检索结果-南通市图书馆

Excitation curve calibration for the SSRF booster magnets and applications in the commissioning

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2008年第4期19卷 204-208页

作者： HOU Jie SUN Xiaoying CHEN Guangling zhou xuemei LI Haohu LIU Guimin Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

The Shanghai Synchrotron Radiation Facility (SSRF) is a low emittance third-generation synchrotron radiation light source under commissioning. The excitation curve calibration for the booster magnets is important to provide the magnet current configurations as reference. Calibration studies give the polynomial coefficients of each type of magnets and provide the magnet current configurations under different beam energies as beam is ramped at speed of 2 Hz. The applications of calibration in booster commissioning which show the accuracy of the magnetic excitation curve calibration are also discussed.

关键词：加速器核技术磁铁检测标准

在线全文

学校读者我要写书评

暂无评论

不同激素处理对软枣猕猴桃扦插效果的影响

中国林副特产 2024年第1期 1-3页

作者：周晓明李延海黄卓周雪梅王春丽黑龙江省尚志国有林场管理局尚志林场黑龙江尚志150600 黑龙江省尚志国有林场管理局黑龙江尚志150600

为了探索科学高效的软枣猕猴桃扦插育苗技术,研究了IAA、IBA和NAA三种生长激素及浓度处理对其扦插生根效果的影响。结果表明:三种激素对生根率、根系生长和新枝生长均有显著地促进作用,其中以IAA激素的增效作用最好。不同浓度处理中,以2... 详细信息

为了探索科学高效的软枣猕猴桃扦插育苗技术,研究了IAA、IBA和NAA三种生长激素及浓度处理对其扦插生根效果的影响。结果表明:三种激素对生根率、根系生长和新枝生长均有显著地促进作用,其中以IAA激素的增效作用最好。不同浓度处理中,以200 mg/L IAA处理的生根率最大为86.67%,侧根数量最大为13.8个,根系质量最优,根长和根粗分别为18.60 cm和1.83 mm,新枝生长最好,新枝长度为5.82 cm,芽眼数为11.0个。不同激素及浓度处理间软枣猕猴桃扦插的生根率、侧根数、根长、根粗、新枝长和芽眼数等生长指标均存在显著性差异。综上分析,寒地软枣猕猴桃扦插育苗中,200 mg/L IAA为最适宜激素处理,生根效果最优。

关键词：软枣猕猴桃扦插激素生根率

Research on Multi-Scale Feature Fusion Network Algorithm Based on Brain Tumor Medical Image Classification

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第6期79卷 5313-5333页

作者： Yuting zhou xuemei Yang Junping Yin Shiqi Liu Graduate School China Academy of Engineering PhysicsBeijing100000China Department of Computational Mathematics Beijing Institute of Applied Physics and Computational MathematicsBeijing100000China National Key Laboratory of Computational Physics Beijing100088China Shanghai Zhangjiang Institute of Mathematics Shanghai201203China

Gliomas have the highest mortality rate of all brain *** classifying the glioma risk period can help doctors make reasonable treatment plans and improve patients’survival *** paper proposes a hierarchical multi-scale attention feature fusion medical image classification network(HMAC-Net),which effectively combines global features and local *** network framework consists of three parallel layers:The global feature extraction layer,the local feature extraction layer,and the multi-scale feature fusion layer.A linear sparse attention mechanism is designed in the global feature extraction layer to reduce information *** the local feature extraction layer,a bilateral local attention mechanism is introduced to improve the extraction of relevant information between adjacent *** the multi-scale feature fusion layer,a channel fusion block combining convolutional attention mechanism and residual inverse multi-layer perceptron is proposed to prevent gradient disappearance and network degradation and improve feature representation *** double-branch iterative multi-scale classification block is used to improve the classification *** the brain glioma risk grading dataset,the results of the ablation experiment and comparison experiment show that the proposed HMAC-Net has the best performance in both qualitative analysis of heat maps and quantitative analysis of evaluation *** the dataset of skin cancer classification,the generalization experiment results show that the proposed HMAC-Net has a good generalization effect.

关键词： Medical image classification feature fusion transformer

切口注射曲安奈德预防剖宫产瘢痕增生的效果研究

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

中国美容医学 2024年第1期33卷 7-10页

作者：周学梅王少帅杜婧邹婧刘小丽方秀丽杨妍周芳孝感市第一人民医院产科湖北孝感432099 华中科技大学附属同济医院妇产科湖北武汉430030

目的:研究曲安奈德切口注射预防剖宫产瘢痕增生的效果。方法:选取2020年3月-2022年6月于笔者医院预接受剖宫产手术的600例产妇,采用随机数字表法分为观察组(n=300)和对照组(n=300)。术中观察组切口两侧局部小剂量曲安奈德皮内注射,对照... 详细信息

目的:研究曲安奈德切口注射预防剖宫产瘢痕增生的效果。方法:选取2020年3月-2022年6月于笔者医院预接受剖宫产手术的600例产妇,采用随机数字表法分为观察组(n=300)和对照组(n=300)。术中观察组切口两侧局部小剂量曲安奈德皮内注射,对照组切口两侧不实行任何注射,术后常规关闭切口。术后随访6个月,记录两组产妇瘢痕形态、疼痛程度、瘢痕美观度、线结反应、脂肪液化发生情况、局部皮肤症状发生情况及产妇满意度,并进行统计学分析。结果:术后3、6个月,观察组瘢痕长度均短于对照组(P<0.05),温哥华瘢痕量表(Vancouver scar scale,VSS)各评分及总分均低于对照组(P<0.05);术后1、3、6个月,观察组疼痛评分低于对照组(P<0.05);术后6个月,观察组患者瘢痕评价量表(Patient scar assessment scale,PSAS)和观察者瘢痕评价量表(Observer scar assessment scale,OSAS)评分均低于对照组(P<0.05);术后,观察组线结反应、脂肪液化发生率及局部皮肤症状总发生率均低于对照组(P<0.05);观察组产妇总满意率高于对照组(P<0.05)。结论:剖宫产产妇采用曲安奈德切口注射能有效缓解疼痛,改善瘢痕形态,临床效果肯定,不良反应轻微,有助于提高产妇满意度,值得临床推广。

关键词：曲安奈德剖宫产瘢痕增生切口注射

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

奶桑中的木脂素类成分研究

云南大学学报（自然科学版） 2024年第3期46卷 549-554页

作者：庞文慧丁玲周学梅武学文张兴杰张芮菡李晓莉肖伟烈云南大学药学院教育部自然资源药物化学重点实验室云南特色植物提取实验室云南省天然产物转化与应用重点实验室云南昆明650500

综合应用正相硅胶柱层析、凝胶柱色谱、大孔树脂柱层析等多种分离手段对奶桑(Morus macroura Miq)乙酸乙酯相进行分离纯化,并利用1D、2D NMR技术进行结构鉴定.共分离纯化得到9个木脂素类化合物,分别为moracin O(1),moracin P(2),moracin... 详细信息

综合应用正相硅胶柱层析、凝胶柱色谱、大孔树脂柱层析等多种分离手段对奶桑(Morus macroura Miq)乙酸乙酯相进行分离纯化,并利用1D、2D NMR技术进行结构鉴定.共分离纯化得到9个木脂素类化合物,分别为moracin O(1),moracin P(2),moracin M(3),moracin R(4),(-)-(7R,8S)-dehydrodiconiferyl alcohol(5),(+)-lariciresinol(6),balanophonin(7),(7S,8R)-5-methoxyl-balanophonin(8)和hedyotisol A(9),其中化合物1,4~9为首次从该植物中分离得到.此外对部分化合物(1~5,7,9)进行抗炎活性测试,结果表明化合物9具有较弱的抗炎活性.

关键词：奶桑化学成分木脂素抗炎活性

Mechanical Properties and Electronic Structures of M(M=Ti,V,Cr,Mn and Fe)Dopedβ-Si_(3)N_(4) from First-Principle

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 639-644页

作者：龙敏黄福祥 XU Liangyu LI xuemei YANG zhou LENG Yue MEI Shini School of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054China

The structures,mechanical properties and electronic structures of M metals(M=Ti,V,Cr,Mn and Fe)dopedβ-Si_(3)N_(4) were investigated by First-principles calculations within *** calculated lattice parameters ofβ-Si_(3)N_(4) were consistent with previous *** cohesive energy and formation enthalpy show that initialβ-Si_(3)N_(4) has the highest structural *** calculated elastic constant and the Voigt-Reuss-Hill approximation indicate that elastic moduli ofβ-Si_(3)N_(4) are slightly reduced by M *** on Poisson’s and Pugh’s ratio,β-Si_(3)N_(4) is a ductile material and the toughness ofβ-Si_(3)N_(4) increases with M doping,and Fe doping exhibited the best *** results of density of states,charge distributions and overlapping populations indicate thatβ-Si_(3)N_(4) has the strong covalent and ionic bond strength between N and Si.

关键词： first-principles β-Si_(3)N_(4) mechanical properties electronic structure

院内制剂糖网润燥丸改善早期糖尿病视网膜病变可能机制研究

在线全文

学校读者我要写书评

暂无评论

中医眼耳鼻喉杂志 2024年第1期14卷 36-39页

作者：周雪梅龚翠芬张力娜董丽丽殷朝辉迁安市中医医院河北迁安064400

目的观察糖网润燥丸对糖尿病视网膜病变期患者视力、眼底、血糖、及相关炎症因子的影响。方法回顾我院2021年1月1日至2021年4月30日收治糖尿病视网膜病变Ⅰ、Ⅱ、Ⅲ期患者60例,对照组患者口服羟苯磺酸钙分散片,治疗1组口服糖网润燥丸3... 详细信息

目的观察糖网润燥丸对糖尿病视网膜病变期患者视力、眼底、血糖、及相关炎症因子的影响。方法回顾我院2021年1月1日至2021年4月30日收治糖尿病视网膜病变Ⅰ、Ⅱ、Ⅲ期患者60例,对照组患者口服羟苯磺酸钙分散片,治疗1组口服糖网润燥丸3 g, 3/日,治疗2组于羟苯磺酸钙分散片基础上予糖网润燥丸口服,疗程为3月,治疗前后完善眼底照相,空腹血糖(FBG)、餐后2小时血糖(PG2h)及糖化血红蛋白(HbA1c)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、血管内皮生长因子(VEGF),评估治疗后临床效果。结果眼底改善情况治疗2组优于对照组及治疗1组(P<0.05),FBG、PG2h、HbA1c水平在治疗后2个治疗组均较对照组明显下降(P<0.05),IL-6、TNF-α、VEGF水平均明显降低,且治疗2组三项指标均明显低于治疗1组(P<0.05)。结论糖网润燥丸在提高糖尿病早期视网膜病变患者视力,改善眼底病变情况方面有积极作用,辅助降糖、减轻炎症反应可能是其发挥疗效的可能机制。

关键词：糖网润燥丸糖尿病视网膜病变炎症因子

HSA shrinkage optimizes the photostability of embedded dyes fundamentally to amplify their efficiency as photothermal materials

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第8期35卷 211-216页

作者： Yongkang Yue zhou Xu Kaiqing Ma Fangjun Huo xuemei Qin Kuanshou Zhang Caixia Yin Department Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China Department Modern Research Center for Traditional Chinese Medicine Shanxi UniversityTaiyuan 030006China Research Institute of Applied Chemistry Shanxi UniversityTaiyuan 030006China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China

Focused on the performance promotion of organic small molecular dyes based photothermal agents via non-chemical modification,we found that heat-assisted binding of human serum albumin(HSA)to the dye causes shrinkage of the protein and encapsulate the dye to form *** revolutionizes the photostability of small molecule dyes which further improves their photothermal conversion effi-ciency and tumor ablation performance as photothermal agents *** this work,the obtained photothermal agent named HSA-P2-T could accumulate in tumor and induce 22℃enhancement of the tumor in xenograft models upon ultra-low dose(0.1 W/cm^(2))laser irradiation,which,as far as we know,is the lowest laser dose used in vivo photothermal *** HSA-P2-T,we realized tumor ablation upon twice intravenous injections of the nanoparticles and four photothermal treatments.

关键词： Photothermal therapy Cyanine dyes Photostability Albumin Encapsulation

Systematic and long-term technical validity of toxicity determination and early warning of heavy metal pollution based on an automatic water-toxicity-determination-system

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2024年第8期18卷 59-71页

作者： Yue Yi Baoguo Wang xuemei Yi Fan Zha Haisen Lin Zhijun zhou Yanhong Ge Hong Liu School of Life Science Beijing Institute of TechnologyBeijing 100081China Institute of Environmental Biology and Life Support Technology School of Biological Science and Medical EngineeringBeihang UniversityBeijing 100191China Infore Environment Technology Group Foshan 528000China Jiangmen Ecological Environment Monitoring Station Jiangmen 529000China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou 510000China

Water toxicity determination with electrochemically active bacteria(EAB)shows promise for providing early warnings for heavy metal pollution in ***,thus far,only idealized tests with a few types of heavy metals have been *** this study,an automatic water-toxicitydetermination system with high technical maturity was established,and the toxicological properties of common heavy metals were systematically *** results demonstrated that the common heavy metals linearly inhibited EAB currents in the range of 0.1 mg/L to 0.5 mg/*** toxicity ranking of the tested heavy metals was Pb^(2+)>Tl^(3+)>Cu^(2+)>Cd^(2+)>Zn^(2+)>Ni^(2+)>Hg^(2+)>As^(3+).The toxicity interaction mainly exhibited an antagonistic effect in binary heavy metal *** system can accurately determine surface water toxicity and rapidly monitor heavy metal pollution,with good repeatability and a long ***,this study demonstrates that EAB are capable of long-term(>60 d)surface water quality monitoring and on-site early warning of heavy metal pollution.

关键词： Biological early warning system Electrochemically active bacteria Water toxicity determination Biosensor Heavy metal pollution Early warning