To improve the prediction accuracy of traffic flow, a travel time model based on gradient boosting decision tree (GBDT) is proposed. In order to test applicability GBDT, models with different horizons (5 min ahead, 10 and 15 ahead) are established. The 11 variables viewed as candidates in this paper. Different from other machine learning algorithms black boxes, GBDT can provide interpretable results through variable importance. proposed model, importance shows that for horizons, most...

Input-parallel output-parallel (IPOP)-connected converter systems allow the use of low-power modules for high-power applications. An IPOP topology with half-wave, daisy chain-connected rectifiers is presented which consists multiple half-bridge (HB) dc-dc modules. By utilizing a common-duty-ratio control scheme, without dedicated current-sharing controller, automatic sharing input current and load in achieved even presence differences more than 10% various module parameters. The steady-state...

Dynamic path optimization is an important part of intelligent transportation systems (ITSs). Aiming at the shortcomings current dynamic method, improved ant colony algorithm was used to optimize path. Through actual investigation and analysis, influencing factors multiobjective planning model were determined. The by using analytic hierarchy process (AHP) transform length, travel time, traffic flow into comprehensive weight-influencing factor. Meanwhile, directional guidance introduced...

In this paper, a comprehensive analysis of merging behavior on the freeway under different traffic densities has been conducted. First, influence density parameters (namely position, speed, duration, and accepted gap) was analyzed by mathematical statistics, Mann-Whitney-U Test, distribution fitting. It found that gap are all significantly influenced best-fitted distributions could be densities. Then, to incorporate dynamic effects behavior, cell-based introduced in paper logistic regression...

This paper aims to model the behavior of merging acceleration/deceleration when cars are running in a congested weaving section on freeway during implementation period by using data-driven method called gradient-boosting decision tree (GBDT). Different from other black-box machine learning techniques, GBDT can provide abundant information about nonlinear effects for independent variables drawing partial effects. Noise-filtered vehicle trajectory data collected US Highway 101 investigated...

Input-parallel output-parallel (IPOP) connected converters allow the use of low-current and low-power converter modules for high-power applications. In this paper, an IPOP topology is proposed, which consists two half-bridge by applying interleaving connection in rectifier diodes. Moreover, without a dedicated current-sharing controller, proposed system can achieve equal sharing input current or/and load current. Both operation analysis scheme are analyzed system. addition, it concluded that...

Travel time of traffic flow is the basis guidance. To improve estimation accuracy, a travel model based on Random Forests proposed. 7 influence variables are viewed as candidates in this paper. Data obtained from VISSIM simulation used to verify model. Different other machine learning algorithm black boxes, can provide interpretable results through variable importance. The result importance shows that mean floating car <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Individual vehicle travel time is the premise of in traffic flow, which basis prediction and route guidance. Aiming at shortcomings current methods, a method based on piecewise cubic Hermite interpolation polynomial used to estimate an individual vehicle. Data obtained from field experiments according different states (free-flow, transition, congestion) verify model. The results show that accuracy better than linear spline method. proposed can simulate complex running state produce more...

9668 Background: Human Fibroblast Activation Protein (FAP)/seprase is a 97-kd surface glycoprotein with dipeptidyl peptidase and gelatinolytic activity expressed on tumor associated fibroblasts in the majority of epithelial cancers including colon adenocarcinomas. FAP overexpression has been shown to promote growth animal models, clinical trials targeting enzymatic have initiated. The primary objective this study was evaluate expression levels human by immunohistochemisty relate its outcome....

This paper applied MapInfo, the professional soft ware tool of GIS, integrated secondary exploiture combining with elctronic maps, and made use flat roof Visual C++ as visualize development, transferred MapX, a control them. The designed Inquiry System in Intelligent Transportation, which including query system road information, bus district information. It can be carried out space analysis function based on GIS. Adopted SQL Server manage attribute data, by data binding, victor picture were combined.

Osteoporosis gives rise to fragile bones that have higher fracture risks due diminished bone mass and altered microarchitecture [1]. Mechanical loading mediated adaptation has demonstrated promising potentials as a non-pharmacological alteration for both osteogenic response attenuation of osteopenia [2]. Intramedullary pressure (ImP) been proposed key factor fluid flow initiation mechanotransductive signal inductions in bone. It is also suggested integration strain signals over time allows...

Bone loss is a critical health problem of astronauts in long-term space missions. A growing number evidence has pointed out bone fluid flow as regulator mechanotransductive signaling and adaptation. Intramedullary pressure (ImP) key mediator for initiation it influences the osteogenic signals within skeleton. The potential ImP-induced then triggers adaptation [1]. Previous vivo study demonstrated that ImP induced by oscillatory electrical stimulations can effectively mitigate disuse...

Power semiconductor devices and its control circuit in inverter of motor speed regulation system is the weak link most likely occurs fault. Fault feature extraction key to fault diagnosis.Regarding inverter’s output voltage signal as characteristic parameters,extracting spectrum by using improved windowed STFT,fault detection diagnosis can be achieved.Simulation results demonstrate effectiveness this method

Osteoporosis is a skeletal disease resulting in diminished bone mass and altered microstructure, which leads to more fragile bones that have higher risk of fractures[1]. Approximately 44 million people been diagnosed for osteoporosis nationwide[2]. It also causes nearly 1.5 fractures annually. In order prevent from such loss enhance quality, effective clinical treatments, e.g. using non-pharmacological approach, are great need.

Mechanotransduction has demonstrated potentials for tissue adaptation in vivo and vitro. It is well documented that ultrasound, as a mechanical signal, can produce wide variety of biological effects vitro vivo[1]. For example, pulsed ultrasound be used to accelerate the rate bone fracture healing noninvasively. Although range studies have been done, mechanism this therapeutic effect on currently unknown still under active investigation. In our previous studies, we developed methodology...

This paper studies the development of novel, non-invasive external dynamic hydraulic pressure muscle stimulation for bone quality enhancement, and evaluation effects this on strength to further delineate fluid flow mechanism. Trabecular structure proximal metaphysis right tibia is scanned using ¿CT, porosity whole bones are evaluated NMR analysis. Results show that an exciting intervention be applied externally noninvasively, as a novel treatment improve structural quality. And it also has...

Fault prediction is a challenging problem of complex system. Furthermore, fault plays critical role in aircraft engines and the performance their control systems. Using robustness analysis parametric uncertain systems, an improved algorithm proposed for massive data. The takes uncertainties into consideration which can distinguish actual from model uncertainties. Application to engine clearly illustrates method, results show that method helps system accommodate reduce false alarms missed detection.