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肠壁囊样积气症25例临床分析

中华普通外科杂志 2024年第8期39卷 590-592页

作者：陈爽程瑾王超王屹叶颖江高志冬北京大学人民医院胃肠外科 100044 北京大学人民医院放射科 100044

目的探讨肠壁囊样积气症(PCI)患者的临床特征、治疗及预后。方法回顾性分析2011年1月至2020年12月北京大学人民医院诊治的25例PCI患者的临床资料。结果本组25例PCI患者中男9例,女16例,中位年龄69(55~78)岁,无症状者6例,其余患者主诉以... 详细信息

目的探讨肠壁囊样积气症(PCI)患者的临床特征、治疗及预后。方法回顾性分析2011年1月至2020年12月北京大学人民医院诊治的25例PCI患者的临床资料。结果本组25例PCI患者中男9例,女16例,中位年龄69(55~78)岁,无症状者6例,其余患者主诉以腹痛多见(12例),其次为腹泻(4例)、便秘(2例)、腹胀(1例),15例PCI患者合并低白蛋白血症。PCI以肠壁内多发囊状气体积聚为主要影像学表现,23例发生于结直肠,17例合并腹腔游离气体。所有患者均通过保守治疗治愈,随访至今未发现与PCI相关的死亡病例。结论PCI是一种罕见的消化道疾病,临床表现不典型,保守治疗是其有效的治疗措施,预后良好。

关键词：肠壁囊样积气症预后

Efficient seismic analysis for nonlinear soil-structure interaction with a thick soil layer

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 553-565页

作者： gao zhidong Zhao Xu Zhao Mi Du Xiuli Wang Junjie Liu Pengcheng Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100124China College of Civil Engineering Tongji UniversityShanghai 200092China

The direct finite element method is a type commonly used for nonlinear seismic soil-structure interaction(SSI)*** method introduces a truncated boundary referred to as an artificial boundary meant to divide the soil-structure system into finite and infinite *** artificial boundary condition is used on a truncated boundary to achieve seismic input and simulate the wave radiation effect of infinite *** the soil layer is particularly thick,especially for a three-dimensional problem,the computational efficiency of seismic SSI analysis is very low due to the large size of the finite element model,which contains an whole thick soil *** this paper,an accurate and efficient scheme is developed to solve the nonlinear seismic SSI problem regarding thick soil *** process consists of nonlinear site response and SSI *** nonlinear site response analysis is still performed for the whole thick soil *** artificial boundary at the bottom of the SSI analysis model is subsequently relocated upward from the bottom of the soil layer(bedrock surface)to the location nearest to the structure as ***,three types of typical sites and underground structures are adopted with seismic SSI analysis to evaluate the accuracy and efficiency of the proposed efficient analysis scheme.

关键词： soil-structure interaction thick soil layer efficient analysis absorbing boundary

Magnetostratigraphy and provenance of the Qingzhou loess in Shandong province

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Journal of Arid Land 2011年第3期3卷 184-190页

作者： ShuZhen PENG LiJun ZHU GuoQiao XIAO YanSong QIAO zhidong gao DongDong CHEN Department of Tourism Resources and Environment Taishan University Taian 271021 China College of Urban and Environment Sciences of Shanxi Normal University Linfen 041000 China Key Laboratory of Biogeology and Environmental Geology of Ministry of Education China University of Geosciences Wuhan 430074 China Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China

Loess deposits with varying thickness are widely distributed on the intermontane valleys and piedmont zones on the northern side of the central Shandong mountainous regions. However, the basal ages and material resources of the loess deposits are not clear. The paper studied the Qingzhou loess profile in Shandong with magnetostratigraphic and optical stimulated luminescence （OSL） methods and further investigated its main provenances with the mineralogical methods. The magnetostratigraphic results showed that the Brunhes/Matuyama （B/M） reversal boundary was not recognized, suggesting a basal age younger than 0.78 Ma. Extrapolations by sedimentation rates, based on the upper part depositional rate from the OSL age, the basal age of the Qingzhou loess is about 0.5 Ma. Until now, older loess deposits have not been reported on the northern side of the central Shandong mountainous regions. The results of the paper indicate that the loess deposits in this area might have strated from the Middle Pleistocene. The basal age of Qingzhou loess is approximately synchronous with the Xiashu loess in the middle-lower reaches of Yangtze River. Major components of clay minerals in the Qingzhou profile are dominated by illite. Other clay mineral compositions are mainly smectite, chlorite and kaolinite, which are similar with the Xifeng loess in the Loess Plateau. However, the contents of smectite and the ratios of illite and kaolinte in the Qingzhou loess samples are higher than those in the Xifeng loess samples of the Loess Plateau, indicating that the loess in the northern side of the central Shandong mountainous regions has different sources from that of the loess deposits in the Loess Plateau. The clay mineral analysis further reinforces the earlier conclu- sion that the marine strata exposed in the Laizhou Bay and the fluvial plain of the lower reaches of Yellow River during the glacier periods are the main material sources for the Qingzhou loess deposits, which is an indicator t

关键词： Loess magnetostratigraphy sedimentology material provenance Qingzhou

2020—2022年北京市大学和高中学段新生结核菌素皮肤试验反应特征分析

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中国防痨杂志 2024年第1期46卷 40-44页

作者：赵鑫张亚楠闫银锁陶荔莹李亚敏许琰高志东贺晓新北京市疾病预防控制中心结核病预防控制所北京100035 北京市疾病预防控制中心北京100035

目的:了解2020—2022北京市大学和高中学段入学新生结核菌素皮肤试验(tuberculin skin test,TST)反应特征,为学校结核病防控及疫情处置工作提供依据。方法:利用“北京市新生肺结核筛查系统”及《大学新生PPD筛查登记表》报表,建立北京... 详细信息

目的:了解2020—2022北京市大学和高中学段入学新生结核菌素皮肤试验(tuberculin skin test,TST)反应特征,为学校结核病防控及疫情处置工作提供依据。方法:利用“北京市新生肺结核筛查系统”及《大学新生PPD筛查登记表》报表,建立北京市大学和高中学段入学新生结核病筛查数据库,选取2020—2022年进行TST检测并完成复验的高中、大学录取新生为调查对象,共纳入292486名;其中,选取2020—2021年进行监测的大学录取新生为调查对象,共计159915名;选取2021—2022年高中录取新生作为调查对象,共计132571名。调查对象均进行TST且完成复验。结果:调查对象TST硬结平均直径≥5 mm者占15.57%(45545/292486)、硬结平均直径≥10 mm者占7.38%(21582/292486),硬结平均直径≥15 mm者占2.94%(8599/292486)。在大学学段新生中,以硬结平均直径≥10 mm为阳性标准,女生阳性率(9.27%,6678/72038)明显高于男生(8.93%,7836/87708),差异有统计学意义(χ^(2)=5.403,P=0.020);西部、中部、东部生源阳性率分别为10.95%(3757/34297)、10.15%(3642/35897)、7.69%(6659/86580),差异有统计学意义(χ^(2)=399.682,P<0.001);以硬结平均直径≥5 mm为阳性标准,男生阳性率(17.56%,15403/87708)明显高于女生(17.03%,12269/72038),差异有统计学意义(χ^(2)=7.769,P=0.005)。在高中学段新生中,以硬结平均直径≥10 mm为阳性标准,女生阳性率(5.62%,3539/63018)明显高于男生(5.06%,3517/69553),差异有统计学意义(χ^(2)=20.523,P<0.001);有肺结核可疑症状者的阳性率(10.63%,17/160)明显高于无肺结核可疑症状者(5.32%,7039/132408),差异有统计学意义(χ^(2)=8.938,P=0.003);有肺结核患者密切接触史者的阳性率(11.48%,14/122)高于无密切接触史者(4.76%,5733/120501),差异有统计学意义(χ^(2)=12.122,P<0.001);城六区新生阳性率(5.70%,4373/76713)高于非城六区新生(4.80%,2683/55858),差异有统计学意义(χ^(2)=51.635,P<0.001)。大学新生总体肺结核检出率为33.96/10万(129/379810),明显高于高中阶段新生的15.09/10万(20/132571),差异有统计学意义(χ^(2)=12.047,P=0.001)。结论:北京市大学学段新生TST阳性率和肺结核检出率均高于高中学段新生,女生、西部生源地、肺结核可疑症状者、肺结核患者密切接触者的结核分枝杆菌感染率相对较高,提示应加强北京市新生入学肺结核筛查,以做好学校结核病防控工作。

关键词：结核,肺皮肤试验学生

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2013—2023年北京市学校肺结核聚集性疫情苗头监测及追踪结果分析

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中国防痨杂志 2024年第6期46卷 672-677页

作者：赵鑫李亚敏陶荔莹张亚楠李艳圆许琰闫银锁高志东贺晓新北京市疾病预防控制中心结核病预防控制所北京100035 北京市疾病预防控制中心器材物资采供科北京100013 北京市疾病预防控制中心北京100035

目的:分析2013—2023年北京市学校肺结核聚集性疫情监测及追踪处置结果,为肺结核疫情处置和防控提供参考。方法:收集“传染病报告信息管理系统定时报表”中学校肺结核报告发病情况,汇总各区疾病预防控制机构/结核病防治机构报送的“北... 详细信息

目的:分析2013—2023年北京市学校肺结核聚集性疫情监测及追踪处置结果,为肺结核疫情处置和防控提供参考。方法:收集“传染病报告信息管理系统定时报表”中学校肺结核报告发病情况,汇总各区疾病预防控制机构/结核病防治机构报送的“北京市学校肺结核聚集性疫情苗头监测及调查处置月报表”,分析全市肺结核聚集性疫情监测效果,以及聚集性疫情苗头、聚集性疫情和突发公共卫生事件特征。结果:2013—2023年,北京市共报告学校肺结核患者4428例,共监测发现学校肺结核聚集性疫情苗头743起,学校肺结核报告发病数(4428例)与聚集性疫情苗头数(743例)呈高度正相关(Pearson相关性系数=0.699,P=0.017)。743起学校肺结核聚集性疫情苗头中,构成肺结核聚集性疫情139起,聚集性疫情占比为18.71%(139/743),其中6起定性为学校肺结核突发公共卫生事件。学校肺结核聚集性疫情中,患者数以2例为主,占51.80%(72/139),2月(2起)和8月(5起)为低峰期,聚集性疫情数量排名前三位的区是海淀区(69起)、昌平区(17起)和通州区(11起),普通高等学校(94起)为学校肺结核聚集性疫情发生的主要场所。结论:北京市开展学校肺结核聚集性疫情苗头监测,可及时进行肺结核聚集性疫情早期发现与处置,尤其应重视普通高等学校的肺结核聚集性疫情防控,防范聚集性疫情的发生和传播。

关键词：结核,肺学生,公共卫生人群监测

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Regulation of pseudographitic carbon domain to boost sodium energy storage

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Nano Research 2024年第6期17卷 5188-5196页

作者： zhidong Hou Mingwei Jiang Da Lei Xiang Zhang Yuyang gao Jian-Gan Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Lab of Graphene(NPU)Xi’an 710072China

Hard carbon anode has shown extraordinary potentials for sodium-ion batteries(SIBs)owing to the cost-effectiveness and advantaged ***,the widespread application of hard carbon is still hindered by the insufficient sodium storage capacity and depressed rate property,which are mainly induced by the undesirable pseudographitic ***,we develop a molten-salt-mediated strategy to regulate the pseudographitic structure of hard carbon with suitable interlayer spacing and enlarged pseudographitic domain,which is conducive to the intercalation capacity and diffusion kinetics of sodium ***,the optimized hard carbon anode delivers a high reversible capacity of 320 mAh·g^(−1),along with superior rate property(138 mAh·g−1 at 2 A·g^(−1))and stable cyclability over 1800 ***,the in situ Raman spectroscopic study and full-cell assembly further investigate the sodium storage mechanism and practical implement of obtained hard *** work pioneers a low-cost and effective route to regulate the pseudographitic structure of hard carbon materials for advanced SIBs.

关键词： pseudographitic structure molten salt hard carbon anode sodium-ion batteries

“北京结核病防治”微信公众号运营现状与基于WCI的影响力分析

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首都公共卫生 2024年第3期18卷 162-166页

作者：赵瑶高志东陶荔莹张红伟李艳圆许琰北京市疾病预防控制中心 100013

目的分析“北京结核病防治”微信公众号的运营现状与影响力,为单病种传染病的公众号科普提供参考。方法收集2020年8月1日—2023年7月31日的用户、图文等数据,采用描述性方法分析运营现状,通过微信传播指数(WeChat communication index,W... 详细信息

目的分析“北京结核病防治”微信公众号的运营现状与影响力,为单病种传染病的公众号科普提供参考。方法收集2020年8月1日—2023年7月31日的用户、图文等数据,采用描述性方法分析运营现状,通过微信传播指数(WeChat communication index,WCI)评价影响力。结果截至2023年7月31日,公众号关注人数93.03万人,女性为主(70.94%);36~45岁居多(57.89%)。共推送798篇图文,总阅读量235.61万次,平均阅读量2953次。传播活动类平均阅读量最高(10876次),原创推文的平均阅读量(3324次)高于转载推文(2341次)。总体WCI为694.69,传播活动类的WCI值最高(987.43),传染源科普类WCI值最低(574.10)。每年7—9月WCI为高峰期,3月为小高峰。结论建议单病种传染病公众号通过与实际工作结合方式增加关注用户,文章以单病种健康科普知识与符合关注用户特征的相关健康科普内容相结合;适当开展传播活动,提升公众号影响力。

关键词：微信运营影响力

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互花米草在江苏海岸的扩散现状及防治对策

江苏林业科技 2024年第2期51卷 43-47页

作者：安玉亭陈志洲陈国远殷鹏高志东李春荣江苏盐城国家级珍禽自然保护区管理处江苏盐城224057

互花米草作为我国沿海滩涂危害最大的外来植物,其防治已成为江苏省滨海湿地管理与保护的重要工作。(1)江苏省互花米草呈现出面积大、分布广、繁殖能力强、扩散风险高、治理难度大等特点。(2)不同治理技术各有优缺点,配合使用不同的综合... 详细信息

互花米草作为我国沿海滩涂危害最大的外来植物,其防治已成为江苏省滨海湿地管理与保护的重要工作。(1)江苏省互花米草呈现出面积大、分布广、繁殖能力强、扩散风险高、治理难度大等特点。(2)不同治理技术各有优缺点,配合使用不同的综合治理技术,对环境影响较小,治理效果较好。(3)总结提出了构建预警监测体系、优化综合治理技术、降低人为干扰、强化科技支撑、开展治理后生态修复、构建长效管理和全民参与机制的防治策略,为其他地区互花米草的治理工作提供借鉴。

关键词：江苏省沿海滩涂互花米草防治对策

Preferentially selective extraction of lithium from spent LiCoO_(2)cathodes by medium-temperature carbon reduction roasting

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 315-322页

作者： Daixiang Wei Wei Wang Longjin Jiang zhidong Chang Hualei Zhou Bin Dong Dekun gao Minghui Zhang Chaofan Wu School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Anhui Chaoyue Environmental Protection Technology Co. LtdChuzhou 239060China Anhui Huihong Technology Co. LtdChuzhou 239060China

Lithium recovery from spent lithium-ion batteries(LIBs)have attracted extensive attention due to the skyrocketing price of *** medium-temperature carbon reduction roasting was proposed to preferential selective extraction of lithium from spent Li-CoO_(2)(LCO)cathodes to overcome the incomplete recovery and loss of lithium during the recycling *** LCO layered structure was destroyed and lithium was completely converted into water-soluble Li2CO_(3)under a suitable temperature to control the reduced state of the cobalt *** Co metal agglomerates generated during medium-temperature carbon reduction roasting were broken by wet grinding and ultrasonic crushing to release the entrained *** results showed that 99.10%of the whole lithium could be recovered as Li2CO_(3)with a purity of 99.55%.This work provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.

关键词： spent LiCoO_(2)cathodes medium-temperature carbon reduction lithium extraction priority crystal transformation macro-scopic transport resistance