检索结果-南通市图书馆

Journal of Renewable Materials 2020年第5期8卷 535-547页

作者： Fei Song Puyou jia Caiying Bo Xiaoli Ren Lihong Hu yonghong Zhou Institute of Chemical Industry of Forest Products Chinese Academy of ForestryNational Engineering Laboratory for Biomass Chemical UtilizationCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and MaterialsNanjing210042China Nanjing Forestry University Nanjing210037China

In this study,we prepared a series of tung oil phenolic foams(TPF)by a one-pot *** FT-IR and 1H NMR spectra confirm the successful Friedel-Crafts grafting of phenol to the long-chain alkyl group in tung *** TPFs exhibit enhanced mechanical properties,including compressive and flexural strengths of up to 0.278±0.036 MPa and 0.450±0.017 MPa,respectively,which represent increases of 68.75%and 86.72%over those of pure phenolic foam(PF).SEM spectra reveal the TPF microstructure to have uniform hexagonal cell morphology,narrower cell size distribution,and smaller mean cell size,suggesting enhanced mechanical *** TPF total smoke release decreased by 74.23%,indicating that the long alkyl chain significantly improves smoke suppression of the combusting ***,due to the flammability of the alkyl chains,the TPF limiting oxygen index decreases with increasing tung oil ***,TPF exhibits reduced thermal stability and high-temperature charring rate,elevated peak and mean heat release rates,and higher total heat release compared with pure ***,future research will focus on the use of tung oil modified flame retardant to provide more robust phenolic foams.

关键词： Tung oil Friedel-Craft reaction phenolic foams mechanical properties smoke suppression

Study on Toughening Phenolic Foams in Phosphorus-Containing Tung Oil-Based Derivatives

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 Renewable Materials 2019年第10期7卷 1011-1021页

作者： Fei Song Puyou jia Yanan Xiao Caiying Bo Lihong Hu yonghong Zhou Institute of Chemical Industry of Forest Products Chinese Academy of Forestry(CAF)National Engineering Laboratory for Biomass Chemical UtilizationCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and MaterialsNanjing210042China School of Petroleum and Chemical Engineering Dalian University of TechnologyDalian124221China

Phenolic foams(PFs)as thermal insulation material with outstanding flame retardancy are required to match society’s ever-expanding safety expectations;however,a trade-off exists between flame retardancy and ***,for the first time,we synthesized a novel reactive phosphorus-containing tung-oil-based derivative and used it to toughen PF,resulting in PFs with a combination of excellent mechanical properties and flame *** with pure PF,the modified PFs exhibit enhanced mechanical properties,with specific compressive and flexural strengths as high as 5.67 MPa and 12.46 MPa,which represent increases of 90.67%and 178.7%over those of pure PF,***,the limiting oxygen index(LOI)values of the modified PFs are improved as much as 40.83%.Scanning electron microscopy micrographs show that the microstructure of the modified PFs is better than that of pure PF,with a more uniform cell morphology,a narrower pore size distribution range,and a smaller average pore size,all of which are beneficial to the foam’s mechanical *** study provides a scientific paradigm for the development of advanced PFs based on renewable biological resources.

关键词： Tung oil phenolic foams toughen mechanical properties LOI

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于参数共享的篇章级蒙汉神经机器翻译

中央民族大学学报（自然科学版） 2024年第2期33卷 48-53页

作者：张根茂田永红郝佳张佳颖河南工学院智能工程学院河南新乡453000 内蒙古工业大学数据科学与应用学院内蒙古呼和浩特010080

针对传统蒙汉神经机器翻译缺少对篇章上下文的有效利用问题,构建了基于Transformer模型的篇章级蒙汉神经机器翻译模型,编码端使用相对注意力机制对多个句子检索全局上下文信息,解码端使用基于缓存的方法记录已翻译句子的相关信息,在预... 详细信息

针对传统蒙汉神经机器翻译缺少对篇章上下文的有效利用问题,构建了基于Transformer模型的篇章级蒙汉神经机器翻译模型,编码端使用相对注意力机制对多个句子检索全局上下文信息,解码端使用基于缓存的方法记录已翻译句子的相关信息,在预测当前句子的过程中,使用缓存的句子信息作为篇章上下文信息,同时利用分组策略共享层与层之间的参数,减少模型的参数量,在有限的内存中尽可能多地提高语料的利用率。实验结果表明,融合参数共享策略的篇章级模型比句子级Transformer模型在BLEU4上高8.7,比不加入参数共享的篇章级机器翻译模型在BLEU4上高2.49。

关键词：蒙汉神经机器翻译参数共享篇章上下文

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

近视父母与子女近视风险的Meta分析

眼科 2024年第5期33卷 368-376页

作者：宗晨曦胡健萍贾红艳焦永红首都医科大学附属北京同仁医院、北京同仁眼科中心、北京市眼科研究所、眼科学与视觉科学北京市重点实验室 100730

目的系统评价父母近视与子女近视风险之间的关系。设计Meta分析。研究对象46篇关于父母近视对子女近视影响的队列研究、病例对照研究和横断面研究。方法检索PubMed、Web of Science、Embase、中国知网、万方数据库、维普网、中国生物医... 详细信息

目的系统评价父母近视与子女近视风险之间的关系。设计Meta分析。研究对象46篇关于父母近视对子女近视影响的队列研究、病例对照研究和横断面研究。方法检索PubMed、Web of Science、Embase、中国知网、万方数据库、维普网、中国生物医学文献数据库、中华生物医学文献数据库、中华医学期刊全文数据库中从2000年1月至今2023年9月的关于父母近视对子女近视影响的研究。使用Cochrane手册对纳入文献进行偏倚风险评价及质量评价,并使用STATA 12.0软件进行Meta分析和偏倚检验。主要指标OR值。结果46篇文献共计纳入273376人,其中13项为队列研究,5项为病例对照研究,28项为横断面研究。Meta分析显示,父母中至少一方近视时的病例对照研究、队列研究、横断面研究,子女近视的OR值分别为1.73(95%CI,0.96~3.13)、2.05(95%CI,1.74~2.42)、2.51(95%CI,2.28~2.76);父母一方和双方近视时,子女近视的OR值分别为2.00(95%CI,1.84~2.18)、2.90(95%CI,2.46~3.42)。结论父母近视与儿童患近视的风险之间存在显著的正相关关系,父母一方或双方近视均会显著提高子女的近视风险,父母双方近视的子女相较于父母单方近视的子女近视风险更高。

关键词：近视父母近视 Meta分析

显微镜下颈前路零切迹融合系统与钛板融合系统治疗单节段颈椎病的早期疗效对比分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

骨科临床与研究杂志 2024年第3期9卷 158-162页

作者：刘小龙张嘉谭海清陈永红郴州市第三人民医院湘南学院第二附属医院脊柱外科 423000

目的探讨显微镜下应用零切迹融合系统与传统钛板融合系统治疗单节段颈椎病的临床疗效比较。方法分析郴州市第三人民医院脊柱外科于2015年1月至2022年11月在显微镜辅助下行颈前路椎间盘切除减压融合术(ACDF)治疗的单节段颈椎病患者,将应... 详细信息

目的探讨显微镜下应用零切迹融合系统与传统钛板融合系统治疗单节段颈椎病的临床疗效比较。方法分析郴州市第三人民医院脊柱外科于2015年1月至2022年11月在显微镜辅助下行颈前路椎间盘切除减压融合术(ACDF)治疗的单节段颈椎病患者,将应用Zero-p融合系统的患者列为研究组,将应用传统钛板融合系统的患者列为对照组。分别收集两组患者基本信息、手术时间、手术方式、出血量、术前和术后疼痛视觉模拟(VAS)评分、改良日本骨科学会(mJOA)评分、颈椎曲度、术后并发症等进行比较分析。结果比较研究组患者年龄[(53.1±9.2)岁]和手术出血量[(49.5±16.3)ml]与对照组患者年龄[(52.8±12.1)岁]、手术出血量[(49.0±13.6)ml]差异无统计学意义(P>0.05),但研究组患者男女比例分别为66.7%、33.3%,对照组患者男女比例分别为55%、45%,两组间差异有统计学意义(P0.05),然而研究组吞咽困难的发生率低于对照组。结论显微镜下辅助应用Zero-p融合固定系统与传统钛板融合固定系统行ACDF治疗单节段颈椎病均可获得良好的临床效果。与传统钛板融合系统相比,Zero-p融合固定系统不仅可获得类似临床疗效,且术后吞咽困难并发症发生率少,是单节段颈椎病治疗的一种术式选择。

关键词：颈椎病前路手术显微镜零切迹融合系统钛板融合系统

A global terrestrial ecosystem respiration dataset(2001-2010)estimated with MODIS land surface temperature and vegetation indices

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Big Earth Data 2020年第2期4卷 142-152页

作者： Jinlong Ai Shuyuan Xiao Hui Feng Huan Wang Gensuo jia.yonghong Hu Department of Biology and Information Engineering Yiyang Vocational&Technical CollegeYiyangChina Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina

This paper describes how a validated semi-empirical,but physiologically based,remote sensing model-Ensemble_all-was upscaled using MODIS land surface temperature data(MOD11C2),enhanced vegetation indices(MOD13C1)and land-cover data(MCD12C1)to produce a global terrestrial ecosystem respiration data set(Reco)for January 2001-December *** temporal resolution of this data set is 1 month,the spatial resolution is 0.05°,and the range is from 55°S to 65°N and 180°W to 180°E(crop and natural vegetation mosaic is not included).After crossvalidating our data set using in-situ observations as well as Reco outputs from an empirical variable_Q10 model,a LPJ_S1 process model and a machine learning method model,we found that our data set performed well in detecting both temporal and spatial patterns in Reco’s simulation in most ecosystems across the *** data set can be found at http://***/10.11922/sciencedb.934.

关键词： Terrestrial ecosystem respiration MODIS data product up-scaling remote sensing model

Synthesis of Bio-base Plasticizer Using Waste Cooking Oil and Its Performance Testing in Soft Poly(vinyl chloride)Films

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 Bioresources and Bioproducts 2019年第2期4卷 99-110页

作者： Guodong FENG Yan MA Meng ZHANG Puyou jia Chengguo LIU yonghong ZHOU Institute of Chemical Industry of Forest Products Chinese Academy of ForestNational Engineering Laboratory for Biomass Chemical UtilizationKey Laboratory of Biomass Energy and MaterialNanjing 210042China jiangsu Qianglin Bio-Energy and Bio-Materials Limited Company Liyang 213364JiangsuChina Co-Innovation Center of Efficient Processing and Utilization of Forest Resource Nanjing Forestry UniversityNanjing 210037China

Waste cooking oil was modified to prepare bio-base plasticizers(a,b and c)with terephthalic acid,adipic acid and benzoic acid by transesterification,epoxidation and ring opening reactions,*** polyvinyl chloride(PVC)films(a/PVC,b/PVC and c/PVC)were prepared using a,b and c as bio-base *** epoxidation and ring opening reactions were mainly investigated through GC-MS *** structures of bio-base plasticizers(a,b and c)were confirmed by Fourier transform infrared spectroscopy(FT-IR),^(1)H NMR and ^(13)C *** mechanical properties of a/PVC were as good as those of PVC films with the dioctyl phthalate(DOP)***,the elongation at break of c/PVC reached 422%.The glass transition temperature(Tg)from dynamic mechanical analysis(DMA)was reduced to 30.6℃,45.3℃,23.6℃and 40.6℃,respectively when 40 phr of a,b,c and DOP plasticizer were *** of thermogravimetric analysis(TGA)illustrated that the thermal degradation stabilitiy of a/PVC films was better than those of c/PVC and DOP/*** volatility losses of a,b and c were lower than that of the ***-base plasticizers a and c exhibited excellent migration resistance in different solutions(distilled water,50%ethanol(w/w)).The FT-IR of PVC films showed that the downfield shifts of the—CH—Cl groups of the PVC plasticized with a and c were greater than that of b/*** bio-base plasticizers b had a better plasticizing effect at low temperature.

关键词： bio-base plasticizer ring opening reaction glass transition temperature migration resistance polyvinyl chloride(PVC)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

奶山羊未来选育路径思考与建议

中国乳业 2024年第8期 14-18页

作者：令幸幸张毅陈辉张岩贾永宏陕西省畜牧产业试验示范中心陕西泾阳712100 陕西省农产品质量安全中心陕西西安710014 陕西省动物卫生与屠宰管理站陕西西安710014

畜禽种业是畜牧业发展的根基,是畜牧业核心竞争力的重要体现。奶山羊是我国重要的畜牧业品种之一,其优良经济性状表现出显著的遗传差异。本文通过综述奶山羊的品种资源、育种阶段和产业发展预测等,对羊种业与选育技术进展进行梳理与概述... 详细信息

畜禽种业是畜牧业发展的根基,是畜牧业核心竞争力的重要体现。奶山羊是我国重要的畜牧业品种之一,其优良经济性状表现出显著的遗传差异。本文通过综述奶山羊的品种资源、育种阶段和产业发展预测等,对羊种业与选育技术进展进行梳理与概述,展望了奶山羊未来选育路径,以期为奶山羊选育提供新的思路。

关键词：奶山羊选育遗传改良路径

基于全外显子组测序探寻Möbius综合征发病机制的遗传学研究

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中华眼科医学杂志（电子版） 2024年第3期14卷 146-154页

作者：贾红艳王丹张冉冉马茜焦永红首都医科大学附属北京同仁医院、北京同仁眼科中心、眼科学与视觉科学北京市重点实验室 100730 西安市人民医院(西安市第四医院)眼科、陕西省眼科医院西北大学附属人民医院 710004

目的:探讨Möbius综合征(MBS)患者的临床特征及可能的遗传发病机制。方法:收集2013年3月至2024年4月首都医科大学附属北京同仁医院眼科中心的14例(28只眼)散发MBS患者的病例资料。其中,男性5例(10只眼),女性9例(18只眼);年龄1~9岁,平均年... 详细信息

目的:探讨Möbius综合征(MBS)患者的临床特征及可能的遗传发病机制。方法:收集2013年3月至2024年4月首都医科大学附属北京同仁医院眼科中心的14例(28只眼)散发MBS患者的病例资料。其中,男性5例(10只眼),女性9例(18只眼);年龄1~9岁,平均年龄(4.0±0.7)岁。询问或检查并记录患者的性别、年龄、最佳矫正视力、眼球运动、眼前节和眼底、体格发育及颅神经眼眶磁共振成像(MRI)的情况。采集患者及核心家系成员外周静脉血、提取基因组脱氧核糖核酸(DNA)并在illumina平台行全外显子组测序。使用SAMtools和ANNOVAR软件对变异进行识别和注释,对频率数据库中频率低于1%的变异进行过滤。在此基础上,筛选新生突变基因以及≥2个以上患者共有的突变基因。使用R包的maftools和GenVisR软件包分别行共有基因突变特征分析并绘制景观图。年龄、最小分辨角对数(logMAR)视力以及每个样本携带的共有基因突变数量经Shapiro-Wilk检验符合正态分布,以±s表示。性别、单侧或双侧受累、全身发育异常、突变分类、突变类型、突变频谱及共有基因突变频率采用频数和百分比描述。使用R语言ClusterProfiler中的超几何检验进行基因本体(GO)富集分析,使用Benjamini-Hochberg方法进行多重假设检验校正并筛选显著富集的条目。结果:本研究9例(18只眼)患者的logMAR视力为0.56±0.12。双眼外转受限者有10例(20只眼),占71.43%(10/14);单眼外转受限者有4例(4只眼),占28.57%(4/14)。双侧面瘫者有5例,占35.7%(5/14);单侧面瘫者有9例,占64.3%(9/14)。伴其他全身发育异常的患者有9例,占64.29%(9/14)。双侧外展神经(CN6)发育不良者有11例,占78.57%(11/14);单侧CN6发育不良者有3例,占21.43%(3/14)。双侧面神经(CN7)发育不良者有9例,占64.3%(9/14),单侧CN7发育不良者有5例,占35.71%(5/14)。2例MBS患者发现致病候选基因丛状蛋白D1(PLXND1)新变异2个,分别为杂合错义变异c.C4207T、p.R1403W和剪切位点变异c.2937+6 G>T。14例患者共筛选出新生突变基因8个,分别为肌联蛋白(TTN)、碳酸酐酶9(CA9)、中间丝相关蛋白(RPTN)、SET结合因子2(SBF2)、丝状肌动蛋白结合蛋白(AFDN)、突触囊泡糖蛋白2C(SV2C)、神经丝蛋白重链(NEFH)和膜金属内肽酶样蛋白1(MMEL1)。≥2个以上患者共有的突变基因总计796个,突变数量为1987个。最常见的突变分类是错义突变,数量为1382个,占69.55%;最多见的突变类型是单碱基替换变异,数量为1534个,占77.20%;最常见的突变频谱是胞嘧啶被替换为胸腺嘧啶,数量为804个,占52.41%。每个样本所携带共有基因突变数量为126~161个,平均(141.93±11.35)个。按照突变频率排名,前10位的共有基因分别为B黑色素瘤抗原家族成员2/3/4/5(BAGE2/3/4/5)、与内体分选复合物Ⅲ相关的钠耐受增加1(IST1)、TTN、高尔基体蛋白A6家族样蛋白2(GOLGA6L2)、NEFH、UBX结构域蛋白11(UBXN11)、二氢硫辛胺支链转酰基酶E2(DBT)、羰基还原酶4(CBR4)、肌动蛋白相关蛋白3C(ACTR3C)和含V-Set免疫球蛋白域蛋白2(VSIG2),频率分别为100%、93%、64%、64%、57%、50%、50%、50%、50%和43%。经GO数据库中的生物学过程数据库注释,在本研究全部MBS患者14例(28只眼)中发现的共有突变基因集的基因数量为701个,查询GO数据库获得背景基因集的基因数量为18722个。比较不同通路的注释基因在此两个基因集中分布的差异,将其概率值按照升序排列,显著富集的通路依次为调控小谷氨酰胺转肽酶介导的信号转导、基于微管的运动、轴突发生、眼形态发生、通过质-膜粘附分子的细胞间粘附、肌动球蛋白结构组装、肌原纤维的组装及微管束的合成,其概率值依次为0.0002、0.004、0.004、0.004、0.004、0.004、0.011及0.011。结论:MBS患者的临床表型异质性较强,多数患者伴随有除面瘫和眼球外转受限以外的多发先天畸形。基于全外显子组测序的生物信息学分析结果提示参与神经发育和轴突生长过程的多个基因和生物学过程可能与MBS发病相关,进一步揭示了遗传因素在MBS发病中的作用。

关键词： Mobius综合征全外显子组测序生物信息学分析遗传发病机制

Traditional Chinese Medicine Automated Diagnosis Based on Knowledge Graph Reasoning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第4期71卷 159-170页

作者： Dezheng Zhang Qi jia Shibing Yang Xinliang Han Cong Xu Xin Liu yonghong Xie School of Computer&Communication Engineering University of Science&Technology BeijingBeijing100083China Beijing Key Laboratory of Knowledge Engineering for Materials Science Beijing100083China Inspur Electronic Information Industry Co. Ltd.&State Key Laboratory of High-End Server&Storage TechnologyJinan250101China Surgical Simulation Research Lab Department of SurgeryUniversity of AlbertaEdmontonT6G 2E1AlbertaCanada

Syndrome differentiation is the core diagnosis method of Traditional Chinese Medicine(TCM).We propose a method that simulates syndrome differentiation through deductive reasoning on a knowledge graph to achieve automated diagnosis in *** analyze the reasoning path patterns from symptom to syndromes on the knowledge *** are two kinds of path patterns in the knowledge graph:one-hop and *** one-hop path pattern maps the symptom to syndromes *** two-hop path pattern maps the symptom to syndromes through the nature of disease,etiology,and pathomechanism to support the diagnostic *** the different support strengths for the knowledge paths in reasoning,we design a dynamic weight *** utilize Naïve Bayes and TF-IDF to implement the reasoning method and the weighted score *** proposed method reasons the syndrome results by calculating the possibility according to the weighted score of the path in the knowledge graph based on the reasoning path *** evaluate the method with clinical records and clinical practice in *** preliminary results suggest that the method achieves high performance and can help TCM doctors make better diagnosis decisions in ***,the method is robust and explainable under the guide of the knowledge *** could help TCM physicians,especially primary physicians in rural areas,and provide clinical decision support in clinical practice.

关键词： Traditional Chinese medicine automated diagnosis knowledge graph Naïve Bayes syndrome differentiation