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In this paper,we present a monolithic integration of a self-protected AlGaN/GaN metal-insulator field-effect transistor(MISFET).An integrated field-controlled diode on the drain side of the AlGaN/GaN MISFET features a selfprotected function for a reverse bias.This diode takes advantage of the recessed-barrier enhancement-mode technique to realize an ultra-low voltage drop and a low turn-ON voltage.In the smart monolithic integration,this integrated diode can block a reverse bias(> 70 V/μm) and suppress the leakage current(< 5 × 10-11 A/mm).Compared with conventional monolithic integration,the numerical results show that the MISFET integrated with a field-controlled diode leads to a good performance for smart power integration.And the power loss is lower than 50% in conduction without forward current degeneration.  相似文献   
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该文以相关核电项目建设现场出现的主空压机高压转子涂层脱落问题为切入点,通过深入的调研和大量的数据及材料的对比研究,分析了高压转子涂层脱落的原因,并提出了建设性的解决方案。  相似文献   
3.
An analysis model of the dV/dt capability for a metal-oxide-semiconductor (MOS) controlled thyristor (MCT) is developed. It is shown that, in addition to the P-well resistance reported previously, the existence of the OFF-FET channel resistance in the MCT may degrade the dV/dt capability. Lower P-well and N-well dosages in the MCT are useful in getting a lower threshold voltage of OFF-FET and then a higher dV/dt immunity. However, both dosages are restricted by the requirements for the blocking property and the forward conduction capability. Thus, a double variable lateral doping (DVLD) technique is proposed to realize a high dV/dt immunity without any sacrifice in other properties. The accuracy of the developed model is verified by comparing the obtained results with those from simulations. In addition, this DVLD MCT features mask-saving compared with the conventional MCT fabrication process. The excellent device performance, coupled with the simple fabrication, makes the proposed DVLP MCT a promising candidate for capacitor discharge applications.  相似文献   
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该文主要介绍了核电站主压缩空气生产系统的作用、主要设备及运行方式,并以系统和设备调试过程中—次试验故障为切入点,深入比较分析了空压机与干燥器四种联锁控制方案的优劣,并提出相应改进建议及提出建设性的解决方案.  相似文献   
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汪志刚  陈万军  张竞  张波  李肇基 《中国物理 B》2012,21(8):87305-087305
In this paper, we present a monolithic integration of self-protected AlGaN/GaN metal-insulator field-effect transistor (MISFET). An integrated field-controlled diode on the drain side of the AlGaN/GaN MISFET features self-protected function at reverse bias. This diode takes advantage of the recessed-barrier enhancement-mode technique to realize an ultra-low voltage drop and a low turn-ON voltage. In the smart monolithic integration, this integrated diode can block reverse bias (>70 V/μm) and suppress the leakage current (<5×10-11 A/mm). Compared with conventional monolithic integration, the numerical results show that the MISFET integrated with a field-controlled diode leads to a good performance for smart power integration. And the power loss is lower than 50% in conduction without forward current degeneration.  相似文献   
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基于离散余弦变换的图像数字水印算法   总被引:1,自引:0,他引:1  
从密码术和信息隐藏的区别出发,运用数字通信理论中的数据加扰技术,提出一种在图像中植入数字水印的方法,该方法与JPEG图像数据的压缩标准算法相一致,运用了离散余弦变换,不仅可以方便地实现图像的植入,还可避免进行两次重复的变换,使水印的鲁棒性和抗攻击性得到有效的提高  相似文献   
7.
“普通高中课程标准实验教科书《 物理·选修3 2》 ” 第六章“ 传感器” 第3节 实验: 传感器的应用( 第6 4 页)中“ 问题与练习”的第1题, 从学生所学的电路的知识来分析, 这个防盗报警电路起不到报警作用  相似文献   
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文章对网络编程中涉及到的TCP/IP协议,讨论了Winsock通信机制核心技术,利用VC++的MFC编写基于客户/服务器模式的通信程序.实验结果表明:实现高达99M的文件无差错快速传输,耗时为11s.  相似文献   
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对人工智能中的经典启发式搜索算法———A 算法,进行较为详细的介绍,并以8数码问题(华容道问题)为例,对传统的启发函数(不在位的将牌的个数)进行了改进,改进后的启发函数采用每个将牌与其目标位置距离的综合.实践证明,新的启发函数能够大大提高搜索效率和节省搜索空间  相似文献   
10.
用射频磁控溅射方法在硅片上制备了Zn0.93Fe0.07O薄膜,并在空气中用不同温度进行热处理,利用X射线衍射仪和扫描电子显微镜对其微结构、表面和断面形貌进行测试.结果表明,薄膜沿c轴方向择优生长,呈六角纤锌矿结构,空气中450℃退火的样品XRD谱中出现最强的(002)衍射峰,晶粒尺寸变大,薄膜结晶和取向明显变好.用振动样品强磁计对样品铁磁特性进行测试,发现当退火温度的升高时,饱和磁化强度有所增加,并经分析认为这可能是薄膜中晶粒间的晶界缺陷引起的.  相似文献   
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