Nanjing Zgmicro Company Limited

Nanjing University

Nanjing Agricultural University

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China

Bin Xu

Jian Li

Wei Zhuang

Yan Zhu

Yongchao Tian

Weixing Cao

Jun Ni

Weixin Li

Fei He

Zhuang Liu

Yufeng Xie

Xiaoping Jiang

Jianying Chao

Ying Zhang

Jinzhao Hu

Yaoyao Liao

Xingchen Wang

Yuanqing Wang

Iingli Zhan

Hanbei Du

Yalan Xue

A wireless audio transmitting method is provided in the present invention. The wireless audio transmitting method comprises: establishing a connected isochronous stream link based on a high-speed physical layer with an audio receiving device by an audio transmitting device, wherein a minimum data transmission rate of the high-speed physical layer is higher than a maximum data transmission rate of a BLE physical layer; and transmitting a first audio data to the audio receiving device through the connected isochronous stream link based on the high-speed physical layer by the audio transmitting device.

Low-latency wireless audio transmitting and receiving method and device

Techniques for constant envelope phase modulation and demodulation of a wireless signal such as BLE are described. The method comprises: dividing a binary data stream to be transmitted into a plurality of groups of binary data according to a predetermined phase modulation mode, each group of binary data comprising a plurality of bits; mapping the binary data stream into a plurality of phase symbols, wherein each group of binary data is mapped into one phase symbol; modulating a phase sequence composed of the phase symbols into a phase signal using a phase waveform obtained by integrating a predetermined pulse function; and converting the phase signal into two baseband signals by means of a cosine function and a sine function respectively.

Method and transmitter for constant envelope phase modulation and demodulation

Disclosed is a design method for a three-dimensional special-shaped jet nozzle used in the field of water-saving irrigation in farmland. According to a method based on a gas-liquid two-phase flow theory and computational fluid dynamics (CFD), a fan-shaped jet mode and a beam-shaped jet mode are coupled according to a certain area ratio and velocity ratio, which enables a cylindrical-conical coupling structure to be presented all the way from an inlet to an outlet of the nozzle, and a jet orifice is optimally designed into a three-dimensional special-shaped slotted structure; along a flowing direction of the jet orifice, V-shaped slots are formed in bottom and front portions of a midperpendicular plane, where a fan-shaped jet capable of forming a near-range water body prevails, and a strip-shaped slot is formed in an upper half portion of the midperpendicular plane, where a beam-shaped jet capable of forming a far-range water body prevails; and the V-shaped slots and the strip-shaped slot promote the formation of a narrow-band range S in a synergistic manner due to smooth joint transition therebetween. The present disclosure is particularly suitable for farmland sprinkling irrigation operations in non-planted areas such as tractor roads and field roads, and has the unique advantages of saving water and energy, and not rolling soil and crop seedlings.

Method for three-dimensional special-shaped jet nozzle used in field of water-saving irrigation in farmland

The present invention provides a phase shift keying modulation method and a corresponding modulator, a phase shift keying demodulation method and a corresponding demodulator. The phase shift keying modulation method comprises: mapping a binary data stream to be modulated into a phase sequence comprising one or more phase symbols according to a predetermined phase shift keying modulation mode; modulating the phase symbol with a preset phase function to obtain a phase signal that changes continuously with time, wherein in each symbol cycle, a difference between a value of the phase signal at a beginning of the symbol cycle and a value of the phase signal at an end of the symbol cycle is equal to the phase symbol modulated in the symbol cycle; and obtaining a radio frequency signal by modulation based on the phase signal.

Phase shift keying modulation and demodulation methods and devices

An audio forwarding method, an audio forwarding method device and a storage medium are described. The audio forwarding method comprises: establishing a first communication link with a sound source device based on a first wireless communication protocol; establishing a second communication link with an audio playback device based on a second wireless communication protocol; receiving first audio data from the sound source device through the first communication link; processing the first audio data to generate second audio data, and storing the second audio data into a second buffer; and transmitting the second audio data to the audio playback device through the second communication link. The second audio data in the second buffer is acquired according to a predetermined encoding frame length, a current frame is processed as an empty data frame if the second audio data in the second buffer is not successfully acquired, and an audio data packet containing the empty data frame is transmitted or not transmitted to the audio playback device through the second communication link within a current transmission time.

Audio forwarding method, device and storage medium

A risk prediction and early warning method for water environments based on a water environment model predicting pollution discharge information for all pollution sources in a watershed, and including: selecting pollution sources requiring environmental risk prediction and early warning and dividing these into different risk prediction/early warning levels; determining from official environmental monitoring data and literature research initial elements for environmental pollution risk evaluation; obtaining principal pollution elements affecting pollution events; generating a plurality of environmental risk prediction and early warning models; forming a comprehensive fuzzy risk prediction and early warning model by combining the several risk prediction and early warning models having the best selective performance; inputting principal pollution element values into the comprehensive fuzzy risk prediction and early warning model, and predicting risk values for pollution events at pollution sources. The present method realizes prediction of watershed pollution risk, and resolves present deficiencies in watershed pollution risk prediction and early warning, while improving coverage rates for watershed pollution risk prediction and enhancing the accuracy thereof.

Water environment risk prediction and early warning method

An unassisted stereoscopic display device using a directional backlight structure to produce a stereographic display effect. According to a time-division principle, the display device alternately displays left and right images viewed by the left and right eyes of a viewer. A video field synchronization time sequence is used to control an on-off time sequence of light-emitting units of the directional backlight structure, and when the left image is displayed, only the light-emitting unit corresponding to the left eye of the viewer is lightened, and when the right image is displayed, only the light-emitting unit corresponding to the right eye of the viewer is lightened, such that the left eye of the viewer can only view the left image and the right eye thereof can only view the right image. Binocular parallax images are fused to form a stereoscopic image without a loss of resolution.

Unassisted stereoscopic display device using directional backlight structure

Growing community of inventors

Nanjing, China

Bin Xu