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Theoretical calculation of equilibrium Mg isotope fractionation between silicate melt and its vapor

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Acta Geochimica 2018年第5期37卷 655-662页

作者： Haiyang Luo Huiming Bao yuhong yang Yun Liu State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of SciencesGuiyang 550081 China University of Chinese Academy of Sciences Beijing 100049China Department of Geology and Geophysics Louisiana StateUniversity Baton Rouge LA 70803 USA Center for Lunar and Planetary Sciences Institute of Geochemistry Chinese Academy of SciencesGuiyang 550081 China

Isotope fractionation during the evaporation of silicate melt and condensation of vapor has been widely used to explain various isotope signals observed in lunar soils, cosmic spherules, calcium-aluminum-rich inclu- sions, and bulk compositions of planetary materials. During evaporation and condensation, the equilibrium isotope fractionation factor （α） between high-temperature silicate melt and vapor is a fundamental parameter that can con- strain the melt＇s isotopic compositions. However, equilib- rium a is difficult to calibrate experimentally. Here we used Mg as an example and calculated equilibrium Mg isotope fractionation in MgSiO3 and Mg2SiO4 melt-vapor systems based on first-principles molecular dynamics and the high- temperature approximation of the Bigeleisen-Mayer equation. We found that, at 2500 K, 625Mg values in the MgSiO3 and Mg2SiO4 melts were 0.141 ±0.004 and 0.143 ±0.003‰ more positive than in their respective vapors. The corresponding 626Mg values were 0.270 ± 0.008 and 0.274 ± 0.006‰ more positive than in vapors, respectively. The general α - T equations describing the equilibrium Mg α in MgSiO3 and Mg2SiO4 melt-vapor systems were： αMg（l）-Mg（g） = 1 ＋ 5.264×10^5/T^2 （1/m - 1/m＇） and αmg（l）-Mg（g） = 1 ＋ 5.340×10^5/T^2 （1/m - 1/m＇）, respectively, Where m is the mass of light isotope, ^25Mg or ^26Mg. These results offer a necessary parameter for mechanistic under- standing of Mg isotope fractionation during evaporation and condensation that commonly occurs during the early stages of planetary formation and evolution.

关键词： Equilibrium Mg isotope fractionation Forceconstant Structural optimization RPFR

3D Audio Coding Approach Based on Spatial Perception Features

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China Communications 2017年第11期14卷 126-140页

作者： Cheng yang Ruimin Hu Xiaochen Wang yuhong yang Maosheng Zhang Wei Chen National Engineering Research Center for Multimedia Sottware School of Computer Science Wuhan University Wuhan 430072 China School of Physics and Electronic Science Guizhou Normal University Guiyang 550001 China Hubci Key Laboratory of Multimedia and Network Communication Engineering Wuhan University Wuhan 430072 China Collaborative Innovation Center of Geospatial Technology Wuhan 430079 China

A new three-dimensional(3D) audio coding approach is presented to improve the spatial perceptual quality of 3D audio. Different from other audio coding approaches, the distance side information is also quantified, and the non-uniform perceptual quantization is proposed based on the spatial perception features of the human auditory system, which is named as concentric spheres spatial quantization(CSSQ) method. Comparison results were presented, which showed that a better distance perceptual quality of 3D audio can be enhanced by 5.7%~8.8% through extracting and coding the distance side information comparing with the directional audio coding, and the bit rate of our coding method is decreased of 8.07% comparing with the spatial squeeze surround audio coding.

关键词： 3D audio coding non-uniform perceptual quantization distance perceptual quality

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某市噪声作业工人职业健康检查结果分析

工业卫生与职业病 2024年第2期50卷 166-168页

作者：赵普杨玉红云中龙金凤巴彦淖尔市疾病预防控制中心内蒙古015000

收集2022年巴彦淖尔市辖区内职业健康检查机构上报的噪声作业工人职业健康检查个案结果进行统计分析,了解工人健康状况,为噪声作业人员的职业病防治提供基础依据。结果显示,9 036名噪声作业工人,听力损失检出率为6.4%,血压异常率为18.2%... 详细信息

收集2022年巴彦淖尔市辖区内职业健康检查机构上报的噪声作业工人职业健康检查个案结果进行统计分析,了解工人健康状况,为噪声作业人员的职业病防治提供基础依据。结果显示,9 036名噪声作业工人,听力损失检出率为6.4%,血压异常率为18.2%,心电图异常率为12.5%,听力损失检出率男性高于女性(χ^(2)=36.952,P<0.05)。此外,听力损失在不同企业、地区、行业有差异。提示,应继续加强用人单位主体责任,落实职业病危害防护措施,提高噪声作业人员防护意识。

关键词：噪声听力损失职业健康检查

高职“专创融合”教学改革与实践——以鹤壁职业技术学院为例

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粮油科学与工程 2024年第4期38卷 42-44页

作者：郝慧敏杨玉红张守花鹤壁职业技术学院河南鹤壁458030

以鹤壁职业技术学院为例,通过分析食品类专业人才培养模式存在的问题,探讨高职食品类专业“专创融合”的教学模式,提出专创融合课程教学、双创平台实践、校企深度合作等方面的改革与实践方案。

关键词：高职食品专创融合教学改革

Geochemical Characteristics of Heavy Metals in Riparian Sediment Pore Water of Songhua River, Northeast China

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Chinese Geographical Science 2011年第2期21卷 195-203页

作者： ZHU Hui YAN Baixing PAN Xiaofen yang yuhong WANG Lixia Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

This study reports the geochemical characteristics of zinc (Zn), copper (Cu), lead (Pb), nickel (Ni), mercury (Hg), iron (Fe), and manganese (Mn) in the riparian sediment pore water of the Songhua River, Northeast China. In total, 36 pore water samples and 18 surface water samples from three typical sections were collected and analyzed in June 2009. Cluster analysis of heavy metals was performed to analyze the pollution sources of the metals. Results showed that Hg concentrations in the pore water were greater than those in the surface water, indicating a potential ability of Hg release from riparian sediment system to river water. However, concentrations of Fe and Mn in the surface water were greater than those in the pore water, demonstrating that the microenvironments of riparian and riverbed sediment systems were quite different. Variations of Zn, Cu, Pb and Ni between the surface and the pore water were different in each section. Most metals had similar horizontal and profile distribution characteristics in the three sections except for Zn and Ni. Hg, Fe and Mn concentrations in the pore water increased gradually with the increase in horizontal distance from water body, in contrast to this, Cu decreased, and Pb presented a fluctuating trend. With the increase in depth, Pb and Fe, Cu and Mn showed the same trends, and Hg showed a variable trend. The above distribution characteristics could mainly be attributed to the properties and the interactions of metals, pH and oxidation-reduction conditions, and the complex pollution sources and hydrologic regime in history. The probable sources of metals include the historical and ongoing discharge of industrial wastewater, mining activities, sewage irrigation for agricultural production, and atmospheric deposition from coal-fired plants.

关键词： heavy metal riparian sediment pore water water pollution Songhua River

On Loss Spillover Mechanism

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学术界 2015年第6期 307-311页

作者： yang yuhong Ni Ning Ni Na School of Business Administration Shanghai Lixin University of Commerce Department of human resource management Shanghai Normal University Department of Management and Marketing Hong Kong Polytechnic University

Negative events not only result in losses for the target organization,but also a spillover effect which harms innocent organization in addition. This research will focus on the mechanism behind the spillover effect and attempts to build a sound loss- spillover model,aiming to benefit whoever use it to enhance an organization’s ability on coping with accidental events,improving an organization’s capability on identity building and its ability to properly choose institutional environments and helping leaders of organizations and administrators better understand the industry and promote a self- constraining culture within the industry.

关键词： loss spillover organizational legitimacy organizational reputation

木屑共热解活化钛石膏材料的吸附除磷性能研究

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水处理技术 2024年第10期50卷 63-69页

作者：杨育红韩彤彤寇丽栋许欣欣刘永波王静华北水利水电大学环境与市政工程学院河南省水环境模拟与治理重点实验室河南郑州450046 华北水利水电大学水利学院河南郑州450046 河南省科学院化学研究所有限公司河南郑州450002 龙佰集团股份有限公司河南焦作454191

以工业副产钛石膏(TiG)为原料,与木屑共热解制备吸附材料(单独热解TiG-a与木屑共热解TiG-s),研究了不同pH、初始浓度、接触时间、共存物质等条件下TiG-s对水中磷酸盐的吸附性能和吸附机理。结果显示,木屑共存、氮气氛围、700℃热解条件... 详细信息

以工业副产钛石膏(TiG)为原料,与木屑共热解制备吸附材料(单独热解TiG-a与木屑共热解TiG-s),研究了不同pH、初始浓度、接触时间、共存物质等条件下TiG-s对水中磷酸盐的吸附性能和吸附机理。结果显示,木屑共存、氮气氛围、700℃热解条件下TiG-s的磷吸附容量是TiG-a的近20倍,计算饱和吸附容量112.6 mg/g;TiG-s对初始浓度小于25 mg/L的磷溶液去除率大于99%,吸附平衡TP质量浓度满足《地表水环境质量标准》(GB 3838-2002)Ⅲ类要求;水中共存物质对TiG-s吸附磷影响不明显。材料表征分析表明TiG-s比表面积BET小于10 m^(2)/g,物理吸附贡献少;溶液pH<3.5环境下TiG-s的Zeta电位为正,磷吸附机理为静电吸附和表面化学沉淀共同作用;FTIR、XRD、XPS图谱显示,更广泛pH条件下,TiG-s吸附磷以Ca-P表面化学沉淀为主。木屑共热解制备磁性钛石膏基吸附材料为钛石膏资源化利用、去除水中磷提供了新路径。

关键词：钛石膏热改性除磷吸附表面化学沉淀

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浅谈计量标准中的四类更换

计量与测试技术 2024年第3期51卷 70-72页

作者：王明珺欧晓念杨宇红贵州省计量测试院

本文根据JJF 1033-2023《计量标准考核规范》,对计量标准器或主要配套设备、开展检定或校准依据的计量检定规程或计量校准规范、计量标准负责人和检定或校准人员、环境条件及设施四类变更进行了解析。

关键词：计量标准标准器更换

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急性缺血性卒中静脉溶栓出血转化预测因素

分子诊断与治疗杂志 2024年第6期16卷 1143-1146,1151页

作者：王一孙中武杨玉红周霞安徽医科大学附属滁州医院(滁州市第一人民医院)神经内科安徽滁州239001 安徽医科大学第一附属医院神经内科安徽合肥230022

目的研究急性缺血性卒中静脉溶栓出血转化预测因素。方法选取安徽医科大学附属滁州医院(滁州市第一人民医院)神经内科三病区2020年1月至2023年9月收治的114例急性缺血性卒中并给予静脉溶栓治疗的患者为研究对象。依据是否发生出血转... 详细信息

目的研究急性缺血性卒中静脉溶栓出血转化预测因素。方法选取安徽医科大学附属滁州医院(滁州市第一人民医院)神经内科三病区2020年1月至2023年9月收治的114例急性缺血性卒中并给予静脉溶栓治疗的患者为研究对象。依据是否发生出血转化分为观察组(发生HT,12例)、对照组(未发生HT,102例)。比较两组患者的一般资料与临床资料,将有统计学差异的变量纳入影响急性缺血性卒中出血转化的多因素分析中,应用受试者工作特征曲线(ROC)来检验预测因素的效能。结果两组NIHSS评分、年龄、术前抗血小板治疗比例比较差异有统计学意义(P<0.05)。多因素Logistic回归分析显示,NIHSS评分与急性缺血性卒中静脉溶栓出血转化呈明显正相关(OR=1.140,P<0.05)。NIHSS评分预测HT的ROC曲线下面积0.79,敏感度为83%,特异度为64%,约登指数为0.47。结论 NIHSS评分可能是急性缺血性卒中静脉溶栓出血转化的独立预测因子。

关键词：急性缺血性卒中静脉溶栓出血转化