检索结果-南通市图书馆

Nano Research 2024年第5期17卷 4016-4022页

作者： Xin Zhang Junhao Wang Mengyan Wang dongxu liu Zhuo Wang College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of ScienceBeijing 101400China

Hydrogels electrolytes with flexibility and high conductivity have been widely used in kinds of flexible electronics.However,hydrogels always suffer from the inevitable freezing of water at subzero temperatures,which results in the sacrificing of their electrical properties.Herein,an anti-freezing,flexible hydrogel based on in situ reduction of graphene oxide(GO)and laponite has been developed as electrolyte for high performance supercapacitor and sensitive sensors.The crosslinked GO and laponite in polyacrylamide(PAM)resulted in an enhanced mechanical property,while the in-situ reduction of GO in the hydrogel enhanced the conductivity and diminishes the aggregated of GO.These features guarantee a reliable electro signal as sensor and a high performance of the supercapacitor.Besides,in the process of preparation of reduced graphene oxide(rGO)hydrogel,the addition of ethylene glycol(EG)and KOH,endows the hydrogel antifreeze properties.This anti-freezing electrolyte can be stretched to a strain of 1600%and maintained a specific capacitance of 37.38 F·g^(-1) at-20℃.In addition,the photothermal conversion character of rGO in the hydrogel,endows it’s the potential application in wound healing.The overall merits of the hydrogel will open up a new avenue for sensitive sensor and energy storage device in practical applications.

关键词： hydrogel in-situ reduction flexible electronics low temperature tolerance photothermal therapy

Value of Non-tumoral Liver Volume in the Prognosis of Large Hepatocellular Carcinoma Patients After R0 Resection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2023年第3期11卷 560-571页

作者： Dongliang Zuo Yuntong Li Hongzhi liu dongxu liu Qinliang Fang Pengtao Li Liang Tu Yu Xiong Yongyi Zeng Pingguo liu Department of Zhongshan Hospital of Xiamen University School of MedicineXiamen UniversityXiamenFujianChina Department of Hepatobiliary Surgery Zhongshan Hospital Xiamen UniversityXiamenFujianChina Department of Hepatobiliary Surgery Mengchao Hepatobiliary Surgery Hospital of Fujian Medical UniversityFuzhouFujianChina Public Health Clinical Center of Chengdu ChengduSichuanChina

Background and Aims:Hepatectomy is an effective treatment for selected patients with large hepatocellular carcinoma(HCC).This study aimed to develop a nomogram in-corporating non-tumoral liver volume(non-TLV)and liver function markers to predict the patients’overall survival(OS)and disease-free survival(DFS).Methods:Data of 198 consecutive large HCC patients who underwent hepa-tectomy at the Zhongshan Hospital Xiamen University were collected.Another 68 patients from the Mengchao Hepatobil-iary Surgery Hospital served as an external validation cohort.The nomograms were developed based on the independent prognostic factors screened by multivariate Cox regression analyses.Concordance index(C-index),calibration curves,and time-dependent receiver operating characteristic(ROC)curves were used to measure the discrimination and predic-tive accuracy of the models.Results:High HBV DNA level,low non-TLV/ICG,vascular invasion,and a poorly differenti-ated tumor were confirmed as independent risk factors for both OS and DFS.The model established in this study pre-dicted 5-year post-operative survival and DFS in good agree-ment with the actual observation confirmed by the calibra-tion curves.The C-indexes of the nomograms in predicting OS and DFS were 0.812 and 0.823 in the training cohort,0.821 and 0.846 in the internal validation cohort,and 0.724 and 0.755 in the external validation cohort.The areas under the ROC curves(AUCs)of nomograms for predicted OS and DFS at 1,3,and 5 year were 0.85,0.86,0.83 and 0.76,0.76,0.63,respectively.Conclusions:Nomograms with non-TLV/ICG predicted the prognosis of single large HCC patients ac-curately and effectively.

关键词： Hepatocellular carcinoma Hepatectomy Prognosis Nomogram

BnVIR:bridging the genotype-phenotype gap to accelerate mining of candidate variations underlying agronomic traits in Brassica napus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2022年第5期15卷 779-782页

作者： Zhiquan Yang Congyuan Liang LuLu Wei Shengbo Wang Feifan Yin dongxu liu Liang Guo Yongming Zhou Qing-Yong Yang National Key Laboratory of Crop Genetic Improvement College of InformaticsHuazhong Agricultural UniversityWuhan 430070China Hubei Key Laboratory of Agricultural Bioinformatics College of InformaticsHuazhong Agricultural UniversityWuhan 430070China

Dear Editor,Genetic variations,which range from single nucleotide polymor-phisms(SNPs)and short insertion/deletions(InDels)to large-scale structural variations(SVs),are the basis of phenotypic diversity.Understanding the effect of genetic variations on traits is critical for uncovering the genetic architecture of various phe-notypes.

关键词： agronomic traits InDel

Construction of charge transfer chain in Bi_(12)TiO_(20)-Bi_(4)Ti_(3)O_(12)/α-Bi_(2)O_(3)composites to accelerate photogenerated charge separation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第3期16卷 3730-3740页

作者： Jincheng Yin Xuebing Chen Guanna Li dongxu liu Chun Li Rengui Li Bingxing Xie Johannes H.Bitter Jing Zhang School of Environmental and Safety Engineering Liaoning Petrochemical UniversityFushun 113001China Biobased Chemistry and Technology Wageningen University&ResearchStippeneng 4Wageningen 6708 WEThe Netherlands Laboratory of Organic Chemistry Wageningen University&ResearchBornse Weilanden 9Wageningen 6708 WGThe Netherlands State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of New Energy Nanjing University of Science and TechnologyJiangyin 214000China

Photogenerated charge separation and transfer is one of the bottleneck steps in photocatalysis,and efficient charge separation strategies are strongly desired.Here,mimicking the electron transport chain in natural photosynthesis,we report the design and fabrication of a charge transfer chain using bismuth-based semiconductor as a proof-of-concept.In view of the thermodynamic energy band positions and structural similarity based on the density functional theory(DFT)analysis,heterostructured combination ofα-Bi_(2)O_(3),perovskite-like Bi_(4)Ti_(3)O_(12),and sillenite Bi12TiO20 was designed for fabrication of charge transfer chain.By tuning the molar ratio of Bi and Ti precursors,the Bi_(4)Ti_(3)O_(12)and Bi12TiO20 particles were formed on the surface ofα-Bi_(2)O_(3)by an insitu transformation process,giving rise to Bi_(12)TiO_(20)-Bi_(4)Ti_(3)O_(12)/α-Bi_(2)O_(3)composites with charge transfer chain.We propose that the effective charge transfer is accomplished amongα-Bi_(2)O_(3),Bi12TiO20,and Bi_(4)Ti_(3)O_(12),which significantly improves the photogenerated charge separation and transfer,as indicated by photoluminescene,time-resolved photoluminescene,and electrochemical impedance spectra results.As expected,the Bi_(12)TiO_(20)-Bi_(4)Ti_(3)O_(12)/α-Bi_(2)O_(3)shows the superior photocatalytic activity for the degradation of environmental pollutants with high concentration.Even for the refractory pollutants like 4-chlorophenol,the optimal Bi_(12)TiO_(20)-Bi_(4)Ti_(3)O_(12)/α-Bi_(2)O_(3)composite shows 28 times higher than that ofα-Bi_(2)O_(3)for photocatalytic degradation,verifying the superiority of photogenerated charge transfer chain in photocatalysis.This work demonstrates the feasibility of the charge transfer chain strategy to boost the photogenerated charge separation,which is of great significance for designing energy and environmental-related materials in heterogonous photocatalysis.

关键词： photogenerated charge separation charge transfer chain bismuth titanates bismuth oxides

上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合畸形的矫治疗效

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

山东大学学报（医学版） 2024年第3期62卷 77-86页

作者：赵天然刘东旭山东大学齐鲁医学院口腔医学院·口腔医院正畸科山东省口腔组织再生重点实验室山东省口腔生物材料与组织再生工程实验室山东济南250012 中国人民解放军联勤保障部队第九六〇医院口腔科山东济南250031

目的通过锥形束断层扫描技术(cone beam computed tomography,CBCT)研究评价上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合横向不足的治疗效果。方法选择替牙期骨性Ⅲ类错牙合患儿19例,平均(8.47±0.70)岁。分别于上颌快速扩弓联合... 详细信息

目的通过锥形束断层扫描技术(cone beam computed tomography,CBCT)研究评价上颌快速扩弓联合前方牵引对替牙期骨性Ⅲ类错牙合横向不足的治疗效果。方法选择替牙期骨性Ⅲ类错牙合患儿19例,平均(8.47±0.70)岁。分别于上颌快速扩弓联合前方牵引治疗前(T_(1))及扩弓结束3个月后(T_(2))拍摄CBCT,测量上颌第一磨牙倾斜度、上颌前磨牙段及第一磨牙牙冠宽度、牙槽突宽度、上颌基骨宽度、牙槽嵴高度、第二前磨牙牙胚在牙槽骨中的位置等,比较治疗前后各测量项目的差异。结果从T_(1)到T_(2)阶段,上颌第一前磨牙牙冠宽度增加(2.37±3.47)mm(P=0.008),第二乳磨牙牙冠宽度增加量中位数为3.37 mm(P=0.009),第一磨牙牙冠宽度增加(2.60±2.53)mm(P<0.001),上颌第一前磨牙、第二乳磨牙、第一磨牙对应牙槽突宽度分别增加(1.63±2.45)mm(P=0.010)、(2.12±2.59)mm(P=0.002)、(1.98±2.10)mm(P<0.001),第一磨牙腭根根尖宽度、第一磨牙阻抗中心宽度分别增加(2.00±2.40)mm(P=0.002)、(2.00±2.07)mm(P<0.001),差异具有统计学意义;上颌第一磨牙倾斜度(P_(左)=0.196、P_(右)=0.251)、上颌基骨宽度(P=0.192)、下颌基骨宽度(P=0.266)及第一磨牙根分叉宽度(P=0.678)、上颌第一前磨牙牙槽骨高度(P=0.136)、第二乳磨牙牙槽骨高度(P=0.638)、第一磨牙牙槽骨高度(P=0.274)、第二前磨牙牙胚在牙槽骨中的相对位置(P=0.058)治疗前后差异均无统计学意义。结论上颌快速扩弓联合前方牵引可明显改善替牙期骨性Ⅲ类错牙合患儿中后段牙弓及颌骨横向不调,治疗对前磨牙牙胚在牙槽骨中的相对位置无影响。

关键词：替牙期骨性Ⅲ类错牙合上颌扩弓基骨宽度锥形束计算机断层扫描

在线全文

学校读者我要写书评

暂无评论

建筑设计中的文化元素融合方法探讨

陶瓷 2024年第6期 208-210页

作者：刘冬旭中国建筑技术集团有限公司北京100013

随着全球化进程的加速,建筑设计领域面临着文化同质化和失去地域特色的挑战。在建筑设计中有效融合文化元素,不仅能够传达深厚的文化内涵,还能增强建筑作品的地域特色。笔者探讨了在建筑设计中融合文化元素几种方法,包括历史与现代的对... 详细信息

随着全球化进程的加速,建筑设计领域面临着文化同质化和失去地域特色的挑战。在建筑设计中有效融合文化元素,不仅能够传达深厚的文化内涵,还能增强建筑作品的地域特色。笔者探讨了在建筑设计中融合文化元素几种方法,包括历史与现代的对话、本土文化与国际文化的交融以及跨领域的融合。有效的文化元素融合不仅能够提升建筑的美学价值,还能促进社会文化的可持续发展。

关键词：建筑设计文化元素融合方法地域特色

维普期刊数据库博看期刊

电动汽车用新型模块化聚磁转子永磁电机设计及其对比分析

在线全文

学校读者我要写书评

暂无评论

中国电机工程学报 2024年第3期44卷 1184-1194,I0028页

作者：王晶耿伟伟刘东旭吴彩权李磊李强郭健南京理工大学江苏省南京市210094

将轮辐型内置式转子和Halbach永磁阵列结合,并取消转子铁心加强筋,减小漏磁达到高聚磁同时兼顾凸极比,实现高转矩/功率密度和宽调速范围。在保证永磁体用量相同的情况下,建立新型高凸极比聚磁转子和V型转子两种电机模型,针对两者的分段... 详细信息

将轮辐型内置式转子和Halbach永磁阵列结合,并取消转子铁心加强筋,减小漏磁达到高聚磁同时兼顾凸极比,实现高转矩/功率密度和宽调速范围。在保证永磁体用量相同的情况下,建立新型高凸极比聚磁转子和V型转子两种电机模型,针对两者的分段转子拓扑,开展电磁性能对比分析,包括气隙磁密、凸极比、功率以及弱磁扩速能力等。同时,考虑到无转子铁心加强筋会导致转子分段存在结构强度问题,仿真验证新型高凸极比聚磁转子结构在最高转速6000 r/min时给予碳纤维护套保护下转子结构强度的可靠性;分析温度限制下新型高凸极比转子电机的功率输出。另外,对比两种不同电机结构的振动噪声情况。最后,研制一台16极/72槽新型高凸极比转子永磁电机样机,实验验证有限元分析结果的准确性。进一步说明了新型高凸极比转子永磁电机在转矩/功率密度和宽调速运行等方面的性能优势。

关键词：聚磁转子宽调速范围分段转子弱磁扩速碳纤维护套减小漏磁高凸极比

Pu在膨润土层中的反应性迁移模拟研究(1)——地下水-膨润土体系演化的地球化学模拟

在线全文

学校读者我要写书评

暂无评论

原子能科学技术 2024年第1期58卷 40-49页

作者：刘东旭黄流兴赵振华胡立堂司高华叶远虑西北核技术研究所陕西西安710024 北京师范大学水科学研究院地下水污染控制与修复教育部工程研究中心北京100875 生态环境部核与辐射安全中心北京100082

在某区含Pu高放废物处置系统的性能评价中,需要分析水-岩相互作用下蒙脱石、孔隙度、pH值等演化过程对膨润土材料性能及Pu反应性迁移的影响,为此,本文以工程屏障系统中厚度为1 m的柯尔碱膨润土回填材料为研究对象,基于地下水入渗景象,采... 详细信息

在某区含Pu高放废物处置系统的性能评价中,需要分析水-岩相互作用下蒙脱石、孔隙度、pH值等演化过程对膨润土材料性能及Pu反应性迁移的影响,为此,本文以工程屏障系统中厚度为1 m的柯尔碱膨润土回填材料为研究对象,基于地下水入渗景象,采用TOUGHREACT模拟了地下水-膨润土体系的地球化学演化。结果表明:膨润土完全饱和约需20年;膨润土中蒙脱石的伊利石化作用很弱,而去白云石化过程(白云石溶解、方解石形成)相对明显,这使得水中Ca^(2+)浓度减小、Mg^(2+)和HCO_(3)^(-)浓度增大、pH值呈弱碱性且维持在8.1~10.3范围内;膨润土的孔隙度和渗透率变化不明显(变化量不到2%)。这些演化过程将有利于维持膨润土的膨胀性,阻滞核素向外迁移。

关键词：柯尔碱膨润土地下水演化地球化学模拟 TOUGHREACT

Pu在膨润土层中的反应性迁移模拟研究(2)——Pu的种态分布及反应性迁移分析

在线全文

学校读者我要写书评

暂无评论

原子能科学技术 2024年第2期58卷 296-307页

为评估柯尔碱膨润土工程屏障材料的安全性能,采用考虑渗流扩散、溶解-沉淀、表面配位吸附、放射性衰变等多过程动态耦合的反应性迁移模拟方法,综合运用TOUGHREACT等程序开展了Pu在柯尔碱膨润土层中反应迁移的数值模拟,结合地下水-膨润... 详细信息

为评估柯尔碱膨润土工程屏障材料的安全性能,采用考虑渗流扩散、溶解-沉淀、表面配位吸附、放射性衰变等多过程动态耦合的反应性迁移模拟方法,综合运用TOUGHREACT等程序开展了Pu在柯尔碱膨润土层中反应迁移的数值模拟,结合地下水-膨润土体系演化模拟分析了Pu的种态分布特征,叠加表面配位模型预测分析了Pu的长期迁移规律。结果表明:地下水中Pu主要以难迁移的Pu(OH)_(4)(aq)形式存在;由于膨润土的低渗透性和强吸附性,正常情景下Pu的扩散范围很小而将长期滞留于1 m厚膨润土中;在忽略强吸附阻滞作用的保守情景下,Pu在渗流作用下可扩散迁移出膨润土层;考虑到长时间尺度下不可避免存在的不确定性,建议重视渗流扩散为主导的其他过程和情景研究。

关键词： Pu 反应性迁移模拟种态分布膨润土 TOUGHREACT

在线全文

学校读者我要写书评

暂无评论

基于磨粒分析的球轴承外圈剥落扩展特性研究

航空动力学报 2024年第6期39卷 29-36页

作者：杨景来卜嘉利佟文伟刘东旭郝延龙何山中国航发沈阳发动机研究所航空发动机动力传输重点实验室沈阳110015

为研究航空发动机球轴承外圈的剥落扩展特性,首先利用外圈含预制缺陷的球轴承开展零部件实验,再选取外圈存在剥落缺陷的球轴承在发动机上开展剥落扩展研究。综合利用滑油光谱、便携式铁谱、分析式铁谱及能谱分析技术对发动机滑油中的磨... 详细信息

为研究航空发动机球轴承外圈的剥落扩展特性,首先利用外圈含预制缺陷的球轴承开展零部件实验,再选取外圈存在剥落缺陷的球轴承在发动机上开展剥落扩展研究。综合利用滑油光谱、便携式铁谱、分析式铁谱及能谱分析技术对发动机滑油中的磨粒进行分析。结果表明:球轴承外圈的剥落扩展是渐进性的;表面存在沿长轴方向划痕的疲劳磨粒数量及比例随外圈的剥落发展而不断增加;磨粒总量及尺寸在剥落发展期出现明显增长,在快速扩展期急剧增加。结论:外圈的剥落首先出现在距凹坑一定距离的后方位置,沿滚珠的滚动方向扩展;剥落扩展分为4个阶段:裂纹萌生、裂纹扩展、裂纹贯穿及剥落扩展。

关键词：球轴承外圈剥落磨粒预制缺陷裂纹