Abstract: A dual-purpose household water purifier includes a main unit and an expansion unit which can be detachably connected. When the main unit is connected with the expansion unit, a booster pump can pressurize tap water entering a filter assembly. In the dual-purpose household water purifier, the main unit can be used as a non-electric drive water purifier. After the tap water enters the filter assembly and is filtered. The purified water flows into the purified water chamber of the pressure bucket, and the user takes the purified water. It is further provided an expansion unit. When the main unit is connected to the expansion unit, the booster pump can pressurize the pipeline, reducing application environmental restrictions on the water purifier. Through arrangement of the expansion unit, the water purifier can be operated in two operation modes of non-electric drive mode and electric drive mode.

Abstract: An apparatus of salt cavern gas storage without cushion gas includes: a salt cavern; sediments; a drainage assembly; a gas injection and production pipe; a debrining string, one end of which is connected to the drainage assembly, and the other end of which protrudes from the ground to be connected to a water source assembly; a communicating assembly, which is used to make the gas injection and production pipe be in communication with the debrining string on the ground. A closed loop is formed by making the gas injection and production pipe and the debrining string be in communication with each other on the ground through the communicating assembly, thus the non-cushion gas injection-production operation of sediment particles in the salt cavern is realized.

Abstract: The present disclosure discloses a grounding wire detection circuit, for monitoring whether an electrical device is grounded in real time, the grounding wire detection circuit including: a grounding detection circuit and a sampling control circuit, wherein the grounding detection circuit is electrically connected to a live wire, a neutral wire and a grounding wire of a single-phase three-wire type input, the live wire and the neutral wire are electrically connected to a main circuit of the electrical device; and the sampling control circuit is configured to isolate a current detected by the grounding detection circuit and convert the current into a sampling voltage. The real-time monitoring of whether or not a device is grounded may be achieved by detecting the sampling voltage, so as to alarm, cut off electrical device accordingly, which can improve safety of using the electrical device.

Abstract: The present disclosure discloses a grounding wire detection circuit, for monitoring whether an electrical device is grounded in real time, the grounding wire detection circuit including: a grounding detection circuit and a sampling control circuit, wherein the grounding detection circuit is electrically connected to a live wire, a neutral wire and a grounding wire of a single-phase three-wire type input, the live wire and the neutral wire are electrically connected to a main circuit of the electrical device; and the sampling control circuit is configured to isolate a current detected by the grounding detection circuit and convert the current into a sampling voltage. The real-time monitoring of whether or not a device is grounded may be achieved by detecting the sampling voltage, so as to alarm, cut off electrical device accordingly, which can improve safety of using the electrical device.

Abstract: A system and a method for classifying text messages, such as social media messages into sentiment valence categories are provided. The system comprising a module for decomposing text messages, a module for cleaning text messages, a module for producing feature data of text messages, and a module for classifying text messages into sentiment valence categories. The module for decomposing text messages is configured to: receive a text message, parse the text message into separate portions in response to parsing criteria based on sentence delimiters, wherein the separate portions are sentences, phrases and words, and rejoin at least some of the separate portions of the text message into sentences in response to predefined linguistic conditions.

Abstract: There is provided a computer system for negotiating a sale. A computer system comprises a processor adapted to execute stored instructions and a memory device that stores instructions for execution by the processor. The memory device comprises computer-implemented code adapted to make an offer to sell in a round of a negotiation. The memory device also comprises computer-implemented code adapted to receive a counter-offer. The memory device additionally comprises computer-implemented code adapted to determine whether to accept the counter-offer based on a pre-determined target, a best alternative to a negotiated agreement (BATNA), and the round of the negotiation.