排序方式: 共有17条查询结果,搜索用时 15 毫秒
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Improved Breakdown Voltage of Partially Depleted SOI nMOSFETs with Half-Back-Channel Implantation 总被引:3,自引:3,他引:0
:FB (floating-body) and BC (body-contact) partially depleted SOI nMOSFETs with HBC(half-back-channel) implantation are fabricated.Test results show that such devices have good performance in delaying the occurrence of the "kink" phenomenon and improving the breakdown voltage as compared to conventional PDSOI nMOSFETs,while not decreasing the threshold voltage of the back gate obviously.Numerical simulation shows that a reduced electrical field in the drain contributes to the improvement of the breakdown voltage and a delay of the "kink" effect.A detailed analysis is given for the cause of such improvement of breakdown voltage and the delay of the "kink" effect. 相似文献
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Johannes J. Schabort A-Reum Nam Kang-Hoon Lee Seok Won Kim Jeong Eon Lee Je-Yoel Cho 《International journal of molecular sciences》2020,21(22)
Canine mammary tumors (CMT) constitute the most common tumor types found in female dogs. Understanding this cancer through extensive research is important not only for clinical veterinary applications, but also in the scope of comparative oncology. The use of DNA methylation as a biomarker has been noted for numerous cancers in the form of both tissue and liquid biopsies, yet the study of methylation in CMT has been limited. By analyzing our canine methyl-binding domain sequencing (MBD-seq) data, we identified intron regions of canine ANK2 and EPAS1 as differentially methylated regions (DMGs) in CMT. Subsequently, we established quantitative methylation specific PCR (qMSP) of ANK2 and EPAS1 to validate the target hypermethylation in CMT tissue, as well as cell free DNA (cfDNA) from CMT plasma. Both ANK2 and EPAS1 were hypermethylated in CMT and highlighted as potential tissue biomarkers in CMT. ANK2 additionally showed significant hypermethylation in the plasma cfDNA of CMT, indicating that it could be a potential liquid biopsy biomarker as well. A similar trend towards hypermethylation was indicated in HBC at a specific CpG of the ANK2 target on the orthologous human region, which validates the comparative approach using aberrant methylation in CMT. 相似文献
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This paper presents a transceiver module for human body communications whereby a spread signal with a group of 64 Walsh codes is directly transferred through a human body at a chip rate of 32 Mcps. Frequency selective digital transmission moves the signal spectrum over 5 MHz without continuous frequency modulation and increases the immunity to induced interference by the processing gain. A simple receiver structure with no additional analog circuitry for the transmitter has been developed and has a sensitivity of 250 µVpp. The high sensitivity of the receiver makes it possible to communicate between mobile devices using a human body as the transmission medium. It enables half‐duplex communication of 2 Mbps within an operating range of up to 170 cm between the ultra‐mobile PCs held between fingertips of each hand with a packet error rate of lower than 10?6. The transceiver module consumes 59 mA with a 3.3 V power supply. 相似文献
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Abhishek Kandwal Huajie Tang Pengfei Ao Kun Wang Jingzhen Li Yuhang Liu Tobore Igbe Zedong Nie 《北京理工大学学报(英文版)》2022,31(1):81-90
This paper proposes a novel flexible antenna design operating at very high frequency (VHF) band for on-body applications such as human body communication (HBC). The antenna consists of back-to-back E-shaped fractal and complimentary structures designed over a thin flexible substrate. The overall design working on the principle of fractal geometries and capacitive coupling is highly beneficial to achieve better antenna characteristics even at low frequencies around 35 MHz–45 MHz that are being used for HBC application. The proposed antenna obtained a large bandwidth of around 10.0 MHz in air and a bandwidth of around 8.0 MHz during on-body operation. The antenna has been tested in three different scenarios viz. air, on-body single antenna and on-body communication using two antennas. The insertion loss is reduced to a minimum in all three scenarios, which is quite beneficial for better signal transmission. The size miniaturization with high flexibility in such low frequencies has also been achieved in the paper that makes the proposed design suitable for human body communication applications. 相似文献
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Fabrication and intermolecular interactions of silk fibroin/hydroxybutyl chitosan blended nanofibers
The native extracellular matrix (ECM) is composed of a cross-linked porous network of multifibril collagens and glycosaminoglycans. Nanofibrous scaffolds of silk fibroin (SF) and hydroxybutyl chitosan (HBC) blends were fabricated using 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) and trifluoroacetic acid (TFA) as solvents to biomimic the native ECM via electrospinning. Scanning electronic microscope (SEM) showed that relatively uniform nanofibers could be obtained when 12% SF was blended with 6% HBC at the weight ratio of 50:50. Meanwhile, the average nanofibrous diameter increased when the content of HBC in SF/HBC blends was raised from 20% to 100%. Fourier transform infrared spectra (FTIR) and (13)C nuclear magnetic resonance (NMR) showed SF and HBC molecules existed in hydrogen bonding interactions but HBC did not induce conformation of SF transforming from random coil form to β-sheet structure. X-ray diffraction (XRD) confirmed the different structure of SF/HBC blended nanofibers from both SF and HBC. Thermogravimetry-Differential thermogravimetry (TG-DTG) results demonstrated that the thermal stability of SF/HBC blend nanofibrous scaffolds was improved. The results indicated that the rearrangement of HBC and SF molecular chain formed a new structure due to stronger hydrogen bonding between SF and HBC. These electrospun SF/HBC blended nanofibers may provide an ideal tissue engineering scaffold and wound dressing. 相似文献
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用旋转粘度计法研究HBC水泥浆体的流变性能 总被引:1,自引:0,他引:1
本文主要介绍了用旋转粘度计法研究高贝利特水泥(简称 H BC)水泥浆体的流变性能,结果表明, H BC 水泥浆 体的流变性能符合宾汉塑性模式 τ=τ。+μp×γ。随着剪切速率的增加, H BC 水泥浆体与 PC 水泥浆体剪 切应力随之增加; H BC 水泥浆体与 PC 水泥浆体的塑性粘度和剪切应力规律相似,随着水灰比的增加 H BC,水泥 浆体与 PC 水泥浆体的塑性粘度下降。H BC 水泥的剪切应力及塑性粘度均低于 PC。研究表明 H BC 水泥浆体比 PC 水泥浆体具有更优异的工作性。 相似文献
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A. Etschmaier G. Mori W. Wegscheider H. Wieser 《Materialwissenschaft und Werkstofftechnik》2002,33(2):90-98
On the mechanism of solders during the M‐effect Slaggish switching‐off behaviour of HBC‐fusions (M‐effect) is ensured by a solder droplet on the copper fusion conductor. First the function of currently used toxic SnCd20 solder was investigated by melting, switching off and annealing tests. With these results the mechanism of the “M‐effect” was described and further tests were made with alternative alloys tin‐bismuth, tin‐indium and ternary alloys tin‐bismuth‐copper and tin‐indium‐copper. The ternary system tin‐bismuth‐copper was found to give best results and showed the same time‐temperature‐dissolution‐behaviour during the M‐effect as the SnCd20 solder. Function of different solders and necessary properties are discussed. 相似文献
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为探究人体通信(HBC)频段体内无线通信系统的传输特性,该文对解剖学数值人体模型和多层异质几何人体模型的体内至体表信道特性进行电磁仿真分析,首次建立了人体通信频段内10~50 MHz体内至体表路径损耗模型,并通过生物液态仿体内测量验证了电磁仿真和路径损耗模型的有效性。首先,结合时域有限积分法和数值人体模型计算10~50 MHz人体心脏节点至体表各节点的平均路径损耗,分析对比解剖学数值人体模型和多层异质人体模型的路径损耗、阴影衰落和电磁场分布特性。其次,基于表面波传播机理,提出一个带有线性修正项的对数路径损耗模型,最后建立完整的10~50 MHz体内至体表植入式人体信道模型。仿真分析和实验结果表明,该文提出的带有线性修正项的路径损耗模型可以更准确地描述此频段体内至体表路径损耗特性,采用解剖学数值人体模型进行此频段信道建模与特性研究可以有效提高植入式信道模型的可靠性。 相似文献