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| 1 | A nitrogen and phosphorus dynamic model of mesocosm pelagic ecosystem in the Jiaozhou Bay in China显示文摘A nitrogen and phosphorus dynamic model of mesocosm pelagic ecosystem was established according to the summary and synthesis of the models available,in which seven state variables (DIN,PO4-P,DON,DOP,phytoplankton,zooplankton and detritus) were included. Logically it had five modules-phytoplankton,zooplankton,dissolved inorganic nutrients,dissolved organic nutrients and detritus. The results showed that this model could simulate the variations of DIN,PO4-P,DON,DOP,POC and phytoplankton biomass in pelagic ecosystem in mesocosm properly,based on the site experiment data in the Jiaozhou Bay in the autumn of 1999 and the summer of 2000. Not only the logical structure but also the model parameters were feasible,and about 20 parameters were made to fit for the Jiaozhou Bay during the simulation. All of these are necessary to study the control mechanism of nutrients biogeochemical cycling in the Jiaozhou Bay and other China's coastal waters. | LI Keqiang WANG Xiulin LIANG Shengkang SHI Xiaoyong ZHU Chenjian CHEN Hu | 2008 | Acta Oceanologica Sinica2008，27，5： | 4 |
| 2 | Effect of Curing Regime on the Distribution of Al^(3+) Coordination in Hardened Cement Pastes显示文摘The effect of curing regime on the distribution of Al3+coordination in hardened cement pastes within 28 d were investigated by29Si and27Al magic angle spinning(MAS) nuclear magnetic resonance(NMR) with deconvolution technique.The results indicate that the tetrahedral coordination Al3+incorporated in C-S-H structure mainly originate from the Al3+incorporated in the alite and belite phases in the Portland cement.The curing regime of constant temperature of 20 ℃ is beneficial to the octahedral coordination Al3+ transforming to tetrahedral coordination Al3+incorporated in C-S-H structure.However,at curing regime of variable temperature,the temperature rising process is more advantageous to the transformation from ettringite to monosulphate,substitution of Al3+for Si4+in the C-S-H structure and the formation of the third aluminate hydrate(TAH) than that at constant temperature of 20 ℃.The high temperature of 60 ℃ in the holding temperature process promotes the decomposition of ettringite,and enhances the consumption of the Al3+ incorporated in C-S-H phases and the Al3+in TAH for the monosulphate forming.The temperature decreasing promotes the transformation from monosulphate to ettringite,and increases the consumption of the Al3+ incorporated in C-S-H phases,and then increases the quantity of the TAH. | 丁庆军 HU Chenguang FENG Xiaoxin HUANG Xiulin | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，5： | 3 |
| 3 | Modelling Nitrogen and Phosphorus Dynamics in a Mesocosm Pelagic Ecosystem in Laizhou Bay in China显示文摘A model of nitrogen and phosphorus dynamics in mesocosm experiments was established on the basis of a summary and synthesis of the existing models. The established model comprised seven state variables(DIN,PO4-P,DON,DOP,phytoplankton,zooplankton and detritus) and five modules - phytoplankton,zooplankton,dissolved inorganic nutrients,dissolved organic nutrients and detritus. Comparison with the in situ experimental data in Laizhou Bay at the end of August 2002 showed that this model could properly simulate the variations of DIN,PO4-P,and phytoplankton biomass in a mesocosm pelagic ecosystem. It was found that not only the model structure but also the parameters adopted were fit for simulation. The sensitivity of the main state variables to the parameter change was assessed by sensitivity analysis. All these results are useful for studying the control mechanism of biogeochemical cycling of nutrients in Laizhou Bay and other Chinese coastal waters. | LI Keqiang WANG Xiulin HAN Xiurong SHI Xiaoyong CHEN Hu | 2009 | Journal of Ocean University of China2009，8，2： | 3 |
| 4 | EXISTENCE OF POSITIVE PERIODIC SOLUTIONS FOR INFINITE DELAY FUNCTIONAL DIFFERENTIAL EQUATIONS显示文摘In this paper, the existence of positive periodic solutions for infinite delay functional differential equations(FDEs for short) is discussed by utilizing a fixed point theorem on a cone in Banach space. Some results on the existence of positive periodic solutions are derived. | Hu Xiulin Zhou Zongfu (School of Math, and Computation Science, Anhui University, Hefei 230039) | 2006 | Annals of Differential Equations2006，22，3： | 2 |
| 5 | Evaluation intersys- tern interference between compass and Galileo显示文摘 | Hang R Y Liu Yuqi Hu Xiulin | 2011 | Journal of Convergence Information Technology2011，6，6： | 1 |
| 6 | Effect of Curing Regime on Polymerization of C-S-H in Hardened Cement Pastes显示文摘The effect of two different curing regimes on the polymerization degree of C-S-H in hardened cement pastes within 28 d were investigated by measuring the chemical environments of 29Si with magic angle spinning (MAS) nuclear magnetic resonance (NMR) and by analyzing the 29Si NMR spectra with deconvolution technique. The experimental results indicate that, at curing regime of constant temperature of 20 ℃, the polymerization of C-S-H increases and then decreases with curing age, and the Al/Si ratio increases gradually with curing age, furthermore, the two non-bridging oxygen bonds of bridging silicate tetrahedra in C-S-H structure mainly bond to H+. At curing regime of variable temperature, the polymerization of C-S-H firstly increases then changes slightly and subsequently decreases with the temperature from low to high and then to low, and the Al/Si ratio firstly increases then keeps invariant and subsequently slightly decreases. Moreover, the temperature decreasing is advantageous for the Ca2+ to be bonded to the bridging silicate tetrahedra and entering into the interlayer of C-S-H structure. The polymerization of C-S-H at curing regime of variable temperature is higher than that cured at constant temperature, but the curing regime of constant temperature is more beneficial to the substitution of Al3 for Si4+ than that of variable temperature. | 丁庆军 HU Chenguang FENG Xiaoxin HUANG Xiulin | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，4： | 1 |
| 7 | Thermal Con- ductivity and Thermal Rectification in Graphene Nanorib- bons: a Molecular Dynamics Study 显示文摘 | HU Jiuning RUAN Xiulin CHEN Yong P | 2009 | Nano Letters2009，9，： | 1 |
| 8 | Oxygen defect-rich double-layer hierarchical porous Co3O4 arrays as high-efficient oxygen evolution catalyst for overall water splitting显示文摘Construction of oxygen evolution electrocatalysts with abundant oxygen defects and large specific surface areas can significantly improve the conversion efficiency of overall water splitting.Herein,we adopt a controlled method to prepare oxygen defect-rich double-layer hierarchical porous Co3O4 arrays on nickel foam(DL-Co3O4/NF)for water splitting.The unique array-like structure,crystallinity,porosity,and chemical states have been carefully investigated through SEM,TEM,XRD,BET,and XPS techniques.The designated DL-Co3O4/NF has oxygen defects of up to 67.7%and a large BET surface area(57.4 m2g-1).Electrochemical studies show that the catalyst only requires an overpotential of 256 mV to reach 20 mA cm-2,as well as a small Tafel slope of 60.8 mV dec-1,which is far better than all control catalysts.Besides,the catalyst also demonstrates excellent overall water splitting performance in a two-electrode system and good long-term stability,far superior to most previously reported catalysts.Electrocatalytic mechanisms indicate that abundant oxygen vacancies provide more active sites and good conductivity.At the same time,the unique porous arrays facilitate electrolyte transport and gas emissions,thereby synergistically improving OER catalytic performance. | Puxuan Yan Meilin Huang Benzhi Wang Zixia Wan Mancai Qian Hu Yan Tayirjan Taylor Isimjan Jianniao Tian Xiulin Yang | 2020 | Journal of Energy Chemistry2020，29，8： | 1 |
| 9 | Influence of the Chemical Structure of Dithiocarbamates with Different R Groups on the Reversible Addition-Fragmentation Chain Transfer Polymerization显示文摘 | Di Zhou Xiulin Zhu Ban Zhu Lihua Hu Zhenping Cheng | 2007 | Applied Polymer Science2007，103，2： | 1 |
| 10 | Effects of the phytoplanktivorous silver carp ( Hypophthalmichthys molitrixon ) on plankton and the hepatotoxic microcystins in an enclosure experiment in a eutrophic lake, Lake Shichahai in Beijing显示文摘 | Xia Zhang Ping Xie Le Hao Nichun Guo Yingan Gong Xiulin Hu Jun Chen Gaodao Liang | 2006 | Aquaculture2006，，1： | 1 |
| 11 | Speech distortion measure based on auditory properties显示文摘The Perceptual Spectrum Distortion (PSD), based on auditory properties of human being, is presented to measure speech distortion. The PSD measure calculates the speech distortion distance by simulating the auditory properties of human being and converting short-time speech power spectrum to auditory perceptual spectrum. Preliminary simulative experiments in comparison with the Itakura measure have been done. The results show that the PSD measure is a perferable speech distortion measure and more consistent with subjective assessment of speech quality. | CHEN Guo HU Xiulin ZHANG Yunyu ZHU Yaoting (Department of Electronics and Information Engineering, Huazhong University of Science and Technology Wuhan 430074) | 2000 | Chinese Journal of Acoustics2000，19，4： | 0 |
| 12 | Multiple Excitation Wavelength Fluorescence Emission Spectra Technique for Discrimination of Phytoplankton显示文摘In vivo fluorescence methods are efficient tools for studying the distribution of phytoplankton in nature.Different algae species usually have different pigments with different ratios,which results in different fluorescence emission spectra.Based on multiple excitation wavelength fluorescence emission spectra,a discrimination technique is established in this study.The discrimination method,established by multivariate linear regression and weighted least-squares,was used to differentiate the samples cultured in the laboratory and collected from Jiaozhou Bay near Qingdao at the division level.The correctly discriminated samples were ≥ 86% for single algae samples,≥ 88% for simulatively mixed ones,≥ 91% for physically mixed ones and 100% for samples collected from Jiaozhou Bay.The result in this research is more definite for the physically mixed samples in the laboratory.The method described here can be employed to monitor the phytoplankton population in the marine environment. | HU Xupeng SU Rongguo ZHANG Fang WANG Xiulin WANG Hongtao ZHENG Zhixi | 2010 | Journal of Ocean University of China2010，9，1： | 0 |
| 13 | Interface engineering of porous Fe^(2)P-WO_(2.92) catalyst with oxygen vacancies for highly active and stable large-current oxygen evolution and overall water splitting显示文摘Constructing a low cost,and high-efficiency oxygen evolution reaction(OER)electrocatalyst is of great significance for improving the performance of alkaline electrolyzer,which is still suffering from highenergy consumption.Herein,we created a porous iron phosphide and tungsten oxide self-supporting electrocatalyst with oxygen-containing vacancies on foam nickel(Fe_(2)P-WO_(2.92)/NF)through a facile insitu growth,etching and phosphating strategies.The sequence-controllable strategy will not only generate oxygen vacancies and improve the charge transfer between Fe_(2)P and WO_(2.92) components,but also improve the catalyst porosity and expose more active sites.Electrochemical studies illustrate that the Fe_(2)P-WO_(2.92)/NF catalyst presents good OER activity with a low overpotential of 267 mV at 100 mA cm^(-2),a small Tafel slope of 46.3 mV dec^(-1),high electrical conductivity,and reliable stability at high current density(100 mA cm^(-2) for over 60 h in 1.0 M KOH solution).Most significantly,the operating cell voltage of Fe_(2)P-WO_(2.92)/NF‖Pt/C is as low as 1.90 V at 400 mA cm^(-2) in alkaline condition,which is one of the lowest reported in the literature.The electrocatalytic mechanism shows that the oxygen vacancies and the synergy between Fe_(2)P and WO_(2.92) can adjust the electronic structure and provide more reaction sites,thereby synergistically increasing OER activity.This work provides a feasible strategy to fabricate high-efficiency and stable non-noble metal OER electrocatalysts on the engineering interface. | Qimin Peng Qiuting He Yan Hu Tayirjan Taylor Isimjan Ruobing Hou Xiulin Yang | 2022 | Journal of Energy Chemistry2022，31，2： | 0 |
| 14 | Electronically modulated d-band centers of MOF-derived carbon-supported Ru/HfO_(2) for oxygen reduction and aqueous/flexible zinc-air batteries显示文摘The construction of oxide/metal composite catalysts is a competent means of exploiting the electronic interactions between oxide/metal to enhance catalytic activity.In this work,we construct a novel heterogeneous composite(Ru/HfO_(2)-NC)with Ru/HfO2nanoparticles nested in nitrogen-doped porous carbon via a zeolitic imidazole frameworks-assisted(ZIF)co-precipitation and calcination approach.In particular,ZIF guides an in-situ construction of nested configuration and confines the scattered nanoparticles.Strikingly,Ru/HfO_(2)-NC exhibits unusual ORR activity,superb durability,and methanol tolerance in0.1 M KOH solution with high half-wave potential(E1/2)of 0.83 V and follows a near-4e-reaction pathway.Additionally,the ZAB assembled with cathodic Ru/HfO_(2)-NC outputs a power density of 157.3 m W cm^(-2),a specific capacity of 775 mA h g-1Zn,and a prolonged lifespan of 258 h at 5 mA cm^(-2).Meanwhile,the catalyst has demonstrated potential applicability in flexible ZAB.As suggested by experimental results and density functional theory(DFT)analysis,the remarkable property possibly originated from the optimization of the adsorption and desorption of reactive intermediates caused by the reconfiguration of the electronic structure between Ru and HfO_(2). | Chuan Hu Fengli Wei Qinrui Liang Qiming Peng Yuting Yang Tayirjan Taylor Isimjan Xiulin Yang | 2023 | Journal of Energy Chemistry2023，，5： | 0 |
| 15 | Controlling factors for oil production in continental shales:A case study of Cretaceous Qingshankou Formation in Songliao Basin显示文摘Continental shale oil is widely distributed in the Cretaceous Qingshankou Formation of the Songliao Basin in Northeast China.In the Qijia-Gulong sag and the Changling sag in the Songliao Basin,breakthroughs of shale oil exploration and development have been made in the first and second members of the Qingshankou Formation,and several wells represented byWell GYYP1 have achieved high and stable shale oil production.However,some horizontal wells in shale oil development pilot test(Well groups A and D)were characterized by low shale oil production,high flowback rate and rapid production decline.Therefore,controlling factors of the shale oil production were investigated.The results show that shale oil enrichment area and optimal sweet spots are fundamental for high shale oil production,improving horizontal length and drilling ratio of sweet spots is a technical guarantee for enhancing shale oil production of single well,and artificial fracture network(incl.scale,complexity,and coupling with preexisting geological bodies)created by fracturing is a direct factor for controlling the shale oil production.For subsequent exploration and development of the shale oil,the heterogeneity of sweet spot distribution should be carefully considered,the shale oil enrichment areas and optimal sweet spots also need be optimized,and the wellbore trajectory control and fine geological modeling techniques should be figured out.Moreover,the fracturing techniques suitable for the shale with high clay mineral content and weak brittleness should be developed,and the personalized and differentiated staged fracturing also needs to be performed,to effectively enhance single-well shale oil production and estimated ultimate recovery. | Bo Zhou Yuxiang Xiao Zhengdong Lei Rui Wang Shuiqing Hu Xiulin Hou | 2023 | Petroleum Research2023，8，2： | 0 |
| 16 | PERIODIC SOLUTIONS TO A HIGH-ORDER NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATION显示文摘In this paper,using the principle of a priori boundedness,we study the existence and uniqueness of periodic solutions to a high-order neutral functional differential equation.Some new results for the existence and uniqueness of the periodic solution are obtained. | Xiulin Hu (Dept.of Math.and Physics,Hefei University,Hefei 230601) Zongfu Zhou (School of Math.Science,Anhui University,Hefei 230039) | 2012 | Annals of Differential Equations2012，28，1： | 0 |
| 17 | Static output feedback stabilization for second-order singular systems using model reduction methods显示文摘In this paper,the static output feedback stabilization for large-scale unstable second-order singular systems is investigated.First,the upper bound of all unstable eigenvalues of second-order singular systems is derived.Then,by using the argument principle,a computable stability criterion is proposed to check the stability of secondorder singular systems.Furthermore,by applying model reduction methods to original systems,a static output feedback design algorithm for stabilizing second-order singular systems is presented.A simulation example is provided to illustrate the effectiveness of the design algorithm. | Zheng WANG Yuhao CONG Xiulin HU | 2021 | Applied Mathematics and Mechanics(English Edition)2021，42，3： | 0 |
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