Research of the Fast Modeling for Spiral Bevel Gear with Spherical Involute based on the SWEEP by Li Tongzhong, Fan Jun, Adayi·Xieeryazidan

“…The parametric modeling of spiral bevel gear is of great significance to its further research on tooth contact analysis in its digitized design.From the precision of spiral bevel gear tooth with spherical involute tooth profile,the principle of forming the spherical involute is used to solve the parametric equations of all parts of tooth profile curve.Combining the unique advantages of Frenet frame in the SWEEP surface modeling,a modeling method of tooth surface of spiral bevel gear with the spherical involute is presented based on the SWEEP.Finally,the model is created by using the transverse tooth profiles through the SWEEP method.The numerical example verified that this method can finish fast and accurate parametric modeling process of the spiral bevel gear tooth surface,a new access to design of the spiral bevel gear is provided.…”
Get full text

Approximate Controllability for Impulsive Riemann-Liouville Fractional Differential Inclusions by Zhenhai Liu, Maojun Bin

Get full text

STUDY ON RELIABILITY OF PHOTOELECTRIC PCB UNDER THERMAL CYCLE by CHENG Lei, ZHOU DeJian, WU ZhaoHua

“…The influence of thermal cycle loading on optoelectronic PCB（Printed Circuit Board） reliability was presented.In product conceptual design stage,the three-dimensional finite element model of photoelectric PCB was established.The finite element analysis was carried out under thermal cycle loading which defined by GJB 150.5-86.The influence includes solder joints reliability of optoelectronic PCB,optical coupling efficiency and optical fiber reliability.The following results are obtained.First,the maximum stress of solder joint and optical fiber ribbon is in the security range and the structure is not destroyed.Second,photoelectric coupling efficiency is not changed significantly,which guarantees the stability of the optical transmission.It proves the feasibility of the design scheme and promotes the engineering applications of photoelectric interconnection technology.…”
Get full text

Research of the Method of Selection of Modification Coefficient Value of the Planetary Involute Gear with Small Teeth Difference based on Matlab by Feng Ding, Yang Hang, Feng Yijing, Wang Jie, Xiang Zhengxin, Wu Han

“…According to the definition of planetary gear transmission with small teeth difference,the selection of value of modification coefficient is the key in the design of planetary gear reducer with small teeth difference. …”
Get full text

Analysis of the System Composition and the Obstacle Ability of Hexapod Spider Crawling Robot by Ziyue Wu, Yanliang Song, Zhifeng Wu

“…This study provides a further basis for the design of a crawling robot.…”
Get full text

Adaptive beamforming of massive MIMO based on DoA in high mobility scenarios by Yong LIAO, Yu-feng LI, Xuan-fan SHEN

“…A direction of arrival based (DoA-based) beamforming of massive MIMO was proposed for high-speed railway scenarios.In order to guarantee that the optimal system capacity can be obtained during traveling,an iterative multi-beams scheme was proposed.It aimed to design different beams for different mobile carriage terminals (MCT) respectively.The proposal adaptively selected the number of antennas for each beam,and adaptively designed the number of beams according to system capacity.Moreover,the scheme didn’t need channel state information (CSI) that can reduce system implementation complexity and cost.Numerical results indicate that the proposed scheme is suitable for high-speed scenarios,the system performance can be improved more efficiently compared to conventional methods.…”
Get full text

CRLH Transmission Lines for Telecommunications: Fast and Effective Modeling by Juanjuan Gao, Guizhen Lu

“…The equivalent circuit modeling can improve the degree of freedom in the CRLH TLs design. This parameter extraction method provides an effective and straightforward way in CRLH metamaterials design and applications in telecommunication systems.…”
Get full text

Nonlinear transform coding for semantic communications by Ping ZHANG, Jincheng DAI, Yuming ZHANG, Sixian WANG, Xiaoqi QIN, Kai NIU

“…The modular design and limited processing mechanism of traditional communication systems limit the continuous improvement of end-to-end data transmission capability.For this reason, a new nonlinear transform coding framework for semantic communications was proposed.First, an end-to-end rate distortion optimization criterion for semantic communication was derived based on variational theory.Based on this, a nonlinear transform was designed to extract the compact representation of source data in the semantic latent space, and variable-rate nonlinear joint source-channel coding was implemented through the guidance of variational entropy model.Experiments show that semantic nonlinear transform coding can significantly improve the end-to-end data transmission performance and robustness, and is one of the key technologies to catalyze future semantic communications.…”
Get full text

Toward an Architecture of Dissensus: Participatory Urbanism in South-East Asia by Camillo Boano, Emily Kelling

“…Adopting Rancière’s principles of equality, his concepts of aesthetics and le partage du sensible as an intellectual toolbox, this paper examines how practices of participation in informal settlement development might encourage one to think differently about the relationship between politics, design and the city – contributing thus to the debate about participatory urbanism. …”
Get full text

Coordinated beamforming for cognitive multi-cell networks with wiretap channels by Dong-hua CHEN, Xiu-xiu ZHANG, Wei-bo XIE

“…Owing to the coupling among the vectors to be optimized，the problem becomes non-convex and non-linear.Accordingly，a centralized coordinated beamforming design method was proposed by constraining the leakage interference and using the semi-definite relaxation，and on the base of it，a decentralized algorithm was also proposed by decomposing the centralized design problem into a group of sub-problems on each cell’s base by using dual decomposition.Simulation results show that the proposed schemes make effective reduction in power consumption while guarantee the legal users’ secrecy rate requirement and the cognitive interference constraint.Moreover，the proposed decentralized method not only reduces the computational complexity，but also has the same performance as the centralized algorithm.…”
Get full text

Study on integrated sensing and communication for 6G RAN by Shiqiang SUO, Shenghao XU, Ting ZENG, Qiusha GONG, Ke WANG

“…The integrated sensing and communication technology has become one of the important research directions for 6G system.The necessity of integrated sensing and communication at the air inter face was analyzed and summarized, as not only for improving the service capacity for 6G system but also for effectively improving the spectrum utilization.One integrated sensing and communication scheme at the air interface level for 6G RAN was proposed, including the high level framework of RAN system, the multiplexing mode of wireless sensing signal and communication signal, the design of integrated channel/signal, etc.for further study.The challenges of integrated sensing and communication at the air interface were analyzed.It was pointed out that integrated sensing and communication at the air interface would have an important impact on the design of 6G RAN protocol stack, which needed to be focused on.…”
Get full text

RESEARCH ON WELD FAILURE ANALYSIS OF PLUNGER OF ABAQUS MULTISTAGE CYLINDER by LIU YanPing, LIN FangJun, WANG HaiLong, WANG GuoYuan

“…Based on ABAQUS software, fatigue simulation analysis and bench test were carried out on the weld, which effectively verified the consistency of design optimization and bench test and reduced the failure rate. …”
Get full text

6G endogenous security:architecture and key technologies by Yang LIU, Mugen PENG

“…At the beginning of design for the traditional mobile communication systems,security is considered as an independent technology,relying on “patch” and “plug-in” to realize the security protection of wireless communica-tion.The sixth-generation (6G) mobile communication system is designed based on software-defined slicing platform,edge computing,artificial intelligence and big data mining to adapt to different application scenarios and performance objectives,making the traditional network security mechanisms difficult to guarantee 6G's requirements for embed-ded security.6G endogenous security was proposed,the architecture and key technologies of 6G endogenous security were described,the security threats in the new technologies were discussed which 6G would adopt,and the chal-lenges and future research directions of 6G endogenous security were provided.…”
Get full text

An Evolutionary Hypothesis for Obsessive Compulsive Disorder: A Psychological Immune System? by Riadh T. Abed, Karel W. de Pauw

“…It is hypothesised that obsessional phenomena function as an off-line risk avoidance process, designed to lead to risk avoidance behaviour at a future time, thus distinguishing it from anxiety and related phenomena as on-line emotional states, designed to lead to the avoidance of immediate and direct risks. …”
Get full text

Measuring and analyzing node families in the Tor anonymous communication network by Xiao WANG, Bin-xing FANG, Pei-peng LIU, Li2 GUO, Jin-qiao SHI

“…Tor family was focused on design and given a family-level measurement of it.Based on Tor node families (over 3000) discovered from live Tor network data (from Jan.2011 to Dec.2012),a few characteristics of Tor node families were revealed,such as family size,bandwidth,geographical distribution as well as operators providing a few big families.The analysis validated the irreplaceable role played by family design in enhancing Tor’s anonymity.Based on the measurement,security analysis showed the serious availability threat a compromised node family can cause to the Tor network.Besides,It also discussed Tor hidden families and the potential anonymity risk caused by them.…”
Get full text

Key technologies of non-orthogonal multiple access for 5G systems by Yuanyuan DONG, Yujie ZHANG, Hua Li, Chunlei WANG, Xiaofei LIU, Xiaoming DAI

“…Firstly, the complexity-constrained NOMA design principle was proposed. Then, a comprehensive study of key NOMA schemes was conducted, in which the theory of each scheme was provided. …”
Get full text

Stabilization and Tracking Control of Inverted Pendulum Using Fractional Order PID Controllers by Sunil Kumar Mishra, Dinesh Chandra

“…This work focuses on the use of fractional calculus to design robust fractional-order PID (PIλDμ) controller for stabilization and tracking control of inverted pendulum (IP) system. …”
Get full text

Politi og arkitekters forebyggingslogikker: Forståelser av kriminalitetsforebyggende arbeid i offentlige rom by Marina Hiller Foshaugen

“…Abstract This article focuses on crime prevention through architecture, environmental design and other situational modifications to public space. …”
Get full text

Criteria of Coverage, Novelty, Search Printout and User Effort in Evaluating the Quality of Literature Searches by Nazlı Alkan

“…In general terms, relevance is the basic criterion which designates the quality of literature searches. Users of searching sen’ices are principally interested in relevance, that is the number of relevant articles retrieved. …”
Get full text

InTEIrviews: An ODD for Qualitative Interviews in the Humanities by Marie Puren, Florian Cafiero

“…Even when they are, annotations are mostly absent, and rarely standardized or designed to be read by anyone but the initial research team. …”
Get full text