A device (110) for performing measurements on a seabed (3), comprises a chamber (111) containing a sensor (120) and a fluid (115) at a constant temperature and at an ambient pressure. This removes the need for calibration in large ranges of both pressure and temperature. In addition, this eliminates the need to wait until the sensor (120) has achieved ambient temperature, and thereby achieves a desired accuracy of the recordings from the sensor while decreasing the operation time. The device preferably comprises an insulating layer (113), an internal temperature stabilising device (130) and a circulating device (131) to ensure a constant temperature and low temperature gradients within the chamber (111). The pressure within chamber (111) may be equalised to ambient pressure by a pressure inlet (112).

The present application relates sensing reactive components in fluids by monitoring band gap changes to a material having interacted with the reactive components via physisorption and/or chemisorption. In some embodiments, the sensors of the present disclosure include the material as a reactive surface on a substrate. The band gap changes may be detected by measuring conductance changes and/or spectroscopic changes. In some instances, the sensing may occur downhole during one or more wellbore operations like drilling, hydraulic fracturing, and producing hydrocarbons.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.

Various implementations described herein may refer to a wellbore survey tool using Coriolis vibratory gyroscopic sensors. In one implementation, a method may include receiving one or more reference values corresponding to the Earth's rotation rate and one or more reference values corresponding to a local latitude of a survey tool disposed in a wellbore. The method may also include receiving rotation rate measurements from one or more quartz Coriolis vibratory gyroscopic (CVG) sensors of the survey tool. The method may further include determining bias-corrected rotation rate measurements using one or more statistical estimation processes and based on the one or more reference values corresponding to the Earth's rotation rate, the one or more reference values corresponding to the local latitude, and the rotation rate measurements. The method may additionally include determining azimuth values of the survey tool based on the bias-corrected rotation rate measurements.

Disclosed are method and apparatus for obtaining residual gravity anomaly. The method comprises obtaining Bouguer gravity anomaly of a target region, determining a first pre-set range corresponding to each sampling point in the target region, obtaining a first regional field value of each sampling point in the first pre-set range through a surface fitting method based on the coordinate and field value of the sampling point, traversing the target region to obtain first regional gravity anomaly of the target region according to the first regional field values of the sampling points in the target region, and obtaining first residual gravity anomaly of the target region according to the Bouguer gravity anomaly and the first regional gravity anomaly. The residual gravity anomaly thus obtained is more accurate, thus enabling an accurate prediction of an underground geological body.

Disclosed are method and apparatus for obtaining residual gravity anomaly. The method comprises obtaining Bouguer gravity anomaly of a target region, determining a first pre-set range corresponding to each sampling point in the target region, obtaining a first regional field value of each sampling point in the first pre-set range through a surface fitting method based on the coordinate and field value of the sampling point, traversing the target region to obtain first regional gravity anomaly of the target region according to the first regional field values of the sampling points in the target region, and obtaining first residual gravity anomaly of the target region according to the Bouguer gravity anomaly and the first regional gravity anomaly. The residual gravity anomaly thus obtained is more accurate, thus enabling an accurate prediction of an underground geological body.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.

Provided herein may be a storage device and a method of operating the same. A storage device for protecting the storage device from physical movement may include a nonvolatile memory device, a sensor unit configured to collect information about physical movement of the storage device, and a memory controller configured to perform a device lock operation of protecting data in the nonvolatile memory device, based on a sensor value acquired from the sensor unit.