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| 1 | Electrochemical Properties of Electrodes with Different Shapes and Diffusion Kinetic Analysis of Microbial Fuel Cells on Ocean Floor显示文摘Microbial fuel cell(MFC) on the ocean floor is a kind of novel energy-harvesting device that can be developed to drive small instruments to work continuously.The shape of electrode has a great effect on the performance of the MFC.In this paper,several shapes of electrode and cell structure were designed,and their performance in MFC were compared in pairs:Mesh(cell-1) vs.flat plate(cell-2),branch(cell-3) vs.cylinder(cell-4),and forest(cell-5) vs.disk(cell-6) FC.Our results showed that the maximum power densities were 16.50,14.20,19.30,15.00,14.64,and 9.95 mWm-2 for cell-1,2,3,4,5 and 6 respectively.And the corre-sponding diffusion-limited currents were 7.16,2.80,18.86,10.50,18.00,and 6.900 mA.The mesh and branch anodes showed higher power densities and much higher diffusion-limited currents than the flat plate and the cylinder anodes respectively due to the low diffusion hindrance with the former anodes.The forest cathode improved by 47% of the power density and by 161% of diffusion-limited current than the disk cathode due to the former's extended solid/liquid/gas three-phase boundary.These results indicated that the shape of electrode is a major parameter that determining the diffusion-limited current of an MFC,and the differences in the elec-trode shape lead to the differences in cell performance.These results would be useful for MFC structure design in practical applica-tions. | FU Yubin LIU Jia SU Jia ZHAO Zhongkai LIU Yang XU Qian | 2012 | Journal of Ocean University of China2012，11，1： | 3 |
| 2 | Distribution Features of the Nanhua-Sinian Rifts and their Significance to Hydrocarbon Accumulation in the Tarim Basin显示文摘On the basis of reprocessing 34 new two-dimensional spliced long sections(20,191 km) in the Tarim Basin, the deep structure features of the Tarim Basin were analyzed through interpreting 30,451 km of two-dimensional seismic data and compiling basic maps. Seismic interpretation and geological analysis conclude that the Nanhua-Sinian strata are a set of rift-depression depositional systems according to their tectonic and depositional features. The rift valley formed in the Nanhua Period, and the transformation became weaker during the late Sinian Period, which eventually turned into depression. From bottom to top, the deposited strata include mafic igneous, tillite, mudstone, and dolomite. Three major depocenters developed inside this basin during the rift stage and are distributed in the eastern Tarim Basin, the Awati area, and the southwestern Tarim Basin. Among them, the rift in the eastern Tarim Basin strikes in the near east-west direction on the plane and coincides with the aeromagnetic anomaly belt. This represents a strong magnetic zone formed by upwelling basic volcanic rock along high, steep normal faults of the Nanhua Period. Controlled by the tectonic background, two types of sedimentary systems were developed in the rift stage and depression stage, showing two types of sequence features in the Sinian depositional stage. The Nanhua System appears as a wedge-shaped formation, with its bottom in unconformable contact with the base. The rifting event has a strong influence on the current tectonic units in the Tarim Basin, and affects the distribution of source rock in the Yuertus Formation and reservoir beds in the Xiaoerbulake Formation in Lower Cambrian, as well as the gypseous cap rock in Middle Cambrian. The distribution features of the rifts have important and realistic significance for determining the direction of oil and gas exploration in the deep strata of the Tarim Basin. Comprehensive analysis suggests that the Tazhong region is the most favorable zone, and the Kalpin-Bachu region is the optimal potential zone for exploring sub-salt oil and gas in deep Cambrian strata. | BAI Zhongkai CHENG Minghua CHEN Cheng HUO Junzhou ZHANG Junfeng ZHOU Xingui GAO Yongjin ZHAO Bo QIU Haijun HAN Miao YANG Youxing SUN Zhichao MIAO Miaoqing ZHANG Jinhu LI Qingyao | 2020 | Acta Geologica Sinica(English Edition)2020，94，2： | 3 |
| 3 | An Iterative Learning Approach to Identify Fractional Order KiBaM Model显示文摘This paper discusses the parameter and differentiation order identification of continuous fractional order Ki Ba M models in ARX(autoregressive model with exogenous inputs)and OE(output error model) forms. The least squares method is applied to the identification of nonlinear and linear parameters,in which the Grunwald-Letnikov definition and short memory principle are applied to compute the fractional order derivatives.An adaptive P-type order learning law is proposed to estimate the differentiation order iteratively and accurately. Particularly,a unique estimation result and a fast convergence speed can be arrived by using the small gain strategy, which is unidirectional and has certain advantages than some state-of-art methods. The proposed strategy can be successfully applied to the nonlinear systems with quasi-linear characteristics. The numerical simulations are shown to validate the concepts. | Yang Zhao Yan Li Fengyu Zhou Zhongkai Zhou YangQuan Chen | 2017 | IEEE/CAA Journal of Automatica Sinica2017，4，2： | 2 |
| 4 | AN EMPIRICAL STUDY ON USER ACCESS TO ENTERTAINMENT STREAMING MEDIA显示文摘Due to large size and different popularity for different part of the video, most proxy caches for streaming medias cache only a part of the video. Thus, an accurate understanding on the internal popularity distribution of media objects in streaming applications is very important for the development of efficient cache mechanisms. This letter shows that the internal popularity of popular streaming media obeys a k-transformed Zipf-like distribution through analyzing two 6-month long traces recorded at different streaming video servers of an entertainment video-on-demand provider. This empirical model can be used to design an efficient cach- ing algorithm. | Yu Jiang Chou Chun Tung Yang Zhongkai Du Xu Wang Tai | 2006 | Journal of Electronics(China)2006，23，5： | 2 |
| 5 | Silicon photonic transceivers for application in data centers显示文摘Global data traffic is growing rapidly,and the demand for optoelectronic transceivers applied in data centers(DCs)is also increasing correspondingly.In this review,we first briefly introduce the development of optoelectronics transceivers in DCs,as well as the advantages of silicon photonic chips fabricated by complementary metal oxide semiconductor process.We also summarize the research on the main components in silicon photonic transceivers.In particular,quantum dot lasers have shown great potential as light sources for silicon photonic integration—whether to adopt bonding method or monolithic integration—thanks to their unique advantages over the conventional quantum-well counterparts.Some of the solutions for highspeed optical interconnection in DCs are then discussed.Among them,wavelength division multiplexing and four-level pulseamplitude modulation have been widely studied and applied.At present,the application of coherent optical communication technology has moved from the backbone network,to the metro network,and then to DCs. | Haomiao Wang Hongyu Chai Zunren Lv Zhongkai Zhang Lei Meng Xiaoguang Yang Tao Yang | 2020 | Journal of Semiconductors2020，41，10： | 1 |
| 6 | Functional analysis of the promoter of the dmrt1 gene in Chinese tongue sole,Cynoglossus semilaevis显示文摘The dmrt1 (doublesex and mab-3 related transcription factor 1) gene is considered to play an essential role in testis differentiation and development among metazoan species. As an economically important marine fish in China, Chinese tongue sole (Cynoglossus semilaevis) possess a ZW/ZZ sex-determining system, and the females usually grow two to four times bigger than males. Previous studies have confirmed that Z-linked dmrt1 gene is the male determining gene in C. semilaevis and TALENs-mediated knocking-out individuals showed increased growth phenotype. In order to investigate the function of dmrt1 regulatory regions and its potential application, we have cloned the promoter of C. semilaevis dmrt1. The acquired sequence consisted of a 5'-upstream sequence and a partial exon1;functional analysis showed that there were two positive regulatory regions in the promoter, as well as one negative region and one neutral region. These positive regions were then combined to obtain several newly constructed promoters. Both in vitro and in vivo analysis confirmed one of them (dmrt1-Δ3+Δ4) showed elevated promoting activity compared to the full-length promoter and could drive exogenous gene expression in tongue sole gonads. Our results will provide useful information for understanding the regulatory mechanism of dmrt1 gene during C. semilaevis sex determination, and the endogenous promoter will facilitate the transgenic research for analyzing sex- and growth-related genes. | WANG Qian CUI Zhongkai GUO Hua ZHANG Nianwei XU Wenteng YANG Yingming CHEN Songlin | 2019 | Journal of Oceanology and Limnology2019，37，4： | 1 |
| 7 | A New Wavelet-based image denoising using undecimated discrete wavelet transform and least squares support vector machine 显示文摘 | Wang Xiangyang Yang Hongying Fu Zhongkai | 2010 | Pergamon Press2010，37，10： | 1 |
| 8 | Serological Targeted Analysis of an ITIH4 Peptide Isoform: A Preterm Birth Biomarker and Its Associated SNP Implications显示文摘Over 11% of all pregnancies in the US result in preterm birth,greatly contributing to perinatal morbidity and mortality(Goldenberg and Rouse,1998).Preterm birth etiologies remain largely unknown,and effective prevention methods have yet to be developed.The use of biofluid(e.g.,serum or urine)for the analysis of the naturally occurring | Zhou Tan Zhongkai Hu Emily Y.Cai Cantas Alev Ting Yang Zhen Li Joyce Sung Yasser Yehia El-Sayed Gary M.Shaw David K.Stevenson Atul J.Butte Guojun Sheng Karl G.Sylvester Harvey J.Cohen Xuefeng B.Ling | 2015 | Journal of Genetics and Genomics2015，42，9： | 1 |
| 9 | Visualization of the electronic phase separation in superconducting K_(x)Fe_(2−y)Se_(2)显示文摘Type-II iron-based superconductors(Fe-SCs),the alkali-metal-intercalated iron selenide A_(x)Fe_(2−y)Se_(2)(A=K,Tl,Rb,etc.)with a superconducting transition temperature of 32 K,exhibit unique properties such as high Néel temperature,Fe-vacancies ordering,antiferromagnetically ordered insulating state in the phase diagram,and mesoscopic phase separation in the superconducting materials.In particular,the electronic and structural phase separation in these systems has attracted intensive attention since it provides a platform to unveil the insulating parent phase of type-II Fe-SCs that mimics the Mott parent phase in cuprates.In this work,we use spatial-and angle-resolved photoemission spectroscopy to study the electronic structure of superconducting K_(x)Fe_(2−y)Se_(2).We observe clear electronic phase separation of K_(x)Fe_(2−y)Se_(2) into metallic islands and insulating matrix,showing different K and Fe concentrations.While the metallic islands show strongly dispersive bands near the Fermi level,the insulating phase shows an energy gap up to 700 meV and a nearly flat band around 700 meV below the Fermi energy,consistent with previous experimental and theoretical results on the superconducting K_(1−x)Fe_(2)Se_(2)(122 phase)and Fe-vacancy ordered K_(0.8)Fe_(1.6)Se_(2)(245 phase),respectively.Our results not only provide important insights into the mysterious composition of phase-separated superconducting and insulating phases of K_(x)Fe_(2−y)Se_(2),but also present their intrinsic electronic structures,which will shed light on the comprehension of the unique physics in type-II Fe-SCs. | Yujie Chen Juan Jiang Haifeng Yang Pavel Dudin Alexey Barinov Zhongkai Liu Haihu Wen Lexian Yang Yulin Chen | 2021 | Nano Research2021，14，3： | 1 |
| 10 | Study on dry spinning and structure of low mole ratio complex of calcium chloride-polyamide 6 显示文摘 | Yang Zhongkai Yin Huihui Li Xiaoning | 2010 | J Appl Polym Sci2010，118，4： | 1 |
| 11 | China’s hydropower energy system toward carbon neutrality显示文摘Wind and solar powers will gradually become dominant energies toward carbon neutrality.Large-scale renewable energies,with strong stochasticity,high volatility,and unadjustable features,have great impacts on the safe operation of power system.Thus,an advanced hydropower energy system serving multiple energies is required to respond to volatility,with expanding role from a“stable energy supplier”to a“flexible efficiency regulator”.Future research and application can be considered from three aspects:1)system expansion(e.g.,the construction of large-scale hydropower/renewable energy bases in China,the construction of transnational hydropower energy internet,and the functional transformation of traditional hydropower reservoirs and generating units);2)efficiency promotion(e.g.,advanced intelligent forecasting,multi-objective operation,and risk management methods);and 3)supporting measures(e.g.,market reform,benefit compensation and policy mechanism,technical standards,and laws and regulations). | Zhongkai FENG Wenjing NIU Chuntian CHENG Jianzhong ZHOU Tao YANG | 2022 | Frontiers of Engineering Management2022，9，4： | 1 |
| 12 | A new wavelet-based image denoising using undecimated discrete wavelet transform and least squares support vector machine 显示文摘 | WANG Xiangyang YANG Hongying FU Zhongkai | 2010 | Expert Systems with Applications2010，37，10： | 1 |
| 13 | ARPES investigation of the electronic structure and its evolution in magnetic topological insulator MnBi_(2+2n)Te_(4+3n)family显示文摘In the past 5 years,there has been significant research interest in the intrinsic magnetic topological insulator family compounds MnBi_(2+2n)Te_(4+3n)n(where n=0,1,2…).In particular,exfoliated thin films of MnBi_(2)Te_(4)have led to numerous experimental breakthroughs,such as the quantum anomalous Hall effect,axion insulator phase and high-Chern number quantum Hall effect without Landau levels.However,despite extensive efforts,the energy gap of the topological surface states due to exchange magnetic coupling,which is a key feature of the characteristic band structure of the system,remains experimentally elusive.The electronic structure measured by using angle-resolved photoemission(ARPES)shows significant deviation from ab initio prediction and scanning tunneling spectroscopy measurements,making it challenging to understand the transport results based on the electronic structure.This paper reviews the measurements of the band structure of MnBi_(2+2n)Te_(4+3n)n magnetic topological insulators using ARPES,focusing on the evolution of their electronic structures with temperature,surface and bulk doping and film thickness.The aim of the review is to construct a unified picture of the electronic structure of MnBi_(2+2n)Te_(4+3n)n compounds and explore possible control of their topological properties. | Runzhe Xu Lixuan Xu Zhongkai Liu Lexian Yang Yulin Chen | 2024 | National Science Review2024，11，2： | 0 |
| 14 | Molecular Cloning, Expression Pattern, and 3D Structural Prediction of the Cold Inducible RNA- Binding Protein(CIRP) in Japanese Flounder(Paralichthys olivaceus)显示文摘Cold-inducible RNA-binding protein(CIRP) is a kind of RNA binding proteins that plays important roles in many physiological processes. The CIRP has been widely studied in mammals and amphibians since it was first cloned from mammals. On the contrary, there are little reports in teleosts. In this study, the Po CIRP gene of the Japanese flounder was cloned and sequenced. The genomic sequence consists of seven exons and six introns. The putative Po CIRP protein of flounder was 198 amino acid residues long containing the RNA recognition motif(RRM). Phylogenetic analysis showed that the flounder Po CIRP is highly conserved with other teleost CIRPs. The 5' flanking sequence was cloned by genome walking and many transcription factor binding sites were identified. There is a Cp Gs region located in promoter and exon I region and the methylation state is low. Quantitative real-time PCR analysis uncovered that Po CIRP gene was widely expressed in adult tissues with the highest expression level in the ovary. The m RNA of the Po CIRP was maternally deposited and the expression level of the gene was regulated up during the gastrula and neurula stages. In order to gain the information how the protein interacts with m RNA, we performed the modeling of the 3D structure of the flounder Po CIRP. The results showed a cleft existing the surface of the molecular. Taken together, the results indicate that the CIRP is a multifunctional molecular in teleosts and the findings about the structure provide valuable information for understanding the basis of this protein's function. | YANG Xiao GAO Jinning MA Liman LI Zan WANG Wenji WANG Zhongkai YU Haiyang QI Jie WANG Xubo WANG Zhigang ZHANG Quanqi | 2015 | Journal of Ocean University of China2015，14，1： | 0 |
| 15 | Endocarditis caused by Arcanobacteriumpyogenes显示文摘A21-year-old male farmer was admitted to our hospital on December 28,2011 with intermittent fever and chills of three months duration.Two weeks previously he had developed chest congestion and shortness of breath.His medical history was unremarkable.On physical examination,his temperature was 37.5℃,pulse 115/ min,and respiratory rate 20/min.His blood pressure was 118/49 mmHg.Cardiac auscultation revealed the presence of a systolic ejection murmur at the left sternal border and diastolic murmur at the right sternal border.A transthoracic echocardiogram performed on December 28 revealed left ventricular hypertrophy,an 8 mm ventricular septum,mild aortic valve stenosis,moderate to severe aortic insufficiency,moderate mitral valve insufficiency,vegetation on the aortic valve (measuring 5 mm×5 mm),and trace pericardial effusion.The remaining physical examination was unremarkable.The laboratory test results for this patient are shown in the Table 1. | Zhang Hui Shi Zhongkai Yang Qiwen Chen Yu Xu Yingchun | 2014 | Chinese Medical Journal2014，，19： | 0 |
| 16 | Long cycle performance of NC@VN/MnO cathode for AZIBs based on Mn/V relay type collaboration显示文摘Aqueous zinc ion batteries(AZIBs) have received great attention because of their non-toxicity,high safety,low cost,high abundance,and high specific power.However,their specific capacity is still low compared with lithium ion battery,and current academic research interesting has been focused on developing new cathode materials with high specific capacity.In this study,a Mn/V hybrid polymer framework is designed by a simple self-polymerization scheme.During subsequent calcination,ultrafine VN quantum dots and MnO nanoparticles are generated in situ and stably encapsulated inside N-doped carbon(NC) shells to obtain a novel hybrid cathode NC@VN/MnO for AZIBs.According to the density functional theory(DFT) calculation,the hybrids of MnO and VN can generate both interfacial effects and built-in electric fields that significantly accelerate ion and electron transport by tuning the intrinsic electronic structure,thus enhancing electrochemical performance.A synergistic strategy of composition and structural design allows the rechargeable AZIBs to achieve low-cost and excellent long-cycle performance based on a relay type collaboration at different cycling stages.Consequently,the NC@VN/MnO cathode has output a capacity of 108.3 mA h g^(-1)after 12,000 cycles at 10 A g^(-1).These results clearly and fully demonstrate the advantages of the hybrid cathode NC@VN/MnO. | Tingting Li Ruisong Guo Yang Li Leichao Meng Xiaohong Sun Fuyun Li Xinqi Zhao Zhongkai Xu Jianhong Peng Lingyun An | 2023 | Journal of Energy Chemistry2023，，8： | 0 |
| 17 | Application Prospect of 3D Printing Technology in Refractory Precast Components显示文摘3D printing is a rapid prototyping technology to shape materials or objects through printing layer by layer driven by digital models, which can be adopted for the manufacture of refractory precast components. Thus, the production technology of refractory precast components as well as the technique and advantages of 3D printing was introduced. The feasibility and application prospect of 3D printing concrete, contour crafting and adhesive 3D printing in refractory precast components were presented. | MAO Limin HU Chenxi YANG Haiyun LIU Jiwang HE Zehong QING Xiaobin CAI Zhongkai | 2019 | China's Refractories2019，28，2： | 0 |
| 18 | Detection and Comparison of Pathogen of Virus Disease in Pumpkin by RT-PCR and IC-PCR显示文摘Two kinds of methods RT-PCR and IC-PCR were used to detect pathogen of virus disease of pumpkin and the sensitivity of the two methods was compared. The results showed that PRSV-W and CMV were detected in diseased samples gathered in Yunnan Province, while WMV and CMV were detected in diseased samples gathered in Heilongjiang Province. The sensitivity of RT-PCR is higher than that of IC-PCR, but the effect of IC-PCR in the specialization of bonding reaction and requisition for experiment material is better than that of RT-PCR. | YANG Guohui ZHANG Zhongkai CUI Chongshi | 2006 | Journal of Northeast Agricultural University(English Edition)2006，13，2： | 0 |
| 19 | THE EXISTENCE OF PERIODIC SOLUTIONS TO SECOND ORDER SELF-ADJOINT DIFFERENCE EQUATIONS显示文摘In this paper, we consider the existence of periodic solutions to a class of second order self-adjoint difference equations. By the least action principle and saddle point theorem in the critical point theory, some new results are obtained. As an application, we also give two examples to demonstrate our main results. | Tieshan He, Fengjian Yang, Youfa Lei (Dept. of Computation Science, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, ) | 2010 | Annals of Differential Equations2010，26，2： | 0 |
| 20 | A Class of Multiderivative Hybrid One-step Methods显示文摘This paper presents a class of hybrid one-step methods that are obtained by using Cramer’s rule and rational approximations to function exp(q). The algorithms fall into the catalogue of implicit formula, which involves sth order derivative and s+1 free parameters. The order of the algorithms satisfies s+1≤p≤2s+2. The stability of the methods is also studied, necessary and sufficient conditions for A-stability and L-stability are given. In addition, some examples are also given to demonstrate the method presented. | Feng-jian Yang, Xin-ming Chen, Ai-guo ZhangDepartment of Mathematics, Zhongkai Agrotechnical College, Guangzhou 510225, ChinaDepartment of Mathematics and Physics, Wuyi University, Jiangmen 529020, ChinaDepartment of Basics, Zhongshan College, Zhongshan 528403, China | 2002 | Acta Mathematicae Applicatae Sinica2002，18，3： | 0 |
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