检索结果-南通市图书馆

Journal of Iron and Steel Research International 2018年第8期25卷 821-829页

作者： Jing Zhao Hong-gang Zhong Ke Han Ren-xing Li zhi-shuai xu Qi-jie Zhai Department of Mechanical and Electrical Engineering Tangshan University Tangshan 063000 Hebei China State Key Laboratory of Advanced Special Steel Shanghai University Shanghai 200444 China National High Magnetic Field Laboratory Florida State University Tallahassee 32310 USA

Solidification process of 231 t 30Cr2Ni4MoV ingot manufactured by slow cooling process was studied using experimental and numerical simulations, which tackled the problems of high cost and long period in large ingot studying. Based on the numerical results of large ingot, five characteristic locations under different temperature gradients and cooling rates chosen from the large ingot were simulated. The experiments were performed under the same temperature conditions as in numerical simulations with specialized instrument. The influences of temperature gradient in the solid-liquid interface and solidification rate on the size and morphology of solidification structure were analyzed at cooling rate ranging from 10-3 to 10 2℃ s-1. Solidification macrostructure and microstructure showed that no columnar dendrite was found in any specimen. The grain size and secondary dendrite arm spacing decreased at larger cooling rate, and the relationship between secondary dendrite arm spacing and local solidification time or cooling rate was determined.

关键词： Slow cooling rate - Simulation Secondary dendrite arm spacing Solidification time Grain size

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

屈原研究之我见

三峡大学学报（人文社会科学版） 2025年第1期47卷 13-17页

作者：徐志啸复旦大学中文系上海200433

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天... 详细信息

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天的爱国主义,不是同一概念。屈原属于堪与意大利但丁比肩的世界一流大诗人。从某种意义上可以说,楚辞姓“楚”,屈原姓“屈”。

关键词：屈原《离骚》改革家世界大诗人爱国主义

Zishenpingchan granules for the treatment of Parkinson＇s disease：a randomized,double-blind,placebo-controlled clinical trial

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2018年第7期13卷 1269-1275页

作者： Qing Ye Xiao-Lei Yuan Can-xing Yuan Hong-zhi Zhang xu-Ming Yang Department of Neurology LONGHUA Hospital Shanghai University of Traditional Chinese Medicine Shanghai China Department of Neurology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Shanghai China Acupuncture and Tuina College of Shanghai University of Traditional Chinese Medicine Shanghai China

Levodopa preparations remain the preferred drug for Parkinson＇s ***,long-term use of levodopa may lead to a series of motor *** studies have shown that the combination of levodopa and Zishenpingchan granules（consisting of Radix Rehmanniae preparata,Lycium barbarum,Herba Taxilli,Rhizoma Gastrodiae,Stiff Silkorm,Curcuma phaeocaulis,Radix Paeoniae Alba,Rhizoma Arisaematis,Scorpio and Centipede） can markedly improve dyskinesia and delay the progression of Parkinson＇s disease,with especially dramatic improvements of non-motor ***,the efficacy of this combination has not been confirmed by randomized controlled *** current study was approved by the Hospital Ethics Committee and was registered in the Chinese Clinical Trial Register（registration number：Chi CTR-INR-1701194）.From December 2014 to December 2016,128 patients（72 males and 56 females,mean age of 65.78 ± 6.34 years） with Parkinson＇s disease were recruited from the Department of Neurology of Longhua Hospital and Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine in *** were equally allocated into treatment and control *** addition to treatment with dopamine,patients in treatment and control groups were given Zishenpingchan granules or placebo,respectively,for 24 *** efficacy was assessed using the Unified Parkinson＇s Disease Rating Scale,on-off phenomenon,Hoehn-Yahr grade,Scales for Outcomes in Parkinson＇s disease–Autonomic,Parkinson＇s disease sleep scale,Hamilton Anxiety Scale,Hamilton Depression Scale,Mini-Mental State Examination,and the Parkinson＇s Disease Quality of Life *** neural networks were used to determine weights at which to scale these *** results demonstrated that Zishenpingchan granules significantly reduced the occurrence of motor complications,and were useful for mitigating dyskinesia and non-motor symptoms of Parkinson＇s *** combination of Chin

关键词： nerve regeneration levodopa motion complications non-motor symptoms traditional Chinese medicine treatment artificial neural networks Zishenpingchan granules randomized controlled trials neurodegenerative diseases neural regeneration

A data complementary method for thunderstorm point charge localization based on atmospheric electric field apparatus array group

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2021年第2期7卷 170-177页

作者： xu Yang Hongyan xing Collaborative Innovation Center for Meteorological Disaster Prediction and Evaluation Nanjing University of Information Science and TechnologyNanjing210044China Jiangsu Key Laboratory of Meteorological Detection and Information Processing Nanjing University of Information Science and TechnologyNanjing210044China

Data loss or distortion causes adverse effects on the accuracy and stability of the thunderstorm point charge *** solve this problem,we propose a data complementary method based on the atmospheric electric field apparatus array *** electric field component measurement model of the atmospheric electric field apparatus is established,and the orientation parameters of the thunderstorm point charge are *** on the mirror method,the thunderstorm point charge coordinates are obtained by using the potential distribution *** test the validity of the basic algorithm,the electric field component measurement error and the localization accuracy are *** the azimuth angle and the elevation angle,the localization parameters also include the distance from the apparatus to the thunderstorm *** on a primary electric field apparatus,we establish the array group of *** on this,the data measured by each apparatus is complementarily processed to regain the thunderstorm point charge *** results show that,compared with the radar map data,this method can accurately reflect the location of the thunderstorm point charge,and has a better localization ***,several observation results during thunderstorm weather have been presented.

关键词： Atmospheric electric field apparatus Array Thunderstorm point charge Data complementary

Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua Xiong xu Zhao Zonglin Liu He Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

基于多分支增强和融合注意力机制的水下图像增强算法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

陕西科技大学学报 2025年第1期43卷 193-202页

作者：姚斌韩典芝徐轩李婉陕西科技大学电子信息与人工智能学院陕西西安710021

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计... 详细信息

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计了青品色温修复模块和模糊恢复模块对水下图像进行色彩矫正和模糊恢复.然后,基于对多个分支特征的互补性考虑,采用循环合并策略将多个分支增强的特征利用自适应融合模块进行融合,逐步增强图像细节.最后,设计了融合注意力模块,用于深度挖掘图像在通道维度和像素维度的相关性矩阵,以提高增强图像的真实性.实验结果表明,与现有算法相比,提出的水下图像增强算法去模糊效果较好且颜色更真实,可以有效改善水下图像色偏和模糊的问题.

关键词：水下图像增强多分支增强融合注意力生成对抗网络

在线全文

学校读者我要写书评

暂无评论

火花室在低于大气压下的工作特性

高能物理与核物理 1981年第5期 554-557页

作者：鲁祖惠张希芝林华兴徐振业李友明郑州大学

本文研究了充Ne的平行板火花室在气压200—700毫米汞柱范围内探测效率与气压、间隙宽度和工作电压的关系;也研究了在此气压范围内火花室阈值电压与气压和间隙宽度的关系。实验表明:火花室的效率随气压P与间隙d乘积的增加和工作电压的增... 详细信息

本文研究了充Ne的平行板火花室在气压200—700毫米汞柱范围内探测效率与气压、间隙宽度和工作电压的关系;也研究了在此气压范围内火花室阈值电压与气压和间隙宽度的关系。实验表明:火花室的效率随气压P与间隙d乘积的增加和工作电压的增大而增加,火花室的阈值电压服从Paschen规律。

关键词：火花室平行板气压工作特性阈值电压

Mutations of N-Methyl-D-Aspartate Receptor Subunits in Epilepsy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2018年第3期34卷 549-565页

作者： xing-xing xu Jian-Hong Luo Department of Neurobiology Key Laboratory of Medical Neurobiology(Ministry of Health of China) Collaborative Innovation Center for Brain Science Zhejiang University School of Medicine

Epilepsy is one of the most common neurological diseases. Of all cases, 70%–80% are considered to be due to genetic factors. In recent years, a large number of genes have been identified as being involved in *** them, N-methyl-D-aspartate receptor（NMDAR）subunit-encoding genes represent a large proportion, suggesting an important role for NMDARs in epilepsy. In this review, we summarize and analyze the genotypes, functional alterations, and clinical aspects of NMDAR subunit mutations/variants identified from patients with *** data will help to throw light upon the pathogenicity of these NMDAR mutations and advance our understanding of the subtle and complicated role of NMDARs in epilepsy. It will also offer new insights into precision therapy for this disorder.

关键词： Epilepsy NMDA receptors Subunit Mutation

Feathered dinosaurs from China and the evolution of major avian characters

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2006年第1期1卷 4-11页

作者： xing xu Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of SciencesBeijingChina

Recent discoveries of feathered dinosaurs from Early Cretaceous deposits in Liaoning,China,have not only lent strongest support for the dinosaurian hypothesis of bird origins,but have also provided much-needed information about the origins of feathers and avian *** analysis of character evolution suggests that the major avian osteological characters were acquired during the early evolution of maniraptoran *** available evidence also suggests that the first feathers with a filamentous morphology probably evolved in basal coelurosaurs and pennaceous feathers(including those with aerodynamic features)were developed in non-avian maniraptorans,indicating that feathers evolved before the origin of birds and their *** evolutionary model is proposed here to describe the major stages of feather evolution,a process characterized by a combination of both transformational and innovative *** model is different from some recent developmental models,which suggest that feathers are evolutionary novelties without a homologous relationship to reptilian *** non-avian theropods are traditionally regarded as distinctly cursorial animals,recent discoveries suggest that the closest relatives of birds might be arboreal *** bird features,such as the furcula and pennaceous feathers,evolved in a terrestrial context,whereas others,such as some pedal modifications,may have evolved in an arboreal ***,arboreality may have also contributed to the origin of avian flight.

关键词： birds feathered dinosaurs feathers flight

Enhancement of motor functional recovery in thoracic spinal cord injury: voluntary wheel running versus forced treadmill exercise

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 836-844页

作者： Do-Hun Lee Dan Cao Younghye Moon Chen Chen Nai-Kui Liu Xiao-Ming xu Wei Wu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteIndiana University School of MedicineIndianapolisINUSA Department of Neurological Surgery Indiana University School of MedicineIndianapolisINUSA Department of Neuroscience Baylor College of MedicineHoustonTXUSA

Spinal cord injury necessitates effective rehabilitation strategies, with exercise therapies showing promise in promoting recovery. This study investigated the impact of rehabilitation exercise on functional recovery and morphological changes following thoracic contusive spinal cord injury. After a 7-day recovery period after spinal cord injury, mice were assigned to either a trained group(10 weeks of voluntary running wheel or forced treadmill exercise) or an untrained group. Bi-weekly assessments revealed that the exercise-trained group, particularly the voluntary wheel exercise subgroup, displayed significantly improved locomotor recovery, more plasticity of dopaminergic and serotonin modulation compared with the untrained group. Additionally, exercise interventions led to gait pattern restoration and enhanced transcranial magnetic motor-evoked potentials. Despite consistent injury areas across groups, exercise training promoted terminal innervation of descending axons. In summary, voluntary wheel exercise shows promise for enhancing outcomes after thoracic contusive spinal cord injury, emphasizing the role of exercise modality in promoting recovery and morphological changes in spinal cord injuries. Our findings will influence future strategies for rehabilitation exercises, restoring functional movement after spinal cord injury.

关键词： behavioral assessment motor function neural plasticity running wheel exercise spinal cord injury treadmill exercise voluntary exercise