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Diverse glasses revealed from Chang'E-5 lunar regolith

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National Science Review 2023年第12期10卷 150-163页

作者： Rui Zhao Laiquan Shen Dongdong Xiao Chao Chang Yao Huang Jihao Yu Huaping Zhang Ming Liu Shaofan Zhao Wei Yao Zhen Lu Baoan Sun haiyang bai Zhigang Zou Mengfei Yang Weihua Wang Institute of Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Qian Xuesen Laboratory of Space Technology China Academy of Space Technology Songshan Lake Materials Laboratory 5. College of Engineering and Applied Sciences Nanjing University China Academy of Space Technology

Lunar glasses with different origins act as snapshots of their formation processes,providing a rich archive of the Moon’s formation and evolution.Here,we reveal diverse glasses from Chang’E-5(CE-5) lunar regolith,and clarify their physical origins of liquid quenching,vapor deposition and irradiation damage respectively.The series of quenched glasses,including rotation-featured particles,vesicular agglutinates and adhered melts,record multiple-scale impact events.Abundant micro-impact products,like micron-to nano-scale glass droplets or craters,highlight that the regolith is heavily reworked by frequent micrometeorite bombardment.Distinct from Apollo samples,the indigenous ultra-elongated glass fibers drawn from viscous melts and the widespread ultra-thin deposited amorphous rims without nanophase iron particles both indicate a relatively gentle impact environment at the CE-5 landing site.The clarification of multitype CE-5 glasses also provides a catalogue of diverse lunar glasses,meaning that more of the Moon’ s mysteries,recorded in glasses,could be deciphered in future.

关键词： lunar glasses glass fibers amorphous rims micrometeorite impacts gentle impact environment

Highly energetic and flammable metallic glasses

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Science China(Physics,Mechanics & Astronomy) 2020年第7期63卷 68-72页

作者： BangSheng Yu YongHao Sun haiyang bai WeiHua Wang Institute of Physics Chinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Energetic materials are solids that release a large amount of energy in combustion. The evaluation depends on both combustion heat and ignition temperature. Conventional non-metallic materials have low ignition temperature but small combustion heat,whereas metals have large combustion heat but high ignition temperatures. We show that many metallic glasses, combining the merits of both metals and non-metals, have large combustion heat, approximately twice that of the non-metals, and low ignition temperature that is several hundreds of Kelvin lower than that of the metals. The ease in igniting metallic glass results from the low thermal conductivity of the materials and the storage of energy in their liquid-like atomic structure. Metallic glass ribbons outweigh metallic nanoparticles due to their high production efficiency, low cost and nontoxicity. The findings suggest that metallic glasses are alternative energetic materials.

关键词： metallic glass energetic particles combustion fast ignition nanoscale materials

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炼化企业“大污水场”一体化管理新模式探讨

石油炼制与化工 2024年第6期55卷 137-142页

作者：陈永勤董继白海阳中国石化镇海炼化分公司浙江宁波315207

针对炼化企业污水特征复杂多变、简单粗放的工艺运行模式难以适应日趋严格的出水排放标准等问题,提出了“大污水场”一体化管理新模式,通过污水场间“污水、活性污泥、废气”三联通、“药剂集中管理、操作集中控制”两集中等现代化创新... 详细信息

针对炼化企业污水特征复杂多变、简单粗放的工艺运行模式难以适应日趋严格的出水排放标准等问题,提出了“大污水场”一体化管理新模式,通过污水场间“污水、活性污泥、废气”三联通、“药剂集中管理、操作集中控制”两集中等现代化创新管理新方式,统筹企业环保资源,最大化延展污水场的环保辐射边际,实现了污水系统统一管理、污染物负荷动态调配及内部资源化利用,进而实现环保及经济效益双赢。

关键词：炼化企业大污水场一体化管理减排资源化

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∅610管道检测机器人速度控制装置研究

机床与液压 2024年第5期52卷 80-86页

作者：臧延旭姜海洋陈峰白港生梁雪婷刘云杰北华航天工业学院机电工程学院河北廊坊065000 中油管道检测技术有限责任公司河北廊坊065000 中国石油管道局工程有限公司维抢修分公司河北廊坊065000

针对目前常规管道检测机器人在大流速天然气管道内由于运行速度过快而导致无法应用的问题,提出利用速度控制装置对管道机器人进行主动调速。设计∅610管道机器人速度控制装置,并对其开展了静态试验、动态试验和工业试验研究。静态试验压... 详细信息

针对目前常规管道检测机器人在大流速天然气管道内由于运行速度过快而导致无法应用的问题,提出利用速度控制装置对管道机器人进行主动调速。设计∅610管道机器人速度控制装置,并对其开展了静态试验、动态试验和工业试验研究。静态试验压力可到10 MPa,有效检验了速度控制装置泄流阀在高压运转情况下的密封性及动作准确性。动态试验结果表明:∅610速度控制装置泄流阀开启量在1/2区间对速度控制装置产生的压差影响最为明显,当泄流阀开启量超过2/3区间对速度控制装置产生的压差影响很小。工业试验针对带固定泄流孔的管道机器人启动力问题,测试了泄流阀开启固定泄流面积时的启动力,建立了泄流状态下机器人启动压差方程,并测试了速度控制装置的实际降速能力,为大口径、大流速工况下管道检测机器人的调速技术提供了理论和试验基础。

关键词：管道检测机器人速度控制

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真空预压和堆载预压加固机场软基效果对比

交通科技 2024年第1期 14-19页

作者：白乔木刘海洋满立上海机场(集团)有限公司上海机场建设指挥部上海201207 同济大学民航飞行区设施耐久与运行安全重点实验室上海201804

依托浦东机场四期扩建地基处理试验段工程,开展了大面积软土地基真空预压和堆载预压试验。基于地基表面沉降、分层沉降、孔隙水压力,以及水平位移的变化规律,比较了真空预压和堆载预压加固软基效果。结果表明,真空预压和堆载预压对机场... 详细信息

依托浦东机场四期扩建地基处理试验段工程,开展了大面积软土地基真空预压和堆载预压试验。基于地基表面沉降、分层沉降、孔隙水压力,以及水平位移的变化规律,比较了真空预压和堆载预压加固软基效果。结果表明,真空预压和堆载预压对机场软土地基加固效果均较好,地表沉降量可达到1000 mm左右,淤泥质黏土层沉降值可达到30 cm左右。抽真空与堆载过程中孔隙水压力变化较大,预压结束后黏土层存在孔隙水压力残留。真空预压水平位移较大,约占沉降的40%,堆载预压区域外土体易发生隆起变形,需严格控制堆载速率。

关键词：真空预压堆载预压地基加固机场现场试验

Uterine artery pseudoaneurysm after subtotal hysterectomy:a case report

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World Journal of Emergency Medicine 2023年第6期14卷 502-504页

作者： Ting Xu Xiaobo Wang Ruo'an Jiang Wen Li Shengting Yin haiyang Tang Haizhen Dai Xiaoxia bai Department of Obstetrics and Gynecology Womens Hospital Zhejiang University School of Medicine Hangzhou 310006China Traditional Chinese Medicine for Reproductive Health Key Laboratory of Zhejiang Province Hangzhou 310006China Zhejiang Provincial Clinical Research Center for Obstetrics and Gynecology Hangzhou 310006China Key Laboratory of Women's Reproductive Health Hangzhou 310006China

Vaginal bleeding is a common symptom in the emergency department of obstetrics and gynecology hospitals;however,post-hysterectomy vaginal bleeding is a rare phenomenon.Uterine artery pseudoaneurysm(UAP)is a rare condition that can lead to fatal bleeding and most commonly occurs as a long-term complication after invasive surgery or even in non-invasive procedures,such as cesarean section,myomectomy,dilatation and curettage,cervical conization and vaginal delivery.[1-3]Pseudoaneurysm is a pulsatile hematoma formed after arterial injury and rupture.

关键词： arterial rupture after

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动车组车顶电缆终端弹性连接方案研究

电力机车与城轨车辆 2024年第1期47卷 92-95页

作者：李善飞鲁海洋李文彪白璐中车青岛四方机车车辆股份有限公司山东青岛266111

目前主流的动车组车顶受电弓电缆终端均采用刚性连接方案,振动加速度大,易造成内部结构损伤。针对该问题,文章提出在动车组车顶电缆终端采用弹性连接的优化方案,并设计了3种不同结构方案的9种典型弹性减振结构。通过振动传递试验对比可... 详细信息

目前主流的动车组车顶受电弓电缆终端均采用刚性连接方案,振动加速度大,易造成内部结构损伤。针对该问题,文章提出在动车组车顶电缆终端采用弹性连接的优化方案,并设计了3种不同结构方案的9种典型弹性减振结构。通过振动传递试验对比可知,弹性连接能明显改善电缆终端的振动特性,且刚度越小,电缆终端的振动特性越好。

关键词：动车组电缆终端刚性连接弹性连接

Exosomal miR-155 from gastric cancer induces cancerassociated cachexia by suppressing adipogenesis and promoting brown adipose differentiation via C/EPBβ

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Cancer Biology & Medicine 2022年第9期19卷 1301-1314页

作者： Ying Liu Meng Wang Ting Deng Rui Liu Tao Ning Ming bai Guoguang Ying haiyang Zhang Yi Ba Tianjin Medical University Cancer Institute and Hospital National Clinical Research Center for CancerTianjin’s Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin 300060China

Objective:The aim of this research was to identify whether exosomes were involved in impairing adipogenesis in cancer-associated cachexia(CAC)by detecting the adipodifferentiation capacity and the expressions of adipogenic proteins in gastric cancer(GC)-associated adipocytes.Methods:Western blotting and RT-PCR were used to investigate the expressions of C/EPBβ,C/EPBα,PPARγ,and UCP1 in adipose mesenchymal stem cells(A-MSCs)to evaluate the function of exosomal miR-155.BALB/c nude mice were intravenously injected in vivo with GC exosomes with different levels of miR-155 to determine changes in adipodifferentiation of A-MSCs.Results:Exosomes derived from GC cells suppressed adipogenesis in A-MSCs as characterized by decreased lipid droplets.Similarly,A-MSCs co-cultured with GC exosomes exhibited increased ATP production through brown adipose differentiation characterized by highly dense mitochondria and enhanced UCP1 expression(P<0.05).Mechanistically,exosomal miR-155 secreted from GC cells suppressed adipogenesis and promoted brown adipose differentiation by targeting C/EPBβ,accompanied by downregulated C/EPBαand PPARγand upregulated UCP1(P<0.05).Moreover,overexpression of miR-155 in GC exosomes improved CAC in vivo,which was characterized by fat loss,suppressed expressions of C/EPBβ,C/EPBα,and PPARγin A-MSCs,and high expression of UCP1(P<0.05).Decreasing the level of miR-155 in injected GC exosomes abrogated the improved CAC effects.Conclusions:GC exosomal miR-155 suppressed adipogenesis and enhanced brown adipose differentiation in A-MSCs by targeting C/EPBβof A-MSCs,which played a crucial role in CAC.

关键词： Exosomes adipose mesenchymal stem cells miR-155 cachexia gastric cancer

灵宝护心丹治疗原发性微血管性心绞痛的疗效观察

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现代药物与临床 2024年第5期39卷 1210-1215页

作者：王海洋杨侃白翠萍张晋玮张志良乔崇范春晖南阳市中心医院河南南阳473000

目的观察研究灵宝护心丹治疗原发性微血管性心绞痛的临床疗效及安全性。方法选取2019年12月—2022年6月就诊于南阳市中心医院的原发性微血管性心绞痛患者76例,按随机数字表法分为对照组(38例)和治疗组(38例)。对照组患者给予冠状动脉... 详细信息

目的观察研究灵宝护心丹治疗原发性微血管性心绞痛的临床疗效及安全性。方法选取2019年12月—2022年6月就诊于南阳市中心医院的原发性微血管性心绞痛患者76例,按随机数字表法分为对照组(38例)和治疗组(38例)。对照组患者给予冠状动脉粥样硬化性心脏病二级预防常规治疗,治疗组在上述治疗基础上口服灵宝护心丹,4粒/次,3次/d。两组患者均连续治疗4周。观察两组患者临床疗效,比较治疗前后两组患者西雅图心绞痛调查量表(SQA)评分、运动平板结果和冠脉血流储备(CFR)。结果治疗后,治疗组总有效率为92.11%,明显高于对照组(71.05%,P<0.05)。治疗后,两组SAQ评分在各方面均高于治疗前(P<0.05),且治疗组显著高于对照组(P<0.05)。治疗后,两组患者运动平板总运动时间明显升高,而ST段最大压低程度明显下降(P<0.05),且治疗组患者运动平板结果改善均显著优于对照组(P<0.05)。治疗后,两组CFR指标比治疗前明显升高(P<0.05),且治疗组患者冠脉血流储备情况显著高于对照组(P<0.05)。结论灵宝护心丹能够改善微血管心绞痛患者的临床症状,提高冠脉血流储备,增强运动耐量并改善患者生活质量。

关键词：灵宝护心丹微血管心绞痛西雅图心绞痛调查量表运动平板试验冠状动脉血流储备