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Asymmetrically coordinated main group atomic In-S_(1)N_(3)interface sites for promoting electrochemical CO_(2)reduction

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Nano Research 2024年第6期17卷 5011-5021页

作者： Yan Gao Jinlong Ge jingqiao zhang Ting Cao Zhiyi Sun Wensheng Yan Yu Wang Jie Lin Wenxing Chen Zheng Liu Anhui Provincial Engineering Laboratory of Silicon-based Materials Bengbu UniversityBengbu 233030China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China SEPA Key Laboratory of Eco-Industry Chinese Research Academy of Environmental SciencesBeijing 100012China Ningbo Institute of Materials Technology and Engineering Chinese Academy of ScienceNingbo 315201China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Shanghai Synchrotron Radiation Facilities Shanghai Institute of Applied PhysicsChinese Academy of ScienceShanghai 201204China

Designing catalysts with highly active,selectivity,and stability for electrocatalytic CO_(2)to formate is currently a severe ***,we developed an electronic structure engineering on carbon nano frameworks embedded with nitrogen and sulfur asymmetrically dual-coordinated indium active sites toward the efficient electrocatalytic CO_(2)reduction *** expected,atomically dispersed In-based catalysts with In-S_(1)N_(3)atomic interface with asymmetrically coordinated exhibited high efficiency for CO_(2)reduction reaction(CO_(2)RR)to *** achieved a maximum Faradaic efficiency(FE)of 94.3%towards formate generation at−0.8 V *** hydrogen electrode(RHE),outperforming that of catalysts with In-S2N2 and In-N4 atomic *** at a potential of−1.10 V ***,In-S_(1)N_(3)achieves an impressive Faradaic efficiency of 93.7%in flow *** catalytic performance of In-S_(1)N_(3)sites was confirmed to be enhanced through in-situ X-ray absorption near-edge structure(XANES)measurements under electrochemical *** discovery provides the guidance for performance regulation of main group metal catalysts toward CO_(2)RR at atomic scale.

关键词： indium single-site catalyst main group metal asymmetrical coordination CO_(2)reduction reaction structure-activity relationship

使用预制菜不告知对消费者权益的侵害与保护分析

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现代食品 2024年第5期30卷 26-29页

作者：张景乔姚霞西藏大学政法学院西藏拉萨850000

近年来,预制菜品与乡村振兴、居民生活深度融合,逐渐成为我国经济发展的新业态、新动能。伴随预制菜产业的繁荣发展,也带来了许多市场乱象,这给消费者的权益保护带来了许多新挑战。本文通过调查研究,分析了消费者对预制菜的接受度、关注... 详细信息

近年来,预制菜品与乡村振兴、居民生活深度融合,逐渐成为我国经济发展的新业态、新动能。伴随预制菜产业的繁荣发展,也带来了许多市场乱象,这给消费者的权益保护带来了许多新挑战。本文通过调查研究,分析了消费者对预制菜的接受度、关注点,并进一步研究了预制菜在餐饮行业经营过程中对消费者权益保护的影响因素。在此基础上,提出通过制规立法、加强监管、推动预制菜在餐饮领域经营公示制度的建立等方法,以期实现预制菜产业的高质量发展和消费者权益保护的两者平衡。

关键词：饮食消费预制菜消费者权益食品安全

Spatial and temporal variation of particulate matter and gaseous pollutants in 26 cities in China

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Journal of Environmental Sciences 2014年第1期26卷 75-82页

作者： Fahe Chai Jian Gao Zhenxing Chen Shulan Wang Yuechong zhang jingqiao zhang Hefeng zhang Yaru Yun Chun Ren State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences

O3 and PM2.5 were introduced into the newly revised air quality standard system in February 2012, representing a milestone in the history of air pollution control, and China＇s urban air quality will be evaluated using six factors （SO2, NO2, O3, CO, PM2.5 and PM10） from the beginning of 2013. To achieve the new air quality standard, it is extremely important to have a primary understanding of the current pollution status in various cities. The spatial and temporal variations of the air pollutants were investigated in 26 pilot cities in China from August 2011 to February 2012, just before the new standard was executed. Hourly averaged SO2, NO2 and PMlo were observed in 26 cities, and the pollutants O3, CO and PM2.5 were measured in 15 of the 26 cities. The concentrations of SO2 and CO were much higher in the cities in north China than those in the south. As for O3 and NO2, however, there was no significant difference between northern and southern cities. Fine particles were found to account for a large proportion of airborne particles, with the ratio of PM2.5 to PMI0 ranging from 55% to 77%. The concentrations of PM2.5 （57.5 μg/m3） and PMlo （91.2 μg/m3） were much higher than the values （PM2.5：11.2μg/m3; PMI0：35.6 μg/m3） recommended by the World Health Organization. The attainment of the new urban air quality standard in the investigated cities is decreased by 20% in comparison with the older standard without considering O3, CO and PM2.5, suggesting a great challenge in urban air quality improvement, and more efforts will to be taken to control air pollution in China.

关键词： air quality standard gaseous pollutant particulate matters non-attainment

Implementation of Level-3 Autonomous Patient-Specific Quality Assurance with Automated Human Interactive Devices

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2023年第4期12卷 99-113页

作者： jingqiao zhang Yizhou Zhao Jameson T. Baker Yijian Cao Jenghwa Chang Northwell New Hyde Park NY USA Department of Radiation Medicine Zucker School of Medicine at Hofstra/Northwell Lake Success NY USA Department of Physics and Astronomy Hofstra University Hempstead NY USA

Purpose: Patient-specific quality assurance (PSQA) requires manual operation of different workstations, which is time-consuming and error-prone. Therefore, developing automated solutions to improve efficiency and accuracy is a priority. The purpose of this study was to develop a general software interface with scripting on a human interactive device (HID) for improving the efficiency and accuracy of manual quality assurance (QA) procedures. Methods: As an initial application, we aimed to automate our PSQA workflow that involves Varian Eclipse treatment planning system, Elekta MOSAIQ oncology information system and PTW Verisoft application. A general platform, the AutoFrame interface with two imbedded subsystems—the AutoFlow and the PyFlow, was developed with a scripting language for automating human operations of aforementioned systems. The interface included three functional modules: GUI module, UDF script interpreter and TCP/IP communication module. All workstations in the PSQA process were connected, and most manual operations were automated by AutoFrame sequentially or in parallel. Results: More than 20 PSQA tasks were performed both manually and using the developed AutoFrame interface. On average, 175 (±12) manual operations of the PSQA procedure were eliminated and performed by the automated process. The time to complete a PSQA task was 8.23 (±0.78) minutes for the automated workflow, in comparison to 13.91 (±3.01) minutes needed for manual operations. Conclusion: We have developed the AutoFrame interface framework that successfully automated our PSQA procedure, and significantly reduced the time, human (control/clicking/typing) errors, and operators’ stress. Future work will focus on improving the system’s flexibility and stability and extending its operations to other QA procedures.

关键词： Level-3 Automation Patient-Specific Quality Assurance Human Interactive Devices Scripting

Impact of emission control on regional air quality: An observational study of air pollutants before, during and after the Beijing Olympic Games

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Journal of Environmental Sciences 2014年第1期26卷 175-180页

作者： Shulan Wang Jian Gao Yuechong zhang jingqiao zhang Fahe Cha Tao Wang Chun Ren Wenxing Wang State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Department of Civil and Structrual Engineering The Hong Kong Polytechnic University

An observational study on trace gases and PM2.5 was conducted at three sites in and around Beijing, during the Olympic season from 2007 to 2009. Air quality improved significantly during the Olympic Games due to the special emission control measures. However, concentrations of the primary pollutants and PM were found to have risen significantly after the Games. Although the major O3 precursors （NOx and VOCs） were well controlled during the Olympic season, O3 was still found to be the highest in 2008, based on the data of ground-based observation. All this information suggests that while control of regional emissions for the Beijing Olympic Games did improved the air quality in Beijing, more efforts will be needed for the continuous improvement of regional air quality, especially for significant reductions of O3 and fine particulate pollution, and not only in Beijing, but also in the B eijing-Tianjin-Hebei region.

关键词： Beijing Olympic Games primary pollutants ozone fine particle air

Photochemical properties and source of pollutants during continuous pollution episodes in Beijing, October, 2011

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Journal of Environmental Sciences 2014年第1期26卷 44-53页

作者： Jian Gao Yuechong zhang Meng zhang jingqiao zhang Shulan Wang Jun Tao Han Wang Datong Luo Fahe Chai Chun Ren State Key Laboratory of Environmental Criteria Risk Assessment Chinese Research Academy of Environmental Sciences South China Institute of Environmental Sciences Ministry of Environmental Protection

Beijing suffered from serious air pollution in October, 2011 with the occurrence of three continuous episodes. Here we analyze the pollution status of particulate matter, the relationship between the gaseous pollutants, physical and chemical properties of single particles, and the profile of water-soluble ions in PM2.5 during the three episodes. Regional and photochemically aged air masses, which were characterized as having high values of O3 and SO2, were hypothesized to have played a dominant role in the first episode. After mixing local air masses with freshly-emitted primary pollutants, the concentration of NOx continued to increase and the size of SO42-, NO3- and NH4＋ in the particle population continued to become smaller. The amount of elemental carbon-rich and organic carbonrich particles in the scaled single particles （0.2-2 μm） and water-soluble K＋ in PM2.s also increased in the episodes. All the available information suggests that the biomass or fuel burning sources in or around Beijing may have had a huge impact on the last two episodes.

关键词： Beijing particulate matter single particles photochemical property pollution episodes

Chemical composition and source apportionment of PM10 and PM2.5 in different functional areas of Lanzhou,China

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Journal of Environmental Sciences 2016年第2期28卷 75-83页

作者： Xionghui Qiu Lei Duan Jian Gao Shulan Wang Fahe Chai Jun Hu jingqiao zhang Yaru Yun School of Environment Tsinghua University Beijing 10084 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 10084 China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing 210000 China

To elucidate the air pollution characteristics of northern China, airborne PM_10（atmospheric dynamic equivalent diameter ≤ 10 μm） and PM_（2.5）（atmospheric dynamic equivalent diameter ≤ 2.5 μm） were sampled in three different functional areas（Yuzhong County,Xigu District and Chengguan District） of Lanzhou, and their chemical composition（elements, ions, carbonaceous species） was analyzed. The results demonstrated that the highest seasonal mean concentrations of PM_10（369.48 μg/m^3） and PM_（2.5）（295.42 μg/m^3） were detected in Xigu District in the winter, the lowest concentration of PM_（2.5）（53.15 μg/m^3） was observed in Yuzhong District in the fall and PM_10（89.60 μg/m^3） in Xigu District in the *** overall average OC/EC（organic carbon/elemental carbon） value was close to the representative OC/EC ratio for coal consumption, implying that the pollution of Lanzhou could be attributed to the burning of coal. The content of SNA（the sum of sulfate, nitrate,ammonium, SNA） in PM_（2.5）in Yuzhong County was generally lower than that at other sites in all seasons. The content of SNA in PM_（2.5）and PM_10 in Yuzhong County was generally lower than that at other sites in all seasons（0.24–0.38）, indicating that the conversion ratios from precursors to secondary aerosols in the low concentration area was slower than in the area with high and intense pollutants. Six primary particulate matter sources were chosen based on positive matrix factorization（PMF） analysis, and emissions from dust, secondary aerosols, and coal burning were identified to be the primary sources responsible for the particle pollution in Lanzhou.

关键词： Chemical composition Particulate matter Source apportionment Functional areas

基于放疗过程中腮腺图像纹理特征的变化早期预测头颈部肿瘤放射性口干症

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中华放射医学与防护杂志 2019年第4期39卷 262-267页

作者：闫朱敏 zhang jingqiao Chen Xiaojian 海龙孙学明吴慧郑州大学附属肿瘤医院放疗科 450008 美国纽约质子中心纽约州10035 美国威斯康星医学院放疗中心密尔沃基53226

目的分析头颈部肿瘤患者放疗过程中腮腺图像纹理特征的变化,研究其与急性放射性口干症(级别)的关系。建立数学模型,早期预测放射性口干严重性。方法观察23例头颈部肿瘤放疗的患者,根据放射治疗肿瘤协作组(RTOG)标准评价患者每周口干程... 详细信息

目的分析头颈部肿瘤患者放疗过程中腮腺图像纹理特征的变化,研究其与急性放射性口干症(级别)的关系。建立数学模型,早期预测放射性口干严重性。方法观察23例头颈部肿瘤放疗的患者,根据放射治疗肿瘤协作组(RTOG)标准评价患者每周口干程度。采集这些患者放疗中每周的验证CT图像,传至MIM系统,勾画出腮腺的轮廓,在MATLAB(R2013a)中开发内部分析程序。分析放疗过程中每周腮腺CT图像的纹理特征的变化,包括平均CT值(MCTN)、标准差(STD)、偏斜度(skewness)、峰度(kurtosis)和熵(entropy),以及体积的变化。建立数学模型,并利用KNN方法对所建模型进行优化,预测口干级别。结果平均CT值和体积的变化与口干程度无明显相关性(P>0.05),但根据二者每周的变化建立模型,预测口干级别,准确度为99%。结论同时基于平均CT值和相对体积变化建立模型可早期预测口干严重程度。

关键词：腮腺口干症纹理特征 CT图像早期预测

660 MW高位布置汽轮机组给水系统可靠性提升与应用

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能源科技 2023年第5期21卷 57-60页

作者：马锋张精桥国能锦界能源有限责任公司陕西神木719319

世界首例2×660MW高位布置汽轮发电机组汽动给水泵密封水出现油水互串和密封水无法回收技术难题,在无借鉴经验情况下,对存在的问题进行分析研究,提出了改进措施并实际应用;给水泵小汽轮机调节阀由单伺服阀控制不可靠,将小汽轮机调节阀... 详细信息

世界首例2×660MW高位布置汽轮发电机组汽动给水泵密封水出现油水互串和密封水无法回收技术难题,在无借鉴经验情况下,对存在的问题进行分析研究,提出了改进措施并实际应用;给水泵小汽轮机调节阀由单伺服阀控制不可靠,将小汽轮机调节阀改造为双伺服阀控制,互为热备、无扰切换,降低了给水泵组的误动率;小汽轮机速关组合件4只停机电磁阀由任意“四取二”改为串并联“四取二”动作,可防止保护误动或拒动,有效提升了机组单列配置给水系统的可靠性。

关键词：给水系统小汽轮机给水泵控制可靠性