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An Improved Approach for Interaction of Wave with Floating Spheres and Its Applications

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China Ocean Engineering 2023年第1期37卷 115-130页

作者： LIU Can dong Zhi-yong PAN Yun TONG huan-huan YANG li-jing College of Civil Engineering Zhejiang University of TechnologyHangzhou 310023China School of Naval Architecture and Maritime Zhejiang Ocean UniversityZhoushan 316022China School of Marine Engineering Equipments Zhejiang Ocean UniversityZhoushan 316022China

To develop and utilize marine resources in the deep sea, the higher requirements for floating structures, which are operated in marine environment for a long term, have been put forward. Reasonable structure type and accurate force analysis are favorable guarantees to improve the survival performance and working performance of the floating structures. Floating spheres fastened by mooring cable were widely used in floating structures. In this paper, the wave forces of the floating sphere are efficiently and accurately calculated by solving the geometric relationship between the non-submerged floating sphere and wave surface. Combined with the hydrodynamic calculation of mooring cables based on the lumped mass method, the coupled motion model of multi-floating spheres fastened by multi-mooring cable was established under wave action. Furthermore, according to the floating structures fastened by mooring cable in the actual ocean engineering, the topological method of multi-mooring cables fastening the multifloating spheres was expounded from simple to complex. Finally, the modeling method and preliminarily hydrodynamic characteristics of the fastened floating structures, including the mooring system of renewable energy devices, ocean buoy, and coral nursery, were presented and analyzed in detail. The obtained results showed that the method for calculating the wave force on the floating sphere developed in this paper can accurately describe the motion process of the floating mooring sphere and the force on the mooring cable. Also, the topological method of multiple buoys and multiple mooring cables could efficiently establish various numerical hydrodynamic models of fastened buoys in ocean engineering.

关键词： floating sphere mooring cable wave forces hydrodynamic model ocean engineering

Effect of parenteral and early intrajejunal nutrition on pancreatic digestive enzyme synthesis, storage and discharge in dog models of acute pancreatitis

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World Journal of Gastroenterology 2007年第7期13卷 1123-1128页

作者： huan-Long Qin Zhen-dong Su Lei-Guang Hu Zai-Xian Ding Qing-Tian lin Institute of Parenteral Nutrition and EnteralNutrition Department of Surgery Shanghai Jiaotong UniversityAffiliated Sixth People's Hospital Yishan Rd. 600 Shanghai200233 China

AIM： To study the effect of early intrajejunal nutrition on enzyme-protein synthesis and secretion during acute pancreatitis. METHODS： Fifteen dogs were randomly divided into parenteral nutrition （n = 7） and early intrajejunal nutrition groups （n = 8）. An acute pancreatitis model was induced by injecting 5% sodium taurocholate and trypsin into the pancreas via the pancreatic duct. Intrajejunal nutrition was delivered with a catheter via a jejunostomy tube after the model was established for 24 h. On d 1 and 7 and at the beginning of nutritional support, radioactive tracing and electron microscopes were used to evaluate the enzyme-protein synthesis in acinar cells, the subcellular fractionation and the change in zymogen granules after 1.85 × 10^6 Bq L-3H phenylalanine was infused at 30, 60, 120, and 180 min. RESULTS： The 3H radioactivity in pancreatic acinar cells reached its peak level at 60 min, and the contents in the early intrajejunal nutrition group were higher than those in the parenteral nutrition group, which were then decreased. The mean number and area of zymogen granules did not show any significant statistical difference in both groups on d i or on d 7 （P 〉 0.05）. CONCLUSION： Early intrajejunal nutrition might be effective in dogs with acute pancreatitis.

关键词： Parenteral nutrition Enteral nutrition Digestive enzyme Acute pancreatitis

NO_3^-/NH_4^+ ratios affect plant growth, chlorophyll content,respiration rate, and morphological structure in Malus hupehensis seedlings

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Journal of Forestry Research 2015年第4期26卷 983-991页

作者： Yu dong huan-huan Zhi Qian Zhao Jun-feng Guan Plant Genetic Engineering Center of Hebei Province Institute of Genetics and PhysiologyHebei Academy of Agricultural and Forestry Sciences School of Food and Bioengineering Zhengzhou University of Light Industry

Malus hupehensis （Pamp.） Rehd. is a widely cultivated rootstock in China. We studied the effect of three NO3-/NH4＋ ratios （100/0, 50/50, and 0/100, molar basis） at total nitrogen （N） concentration of 8 mmoL L-1 in a nutrient solution on M. hupehensis seedlings. Plant biomass, NO3- and NH4＋concentrafion, chlorophyll con- tent, respiratory rate, and cellular structure were investi- gated. M. hupehensis seedlings at the NO3-/NH4＋ ratio of 50/50 had the highest level of fresh weight, dry weight, shoot length, and chlorophyll （a, b, and a ＋ b） content, but the lowest respiration rate in the leavesand roots. In addition, thickness and numbers of palisade and spongy tissue cells of the leaves were greater with this treatment than with other treatments. At the NO3-/NH4＋ ratio of 100/0, the leaves and roots had higher NO3- concentration and lower NH4＋ concentration. However, the opposite trend occurred at the NO3-/NH4＋ ratio of 0/100. Chloro- phyll （a, b, and a ＋ b） content was lowest at the NO3-/NH4＋ ratio of 100/0 than at the other ratios. At the NO3-/ NH4＋ ratio of 0/100, oxygen （02） consumption increased in the leaves and roots, and irregular epidermis and cortex cells were observed in the root apical meristematic and mature region. Our results indicated that the NO3-INH4＋ ratio at 50/50 was suitable for growth of M. hupehensis seedling to achieve the highest biomass production and efficiency.

关键词： Cellular structure Chlorophyll content Malus hupehensis (Pamp.) Rehd. NO3- NH4+ Respiratory rate

Initial result of the Chinese Deep Space Stations' coordinates from Chinese domestic VLBI experiments

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Science China(Information Sciences) 2017年第1期60卷 170-176页

作者： Guangliang dong Dezhen XU Haitao LI huan ZHOU Beijing Institute of Tracking and Telecommunications Technology

China's Lunar Exploration Program(CLEP) prompted the design and construction of the globally distributed Chinese Deep Space Network(CDSN). This network consists of Jiamusi and Kashi stations in China, and Zapala station in Argentina. However, the positions of Jiamusi and Kashi are not accurate enough for future Chinese deep space missions, and geodetic Very Long Baseline Interferometry(VLBI) is the most effective way to determine their positions. Since the CDSN stations are equipped with narrow-band receivers,they cannot participate in current international VLBI sessions in which wide-band frequencies are utilized. Thus a cooperative geodetic program of the CDSN and Chinese VLBI Network(CVN, the VLBI tracking subsystem of the CLEP) was initiated to determine their positions, in which specially designed frequencies can be utilized,and some CVN stations can act as position reference stations owing to their precise positions from long-term international VLBI observations. Primary results have been obtained from the CDSN–CVN combined domestic VLBI experiments from September 28, 2014, through December 10, 2015. The positions of Jiamusi and Kashi are determined to be better than 10-mm precision in the X, Y, and Z directions, which are improved by a factor of approximately 20 over their a priori values.

关键词： VLBI Chinese Deep Space Network Chinese VLBI Network station position determination terrestrial reference frame

Experimental study on simultaneous desulfurization and denitrifi- cation based on highly active absorbent

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Journal of Environmental Sciences 2006年第2期18卷 281-286页

作者： ZHAO Yi XU Pei-yao FU dong huanG Jian-jun YU huan-huan School of Environmental Science and Engineering North China Electric Power University Baoding 071003 China

Simultaneous removal of SO2 and NO from flue gas by the highly active absorbent prepared from fly ash, lime and a few oxidizing manganese compound additive was studied using a flue gas circulating fluidized bed （CFB） under different experimental conditions. The effects influencing the removal effiencies were discussed. The optimal flue gas temperature, flue gas humidity, gas velocity of CFB and Ca/（S＋N） molar ratio with this process were approximately 110℃, 6%, 1.8 m/s and 1.05, respectively. Removal efficiencies of 92.3% for SO2 and 60.88% for NO were obtained under the optimal experimental conditions. While the spent absorbent appeared in the form of dry powder, the mechanism of removal for SO2 and NO based on the highly active absorbent was investigated by a scanning electron microscope （SEM）, a X-ray energy spectrometer and the chemical analysis methods. The valuable references can be provided for industrial application by the process. The foreground of application will be vast in China and in the world.

关键词： simultaneous desulfurization and denitrifieation CFB removal efficiency mechanism

Self-generating nanogaps for highly effective surface-enhanced Raman spectroscopy

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Nano Research 2022年第4期15卷 3496-3503页

作者： Yangkai Chen huan Li Jianmei Chen dong Li Mengyuan Zhang Guanghua Yu lin Jiang Yi Zong Bin dong Zhoufang Zeng Yandong Wang Lifeng Chi Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Joint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Research and Development Center for Genetics Resource Chinese Academy of SciencesChangzhou 213000China Institute of Genetics and Development Biology Chinese Academy of SciencesBeijing 100101China

The fabrication of surface enhanced Raman spectroscopy(SERS)substrates with controlled high density hot spots still remains ***,we report highly effective SERS substrates containing the self-generating(SG)nanogaps from polystyrene nanosphere monolayer through isotropic plasma *** emergence of multimode hot spots,i.e.,metal film over nanosphere(MFON)-like hot spots(closed gaps,0 nm),individual self-aligned hot spots(discrete gaps,>20 nm)and threedimensional(3D)hot spots(nanogaps,1-10 nm),makes the SG SERS substrates superior as compared to the traditional MFON or the well-ordered self-aligned SERS substrates in terms of enhancement,uniformity,and *** SG SERS substrates can function as the excellent SERS platforms for trace molecule detection in the practical application fields.

关键词： surface-enhanced Raman spectroscopy nanogaps colloidal lithography reactive ion etching

New Matrix Loop Algebra and Its Application

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Communications in Theoretical Physics 2008年第8期50卷 321-325页

作者： dong huan-He XU Yue-Cai College of Information Science and Engineering Shandong University of Science and Technology Qingdao 266510 China College of Continuing Education Shangdong University of Science and Technology Taian 271000 China

A new matrix Lie algebra and its corresponding Loop algebra are constructed firstly,as its application,the multi-component TC equation hierarchy is obtained,then by use of trace identity the Hamiltonian structure of the above system is ***,the integrable couplings of the obtained system is worked out by the expanding matrix Loop algebra.

关键词： matrix loop algebra Liouville integrable system Hamiltonian structure integrable couplings

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao Guo Hui Bojing Sun dongfang Hou Meidi Wang Xueqian Wu Tao Wu dong-Sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

Simple, Rapid and Sensitive Detection of Pseudomonas aeruginesa by Colorimetric Multiple Cross Displacement Amplification

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Current Medical Science 2020年第2期40卷 372-379页

作者： dong-xun LI Gao-lin SHU Wei-jun WANG Yang WU huan-cai NIU Changping District Center for Disease Control and Prevention Bejing 102206China

Pseudomonas aeruginosa(P:aeruginosa)is a major opportunistic pathogen in hospital-acquired ***,carly diagnosis is the best strategy for fighting against these *** this report,we incorporated multiple crOsS displacement amplification(MCDA)combined with the malachite green(MG)for rapid,sensitive,specific and visual detection of *** by targeting the oprl *** MCDA-MG assay was conducted at 67°C for only 40 min during the amplification stage,and then products were directly detected by using colorimetric indicators(MG),eliminating the use of an electrophoresis instrument or amplicon analysis *** entire process,including specimen processing(35 min),amplification(40 min)and detection(5 min),can be finished within 80 *** 30 *** strains tested negative,indicating the high specificity of the MCDA *** analytical sensitivity of the MCDA-MG assay was 100 fg of genomic templates per reaction in pure culture,which was in complete accordance with MCDA by gel clectrophoresis and real-time *** assay was also successfully applied to detecting *** in stool ***,the rapidity,simplicity,and nearly equipment free platform of the MCDA-MG technique make it possible for clinical diagnosis,and more.

关键词： Pseudomonas aeruginosa multiple cross displacement amplification malachite green multiple cross displacement amplification combined with the malachite green