated. It was revealed that the coatings prepared at room temperature exhibit a typical lamellar structure with numerous unbonded interfaces, whereas the coatings deposited at the temperature above the critical bonding temperature present a dense structure with well-bonded interfaces. The erosion rate decreases sharply with the improvement of interlamellar bonding when the deposition temperature increases to the critical bonding temperature. In addition, the erosion mechanisms of ceramic coatings were examined. The unbonded interfaces in the conventional coatings act as pre-cracks accelerating the erosion of coatings. Thus, controlling interlamellar bonding formation based on the critical bonding temperature is an effective approach to improve the erosion resistance of plasma-sprayed ceramic coatings.     

全局优化算法自适应模拟退火-遗传算法的研究

对模拟退火法和遗传算法作了简要叙述,并深入分析了模拟退火法和遗传算法的寻优特性,指出了模拟退火法存在的不足及遗传算法的优良特性,从而引入了自适应模拟退火-遗传算法,并定性分析了该算法的可行性。     

电磁场数值计算方法——等效磁网络方法中参数的求解

详细分析了电磁场数值计算方法——等效磁网络方法。简要叙述了等效磁网络方法的基本原理,给出了建立等效磁阻模型及等效磁网络模型的方法;首次由电磁场基本原理推导了等效磁网络方法中的重要参数,为等效磁网络方法的进一步推广应用奠定了理论基础。     

信息系统数据交换技术分析

数据交换是影响企业信息化管理发展的主要因素之一。它的目标是在异构环境(松散耦合、数据格式不同、跨平台、跨地域的分布环境)中实现数据的共享,从而有效地利用资源,提高整个信息系统的性能,加快信息系统之间的数据流通,实现数据的共享和集成。电力企业体系庞大,相关信息系统交互频繁,因此如何保证系统间的数据交换方便、快捷、安全、可靠执行,是电力企业信息部门的重要研究课题。本文以实现异构环境中数据交换为目标,详细分析论述了现有数据交换技术,并综合电力企业实际情况提出异构数据交换实现方案,对电力企业系统数据交换平台建设具有一定的参考价值。