42results about How to "Low detection efficiency" patented technology

An apparatus for intravascular imaging to detect and characterize early stage, unstable coronary arty plaques. The detector works by identifying and localizing plaque-binding beta-emitting radiopharmaceuticals.

An apparatus for intravascular imaging to detect and characterize early stage, unstable coronary arty plaques. The detector works by identifying and localizing plaque-binding beta-emitting radiopharmaceuticals.

A method and apparatus for detecting a multimedia content change, and a resource propagation system. The method comprises: when importing a resource address of multimedia content, acquiring original feature information of the multimedia content; receiving first feature information of the multimedia content from a client; determining, according to the first feature information and corresponding original feature information of the multimedia content, whether the resource address of the multimedia content is abnormal; and detecting whether multimedia content at an abnormal resource address is changed. It is firstly determined whether a resource address corresponding to multimedia content is abnormal, and if the resource address is abnormal, then it is determined whether the multimedia content corresponding to the resource address is changed, thereby preventing repeated checking of a large number of normal resource addresses, improving the detection efficiency, and reducing the detection cost.

Embodiments of the present invention provide a method and an apparatus for word detection in an application program. The method includes extracting a resource file from a multilingual application program installation package and converting the resource file into a text file. The method further includes disassembling the text file according to a language version to acquire a corresponding language text file; invoking a language detection tool according to the language version; and checking the language text file by using the language detection tool to identify questionable character information. The apparatus for word detection includes a file processing module, configured to extract a resource file from a multilingual application program installation package, and convert the resource file into a text file; and a disassembling module, configured to disassemble the text file according to a language version to acquire a corresponding language text file. The apparatus further includes a tool invoking module, configured to invoke a language detection tool according to the language version; and a text detection module, configured to check the language text file by using the language detection tool to identify questionable character information. Word detection efficiency in an application program can be improved by adopting the present disclosure.

The invention discloses a p-GaN / i-GaN / n-BN neutron detector. The neutron detector is composed of an Al2O3 substrate layer, an n-BN layer, an i-GaN layer and a p-GaN layer. The preparation method is as follows: on an Al2O3 substrate with a certain thickness, firstly grow n-BN by using metal organic chemical vapor deposition technology, then grow undoped i-GaN, and finally grow p-GaN, and then use inductively coupled plasma etching. The n-BN is etched out, and finally ohmic contact metal electrodes are evaporated on the n-BN and p-GaN layers by electron beam evaporation to complete the fabrication of the neutron detector. The invention has simple preparation process, does not need to prepare a neutron conversion layer separately, has high energy resolution, high detection efficiency and simple structure, and has important application value in aerospace exploration, nuclear energy utilization and development, generation and application of radioisotopes and some special fields .

The invention discloses a miniaturized composite gamma spectrometer. The spectrometer specifically comprises a semiconductor detection unit, a scintillation crystal, a photoelectric conversion device and a reading circuit. The innovation point is that a high-energy-resolution room-temperature semiconductor gamma detector is compactly arranged in a small-size cavity of a cup-shaped inorganic scintillation crystal, and the advantages of high detection efficiency of the inorganic scintillation crystal and high energy resolution of a semiconductor detector are integrated, so the spectrometer has the functions of low background gamma counting and high-resolution anti-Compton gamma-ray energy spectrum measurement, and can better meet the use requirements under different conditions. According to the technical scheme, gamma radiation detection in a wide dose rate range can be realized, refrigeration is not needed, a miniaturized and lightweight portable probe is easy to design, and a traditional high-purity germanium detector with an anti-Compton function can be replaced in part of application fields; and the spectrometer has a wide application prospect in the aspects of environmental radiation monitoring, radionuclide identification and the like.

Embodiments of the present invention provide a method and an apparatus for word detection in an application program. The method includes extracting a resource file from a multilingual application program installation package and converting the resource file into a text file. The method further includes disassembling the text file according to a language version to acquire a corresponding language text file; invoking a language detection tool according to the language version; and checking the language text file by using the language detection tool to identify questionable character information. The apparatus for word detection includes a file processing module, configured to extract a resource file from a multilingual application program installation package, and convert the resource file into a text file; and a disassembling module, configured to disassemble the text file according to a language version to acquire a corresponding language text file. The apparatus further includes a tool invoking module, configured to invoke a language detection tool according to the language version; and a text detection module, configured to check the language text file by using the language detection tool to identify questionable character information. Word detection efficiency in an application program can be improved by adopting the present disclosure.

An apparatus for intravascular imaging to detect and characterize early stage, unstable coronary arty plaques. The detector works by identifying and localizing plaque-binding beta-emitting radiopharmaceuticals.

The invention provides a tyramide hapten, artificial antigen, antibody and preparation and application thereof. The tyramide hapten has the molecular structure shown in formula I (formula I), and the tyramide artificial antigen has the molecular structure shown in formula II (formula II). The invention solves the defects of unreasonable and poor repeatability in the tyramide artificial antigen and antibody preparation scheme in the prior art. The titer of the antiserum obtained by immunizing animals with the artificial antigen prepared by the hapten of the present invention can reach 1:1000, the minimum detection limit is 26.8 ng / mL, and the half-inhibitory concentration is as low as 391.0 ng / mL, and the antibody has specificity High, good sensitivity, high accuracy, wide linear range and other significant advantages.

The invention discloses a method for quickly grading terrene surrounding rock in real time on the basis of while-drilling parameters. The relational expression between a clay soil liquidity index and the while-drilling parameters, the relational expression between the sandy soil standard penetration hammering number and the while-drilling parameters and the relational expression between the gravel soil dynamic sounding hammering number and while-drilling parameters can be established, in actual underground engineering, the soil variety of a terrene tunnel is firstly judged, drilling detection is conducted, the obtained while-drilling parameters are substituted into the relational expressions to obtain the liquidity index I<L> of clay soil surrounding rock, the standard penetration hammering number N of sandy soil surrounding rock and the dynamic sounding hammering number N<63.5> of gravel soil surrounding rock, and then quick and real-time grading is conducted on the surrounding rock in front of a tunnel face according to the Guidelines for Design of Highway Tunnel. According to the method for quickly grading the terrene surrounding rock in real time on the basis of the while-drilling parameters, only drilling testing needs to be conducted on the surrounding rock through a drilling machine at an engineering site, other tedious indoor tests or site tests are not needed, quick and real-time grading is conducted on the terrene surrounding rock, the grading efficiency is high, and operation is easy.

A signal detection method and device for a continuous variable quantum key distribution system. The method includes: splitting the received quantum light into a first split beam and a second split beam; combining the first split beam and the second split beam to generate a first combined beam; according to a preset polarization value, calibrate the polarization of the first combined beam; split the first combined beam into the first probe light and the second probe light; according to the preset phase value, modulate the phase of the local oscillator light; split the local oscillator light into the third probe light and the fourth probe light with orthogonal polarizations; perform homodyne detection on the first probe light and the third probe light, and perform homodyne detection on the second probe light and the fourth probe light to obtain the detection result; Detect the result and obtain the quantum state of the quantum light. Since this application introduces the strong light of local local oscillator light, even if the reference light is attenuated due to the long transmission process, the local local oscillator light can be supplemented, so as to prevent the detection efficiency of the receiver from becoming low, thereby improving the cost of the system. code rate.