摘要：【中文】本申请实施例提供一种课程推荐设备及方法，该设备包括存储器、处理器以及存储在存储器中并可在处理器上运行的计算机执行指令，处理器获取待检测课程，通过待检测课程的上线时间，确定上述待检测课程的所属课程类型，再根据上述待检测课程的所属课程类型对应的异常学习评估指标，获得上述待检测课程的异常学习评估值，进而，判断上述待检测课程中是否存在异常学习，分析其学习量的真实性，识别出由于学员刷课等行为导致的异常学习课程，从而准确确定最佳课程，并且对最佳课程进行推荐，提高课程推荐精确性。 【EN】The embodiment of the application provides course recommending equipment and a course recommending method, the equipment comprises a memory, a processor and a computer execution instruction which is stored in the memory and can be run on the processor, the processor acquires a course to be detected, the type of the course to be detected is determined through the online time of the course to be detected, the abnormal learning evaluation value of the course to be detected is obtained according to the abnormal learning evaluation index corresponding to the type of the course to be detected, further, whether abnormal learning exists in the course to be detected or not is judged, the authenticity of the learning amount of the abnormal learning course is analyzed, the abnormal learning course caused by actions of student class brushing and the like is identified, the best course is accurately determined, the best course is recommended, and the course recommending accuracy is improved.

摘要：【中文】本发明公开的一种用于新生儿的亚低温治疗箱，包括密闭的箱体和制冷系统，新生儿放置在箱体中，通过制冷系统产色冷气器对箱体的内部进行降温，使温度到达亚低温状态，采用冷气流能够对新生儿的身体均匀降温，解决了现有水毯或冰袋在降温过程中，身体局部过冷的现象，同时也避免了冰水流淌，能湿衣物的问题，其次，箱体能够起到隔音作用，使新生儿处于一个安静的环境，有效缓解婴儿烦躁，安抚婴儿的作用。 【EN】The invention discloses a sub-low temperature treatment box for a newborn, which comprises a closed box body and a refrigerating system, wherein the newborn is placed in the box body, the interior of the box body is cooled through a color generation air cooler of the refrigerating system, so that the temperature reaches a sub-low temperature state, the body of the newborn can be uniformly cooled by adopting cold air flow, the phenomenon that the body is locally supercooled in the cooling process of an existing water blanket or ice bag is solved, the problem that ice water flows and clothes can be wetted is also avoided, secondly, the box body can play a sound insulation role, so that the newborn is in a quiet environment, and the functions of effectively relieving the dysphoria of infants and soothing the infants are achieved.

摘要：【中文】本发明公开了一种基于双IP核的无人机飞行控制系统，包括：姿态传感器模组，用于采集飞行器的姿态数据；制导传感器模组，用于采集飞行器的制导数据和捷联惯导数据；制导控制IP核模块，用于采用四元数扩展卡尔曼滤波算法对姿态数据进行计算得到飞行器的姿态信息，以及采用扩展卡尔曼滤波算法对制导数据和捷联惯导数据进行计算得到飞行器的导航信息：飞行控制IP核模块，用于接收第三方发送或预先设置的飞行控制信息，采用模糊自适应PID控制算法对飞行控制信息、姿态信息和导航信息进行计算得到伺服控制信号；伺服机构，用于根据伺服控制信号驱动飞行器的动力源，以完成对飞行器的飞行控制。本发明能够提高指令处理速度，减少逻辑资源占用。 【EN】The invention discloses an unmanned aerial vehicle flight control system based on double IP cores, which comprises: the attitude sensor module is used for acquiring attitude data of the aircraft; the guidance sensor module is used for acquiring guidance data and strapdown inertial navigation data of the aircraft; the guidance control IP core module is used for calculating the attitude data by adopting a quaternion extended Kalman filtering algorithm to obtain attitude information of the aircraft, and calculating the guidance data and the strapdown inertial navigation data by adopting an extended Kalman filtering algorithm to obtain navigation information of the aircraft: the flight control IP core module is used for receiving flight control information sent by a third party or preset, and calculating the flight control information, the attitude information and the navigation information by adopting a fuzzy self-adaptive PID control algorithm to obtain a servo control signal; and the servo mechanism is used for driving a power source of the aircraft according to the servo control signal so as to complete the flight control of the aircraft. The invention can improve the instruction processing speed and reduce the occupation of logic resources.

摘要：【中文】本发明提供了一种基于FPGA的USB3.0数据传输系统控制方法，涉及高速数据传输领域，其特征在于，包括信号处理模块、DDR3存储模块、FPGA主控模块、USB3.0数据传输模块和上位机显示模块，FPGA主控模块作为系统核心模块对系统运行时的时序和和逻辑进行控制，完成对DDR3控制器的控制功能使DDR3存储模块对FIFO中缓存的数据进行有序读取实现对数据的高速缓存，同时FPGA通过GPIF II接口以同步Slave FIFO的方式与EZ‑USB FX3控制器实现通信，使系统具有高的传输速率，而且逻辑资源占用率较少，提供了完善的传输及存储功能方法，满足高速数据的传输需求。 【EN】The invention provides a control method of a USB3.0 data transmission system based on an FPGA, which relates to the field of high-speed data transmission and is characterized by comprising a signal processing module, a DDR3 storage module, an FPGA main control module, a USB3.0 data transmission module and an upper computer display module, wherein the FPGA main control module is used as a system core module to control the time sequence and logic of the system during operation, the control function of a DDR3 controller is completed, so that the DDR3 storage module orderly reads the data cached in FIFO to realize the high-speed caching of the data, meanwhile, the FPGA realizes the communication with an EZ-USB FX3 controller in a way of synchronizing Slave FIFO through a GPIF II interface, the system has high transmission rate, the occupancy rate of logic resources is less, a complete transmission and storage function method is provided, and the transmission requirement of high-speed data is met.

摘要：【中文】本发明公开了一种基于SDR的数字下变频模型和设计方法，包括：将输入信号通过数模采样转换为数字信号；将数字信号输入至数字控制振荡器进行混频并输出两路正交信号；将两路正交信号进行抽取滤波并生成基带信号；将基带信号传输至DSP中完成建模；本发明通过对数字下变频模型的设计优化，使其在运行时所占用的硬件资源减少；通过抽取滤波模块中的三级滤波，使模型运算精度更加快速并且计算出的数据更加精确。 【EN】The invention discloses a digital down conversion model based on SDR and a design method, comprising the following steps: converting an input signal into a digital signal through digital-to-analog sampling; inputting a digital signal into a digital control oscillator for frequency mixing and outputting two paths of orthogonal signals; extracting and filtering the two paths of orthogonal signals and generating baseband signals; transmitting the baseband signal to the DSP to complete modeling; according to the invention, through design optimization of the digital down-conversion model, hardware resources occupied by the model during operation are reduced; through three-level filtering in the decimation filtering module, the model operation precision is faster and the calculated data is more accurate.

摘要：【中文】本发明公开了一种基于同频子图滤波的JPEG图像隐写信息定位方法，本发明将JPEG图像中各8×8分块相同位置的系数进行组合，得到64幅隐密图像同频子图，然后对各个隐密图像同频子图低通滤波，估计载体图像同频子图，从而估计载体JPEG图像，得到载体JPEG图像的DCT系数的估计；接着计算多幅嵌入路径和嵌入率都相同的待检测隐密图像中每个位置的残差均值，根据残差均值实现隐密位置估计，并在计算残差时考虑JPEG图像隐写时不在特定系数中嵌入信息的特点，显著提高对JSteg隐写的隐密位置定位准确率。 【EN】The invention discloses a JPEG image steganography information positioning method based on same-frequency subgraph filtering, which combines coefficients at the same position of 8 multiplied by 8 blocks in a JPEG image to obtain 64 steganography images with the same frequency, then carries out low-pass filtering on the same-frequency subgraphs of the steganography images to estimate the carrier image with the same frequency subgraph, thereby estimating a carrier JPEG image and obtaining the estimation of DCT coefficients of the carrier JPEG image; and then calculating a residual error mean value of each position in the multiple concealed images to be detected with the same embedding path and embedding rate, realizing concealed position estimation according to the residual error mean value, and considering the characteristic that information is not embedded in a specific coefficient when the JPEG image is concealed when calculating the residual error, thereby obviously improving the positioning accuracy of the concealed position of JSTEG concealed writing.

摘要：【中文】本发明属于铜合金材料技术领域，具体涉及一种高承载止推轴承用铜合金材料及其制备方法、潜油电泵用高承载止推轴承。本发明的高承载止推轴承用铜合金材料，由以下质量百分比的组分组成：Sn：9.5～11.0％，Ni：1.8～2.0％，Pb：0.9～1.1％，P含量低于0.03％，余量为Cu。该铜合金材料中Sn元素的添加可以使铜合金更易生成致密的保护性膜层，提高材料的耐磨性、耐疲劳寿命，不易产生咬死现象。 【EN】The invention belongs to the technical field of copper alloy materials, and particularly relates to a copper alloy material for a high-bearing thrust bearing, a preparation method of the copper alloy material, and the high-bearing thrust bearing for an electric submersible pump. The copper alloy material for the high-bearing thrust bearing comprises the following components in percentage by mass: sn: 9.5-11.0%, Ni: 1.8-2.0%, Pb: 0.9-1.1%, the content of P is less than 0.03%, and the balance is Cu. The addition of Sn element in the copper alloy material can make the copper alloy generate a compact protective film layer more easily, improve the wear resistance and fatigue life of the material and avoid seizure phenomenon.

摘要：【中文】本发明公开了一种基于差分通道权重分配的彩色图像隐写检测方法，本发明根据目标隐写算法和嵌入率，获取待检测彩色图像的三个颜色通道的嵌入更改概率矩阵；计算待检测彩色图像的三个差分通道，将每个差分通道相同位置的两个嵌入更改概率的最大值，作为所述差分通道的差分残差的权重，得到差分通道的权重分配矩阵；再得到每个差分通道的m幅残差图像，并计算出q个带权重的四维共生矩阵，得到待检测彩色图像的隐写检测特征；基于该特征和现有技术提取的CRMQ1特征利用训练好的隐写检测器对待检测彩色图像进行检测，判断待检测彩色图像是否为隐密图像，降低了隐写图像检测的平均检测错误率。 【EN】The invention discloses a color image steganography detection method based on differential channel weight distribution, which is characterized by obtaining embedded change probability matrixes of three color channels of a color image to be detected according to a target steganography algorithm and an embedding rate; calculating three differential channels of a color image to be detected, and taking the maximum value of two embedded change probabilities at the same position of each differential channel as the weight of a differential residual error of the differential channel to obtain a weight distribution matrix of the differential channel; and obtaining each differential channelmAmplitude residual image, and calculatingqObtaining steganography detection characteristics of the color image to be detected by using a four-dimensional co-occurrence matrix with weights; based on the features and the CRMQ1 features extracted in the prior art, the color image to be detected is detected by using the trained steganography detector, whether the color image to be detected is a steganography image or not is judged, and the average detection error rate of steganography image detection is reduced.

摘要：【中文】本发明公开了一种基于PCIE高速数据采集系统，包括信号处理模块、ADC模块、FPGA时序单元、PC机、DDR2SDRAM模块以及PCIE核模块；信号处理模块用于对输入信号进行放大、隔离、线性化以及滤波处理，将处理后的信号输入ADC模块中；ADC模块用于对信号处理模块传输的信号进行模数转换；FPGA时序控制单元将ADC模块与PCIE模块连接；用于对系统进行时序控制；PCIE核模块用于提供逻辑控制信号；DDR2SDRAM模块用于对FPGA时序单元采集的数据进行缓存处理；PC机用于识别PCIE核模块并对PCIE进行相对应的硬件操作。本发明的有益效果为采用所设计的采集系统，使得传输带宽快、功耗低以及成本低，所存储的空间大，灵活性更好。 【EN】The invention discloses a PCIE-based high-speed data acquisition system, which comprises a signal processing module, an ADC (analog-to-digital converter) module, an FPGA (field programmable gate array) time sequence unit, a PC (personal computer), a DDR2SDRAM (synchronous dynamic random access memory) module and a PCIE core module; the signal processing module is used for amplifying, isolating, linearizing and filtering the input signal and inputting the processed signal into the ADC module; the ADC module is used for performing analog-to-digital conversion on the signal transmitted by the signal processing module; the FPGA time sequence control unit connects the ADC module with the PCIE module; the system is used for carrying out time sequence control on the system; the PCIE core module is used for providing a logic control signal; the DDR2SDRAM module is used for caching data acquired by the FPGA time sequence unit; the PC is used for identifying the PCIE core module and performing corresponding hardware operation on the PCIE. The invention has the advantages that the designed acquisition system is adopted, so that the transmission bandwidth is fast, the power consumption is low, the cost is low, the storage space is large, and the flexibility is better.

摘要：【中文】本发明公开了一种抗统计检测及抗缩放攻击的图像隐写方法，包括计算缩放因子、预处理并对载体图像模拟缩放因子为的缩放过程、基于反向插值运算的信息实际嵌入规则的构建、基于位置映射的信息嵌入算法和提取信息；本发明通过将信息实际嵌入值与信息实际嵌入点一一对应构，提出一种基于反向插值运算的信息嵌入规则构造算法，保证信息的提取正确率，即能够从遭受缩放攻击后的图像中正确提取信息，提高图像隐写方法的抗缩放攻击能力，通过采用基于位置映射的信息嵌入算法，当载密图像遭受缩放攻击后，不仅能够保证嵌入信息的正确提取，而且有效提高遭受缩放攻击的载密图像的抗统计检测性能。 【EN】The invention discloses an image steganography method for resisting statistical detection and scaling attack, which comprises the steps of calculating a scaling factor, preprocessing, simulating a scaling process of the scaling factor to a carrier image, constructing an information actual embedding rule based on reverse interpolation operation, embedding an algorithm based on position mapping and extracting information; the invention provides an information embedding rule construction algorithm based on reverse interpolation operation by constructing the information actual embedding value and the information actual embedding point in a one-to-one correspondence manner, thereby ensuring the extraction accuracy of the information, namely correctly extracting the information from the image subjected to the zooming attack, and improving the anti-zooming attack capability of the image steganography method.