31 results about "Energy migration" patented technology

The present invention provides an organic glowing device.The organic light emitting device includes the first electrode, the second electrode, and the light layer between the first electrode and the second electrode.The device also contains fluorescent doping agents and fluorescent main body containing at least two kinds of cave transmission materials.The mixed fluorescent main material improves energy migration efficiency, thereby improving the efficiency and life of the organic lighting device obtained.

The invention discloses a passive lower limb exoskeleton device for achieving human body energy migration. The passive lower limb exoskeleton device comprises a sole pressure sensor assembly arrangedon an insole, a lower limb connecting assembly is arranged at the back end of the insole, a plurality of control switch assemblies in signal connection with the sole pressure sensor assembly are hinged to the back side of the lower limb connecting assembly, and a bionic spring assembly is in sliding connection to each control switch assembly and is matched with the control switch assembly in a clamped manner to achieve limitation; and sole pressure sensors are used for collecting signals, the signals are used for controlling switches, then the stretching / contracting states of the bionic springassemblies are controlled, energy generated when the knee joint does negative work in the human body walking process is converted into elastic potential energy to be collected and stored, and the energy is transferred to the ankle joint in the standing phase later period, and energy dissipation of muscle during positive work doing of the ankle joint is reduced. By means of the passive lower limbexoskeleton device, external connection energy resources are avoided, the structure is simple, the mass is small, and wearing is convenient.

The invention discloses a multiband fluorescence loss method, a multicolor super-resolution imaging method and a device. Multiband fluorescence refers to up-conversion fluorescence emitted in the process of electrons reaching a Tm<3+> high energy level and then sequentially migrating energy to the Gd<3+> ions and shell activated ions X<3+> in the Yb<3+> / Tm<3+> sensitization and up-conversion process of an other activated ions-doped shell wrapping a NaGdF4:Yb<3+> / Tm<3+> core. The up-conversion fluorescence can be different by changing the activated ions by means of the same sensitization, up-conversion and energy migration process. The fluorescence loss process is the process of loss of electrons of the Tm<3+> high energy level and the loss of multiband fluorescence emitted during the transfer of the Tm<3+> high energy level from Gd<3+> to X<3+>, caused by the stimulated emission transition of intermediate energy level electrons to a low energy level in the up-conversion process by using the stimulated emission of laser with the wavelength nearby 810 nm between the Tm<3+> matching energy levels. Nano-particles of different activated ions are synthesized based on the fluorescence loss method, and multicolor super-resolution microscopy imaging is realized using the same pair of excitation light and hollow loss light. An optical system is greatly simplified, and the cost of the system is reduced.

A method of transferring energy in an optical fiber structure is disclosed. This method transfers energy from a cladding element of the fiber structure to a core element of the fiber structure. The core element includes an active gain component and an energy migration component. The cladding element, which surrounds the core element, includes the energy migration component. The structure and method can be utilized to provide either an optical fiber laser or an optical fiber amplifier. The method includes the steps of providing a pump for producing the energy and optically coupling the pump with the cladding element. The cladding element, including the energy migration component, is then pumped with the energy produced by the pump such that the energy is absorbed and stored in the cladding element by the energy migration component. The method further includes the step of transferring the energy stored in the cladding element to the core element by migration of the energy within the energy migration component to the active gain component such that the active gain component in the core element lases or provides gain.

Strontium and strontium calcium aluminates and lanthanum and lanthanum magnesium borates activated with Pr3+ and Mn2+ exhibit characteristics of quantum-splitting phosphors. Improved quantum efficiency may be obtained by further doping with Gd3+. Refined rules for designing quantum-splitting phosphors include the requirement of incorporation of Gd3+ and Mn2+ in the host lattice for facilitation of energy migration.

The invention discloses an anti-mode-coupling few-mode signal complex format analysis method and device, and aims to solve the problems of poor modulation format identification effect and high training cost of an elastic optical network based on few-mode optical fibers; a wavelength division multiplexing technology is taken as a source domain and a mode division multiplexing technology is taken as a target domain through a domain self-adaption theory. The stimulated Raman scattering effect is analogous to the mode coupling effect, so that the neural network learns the law of energy migration. Compared with a retrained network model, the method can realize modulation format identification of the few-mode signal only by using a small amount of few-mode data, significantly reduces the training cost of the neural network, accelerates the convergence rate of the network model, and reduces the model training time and calculation complexity. Meanwhile, by means of the theoretical advantages of transfer learning, the network has better generalization ability and recognition performance, can adapt to the influence of mode coupling in the few-mode optical fiber on the modulation format, and achieves the modulation format recognition task of the few-mode optical network.

The invention discloses a passive upper limb assistance exoskeleton device capable of achieving human body energy migration. The passive upper limb assistance exoskeleton device comprises shoulder assemblies, manual air compressors are arranged on the two sides of each shoulder assembly, and the manual air compressors are fixed to the shoulder assemblies through sleeves. Pneumatic muscles are arranged on the two sides of the front faces of the shoulder assemblies, and the lower ends of the pneumatic muscles are fixed with front arm sleeves through front arm supports. A back support is arrangedon the back portions of the shoulder assemblies, and an air pressure control system is arranged on the back support. The air pressure control system is connected with the pneumatic muscles, the manual air compressors and hand pressure sensing devices, and the hand pressure sensing devices, the manual air compressors, and the shoulder assemblies are fixedly put on the palms, the upper arms and theshoulders of a user through binding belts or tying buckles. The passive upper limb assistance exoskeleton device is free of external energy supply, can achieve the assistance function through self energy of a human body, and is simple in structure, low in weight and capable of working under any environment.

A method of transferring energy in an optical fiber (12) from the fiber's cladding element (16) of the fiber's core element (14) is disclosed. The core element (14) includes an active gain component and an energy migration component, and the cladding element (16), which surrounds the core element (14), includes the energy migration component. The method includes the steps of providing a pump (22) for producting energy and optically coupling the pump with the cladding element (16), such that the energy is absorbed and stored in the cladding element (16) by its energy migration component. A further step includes the active gain component in the core element (14) lasing or providing gain, when the transferring of energy from the cladding element's energy migration component to the core element's energy migration component takes place.

Strontium and strontium calcium aluminates and lanthanum and lanthanum magnesium borates activated with Pr3+ and Mn2+ exhibit characteristics of quantum-splitting phosphors. Improved quantum efficiency may be obtained by further doping with Gd3+. Refined rules for designing quantum-splitting phosphors include the requirement of incorporation of Gd3+ and Mn2+ in the host lattice for facilitation of energy migration.

The invention discloses a method for simulating the spontaneous combustion of coal stacks. The method is characterized by comprising the following steps: based on the particle characteristics of the coal stacks, establishing a coal stack spontaneous combustion model by using PFC3D as a simulation, and simulating the spontaneous combustion oxidiation of the coal stacks and the temperature field change and energy migration during the process by using a thermal coupling model; simulating the flowing of oxygen and reaction of the oxygen and coal by using small particles, and achieving the process through FISH. The method comprises the following steps: establishing a coal stack model and an oxygen flowing model, and analyzing a temperature field and a flow field. The method can be used for analyzing the spontaneous combustion process of the certain scale coal stacks.

The invention discloses an impeller optimization design method for preventing a targeted energy transfer phenomenon during vibration of an impeller. On the basis of traditional static strength analysis and design, dynamic characteristics of the impeller under the detuned ideal condition are analyzed, the forbidden band and the pass band of the impeller are recognized, then all frequency components of an excitation source borne by the impeller are listed, whether the frequency components fall into the forbidden band is judged, an impeller mechanism is required to be amended and optimized under the condition that the frequency components fall into the forbidden band, and thus the targeted energy migration phenomenon is prevented during vibration of the impeller. The method has the guiding significance in design and manufacturing of a new generation of centrifugal impellers, the problem of local large-amplitude vibration in the running process of the impeller can be effectively solved, damage caused by vibration can be reduced, and the failure rate in the running process of the impeller can be reduced, so that a centrifugal impeller unit can run safely and reliably for a long time. The safety and the high efficiency of the impeller designed with the method can be improved to a large extent.

The invention relates to a thioxanthone photo-initiation group modified hyperbranched LED resin and a preparation method thereof, wherein the thioxanthone photo-initiation group modified hyperbranched LED resin takes TMP as a core and a hyperbranched unit as a shell, and contains a plurality of functional active groups, a plurality of thioxanthone photo-initiation groups and a plurality of branched chain bulk alkane groups. The thioxanthone photo-initiation group modified hyperbranched LED resin has the characteristics that 1) energy migration and intermolecular reaction in a polymer chain are easier, and the self-initiation efficiency is high; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; 4) the thioxanthone photo-initiation group modified hyperbranched LED resin has characteristics of high solid content, low viscosity, pigment bearing performance and storage stability; and 5) the defects caused by a small-molecule photoinitiator are overcome. The hyperbranched LED resin prepared by the invention has excellent flexibility, adhesive force, chemical resistance, heat resistance, aging resistance, oil resistance, wear resistance, pollution resistance and impact strength, is odorless in coating, and is used for LED colored floor coating materials, LED woodware coating materials, LED alloy coating materials, LED circuit board ink and LED plastic coating materials.

The invention relates to thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin and a preparation method thereof. The LED-UV water-based resin contains two active groups and a thioxanthone photo-initiation group, and has the following characteristics that: 1) energy migration and intermolecular reaction in a polymer chain are easier, and under the irradiation of an LED-UV lamp, high self-initiation activity is realized; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; and 4) the defects caused by a small-molecule photoinitiator are overcome. The prepared LED-UV water-based resin has excellent adhesive force, water resistance, aging resistance, chemical resistance and odor removal effect, also has the characteristics of high gloss, high wear resistance, high fullness, impact resistance, good flexibility and the like, and is widely applied to LED colored perfume bottle coatings, LED wood coatings, LED alloy coatings, LED circuit board ink, LED plastic coatings and the like.

The invention discloses a compressor blade crack fault detection method, which comprises the following steps of: collecting acoustic emission signals of two channels of an air outlet of a compressor, and dividing the acoustic emission signals into training samples and test samples; extracting an acoustic emission feature, a time domain feature, a frequency domain feature and a spectrum centroid energy migration feature of the training sample; performing feature selection by using a mixed feature selection method, and determining an optimal feature subset; establishing a two-channel training sample and a test sample feature subset; and combining the two channel training sample feature subsets, training by using a long short-term memory neural network, and finally carrying out blade crack fault classification and detection on a test sample by using the trained long short-term memory neural network to realize crack fault detection of the compressor blade. The method is simple and easy to implement, compared with other existing fault feature and crack detection technologies, the spectral centroid energy migration feature capable of effectively reflecting the blade fault feature can be established, and mixed feature selection and compressor blade crack fault detection are achieved.

The invention belongs to the technical field of luminescent materials, and particularly relates to a small-size holmium-based up-conversion nano material with red light emission and a preparation method thereof. According to the up-conversion nano material, NaHoF4 serves as a core layer, a NaYF4: Tb shell layer, a NaGdF4: Yb, a Tm shell layer and a NaYF4 passivation layer sequentially coat the core layer, excitation energy is transmitted to the core layer from the second shell layer by sequentially utilizing interface energy transmission of a Gd<3+>: 6P7 / 2 energy level to a Tb<3+>: 5D4 energy level, energy migration between Tb<3+>: 5D4 energy levels and interface energy transmission of the Tb<3+>: 5D4 energy level to Ho<3+>: 5S2 / 5F4 energy level, a cross relaxation effect (5S2 / 5F4 + 5I7 -> 5F5 + 5I6) between Ho<3+> ions is caused, and finally Ho<3+>-based red up-conversion luminescence is obtained. The preparation process of the up-conversion nano material is simple, short in period, low in equipment cost, simple to operate and suitable for mass production.

The invention relates to an amine-containing thioxanthone polyurethane modified epoxy acrylate LED light-cured resin and a preparation method thereof. The LED resin contains three active groups and one amine-containing thioxanthone photo-initiation group; the LED light-cured resin has the following characteristics: 1) energy migration and intermolecular reaction in a polymer chain are easier, and the resin has high self-initiation activity under UV-LED light; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; and 4) a tertiary amine co-initiator does not need to be added, the photocuring efficiency is high, and the defects caused by a bimolecular photoinitiation system are overcome. The LED resin prepared by the method has excellent adhesive force, water resistance, aging resistance, chemical resistance and coating odor removal property, also has high wear resistance, high fullness, high tensile strength and excellent flexibility, and is widely applied to UV floor coating, UV wood coating, UV alloy coating, UV circuit board ink, UV plastic coating and the like.

The invention relates to thioxanthone photo-initiation group modified third-generation dendritic LED (light-emitting diode) resin and a preparation method thereof. Neopentyl glycol is used as a core, a dendritic structure is used as a shell, and the resin contains a plurality of functional active groups, thioxanthone photo-initiation groups and branched chain bulk alkane groups. The resin has the characteristics that: (1) energy migration and intermolecular reaction in a polymer chain are easier, and the self-initiation efficiency is high; (2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; (3) the system compatibility is excellent; (4) the resin has a high solid content, low viscosity, pigment bearing performance and storage stability; and (5) the defects caused by a small-molecule photo-initiator are overcome. The dendritic LED resin prepared by the invention has excellent flexibility, adhesive force, chemical resistance, heat resistance, aging resistance, oil resistance, wear resistance, pollution resistance and impact strength, is odorless in coating, and is used for LED colored floor coating, LED wood coating, LED alloy coating, LED circuit board ink and LED plastic coating.

The invention discloses a high-color-purity red light up-conversion nanoparticle material and a preparation method thereof, and belongs to the technical field of luminescent materials. The high-color-purity red light up-conversion nanoparticle material has a chemical formula of LiErF4:Tm<3+>-coated LiYF4, LiErF4:Tm<3+>-coated LiYF4 is of a core-shell structure taking LiErF4:Tm<3+> as a core and LiYF4 as a shell, and the doping molar weight of Tm<3+> in LiErF4: Tm<3+> nanoparticles is 0.5-20%. According to the invention, Tm<3+> is doped in the red light up-conversion nanoparticles to reduce theloss of internal energy migration of the nanoparticles, the doping content of Tm<3+> is adjusted to adjust the red light up-conversion intensity, and an inert shell layer LiYF4 is synthesized on thesurfaces of the LiErF4:Tm<3+> nanoparticles to form a core-shell structure to reduce surface defects. And the purpose of high-color-purity red light emission of the up-conversion nanoparticles is achieved.

The invention discloses a multiband fluorescence loss method, a multicolor super-resolution imaging method and a device. Multiband fluorescence refers to up-conversion fluorescence emitted in the process of electrons reaching a Tm<3+> high energy level and then sequentially migrating energy to the Gd<3+> ions and shell activated ions X<3+> in the Yb<3+> / Tm<3+> sensitization and up-conversion process of an other activated ions-doped shell wrapping a NaGdF4:Yb<3+> / Tm<3+> core. The up-conversion fluorescence can be different by changing the activated ions by means of the same sensitization, up-conversion and energy migration process. The fluorescence loss process is the process of loss of electrons of the Tm<3+> high energy level and the loss of multiband fluorescence emitted during the transfer of the Tm<3+> high energy level from Gd<3+> to X<3+>, caused by the stimulated emission transition of intermediate energy level electrons to a low energy level in the up-conversion process by using the stimulated emission of laser with the wavelength nearby 810 nm between the Tm<3+> matching energy levels. Nano-particles of different activated ions are synthesized based on the fluorescence loss method, and multicolor super-resolution microscopy imaging is realized using the same pair of excitation light and hollow loss light. An optical system is greatly simplified, and the cost of the system is reduced.

The invention belongs to the technical field of luminescent materials, and in particular relates to a core-shell structure up-conversion nano material emitting red light and a preparation method thereof. The upconversion nanomaterials are based on NaHoF 4 It is the core layer, and it is coated with NaGdF in turn 4 : Tb shell, NaGdF 4 :Yb, Tm shell and NaYF 4 passivation layer, in turn utilizing Gd 3+ : 6 P 7 / 2 Energy transfer between energy levels, Tb 3+ : 5 D. 4 Energy transfer between energy levels and Tb 3+ : 5 D. 4 Energy level versus Ho 3+ : 5 S 2 / 5 f 4 The interfacial energy transfer of the energy level transfers the excitation energy from the second shell to the core and causes the Ho 3+ The cross-relaxation effect between ions ( 5 S 2 / 5 f 4 + 5 I 7 → 5 f 5 + 5 I 6 ), and finally get NaHoF 4 based up-conversion red emission. The preparation process of the up-conversion nanometer material is simple, the cycle is short, the equipment cost is low, the operation is simple, and it is suitable for mass production.

The invention relates to a mining stress study, in particular to a method for migrating and quantitating roadway surrounding rock strain energy under the action of excavation unloading, comprising: establishing a roadway excavation model by means of numerical simulation, simulating an excavation unloading process of field rock, monitoring mechanics and deformation of the surrounding rock under the action of excavation unloading, and providing data basis for constructing a roadway surrounding rock strain energy migration and quantitation scheme under the action of excavation unloading. The method for migrating and quantitating roadway surrounding rock strain energy under the action of excavation unloading provided herein experiences a successive process of 'high speed, low speed and high speed' based on energy migration speed, providing effective measures to prevent and treat roadway surrounding rock instability. It is possible to block energy migration in 'low speed' phase, energy gathering in the range is multiply released by taking certain measures, and it is possible to effectively solve the gathering problem of energy in a surrounding rock instable area, reduce occurrence of disasters and guarantee smooth progress of a project.

The invention belongs to the technical field of luminescent materials, and particularly relates to a terbium ion doped Ho < 3 + >-based up-conversion nano material for red light emission and a preparation method thereof. The up-conversion nano material takes NaHoF4 as a core layer, a NaYF4: Tb shell layer, a NaYbF4: Tb shell layer and a NaYF4 passivation layer are sequentially coated outside the core layer, excitation energy is transmitted to the core layer from a second shell layer by sequentially utilizing energy migration between Tb < 3 + >: 5D4 energy levels and interface energy transmission of the Tb < 3 + >: 5D4 energy levels to Ho < 3 + >: 5S2 / 5F4 energy levels, a cross relaxation effect (5S2 / 5F4 + 5I7-5F5 + 5I6) between Ho < 3 + > ions is caused, and finally Ho < 3 + >-based up-conversion red light emission is obtained. The up-conversion nano material is simple in preparation process, low in equipment cost, easy to operate, short in preparation period and suitable for mass production.

The invention discloses a passive lower limb exoskeleton device for achieving human body energy migration. The passive lower limb exoskeleton device comprises a sole pressure sensor assembly arrangedon an insole, a lower limb connecting assembly is arranged at the back end of the insole, a plurality of control switch assemblies in signal connection with the sole pressure sensor assembly are hinged to the back side of the lower limb connecting assembly, and a bionic spring assembly is in sliding connection to each control switch assembly and is matched with the control switch assembly in a clamped manner to achieve limitation; and sole pressure sensors are used for collecting signals, the signals are used for controlling switches, then the stretching / contracting states of the bionic springassemblies are controlled, energy generated when the knee joint does negative work in the human body walking process is converted into elastic potential energy to be collected and stored, and the energy is transferred to the ankle joint in the standing phase later period, and energy dissipation of muscle during positive work doing of the ankle joint is reduced. By means of the passive lower limbexoskeleton device, external connection energy resources are avoided, the structure is simple, the mass is small, and wearing is convenient.

The invention discloses high-transparency microcrystalline glass containing scintillation nanocrystals and a preparation method thereof. The microcrystalline glass contains a microcrystalline phase KLa1-xGdxF4: Ce < 3 + >, x is equal to 0-1, and active ions are Ce < 3 + >. The microcrystalline glass is prepared through a traditional glass preparation method and a heat treatment mode. The Gd ions partially replace La in KLaF4 successfully in the heat treatment process, KLa1-xGdxF4: Ce < 3 + > crystals are separated out, the density of the microcrystalline glass is increased, and the Gd ions can serve as sensitizers in the crystals to improve the energy migration efficiency among the ions. The light output capacity of the prepared microcrystalline glass is remarkably improved, and the luminous intensity of fluorescence under X-ray excitation is obviously higher than that of commercial scintillation crystal BGO.

The invention belongs to the technical field of luminescent materials, in particular to a terbium ion-doped Ho 3+ Upconversion nanomaterials and preparation methods thereof. The upconversion nanomaterials are based on NaHoF 4 It is the core layer, and it is coated with NaYF in turn 4 : Tb shell, NaYbF 4 :Tb shell and NaYF 4 passivation layer, in turn utilizing Tb 3+ : 5 D. 4 Energy transfer between energy levels and Tb 3+ : 5 D. 4 Energy level versus Ho 3+ : 5 S 2 / 5 f 4 The interfacial energy transfer of the energy level transfers the excitation energy from the second shell to the core and causes the Ho 3+ The cross-relaxation effect between ions ( 5 S 2 / 5 f 4 + 5 I 7 → 5 f 5 + 5 I 6 ), and finally get Ho 3+ Based on up-converted red emission. The up-conversion nanometer material has simple preparation process, low equipment cost, easy operation and short preparation period, and is suitable for mass production.

The invention relates to thioxanthone polyurethane modified epoxy acrylate LED light-cured resin and a preparation method thereof. The LED light-cured resin contains three active groups and a thioxanthone photo-initiation group and has the following characteristics that 1) energy migration and intermolecular reaction in a polymer chain are easier; under the irradiation of a UV-LED lamp, high self-initiation activity is realized; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; and 4) the defects caused by a small-molecule photoinitiator are overcome. The thioxanthone LED light-cured resin prepared by the invention has excellent adhesive force, water resistance, aging resistance, chemical resistance and coating odor removal property, also has the characteristics of high gloss, high wear resistance, high fullness, strong impact resistance, good flexibility and the like, and is widely applied to UV floor coatings, UV wood coatings, UV alloy coatings, UV circuit board ink, UV plastic coatings and the like.

The invention belongs to the technical field of luminescent materials, and particularly relates to a red-light-emitting core-shell structure up-conversion nano material and a preparation method thereof. According to the up-conversion nano material, NaHoF4 serves as a core layer, and is sequentially coated with a NaGdF4:Tb shell layer, a NaGdF4:Yb,Tm shell layer and a NaYF4 passivation layer, excitation energy is transmitted to the core layer from the second shell layer by sequentially utilizing energy migration between Gd<3+>:<6>P7 / 2 energy levels, energy migration between Tb<3+>:<5>D4 energy levels and interface energy transmission of Tb<3+>:<5>D4 energy levels to Ho<3+>:<5>S2 / <5>F4 energy levels, and a cross relaxation effect (<5>S2 / <5>F4+<5>I7-><5>F5+<5>I6) between Ho<3+> ions is caused so as to finally obtain NaHoF4-base up-conversion red light emission. The up-conversion nano material is simple in preparation process, short in period, low in equipment cost, simple to operate and suitable for mass production.