Holzinger, A.: Basiswissen Multimedia Bd. 1: Technik. Zahlir Abb., 284 S. ISBN 3-8023-1856-0; Bd. 2: Lernen. Zahlr. Abb., 290 S. ISBN 3-8023-1857-0; Bd. 3: Design. Zahlr. Abb., 280 S. ISBN 3-8023-1858-0. Vogl, Würzburg, 2000. DM 59,-, ATS 431,- (je Band)

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Holzinger, A.: Basiswissen Multimedia Bd. 1: Technik. Zahlir Abb., 284 S. ISBN 3-8023-1856-0; Bd. 2: Lernen. Zahlr. Abb., 290 S. ISBN 3-8023-1857-0; Bd. 3: Design. Zahlr. Abb., 280 S. ISBN 3-8023-1858-0. Vogl, Würzburg, 2000. DM 59,-, ATS 431,- (je Band)     

Exploiting W. Ellison model for seawater communication at gigahertz frequencies based on world ocean atlas data

Electromagnetic (EM) waves used to send signals under seawater are normally restricted to low frequencies () because of sudden exponential increases of attenuation () at higher . The mathematics of EM wave propagation in seawater demonstrate dependence on relative permeability (), relative permittivity (), conductivity (), and of transmission. Estimation of and based on the W. Ellison interpolation model was performed for averaged real‐time data of temperature () and salinity () from 1955 to 2012 for all oceans with latitude/longitude points and 101 depth points up to 5500 m. Estimation of parameters such as real and imaginary parts of , , , , loss tangent (tan ), propagation velocity (), phase constant (), and contributes to absorption loss () for seawater channels carried out by using normal distribution fit in the 3 GHz–40 GHz range. We also estimated total path loss () in seawater for given transmission power and antenna (dipole) gain. MATLAB is the simulation tool used for analysis.     

Accurate Tunable‐Gain 1/x Circuit Using Capacitor Charging Scheme

This paper proposes an accurate tunable‐gain 1/x circuit. The output voltage of the 1/x circuit is generated by using a capacitor charging time that is inversely proportional to the input voltage. The output voltage is independent of the process parameters, because the output voltage depends on the ratios of the capacitors, resistors, and current mirrors. The voltage gain of the 1/x circuit is tuned by a 10‐bit digital code. The 1/x circuit was fabricated using a 0.18 μm CMOS process. Its core area is , and it consumes 278 μW at and . Its error is within 1.7% at to 1 V.     

Operational results of grid‐connected photovoltaic system with different inverter's sizing factors (ISF)

This paper presents operational results of a 11·07 kWp grid‐connected photovoltaic system. This system is made up by eight groups with different relationships between the inverter's rated power and the PV generator's maximum power (P / P) . The obtained results led to the verification that the different studied relationships, P / P between 55 and 102%, do not affect significantly the final yields (Y_F). Copyright © 2006 John Wiley & Sons, Ltd.     

Q开关倍频Nd:YAG激光治疗浅表色素性皮肤病

目的:探讨Q开关倍频Nd:YAG激光治疗浅表色素性皮肤病的临床效果。方法:应用Q开关倍频Nd:YAG激光治疗雀斑、脂溢性角化病、雀斑样痣、咖啡斑、色素沉着-息肉综合征等浅表色素性皮肤病361例。色素1次治疗未消退者可行多次治疗,每次治疗间隔3个月。结果:雀斑169例、雀斑样痣9例、色素沉着-息肉综合征1例经1～2次治疗痊愈。脂溢性角化病123例经1～4次治疗痊愈103例,显效17例。咖啡斑59例经1~6次治疗痊愈12例,显效19例。所有患者治疗后均无疤痕。结论:Q开关倍频Nd:YAG激光治疗浅表色素性皮肤病疗效好,安全性高。     

Surface Micromachined Pressure Sensor with Internal Substrate Vacuum Cavity

A surface micromachined piezoresistive pressure sensor with a novel internal substrate vacuum cavity was developed. The proposed internal substrate vacuum cavity is formed by selectively etching the silicon substrate under the sensing diaphragm. For the proposed cavity, a new fabrication process including a cavity side‐wall formation, dry isotropic cavity etching, and cavity vacuum sealing was developed that is fully CMOS‐compatible, low in cost, and reliable. The sensitivity of the fabricated pressure sensors is 2.80 mV/V/bar and 3.46 mV/V/bar for a rectangular and circular diaphragm, respectively, and the linearity is and for these two diaphragms. The temperature coefficient of the resistances of the polysilicon piezoresistor is to per degree of Celsius according to the sensor design. The temperature coefficient of the offset voltage at 1 atm is 0.0019 mV and 0.0051 mV per degree of Celsius for a rectangular and circular diaphragm, respectively. The measurement results demonstrate the feasibility of the proposed pressure sensor as a highly sensitive circuit‐integrated pressure sensor.     

Distributed Self-Stabilizing Capacitated Maximal Independent Set Construction in Wireless Sensor Networks

Wireless sensor networks (WSNs) are composed of a large number of wireless self-organized sensor nodes connected through a wireless decentralized distributed network without the aid of a predefined infrastructure. Fault-tolerance and power management are fundamental challenges in WSNs. A WSN is self-stabilizing if it can initially start at any state and obtain a legitimate state in a finite time without any external intervention. Self-stabilization is an important method for providing fault-tolerance in WSNs. Maximal independent set (MIS) is an extensively used structure for many important applications such as clustering (Randhawa and Jain in Wirel Personal Commun 97(3):3355, 2017. https://doi.org/10.1007/s11277-017-4674-5) and routing (Attea et al. in Wirel Personal Commun 81(2):819, 2015. https://doi.org/10.1007/s11277-014-2159-3; Lipiński in Wirel Personal Commun 101(1):251, 2018. https://doi.org/10.1007/s11277-018-5686-5) in WSNs. The capacitated MIS (CapMIS) problem is an extension of MIS in that each node has a capacity that determines the number of nodes it may dominate. In this paper, we propose a distributed self-stabilizing capacitated maximal independent set algorithm (CapMIS) in order to reduce energy consumption and support load balancing in WSNs. To the best of our knowledge, this is the first algorithm in this manner. The algorithm is validated through theoretical analysis as well as testbed implementations and simulations.

     

New Time‐Domain Decoder for Correcting both Errors and Erasures of Reed‐Solomon Codes

A new time‐domain decoder for Reed‐Solomon (RS) codes is proposed. Because this decoder can correct both errors and erasures without computing the erasure locator, errata locator, or errata evaluator polynomials, the computational complexity can be substantially reduced. Herein, to demonstrate this benefit, complexity comparisons between the proposed decoder and the Truong‐Jeng‐Hung and Lin‐Costello decoders are presented. These comparisons show that the proposed decoder consistently has lower computational requirements when correcting all combinations of ν errors and μ erasures than both of the related decoders under the condition of , where d_min denotes the minimum distance of the RS code. Finally, the (255, 223) and (63, 39) RS codes are used as examples for complexity comparisons under the upper bounded condition of . To decode the two RS codes, the new decoder can save about 40% additions and multiplications when as compared with the two related decoders. Furthermore, it can also save 50% of the required inverses for .     

Opportunistic source scheduling in multi‐source two‐way relay networks

We consider a multi‐source two‐way relay network, in which one source communicates with N other sources (n = 1,2,…,N) with the help of a single amplify‐and‐forward relay. We propose two opportunistic source scheduling schemes in such a network. According to the proposed schemes, in each transmission interval, only a single out of the N sources is selected, and this selected node acts as either transmitter or receiver depending on the channel conditions. For both schemes, tight closed‐form lower bounds of outage probability and bit error rate (BER) are derived. Asymptotic outage probability and BER that are valid for high signal‐to‐noise ratio regime are also analyzed, which can provide important insights on the impact of system parameters. The analytical results show that the full diversity order N + 1 can be achieved by both proposed schemes. Simulation results are also presented to corroborate the analysis. Copyright © 2014 John Wiley & Sons, Ltd.     

Correction to: NLOS Identification for Localization Based on the Application of UWB

Wireless Personal Communications - A correction to this paper has been published: https://doi.org/10.1007/s11277-021-08539-4     

Q开关Nd:YAG激光治疗150例文身临床分析

目的:观察Q开关Nd:YAG激光对文身的治疗效果。方法:用Q开关Nd:YAG激光治疗不同类型的文身,能量密度5～12J/cm2,脉冲宽度5～7ns,重复频率1、2、5、10Hz,光斑尺寸2、3、4、6mm可调,对于文身较深者需多次治疗,每次间隔三个月。结果:共治疗150例,一次治愈率30％,总有效率达100％。结论:Q开关Nd:YAG激光治疗文身,组织损伤小,痛苦少,不留疤痕。     

Correction to: Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation

Journal of Infrared, Millimeter, and Terahertz Waves - A Correction to this paper has been published: https://doi.org/10.1007/s10762-021-00783-w     

Planar Multi-broadband Antenna for LTE/5G/GPS/GSM/UMTS and WLAN/WiMAX Wireless Applications

Wireless Personal Communications - A correction to this paper has been published: https://doi.org/10.1007/s11277-021-08608-8     

Correction to: Proposing an Energy-Aware Routing Protocol by Using Fish Swarm Optimization Algorithm in WSN (Wireless Sensor Networks)

Wireless Personal Communications - A correction to this paper has been published: https://doi.org/10.1007/s11277-021-08412-4     

Supercapacitive Properties of Composite Electrode Consisting of Activated Carbon and Di(1‐aminopyrene)quinone

Di(1‐aminopyrene)quinone (DAQ) as a quinone‐containing conducting additive is synthesized from a solution reaction of 1‐aminopyrene and hydroquinone. To utilize the conductive property of DAQ and its compatibility with activated carbon, a composite electrode for a supercapacitor is also prepared by blending activated carbon and DAQ (3:1 w/w), and its supercapacitive properties are characterized based on the cyclic voltammetry and galvanostatic charge/discharge. As a result, the composite electrode adopting DAQ exhibits superior electrochemical properties, such as a higher specific capacitance of up to at , an excellent high‐rate capability of up to , and a higher cycling stability with a capacitance retention ratio of 82% for the 1,000th cycle.     

射频电磁辐射场自动测试系统

用计算机、ＧＰＩＢ接口母线、信号发生器、功率放大器、场强监视器等构成自动测试系统,在“千兆赫横电磁波小室（ＧＴＥＭ）”内产生均匀的横电磁波。电场强度：１－３０Ｖ／ｍ,调幅度：０－９５％,频率范围：２０ＭＨｚ－１０００ＭＨｚ,任意步进扫频。充分满足了ＩＳＯ／ＩＥＣ６１０００－４－３《辐射（射频）电磁场抗扰度试验》等有关标准对试验装置的要求。     

IEC 61558-1:2005第二版与IEC 61558-1:1997+A1:1998第一版之间的差异

本文主要描述IEC 61558-1:2005第二版与IEC 61558-1:1997 A1:1998第一版之间的差异.     

Transparent OLED Lighting Panel Design Using Two‐Dimensional OLED Circuit Modeling

In this work, we develop a simulation method to predict a two‐dimensional luminance distribution method using a circuitry simulation. Based on the simulation results, we successfully fabricate large area transparent organic light‐emitting diode panels with high luminance uniformity.     

Leakage rate analysis with imperfect channel state information for cooperative nonorthogonal multiple access networks

This paper investigates the imperfect channel state information that is caused by the channel estimation error and feedback delay effects on the leakage rate analysis for the cooperative nonorthogonal multiple access networks. The investigation considers a dual hop one‐/two‐way nonorthogonal multiple access‐based information exchange process with the aid of half‐/full‐duplex untrustworthy wireless relaying network for the leakage rate analysis. The channel estimation error causes system coding gain losses while the feedback delay does not have any effect on the users' outage performance at untrustworthy relay terminal in low signal‐to‐noise ratio regimes. Conversely, the channel estimation error effects become negligible while the feedback delay causes system coding gain losses on the users' outage performance at untrustworthy relay terminal in high signal‐to‐noise ratio. Results also reveal that the untrustworthy relay terminal, which is under the effect of the channel estimation error and feedback delay, is being active between and ‐  dB. Beyond ‐  dB, the untrustworthy relay terminal becomes out of order and saturates. The Monte Carlo–based simulation results are in agreement with the analytical and asymptotic derivations.     

Joint routing,link capacity dimensioning,and switch port optimization for dynamic traffic in optical networks

This paper considers a challenging problem: to simultaneously optimize the cost and the quality of service in opaque wavelength division multiplexing (WDM) networks. An optimization problem is proposed that takes the information including network topology, traffic between end nodes, and the target level of congestion at each link/node in WDM networks. The outputs of this problem include routing, link channel capacities, and the optimum number of switch ports locally added/dropped at all switch nodes. The total network cost is reduced to maintain a minimum congestion level on all links, which provides an efficient trade-off solution for the network design problem. The optimal information is utilized for dynamic traffic in WDM networks, which is shown to achieve the desired performance with the guaranteed quality of service in different networks. It was found that for an average link blocking probability equal to 0.015, the proposed model achieves a net channel gain in terms of wavelength channels ( ) equal to 35.72 , 39.09 , and 36.93 compared to shortest path first routing and equal to 29.41 , 37.35 , and 27.47 compared to alternate routing in three different networks.