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Study on the flow field uniformity of hydro-floating ship lift combined type hydraulic-driven system based on the residual energy theory

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Journal of Hydrodynamics 2022年第6期34卷 1156-1161页

作者： bo Wu ya-an Hu Shu xue State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan430072China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing210029China Key Laboratory of Transport Technology in Navigation Building Construction Nanjing Hydraulic Research InstituteNanjing210029China

The hydro-floating ship lift originally invented in China is a major innovation in the field of navigation *** shaft water levels synchronization of its unique hydraulic-driven system plays a crucial role in reducing the torque of the synchronous shafts and ensuring the safety and stability operation of the ship *** study aims to investigate the muti-shaft water level synchronization and the flow velocity uniformity of the combined type hydraulic-driven *** on the theory of residual energy,a new index m2 proposed in this study is more suitable for evaluating the flow velocity uniformity of the combined hydraulic-driven ***,the critical value of m2=75 is calculated via the results of the scaled physical mode test as the threshold of water flow uniformity,and it provides a basis for determining the reasonable height of the pressure stabilizing chamber.

关键词： Hydro-floating ship lift water levels synchronism residual energy velocity distribution uniformity coefficient

A New Rhamphorhynchid Pterosaur(Pterosauria) from the Middle Jurassic Tiaojishan Formation of Western Liaoning,China

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Acta Geologica Sinica(English Edition) 2011年第5期85卷 977-983页

作者： Junchang Lü xue bo Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China yizhou Museum Yixian 121100 Liaoning Province China

A new Sordes-like pterosaur Jianchangopterus zhaoianus *** *** erected based on a almost complete skeleton with skull *** is characterized by the following characters:seven and six pairs of upper jaw and lower jaw teeth respectively;the development of a recess on maxilla;the evenness of the dental margin in lateral view;a distinct central ridge along dorsal surface of the mandibular symphysis;wing phalanx 4 with strongly curved shaft approximately 96%the length of the wing phalanx *** discovery of a Sordes-like pterosaur Jianchangopterus,and other taxa from the same formation indicates that pterosaurs reached great diversities during the Middle to Upper Jurassic period.

关键词： Scaphognathinae Jianchangopterus Tiaojishan Formation

The Darboux Transformation and New Explicit Solutions for the Belov–Chaltikian Lattice

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Chinese Physics Letters 2012年第10期29卷 1-4页

作者： xue bo WANG Xin Department of Mathematics Zhengzhou UniversityZhengzhou 450001

An N-fold Darboux transformation with multi-parameters for the famous Belov–Chaltikian lattice is derived with the aid of the gauge transformation between the corresponding discrete 3×3 matrix *** using the Darboux transformation and the reduction technique,new multi-soliton solutions for the Belov–Chaltikian lattice,which are proved to be of solitary features,are given in the exponential form.

关键词： spectra form Darboux

Non-commutative Arithmetics on Thompson's Monoid

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1586-1626页

作者： bo Qing xue Institute of Mathematical Sciences ShanghaiTech UniversityShanghai 201210P.R.China

The main purpose of this paper is to define prime and introduce non-commutative arithmetics based on Thompson's group *** primes in a non-abelian monoid is highly non-trivial,which relies on a concept called"castling".Three types of castlings are essential to grasp the *** divisor functionτon Thompson's monoid S satisfiesτ(uv)≤τ(u)τ(v)for any u,v∈*** the limitτ_(0)(u)=lim_(n→∞)(τ(u~n))^(1/n)*** quantityC(S)=sup_(1≠u∈S)τ_(0)(u)/τ(u)describes the complexity for castlings in *** show thatC(S)=***,the MCbius function on S is *** the Liouville functionCon S is studied.

关键词： Thompson's group non-commutative arithmetics castling complexity divisor function M?bius function

Review of high thermal conductivity polymer dielectrics for electrical insulation

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High Voltage 2016年第1期1卷 34-42页

作者： Meng Xiao bo xue Du School of Electrical Engineering and Automation Tianjin UniversityTianjin 300072People’s Republic of China Economic and Technical Research Laboratory Jinan Power-supply CompanyJinan 250012ShandongPeople’s Republic of China

Traditional insulation material is thermally insulating and has a low thermal *** miniaturisation and higher power of electrical devices would generate lots of heat,which have created new challenges to safe and stable operation of the *** development of insulating materials with high thermal conductivity provides a new method to solve these *** improvement of thermal conductivity would increase the ability to conduct heat and greatly reduce the operating temperature of the electrical equipment,which could reduce the equipment size and extend service *** the other hand,inorganic thermally conductive particles and the improved thermal conductivity may have great effect on thermal *** this study,the factors affecting the thermal conductivity of dielectric polymer composites were *** thermal conductive polymer and particle-filled thermal conductive composites were *** of thermal conductivity,shape,size,surface treatment of the particle and prepare process on thermal properties of the composites were *** study focused on the electrical and thermal properties of thermally conductive epoxy,polyimide and polyethylene *** failure caused by thermal accumulation is a typical thermal breakdown *** performance of the resistance to tracking failure was studied for these *** results showed that thermal conductive particles improved the resistance to tracking ***,application of thermally conductive epoxy in electrical equipment was discussed.

关键词： composites conductivity electrical

Impact of Hinterland Manufacturing on the Development of Container Ports: Evidence from the Pearl River Delta, China

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Chinese Geographical Science 2024年第5期34卷 886-898页

作者： HONG Haolin WANG bo xue Desheng School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510006China

Container ports and hinterland manufacturing are two important forces of the local participation in economic *** study,taking the Pearl River Delta(PRD),China with an export-oriented economy as an example,applies Huff and panel regres-sion models to evaluate the impact of hinterland manufacturing on the development of container ports during the period of 1993–*** results show that 1)the spatial patterns of hinterlands for hub ports help to determine the distribution range and scale of economic variables that affect port throughput;2)the hinterland’s gross manufacturing output has universally positive influence on port through-put,wherein export-oriented processing and the entire manufacturing industry have significantly positive impact on port throughput in 1993–2011 and 2001–2019,respectively;3)the two internal structural factors related to an export-oriented economy,labor-intensive sectors and foreign-funded terminals,have positively moderate the direct influence of hinterland manufacturing on port *** results highlight the importance of local context in understanding port-manufacturing relationship in developing *** on our findings,policy implications are further proposed to enhance port network organization in PRD.

关键词： container ports hinterland manufacturing local development context Huff model panel regression model Pearl River Delta(PRD),China

Calibration Curve Establishment and Fractionation Temperature Selection of Polyethylene for Preparative Temperature Rising Elution Fractionation

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Chinese Journal of Polymer Science 2015年第7期33卷 1000-1008页

作者： yan-hu xue Shu-qin bo 姬相玲 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences

A series of copolymers of ethylene with 1-hexene synthesized using a metallocene catalyst are selected and mixed. The blend is fractionated via preparative temperature rising elution fractionation（P-TREF）. All fractions are characterized via high-temperature gel permeation chromatography（GPC）, 13 C nuclear magnetic resonance spectroscopy（13C-NMR）, and differential scanning calorimetry（DSC）. The changes in the DSC melting peak temperatures of the fractions from P-TREF as a function of elution temperature are almost linear, thereby providing a reference through which the elution temperature of TREF experiments could be selected. Moreover, the standard calibration curve（ethylene/1-hexene） of P-TREF is established, which relates to the degree of short-chain branching of the fractions. The standard calibration curve of P-TREF is beneficial to study on the complicated branching structure of polyethylene. A convenient method for selecting the fractionation temperature for TREF experiments is elaborated. The polyethylene sample is fractionated via successive self-nucleation and annealing（SSA） thermal fractionation. A multiple-melting endotherm is obtained through the final DSC heating scan for the sample after SSA thermal fractionation. A series of fractionation temperatures are then selected through the relationship between the DSC melting peak temperature and TREF elution temperature.

关键词： TREF Calibration curve Fractionation temperature SSA Polyethylene

Comparison of Chain Structures between High-speed Extrusion Coating Polyethylene Resins by Preparative Temperature Rising Elution Fractionation and Cross-fractionation

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Chinese Journal of Polymer Science 2015年第11期33卷 1586-1597页

作者： yan-hu xue Shu-qin bo 姬相玲 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences

Two polyethylene（PE） resins（samples A and B） are synthesized as high-speed extrusion coatings with similar minimum coating thickness and neck-in performance but different maximum coating speeds. both samples are separated into seven fractions using preparative temperature rising elution fractionation. The microstructures of the original samples and their fractions are studied by high-temperature gel permeation chromatography, Fourier transform infrared spectroscopy, 13 C nuclear magnetic resonance spectroscopy, differential scanning calorimetry, and successive self-nucleation/annealing thermal fractionation. Compared with sample B, sample A has a broader MWD, more LCB contents, and less SCB contents. Moreover, sample A contains slightly more 30 ℃ and 50 ℃ fractions with lower molecular weights, and more fractions at 75 ℃ and 85 ℃ with higher molecular weight. The chain structure and its distribution in the two PE resins are studied in detail, and the relationship between the chain structure and resin properties is also discussed.

关键词： Polyethylene High-speed extrusion coating Chain structure TREF Cross-fractionation

Facile Fabrication of Hierarchically Porous Carbonaceous Monoliths with Ordered Mesostructure via an Organic Organic Self-Assembly

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Nano Research 2009年第3期2卷 242-253页

作者： Chunfeng xue bo Tu Dongyuan Zhao Department of Chemistry Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsKey Laboratory of Molecular Engineering of PolymersLaboratory of Advanced MaterialsFudan UniversityShanghai 200433China

A simple strategy for the synthesis of macro-mesoporous carbonaceous monolith materials has been demonstrated through an organic organic self-assembly at the interface of an organic scaffold such as polyurethane(PU)*** porous carbonaceous monoliths with cubic(Im m)or hexagonal(p6mm)mesostructure were prepared through evaporation induced self-assembly of the mesostructure on the three-dimensional(3-D)interconnecting struts of the PU foam *** preparation was carried out by using phenol/formaldehyde resol as a carbon precursor,triblock copolymer F127 as a template for the mesostructure and PU foam as a sacrificial monolithic *** hierarchical pore system was macroscopically fabricated with cable-like mesostructured carbonaceous *** carbonaceous monoliths exhibit macropores of diameter 100450μm,adjustable uniform mesopores(3.87.5 nm),high surface areas(200870 m2/g),and large pore volumes(0.170.58)cm3/*** with the corresponding evaporation induced self-assembly(EISA)process on a planar substrate,this facile process is a time-saving,labor-saving,space-saving,and highly effi cient pathway for mass production of ordered mesoporous materials.

关键词： Self-assembly synthesis mesoporous materials carbonaceous monolith templating macroporous materials