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Thermodynamic and economic analyses of a coal and biomass indirect coupling power generation system

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Frontiers in Energy 2020年第3期14卷 590-606页

作者： Buqing YE Rui ZHANG jin cao Bingquan SHI Xun ZHOU Dong LIU MIIT Key Laboratory of Thermal Control of Electronic Equipment and Advanced Combustion LaboratorySchool of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China

The coal and biomass coupling power genera-tion technology is considered as a promising technology for energy conservation and emission *** this paper,a novel coal and biomass indirect coupling system is proposed based on the technology of biomass gasification and co-combustion of coal and gasification *** the sake of comparison,a coal and biomass direct coupling system is also introduced based on the technology of co-combustion of coal and *** process of the direct and the indirect coupling system is *** thermodynamic and economic performances of two systems are analyzed and *** simulation indicates that the thermodynamic performance of the indirect coupling system is slightly worse,but the economic performance is better than that of the direct coupling *** the blending ratio of biomass is 20%,the energy and exergy fficiencies of the indirect coupling system are 42.70%and 41.14%,the intemal rate of returm(IRR)and discounted payback period(DPP)of the system are 25.68%and 8.56 *** price fluctuation of fuels and products has a great influence on the economic performance of the indirect coupling *** environmental impact analysis indicates that the indirect coupling system can inhibit the propagation of NOx and reduce the environmental cost.

关键词： biomass indirect coupling system process simulation thermodynamic analysis economic analysis

Modified Magnetohydrodynamic Model of Magnetic Reconnection

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Chinese Physics Letters 1999年第6期16卷 461-463页

作者： ZHOU Guo-cheng CAI Chun-lin cao jin-bin ZHANG Yang-ting CHEN Tao WANG De-ju Center for Space Science and Applied Research Chinese Academy of SciencesBeijing 100080

This paper presents the modified magnetohydrodynamic(MHD)model and simulations of solar wind-magnetosphere *** use the two-dimensional and three-component,compressible,resistive,ion gyroviscous and Hall MHD model,i.e.,including the ion Unite Larmor radius(FLR)and Hall MHD effects,but neglecting the electron inertia and electron FLR *** composed dynamic pressure pulses(shear variations in the How velocity)in the solar wind form gusts that continually buffet the magnetosphere and cause the time-dependent magnetic reconnection at the *** results show that the magnetic Held and the How velocity components perpendicular to the reconnection plane can be generated in magnetopause current *** vortical How structures can also occur in the magnetospheric side *** results are responsible for non-ideal MHD properties of the plasma fluid,i.e.,ion FLR and Hall MHD effects.

关键词： reconnection effects. inertia

Mittag-Leffler stability analysis of multiple equilibrium points in impulsive fractional-order quaternion-valued neural networks

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Frontiers of Information Technology & Electronic Engineering 2020年第2期21卷 234-246页

作者： K.UDHAYAKUMAR R.RAKKIYAPPAN jin-de cao Xue-gang TAN Department of Mathematics Hhamthiar Universityf Coimbatore 641046India School of Mathematics Southeast UniversityNanjing 210096China School of Automation Southeast UniversityNanjing 210096China

In this study,we investigate the problem of multiple Mittag-Leffler stability analysis for fractional-order quaternion-valued neural networks(QVNNs)with *** the geometrical properties of activation functions and the Lipschitz condition,the existence of the equilibrium points is *** addition,the global Mittag-Leffler stability of multiple equilibrium points for the impulsive fractional-order QVNNs is investigated by employing the Lyapunov direct ***,simulation is performed to illustrate the effectiveness and validity of the main results obtained.

关键词： Mittag-Leffler stability Fractional-order Quaternion-valued neural networks Impulse

Acute left ventricular failure after transcatheter closure of a secundum atrial septal defect in a patient with hypertrophic cardiomyopathy

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Chinese Medical Journal 2011年第4期124卷 618-621页

作者： ZHANG cao-jin HUANG Yi-gao HUANG Xin-sheng Department of Cardiology Guangdong General Hospital & Guangdong Cardiovascular Institute Guangzhou Guangdong 510100 China

We report a case of acute left ventricular failure at one hour after transcatheter closure of a secundum atrial septal defect （ASD） in a 28-year-old man with hypertrophic cardiomyopathy. Afforded noninvasive mechanical ventilation and the administration of intravenous morphine and high doses of furosemide, the patient exhibited improvement of his clinical condition, redtion of pulmonary congestion at chest X-ray, and satisfactory blood gas analyses in twelve hours. Twentyfour hours later, the patient received oral administration of furosemide and metoprolol. After 7 days the patient was discharged in good clinical condition. At follow-up at 12 months, the patient had remained symptomatically improved from NYHA Class Ⅲ symptoms before the procedure to Class Ⅱ symptoms. There was no latent arrhythmia at the follow-up examination. Follow-up transthoracic echocardiography estimated an improvement of the left ventricular function. So,transcatheter closure of a secundum ASD in a patient with hypertrophic cardiomyopathy is feasible, and a thorough understanding of the hemodynamic condition of ASD and hypertrophic cardiomyopathy will reduce the complication of ASD closure.

关键词： acute left ventricular failure atrial septal defect hypertrophic cardiomyopathy

Strip line beam position monitor for HLS LINAC

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Nuclear Science and Techniques 2005年第5期16卷 257-259页

作者： LI Ji-Hao SUN Bao-Gen HE Duo-Hui LU Ping WANG Yong WANG Jun-Hua jin Kai cao Yong ZHENG Pu NSRL University of Science and Technology of China Heifei 230029

The parameters of beam transverse positions at HLS 200 MeV LINAC are very important to injection ef-ficiency. We have designed a new non-interceptive strip line beam position monitor (BPM) as a substitution for the original interceptive fluorescent target. This paper gives out the theoretical analysis and bench test result of the strip line BPM. The BPM has a characteristic impedance of (50±5)?, a reflection coefficient of less than –4 dB, a band-width of 400 MHz, a coupling coefficient of less than -15 dB, and a sensitivity of 1.16 dB/mm. Additionally, the strip line BPM has a good linearity.

关键词： HLS LINAC BPM 时域频域电极灵敏性直线性加速器

A 18-electron system containing the super-heavy element: theoretical studies of Sg@Au12

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A 18-electron system containing the super-heavy element: the...

Complex systems and networks with their applications

中国化学会第十二届全国量子化学会议

作者： Guo-jin cao Jun Li Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Tsinghua University

Although there have been a large number of experimental and theoretical studies on the M@Au12（M=Mo,W,***.）clusters1-6,the geometric and electronic structures of the Au12 cage with the super-heavy Sg element are still *** this paper,these properties of the Sg@Au12 cluster have been investigated with the DFT/PW91,DFT/PBE,MP2 and CCSD（T）*** the results from these calculations show that the lowest-energy isomer of the Sg@Au12 cluster has the icosahedral *** the Sg@Au12 cluster with the Ih symmetry,strong 6s-6d hybridizations exist in the interactions between Sg and Au12 *** estimations of the super-hevay metal encapsulation in the Au12 cage show that the Seaborgium complex presents the similar and strong stabilities as the M@Au12 cluster（M=Cr,Mo and W）.

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Frontiers of Information Technology & Electronic Engineering 2020年第2期21卷 195-198页

作者： jin-de cao Yang LIU Jian-quan LU Leszek RUTKOWSKI School of Mathematics Southeast UniversityNanjing 210096China College of Mathematics and Computer Science Zhejiang Normal UniversityJinhua 321004China Institute of Computational Intelligence Czestochowa University of TechnologyCzestochowa 42-200Poland Information Technology Institute University of Social SciencesLodz 90-113Poland

Complex systems and networks capture most of the features in existing systems and have gained considerable attention over the past several *** recent years,research has extended to the fields of networked control systems,cyber-physical systems,logical networks,neural networks,and related *** is mainly due to rapid developments in commu nication,computer,and information technologies,which enable the handling of large-scale data that cannot be easily handled via traditional methods.

关键词： networks network Complex

Arthroscopic M-shaped suture fixation for tibia avulsion fracture of posterior cruciate ligament:A modified technique and case series

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World Journal of Orthopedics 2024年第7期15卷 642-649页

作者： Xiao-Hui Zhang Jian Yu Meng-Yao Zhao jin-Hui cao Bing Wu Dan-Feng Xu Department of Orthopaedic Surgery Shaoxing Central HospitalShaoxing 312000Zhejiang ProvinceChina Department of Orthopaedic Surgery The Central Hospital of Shaoxing UniversityShaoxing 312000Zhejiang ProvinceChina Central Laboratory Shaoxing Central HospitalShaoxing 312000Zhejiang ProvinceChina

BACKGROUND Tibial avulsion fractures of the posterior cruciate ligament(PCL)are challenging to treat and compromise knee stability and *** open surgery often requires extensive soft tissue dissection,which may increase the risk of *** response to these concerns,arthroscopic techniques have been *** aim of this study was to introduce a modified arthroscopic tech-nique utilizing an M-shaped suture fixation method for the treatment of tibial avulsion fractures of the PCL and to evaluate its outcomes through a case *** To evaluate the effects of arthroscopic M-shaped suture fixation on treating tibia avulsion fractures of the *** We developed a modified arthroscopic M-shaped suture fixation technique for tibia avulsion fractures of the *** case series included 18 patients who underwent the procedure between January 2021 and December *** patients were assessed for range of motion(ROM),Lysholm score and International knee documentation committee(IKDC)*** complications were also *** The patients were followed for a mean of 13.83±2.33 *** patients showed radiographic *** the final follow-up,all patients had full ROM and a negative posterior drawer *** mean Lysholm score significantly improved from 45.28±8.92 preoperatively to 91.83±4.18 at the final follow-up(P<0.001),and the mean IKDC score improved from 41.98±6.06 preoperatively to 90.89±5.32 at the final follow-up(P<0.001).CONCLUSION The modified arthroscopic M-shaped suture fixation technique is a reliable and effective treatment for tibia avulsion fractures of the PCL,with excellent fracture healing and functional recovery.

关键词： Posterior cruciate ligament Avulsion fracture Arthroscopic Case series Suture fixation

Deformation fixation, mechanical properties and chemical analysis of compressed Populus cathayana wood pretreated by glycerin

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Forestry Studies in China 2010年第4期12卷 213-217页

作者： LI Yan cao jin-zhen jin Xiao-juan College of Materials Science and Engineering Beijing Forestry University Beijing 100083 P. R. China

In order to find an effective and environmentally friendly method to fix compressive deformation of wood, we determined or measured the recovery ratio, surface hardness, modulus of elasticity （MOE） and the modulus of rupture （MOR） of poplar （Populus cathayana Rehd.） samples pretreated by 40-60% glycerin solutions and then compressed at 160℃ for 10-120 min. We analyzed the data statistically by using two-factor analysis of variance. The chemical compositions of thermal treated wood were also analyzed and compared with untreated control samples. The results showed that the compressive deformation of wood can be properly fixed by glycerin pretreatment. The recovery ratio of compressed wood decreased with prolonging compression time and increasing concent-ration of the glycerin solution. However, the mechanical properties of compressed wood decreased after a long time of compression. The optimal fixation of compressive deformation is to pretreat the wood by a solution of 50% glycerin and compression at 160℃ for 60 min. The analysis of chemical composition showed that glycerin displayed an accelerating effect on degradation of hemicelluloses and lignin during heat-treatment, which explains the main reason of the effect of acceleration of glycerin on deformation fixation of compressed wood.

关键词： compressed wood glycerin recovery ratio mechanical properties chemical composition