High-speed omnidirectional underwater propulsion mechanism

    公开(公告)号:US12065227B2

    公开(公告)日:2024-08-20

    申请号:US17531007

    申请日:2021-11-19

    IPC分类号: B63H1/26 B63B39/00 B63H21/21

    摘要: Various examples of a high-speed omnidirectional fully-actuated underwater propulsion mechanism are described. In one example, a propulsion system includes two decoupled counter-rotating rotors centered on a main axis, with each rotor comprising a plurality of pivotable blades projecting radially from the main axis, a servo-swashplate actuation mechanism comprising a plurality of servos and a linkage assembly connected from the servos to the pivotable blades, a blade-axis re-enforcing flap adapter comprising a plurality of stationary flaps, with the blade-axis re-enforcing flap adapter being positioned in a region between the two decoupled counter-rotating rotors centered on the main axis, and a controller. The controller can be configured to calculate control parameters, compensate a first control parameter among the control parameters to reduce cross-coupling of an unwanted force generated by drag forces on the two decoupled counter-rotating rotors, and generate a control signal for each of the servos based on the control parameters.

    ENGINEERED S. TYPHIMURIUM AND USES THEREOF
    5.
    发明公开

    公开(公告)号:US20240252553A1

    公开(公告)日:2024-08-01

    申请号:US18578856

    申请日:2022-07-12

    摘要: Cancer is a significant cause of mortality and morbidity worldwide. One of the principal impediments to the broad success of conventional chemotherapy is poor delivery to and transport within the tumor microenvironment (TME), caused by irregular and leaky vasculature, the lack of functional lymphatics, and underscored by the overproduction of extracellular matrix (ECM) proteins such as collagen. Described herein are engineered Salmonella Typhimurium (S. Typhimurium) bacteria and uses thereof. In some embodiments, the engineered S. Typhimurium bacteria comprises an exogenous collagenase. Also described in exemplary embodiments herein methods of using the engineered S. Typhimurium bacteria, such as part of a,cancer therapy.

    SOLID-INFUSED SURFACES, ARTICLES INCORPORATING SOLID-INFUSED SURFACES, METHODS OF MAKING, AND METHODS OF USE THEREOF

    公开(公告)号:US20240240036A1

    公开(公告)日:2024-07-18

    申请号:US18559525

    申请日:2022-05-07

    IPC分类号: C09D5/16 C23F1/18

    CPC分类号: C09D5/1681 C23F1/18

    摘要: Solid-infused surfaces and articles having solid-infused surfaces are provided. The solid-infused surface includes (a) a substrate with a roughened surface having multi-scale surface roughness and a plurality of substrate asperities, and (b) a low surface-energy polymer coating a portion of the roughened surface forming the solid-infused surface having a fraction of the substrate asperities exposed on the solid-infused surface. The surfaces can be useful, in particular, for promoting condensation heat transfer performance. The articles and surfaces can include electronic components, optical components, or even pipes and other conduits for transporting certain fluids. Methods of making and methods of using the solid-infused surfaces are also provided.

    TRANSIENT CONTROL SCHEME FOR MULTIPHASE POWER CONVERTERS

    公开(公告)号:US20240204652A1

    公开(公告)日:2024-06-20

    申请号:US18068144

    申请日:2022-12-19

    IPC分类号: H02M1/14 H02M3/158

    CPC分类号: H02M1/14 H02M3/1584

    摘要: Aspects of a transient control scheme for a multiphase power converter are described. In one example, a power converter system includes a multiphase power converter that includes a plurality of converter phases, with each converter phase comprising a switching transistor and an inductor coupled between an input power source and a load. The power converter system also includes a controller configured to distribute an on-time signal to each converter phase during operation of the multiphase power converter. The controller includes circuitry configured to enable an on-time signal phase overlap between non-subsequent phases of the multiphase power converter when a load current increase is detected during a transient state of the multiphase power converter. The on-time signal phase overlap refers to a simultaneous on-state of two or more switching transistors of the non-subsequent phases during a duration of time within the transient state.

    Wideband end-fed coaxial collinear antenna

    公开(公告)号:US12015215B2

    公开(公告)日:2024-06-18

    申请号:US17607513

    申请日:2020-07-08

    CPC分类号: H01Q9/28 H01Q1/36 H01Q21/10

    摘要: Coaxial collinear antenna examples are described. An example coaxial collinear antenna includes a first segment and a second segment of a coaxial cable. The second segment includes a second inner conductor and a second outer conductor. The first inner conductor of the first segment is coupled to the second outer conductor of the second segment. The first outer conductor of the first segment is coupled to the second inner conductor of the second segment. Further, a first wire mesh is attached to the first outer conductor of the first segment, and a second wire mesh is attached to the second outer conductor of the second segment. Additionally, the coaxial collinear antenna includes an end-fed port that is situated at a distal end of the coaxial collinear antenna.