Abstract: The disclosure discloses a device and a processing method for offsetting an attitude error of a semi-airborne electromagnetic system. The method includes following steps: adjusting attitude angles of the adjustable offset coil based on the changing attitude angle of the measuring coil; obtaining a magnetic induction intensity of offset coils based on the offset coil pairs after an attitude angle adjustment; performing a calculation based on the magnetic induction intensity of the offset coils to obtain attitude error data of the measuring coil; obtaining a magnetic induction intensity of the measuring coil with an attitude error offset based on the magnetic induction intensity and the attitude error data of the measuring coil.

Abstract: The present disclosure provides an inductive magnetic sensor, which includes a signal pre-amplifying measurement circuit, a feedback loop, a magnetic core and coil group, a low-noise autozero processing circuit, and an output protection module. The magnetic core and coil group is electrically connected between the signal pre-amplifying measurement circuit and the feedback loop, the signal pre-amplifying measurement circuit comprises the low-noise autozero processing circuit, and the feedback loop and the low-noise autozero processing circuit are electrically connected to the output protection module respectively. By introducing the resonant notch filter, it may extend the passband to the low frequency, and extend the low-frequency characteristic of the magnetic sensor, to obtain a better low-frequency magnetic sensor. The present disclosure further provides an electromagnetic prospecting equipment.

Abstract: A system and a method are disclosed for optimally ranking and indexing accommodation listing information based on a set of constraints corresponding to a travel activity goal input on a client device. In an embodiment, an accommodation management system receives a travel activity goal input by a guest user on a client device with a corresponding set of constraints. Based on the constraints, the accommodation management system determines a set of geographic coordinates corresponding to the travel activity, and further identifies the set of candidate accommodation listings with accommodations within a threshold distance from the geographic coordinates. The accommodation management system filters and ranks the candidate accommodation listings based on the constraints, and sends a recommendation to the guest user for display on the client device which includes one or more of the ranked accommodation listings.

Abstract: A method for treating wastewater or sludge comprises the steps of adding the wastewater or sludge to a reactor and mixing the wastewater or sludge with a stream to thereby decrease a ratio of alkalinity to ammonium in the reactor, the reactor containing ammonium oxidising bacteria that oxidise ammonium to produce nitrite and decrease pH.

Abstract: A system and a method are disclosed for matching users of an accommodation management system to an event and prompting the matched users to make an accommodation listing available during the event. In an embodiment, the accommodation management system detects an event occurring in a geographic region. Responsive to detecting the event, the accommodation management system identifies users registered in the geographic region that are exhibiting low hosting activity. The accommodation management system compares the event to accommodation listings on a wish list associated with each retrieved user. Responsive to a successful match between the event and a retrieved user's wish list, the accommodation management system outputs a prompt to the user recommending that the user make a listing for an accommodation available during the event.

Abstract: A system and a method are disclosed for prompting a user of an accommodation management system to host an accommodation during an event. In an embodiment, the accommodation management system detects an event occurring in a geographic region. The accommodation management system identifies a user in the geographic region and determines an estimated hosting value of the user hosting an accommodation during the event. Responsive to determining the estimated hosting value, the accommodation management system identifies an accommodation listing on a wish list associated with the user based on the estimated hosting value and a reservation criterion of the listing. The accommodation management system outputs a prompt to the user recommending that the user hosts an accommodation during the event based on the identified listing.

Abstract: A system and a method are disclosed for optimally ranking and indexing accommodation listing information based on a set of constraints corresponding to a travel activity goal input on a client device. In an embodiment, an accommodation management system receives a travel activity goal input by a guest user on a client device with a corresponding set of constraints. Based on the constraints, the accommodation management system determines a set of geographic coordinates corresponding to the travel activity, and further identifies the set of candidate accommodation listings with accommodations within a threshold distance from the geographic coordinates. The accommodation management system filters and ranks the candidate accommodation listings based on the constraints, and sends a recommendation to the guest user for display on the client device which includes one or more of the ranked accommodation listings.