检索结果-南通市图书馆

Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第6期42卷 838-850页

作者： Yu-Liang Yang Tai-Ran Zhang Yan-Ting Han Shao-Yun Guo Qin-gong rong Jia-Bin Shen State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China West China Hospital/West China School of Nursing Sichuan UniversityChengdu610041China Shandong Senrong New Materials Co. Ltd.Zibo256401China

In order to achieve efficient and durable oil-water emulsion separation,the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great *** present study,a kind of polytetrafluoroethylene(PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE(fPTFE)on an expanded PTFE(ePTFE)*** morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning *** addition of appropriate polyoxyethylene(PEO)would make the fibers in the fPTFE layer finer and more *** a result,the compounded membrane exhibited a small pore size of approximately 1.25µm and a substantial porosity nearing 80%.This led to super-hydrophobicity,characterized by a high water contact angle(WCA)of 149.8°,and facilitated rapid oil *** water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%,but such an outstanding separation capacity could be largely retained,either through multiple cycles of use or through strong acid(pH=1),strong alkali(pH=12),or high-temperature(100°C)***,the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume *** significantly,the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE ***,this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics,showing promise for applications in the realm of emulsion separation.

关键词： ePTFE Electrospinning membrane Bilayer compounding Emulsion separation

A 9.5-kb deletion in the 1st intron of OsMADS51 enhances temperature sensitivity in rice

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2024年第4期12卷 1031-1040页

作者： Lei Zhao Haifei Hu Junyu Chen Chongrong Wang Yibo Chen Hong Li Daoqiang Huang Zhidong Wang Degui Zhou rong gong Yangyang Pan Junliang Zhao Liangyong Ma Shaochuan Zhou Rice Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina State Key Laboratory of Rice Biology and Chinese National Center for Rice Improvement China National Rice Research InstituteHangzhou 310006ZhejiangChina Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510640GuangdongChina Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China(Co-construction by Ministry and Province) Ministry of Agriculture and Rural AffairsGuangzhou 510640GuangdongChina Guangdong Rice Engineering Laboratory Guangzhou 510640GuangdongChina Guangdong Key Laboratory of New Technology in Rice Breeding Guangzhou 510640GuangdongChina

Temperature is an important environmental factor affecting heading date of *** its importance,genes responsible for temperature-sensitive heading in rice have remained *** previous study identified a quantitative trait locus qHd1 which advances heading date under high temperatures.A 9.5-kb insertion was found in the first intron of OsMADS51 in indica variety Zhenshan 97(ZS97).However,the function of this natural variant in controlling temperature sensitivity has not been *** this study,we used CRISPR/Cas9 to knock out the 9.5-kb insertion in *** conducted under cotrolled conditions in phytotrons confirmed that deletion increased temperature sensitivity and advanced heading by downregulating the expression level of ***-hybrid assays in yeast,ChIP-quantitative polymerase chain reaction,electrophoretic mobility shift,and luciferase-based transient transactivation assays collectively confirmed that OsMADS51 affects heading date by regulation of heading date gene *** further determined that the long non-coding RNA HEATINR is generated from the first intron of OsMADS51,offering an explanation for how the 9.5-kb insertion affects temperature *** also found that OsMADS51 was strongly selected in early/late-season rice varieties in South China,possibly accounting for their strong temperature *** insights not only advance our understanding of the molecular mechanisms underlying the temperature-responsive regulation of heading date in rice but also provide a valuable genetic target for molecular breeding.

关键词： OsMADS51 Insertion Long non-coding RNA Oryza sativa

在线全文

学校读者我要写书评

暂无评论

高职教育专业质量保障体系发展思考

湖北开放职业学院学报 2024年第1期37卷 66-67,70页

作者：宫蓉烟台职业学院山东烟台264000

高职教育专业质量成为职业教育发展的重要保障。当前,在职业教育内涵式发展进程中,由注重人才规模和数量,转变为更加关注专业发展质量,表明高职教育专业质量成为院校可持续发展的核心要素。为构建完善的专业质量保障体系,了解具体影响... 详细信息

高职教育专业质量成为职业教育发展的重要保障。当前,在职业教育内涵式发展进程中,由注重人才规模和数量,转变为更加关注专业发展质量,表明高职教育专业质量成为院校可持续发展的核心要素。为构建完善的专业质量保障体系,了解具体影响专业质量的影响因素,结合当前质量保障体系建设的不足,积极探索解决的路径。从人才培养模式、师资队伍建设、质量监控评估等方面,提出具体的优化策略,阐述质量保障体系优化建设的路径。

关键词：高职教育专业质量保障体系

战略学习、组织敏捷性与机会迭代——基于数字化新创企业的实证研究

在线全文

学校读者我要写书评

暂无评论

外国经济与管理 2024年第7期46卷 22-37页

作者：郭润萍龚蓉陆鹏吉林大学商学与管理学院吉林长春130012

本文根据组织学习理论和社会建构理论,嵌入数字创业情境,探索战略学习对数字化新创企业机会迭代的影响机制。结果表明:战略学习有助于推动数字化新创企业机会迭代;战略学习可以通过提升组织敏捷性(创业敏捷性和适应敏捷性)促进数字化新... 详细信息

本文根据组织学习理论和社会建构理论,嵌入数字创业情境,探索战略学习对数字化新创企业机会迭代的影响机制。结果表明:战略学习有助于推动数字化新创企业机会迭代;战略学习可以通过提升组织敏捷性(创业敏捷性和适应敏捷性)促进数字化新创企业机会迭代;随着技术动荡性的提高,创业敏捷性对数字化新创企业机会迭代的积极作用增强,而适应敏捷性对数字化新创企业机会迭代的积极作用没有显著变化。本研究以组织敏捷性作为关键路径揭示了战略学习对数字化新创企业机会迭代的作用机理,研究结论有助于推动创业机会研究的发展,打开战略学习对数字化新创企业机会迭代作用机制的黑箱,丰富了组织敏捷性作用的情境化研究,为推动我国数字化新创企业的可持续发展提供实践指导。

关键词：战略学习创业敏捷性适应敏捷性机会迭代数字化新创企业

非制冷势垒型InAsSb基高速中波红外探测器

在线全文

学校读者我要写书评

暂无评论

红外与毫米波学报 2024年第2期43卷 166-173页

作者：贾春阳邓功荣赵鹏朱之贞赵俊张逸韵中国科学院半导体研究所半导体照明研发中心北京100083 昆明物理研究所云南昆明650223 中国科学院大学材料科学与光电技术学院北京100049 陆装驻重庆军代局驻昆明地区第一军代室云南昆明650000

高速响应的中波红外探测器在自由空间光通信和频率梳光谱学等新兴领域的需求逐渐增加。中长波XBnn势垒型红外光探测器对暗电流等散粒噪声具有显著抑制作用。本文在GaSb衬底上采用分子束外延技术生长了nBn和pBn两种结构的InAsSb/AlAsSb/A... 详细信息

高速响应的中波红外探测器在自由空间光通信和频率梳光谱学等新兴领域的需求逐渐增加。中长波XBnn势垒型红外光探测器对暗电流等散粒噪声具有显著抑制作用。本文在GaSb衬底上采用分子束外延技术生长了nBn和pBn两种结构的InAsSb/AlAsSb/AlSb中波红外光探测器材料,并通过微纳加工工艺制备了可用于射频响应特性测试的GSG结构探测器。XRD和AFM的测试结果表明,两种结构的外延片都具有较好的晶体质量。器件暗电流测试结果表明,相较于nBn器件,在室温和反向偏压400 mV的工作条件下,直径90μm的pBn器件表现出更低的暗电流密度0.145 A/cm^(2),说明该器件在室温非制冷环境下表现出较低的噪声水平。不同台面直径的探测器的暗电流测试表明,pBn器件的表面电阻率低于对照的nBn器件的表面电阻率。另外,根据探测器的电容测试结果,可零偏压工作的pBn探测器具有完全耗尽的势垒层和部分耗尽的吸收区,nBn的吸收区也存在部分耗尽。探测器的射频响应特性表明,直径90μm的pBn器件的响应速度在室温和3 V反向偏压下可达2.62 GHz,对照的nBn器件的响应速度仅为2.02 GHz,响应速度提升了29.7%,初步实现了在中红外波段下可快速探测的室温非制冷势垒型光电探测器。

关键词： InAsSb基非制冷高速中波红外势垒型探测器

企业—用户互动、敏捷开发与数字产品创新绩效

在线全文

学校读者我要写书评

暂无评论

研究与发展管理 2024年第1期36卷 108-120页

作者：郭润萍冯子晴龚蓉王远吉林大学商学与管理学院长春130012

数字技术的可重新编程性、开放性等特征增强了市场需求的不确定性,企业通过与用户互动进行敏捷开发以提升数字产品创新绩效,成为获取竞争优势的关键。基于精益创业理论和利益相关者理论,深入分析企业—用户互动、敏捷开发与数字产品创... 详细信息

数字技术的可重新编程性、开放性等特征增强了市场需求的不确定性,企业通过与用户互动进行敏捷开发以提升数字产品创新绩效,成为获取竞争优势的关键。基于精益创业理论和利益相关者理论,深入分析企业—用户互动、敏捷开发与数字产品创新绩效间的作用机理。结果表明:企业—用户互动通过敏捷开发积极影响数字产品创新绩效,且组织创新氛围将增强三者间的作用关系。研究有助于丰富对于数字情境下企业—用户互动创新的理解,推动敏捷开发研究的发展,为解释数字产品创新绩效差异化提供有价值的研究思路,也为数字产品创新绩效的提升提供重要的管理启示。

关键词：企业—用户互动敏捷开发数字产品创新绩效组织创新氛围利益相关者精益创业

去甲基化药物对骨髓增生异常综合征伴骨髓纤维化患者的疗效分析

在线全文

学校读者我要写书评

暂无评论

临床血液学杂志 2024年第5期37卷 333-338页

作者：祝坤张婕贡蓉山西医科大学第三医院山西白求恩医院山西医学科学院同济山西医院太原030032

目的:探究去甲基化药物(hypomethylating agent,HMA)在骨髓增生异常综合征(myelodysplastic syndrome,MDS)伴或不伴骨髓纤维化(MF)患者治疗中的临床效果。方法:收集山西白求恩医院2017年1月—2023年9月收治的147例MDS患者,其中MF 0级患... 详细信息

目的:探究去甲基化药物(hypomethylating agent,HMA)在骨髓增生异常综合征(myelodysplastic syndrome,MDS)伴或不伴骨髓纤维化(MF)患者治疗中的临床效果。方法:收集山西白求恩医院2017年1月—2023年9月收治的147例MDS患者,其中MF 0级患者50例,MF 1~3级患者97例。根据骨髓纤维化的严重程度将接受HMA单药治疗的患者分为2组,非纤维化组(MF 0级)27例,纤维化期组(MF 1~3级)59例;根据是否接受HMA单药治疗将MF 1~3级患者分为2组,支持治疗组30例,HMA单药治疗组59例。分别比较2组患者的年龄、性别、血液学指标(白细胞计数、中性粒细胞计数、血红蛋白、血小板计数)、骨髓原始细胞比例、根据IPSS-R与IPSS-M的危险分层、WHO 2016分型、基因突变(TP53、ASXL1、U2AF1、DNMT3A、SF3B1、TET2、JAK2、RUNX1)以及治疗疗效。结果:非纤维化组与纤维化期组年龄、白细胞计数、中性粒细胞计数、血红蛋白、骨髓原始细胞比例、根据IPSS-R与IPSS-M的危险分层以及基因突变比较,差异无统计学意义(P>0.05),性别、血小板计数、中位总生存期(overall survival,OS)与中位无进展生存期(progression-free survival,PFS),差异有统计学意义(P0.05);支持治疗组与HMA单药治疗组的年龄、性别、白细胞计数、中性粒细胞计数、血红蛋白以及中位OS、中位PFS比较,差异无统计学意义(P均>0.05),血小板计数、骨髓原始细胞比例、根据IPSS-R及IPSS-M的危险分层、WHO 2016分型、基因突变(ASXL1、TET2)差异有统计学意义(P<0.05)。结论:MDS中骨髓纤维化与预后不良有关。接受HMA单药治疗并不能改善MDS伴骨髓纤维化患者的预后,并且接受HMA单药治疗并不能延长MDS伴骨髓纤维化患者的OS和PFS。

关键词：去甲基化药物骨髓增生异常综合征骨髓纤维化

Investigation on p-type doping of PBn unipolar barrier InAsSb photodetectors

在线全文

学校读者我要写书评

暂无评论

红外与毫米波学报 2024年第4期43卷 472-478页

作者： ZHANG Jian CHANG Chao LI Hong-Fu SHI Yu-Na YIN Han-Xiang LI Yan-Hui YUE Biao WANG Hai-Peng YAN Chang-Shan DAI Xin-Ran DENG gong-rong KONG Jin-Cheng ZHAO Peng ZHAO Jun Kunming Institute of Physics Kunming 650223China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

The lattice-matched XBn structures of InAsSb,grown on GaSb substrates,exhibit high crystal quali⁃ty,and can achieve extremely low dark currents at high operating temperatures(HOT).Its superior performance is attributed to the unipolar barrier,which blocks the majority carriers while allowing unhindered hole *** further explore the energy band and carrier transport mechanisms of the XBn unipolar barrier structure,this pa⁃per systematically investigates the influence of doping on the dark current,photocurrent,and tunneling character⁃istics of InAsSb photodetectors in the PBn *** high-quality InAsSb samples with unintentionally doped absorption layers(AL)were prepared,with varying p-type doping concentrations in the GaSb contact layer(CL)and the AlAsSb barrier layer(BL).As the p-type doping concentration in the CL increased,the device’s turn-on bias voltage also increased,and p-type doping in the BL led to tunneling occurring at lower bias *** the sample with UID BL,which exhibited an extremely low dark current of 5×10^(-6) A/cm^(2).The photocurrent characteristics were well-fitted using the back-to-back diode model,revealing the presence of two opposing space charge regions on either side of the BL.

关键词： InAsSb PBn p-type doping dark current

Multi-class classification method for strip steel surface defects based on support vector machine with adjustable hyper-sphere

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2018年第7期25卷 706-716页

作者： Mao-xiang Chu Xiao-ping Liu rong-fen gong Jie Zhao School of Electronic and Information Engineering University of Science and Technology Liaoning Anshan 114051 Liaoning China Department of Electrical Engineering Lakehead University Thunder Bay P7B 5E1 ON Canada State Key Laboratory of Robotics and System (HIT) Harbin 150001 Heilongjiang China

Focusing on strip steel surface defects classification, a novel support vector machine with adjustable hyper-sphere （AHSVM） is formulated. Meanwhile, a new multi-class classification method is proposed. Originated from support vector data description, AHSVM adopts hyper-sphere to solve classification problem. AHSVM can obey two principles： the margin maximization and inner-class dispersion minimization. Moreover, the hyper-sphere of AHSVM is adjustable, which makes the final classification hyper-sphere optimal for training dataset. On the other hand, AHSVM is combined with binary tree to solve multi-class classification for steel surface defects. A scheme of samples pruning in mapped feature space is provided, which can reduce the number of training samples under the premise of classification accuracy, resulting in the improvements of classification speed. Finally, some testing experiments are done for eight types of strip steel surface defects. Experimental results show that multi-class AHSVM classifier exhibits satisfactory results in classification accuracy and efficiency.

关键词： Strip steel surface defect Multi-class classification Supporting vector machine Adjustable hyper-sphere