检索结果-南通市图书馆

中华神经外科杂志(英文) 2024年第2期10卷 1-5页

作者： Yao Hong Yang Wenlei Tang Hao cheng yijun Lin Shaojian Wu Zhe Bao Department of Neurosurgery Center of Pituitary Tumor Ruijin Hospital Shanghai Jiao Tong University School of Medicine# Ruijin Er Road Shanghai China

Background Trigeminal neuralgia (TN) is a common cause of craniofacial pain. The retrosigmoid approach is usually used to treat TN, but no cases of endoscopic far-lateral supracerebellar infratentorial approach (EF-SCITA) were used to undergo operation for *** presentation Two patients were presented with severe facial pain and preliminary diagnosis was TN. Preoperative magnetic resonance imaging revealed that a superior cerebellar artery (SCA) compressed the trigeminal nerve in case 1, and a tumor located in the petrous apex extending into the Meckel’s cave compressed the trigeminal nerve in case 2. Operations were achieved through the EF-SCITA. The pain was totally relieved with no postsurgical complications in both *** We present the first two case reports of EF-SCITA to relieve classical and secondary TN successfully. The EF-SCITA can be a promising approach for treating TN.

关键词： Approach Endoscopic surgery Trigeminal neuralgia

Linear shallow neural network to accelerate transmitter dispersion eye closure quaternary(TDECQ) assessment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第4期67卷 337-338页

作者： Junjiang XIANG Zejun CHEN yijun cheng Hailin YANG Xuancheng HUO Meng XIANG Gai ZHOU Yuwen QIN Songnian FU Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of Technology School of Optical and Electronic Information Huazhong University of Science and Technology Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of Technology Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology

To support the ever-emerging capacity requirement of datacenter interconnection(DCI) applications, transmitter dispersion eye closure quaternary(TDECQ) has been proposed by IEEE802.3 standard [1], which is specifically employed for the four-level pulse amplitude modulation(PAM-4) signals. However, the traditional scheme of TDECQ assessment needs several iterative operations,

关键词： IEEE Standards

Sparse Filtering Based Intelligent Fault Diagnosis Using IPSO-SVM

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Sparse Filtering Based Intelligent Fault Diagnosis Using IPS...

Effects of nanopillars and surface coating on dynamic traction force

第36届中国控制会议

作者： Yingze Yang Pengcheng Xiao yijun cheng Xiaoyong Zhang School of Information Science and Engineering Central South University

ISBN: (纸本)9781538629185

Intelligent fault diagnosis has became a focus of fault diagnosis,which can quickly and efficiently process collected signals and obtain high accurate diagnosis ***,intelligent fault diagnosis subjects to a lot of prior *** this work,a novel method based on the sparse features is *** sparse features directly are extracted from raw mechanical vibration signals using unsupervised ***,Support Vector Machine optimized by Improved Particle Swarm（IPSO-SVM） is used to classify the health condition based on the sparse features for each *** introducing improved parameters into PSO algorithm,the global search ability of the PSO algorithm is *** proposed method is validated by a case of rolling element bearings *** the experiments,we set up fifteen datasets to verify the proposed *** results show that the proposed method can provide a simple and accurate fault diagnosis for bearing multi-faults.

关键词： Fault diagnosis Sparse filtering Support vector machine Improved particle swarm optimization

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2023年第1期9卷 177-190页

作者： yijun cheng Stella W.Pang Department of Electrical Engineering City University of Hong KongKowloonHong KongChina Centre for Biosystems Neuroscienceand NanotechnologyCity University of Hong KongKowloonHong KongChina

The extracellular matrix serves as structural support for cells and provides biophysical and biochemical cues for cell ***,material,and surface energy can regulate cell migration ***,the responses of MC3T3-E1 cells,including migration speed,morphology,and spreading on various platform surfaces,were ***(PDMS)micropost sensing platforms with nanopillars,silicon oxide,and titanium oxide on top of the microposts were fabricated,and the dynamic cell traction force during migration was *** relationships between various platform surfaces,migration behaviors,and cell traction forces were *** with the flat PDMS surface,cells on silicon oxide and titanium oxide surfaces showed reduced mobility and less *** the other hand,cells on the nanopillar surface showed more elongation and a higher migration speed than cells on silicon oxide and titanium oxide ***3T3-E1 cells on microposts with nanopillars exerted a larger traction force than those on flat PDMS microposts and had more filopodia and long *** the relationships between platform surface condition,migration behavior,and cell traction force can potentially lead to better control of cell migration in biomaterials capable of promoting tissue repair and regeneration.

关键词： coating traction surface

Mechanism of K/Ni Etching for Biochar-H_(2)O Gasification

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

Journal of Harbin Institute of Technology(New Series) 2024年第3期31卷 1-18页

作者： Zhenyu cheng Dongdong Feng Qi Shang yijun Zhao Wenda Zhang Shaozeng Sun School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Biomass-H_(2)O gasification is a complex thermochemical reaction,including three processes of volatile removal:homogeneous/heterogeneous reforming,biochar gasification and *** rate-determining step is biochar-H_(2)O gasification and etching so the DFT is carried out to see the catalytic role of different metal elements(K/Ni)in the zigzag biochar *** calculation results show that the gasification of biochar-H_(2)O needs to go through four processes:dissociative adsorption of water,hydrogen transfer(hydrogen desorption,hydrogen atom transfer),carbon dissolution and CO *** energy barrier indicated that the most significant step in reducing the activation energy of K is reflected in the hydrogen transfer step,which is reduced from 374.14 kJ/mol to 152.41 kJ/mol;the catalytic effect of Ni is mainly reflected in the carbon dissolution step,which is reduced from 122.34 kJ/mol to 84.8 kJ/*** existence of K causes the edge to have a stronger attraction to H and does not destroy theπbonds of biochar *** destruction ofπbonds is mainly due to the role of H free radicals,while the destruction ofπbonds will lead to easier C-C bond *** shows a strong attraction to O in OH,which forms strong Ni-O chemical *** can also destroy the aromatic structure directly,making the gasification easier to *** study explored the catalytic mechanism of K/Ni on the biochar-H_(2)O gasification at the molecular level and looked forward to the potential synergy of K/Ni,laying a foundation for experimental research and catalyst design.

关键词： Biochar Potassium-nickel catalysis H_(2)O gasification etching Quantum chemistry Transition state theory

维普期刊数据库

Harmonic mixing of Bi_2Sr_2CaCu_2O_(8+x)intrinsic junction at millimeter waveband

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第13期44卷 1191-1194页

作者： XU Weiwei, ZHOU Gandong, SHAN Wenlei, YOU Lixing, YANG Senzu, Jl Zhengming, FENG yijun, cheng Qiheng and WU PeihengDepartment of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China Nanjing University Department of Elecronic Scicncc and Engineering Nanjing China

Using intrinsic Josephson junctions in Ba2Sr2CaCu2O8+x single crystal, harmonic frequency mixing at 8 and 3 mm wavebands was successfully demonstrated at liquid nitrogen temperatures with harmonic numbers up to 68 and 50 respectively. The dependences of intermediate frequency output on the local oscillator power and dc bias were carefully studied.

关键词： Bi2Sr2CaCu2O8+χ intrinsic junction Josephson junction harmonic mixing intermediate frequency output.

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

俄罗斯经济衰退的内在原因分析

俄罗斯东欧中亚研究 2009年第6期 53-58页

作者：程亦军中国社会科学院俄罗斯东欧中亚研究所

近期俄经济大幅下滑的直接原因在于国际油价暴跌和全球流动性紧缩,而根本原因则在于其脆弱的金融体系、畸形的经济结构和不稳定的增长模式。在抵御危机方面俄面临一系列有利和不利因素,关键取决于俄政府如何趋利避害。当前,世界正在酝... 详细信息

近期俄经济大幅下滑的直接原因在于国际油价暴跌和全球流动性紧缩,而根本原因则在于其脆弱的金融体系、畸形的经济结构和不稳定的增长模式。在抵御危机方面俄面临一系列有利和不利因素,关键取决于俄政府如何趋利避害。当前,世界正在酝酿一场绿色能源革命,全球各大经济体均在制定新能源发展战略,改造能源消费结构,开发利用新型能源,努力摆脱国民经济对石油的依赖,一旦获得重大突破必将强烈震撼国际能源市场,给依靠石油支撑国民经济的国家带来巨大消极影响。如果俄不进行积极的经济结构和产业结构调整,在下一个新型经济增长期(新能源时代)到来之时难免再次落伍。

关键词：俄罗斯金融危机经济前景新能源

维普期刊数据库

Harnessing cytokine-induced killer cells to accelerate diabetic wound healing:an approach to regulating post-traumatic inflammation

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2024年第2期3卷 88-99页

作者： Yixi Yang cheng Zhang Yuan Jiang yijun He iawei Cai Lin Liang Zhaohuan Chen Sicheng Pan Chu Hua Keke Wu Le Wang Zhiyong Zhang Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University Guangdong Province Engineering Research Center for Biomedical EngineeringState Key Laboratory of Respiratory DiseaseDepartment of Orthopaedic SurgeryMedical Technology and Related Equipment Research for Spinal Injury TreatmentCity Key LaboratoryThe Third Affliated Hospital of Guangzhou Medical UniversitySchool of Biomedical EngineeringGuangzhou MedicalUniversityGuangzhouGuangdong510150P.R.China Department of Osteoarthropathy and Sports Medicine Panyu Central HospitalGuangzhou 511400P.R.China

Impaired immunohomeostasis in diabetic wounds prolongs infiammation and cytokine dysfunction,thus,delaying or pre-venting wound-surface *** clinical studies have been conducted on cytokine-induced killer(CIK)cells recently,as they can be easily proliferated using a straightforward,inex-pensive ***,the function of CIK cells in regulat-ing inflammatory environments has been drawing attention for clinical *** the current investigation,we discovered the regenerative capacity of these cells in the chal-lenging environment of wounds that heal poorly due to *** demonstrated that the intravenous injection of CIK cells can re-establish a proregenerative inflammatory *** *** accelerateskin healing in diabetic *** results indicated that CIK cell treatment affects macrophage polarization and restores the function regenerative cells under hyperglycemic *** novel cellular therapy offers a promising intervention for clinical applic tions through specific inflammatory regulation functions.

关键词： macrophage diabetic wound post-traumatic inflammation cytokine-induced killer cells vascularization