Shijiazhuang, China

Hebei University of Science and Technology is one of the key, multi-disciplinary universities in Shijiazhuang, Hebei province. It offers undergraduate degrees in science and engineering courses. Wikipedia.


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Yu X.,Fudan University | Yu X.,Hebei University of Science and Technology | Chen L.,Fudan University | Zhang M.,Fudan University | Yi T.,Fudan University
Chemical Society Reviews | Year: 2014

In this review, we focus on the types of smart supramolecular gels whose self-assembly processes are affected or even triggered by physical forces including sonication and mechanical stress (mechanical force). The types of gels that are responsive to sonication and mechanical stress are examined and summarised. The gels exhibit non-covalent interactions among the gelator molecules and show dynamic and reversible properties controlled by the stimuli. Upon stimulation, the gelators cause instant and in situ gelation of organic solvents or water with different modes and outcomes of self-assembly. On the other hand, sonication and mechanical stress, as external factors, can give rise to dynamic changes in microscopic morphology, optical properties, etc. Certain thixotropic supramolecular gels exhibit perfect self-healing characteristics. The driving forces and the mechanism of the self-assembly process and the responsive outcome of morphological and spectroscopic changes are discussed. Those supramolecular gels responding to sonication and mechanical stress offer a wide range of applications in fields such as smart and adaptive materials, switches, drug control and release, and tissue engineering. This journal is © the Partner Organisations 2014.


Yao W.,Hebei University of Science and Technology
Fuzzy Sets and Systems | Year: 2010

This paper deals with quantitative domain theory via fuzzy sets. It examines the continuity of fuzzy directed complete posets (dcpos for short) based on complete residuated lattices. First, we show that a fuzzy partial order in the sense of Fan and Zhang and an L-order in the sense of Bělohlávek are equivalent to each other. Then we redefine the concepts of fuzzy directed subsets and (continuous) fuzzy dcpos. We also define and study fuzzy Galois connections on fuzzy posets. We investigate some properties of (continuous) fuzzy dcpos. We show that a fuzzy dcpo is continuous if and only if the fuzzy-double-downward-arrow-operator has a right adjoint. We define fuzzy auxiliary relations on fuzzy posets and approximating fuzzy auxiliary relations on fuzzy dcpos. We show that a fuzzy dcpo is continuous if and only if the fuzzy way-below relation is the smallest approximating fuzzy auxiliary relation. © 2009 Elsevier B.V. All rights reserved.


Jiang W.,Hebei University of Science and Technology
Nonlinear Analysis: Real World Applications | Year: 2012

By using the coincidence degree theory due to Mawhin and constructing suitable operators, we study the existence of solutions for a coupled system of fractional differential equations at resonance. An example is given to illustrate our result. © 2012 Elsevier Ltd. All rights reserved.


Cui H.T.,Hebei University of Science and Technology
Applied Thermal Engineering | Year: 2012

An experimental setup was designed and built in which the paraffin was used as phase change materials and copper foam as filled materials. Experiments examining the heat charging process were carried out under two conditions: paraffin filled with and without copper foam. The time histories of the collected temperature under various conditions were plotted and the results were discussed. The results indicate that the foam material not only leads to a more uniform temperature distribution within the thermal energy storage unit, but also extensively shortens the charging time. © 2011 Elsevier Ltd. All rights reserved.


Yao W.,Hebei University of Science and Technology
Fuzzy Sets and Systems | Year: 2011

In this paper, based on a complete Heyting algebra L, we define a fuzzy version of frames, called L- frames. Then we construct an adjunction between the category of stratified L- topological spaces and that of L- locales (the opposite category of L- frames), which is a fuzzy counterpart of the Isbell-adjunction between topological spaces and locales. We also study the corresponding sobriety of stratified L- topologies and spatiality of L- frames and show the dual equivalence between them. © 2010 Elsevier B.V.


Patent
Hebei University of Science and Technology | Date: 2016-06-01

A multi-function cooling and thermo-sensitive rack for microbiology experiment includes horizontal bars (1), a base (3), positioning holes (4), connectors (5), a lateral frame (6), and connecting holes (7). The lateral frame (6) is a U-shaped frame and dimensionally identical to the base (3). The lateral frame (6) and the base (3) are connected through the connectors. Arms of the U-shaped frame of the lateral frame (6) are symmetrically provided with plural connecting holes (7) thereon. The horizontal bars (1) are horizontally fixed in the connecting holes (7). The multi-function cooling and thermo-sensitive rack further includes a temperature-displaying prompter (8) and N temperature sensors (9), or the horizontal bars (1) and/or the base (3) are thermochromic.


Patent
Hebei University of Science and Technology | Date: 2015-08-20

A multi-function cooling and thermo-sensitive rack includes horizontal bars, a base, positioning holes, connectors, a lateral frame, connecting holes, a temperature-displaying prompter, and N temperature sensors. The lateral frame and the base are connected through the connectors. The lateral frame and the base have their surfaces facing each other symmetrically provided with plural connecting holes thereon. The horizontal bars have two ends thereof received in the corresponding symmetrical connecting holes. The positioning holes are distributed over the surface of the base. The N temperature sensors have output ends thereof for outputting sensing signals connected with input ends of the temperature-displaying prompter for inputting the N temperature-sensing signals. The present invention is applied to apparatuses used in microbiology experiment.


Yao W.,Hebei University of Science and Technology
Fuzzy Sets and Systems | Year: 2012

This paper presents a definition of (L,M)-fuzzy nets and the corresponding (L,M)-fuzzy generalized convergence spaces. It establishes a Moore-Smith convergence in (L,M)-fuzzy topology. It is shown that the category (L,M)-GConv of (L,M)-fuzzy generalized convergence spaces is topological, which embeds the category of (L,M)-fuzzy topological spaces as a reflective subcategory. It also defines a strong (L,M)-fuzzy generalized convergence space and shows that the resulting category S(L,M)-GConv is topological and Cartesian-closed, which also embeds the category of (L,M)-fuzzy topological spaces as a reflective subcategory and can be embedded in (L,M)-GConv as a coreflective subcategory. As a special case, (2,M)-GConv is cartesian-closed. © 2011 Elsevier B.V.


Patent
Hebei University of Science and Technology | Date: 2016-06-01

An assembled sterilization rack for sterile experiment is provided and includes a lateral frame, retaining wires, connectors, a base frame, heat resistant rods, connecting rings, a temperature-displaying control unit, and N temperature sensors. The lateral frame and the base frame are connected through the connectors. The lateral frame and the base frame have their surfaces facing each other provided with a plurality of retaining wires. The heat resistant rods have two ends mounted on the symmetrically arranged retaining wires, respectively. The base frame has its upper surface provided with a plurality of connecting rings. The heat resistant rods have the two ends received in the symmetrically arranged connecting rings, respectively. The N temperature sensors are connected with the temperature-displaying control unit. The device is used for supporting inoculation loops and applicators used in experiment involving culture of microorganisms and cells, and also in cell culture experiment, can be applied to support elements used for vertical culture of cells in rectangular culture dishes.


Patent
Hebei University of Science and Technology | Date: 2015-08-20

An assembled sterilization rack for sterile experiment relates to supporting devices used in experiment involving culture of microorganisms and/or cells. The rack includes a lateral frame, retaining wires, connectors, a base frame, heat resistant rods, connecting rings, a temperature-displaying control unit, and N temperature sensors. The lateral frame and the base frame are connected through the connectors. The lateral frame and the base frame have their surfaces facing each other provided with a plurality of retaining wires. The rods have two ends mounted on the symmetrically arranged retaining wires, respectively. The base frame has its upper surface provided with a plurality of connecting rings. The rods have the two ends received in the symmetrically arranged connecting rings, respectively. The temperature sensors are connected with the temperature-displaying control unit. In cell culture experiment, this invention can be applied to support elements used for vertical culture of cells in rectangular culture dishes.

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