39results about How to "Short capture time" patented technology

Coated Ferromagnetic Density Particles or Density Particles with binding agents bound thereto capable of binding biological molecules and methods of use and apparatus for means are disclosed. Coated particles coupled to specific binding agents can be used for molecular biology and proteomic applications in research and diagnostics.

Techniques for tracking residual frequency error and phase noise in OFDM systems are provided. At the receiver, each received OFDM symbol is transformed using an FFT to obtain a received modulation symbol, which is serialized. A phase locked loop operates on the serialized receive modulation symbols and provides an independent phase correction value for each receive modulation symbol. Each received modulation symbol is corrected with its own phase correction value to obtain a phase corrected symbol. The phase error in each phase correction symbol is detected to obtain a phase error estimate for that phase correction symbol. The phase error estimate for each phase correction symbol is filtered (eg, with a second order loop filter) to obtain a frequency error estimate, which is accumulated to obtain a phase correction value for another received modulation symbol. Since independent phase correction values ​​are used for the received modulation symbols, the phase correction symbols are not correlated.

The invention discloses a pseudo code capturing method and device, and belongs to the technical field of communication. The pseudo code capturing method comprises the steps of receiving a signal sentby a transmitting end to obtain a received signal; performing convolution operation by adopting a local pseudo code sequence and the received signal so as to obtain a first correlation signal, whereinthe local pseudo code sequence is the pseudo code sequence same as the pseudo code sequence in an auxiliary field; multiplying the first correlation signal with a delayed conjugation signal to obtainintercorrelation signal, and the delayed conjugation signal is a conjugation signal of delay signal of the first correlation signal which delays for 4*M sampling points; performing convolution operation on the intercorrelation signal and a set sequence to obtain a second correlation signal, wherein the set sequence comprises M-1 bits with the value as 1, and 4*N-1 bits with the value as zero exist between each two adjacent bits with the value as 1; performing differencing processing on the second correlation signal and the delay signal of the second correlation signal which delays for 4*N*(M-1)/2 sampling points to obtain an external correlation signal; and determining a start position of the auxiliary field based on the external correlation signal so as to accordingly realize pseudo codecapturing.

The invention discloses a micro-fluidic chip for separating and enriching exosomes and a manufacturing method of the micro-fluidic chip. A soluble material is ground to a micron level, the soluble material is added into a plastic material as a pore-forming agent and then smeared at a wide channel of a micro-channel, and a three-dimensional porous area is obtained by washing off the pore-forming agent. The three-dimensional porous area has a unique three-dimensional porous structure, so that the capture efficiency of the separated and enriched exosomes is improved, the capture time of the required exosomes is short, the consumption of a sample reagent is small, and the manufacturing cost is low. The high-quality exosomes can be rapidly separated from serum and cell supernate, the manufacturing cost and the manufacturing time are greatly reduced, batch preparation can be achieved, miniaturization is achieved, and the method is suitable for clinically separating and enriching the exosomes on a large scale.

The invention provides a carbon dioxide trapping agent and a preparation method thereof, and relates to the technical field of energy conservation and emission reduction. The carbon dioxide trapping agent comprises the following raw materials: calcium orthosilicate and an alkali metal carbonate, wherein the molar quantity of the alkali metal carbonate accounts for 60% or more of the total molar quantity of the calcium orthosilicate and the alkali metal carbonate. The method has the advantages that the carbon dioxide trapping agent is wide in raw material source, low in preparation cost, low intrapping temperature and capable of achieving rapid regeneration, and no pollutant is generated in the whole process.

The invention discloses a police clamped steel fork, comprising a supporting part and a clamping part, wherein the supporting part comprises a steel pipe and a front end supporting rack, and the clamping part comprises a handle, a push rod, a connecting rod and a steel fork. The police clamped steel fork is simple in structure, the steel fork can be tightened through the action of the connecting rod only by pushing the handle, and a criminal can be independently arrested by policemen only by forking the neck of the criminal or vital part of the criminal for tightening, so that the arresting time is short, the needed personnel are few, the operation is convenient, the tightening force is large, the criminal can be easily subdued, and personal safety of the masses is effectively guaranteed.

The invention discloses an efficient multi-system adaptive capturing and tracking device for a satellite receiver. The device comprises a coarse capturing module, a fine capturing module and a carrier, code and data tracking module; an antenna at the receiving end receives a signal, the signal is subjected to down-conversion and then enters a baseband processing part, and at the moment, the coarsecapturing module is used for executing a coarse capture process S11; the fine capturing module is used for executing a fine capturing process S12; and the carrier, code and data tracking module is used for executing a carrier, code and data tracking process S2 and the like. The device is high in compatibility, the same set of capturing and tracking system is suitable for various communication systems, seamless switching can be achieved among various coexisting communication mechanisms, and the communication real-time performance is higher; the size, the weight and the size are lower, the device is suitable for miniaturized and light satellite-borne application, the capture time is short, the tracking efficiency is high, and the frequency tracking error is small.

The embodiment of the invention provides a full-automatic satellite station tracking method and device and a storage medium, and the method comprises the steps: 1, determining a front-end satellite signal reference value, and determining a search region; 2, Z-shaped scanning is carried out on the search area according to the mode of upper right and lower left, a front-end satellite signal reference value is read in the scanning process, and the front-end satellite signal reference value comprises one of a satellite signal power value and a satellite signal to noise ratio; and step 3, storing and comparing the read front-end satellite signal reference value, determining the position of the maximum value, judging the current modulation and demodulation state, determining whether the current signal is valid or not, entering a tracking mode if the current signal is valid, and finally locking the satellite, otherwise, continuing scanning and repeating the step 2. The problem that tracking is difficult due to the fact that no reference signal exists or satellite reference signals are weak and the satellite beacon frequency band is large is solved.

The invention provides a frequency capturing method suitable for a continuous phase modulation signal, which comprises the following steps of: S1, performing integral speed reduction on a received signal, and then performing segmented windowing processing and segmented FFT (Fast Fourier Transform) operation to obtain a frequency domain signal; s2, carrying out incoherent accumulation on the frequency domain signals, and then carrying out spectrum matching shift accumulation according to the signal spectrum bandwidth to obtain a matching cyclic accumulation spectrum; s3, detecting the peak value of the matching cyclic accumulation spectrum, and calculating a Doppler frequency deviation value; and S4, repeating the steps S1 to S3 to obtain a plurality of groups of Doppler frequency deviation values, and calculating an average value as a frequency capture value.