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Journal of Environmental Sciences 2019年第2期31卷 48-56页

作者： Yunjia Yang Jiachen Shi Yi yang Jie Yin Jing Zhang Bing Shao Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning Beijing Center for Disease Prevention and Control Beijing Research Center for Preventive Medicine

Various disinfection byproducts(DBPs) form during the process of chlorination disinfection,posing potential threats to drinking water safety and human health. Sulfamethazine(SMT),the most commonly used and frequently detected veterinary antibiotic, was investigated in detail with regard to its transformation and kinetics in reactions with free available chlorine(FAC). Using liquid chromatography coupled to quadrupole time-of-flight tandem mass spectrometry, several DBPs were identified based on different confidence levels, and a variety of reaction types, including desulfonation, S–N cleavage, hydroxylation, and chlorine substitution, were proposed. The kinetic experiments indicated that the reaction rate was FAC-and pH-dependent, and SMT exhibits low reactivity toward FAC in alkaline conditions. The DBPs exhibited a much higher acute toxicity than SMT, as estimated by quantitative structure activity relationship models. More importantly, we observed that the FAC-treated SMT reaction solution might increase the genotoxic potential due to the generation of DBPs. This investigation provides substantial new details related to the transformation of SMT in the chlorination disinfection process.

关键词： LC-QTOF Sulfamethazine Transformation products Chlorination Toxicity

Urinary analysis reveals high Alternaria mycotoxins exposure in the general population from Beijing, China

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Journal of Environmental Sciences 2022年第8期34卷 122-129页

作者： Xiaoting Qiao Gang Li Jing Zhang Jing Du Yunjia Yang Jie Yin Hui Li Jie Xie You Jiang Xiang Fang Xinhua Dai Bing Shao Technology Innovation Center of Mass Spectrometry for State Market Regulation Center for Advanced Measurement ScienceNational Institute of MetrologyBeijing 100029China Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning Beijing Center for Disease Prevention and ControlBeijing 100013China School of Food and Bioengineering Xihua UniversityChendu 610039China

Alternaria mycotoxins are of concern due to its adverse health effect, they affect various cereal crops and grain-based food along with modified forms that contribute to overall exposure. This study aimed to determine the frequency and level of exposure to Alternaria mycotoxins(tenuazonic acid, TeA;alternariol, AOH;alternariol monomethyl ether, AME;tentoxin, TEN;and altenuene, ALT) in human urine from Beijing adults. A total of 2212 urine samples were collected and analyzed for five mycotoxins using LC–ESI–MS/MS. More than98% of the samples had at least one Alternaria mycotoxin detected. Among the mycotoxins,AME had the highest detection rate(96.0%), followed by TeA(70.5%). The calculated average daily intake values of AME(12.5 ng/kg b.w.) was 5 times the TTC value(2.5 ng/kg b.w.) set by the EFSA, indicating the potential health risks associated with mycotoxins. Immediate attention and subsequent actions should be taken to identify the sources of mycotoxins and the corresponding exposure pathways to humans in the investigated regions.

关键词： Alternaria mycotoxin Biomonitoring UPLC-MS/MS Exposure assessment Adults

Non-Hermitian Weyl semimetals:Non-Hermitian skin effect and non-Bloch bulk-boundary correspondence

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Chinese Physics B 2022年第1期31卷 45-50页

作者：杨孝森曹阳翟云佳 Department of physics Jiangsu UniversityZhenjiang 212013China

We investigate novel features of three-dimensional non-Hermitian Weyl semimetals,paying special attention to the unconventional bulk-boundary correspondence.We use the non-Bloch Chern numbers as the tool to obtain the topological phase diagram,which is also confirmed by the energy spectra from our numerical results.It is shown that,in sharp contrast to Hermitian systems,the conventional(Bloch)bulk-boundary correspondence breaks down in non-Hermitian topological semimetals,which is caused by the non-Hermitian skin effect.We establish the non-Bloch bulk-boundary correspondence for non-Hermitian Weyl semimetals:the topological edge modes are determined by the non-Bloch Chern number of the bulk bands.Moreover,these topological edge modes can manifest as the unidirectional edge motion,and their signatures are consistent with the non-Bloch bulk-boundary correspondence.Our work establishes the non-Bloch bulk-boundary correspondence for non-Hermitian topological semimetals.

关键词： non-Hermitian skin effect Weyl semimental bulk-boundary correspondence

Novel application of red mud as disposal catalyst for pyrolysis and gasification of coal

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Carbon Resources Conversion 2021年第1期4卷 10-18页

作者： Zhaohui Chen Deliang Wang Hang yang Yusheng Zhang yunjia Li Changming Li Jian Yu Shiqiu Gao State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Chemical Engineering Polytechnique MontrealMontrealQC H3C 3A7Canada

Red mud(RM)with the high alkalinity as a catalyst was evaluated for coal pyrolysis in a fixed bed as well as CO_(2) gasification of its resultant char in a thermogravimetric analyzer(TGA).The addition of RM into coal could improve the quality of tar during pyrolysis and enhance the reactivity of char during gasification.For catalytic pyrolysis with 12 wt%RM at 600℃,the light fraction in tar was 72.0 wt%,which increased by 20.0%,compared with coal pyrolysis alone.The role of metal oxides in RM on coal pyrolysis was further clarified as well.After catalytic pyrolysis with RM,the specific surface area of resultant char increased,especially for mesoporous surface area,and meanwhile the sodium in RM was proved to migrate to the char surface.These positive factors contributed to the CO_(2) gasification activity of char.RM with the high alkalinity showed a promising catalyst candidate for coal pyrolysis and gasification in terms of its catalytic effects and low cost.

关键词： Catalytic coal pyrolysis Red mud Tar upgrading Metal oxides Sodium migration Catalytic gasification

基于微博大数据的“一路象北”事件社会感知与时空格局研究

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地理与地理信息科学 2023年第4期39卷 10-16页

作者：杨云佳史兴民陕西师范大学地理科学与旅游学院陕西西安710119 华东师范大学城市与区域科学学院上海200241

2020—2021年“一路象北”(一群云南大象集体向北迁移并返回)事件吸引了国内外媒体的关注。该文对2020年3月1日至2021年11月30日“一路象北”事件微博数据进行时空分析与情感分析,结果表明:(1)该事件属于大众媒体导入性事件,微博评论与... 详细信息

2020—2021年“一路象北”(一群云南大象集体向北迁移并返回)事件吸引了国内外媒体的关注。该文对2020年3月1日至2021年11月30日“一路象北”事件微博数据进行时空分析与情感分析,结果表明:(1)该事件属于大众媒体导入性事件,微博评论与微博博文热度趋势大致同步,但最高值的出现时间不同;(2)全国尺度上,东、中、西部的关注热度空间格局各有特点,云南、河南、四川的热度较高,云南省内微博热度集中于大象行经地点,整体空间自相关性不显著;(3)微博博文与评论的文本相似度较低,情感的侧重点略有偏差,利用社会语义网络分析得到的中心、次中心有差异,整体呈现正向情感。该研究可为中长时间尺度的网络事件舆情分析与生态文明建设提供参考。

关键词：微博大数据社会感知时空格局社会语义网络分析 “一路象北”

基于流体网络法的喷管冷却气流量分配计算方法

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航空动力学报 2022年第6期37卷 1181-1194页

作者：杨韫加陈海昕许羚清华大学航天航空学院北京100084 中国航空发动机集团有限公司沈阳发动机研究所沈阳110015

流体网络法对喷管气膜冷却问题具有独特的优势,但难以反映出入流对冷却气流道静压变化的影响。针对此引入了可反映出入流导致静压变化的管道元件,并基于孔口速度落后角对静压变化量进行了建模。验证算例表明,这一改进使沿程静压变化趋... 详细信息

流体网络法对喷管气膜冷却问题具有独特的优势,但难以反映出入流对冷却气流道静压变化的影响。针对此引入了可反映出入流导致静压变化的管道元件,并基于孔口速度落后角对静压变化量进行了建模。验证算例表明,这一改进使沿程静压变化趋势与实际吻合较好,使冷却气流量分配计算误差降低到0.5%以下。将改进后的流体网络法与主流通道的计算流体力学模拟耦合用于分析喷管冷却气流量分配,与全计算流体力学模拟相比结果差异小于1.2%,且大幅降低计算量;在某型喷管设计中的应用表明,可以有效反映冷却结构改变对冷却气流量分配的影响。

关键词：流体网络法喷管冷却冷却气流量分配耦合计算气膜孔

A Study on the Psychological Status of the Caregivers to Patients Out of ICU after Craniocerebral Tumor Surgery and Their Factors

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Neuroscience & Medicine 2021年第1期12卷 1-11页

作者： Ying Li Daili Zou Yu yang yunjia Li Qinqin Zhao Zhihuan Zhou Sun Yat-sen University Cancer Center Guangzhou China

Objective: So as to provide a theoretical basis for the future development of intervention measures to reduce the negative psychological mood of caregivers. To investigate the psychological status of the main caregivers for patients who were transferred out of ICU after craniocerebral tumor surgery and analyze their factors. Methods: 112 patients with cerebral tumor surgery were reviewed from sun yat-sen university cancer hospital. The research object is caregivers. The general data questionnaire, hospital anxiety depression scale and migration of ICU patients’ family members stress questionnaire scale investigation are collected. Multiple linear regression analysis in cerebral tumor patients with postoperative ICU transition out main factors influencing the psychological condition of the caregivers. Results: The anxiety and depression scores were (15.60 ± 5.83) and (38.73 ± 3.23) respectively. The results of multiple regression analysis showed that the gender, education level, relationship with the patient and family monthly income of the primary caregivers of the patients were the influencing factors of anxiety, depression and migration stress psychological state (P Conclusion: The main caregivers of patients who were transferred out of ICU after craniocerebral tumor surgery had relatively severe anxiety, depression and migration stress. Medical staff should pay attention to the psychological status of caregivers and take effective measures to promote their physical and mental health.

关键词： Craniocerebral Tumor Surgery ICU Transition Period Caregivers Psychological Status Factors Affecting

超分子水杨酸联合多西环素治疗中重度痤疮的疗效观察

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中国皮肤性病学杂志 2024年第2期38卷 188-191,219页

作者：沈云佳郝阳阳杨建强湖州市第一人民医院皮肤科浙江湖州313000

目的观察超分子水杨酸联合多西环素及夫西地酸治疗中重度痤疮的临床疗效。方法收集2022年7月—2023年4月湖州市第一医院皮肤科门诊的寻常痤疮患者70例,用随机数字表法将患者分为观察组和对照组,每组35例。对照组给予多西环素口服及夫西... 详细信息

目的观察超分子水杨酸联合多西环素及夫西地酸治疗中重度痤疮的临床疗效。方法收集2022年7月—2023年4月湖州市第一医院皮肤科门诊的寻常痤疮患者70例,用随机数字表法将患者分为观察组和对照组,每组35例。对照组给予多西环素口服及夫西地酸乳膏外用治疗;观察组在对照组基础上给予超分子水杨酸治疗,2周1次,共4次。结果观察组有效30例,有效率为85.71%;对照组有效22例,有效率为62.86%。观察组疗效高于对照组,差异有统计学意义(χ^(2)=4.786,P<0.05)。结论超分子水杨酸联合多西环素及夫西地酸治疗中重度痤疮疗效更佳,值得临床推广应用。

关键词：痤疮超分子水杨酸多西环素夫西地酸乳膏

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广告设计中的哲学问题前沿理论研究

设计 2022年第24期35卷 130-132页

作者：霍楷杨韫嘉东北大学艺术学院

为研究广告设计中的哲学问题。为此运用文献综述法对广告设计中的哲学问题的发展演变进行阐述;通过查阅相关文献分析广告设计中的哲学问题。在综合分析后对广告设计中哲学问题的发展做出预测;最后对广告设计中哲学问题的前景进行前瞻和... 详细信息

为研究广告设计中的哲学问题。为此运用文献综述法对广告设计中的哲学问题的发展演变进行阐述;通过查阅相关文献分析广告设计中的哲学问题。在综合分析后对广告设计中哲学问题的发展做出预测;最后对广告设计中哲学问题的前景进行前瞻和展望。该研究对广告设计相关前沿理论研究具有参考价值。

关键词：广告设计哲学前沿理论辩证研究

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新文科背景下设计与科技融合改革研究

设计 2022年第15期35卷 100-102页

作者：霍楷杨韫嘉东北大学艺术学院

为解决如何建设新文科、设计专业如何适应科技发展等新课题。为此运用文献综述法、案例列举法与经验总结法对新文科及设计专业与前沿科技融合的状况进行理论阐释;通过查阅文献概括国内外设计专业与前沿科技融合的状况及问题;把握设计专... 详细信息

为解决如何建设新文科、设计专业如何适应科技发展等新课题。为此运用文献综述法、案例列举法与经验总结法对新文科及设计专业与前沿科技融合的状况进行理论阐释;通过查阅文献概括国内外设计专业与前沿科技融合的状况及问题;把握设计专业与前沿科技融合定位。在综合分析后提出以下举措:更新培养方案、革新教学理念、改革教学方法、更新教学内容。该研究在高校布局教育体系新局面、培养新文科人才等方面具有参考价值。

关键词：新文科设计专业前沿科技融合改革研究