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Development and road performance of clear asphalt with high transparency and adhesion

《结构与土木工程前沿（英文）》 2023年第17卷第2期页码 238-255 doi: 10.1007/s11709-022-0898-x

摘要： Clear asphalt (CA) currently used in light-colored asphalt mixtures (LCAM) exhibits poor transparency and adhesion. Therefore, a highly transparent CA (HCA) modified using a silane coupling agent (KH550) was prepared. Furthermore, LCAM was prepared by mixing CA and limestone aggregates. The properties of the HCA and ordinary CA (OCA) were characterized using conventional asphalt tests, optical tests, pull-off tests, ultraviolet aging tests, dynamic shear rheometry, Fourier-transform infrared spectroscopy, differential scanning calorimetry, and scanning electron microscopy. Whereas Marshall, moisture resistance, wheel tracking, trabecular bending, and British pendulum tests were employed for the LCAM. The transmittance and spectral reflectance of the HCA were 123.30 and 3.74 times greater than those of the OCA, respectively. The complex modulus and viscosity-aging index of the HCA were 48% and 53% less than those of the OCA, respectively. After modification with KH550, the Marshall stability ratio, tensile strength ratio, and flexural strain of the HCA-prepared LCAM increased by 12.92%, 25.06%, and 23.90%, respectively. However, the rutting resistance of the HCA-prepared LCAM was 14.3% less than that of the OCA-prepared LCAM. The comprehensive performances of the HCA and HCA-prepared LCAM were 49.2% and 10.3% greater than those of the OCA and OCA-prepared LCAM, respectively, indicating a high application value in the future.

关键词： light-colored asphalt pavement orthogonal test road performance spectral reflectance silane-coupling agent

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中国海透明度卫星遥感监测

何贤强,潘德炉,黄二辉,赵艳玲

《中国工程科学》 2004年第6卷第9期页码 33-37

摘要：

传统的海水透明度监测方法是利用船舶等进行实测。由于船测本身固有的缺点，满足不了当前对海洋要素大范围、快速、实时监测的需求，必须结合卫星、航空遥感等手段，进行立体监测。文章以海水透明度为突破口，开展中国海透明度的卫星遥感监测。结果表明，利用卫星遥感技术反演海水透明度精度可以达到相对平均误差22.6%，在中高透明度海区，具有更高的反演精度。利用建立的海水透明度遥感反演算法和SeaWiFS卫星遥感数据，制作了两年的中国海透明度遥感产品数据集，并利用该产品，对中国海透明度的时空变化规律进行了遥感分析。

关键词：中国海透明度遥感监测

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poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) electrodes with enhanced conductivity and transparency

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 206-216 doi: 10.1007/s11705-022-2203-x

摘要： Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is an important organic electrode for solution-processed low-cost electronic devices. However, it requires doping and post-solvent treatment to improve its conductivity, and the chemicals used for such treatments may affect the device fabrication process. In this study, we developed a novel route for exploiting ultrafast lasers (femtosecond and picosecond laser) to simultaneously enhance the conductivity and transparency of PEDOT:PSS films and fabricate patterned solution-processed electrodes for electronic devices. The conductivity of the PEDOT:PSS film was improved by three orders of magnitude (from 3.1 to 1024 S·cm^–1), and high transparency of up to 88.5% (average visible transmittance, AVT) was achieved. Raman and depth-profiling X-ray photoelectron spectroscopy revealed that the oxidation level of PEDOT was enhanced, thereby increasing the carrier concentration. The surface PSS content also decreased, which is beneficial to the carrier mobility, resulting in significantly enhanced electrical conductivity. Further, we fabricated semitransparent perovskite solar cells using the as-made PEDOT:PSS as the transparent top electrodes, and a power conversion efficiency of 7.39% was achieved with 22.63% AVT. Thus, the proposed route for synthesizing conductive and transparent electrodes is promising for vacuum and doping-free electronics.

关键词： PEDOT:PSS ultrafast laser transparent electrode ST-PSCs patterning

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下一代无线网络中基于区块链的透明数据管理 Article

沈学民, 刘栋骁, 黄橙, 薛靓, 尹涵, 庄卫华, Rob Sun, Bidi Ying

《工程（英文）》 2022年第8卷第1期页码 74-85 doi: 10.1016/j.eng.2021.10.002

摘要：

未来第六代无线网络（6G）需要依赖丰富的数据实现网络智能化和自动化。在这种情况下，考虑到数据的异构性和动态性，基于区块链的去中心化的数据管理（DM）被认为是实现跨网络域的透明数据操作的潜在解决方案之一。然而，在6G网络中，不断增加的数据量和严格的数据隐私保护需求为平衡基于区块链的去中心化数据管理的透明、效率以及隐私需求带来巨大的技术挑战。本文中，首先，我们探索区块链的共识协议和可扩展机制，并讨论区块链构架下如何管理利益相关者的角色；其次，我们探讨针对数据管理利益相关者的认证与授权需求；再次，我们归类数据管理的隐私需求，并研究基于区块链的协同数据处
理机制；随后，我们从上述三个方面探讨面向6G的基于区块链数据管理的研究问题和潜在解决方案；最后，我们对本文进行总结并讨论未来的研究方向。

关键词：区块链数据管理去中心化透明隐私