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Chinese Journal of Chemical Engineering 2022年第11期51卷 126-134页

作者： Daofei Lv Junhao Xu Pingjun Zhou Shi Tu feng Xu jian Yan Hongxia Xi Zewei Liu Wenbing Yuan Qiang Fu Xin Chen Qibin Xia School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510641China Sichuan Jinyuansheng New Energy Technology Co. LtdMeishan 620010China

The separation of propylene and propane is an important but challenging process,primarily achieved through energy-intensive distillation technology in the petrochemical ***,we reported two natural C4linkers based metal–organic frameworks(MIP-202 and MIP-203)for C_(3)H_(6)/C_(3)H_(8)*** isotherms and selectivity calculations were performed to study the adsorption performance for C_(3)H_(6)/C_(3)H_(8)*** show that C_(3)H_(6)/C_(3)H_(8)uptake ratios(298 K,100 kPa)for MIP-202 and MIP-203 are 2.34 and 7.4,respectively.C_(3)H_(6)/C_(3)H_(8)uptake ratio(303 K,100 k Pa)for MIP-203 is up *** mechanism for enhanced separation performance of C_(3)H_(6)/C_(3)H_(8)on MIP-203 at higher temperature(303 K)was revealed by the in situ PXRD *** adsorption selectivities of C_(3)H_(6)/C_(3)H_(8)on MIP-202 and MIP-203(298 K,100 k Pa)are 8.8 and 551.4,*** mechanism for the preferential adsorption of C_(3)H_(6)over C_(3)H_(8)in MIP-202 and MIP-203 was revealed by the Monte Carlo *** cost of organic ligands for MIP-202 and MIP-203 was lower than that of organic ligands for those top-performance *** work sets a new benchmark for C_(3)H_(6)sorbents with high adsorption selectivities.

关键词： Propylene Propane Separation Gas Adsorption Metal-organic frameworks

Integration of flexible,recyclable,and transient gelatin hydrogels toward multifunctional electronics

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Journal of Materials Science & Technology 2023年第14期145卷 83-92页

作者： Rui Yin Chen Zhang jian Shao Youyou Chen Ao Yin Qiang feng Shuqin Chen Fei Peng Xing Ma Cheng-Yan Xu Feihua Liu Weiwei Zhao Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Shenzhen Key Laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Advanced Welding&Joining Harbin Institute of TechnologyHarbin 150001China

Facing the challenges posed by exponentially increasing e-waste,the development of recyclable and tran-sient electronics has paved the way to an environmentally-friendly progression strategy,where electron-ics can disintegrate and/or degrade into eco-friendly end products in a controlled *** polymers possess cost and energy efficiency,easy modification,and fast degradation,all of which are ideal prop-erties for transient *** is especially attractive due to its unique thermoreversible gelation processes,yet its huge potential as a multifunctional electronic material has not been well-researched due to its limited mechanical strength and low ***,we explored versatile applications of gelatin-based hydrogels through the assistance of multifunctional additives like carbon nanotubes to enhance their electromechanical *** optimized gelatin hydrogel displays not only a high conductivity of 0.93 S/m,electromagnetic shielding effectiveness of 39.6 dB,and tensile stress tolerance of 263 kPa,but also shows a negative permittivity phenomenon,which may find versatile applications in novel *** a proof of concept,hydrogels were assembled as wearable sensors to sensitively de-tect static and dynamic pressures and strains generated by solids,liquids,and airflow,as well as diverse body ***,the recyclability,biocompatibility,and degradability of gelatin-based hy-drogels were well studied and *** work outlines a facile method to design multifunctional transient materials for wearable,sustainable,and eco-friendly electronics.

关键词： Gelatin hydrogels Carbon nanotubes Negative permittivity Electromagnetic interference shielding Wearable sensor

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洱海鱼类多样性

大理大学学报 2024年第6期9卷 108-114页

作者：钟传艳李钢褚维乐沈剑封吉猛龙晓文大理大学农学与生物科学学院云南大理671003 洱海流域水生态团队云南大理671003 上海交通大学云南(大理)研究院云南大理671000 云南洱海湖泊生态系统国家野外科学观测研究站云南大理671000 苍山洱海一体化保护与流域绿色发展云南省高校协同创新中心云南大理671003

通过查阅20世纪50年代以来洱海鱼类相关文献资料,结合2022年洱海鱼类实地采样和走访调查,对洱海鱼类历史区系变化及现状进行分析。截至2022年,洱海共记录鱼类54种,分属于7目14科31属,其中土著种20种,特有土著种9种,国家二级保护动物1种... 详细信息

通过查阅20世纪50年代以来洱海鱼类相关文献资料,结合2022年洱海鱼类实地采样和走访调查,对洱海鱼类历史区系变化及现状进行分析。截至2022年,洱海共记录鱼类54种,分属于7目14科31属,其中土著种20种,特有土著种9种,国家二级保护动物1种:大理裂腹鱼Schizothorax taliensis。2022年洱海鱼类调查共发现鱼类23种,分属于4目9科,其中鲤科鱼类占鱼类物种总数的60.87%,其他鱼类占39.13%,包括鳅科、塘鳢科、鰕虎鱼科、鳢科、银鱼科、胡瓜鱼科、鲿科及鲇科,优势种为子陵吻鰕虎鱼Rhinogobius giurinus、■Hemiculter leucisculus、黄颡鱼Pelteobagrus fulvidraco和西太公鱼Hypomesus nipponensis;调查发现草金鱼Carassius auratus red var为洱海新记录物种。洱海鱼类群落组成表现为土著种种群数量减少,外来种逐渐增多,经济型鱼类和小型鱼类为当前优势种。

关键词：洱海鱼类外来种土著种

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大规模扩增人外周血来源自然杀伤细胞体系的筛选

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生物化工 2024年第1期10卷 65-70页

作者：董国秀张蕾黄健武芝张闻宇贾在美青岛奥克生物开发有限公司山东青岛266000

目的:探讨人外周血来源的单个核细胞经三种体外培养体系活化扩增后的自然杀伤细胞(NK细胞)在扩增倍数、生物学表型和细胞毒性上的异同。方法:收集健康供者捐赠的外周血,经淋巴细胞分离液介导的密度梯度离心法富集单个核细胞。使用含自... 详细信息

目的:探讨人外周血来源的单个核细胞经三种体外培养体系活化扩增后的自然杀伤细胞(NK细胞)在扩增倍数、生物学表型和细胞毒性上的异同。方法:收集健康供者捐赠的外周血,经淋巴细胞分离液介导的密度梯度离心法富集单个核细胞。使用含自体血浆、重组人细胞因子的无血清培养液,各体系均添加IL-2和IL-15,体系B额外添加抗人CD3单抗,体系C额外添加IL-18,在相同条件下培养扩增14 d,比较不同培养体系的NK细胞在细胞表型、细胞活力及细胞毒性的异同。结果:体系A、B、C中NK细胞扩增倍数分别为811.43±30.07、2800.79±36.42和1047.97±85.21,表明抗人CD3单抗可以增强NK细胞的扩增。三种体系培养NK细胞在细胞表型、细胞周期、细胞活力和细胞毒性方面无统计学差异。结论:使用含自体血浆、重组人IL-2、IL-15细胞因子和抗人CD3单抗的无血清培养液,在37℃、5%CO_(2)条件下可以实现NK细胞大规模培养,获取高纯度的NK细胞。

关键词：自然杀伤细胞扩增倍数细胞表型

关节镜下V-Y结缝合方式与缝线桥技术修复中型肩袖损伤的比较

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中华肩肘外科电子杂志 2024年第2期12卷 107-114页

作者：唐晓俞邓凯文冯剑邹义源郑新波王小芃成都第一骨科医院上肢科 610000

目的回顾性研究关节镜下V-Y结方式与缝线桥技术两种缝合方式修复中型(1~3 cm)肩袖损伤的疗效。方法收集从2019年6月至2022年6月在本科行肩关节镜下手术治疗修复中型肩袖损伤并获得有效随访的患者60例,根据缝合方式不同分成两组:第1组采... 详细信息

目的回顾性研究关节镜下V-Y结方式与缝线桥技术两种缝合方式修复中型(1~3 cm)肩袖损伤的疗效。方法收集从2019年6月至2022年6月在本科行肩关节镜下手术治疗修复中型肩袖损伤并获得有效随访的患者60例,根据缝合方式不同分成两组:第1组采用V-Y结方式缝合(30例),男14例、女16例,平均年龄(58.60±4.61)岁;第2组采用缝线桥技术缝合(30例),男15例、女15例,平均年龄(58.37±4.60)岁。术后佩戴外展包保护6周,6周内进行被动肩关节活动,6周后开始进行肩关节主动上举锻炼。比较两组患者的围手术期指标,术前、末次随访时进行肩关节活动度、美国加州大学洛杉矶分校(University of California at Los Angeles,UCLA)肩关节评分、美国肩肘外科医师学会评分(American shoulder and elbow surgeons,ASES)、Constant-Murley评分及视觉模拟量表(visual analogue scale,VAS)比较疗效。结果所有患者获得随访,时间12~24个月,平均(16.05±3.34)个月,无感染和神经损伤等严重并发症,所有患者的切口甲级愈合。V-Y结组的手术时间明显少于缝线桥组,差异有统计学意义(P0.05)。末次随访时,两组患者的肩关节活动度、VAS评分、UCLA评分、Constant-Murley评分、ASES评分以及随访时间的差异无统计学意义(P>0.05)。末次随访时两组患者的肩关节活动度及各项评分均优于术前(P<0.05)。结论关节镜下采用V-Y结缝合方式修复中型肩袖撕裂是可靠的缝合方式,其能够取得与缝线桥技术相当的临床疗效,并且使用的锚钉数量更少,手术时间更短。

关键词：肩袖损伤关节镜缝线桥技术 V-Y结

变电站自动化系统从IPv4到IPv6的网络迁移策略

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电力信息与通信技术 2024年第4期22卷 77-85页

作者：郑建戚峰陈凡赖欢欢郑伟陈孙胜瞿合祚郑俊翔国网温州供电公司电力调度控制中心浙江省温州市325000 国网温州供电公司变电检修中心浙江省温州市325000 国网温州供电公司信息通信分公司浙江省温州市325000

随着32位的IPv4地址消耗殆尽,公共互联网正在向128位的IPv6地址过渡。尽管目前电力系统通信对IPv6网络的依赖性不强,但仍需提前制定网络迁移策略。文章描述了电力系统通信从IPv4到IPv6迁移的必要性,分析了IPv6迁移对电力系统通信的影响... 详细信息

随着32位的IPv4地址消耗殆尽,公共互联网正在向128位的IPv6地址过渡。尽管目前电力系统通信对IPv6网络的依赖性不强,但仍需提前制定网络迁移策略。文章描述了电力系统通信从IPv4到IPv6迁移的必要性,分析了IPv6迁移对电力系统通信的影响;介绍了目前IPv6迁移的3种过渡策略:双栈设备、隧道技术和转换技术;同时介绍了部分基于IP的应用协议,分析了IEC 61850、60870、61400等通信协议与IP地址的相关性;最后针对变电站自动化不同场景,给出了各场景下从IPv4到IPv6的网络迁移策略,并分析了IPv4到IPv6的迁移对变电站典型自动化应用场景的影响。文章所提网络迁移策略将加快和推广IPv6网络在变电站、控制中心、运维中心等电力系统内的部署和实施,为构建高速率、广普及、全覆盖、智能化的下一代电力通信网络提供技术支撑。

关键词： IPv4 IPv6 网络迁移双栈设备隧道技术转换技术应用协议变电站自动化

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仿平衡囊的四足机器人机体结构设计及分析

制造业自动化 2024年第3期46卷 151-155,185页

作者：秦建华孔佑鹏尹朝坤黄婷婷桂林理工大学机械与控制工程学院桂林541006

为提升四足机器人的平衡性和抗干扰能力,根据平衡囊运动原理引入动量轮机构,设计了一种基于平衡囊原理的四足机器人机体结构。对平衡囊调整姿态平衡的运动过程进行描述,采用欧拉角来说明四足机器人机体坐标系与世界坐标系的指向关系,以... 详细信息

为提升四足机器人的平衡性和抗干扰能力,根据平衡囊运动原理引入动量轮机构,设计了一种基于平衡囊原理的四足机器人机体结构。对平衡囊调整姿态平衡的运动过程进行描述,采用欧拉角来说明四足机器人机体坐标系与世界坐标系的指向关系,以D-H法建立四足机器人腿部结构运动学模型;从拉格朗日方程出发,推导机体的姿态动力学模型和四足机器人系统动力学模型;利用Adams软件对仿平衡囊的四足机器人进行仿真分析,结果表明,动量轮能够明显提升四足机器人的运动平衡能力,同时有效降低腿部各关节输出力矩,从而验证该设计的合理性。

关键词：四足机器人仿平衡囊动量轮动力学

Association between thyroid hormone levels and frailty in the community-dwelling oldest-old: a cross-sectional study

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Chinese Medical Journal 2022年第16期135卷 1962-1968页

作者： Bo Guan Jiakun Luo Xin huang Fan Tian Shasha Sun Yufei Ma Yan Yu Ruihan Liu jian Cao Li Fan Geriatric Cardiology Department of the Second Medical Center and National Clinical Research Centerfor Geriatric Diseases Chinese People's Liberation Army General HospitalBeijing 100089China Medical School of People's Liberation Army General Hospital Bejing 100089China

Background:Changes in thyroid hormone levels are commonly recognized characters among the elderly,which were reported to potentially influence incident ***,we examined the cross-sectional associations of thyroid hormones(THs)with frailty as well as the five components characterizing frailty(fatigue,resistance,ambulation,number ofillnesses,and loss of weight)among the ***:Four hundred and eighty-seven community-dwelling oldest-old from a local community in Haidian District,Beijing,participated in our recruitment campaign between April 2019 and May *** primary outcomes were a definitive diagnosis of frailty according to the FRAIL scale(Fatigue,Resistance,Ambulation,Illnesses,Loss of weight)and a positive score for each frailty *** information(age,sex,marital status,and educational status),comorbidities,and details on the participants lifestyles were *** THs including free triodothyronin(fT3),triiodothyronine(T3),free thyroxine(fT4),and thyroxine(T4)and thyroid stimulating hormone(TSH)levels were also measured at the beginning of our *** regressions were conducted to screen for potential risk factors for frailty and its ***:Among the total 487 subjects at enrollment,60(12.23%)of them were diagnosed with subclinical hypothyroidism and 110(22.59%)of the total population scored positive for *** regression analyses adjusted for all potential confounders,showed that frailty was significantly associated with the serum TSH concentration(odds ratio[OR]:1.06),fT3 concentration(OR:0.54),and subclinical hypothyroidism score(OR:2.18).The association between fT4 and frailty was absent in our observational *** fT3/fT4 ratio characterizing peripheral hormone conversion was also tested to be correlated with ***:Subclinical hypothyroidism,higher TSH level,lower fT3 level,and decreased fT3/fT4 ratio were all associated with frailty assessed by the FRAIL scale among

关键词： Hypothyroidism Frailty Aging Thyroid hormone Oldest-old Triiodothyronin Thyroid stimulating hormone

A novel bat coronavirus with a polybasic furin-like cleavage site

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Virologica Sinica 2023年第3期38卷 344-350页

作者： Wentao Zhu Yuyuan huang jian Gong Lingzhi Dong Xiaojie Yu Haiyun Chen Dandan Li Libo Zhou Jing Yang Shan Lu Department of Infectious Diseases and Clinical Microbiology Beijing Institute of Respiratory Medicine and Beijing Chao-Yang HospitalCapital Medical UniversityBeijing100020China State Key Laboratory of Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing102206China Hainan Provincial Center for Disease Control and Prevention Haikou570203China Research Units of Discovery of Unknown Bacteria and Function Chinese Academy of Medical SciencesBeijing100730China

The current pandemic of COVID-19 caused by a novel coronavirus,severe acute respiratory syndrome coronavirus-2(SARS-CoV-2),threatens human health around the *** particular concern is that bats are recognized as one of the most potential natural hosts of SARS-CoV-2;however,coronavirus ecology in bats is still ***,we performed a degenerate primer screening and next-generation sequencing analysis of 112 bats,collected from Hainan Province,*** coronaviruses,namely bat betacoronavirus(Bat CoV)CD35,Bat CoV CD36 and bat alpha-coronavirus CD30 were *** CoV CD35 genome had 99.5%identity with Bat CoV CD36,both sharing the highest nucleotide identity with Bat Hp-betacoronavirus Zhejiang2013(71.4%),followed by SARS-CoV-2(54.0%).Phylogenetic analysis indicated that Bat CoV CD35 formed a distinct clade,and together with Bat Hp-betacoronavirus Zhejiang2013,was basal to the lineage of SARS-CoV-1 and ***,Bat CoV CD35 harbored a canonical furin-like S1/S2 cleavage site that resembles the corresponding sites of *** furin cleavage sites between CD35 and CD36 are *** addition,the receptor-binding domain of Bat CoV CD35 showed a highly similar structure to that of SARS-CoV-1 and SARS-CoV-2,especially in one binding *** conclusion,this study deepens our understanding of the diversity of coronaviruses and provides clues about the natural origin of the furin cleavage site of SARS-CoV-2.

关键词： Bat Coronavirus SARS-CoV-2 Betacoronavirus Furin Cleavage site

Mechanical and Corrosion Behavior of a Biomedical Mg–6Zn–0.5Zr Alloy Containing a Large Number of Twins

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 439-455页

作者： Chang‑jian Yan Bo Guan Yun‑Chang Xin Ling‑Yu Zhao Guang‑Jie huang Rui Hong Xiao‑Bo Chen Paul K.Chu Institute of Corrosion Science and Technology Guangdong 510070China International Joint Laboratory for Light Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400030China Key Laboratory for Light‑Weight Materials Nanjing Tech UniversityNanjing 210009China School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China School of Engineering RMIT UniversityCarlton 3053VICAustralia Department of Physics Department of Materials Science&EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

The strong texture of Mg alloys can lead to strong tension–compression yield asymmetry and corrosion anisotropy,and this will consequently affect the effectiveness of hard tissue implants.A biomedical Mg–6Zn–0.5Zr alloy containing a large number of{1012}primary twins and{1012}–{1012}secondary twins is successfully prepared by cross *** dual twin structure not only removes the tension–compression yield asymmetry completely,but effectively reduces the corrosion anisotropy without compromise of corrosion *** difference between the largest corrosion rate and smallest one is~1.2 times compared to~1.6 times of the original *** is found that the reduced corrosion anisotropy is related to re-distribution of crystallographic orientations by twins.

关键词： Biomedical Mg alloy Corrosion Mechanical anisotropy Texture Twins