Analysis of the throughput in full-duplex WLAN by Chen ZHAO, Yunzhou LI, Xibin XU, ANGJing W

“…WLAN is one of the important ways of accessing mobile internet.However，the performance of WLAN declines rapidly as the number of users increases.Improving the performance of WLAN with high density deployment is an important research direction of WLAN technology.Distributed coordination function（DCF）which was the basic media access method of IEEE 802.11 in infrastructure-based networks was modeled and the bottleneck of downlink throughput was pointed out.Taking advantage of full-duplex technology where there was a breakthrough in recent years，a new MAC protocol was designed and analyzed.By providing the AP full-duplex transmitting ability and simple modifications to traditional DCF protocol，the new protocol made the downlink throughput breaking through the bottleneck in infrastructure-based WLAN and increased the total throughput by more than 60%.…”
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Optimization of Microsoft Kaizala as an Interactive Media for Cybercounseling During the Covid-19 Pandemic by M Yunus Sudirman, Muh Idham Haliq, Suci Nora Julina Putri, Karisma Khoirul Hidayah

“…Cybercounseling requires the use of interactive media technology so that counseling services for students can continue to function optimally. Microsoft Kaizala is used for the interactive media planned to optimize cyber counseling during the COVID-19 pandemic because it is easier to use and has more unique features than other programs. …”
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Strain gradient elasticity within the symmetric BEM formulation by S. Terravecchia, T. Panzeca, C. Polizzotto

“…The symmetric Galerkin Boundary Element Method is used to address a class of strain gradient elastic materials featured by a free energy function of the (classical) strain and of its (first) gradient. …”
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Ethics in education supervision by Fatma ÖZMEN, Ali GÜNGÖR

“…In addition to determining the present situation, it has a theoretical and practical function regarding the actions to be taken in general and the achievement of teacher development in particular to meet the educational goals in the most effective way. …”
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Local Integral Estimates for Quasilinear Equations with Measure Data by Qiaoyu Tian, Shengzhi Zhang, Yonglin Xu, Jia Mu

“…Local integral estimates as well as local nonexistence results for a class of quasilinear equations -Δpu=σP(u)+ω for p>1 and Hessian equations Fk-u=σP(u)+ω were established, where σ is a nonnegative locally integrable function or, more generally, a locally finite measure, ω is a positive Radon measure, and P(u)~exp⁡αuβ with α>0 and β≥1 or P(u)=up-1.…”
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Principle Analysis and Orientation Mechanism Copy of Chinese Ancient South-pointing Carriage by Chen Wei, Sun Jianjian, Wen Huaixing

“…The ancient south- pointing carriage is commonly regarded as the Chinese forerunner of automatic machinery in China,it has a more prominent status in the process of mechanical development. …”
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FROM THE HUMAN-ENVIRONMENT THEME TOWARDS SUSTAINABILITY – DANISH GEOGRAPHY AND EDUCATION FOR SUSTAINABLE DEVELOPMENT by Thomas SKOU GRINDSTED

“…The analysis of the geographical education reveal that geographers’ find their discipline contribute considerably to ESD, and thus the human environment theme seems to be associated more closely with sustainability issues. …”
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Noise robust chi-square generative adversarial network by Hongjun LI, Chaobo LI, Shibing ZHANG

“…Aiming at the obvious difference of image quality generated by generative adversarial network under different noises,a chi-square generative adversarial network (CSGAN) was proposed.Combing the advantages of quantification sensitivity and sparse invariance,the chi-square divergence was introduced to calculate the distance between the generated samples and the original samples,which could reduce the influence of different noises on the generated samples and the quality requirement of original samples.Meanwhile,the network architecture was built and the global optimization objective function was constructed to enhance the adversarial performance.Experimental results show that the quality of the images generated by the proposed algorithm has little difference,and the network is more robust to different noises than the state-of-the-art networks.The application of chi-square divergence not only improves the quality of generated images,but also increases the robustness of the network under different noises.…”
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基于MATLAB与VRML的凸轮机构虚拟设计研究及实现 by 张明, 周智峰

“…Integrating Matlab Virtual Reality Toolbox,Matlab language and VRML technology,a virtual design system has been developed,on which various cam mechanisms can be designed.The software has a simple and clear graphical user interfaces,and can provide user with parameterized design,three-dimensional graphics and virtual simulation.Further more,the software has some assistant function such as parameter optimization,movement performance analysis,output for graphics and character data,and so on.On this system,user can interact on the virtual scene of cam mechanism created Real-timely,and control the course of simulation.The system indicates that the method can effectively reduce the difficulties and workload,and shorten the time of programing accordingly,because it could take advantage of MATLAB’s and VRML’s strongpoints.…”
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Bilingualism: the two languages of young people in care by Kim Snow

“…Institutions create their own languages, which become embedded in everyday experience (van Dijk, 1995). In order to function successfully, those in the subordinate position in the institution must learn the language of the institution. …”

Solving of the Workspace Boundary of Planar Parallel Mechanism based Modified PSO Algorithm by Ji Fangfang Zhao Xin

“…A general objective function is formulated to give the best value that the planar parallel mechanism reaches its limit point. …”
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Predictors and Consequences of Subclinical Renal Impairment in Patients with Vascular Disease by Somkereki Cristina, Nicoară Tunde Renata, Oprica Mădălina, Demian Liliana, Scridon Alina

“…The estimated glomerular filtration rate (eGFR) is the most widely used biomarker of kidney function. However, measurement of biomarkers more sensitive than eGFR may be required to detect subtle renal changes and to identify additional predictors and consequences of kidney injury.…”
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Protecting health facilities: design options for armed conflict and climate change disasters by Heather Groves, Adam L. Kushner, Shailvi Gupta

“…Natural disasters are becoming more dangerous with the advent of global climate change. …”
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Design of Round-Nozzle Inertial Impactors Review with Updated Design Parameters by Francisco J. Romay, Estíbaliz García-Ruiz

“…Abstract Round-nozzle inertial impactors are widely used aerosol measuring instruments to characterize the mass and chemical composition of airborne aerosol particles as a function particle aerodynamic diameter. This article summarizes the most important design considerations with updated recommended design parameters taken from our review of published research articles and discusses some of the more common non-idealities seen in the operation and performance of inertial impactors. …”
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On Comparing between Two Nonlinear Cournot Duopoly Models by S. S. Askar

“…The comparison between two nonlinear duopoly models constructed based on symmetric utility function that is derived from Cobb–Douglas is investigated in this paper. …”
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A European Mechanism for the Issuance and Initial Distribution of Debt Securities by Georgios Pavlidis

“…Abstract Although the European Union (EU) has implemented initiatives and common rules regarding securities settlements, no similar integration initiatives have been proposed for the issuance and initial distribution of debt securities. The EU does not function as a single market given that issuers of euro debt instruments still have to use multiple and non-harmonised channels and procedures. …”
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Stereo Image Segmentation Based on Graph Cut and Visual Correlation by Qingyan Dai, Zhongjie Zhu

“…Stereo image segmentation is a crucial and difficult issue in the field of object-based stereo image processing.By improving the Grabcut algorithm and exploiting the inter-view correlations,a novel stereo image segmentation scheme was proposed.The original left image was firstly transformed into a super-pixel image by improving the Slic algorithm.Then the super-pixel image was segmented and the foreground object in the left image is extracted based on the framework of Grabcut,where the energy function was rebuilt.Finally,by exploiting the inter-view correlations between the left and the right images,the foreground object in the right image was obtained based on contour correspondence by fusing color and texture features.The experimental results show that the proposed algorithm is more efficient and can achieve better segmentation results than the existing methods.…”
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Uretero-transappendix-cystoneostomy as a technique for the reconstruction of the lower part of the ureter by Milović Novak, Janjić Pero, Bančević Vladimir, Kuprešanin Srđan

“…By the use of an original combination of surgical techniques, a large defect of the ureter and the defect of the bladder, as well as the preservation of the renal function was achieved in a more successful manner.…”
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Cognitive network channel allocation method based on the queuing delay and game analysis by Jun LIU, Xiu-feng XIE

“…A new dynamic spectrum allocation method for distributed cognitive radio networks was proposed.In the method,packet transmission success rate is chosen as the utility function,the transmission delay is resolved by the priority queuing model,and the user’s channel allocation strategy is achieved by distributed game.Compared with other algorithms,the policy iteration process is improved effectively,and a dynamic strategy adjustment step is adopted.Each network user dynamically adjust their channel choose strategy based on current perception of the remaining user’s strategy.The proposed algorithm lets channel selection strategy converge more quickly to equilibrium point,and effectively suppresses the policy shocks.The simulation results validate the proposed algorithm.…”
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Analysis of the throughput in full-duplex WLAN by Chen ZHAO, Yunzhou LI, Xibin XU, ANGJing W

“…WLAN is one of the important ways of accessing mobile internet.However，the performance of WLAN declines rapidly as the number of users increases.Improving the performance of WLAN with high density deployment is an important research direction of WLAN technology.Distributed coordination function（DCF）which was the basic media access method of IEEE 802.11 in infrastructure-based networks was modeled and the bottleneck of downlink throughput was pointed out.Taking advantage of full-duplex technology where there was a breakthrough in recent years，a new MAC protocol was designed and analyzed.By providing the AP full-duplex transmitting ability and simple modifications to traditional DCF protocol，the new protocol made the downlink throughput breaking through the bottleneck in infrastructure-based WLAN and increased the total throughput by more than 60%.…”
Get full text