Abstract: A system for sensing particulate matter receives a first plurality of electronic signals from a photodetector over a period of time, the first plurality of electronic signals associated with a first plurality of particles, wherein each of the first plurality of electronic signals has a respective amplitude, sorts the first plurality of electronic signals into a plurality of amplitude levels, determines a respective quantity of signals associated with each amplitude level, determine an average summation of the first plurality of electronic signals, performs a calibration using the average summation, receives a second plurality of electronic signals from the photodetector over a period of time subsequent to the calibration, the second plurality of electronic signals associated with a second plurality of particles, and determines a mass concentration of the second plurality of particles based on the second plurality of electronic signals.

Abstract: A composition for glass, and aluminosilicate glass, preparation method therefor, and use thereof. In molar percentage, in the composition, the total content of SiO2, B2O3, P2O5, GeO2 and TeO2 is 60˜85 mol %; the total content of Al2O3 and Ga2O3 is 3˜20 mol %; the total content of ZnO and Y2O3 is 0.1˜5 mol %; and the total content of alkaline earth metal oxide is 4˜30 mol %. The glass has a high strain point, a low melting temperature, and a high thermal expansion coefficient, has good toughness, and is suitable for large-scale industrial production.

Abstract: A bogie, including a frame (1) and a bolster (2), the frame (1) including two parallel side beams (11), and a cross beam (12) coupled to the middle of the side beams (11), wherein a primary suspension is arranged between an end of the side beam (11) and an axle box (31), a secondary suspension is arranged between the below of the bolster (2) and the cross beam (12), and a tertiary suspension coupled to a vehicle body is arranged above the bolster (2). By including a bolster and an extra suspension on the basis of the conventional two suspensions, the disclosed bogie can achieve separation of the functions, so that the tertiary suspension only handles the transverse displacement, and the secondary suspension only handles the rotation, thereby further increasing the relative displacement and rotation angle between the vehicle body and the bogie when the vehicle negotiates a curve.

Abstract: The present invention relates to the field of glass manufacturing, and discloses aluminoborosilicate glass, and a preparation method and an application thereof. Based on the total weight of components in the composition of the glass, the glass comprises: 33-60 wt % SiO2, 3-10 wt % Al2O3, 10-30 wt % B2O3, 1-15 wt % ZnO+TiO2+Sc2O3, and 7-27 wt % alkali-earth oxide RO, wherein RO is at least one of MgO, CaO, SrO and BaO, and 0.001 wt %?Sc2O3?1 wt %. The aluminoborosilicate glass provided in the present invention has advantages including low density, high index of refraction, low thermal expansion coefficient, high thermostability, high flexibility, and easy bending, etc.

Abstract: A system (100) for sensing particulate matter includes a computing device (110) having a processor (114) and a memory (112) storing instructions which, when executed by the processor (114), cause the processor (114) to: receive a first plurality of electronic signals from a photodetector (108) over a particular period of time, the first plurality of electronic signals associated with a first plurality of particles, wherein each of the first plurality of signals has a respective amplitude (218), sort the first plurality of signals into a plurality of amplitude levels (220), determine a respective quantity of signals associated with each amplitude level (222), determine an average summation of the first plurality of signals (224), perform a calibration using the average summation (226), receive a second plurality of electronic signals from the photodetector (108) over a period of time subsequent to the calibration, the second plurality of electronic signals associated with a second plurality of particles (228),

Abstract: A method of detecting malware in Linux platform through the following steps: use objdump-D command to disassemble ELF format benign software and malware samples to generate assembly files; traverse the generated assembly files one by one, read the ELF files' code segment and meanwhile identify whether the code segment contains main( ) function; analyze the code segment read. Divide assembly code into different basic blocks. Each basic block is marked by its lowest address. Add control flow graph's vertex to the adjacency linked list; establish the relation between basic blocks, add control flow graph's edges to the adjacency linked list and generate a basic control flow graph; extract control flow graph's features and write them into ARFF files; take ARFF files as the data set of a machine learning tool named weka to carry out data mining and construct classifier; classify the ELF samples to be tested by using the classifier.

Abstract: A composition for polyurethane foaming, a polyurethane foam and a use thereof. The composition contains two different polyols with a polyethylene oxide ether structure and a polypropylene oxide ether structure, and a specific type of catalyst, flame retardant and water are added thereto; at the same time, the composition contains a small amount of a surfactant and other small molecular alcohols. The traits of the product are that it is pale yellow and transparent, and the product is not layered during long-term storage. The above-mentioned composition and polyphenylpolymethylene polyisocyanate (PAPI) produce a low-density polyurethane foam by means of a foaming machine.

Abstract: An ultraviolet (UV) light absorption sensing system (100) includes a UV light source (110) configured to provide a UV sample beam (115) of light toward a still or flowing fluid sample (117) along a central axis (118) of a test cell (120), wherein the central axis (118) is substantially orthogonal to a direction of fluid flow. A reference light source (130) is configured to provide a reference beam (133) along the central axis (118) of the test cell (120). A first detector (140) is positioned to detect a first portion (128) of the UV sample beam (115) and a first portion (138) of the reference beam (133) that traverse the test cell (120). A second detector (142) is positioned to detect a second portion (146) of the UV sample beam (115) and a second portion (148) of the reference beam (133) directly from the UV light source (110) and reference light source (130).

Abstract: This invention discloses a kind of reliable data transmission method based on reliable UDP and fountain code in aeronautical ad hoc networks. This method employs Raptor codes to recover from data loss and avoid retransmission in high loss and high delay channels. A light-weight feedback scheme is designed to provide reliability. An improved SNACK scheme is utilized to deal with the bandwidth asymmetric problem and a novel sliding window mechanism is proposed to avoid TCP's retransmission ambiguity problem and allow for more precise roundtrip-time calculation. A congestion control scheme is deployed to distinguish losses caused by congestion from losses caused by link handoffs to efficiently utilize the available bandwidth. This invention is fully implemented directly on top of UDP in Linux without requiring changes to the underlying network stack implementations. In harsh aeronautical ad hoc network environment, it is suitable for reliable and efficient data transfer service.

Abstract: This invention discloses a kind of reliable data transmission method based on hidden Markov model that specific to video transmission quality enhancement over lossy satellite links. It uses HMM model to forecast retransmission rate and adopts the network packet loss rate to reflect the network performance. The underlying network packet loss rate is used as the hidden state of HMM model and the retransmission rate is used as the observation state. By analyzing the historically transmitted data sessions, APRT establishes the relationship between the hidden state transition probability and the emission probability. Then, a robust and efficient retransmission rate prediction is obtained. This invention takes into full consideration of high BER in satellite network channels and adjusts the reliable level according to the satellite network channel characteristics so as to make tradeoff between instantaneity and quality. Consequently, it guarantee the QoS and QoE of video stream.

Abstract: A kind of congestion improvement method based on the QUIC protocol adds the information of round trip delay in the congestion algorithm, self-adaptive changes the value of ? to judge the situation of current network through comparison between the RTT of last time and the current RTT and then adjusts the current target window value in accordance with the current network situation, changing the congestion window based on the cubic growth curve of the cubic algorithm. This improvement method can make the QUIC protocol judge the current network situation more timely and accurately and can make the congestion window change quickly to fully utilize the bandwidth. The maximum congestion window limitation 200 exists in the QUIC protocol, which will not exceed 200 no matter how the congestion window grows. Such limitation largely reduces the throughput rate of QUIC protocol in the network environment with high bandwidth and long round trip delay.

Abstract: The present invention belongs to the field of fungicides, and relates to an amide compound and the preparation method and use thereof. The amide compound is as shown in general formula I: Each substituent in Formula I is defined in the description. The compound of general formula I of the present invention has an outstanding fungicidal activity, and can be used for controlling fungal diseases.

Abstract: This invention comes up with a kind of Android malicious code detection method on the base of community structure analysis. During the reverse analysis process of target program, firstly, it obtains critical static feature information automatically, such as permission, function, class, system API, etc.; secondly, it uses the call relation between functions to create function call graph, and undertakes pretreatment on function call graph; make cycle division and analysis for the weighted function call graph so as to get the correction division of community structure; finally, it extract features from community structures for machine learning and get the final maliciousness determination result. This invention method is able to undertake program internal structure analysis and malicious code detection rapidly when facing a large number of Android application program samples generated by “repackaging” technology.

Abstract: System (100) for calibrating particulate matter sensors includes a chamber (102) including a plurality of particulate matter sensors (104-1,104-2,104-3,104-N), a fan (110), a particulate matter source (108), an air cleaner (112), and a reference particulate matter sensor (106), a computing device (114) having a processor (118) and a memory (116) storing instructions which, when executed by the processor (118), cause the processor (118) to activate the particulate matter source (108) and the fan (110) until the reference concentration reaches a threshold, activate the air cleaner (112) responsive to the threshold being reached until the reference concentration reaches a calibration point, receive a respective determined mass concentration from each of the plurality of particulate matter sensors (104-1,104-2,104-3,104-N) at the calibration point, and calibrate each of the plurality of particulate matter sensors (104-1,104-2,104-3,104-N) based, at least in part, on a respective relationship between the reference

Abstract: This invention public a kind of malicious software clustering method expressed based on TLSH feature, which belongs to the analysis and test area of malicious software. Firstly, the Cuckoo Sandbox is used to analyze the malicious software to acquire three kinds of character string features, which are the static feature of the software, resource assess record during operation and API; And then the character strings are disassembled, filtered and sorted and the TLSH algorithm is used to compress them into three groups of feature values with size of 70 characters; Finally the OPTICS algorithm is utilized to realize the automatic classification on the malicious software family. This invention adopts unsupervised learning methods, which does not need the manual tab for the training in advance. The features which are extracted are compressed and expressed by using the TLSH.

Abstract: A bogie, including a frame (1) and a bolster (2), the frame (1) including two parallel side beams (11), and a cross beam (12) coupled to the middle of the side beams (11), wherein a primary suspension is arranged between an end of the side beam (11) and an axle box (31), a secondary suspension is arranged between the below of the bolster (2) and the cross beam (12), and a tertiary suspension coupled to a vehicle body is arranged above the bolster (2). By including a bolster and an extra suspension on the basis of the conventional two suspensions, the disclosed bogie can achieve separation of the functions, so that the tertiary suspension only handles the transverse displacement, and the secondary suspension only handles the rotation, thereby further increasing the relative displacement and rotation angle between the vehicle body and the bogie when the vehicle negotiates a curve.

Abstract: A kind of transmission method based on the learnable power model, which conducts periodic record for the historical change trend of the network. This method conducts weighting smooth processing on the round trip time and judges the changing trend of congestion control window. Then, it establishes model for the relationship between network power and the congestion control widow. When a new ACK is received, it immediately updates the window of power model. Finally, it forecasts the size of the congestion control window of the next time period by combining the congestion window and the network power changing trend. For the network packet loss or time-out events, the retransmission mechanism of traditional TCP is used, and when the packet loss ends, the power model process is used again. This invention reduces the influence of the network random events of the estimation error of traditional algorithm.

Abstract: A kind of self-adaptive network congestion control method based on SCPS-TP, which includes the following steps: The SCPS-TP's gateway source-end receives and transmits the packets to destination end; Judge if there is new packet received in accordance with the analyzed ACK; If there is no new packet received, when the duplicate ACK counter increase to a certain value, change the window size's growth pattern to linear self-adaptive pattern; If there is new packet received, the congestion control is in the exponential growth pattern. After window is enlarged, Diff is bigger than the set threshold value and the congestion control method is changed to linear self-adaptive pattern; If congestion control is in the linear self-adaptive pattern, adjust window size in accordance with Diff; The SCPS-TP's gateway source-end sends the packets in the packet loss buffer to destination end and sends new packets in accordance with the size of congestion window.

Abstract: A method of laying an optical fiber comprises providing a continuous optical fiber, a first segment of optical-electrical hybrid cable having a first fiber receiving tube, and a second segment of optical-electrical hybrid cable having a second fiber receiving tube. The optical fiber is laid into the first fiber receiving tube using an air-blowing device. A leading end of the optical fiber is fixed in a transfer apparatus after the leading end passes through an outlet of the first fiber receiving tube. A portion of the optical fiber which has passed through the first segment is wound in the transfer apparatus until the optical fiber is completely laid in the first segment. The leading end of the optical fiber is detached from the transfer apparatus. The portion of the optical fiber which has passed through the first segment is laid into the second fiber receiving tube using the air-blowing device.

Abstract: A X-ray chest image rib suppression method based on Poisson model. It conducts contourlet transformation on the image and utilizes transformation coefficient correlation between different scales to conduct texture enhancement on the image; it designs strip-type detection filter in accordance with the Hessian matrix eigenvalue to the image and detects the area where the rib locates in; it combines enhanced texture and rib area information, establishes and solves rib suppression Poisson model, realizing the rib suppression in the image.