机器人流程自动化(Robotic Process Automation,RPA)是当今的研究热点之一,对网页元素的拾取和自动化是RPA的重要功能之一。RPA通过使用浏览器扩展向网页中注入脚本程序以处理网页,使用网页元素定位路径定位到目标节点进行自动化操作,...机器人流程自动化(Robotic Process Automation,RPA)是当今的研究热点之一,对网页元素的拾取和自动化是RPA的重要功能之一。RPA通过使用浏览器扩展向网页中注入脚本程序以处理网页,使用网页元素定位路径定位到目标节点进行自动化操作,在源网页中存在跨域frame时,由于同源策略的限制,注入源网页的脚本无法获取到目标节点的DOM对象,导致无法生成网页元素定位路径,从而无法自动化。文中提出了一种基于浏览器扩展的RPA系统设计方案,该方案能够对跨域DOM进行拾取和自动化。该方案在处理包含第三方跨域frame的网页时,将其看作与源网页frame地位相等的frame进行处理,网页元素定位路径设计为包含frame的url和网页元素Xpath的形式,以实现跨域网页元素拾取和自动化的功能。实验结果表明,该方案能够有效地对包含跨域资源的网页进行拾取和自动化操作,且同时支持chrome,firefox等支持浏览器扩展的浏览器。展开更多
采用双溶剂溶胶-凝胶法制备了一系列BiFe 1-x Ni x O 3(BFNO,x=0.00、0.02、0.04、0.06、0.08)纳米粉。X射线衍射测试结果表明,利用溶胶-凝胶法制备的BFNO粉末样品为R3C三方相结构;扫描电子显微镜图像显示,随着Ni掺杂量增加,BFNO粉末的...采用双溶剂溶胶-凝胶法制备了一系列BiFe 1-x Ni x O 3(BFNO,x=0.00、0.02、0.04、0.06、0.08)纳米粉。X射线衍射测试结果表明,利用溶胶-凝胶法制备的BFNO粉末样品为R3C三方相结构;扫描电子显微镜图像显示,随着Ni掺杂量增加,BFNO粉末的晶粒尺寸减小;光电子能谱分析表明,BFNO中的Ni存在Ni 3+和Ni 2+两种价态,变价Ni离子作为光诱导电子和空穴的捕获位点,可以有效提高光生载流子的分离速率并降低复合速率;紫外-可见光吸收光谱分析表明,掺Ni的BiFeO 3粉末的吸收带边发生了红移,带隙呈减小趋势;磁性测量结果表明,随着Ni掺杂量的增加,BFNO铁磁性显著增强。在可见光照射下,通过BFNO纳米粉对刚果红溶液的光催化降解,分析了BFNO纳米粉的光催化活性,结果表明,随着Ni掺杂量的增加,BFNO光催化活性显著增强,Ni掺杂量为8%时样品的催化性能最强。光致发光实验表明,BFNO光催化活性增强可以归因于Ni掺杂效应导致的电子-空穴对复合效率的降低。展开更多
The Sidingheishan mafic-ultramafic intrusion is located in the eastern part of the Northern Tianshan Mountain, along the southern margin of the Central Asian Orogenic Belt in northern Xinjiang autonomous region of Chi...The Sidingheishan mafic-ultramafic intrusion is located in the eastern part of the Northern Tianshan Mountain, along the southern margin of the Central Asian Orogenic Belt in northern Xinjiang autonomous region of China. The Sidingheishan intrusion is mainly composed of wehrlite, olivine websterite, olivine gabbro, gabbro and hornblende gabbro. At least two pulses of magma were involved in the formation of the intrusion. The first pulse of magma produced an olivine-free unit and the second pulse produced an olivine-bearing unit. The magmas intruded the Devonian granites and granodiorites.An age of 351.4±5.8 Ma(Early Carboniferous) for the Sidingheishan intrusion has been determined by U-Pb SHRIMP analysis of zircon grains separated from the olivine gabbro unit. A U-Pb age of 359.2±6.4 Ma from the gabbro unit has been obtained by LA-ICP-MS. Olivine of the Sidingheishan intrusion reaches 82.52 mole% Fo and 1414 ppm Ni. On the basis of olivine-liquid equilibria, it has been calculated that the MgO and FeO included in the parental magma of a wehrlite sample were approximately10.43 wt% and 13.14 wt%, respectively. The Sidingheishan intrusive rocks are characterized by moderate enrichments in Th and Sm, slight enrichments in light REE, and depletions in Nb, Ta, Zr and Hf. The εNd(t) values in the rock units vary from +6.70 to +9.64, and initial87Sr/86Sr ratios range between 0.7035 and0.7042. Initial206Pb/204Pb,207Pb/204Pb and208Pb/204Pb values fall in the ranges of 17.23-17.91,15.45-15.54 and 37.54-38.09 respectively. These characteristics are collectively similar to the Heishan intrusion and the Early Carboniferous subduction related volcanic rocks in the Santanghu Basin, North Tianshan and Beishan area. The low(La/Gd)PMvalues between 0.26 and 1.77 indicate that the magma of the Sidingheishan intrusion was most likely derived from a depleted spinel-peridotite mantle.(Th/Nb)PMratios from 0.59 to 20.25 indicate contamination of the parental magma in the upper crust.Crystallization modeling methods suggest that the parental magma of the Sidingheishan intrusion was generated by flush melting of the asthenosphere and subsequently there was about 10 vol%contamination from a granitic melt. This was followed by about 5 vol% assimilation of upper crustal rocks. Thus, the high-Mg basaltic parental magma of Sidingheishan intrusion is interpreted to have formed from partial melting of the asthenosphere during the break-off of a subducted slab.展开更多
文摘机器人流程自动化(Robotic Process Automation,RPA)是当今的研究热点之一,对网页元素的拾取和自动化是RPA的重要功能之一。RPA通过使用浏览器扩展向网页中注入脚本程序以处理网页,使用网页元素定位路径定位到目标节点进行自动化操作,在源网页中存在跨域frame时,由于同源策略的限制,注入源网页的脚本无法获取到目标节点的DOM对象,导致无法生成网页元素定位路径,从而无法自动化。文中提出了一种基于浏览器扩展的RPA系统设计方案,该方案能够对跨域DOM进行拾取和自动化。该方案在处理包含第三方跨域frame的网页时,将其看作与源网页frame地位相等的frame进行处理,网页元素定位路径设计为包含frame的url和网页元素Xpath的形式,以实现跨域网页元素拾取和自动化的功能。实验结果表明,该方案能够有效地对包含跨域资源的网页进行拾取和自动化操作,且同时支持chrome,firefox等支持浏览器扩展的浏览器。
文摘采用双溶剂溶胶-凝胶法制备了一系列BiFe 1-x Ni x O 3(BFNO,x=0.00、0.02、0.04、0.06、0.08)纳米粉。X射线衍射测试结果表明,利用溶胶-凝胶法制备的BFNO粉末样品为R3C三方相结构;扫描电子显微镜图像显示,随着Ni掺杂量增加,BFNO粉末的晶粒尺寸减小;光电子能谱分析表明,BFNO中的Ni存在Ni 3+和Ni 2+两种价态,变价Ni离子作为光诱导电子和空穴的捕获位点,可以有效提高光生载流子的分离速率并降低复合速率;紫外-可见光吸收光谱分析表明,掺Ni的BiFeO 3粉末的吸收带边发生了红移,带隙呈减小趋势;磁性测量结果表明,随着Ni掺杂量的增加,BFNO铁磁性显著增强。在可见光照射下,通过BFNO纳米粉对刚果红溶液的光催化降解,分析了BFNO纳米粉的光催化活性,结果表明,随着Ni掺杂量的增加,BFNO光催化活性显著增强,Ni掺杂量为8%时样品的催化性能最强。光致发光实验表明,BFNO光催化活性增强可以归因于Ni掺杂效应导致的电子-空穴对复合效率的降低。
基金financially supported by the National Science Foundation of China (41402070, 41602082, 4170021021)China Geological Survey (DD20160346)
文摘The Sidingheishan mafic-ultramafic intrusion is located in the eastern part of the Northern Tianshan Mountain, along the southern margin of the Central Asian Orogenic Belt in northern Xinjiang autonomous region of China. The Sidingheishan intrusion is mainly composed of wehrlite, olivine websterite, olivine gabbro, gabbro and hornblende gabbro. At least two pulses of magma were involved in the formation of the intrusion. The first pulse of magma produced an olivine-free unit and the second pulse produced an olivine-bearing unit. The magmas intruded the Devonian granites and granodiorites.An age of 351.4±5.8 Ma(Early Carboniferous) for the Sidingheishan intrusion has been determined by U-Pb SHRIMP analysis of zircon grains separated from the olivine gabbro unit. A U-Pb age of 359.2±6.4 Ma from the gabbro unit has been obtained by LA-ICP-MS. Olivine of the Sidingheishan intrusion reaches 82.52 mole% Fo and 1414 ppm Ni. On the basis of olivine-liquid equilibria, it has been calculated that the MgO and FeO included in the parental magma of a wehrlite sample were approximately10.43 wt% and 13.14 wt%, respectively. The Sidingheishan intrusive rocks are characterized by moderate enrichments in Th and Sm, slight enrichments in light REE, and depletions in Nb, Ta, Zr and Hf. The εNd(t) values in the rock units vary from +6.70 to +9.64, and initial87Sr/86Sr ratios range between 0.7035 and0.7042. Initial206Pb/204Pb,207Pb/204Pb and208Pb/204Pb values fall in the ranges of 17.23-17.91,15.45-15.54 and 37.54-38.09 respectively. These characteristics are collectively similar to the Heishan intrusion and the Early Carboniferous subduction related volcanic rocks in the Santanghu Basin, North Tianshan and Beishan area. The low(La/Gd)PMvalues between 0.26 and 1.77 indicate that the magma of the Sidingheishan intrusion was most likely derived from a depleted spinel-peridotite mantle.(Th/Nb)PMratios from 0.59 to 20.25 indicate contamination of the parental magma in the upper crust.Crystallization modeling methods suggest that the parental magma of the Sidingheishan intrusion was generated by flush melting of the asthenosphere and subsequently there was about 10 vol%contamination from a granitic melt. This was followed by about 5 vol% assimilation of upper crustal rocks. Thus, the high-Mg basaltic parental magma of Sidingheishan intrusion is interpreted to have formed from partial melting of the asthenosphere during the break-off of a subducted slab.
