一种新型的IGBT驱动保护电路

介绍一种新型的性能较完善的IGBT驱动保护电路。实验结果表明,该电路能快速、安全、可靠地实现保护功能。     

交织码在无线通信可靠性中的应用研究

在对无线通信可靠性要求较高的系统中，如何保证信息的无误接收是关键。本文讨论了交织码的纠错原理，给出了具体的编码设计，对可靠性的提高进行了定性和定量的分析，并在工程中得到了验证。     

立井刚性罐道的测斜系统研究

介绍了基于虚拟仪器方案的立井罐道测斜系统,探讨了自适应消噪方法在其中的应用,并设计了验证消噪效果的模拟实验。     

Fabrication of Cu(In,Ga)Se2 thin films by ion beam sputtering deposition from a quaternary target at different substrate temperatures

Cu(In, Ga)Se₂ (CIGS) thin films were fabricated by ion beam sputtering deposition from a single quaternary target at different substrate temperatures (T _sub). The thin films were characterized with X-ray diffractometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy and four-point probe technique to study the microstructures, surface morphology, composition and electrical properties, respectively. The results show that the films grown above 400?°C are of chalcopyrite structure. Cu(In_0.7Ga_0.3)Se₂ thin film was obtained when T _sub is 550?°C. The Cu and Se atomic percentage when T _sub is above 500?°C is higher than when T _sub is below 500?°C. With the increase in T _sub, the surfaces morphology of the films is denser and the resistivity of the films decreases.     

Image coding quality assessment using fuzzy integrals with a three-component image model

Based on importance measures and fuzzy integrals, a new assessment method for image coding quality is presented in this paper. The proposed assessment is based on two subevaluations. In the first subevaluation, errors on edges, textures, and flat regions are computed individually. The errors are then assessed using an assessment function. A global evaluation with Sugeno fuzzy integral is then obtained based on the importance measure of edge, texture, and flat region. In the second subevaluation, an importance measure is first established depending on the types of regions where errors occur, a subtle evaluation is then obtained using Sugeno fuzzy integral on all pixels of the image. A final evaluation is obtained based on the two subevaluations. Experimental results show that this new image quality assessment closely approximates human subjective tests such as mean opinion score with a high correlation coefficient of 0.963, which is a significant improvement over peak signal-to-noise ratio, picture quality scale, and weighted mean square error, three other image coding quality assessment methods, which have the correlation coefficients of 0.821, 0.875, and 0.716, respectively.     

微机控制太阳能逆变电源

介绍了一种微机控制太阳能逆变电源,在这里微计算机按照给定的功率来控制逆变电源的输出电流,由于采用了锁相环技术,保证了逆变电源的输出与电网电压严格同步。控制器选用 Ｉｎｔｅｌ ８９Ｃ５１单片机,并在实验室中进行了实验,实验结果证明理论分析是正确的。     

安装黏滞阻尼器的摇摆结构抗震性能分析

摇摆结构放松了结构与基础间的约束或构件间的约束,这些连接处只受压而不受拉,在地震作用下发生摇摆而其本身又不产生弯曲变形。摇摆降低了地震作用和结构本身的延性设计需求,减小了地震破坏,节约了结构造价。论文提出一种新型摇摆结构,即在传统摇摆结构上安装黏滞阻尼器,研究该结构在地震作用下的反应特点与减震效果。通过与摇摆框架的地震响应分析对比,表明安装黏滞阻尼器的摇摆框架能大幅度提高结构的抗震性能,降低地震带来的危害。     

Comprehensive Integrated Single-Cell Whole Transcriptome Analysis Revealed the p-EMT Tumor Cells—CAFs Communication in Oral Squamous Cell Carcinoma

Cancer-associated fibroblasts (CAFs) and partial epithelial–mesenchymal transition (p-EMT) tumor cells are closed together and contribute to the tumor progression of oral squamous cell carcinoma (OSCC). In the present study, we deeply analyzed and integrated OSCC single-cell RNA sequencing datasets to define OSCC CAFs and p-EMT subpopulations. We highlighted the cell–cell interaction network of CAFs and p-EMT tumor cells and suggested biomarkers for the diagnosis and prognosis of OSCC during the metastasis condition. The analysis discovered four subtypes of CAFs: one p-EMT tumor cell population, and cycling tumor cells as well as TNFSF12-TNFRSF25/TNFRSF12A interactions between CAFs and p-EMT tumor cells during tumor metastasis. This suggests the prediction of therapeutically targetable checkpoint receptor–ligand interactions between CAFs and p-EMT tumor cells in OSCC regarding the metastasis status.