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P. K. Bajpai Kuldeep Ratre Mukul Pastor T. P. Sinha 《Bulletin of Materials Science》2003,26(5):461-464
Samples of Sr(1− 3x/2)YxSnO3 are prepared by usual solid state reaction route. X- ray diffraction studies confirm the formation of single cubic perovskite
single phase. The dielectric constant and dielectric loss at 1 kHz were measured in the temperature range from room temperature
up to -150†C. The dielectric constant decreases and losses increase with increased yttrium content in the samples. The percentage
porosity and unit cell parameters are also calculated for the samples. 相似文献
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Simple cause – extensive damage. Continuation of a complex project in connection with an accident. In September 2008 at the Müritz‐Elde‐channel the new weir Lewitz could be started‐up. The originally planned construction period amounted to 15 months; however, about three years were actually needed. During the production of a temporary bypass in March 2006 an accident occurred. The consequences of the damage had to be eliminated first, before the planned project could be continued. Subsequently, the construction sequences and procedures had to be adapted to the changed boundary conditions. The accident, the removal of the damages and the effects to the building contract are represented in the following. 相似文献
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Walia Gurjit Singh Kumar Ashish Saxena Astitwa Sharma Kapil Singh Kuldeep 《Pattern Analysis & Applications》2020,23(3):1439-1455
Pattern Analysis and Applications - Particle filter is used extensively for estimation of target nonlinear and non-Gaussian state. However, its performance suffers due to its inherent problem of... 相似文献
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Wireless Personal Communications - The paper reports the performance of an energy harvesting cognitive radio network under primary user emulation (PUE) attack. A secondary user (SU) can harvest... 相似文献
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Yadav Ashish Mohan Tripathi Kuldeep Narayan Sharma S. C. 《The Journal of supercomputing》2022,78(3):4236-4260
The Journal of Supercomputing - With the rapid increase in the functionality of IoT applications, the services provided by edge/IoT devices have surged in the recent past. Fog computing is gaining... 相似文献
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In this paper, the impact of a multi slot based cooperative spectrum sensing (CSS) on the performance of a cognitive radio (CR) network has been investigated. Each CR user, equipped with an improved energy detector (IED), uses a number of mini slots of the sensing time to perform the spectrum sensing. Each CR uses OR logic to combine the sub local decisions generated in each mini slot to obtain a local decision at CR level. Local decisions are sent to fusion centre (FC) over reporting channel. The FC obtains a final decision about the presence of primary user (PU) by combining the local decisions using a fusion rule: Majority or Maximal Ratio Combining. The performance of the CSS is assessed in terms of detection probability and false alarm probability considering both the sensing and reporting channels are Rayleigh faded. Furthermore, the impact of a number of sensing slots and IED parameter on throughput of CR network is also evaluated under the proposed spectrum sensing scenario. Impacts of several sensing parameters such as sensing channel SNR and reporting channel SNR on the performance of CR network are also evaluated. Performances of two fusion rules under study are compared. Effect of sensing error and synchronisation error is indicated. Further the study is extended for independent but non identically distributed (i.n.i.d.) Rayleigh faded channels as well as for a multiple PU scenario also. 相似文献
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Journal of Low Temperature Physics - In this paper, the spontaneous polarization and the phase transition of order–disorder type H-bonded KH2PO4-type crystals are theoretically investigated.... 相似文献