Search results

Fig. 1 Control chart of an AC servo system In Figure 1, the dotted line is the control chart of an AC speed control system; is the target position; is the actual target position; as the control voltage; is the amplifier gain; R is the loop resistance of motor armature; L is the loop inductance of motor armature; is the motor torque coefficient; is the motor electromagnetic torque; is the back-Electromotive Force of motor armature; is the back- Electromotive Force coefficient of motor; is the load disturbance torque; is the friction torque disturbance; J is the total inertia moment converted to the rotor; is the viscous friction coefficient; is the angular velocity of motor; is the reduction ratio.
The input signal is the control voltage signal from -5V to 5V, collection is conducted every, and a total of 1,000 sets of data are collected.
Fig. 3 The input control voltage signal Fig. 4 The output data In order to test the performance of wavelet neural network better, this article uses Root Mean Square Error (RMS) and the signal Variance Accounted For (VAF) to measure the accuracy of the model and the similarity between the model and the actual system.

Introduction The effectiveness of dye-sensitized was found in 1910, mostly focused on finding a possible photosensitizing oxidation - reduction reaction [1].
Fig. 5 illustrates the monitoring data of acetone concentrations under light wavelength of 420 nm, achieved by the continuous dye/TiO2 thin films reactor, with the irradiation intensity of 1 mW cm-2 at the flow rate of 0.5 L min-1.
Fig. 5 PID continuous monitoring data of the acetone concentrations under light wavelength of 420 nm Conclusions This work clarifies the photosensitization behavior of anatase TiO2 and dye/TiO2 thin film exposed to visible light sources.

Milling resulted in a significant reduction of grain size.
The structure parameters, i.e. the average grain sizes of Cr and Al2O3 in Fig.3 obtained from X-ray data in Fig.4 by Suryanarayana and Grant Norton's formula, are 278 nm and 50 nm, respectively and the Al2O3 and Cr particles are well distributed in matrix, ascertained by BSE image of shown in Fig. 3.
[9] http://en.wikipedia.org/wiki/Elastic properties of the elements (data page) Fig. 4.

The characteristics data in Fig. 4 and 5 is the basis of performance analysis of SRM.
With these data, one can built simulation model in MATLAB by nonlinear mapping technique, such as neural network, and then many control methods can be simulated.
It’s clear that the amplitude of current and torque can be increased allow with the reduction of turn on angle.

The first sets of trials were aimed at achieving model equations with good fit and minimal deviation from the data points (SCFs).
The regression analysis was then performed with the refined data.
SCFA-CRi = - 9.518 - 3.273β - 19.619Ω + 12.240exp (Ω) - 0.0321γ2 + 1.86βγ + 14.892βΩ + 0.368γΩ - 2.879βγΩ (1) SCFA-BCc = 72.9 - 62β + 19.5γ - 2.60Ω + 34β2.4 - 35.9γ0.85 + 3.37Ω2 - 49.6γ-1β-1 +6.90γ-1β-2 + 8.8βγ0.85 - 7.0β2.4γ0.85 + 5.35γ0.65 β12.5exp-(γ - 10) (2) SCFA-CBs = 3.50 - 2.11Ω + 1.88Ω2 - 12.6 β1.2γ-1 + 0.0262(β-1.2γ) exp (β1.2γ-1) (3) SCFB-CRe = 0.798 - 5.056β - 0.207γ + 0.185Ω + 1.405βγ (4) SCFB-CBi = - 0.972 + 2.81β + 0.443γ - 0.213Ω - 0.811γβ2 - 0.0168γβ-2 (5) The equations above are valid for the entire range of non-dimensional parameters investigated i.e. 0.3 ≤ β ≤ 0.54, 4.62 ≤ γ ≤ 10, 0.167 ≤ Ω ≤ 0.467 It was impossible to fit a good quality equation to the entire database for SCFB-BCc hence a reduction in the validity range was imposed for this location.

Results and Discussion The data on determining the effect of water-swelling agents on the kinetics of rubber vulcanization are presented in the form of rheometric graphs in figure 1.
The comparative data on the change of the conditional nominal tensile strength are presented below (Fig.4) and nominal elongation at break (Fig.5) of rubbers after 14 days of contact with fluids.
Comparative values of change of nominal elongation at break of rubber samples before and after 14 days of exposure in fluids: 1 - without water-swelling reagent; 2 - high-molecular partially hydrolyzed polyacrylamide; 3 - copolymer of acrylamide with potassium acrylate; 4 - high-molecular partially hydrolyzed polyacrylamide + sodium-carboxymethyl cellulose; 5 - copolymer of acrylamide with potassium acrylate + sodium-carboxymethyl cellulose Conclusions The results shown in the histograms (figures 4 and 5) demonstrate the level of reduction of the elastic-strength properties of the samples, modified by the additives of water-swelling agents.

Data in the tables demonstrates that mechanical properties of drill pipe meets API Specification 5DP standard requirement and hardness of the whole section has no serious difference.
Data in the table demonstrates that No-metal inclusion of drill pipe meets SY/T5561 standard requirement[2].
The reduction in tensile capacity of the drill pipe cannot be predicted because there is no method for predicting thedownhole temperature of the drill pipe at present, so its difficult to prevent such failure.

The fatigue data were discussed based on the linear notch mechanics which was proposed recently by one of authors.
The fatigue data were discussed based on the linear notch mechanics, and the effectiveness of linear notch mechanics was confirmed through the results.
The TABLE 1: CHEMICAL COMPOSION [%] C Si Mn P Cu Ni Cr 0.43 0.19 0.02 0.024 0.01 0.02 0.12 TABLE 2: MECHANICAL PROPERTIES Heat treatment ǻsl ǻB ǻT Ȁ 845͠ 1hrψF.C. 317 572 993 50.3 ǻsl : Lower yield stress [MPa] ǻB : Ultimate tensile strength [MPa] ǻT : True fracture strength [MPa] Ȁ : Reduction of area [%] diameter d of the specimen is 10 or 6mm, and the notches are of the circumferential 60qV-shaped type.

Depth (µm) 5 10 20 40 D (nm) 32±3 36±4 46±6 >1000 Table 1 shows the average grain size of the surface layers calculated from the XRD data for the samples being treated for 60, 90 and 180 min, respectively.
After HESP treatment, the mean positron lifetime, �av, shows a sharp reduction about 40~50 µm from the surface.
In this experiment, three-lifetime fitting was adopted in the analysis of measurement data.

In order to meet the reality of China's national conditions, many automobile manufacturers and R & D department has find a suitable for China's national conditions of the diesel engine emission control technology---- selective catalytic reduction (SCR) technology, this technology can effectively overcome the influence of sulfur content in diesel oil, thus favored.
Figure 1 The situation of NOx concentration in original diesel emission experiment Based on the measured data of each condition test (NOx emission value, gas flow, fuel consumption and exhaust temperature), we can obtain the calculation value of NOx emission is 6.24g/(kw.h) after calculation of standard method.
(5) The molar volume of the gas is V=22.4 L/mol = 0.0224 m3/mol under standard conditions, then the molar flow of NOx in unit time (unit: mol/h) can obtained: (6) Calculation of theoretical urea aqueous solution demand shows that per mole NOx consumes 0.0845 L urea aqueous solution, therefore, demand for urea solution, namely urea supply flow (unit: L/h) QL=0.0845/QM (7) Put the test data measured into formula (1) ~ formula (7), we can obtain theoretical urea solution demand for remove NOx completely under ESC different conditions as shown in table 1.