Patents by Inventor Yanfeng Jiang
Yanfeng Jiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240112855Abstract: The disclosure is directed to an iron-nitride material having a polycrystalline microstructure including a plurality of elongated crystallographic grains with grain boundaries, the iron-nitride material including at least one of an ??-Fe16N2 phase and a body-center-tetragonal (bct) phase comprising Fe and N. The disclosure is also directed a method producing an iron-nitride material.Type: ApplicationFiled: December 5, 2023Publication date: April 4, 2024Inventors: Jian-Ping WANG, Md MEHEDI, YanFeng JIANG, Bin MA, Delin ZHANG, Fan ZHANG, Jinming LIU
-
Publication number: 20240096491Abstract: A computer readable storage medium is provided. When contents of the computer readable storage medium are executed by a processor, multi-photon imaging may be performed on a histopathological section containing tumor environment information, and pathological partitioning of a tumor microenvironment may be further performed through image processing. A value of each collagen feature parameters, such as a morphological feature parameter, an energy feature parameter and a texture feature parameter, may be extracted from a tumor tissue region, an invasive margin (IM) region and a normal tissue (N) region. An inter-region difference and a variation may be calculated according to feature parameters of regions. A collagen feature scoring model may be established. A collagen feature score may be calculated with the collagen feature parameters input to the model.Type: ApplicationFiled: November 15, 2022Publication date: March 21, 2024Inventors: Jun YAN, Shumin DONG, Botao YAN, Weisheng CHEN, Xiaoyu DONG, Xiumin LIU, Shuhan ZHAO, Jiaxin CHENG, Yanfeng DONG, Wei JIANG, Dexin CHEN, Guoxin LI
-
Publication number: 20240076764Abstract: All example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average wain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including au iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 ma. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.Type: ApplicationFiled: November 10, 2023Publication date: March 7, 2024Inventors: Jian-Ping WANG, YanFeng JIANG, Md MEHEDI, Yiming WU, Bin MA, Jinming LIU, Delin ZHANG
-
Patent number: 11920660Abstract: A screw pair including inner walls of screw holes in a working nut and a pre-tightening nut with sensor groups including a plurality of displacement sensors capable of measuring a value of a gap between an inner and outer wall of a screw in a diameter direction of the screw hole, the group includes four displacement sensors evenly distributed in a circumferential direction of the screw hole, every two displacement sensors are paired and symmetrical about a center axis, and projections of a plurality of sensor groups in an axial direction overlap the screw; and an adaptive excitation coil is mounted to each displacement sensor, which is capable of attracting the screw in a measurement direction of the adaptive displacement sensor, and a magnetic force of the coil attached is adjustable to change the value of the gap, so that axes of the screw, working nut, and pre-tightening nut coincide.Type: GrantFiled: May 12, 2021Date of Patent: March 5, 2024Assignee: SHANDONG UNIVERSITYInventors: Mingxing Lin, Jiajia Zhao, Yanfeng Zhao, Xianchun Song, Hongkui Jiang
-
Publication number: 20240055165Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.Type: ApplicationFiled: October 26, 2023Publication date: February 15, 2024Inventors: Jian-Ping WANG, Bin MA, Jinming LIU, Yiming WU, YanFeng JIANG
-
Patent number: 11875934Abstract: The disclosure is directed to an iron-nitride material having a polycrystalline microstructure including a plurality of elongated crystallographic grains with grain boundaries, the iron-nitride material including at least one of an ??-Fe16N2 phase and a body-center-tetragonal (bct) phase comprising Fe and N. The disclosure is also directed a method producing an iron-nitride material.Type: GrantFiled: May 28, 2019Date of Patent: January 16, 2024Assignee: Regents of the University of MinnesotaInventors: Jian-Ping Wang, Md Mehedi, YanFeng Jiang, Bin Ma, Delin Zhang, Fan Zhang, Jinming Liu
-
Patent number: 11859271Abstract: An example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average grain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including an iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 nm. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.Type: GrantFiled: May 4, 2018Date of Patent: January 2, 2024Assignee: Regents of the University of MinnesotaInventors: Jian-Ping Wang, YanFeng Jiang, Md Mehedi, Yiming Wu, Bin Ma, Jinming Liu, Delin Zhang
-
Patent number: 11837393Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.Type: GrantFiled: September 30, 2021Date of Patent: December 5, 2023Assignee: Regents of the University of MinnesotaInventors: Jian-Ping Wang, Bin Ma, Jinming Liu, Yiming Wu, YanFeng Jiang
-
Publication number: 20230352219Abstract: A permanent magnet may include a Fe16N2 phase constitution. In some examples, the permanent magnet may be formed by a technique that includes straining an iron wire or sheet comprising at least one iron crystal in a direction substantially parallel to a <001> crystal axis of the iron crystal; nitridizing the iron wire or sheet to form a nitridized iron wire or sheet; annealing the nitridized iron wire or sheet to form a Fe16N2 phase constitution in at least a portion of the nitridized iron wire or sheet; and pressing the nitridized iron wires and sheets to form bulk permanent magnet.Type: ApplicationFiled: July 7, 2023Publication date: November 2, 2023Inventors: Jian-Ping Wang, Shihai He, Yanfeng Jiang
-
Patent number: 11742117Abstract: A permanent magnet may include a Fe16N2 phase constitution. In some examples, the permanent magnet may be formed by a technique that includes straining an iron wire or sheet comprising at least one iron crystal in a direction substantially parallel to a <001> crystal axis of the iron crystal; nitridizing the iron wire or sheet to form a nitridized iron wire or sheet; annealing the nitridized iron wire or sheet to form a Fe16N2 phase constitution in at least a portion of the nitridized iron wire or sheet; and pressing the nitridized iron wires and sheets to form bulk permanent magnet.Type: GrantFiled: June 8, 2018Date of Patent: August 29, 2023Assignee: Regents of the University of MinnesotaInventors: Jian-Ping Wang, Shihai He, Yanfeng Jiang
-
Patent number: 11581113Abstract: A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.Type: GrantFiled: December 7, 2021Date of Patent: February 14, 2023Assignee: Regents of the University of MinnesotaInventors: Jian-Ping Wang, YanFeng Jiang
-
Publication number: 20230024845Abstract: Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one ??-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one ??-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.Type: ApplicationFiled: September 15, 2022Publication date: January 26, 2023Inventors: Jian-Ping WANG, YanFeng JIANG
-
Publication number: 20230006418Abstract: A depth obtaining component includes a laser driver array and a laser array. The laser array includes a plurality of lasers. The laser driver array includes one or more control units, and each control unit is configured to control selection of one or more lasers in the laser array. The one or more control units are disposed in a charge loop of the laser driver array. A laser corresponding to the control unit can be flexibly selected based on a first switch module and a capacitive module in the control unit. In this way, scanning laser emission of the laser array can be implemented based on the laser drive circuit, no scanning device such as a micro electro mechanical systems mirror needs to be additionally disposed, and circuit support can be provided for implementing a small-sized, power-efficient, and cost-effective optical transmit end.Type: ApplicationFiled: August 31, 2022Publication date: January 5, 2023Inventors: Liqiang YU, Zhenwei CUI, Wei CHEN, Yanfeng JIANG, Junzhe LIU
-
Patent number: 11511344Abstract: Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one ??-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one ??-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.Type: GrantFiled: January 8, 2020Date of Patent: November 29, 2022Assignee: REGENTS OF THE UNIVERSITY OF MINNESOTAInventors: Jian-Ping Wang, YanFeng Jiang
-
Method for preparing soft magnetic material by using liquid nitrogen through high-speed ball milling
Patent number: 11504767Abstract: The disclosure discloses a method for preparing a ??-Fe4N soft magnetic material by using liquid nitrogen through high-speed ball milling, and belongs to the field of the soft magnetic material. According to the method of the disclosure, high energy in the liquid nitrogen is used for obtaining a nanometer material FexN with a nitrogen atom supersaturation degree through cryogrinding. At a low temperature, the material is very brittle, and a surface volume ratio is very high, so that a content of nitrogen atoms adsorbed on a surface of a sample is as high as 22%. Through 300° C. post-annealing, ??-Fe4N is directly obtained from ?-Fe through phase change, so that a nanometer crystal ??-Fe4N soft magnetic material is prepared.Type: GrantFiled: May 22, 2020Date of Patent: November 22, 2022Assignee: JIANGNAN UNIVERSITYInventors: Yanfeng Jiang, Ru Li, Linxin Jiang -
Patent number: 11302472Abstract: Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one ironbased phase domain including uniaxial magnetic anisotropy, wherein the applied magnetic field has a strength of at least about 0.01 Tesla (T). Also disclosed are workpieces made by such methods, apparatus for making such workpieces and bulk materials made by such methods.Type: GrantFiled: July 22, 2015Date of Patent: April 12, 2022Assignee: REGENTS OF THE UNIVERSITY OF MINNESOTAInventors: Jian-Ping Wang, Yanfeng Jiang
-
Publication number: 20220098711Abstract: An example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average grain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including an iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 nm. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.Type: ApplicationFiled: May 4, 2018Publication date: March 31, 2022Inventors: Jian-Ping WANG, YanFeng JIANG, Md MEHEDI, Yiming WU, Bin MA, Jinming LIU, Delin ZHANG
-
Publication number: 20220093296Abstract: A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.Type: ApplicationFiled: December 7, 2021Publication date: March 24, 2022Inventors: Jian-Ping WANG, YanFeng JIANG
-
Publication number: 20220080500Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.Type: ApplicationFiled: September 30, 2021Publication date: March 17, 2022Inventors: Jian-Ping WANG, Bin MA, Jinming LIU, Yiming WU, YanFeng JIANG
-
Publication number: 20220051835Abstract: The disclosure describes techniques for forming nanoparticles including Fe16N2 phase. In some examples, the nanoparticles may be formed by first forming nanoparticles including iron, nitrogen, and at least one of carbon or boron. The carbon or boron may be incorporated into the nanoparticles such that the iron, nitrogen, and at least one of carbon or boron are mixed. Alternatively, the at least one of carbon or boron may be coated on a surface of a nanoparticle including iron and nitrogen. The nanoparticle including iron, nitrogen, and at least one of carbon or boron then may be annealed to form at least one phase domain including at least one of Fe16N2, Fe16(NB)2, Fe16(NC)2, or Fe16(NCB)2.Type: ApplicationFiled: October 28, 2021Publication date: February 17, 2022Inventors: Jian-Ping Wang, Yanfeng Jiang, Craig A. Bridges, Michael P. Brady, Orlando Rios, Roberta A. Meisner, Lawrence F. Allard, JR., Edgar Lara-Curzio, Shihai He