Global Topological Structure of a Class of Plane Homogeneous Fifth System with Six Special Direction

在这份报纸，飞机的一个班同类有六个特殊方向的第五个系统被学习，并且全球拓扑的分类和系数条件被讨论。

LIMIT CYCLES BIFURCATED FROM THE ORIGIN AND EQUATOR FOR A CLASS OF FIFTH SYSTEM

For a class of real fifth system, the first 8 singular point quantities of the origin and the first 6 singular point quantities of the equator are obtained, and at the same time, the two highest-order cases are proved respectively. Moreover, the problems of stability and limit cycle bifurcated from the origin and the equator are studied comparatively, then some better results are obtained.

Numerical investigations to design a novel model based on the fifth order system of Emden–Fowler equations

The aim of the present study is to design a new fifth order system of Emden–Fowler equations and related four types of the model.The standard second order form of the Emden–Fowler has been used to obtain the new model.The shape factor that appear more than one time discussed in detail for every case of the designed model.The singularity atη=0 at one point or multiple points is also discussed at each type of the model.For validation and correctness of the new designed model,one example of each type based on system of fifth order Emden–Fowler equations are provided and numerical solutions of the designed equations of each type have been obtained by using variational iteration scheme.The comparison of the exact results and present numerical outcomes for solving one problem of each type is presented to check the accuracy of the designed model.

Improvements in Iodine Stabilized He-Ne Easers at 474 THz (633 nm) with Compatible System of Third and Fifth Harmonic Locking

We have developed two 474 THz(633 nm)new iodine stabilized He-Ne lasers with compatible system of third and fifth harmonic locking.The frequency stability is 1.0×10-11/ 1s and 3.5×10-12 / 10s with third harmonic locking,and corresponding values are 1.3×10-11/1s and 4.0×10-12/ 10s with fifth harmonic locking.We found that the frequency difference between the same component with third and fifth harmonic locking are from 5 kHz to SO kHz.Our experiment and analysis indicate that the center of fifth harmonic signals is closer to the Lorentzian center in iodine absorption component than one of the third harmonic signals,and the reproducibility with fifth harmonic locking is also better than one with third harmonic locking.

CENTER CONDITIONS AND BIFURCATION OF LIMIT CYCLES FOR A CLASS OF FIFTH DEGREE SYSTEMS

The center conditions and bifurcation of limit cycles for a class of fifth degree systems are investigated.Two recursive formulas to compute singular quantities at infinity and at the origin are given.The first nine singular point quantities at infinity and first seven singular point quantities at the origin for the system are given in order to get center conditions and study bifurcation of limit cycles.Two fifth degree systems are constructed.One allows the appearance of eight limit cycles in the neighborhood of infinity,which is the first example that a polynomial differential system bifurcates eight limit cycles at infinity.The other perturbs six limit cycles at the origin.

Unmanned aerial vehicle based intelligent triage system in mass-casualty incidents using 5G and artificial intelligence

BACKGROUND:Rapid on-site triage is critical after mass-casualty incidents(MCIs)and other mass injury events.Unmanned aerial vehicles(UAVs)have been used in MCIs to search and rescue wounded individuals,but they mainly depend on the UAV operator’s experience.We used UAVs and artificial intelligence(AI)to provide a new technique for the triage of MCIs and more efficient solutions for emergency rescue.METHODS:This was a preliminary experimental study.We developed an intelligent triage system based on two AI algorithms,namely OpenPose and YOLO.Volunteers were recruited to simulate the MCI scene and triage,combined with UAV and Fifth Generation(5G)Mobile Communication Technology real-time transmission technique,to achieve triage in the simulated MCI scene.RESULTS:Seven postures were designed and recognized to achieve brief but meaningful triage in MCIs.Eight volunteers participated in the MCI simulation scenario.The results of simulation scenarios showed that the proposed method was feasible in tasks of triage for MCIs.CONCLUSION:The proposed technique may provide an alternative technique for the triage of MCIs and is an innovative method in emergency rescue.

The Chinese People's Association for Friendship with Foreign Countries Holds the Fifth China-U.S.Sister Cities Conference

The Fifth China-U.S.Sister Cities Conference,cohosted by the Chinese People's Association for Friendship with Foreign Countries and Jiangsu Provincial People's Government,opened in Suzhou City,Jiangsu Province on November 3 under the theme of"Build Green Cities for the People".Chinese President Xi Jinping sent a congratulatory message to the conference.Zhu Yongxin,Vice-Chairman of the National Committee of the Chinese People's Political Consultative Conference and Executive Vice-Chairman of China Association for Promoting Democracy read out President Xi's message at the conference.

New Conservation Law and a Consideration as to When Forming a Cosmological Constant Term: Using Fifth Force for Frequency of BEC “Gravitons” and Cosmological Constant Formed before BEC Gravitons Form

We use scalar fields. The scalar field version which we are using is one from Padmanabhan, and the problem is that the scalar field in the Padmanabhan representation is initially only dependent on time. We also refer to a new assumed conservation law which will give new structure as to inflationary expansion and its immediate aftermath. That of the Hubble “constant” is divided by the “time derivative” of the scalar field in the inflation regime and then a long time afterwards. In doing so, we help define when the cosmological constant may form and what they says about the advent of dark energy.

Numerical Treatments for Crossover Cancer Model of Hybrid Variable-Order Fractional Derivatives

In this paper,two crossover hybrid variable-order derivatives of the cancer model are developed.Grünwald-Letnikov approximation is used to approximate the hybrid fractional and variable-order fractional operators.The existence,uniqueness,and stability of the proposed model are discussed.Adams Bashfourth’s fifth-step method with a hybrid variable-order fractional operator is developed to study the proposed models.Comparative studies with generalized fifth-order Runge-Kutta method are given.Numerical examples and comparative studies to verify the applicability of the used methods and to demonstrate the simplicity of these approximations are presented.We have showcased the efficiency of the proposed method and garnered robust empirical support for our theoretical findings.

基于FIFTH项目的德国应用技术大学“第三使命”效能评估研究

FIFTH是以德国高校科研以及与科研相关的"第三使命"为考察对象的评估项目。在借鉴相关评估模型指标设定的基础上,德国高校发展中心将FIFTH项目发展为包含四大范系、涉及十六项指标的整体化评估模型。评估显示,德国应用技术大学在"第三使命"职能活动中表现积极,主要表现在:积极建设校内外科研网络与校企合作网络;主动参与区域事务;高度重视科学技术转让、学生深入参与科研等。

面向高阶调制的5G宽带射频功放数字预失真技术

在第5代无线通信系统(5G)中,射频(RF)功放(PAs)有着严重的非线性失真和强记忆效应,尤其是对于采用复杂的高阶调制系统,如16QAM、64QAM等。为了研究和提高宽带RF PAs的线性化能力,提出基于先进设计系统(advanced design system,ADS)设计的宽带RF PAs,工作的中心频率为3.55 GHz,采用记忆多项式(MP)模型构建数字预失真器,模型的归一化均方误差(NMSE)指标可达-33.28 d B。最后,采用带宽为100 MHz的16QAM或64QAM高阶调制的5G新空口(new radio,NR)信号,信号最大幅度值为9.899 d B,对中心频率为3.55 GHz的RF PAs进行预失真仿真验证。仿真结果表明,在16QAM调制方式下,邻信道功率比(ACPR)可分别改善20.13 dB和20.05 dB;在64QAM调制方式下,ACPR可分别改善18.35 dB和19.08 dB。实验测试结果表明,在16QAM调制方式下,ACPR分别改善15.81 dB和16.40 dB;在64QAM调制方式下,ACPR分别改善15.44 dB和15.82 dB。说明基于MP的数字预失真器对基于ADS的RF PAs的非线性具有明显的抑制作用。因此基于MP模型的数字预失真器可用于所提RF PAs的线性化,且采用16QAM调制方式比基于64QAM调制方式的预失真能力更强。

Radio Propagation and Wireless Coverage of LSAA-Based 5G Millimeter-Wave Mobile Communication Systems

Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell radii and complicated network architectures. A coverage extension scheme using large-scale antenna arrays(LSAAs) has been suggested and theoretically proven to be cost-efficient in combination with ultradense small cell networks. To analyze and optimize the LSAA-based network deployments, a comprehensive survey of recent advances in statistical mmWave channel modeling is first presented in terms of channel parameter estimation, large-scale path loss models, and small-scale cluster models. Next, the measurement and modeling results at two 5G candidate mmWave bands(e.g., 28 GHz and 39 GHz) are reviewed and compared in several outdoor scenarios of interest, where the propagation characteristics make crucial contributions to wireless network designs. Finally, the coverage behaviors of systems employing a large number of antenna arrays are discussed, as well as some implications on future mmWave cellular network designs.

Fifth metatarsal fractures and current treatment

Metatarsal fractures are one of the most common injuries of the foot. There has been conflicting literatureon management of fifth metatarsal fractures due to inconsistency with respect to classification of these fractures. This article provides a thorough review of fifth metatarsal fractures with examination of relevant literature to describe the management of fifth metatarsal fractures especially the proximal fracture. A description of nonoperative and operative management for fifth metatarsal fractures according to anatomical region is provided.

Discrete Singular Convolution Method for Numerical Solutions of Fifth Order Korteweg-De Vries Equations

A new computational method for solving the fifth order Korteweg-de Vries (fKdV) equation is proposed. The nonlinear partial differential equation is discretized in space using the discrete singular convolution (DSC) scheme and an exponential time integration scheme combined with the best rational approximations based on the Carathéodory-Fejér procedure for time discretization. We check several numerical results of our approach against available analytical solutions. In addition, we computed the conservation laws of the fKdV equation. We find that the DSC approach is a very accurate, efficient and reliable method for solving nonlinear partial differential equations.

Jones type fifth metatarsal fracture fixation in athletes:A review and current concept

Jones type fifth metatarsal fracture is a common occurrence among athletes at all levels.These fractures may occur due to several mechanisms,but inversions and twisting injuries are considered some of the leading causes in sports.However,while Jones fracture incidences are frequent in the sporting world,there is still a lack of consensus on how such fractures should be effectively managed.There are numerous treatment options for patients with fifth metatarsal Jones fractures.The role of nonoperative treatment remains controversial,with concerns about delayed union and nonunion.Surgical stabilization of metatarsal Jones fractures is therefore often recommended for athletes,as it is often associated with a low number of complications and a higher rate of union than nonoperative management.This review will focus on literature regarding the prevalence of Jones type fifth metatarsal fracture,alongside the efficacy of both conservative and surgical treatment within this population.

Existing fixation modalities for Jones type fifth metatarsal fracture fixation pose high rates of complications and nonunion

Jones type fifth metatarsal fractures pose a challenge to the foot and ankle surgeon,given documented high nonunion rates as well as high complication rates including hardware prominence,nerve injury,and screw breakage for existing treatment modalities including screw and plantar plate fixation.We call for the design of innovative Jones-fracture specific implants which contour to the natural curve of the fifth metatarsal.Future research should aim to expand upon existing literature for Jones fracture fixation and evaluate efficacy of novel implants which are designed to address unacceptably high complication rates for existing treatment modalities.

Solar System. Angular Momentum. New Physics

The most widely accepted model of Solar System formation, known as the Nebular hypothesis, does not solve the Angular Momentum problem—why is the orbital momentum of Jupiter larger than rotational momentum of the Sun? The present manuscript introduces a Rotational Fission model of creation and evolution of Macrostructures of the World (Superclusters, Galaxies, Extrasolar Systems), based on Overspinning Cores of the World’s Macroobjects, and the Law of Conservation of Angular Momentum. The Hypersphere World-Universe model is the only cosmological model in existence that is consistent with this Fundamental Law.

Research on Open-circuit Fault Tolerant Control of Six-phase Permanent Magnet Synchronous Machine Based on Fifth Harmonic Current Injection

This paper proposes a novel control approach for fault-tolerant control of dual three-phase permanent magnet synchronous motor(PMSM) under one-phase open-circuit fault.A modified six-phase static coordinate transformation matrix and an extended rotating coordinate transformation matrix are investigated considering the influence of the fifth harmonic space on fault-tolerant control. These mathematical models are further analyzed in the fundamental space and the fifth harmonic space after the fault and to eliminate the coupling between the d-q axis voltage equation in the fundamental wave space and the d-q axis voltage equation in the fifth harmonic space, a secondary rotation coordinate transformation matrix is proposed. To achieve the purpose of reducing torque ripple, the fault-tolerant control method proposed in this paper not only takes the minimum copper loss as the constraint condition, but also injects the fifth harmonic current. The experimental result of current and torque is used to verify the accuracy of fault-tolerant control.

Applications-Some Influences of Engineering Ideas on Biology Being the fifth in a series of essays on the materials of nature

Ideas from engineering have helped the understanding of biological organisms for thousands of years. However, the mechanical aspects of biological materials and structures can, if properly interpreted and analysed, lead to a deeper understanding of the biology of organisms. Such an approach, although always current in some form, is nevertheless subject to the vagaries of fashion and the availability of analytical techniques. At present we are in a period of upturn. Areas of interest are deployable structures （applications in aerospace）, palaeontology （how little do we need to know in order to create a credible biosphere） and food science （we need a rational approach to the mechanics of food）.

Analytical and Traveling Wave Solutions to the Fifth Order Standard Sawada-Kotera Equation via the Generalized exp(-Φ(ξ))-Expansion Method

In this article, we propose a generalized exp(-Φ(ξ))-expansion method and successfully implement it to find exact traveling wave solutions to the fifth order standard Sawada-Kotera (SK) equation. The exact traveling wave solutions are established in the form of trigonometric, hyperbolic, exponential and rational functions with some free parameters. It is shown that this method is standard, effective and easily applicable mathematical tool for solving nonlinear partial differential equations arises in the field of mathematical physics and engineering.