Multi-stakeholder (e.g., governments, residents, the “3C” of community and “third party”) co-governance has become a hot topic in community-renewal research field. However, co-ordination various rights interests hinders multiple stakeholders, particularly China. Current on mechanisms remains inadequate. This article presents typical case multi-stakeholder for renewal with respect to adding elevators an apartment building Shanghai’s inner city. The process involved this differs from...

With the rapid development and gradual perfection of GNSS in recent years, improving real-time service performance has become a research hotspot. In single-point positioning, broadcast ephemeris is used to provide space–time reference. However, orbit parameters have meter-level errors, no mathematical model can simulate variation this, which restricts positioning accuracy GNSS. Based on this background, paper uses BP (Back Propagation) neural network PSO (Particle Swarm Optimization)–BP...

Global navigation satellite system (GNSS) provides users with all-weather, continuous, high-precision positioning, navigation, and timing (PNT) services. In the operation use of GNSS, influence space environment is a factor that must be considered. For example, during geomagnetic storms, series changes in Earth’s magnetosphere, ionosphere, upper atmosphere affect GNSS’s positioning performance. To investigate performance global systems this study selected three storm events occurred from...

The BeiDou Navigation Satellite System (BDS) has developed rapidly, and the combination of BDS Phase II (BDS-2) III (BDS-3) attracted wide attention. It is found that there are code ISBs between BDS-2 BDS-3, which may have a certain impact on BDS-3 combined positioning. This paper focuses performance BDS-2/BDS-3 B1I single-frequency pseudorange positioning investigates with without correction for different types receivers, include geodetic GNSS receivers low-cost receivers. results show...

Aiming at the current coal gangue recognition model's difficulty in recognizing aggregated targets, which leads to problems of misdetections, omissions, and inaccurate localization, we propose a method based on SFD-YOLOv5s model. The SE attention mechanism is improved incorporating maximum pooling introduced into backbone network YOLOv5s model improve ability extract critical feature information gangue. Furthermore, for introduce Focal-EIoU loss function Dyhead. experimental results show...

<p>Due to certainty recognition in ranking systems, the commonly included top 100 universities are regarded as Universally Acknowledged World-Class Universities (UAWCUs). From three university rankings-THEs, QS and ARWU from 2010 2015, following conclusions can be drawn this study: Firstly, 56 ranked by THEs, comparing with that of 47 2010; Secondly, comparison between 2015 reveals 44 these higher UAWCUs have kept on group any system. However, lower dropped out which replaced some...

According to poststructuralists, workers with higher level of education and possession potential experience are supposed have wages. Yet, there plausible questions that arise as what levels or work history needed for the enhancement wage discrimination. Additionally, outcomes arising from rehashing years schooling worth considering. We used a several methods, employing administrative Household Integrated Economic Survey (HIES) data Pakistan without ignoring environmental effects. Our...

In order to determine comprehensive heat transfer coefficient on the surface of rail in spray cooling process, secondary development front and back processing module by Python scripting language for ABAQUS. The scripts are written, curve experiment was used calculate coefficient. results show that script can realize function automatically creating model iterative calculation under ABAQUS environment. And time‐varying temperature which calculated using approximates experimental value.

The lime rotary kiln systems are widely used in the metallurgical industry, where combustion state is exceptionally complex, and it difficult to predict control calcined zone?s temperature. system uses entropy grey correlation model, combining operation process determine input output characteristics of model. Then, analyzes time lag inertia compensate for temperature prediction by using CNN-BILSTM-OC Correcting expected results with actual situation. experimental analysis shows that proposed...

Abstract BYSQ-2 is an amphibious spherical exploring robot which can move flexibly in water and on land, it has good pressure resistance perform a rotational motion with zero degree turn radius. But the actual experiment results show shortcoming of low maximum surge speed. The main objective this paper to improve speed alleviate heavy pendulum’s oscillation. Firstly, hydrodynamic coupling under different structural parameters propeller working states analyzed by using CFD method, influence...

Because of the advantage acoustic signal traveling in water, most techniques precisely locating AUVs adopt GPS and measurements. The development modern GNSS techniques, attitude measuring precise underwater ranging make GPS-acoustic technology possible for accurate localization an AUV. transmit angles are unknown transducers, it is complicated us to solve coordinates In order rapidly accurately obtain positions AUV at each epoch, this paper, algorithm absolute reference frame presented. It...

Compared with other underwater exploration robots, Spherical robot has an outstanding advantage for the exploration, whose spherical shell excellent resiliency to protect internal electronic components. In addition, this steering resistance is very small move flexibly. paper, a type of pendulums and propeller was studied on moving at water bottom in rolling manner. The structure force were analyzed understand that hydrodynamic force’s affection robot’s bottom. A mathematical model...

The finite time controller is proposed to solve the point stabilization problem for a novel underwater spherical roving robot (BYSQ-3) in two-dimensional space. design scheme new method; main advantage of this control that it can steer origin fast converging times without excessive effort. Firstly, physical prototype BYSQ-3 introduced and equations describing kinematics dynamics are established. Secondly, constructed based on backstepping explicit form more concise compared with other...

This paper addresses the point stabilization problem for underwater spherical roving robot (BYSQ-3) in horizontal plane. The finite-time stable control laws are adopted to steer origin fast, accurately and reliably. Firstly, inner structure operational principle of is described kinematic dynamic equations established. Secondly, diffeomorphism transformation change inputs introduced decouple multivariable coupling system into two subsystems. second subsystem consists double integrator...

Increased demand for improved aircraft performance and efficiency has led to consideration of structural weight reduction manufacturing cost savings opportunities early in the design cycle. SPANDSET is a toolkit developed facilitate these goals. By using lower fidelity classical analysis methods it able automate preliminary airplane wing box sizing at rapid speeds suitable space exploration. A case study illustrates how enables top-down previously existing small business jet structure...

The researches on the high efficient, safe and accurate measurement system of magnetic head pitch roll angles for HAA in HDD are relatively lack now. In this paper, perspective projection transformation object point reference image plane was expressed by using rotary tensor matrix, principle deviation angle between actual ideal derived. Thus, hardware with two sets two-dimensional platforms CCD camera measuring spatial established, based Wit7.0 toolkit Microsoft VB6.0 programming language,...

In terms of the trajectory tracking control spherical underwater vehicle, its movement is divided into horizontal and vertical movement. For movement, motion model built by transformation, law designed neural network backstepping method. Simulation results experiment verify effectiveness law. The linear keeping method for according to gyroscope approximation theory. Repeated experiments that vehicle's high-speed rotation on long axis can effectively weaken course shift which caused flow interference.

Abstract The pendulum spherical underwater vehicle can realize the ascending and descending motion in water by using internal pitch central propeller. It is frequent swing of that causes fluctuation speed robot reduces stability system. A two-stage sliding method proposed for driving characteristics it control angle at same time. neural network introduced to compensate interference items adaptively. designed controller proved theory. simulation experimental results show rapid frequency...

In order to get precise synthetical heat transfer coefficients, the surface coefficients on rail are calculated respectively by Two-point method, Three-point method and Whole during spraying process, taken into calculation model cooling curve compare with experimental value.The got from coefficient is close value in line actual situation