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To solve the problem of getting different blowing speed of turbine motor after assembling turbine motor blower of fuze, do the analysis of free jet theory, and deduce the axis velocity formula on the basis of predecessor' research results. According to the theory of fluid mechanics, do the free jet simulation experiment of the round nozzle of constant diameter in the air, and get the data of the axis...
In this paper, we study a transmitter power limit low pass channel information and power transfer system for ammunition data link. A DC splitting architecture where a DC signal is used for power transfer and several OFDM subcarriers are used for information transfer is designed for the system. The DC and OFDM power allocation problem for maximizing the information transfer rate is proposed and constraints...
GPS map matching is the process to align observed GPS positions with road networks of a digital map. One of the key technique in a state-of-art GPS map matching algorithm is to select candidates for each observed GPS point. Traditional candidate selection algorithms focus on spatial proximity, which is not sufficient in real cases. This paper proposes a novel candidate selection algorithm for GPS...
The oxidized nitrogen species nitric oxide (NO), nitrogen dioxide (NO2) and nitrous oxide (N2O) play an important role in tropospheric and stratospheric chemistry. NO and NO2, collectively known as NOx, regulate the tropospheric photochemical production of ozone and the abundance of the hydroxyl radical (OH, the main oxidant of the atmosphere), whereas N2O influences stratospheric ozone chemistry...
Malware data are typically depicted with extremely high-dimensional features, which lays an excessive computational burden on detection methods. For the sake of effectiveness and efficiency, feature selection is an indispensable part for malware detection. In this paper, we propose an ensemble feature selection method with integration of discriminative and representative properties for malware detection...
Building models to predict analytics workloads' execution is a foundational capability that enables key scenarios for big data services, like SLA-driven service provisioning and elastic auto scaling. Given the various infrastructure and workload characteristics, it's more preferable to build the models in a "black-box" fashion, for example, by leveraging machine learning techniques. However,...
Emissions of the greenhouse gases N2O, CO2, and CH4 have increased in the past years. CH4 has a distinct contribution to global warming and climate change. Rice production plays an important role in CH4 emission. Thus, the rice fields in China should be considered in assessing CH4 emission. This study simulated CH4 emission in rice fields in China during the past 40 years (1971 to 2010) using the...
In this paper, we propose a new method to learn the regression coefficient matrix for multiple-output regression, which is inspired by multi-task learning. We attempt to incorporate high-order structure information among the regression coefficients into the estimated process of regression coefficient matrix, which is of great importance for multiple-output regression. Meanwhile, we also intend to...
A novel elastooptic stress multiplier is proposed and demonstrated in experiment that consists of two optical fiber polarizers and two cascaded high-birefringence polarization maintaining fibers. The stress multiplier can perform multiplying operation of two external forces or stresses applied to the two fibers, and can be also used as a voltage multiplier by combining with two piezoelectric transducers.
In this paper, we present a new method for facial age estimation based on ordinal discriminative feature learning. Considering the temporally ordinal and continuous characteristic of aging process, the proposed method not only aims at preserving the local manifold structure of facial images, but also it wants to keep the ordinal information among aging faces. Moreover, we try to remove redundant information...
This paper proposes a novel regression method based on distance metric learning for human age estimation. We take age estimation as a problem of distance-based ordinal regression, in which the facial aging trend can be discovered by a learned distance metric. Through the learned distance metric, we hope that both the ordinal information of different age groups and the local geometry structure of the...
This paper presents a method to estimate the workspace volume of a reduction robot and an optimization model is established to achieve a larger workspace. To calculate and compare the workspace volume under different structure parameters, a method is proposed to search the border of the workspace. This model shows the influence of the moving platform radius and the length of the legs on the workspace...
This paper investigates the input disturbance suppression problem for nonlinear Port-Controlled Hamiltonian (PCH) systems and presents a number of new results on the controllers design via the internal model approach. Different from the existing results on this topic we consider two cases: the case of the disturbance generated from a linear Hamiltonian system acts through a channel other than the...
Accepted models of power and information transmission channel in electromagnetic induction fuze setting systems are not accurate because the effects of eddy currents in the fuze body are not taken into account. This paper establishes an improved accuracy mathematical model that fully considers the influence of eddy currents on the system, and the model is consisted of mutual inductance model of isolated...
For the real-time information communication of fuze and fire control system, a wire link setting technology is adopted to realize the dual-direction quick transmission of information between setting system and fuze circuit. In order to reduce energy consumption of the fuze circuit during the information feedback process, a setting system loop is designed based on the load modulation technology with...
Rehabilitation Robot is a typical man-machine cooperation robot, which can drive the affected limbs to carry out various motor function recovery trainings within the same workspace of patients. To ensure the safety and comfort of the affected limbs during the training process, the system controller is designed based on the impedance control principle, thus the controller can make the robot has a certain...
A new type of horizontal lower limbs rehabilitation robot based on parallel mechanism is developed according to the motion law of lower limbs and rehabilitation medicine theory, which is helpful for the disabled patients in lower limbs. It can help patients to do rehabilitation training of hips, knees and ankles. In order to ensure safety and comfort of affected limb in the course of training, the...
We report a numerical study of the self-energy correction due to correlation effects from dynamic screening of the moving electron in silicon nanowire transistors. This many-body effect, which is not included in the usual Hartree approximation, is then incorporated self-consistently into a non-equilibrium Green's function (NEGF) code. The results pinpoint the importance of dielectric confinement whose...
Transition metal dichalcogenides MS2 (M = Mo, W, Nb, Ta) have the lamellar structures similar to graphite. They are often used as solid lubricants in high/low temperature, high load, vacuum, in which oil lubrication is failed. We have synthesized WS2 nanotubes with decomposition method using Al2O3 template. Moreover, chemical vapor transportation reaction is used to produce NbS2 nanotubes in evacuated...
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