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活动小行星311P/PANSTARRS的动力学特性分析

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天文学报 2024年第2期65卷 87-102页

作者：辛瑛琦史建春马月华陈媛媛中国科学院紫金山天文台/中国科学院行星科学重点实验室南京210023 中国科学技术大学天文与空间科学学院合肥230026 中国科学院上海天文台上海200030 中国科学院比较行星学卓越创新中心合肥230026

311P/PANSTARRS是一颗活动小行星,具有小行星和彗星的双重特征,是中国``天问二号'的探测目标之一.311P/PANSTARRS直径较小,约为400 m,非引力效应可能会对其长期动力学演化产生较大的影响.通过假定不同表面组分,研究了Yarkovsky效应对311... 详细信息

311P/PANSTARRS是一颗活动小行星,具有小行星和彗星的双重特征,是中国``天问二号'的探测目标之一.311P/PANSTARRS直径较小,约为400 m,非引力效应可能会对其长期动力学演化产生较大的影响.通过假定不同表面组分,研究了Yarkovsky效应对311P/PANSTARRS轨道演化的影响,讨论了密近交汇、非破坏性碰撞和YORP(Yarkovsky-O'Keefe-Radzievskii-Paddack)效应等非引力效应,计算了小行星与大行星密近交汇及碰撞概率,估计了311P/PANSTARRS达到自转周期分裂极限的时标.模拟结果显示与纯引力模型相比,Yarkovsky效应可能会加快311P/PANSTARRS离开当前共振区域,大约在10Myr以后311P/PANSTARRS会离开当前所在共振带,在表面覆盖风化层的情况下有机会通过v6长期共振成为越火小行星;在考虑YORP效应的情况下,311P/PANSTARRS在2 Myr时标内可达到自转周期分裂极限;在考虑Yarkovsky效应及YORP效应等因素的情况下,311P/PANSTARRS在10 Myr时标内仍可保持其动力学稳定性,且YORP效应不会显著影响其半长径偏移量.

关键词：天体力学方法:统计行星和卫星:动力学演化和稳定性矮行星小行星:个别:311P/PANSTARRS

虚拟仿真平台+Mini-CEX评估法在医学影像学中的应用

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中国高等医学教育 2024年第5期 112-113,116页

作者：祁英赵鹏飞侯阳中国医科大学附属盛京医院辽宁沈阳110004 中国医科大学药学院辽宁沈阳110000

目的:探讨虚拟仿真平台+Mini-CEX评估法在医学影像实践课中的应用价值。方法:将186名学生随机分组并分别应用虚拟仿真平台和传统教学法实习教学。通过考试和Mini-CEX评估法评价教学效果及满意度。结果:试验组在主观成绩、总成绩、学习... 详细信息

目的:探讨虚拟仿真平台+Mini-CEX评估法在医学影像实践课中的应用价值。方法:将186名学生随机分组并分别应用虚拟仿真平台和传统教学法实习教学。通过考试和Mini-CEX评估法评价教学效果及满意度。结果:试验组在主观成绩、总成绩、学习主动性和综合学习能力方面评价结果优于对照组,具有较高满意度(P<0.05)。结论:虚拟仿真平台+Mini-CEX评估法能满足医学影像学实践教学和评估需要,有利于提高学习成绩、加强影像诊断思维能力培养。

关键词：轻量型虚拟仿真平台医学影像实践教学

基于专业简介制订的专业建设可行性分析——以轨道交通智能控制装备技术专业为例

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辽宁高职学报 2024年第4期26卷 37-40页

作者：王英奇王天鹤辽宁轨道交通职业学院辽宁沈阳110023

精准把握轨道交通智能控制装备技术专业人才需求情况,有助于为院校对该专业简介制订提供现实依据。课题组采用网络会议、调研问卷、电话沟通等方式对轨道交通装备行业,企业和院校进行调研和可行性分析,发现行业企业对该专业技能型、复... 详细信息

精准把握轨道交通智能控制装备技术专业人才需求情况,有助于为院校对该专业简介制订提供现实依据。课题组采用网络会议、调研问卷、电话沟通等方式对轨道交通装备行业,企业和院校进行调研和可行性分析,发现行业企业对该专业技能型、复合型人才需求量大,偏重毕业生的专业技能、关联知识技能等特点。依据该专业人才需求情况,提出相应的调整人才培养规格、优化核心课程体系、建立校企合作长效机制等措施。

关键词：高等职业教育轨道交通智能控制装备技术专业可行性分析

Preparation of rare-earth-modified medical stone powders and their application as conductive fillers

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International Journal of Minerals,Metallurgy and Materials 2019年第2期26卷 260-266页

作者： Li-ying qi Su-e Hao Tian-cheng Sun School of Chemistry and Chemical Engineering Harbin Institute of Technology

Traditional metal conductive fillers are expensive and prone to oxidation. Thus, the development of new conductive powders as fillers is urgently needed. A novel gaseous penetration technology was adopted to prepare La-doped medical stone powders(La-MSPs), which are inexpensive mesoporous materials, as a new kind of conductive filler material. The prepared La-MSPs attained a resistivity of 450 ?·m and were used as a filler to prepare conductive coatings with epoxy resin as the resin matrix. The influence of the La-MSPs dosage on the resistance and hardness of the coatings was also determined. The resistance and the hardness both decreased with increasing filler dosage. Finally, the optimum recipe of the conductive coatings with the most suitable fillers dosage(55 wt%) was obtained. The hardness and resistance of the coatings with 55 wt% La-MSPs were HV 4 and 5.5 × 10~7 ?, respectively.

关键词： chemical engineering conductive materials rare earths medical stone powders gaseous penetration technology

Oligo-lysine Induced Formation of Silica Particles in Neutral Silicate Solution

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Chemical Research in Chinese Universities 2006年第3期22卷 368-370页

作者： ZHANG Xiao-dong SUN ying-ying ZHUANG Jia-qi YANG Wen-sheng College of Chemistry Jilin University Changchun 130023 P.R. China

Oligo-（lysine） n （n = 1-4） containing different numbers of lysine residues was used to induce the condensation of silicic acid to form silica particles in neutral silicate solution. It was found that the condensation rate and the formation of silica particles are dependent on the number of lysine residues in an oligo-lysine. Oligo-lysine with more lysine residues can link more silicic acid together to form a matrix that promotes the effective aggregation of the condensed silica pieces to form large silica particles.

关键词： Biosilification Polylysine Silica

安徽省某传染病专科医院人才队伍建设情况调查分析及应对措施

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安徽医专学报 2024年第4期23卷 1-3页

作者：张良明戚应杰合肥市传染病医院安徽合肥230022

目的:探讨传染病医院人才队伍建设问题,分析改进的措施和方案。方法:统计分析某省传染病医院近五年专业人才队伍建设情况和存在的不足及解决办法。结果:某院在2018年-2022年期间专业技术人员和职工总人数呈逐年增加的趋势,总人数平均年... 详细信息

目的:探讨传染病医院人才队伍建设问题,分析改进的措施和方案。方法:统计分析某省传染病医院近五年专业人才队伍建设情况和存在的不足及解决办法。结果:某院在2018年-2022年期间专业技术人员和职工总人数呈逐年增加的趋势,总人数平均年增长速度为3.22%,截止2022年12月某医院共有职工336人,其中卫生技术人员为268人,占总职工人数的79.76%,本科及以上学历人数、副高及以上职称人数分别占卫生技术人员的73.13%、18.65%;医护比为1:1.74,床护比为1:0.74,床位与医护比为1:1.17。结论:某医院本科及以上学历人数呈逐年增长趋势,高级职称人才占比有待提高。传染病医院应通过优化卫生专业人才薪酬分配、晋升途径等措施提高医院专业人才队伍的质量。

关键词：传染病专科医院人才队伍建设质量

尿β2-MG、NAG及RBP联合检验在临床判定乙肝肝硬化患者发生早期肾损伤中应用价值分析

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罕少疾病杂志 2024年第9期31卷 80-82页

作者：李乐维齐莹莹胡亚会河南中医药大学第五临床医学院(郑州人民医院)检验科河南郑州450000

目的探讨尿β2微球蛋白(β2-MG)、N-乙酰-β-D-氨基葡萄糖苷酶(NAG)及视黄醇结合蛋白(RBP)联合检验在临床判定乙肝肝硬化患者发生早期肾损伤中应用价值。方法选择2021年3月至2023年5月就诊于本院的86例乙肝肝硬化患者,按肾小球滤过率(... 详细信息

目的探讨尿β2微球蛋白(β2-MG)、N-乙酰-β-D-氨基葡萄糖苷酶(NAG)及视黄醇结合蛋白(RBP)联合检验在临床判定乙肝肝硬化患者发生早期肾损伤中应用价值。方法选择2021年3月至2023年5月就诊于本院的86例乙肝肝硬化患者,按肾小球滤过率(e GFR)将患者分为两组,40例e GFR值<90 m L/min/1.73m~2者设为合并早期肾损伤组,其余46例e GFR值≥90 m L/min/1.73m~2者设为肝硬化组。留取两组受检者患者晨间第1次尿液10m L,离心取上清液,使用免疫比浊法检测尿NAG、β2-MG和RBP。对比两组尿NAG、β2-MG、RBP水平差异,并绘制受试者工作特征(ROC)曲线,分析尿NAG、β2-MG、RBP单一与联合检测评定乙肝肝硬化患者发生早期肾损伤的价值。结果合并早期肾损伤组尿NAG、β2-MG、RBP检测值分别为(12.46±3.16)U/L、(2.87±0.71)mg/L、(2.24±0.63)mg/L,均高于肝硬化组的(5.44±1.64)U/L、(0.32±0.09)mg/L、(0.43±0.11)mg/L,有统计学差异(P<0.05)。ROC曲线显示,尿NAG、β2-MG、RBP单一与联合检测评定乙肝肝硬化患者发生早期肾损伤的AUC分别为0.755、0.781、0.765、0.914,灵敏度分别为72.10%、77.90%、75.00%、92.60%,联合检测预测的AUC、灵敏度均高于单一指标(P<0.05)。结论尿NAG、β2-MG、RBP均是检测乙肝肝硬化患者发生早期肾损伤的有效指标,三者联合检测可提高诊断准确性,值得临床推广。

关键词：乙肝肝硬化早期肾损伤 β2微球蛋白 N-乙酰-β-D-氨基葡萄糖苷酶视黄醇结合蛋白

Bilateral complete type discoid medial menisci： an adult patient with tears in both knees

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Chinese Medical Journal 2013年第13期126卷 2587-2588页

作者： LU ying LIU Feng-qi MENG Hai Department of Orthopaedic Surgery Beijing Friendship Hospital Capital Medcial University Beijing 100050 China

Adiscoid meniscus, found in 1%-5% of the population, .is a human anatomic variant that usually affects thelateral meniscus of the knee. A discoid meniscus is more prone to injury than a normally shaped meniscus. In 1941,1 Cave and Staples first reported discoid medial meniscus. A bilateral discoid medial meniscus is extremely rare. The first case of bilateral discoid medial meniscus was reported by Murdoch in 1956.2 Since then, no more than 20 case reports of bilateral discoid medial menisci have been published to date, and most have been single case reports.3 Treatment of a torn discoid medial meniscus is similar to the treatment of a tom lateral meniscus of the knee. In cases where there is a significant disability, surgical excision may be required. Traditionally, the treatment of choice for symptomatic torn discoid meniscus has been open total or partial meniscectomy. Currently, arthroscopic partial meniscectomy is commonly used. Either meniscectomy or conservative method for treatment of a discoid medial meniscus with no tear is a debatable issue.3 A 39-year-old male was admitted to our hospital for intermittent swelling and pain of his right knee in 1999. He had a history of twisting injury on the affected knee 10 years before the admission, but the symptoms were not significant at that time. However, one year ago, on and off swelling with pain had gradually developed in his right knee, worsening with long distance walking and sports activities. Sometimes he felt that the knee was ＂giving way＂. Due to increasing discomfort interfering with his daily life, he was referred to us by his doctor. Physical examination of the patient＇s right knee showed atrophy of the musculus quadriceps femoris compared to the opposite side, medial tibiofemoral joint line tenderness, a range of motion from , and positive McMurray sign. The patient had no complaints on his opposite knee and physical examination did not reveal any abnormalities. MRI scan showed discoid medial meniscus

关键词： bilateral discoid medial meniscimeniscectomy magnetic resonance imaging arthroscopy

Gold-catalyzed intermolecular reaction of ynamides with 3-indolyl azides via an unexpected 1,2-alkyl migration

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Science Bulletin 2017年第17期62卷 1201-1206页

作者： Bo Zhou ying-qi Zhang Xin Liu Long-Wu Ye State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical EngineeringXiamen University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

A gold-catalyzed intermolecular reaction of ynamides with 3-indolyl azides via the presumable α-imino gold carbenes has been developed, providing an alternative and efficient way for the synthesis of valuable 3-amino-β-carbolines in generally good to excellent yields. Importantly, this new protocol involves an unexpected 1,2-alkyl migration pathway.

关键词： Gold Heterocycles Migration Cyclization Tandem reaction