检索结果-南通市图书馆

Ladder Time Stepwise Inertia Coordinated Control Method of Multiple Wind Farms to Suppress System Frequency Secondary Drop

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2024年第8期121卷 2293-2311页

作者： He li Xianchao liu jidong li Yuchen Qiu Tongliao PowerSupply Company State Grid East Inner Mongolia Electric Power CompanyTongliao028000China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Northeast Electric Power UniversityJilin132012China

Currently,both regulated and deregulated power trading exist in China’s power system,which has caused imbalanced funds in the electricity *** this paper,a simulation analysis of the electricity market with wind energy resources is conducted,and the calculation methods of unbalanced funds are investigated *** detail,the calculation formulas of unbalanced funds are illustrated based on their definition,and a two-track electricity market clearing model is ***,the concept of the dual-track system is explained,and the specific calculation formulas of various types of unbalanced funds are ***,considering the renewable energy consumption,the market clearing model based on DC power flow is constructed and solved;by combining fitting methods of mid-and long-term curves,the unbalanced funds are calculated based on clearing results and formulas.

关键词： Wind power stepwise inertial frequency control secondary drop

Oxygen-suppressed selective growth of monolayer hexagonal boron nitride on copper twin crystals

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 Research 2017年第3期10卷 826-833页

作者： Xuemei li Yao li Qin Wang Jun Yin jidong li Jin Yu Wanlin Guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devicesof the Ministry of Education and Institute of Nanoscience Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Controlled growth of hexagonal boron nitride （h-BN） with desired properties is essential for its wide range of applications. Here, we systematically carried out the chemical vapor deposition of monolayer h-BN on Cu twin crystals. It was found that h-BN nucleated and grew preferentially and simultaneously on the narrow twin crystal strips present in the Cu substrates. The density functional theory calculations revealed that the introduction of oxygen could effidently ~ne the selectivity. This is because of the reduction in the dehydrogenation barrier of the precursor molecules by the introduction of oxygen. Our findings throw light on the direct growth of functional h-BN nanoribbons on nano-twinned crystal strips and switching of the growth behavior of h-BN films by oxygen.

关键词： monolayer hexagonalboron nitride copper twin crystals oxygen selectivity chemical vapor deposition

Electrospinning/3D printing-integrated porous scaffold guides oral tissue regeneration in beagles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2024年第6期7卷 1000-1017页

作者： li Yuan Chen Yuan Jiawei Wei Shue Jin Yi Zuo Yubao li Xinjie liang jidong li Research Center for Nano-Biomaterials Analytical and Testing CenterSichuan UniversityChengdu 610064China ZXTGY(Jiangsu)Technology Co. Ltd.Suzhou 215400China

The combined use of guided tissue/bone regeneration(GTR/GBR)membranes and bone filling grafts represents a classical therapy for guiding the regeneration and functional reconstruction of oral soft and hard ***,due to its displacement and poor mechanical support,bone meal is not suitable for implantation in the case of insufficient cortical bone support and large dimensional *** combination of GTR/GBR membrane with a three-dimensional(3D)porous scaffold may offer a resolution for the repair and functional reconstruction of large soft and hard tissue *** this study,a novel integrated gradient biodegradable porous scaffold was prepared by bonding a poly(lactic-co-glycolic acid)(PLGA)/fish collagen(FC)electrospun membrane(PFC)to a 3D-printed PLGA/nano-hydroxyapatite(HA)(PHA)*** consistency of the composition(PLGA)ensured strong interfacial bonding between the upper fibrous membrane and the lower 3D *** vitro cell experiments showed that the PFC membrane(upper layer)effectively prevented the unwanted migration of L929 *** in vivo investigations with an oral soft and hard tissue defect model in beagles revealed that the integrated scaffold effectively guided the regeneration of defective oral *** results suggest that the designed integrated scaffold has great potential for guiding the regeneration and reconstruction of large oral soft and hard tissues.

关键词： Electrospinning 3D printing Gradient porous scaffold Oral tissue regeneration

Construction and Properties of Simvastatin and Calcium Phosphate Dual-Loaded Coaxial Fibrous Membranes with Osteogenic and Angiogenic Functions

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2022年第6期19卷 1645-1657页

作者： Chang liu Dan Deng Jing Gao Shue Jin Yi Zuo Yubao li jidong li Research Center for Nano-Biomaterials Analytical&Testing CenterSichuan UniversityChengdu610064China

The ideal Guided Bone Regeneration(GBR)membrane is required to have good biocompatibility,space maintenance ability,appropriate degradation rate,and preferably can guide the regeneration of vascularized bone *** this study,Simvastatin(SIM)and calcium Phosphate(CaP)were encapsulated in a Polycaprolactone(PCL)/Chitosan(CS)core-shell structural fibrous membranes via coaxial electrospinning *** results showed that loaded SIM in the core of the core-shell structure fibrous membranes could sustainably release the drug for more than two months and upregulate the angiogenic marker of Bone Mesenchymal Stem Cells(BMSCs).Adding a certain amount of CaP to the shell layer provided more sites for the mineralization and synergistic with SIM to promote osteogenic differentiation of BMSCs in *** intramuscular implantation experiments in rabbits suggested a normal early inflammation and enhanced vascularization induced by the SIM-loaded fibrous *** study proposed an effective strategy to prepare a dual-loaded core-shell fibrous membrane for guided vascularized bone tissue regeneration.

关键词： Simvastatin Calcium phosphate Coaxial electrospinning Vascularization Guided Bone Regeneration

Statistical characteristics of eukaryotic intron database

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Biology 2006年第4期1卷 362-366页

作者： HE Miao li jidong ZHANG Shanghong School of life Sciences Sun Yat-Sen UniversityGuangzhou 510275China The Key Laboratory of Gene Engineering of Ministry of Education and Biotechnology Research CenterSun Yat-Sen UniversityGuangzhou 510275China

A database called eukaryotic intron database(EID)was developed based on the data from *** on the statistical characteristics of EID show that there were 103,848 genes,478,484 introns,and 582,332 exons,with an average of 4.61 introns and 5.61 exons per *** of 40−120 nt in length were abundant in the *** of the statistical analysis on the data from nine model species showed that in eukaryotes,higher species do not necessarily have more introns or exons in a gene than lower ***,characteristics of EID,such as intron phase,distribution of different splice sites,and the relationship between genome size and intron proportion or intron density,have been studied.

关键词： eukaryote intron database statistical characteristics

Efficiency Analysis of an Arrayed liquid Piston Isothermal Air Compression System for Compressed Air Energy Storage

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 Thermal Science 2023年第1期32卷 17-29页

作者： HU Shiwei XU Weiqing JIA Guanwei CAI Maolin li jidong LU Yueke REN Teng School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Pneumatic and Thermodynamic Energy Storage and Supply Beijing Key Laboratory Beijing 100191China School of Physics&Electronics Henan UniversityKaifeng 475004China School of Mechanical Engineering Shenyang University of TechnologyShenyang 110870China

Compressed air energy storage(CAES)is an important technology in the development of renewable *** main advantages of CAES are its high energy capacity and environmental *** of the main challenges is its low energy density,meaning a natural cavern is required for air ***-pressure air compression can effectively solve the problem.A liquid piston gas compressor facilitates high-pressure compression,and efficient convective heat transfer can significantly reduce the compression energy consumption during air *** this paper,a near isothermal compression method is proposed to increase the surface area and heat exchange by using multiple tube bundles in parallel in the compression chamber in order to obtain high-pressure air using liquid-driven *** compression with a compression ratio of 6.25:1 is achieved by reducing the tube diameter and increasing the parallel tube number while keeping the compression chamber cross-sectional area constant in order to obtain a high-pressure air of 5 *** performances of this system are analyzed when different numbers of tubes are applied.A system compression efficiency of 93.0%and an expansion efficiency of 92.9%can be achieved when 1000 tubes are applied at a 1 minute period.A new approach is provided in this study to achieve high efficiency and high pressure compressed air energy storage.

关键词： liquid piston gas compressor compressed air energy storage convection heat transfer high-pressure air

The diameter factor of aligned membranes facilitates wound healing by promoting epithelialization in an immune way

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2022年第5期7卷 206-217页

作者： Chenbing Wang Chenyu Chu Xiwen Zhao Yang Yang Chen Hu li liu jidong li Yili Qu Yi Man Department of Oral Implantology&National Clinical Research Center for Oral Diseases&State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengduChina Research Center for Nano-Biomaterials Analytical and Testing CenterSichuan UniversityChengdu 610064China State Key Laboratory of Biotherapy West China HospitalSichuan UniversityCollaborative Innovation Center for BiotherapyChengduSichuan 610041China

Topographical properties,such as pattern and diameter,of biomaterials play important roles in influencing cell activities and manipulating the related immune response during wound *** prepared aligned electrospinning membranes with different fiber diameters,including 319±100 nm(A300),588±132 nm(A600),and 1048±130 nm(A1000),by adjusting the distance from the tip to the collector,the injection rate,and the concentration of the *** A300 membranes significantly improved cell proliferation and spreading and facilitated wound healing(epithelization and vascularization)with the regeneration of immature hair follicles compared to the other *** revealed the underlying molecular mechanism that A300 could promote immune-related processes towards a pro-healing direction,significantly promoting keratinocyte migration and skin wound *** the results indicated that wound healing requires the active participation of the immune process,and that A300 was a potential candidate for guided skin regeneration applications.

关键词： Aligned membranes Diameter Wound healing Epithelialization MMP12

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NRBO-SVM模型的月径流预测研究

水力发电 2025年第1期51卷 16-21页

作者：黎宇杰史国勇廖毅李基栋陈学毅黄炜斌国家能源集团四川发电有限公司南桠河水电分公司四川雅安625400 四川农业大学水利水电学院四川雅安625014 成都动能科技有限公司四川成都610041 四川大学水利水电学院四川成都610065

基于冶勒站多年月径流数据,以支持向量机(SVM)作为预测器,从模型输入、模型优化和输出环节探讨了提升月径流预测精度的方法。首先,比较了牛顿-拉夫逊优化算法(NRBO)与灰狼优化算法(GWO)在参数寻优方面的性能,发现均方误差(MSE)作为适应... 详细信息

基于冶勒站多年月径流数据,以支持向量机(SVM)作为预测器,从模型输入、模型优化和输出环节探讨了提升月径流预测精度的方法。首先,比较了牛顿-拉夫逊优化算法(NRBO)与灰狼优化算法(GWO)在参数寻优方面的性能,发现均方误差(MSE)作为适应度函数时NRBO表现更优。其次,进一步比较了逐月预测与分月预测的效能,结果显示逐月预测具有更高的预测准确性。此外,还从模型输出环节探索了组合预测输出的效果,发现能有效提升模型的泛化性能。而在数据预处理环节,经变分模态分解(VMD)预处理能大幅降低模型预测难度,同时显著提高预测精度。具体而言,GWO-VMD-NRBO-SVM相比单一模型,平均绝对百分比误差(MAPE)和归一化均方根误差(NRMSE)的降低幅度分别超过68%和79%,而纳什效率系数(NSE)提升超过15%。研究结果对非平稳月径流预测具有一定的参考价值。

关键词：月径流预测支持向量机参数优化变分模态分解

Hybrid hydrovoltaic electricity generation driven by water evaporation

在线全文

学校读者我要写书评

暂无评论

Nano Research Energy 2024年第2期3卷 47-55页

作者： Xuemei li Gu Feng Yiding Chen jidong li Jun Yin Wei Deng Wanlin Guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjing 210016China College of Material Science and Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Water evaporation is a ubiquitous natural process exploiting thermal energy from ambient *** technologies emerged in recent years offer one prospective route to generate electricity from water evaporation,which has long been ***,we developed a hybrid hydrovoltaic generator driven by natural water evaporation,integrating an“evaporation motor”with an evaporation-electricity device and a droplet-electricity device.A rotary motion of the“evaporation motor”relies on phase change of ethanol driven by water-evaporation induced temperature *** motion enables the evaporation-electricity device to work under a beneficial water-film operation mode to produce output of~4 V and~0.2μA,as well as propels the droplet-electricity device to convert mechanical energy into pulsed output of~100 V and~0.2 *** different types of hydrovoltaic devices require distinctive stimuli,it was challenging to make them work simultaneously,especially under one single driving *** here for the first time empower two types of hydrovoltaic devices solely by omnipresent water ***,this work presents a new pathway to exploiting water evaporation-associated ambient thermal energy and provides insights on developing hybrid hydrovoltaic generators.

关键词： hybrid hydrovoltaic generator ambient thermal energy evaporation motor water evaporation