Ni/Al⁃LDHs/rGO composites with various GO contents (0, 0.2%, 0.5%, 0.8% and 1.0%) were prepared by a facile homogeneous precipitation method with Ni(NO3)2·6H2O, Al(NO3)3·9H2O, urea, and GO as raw materials. The microstructure and surface morphology of the prepared samples were characterized by XRD, FT⁃IR, TGA, and FESEM; the electrochemical properties of the samples as anode materials for Ni⁃MH battery were studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge⁃discharge tests. The results demonstrated that the electrochemical performance of Ni/Al⁃LDHs can be significantly improved by incorporating rGO. Among the five samples, the Ni/Al⁃LDHs/rGO composite with GO content of 0.8% exhibited the most excellent comprehensive electrochemical performance.For example, at the high current density of 2 000 mA/g, it still delivered a specific discharge capacity of 288 mA·h/g, which is 40.5% higher than that (205 mA·h/g) of the pure Ni/Al⁃LDHs sample.

In order to effectively develop deep reservoirs, the selection of pumps in deep pumping technology is a difficult problem for Tahe oilfield. The optimization of deep pump should avoid the problems of large oil bar load, low pump efficiency, short pump detection period and high difficulty of deep well pumping, etc. By investigating the field application of the pump, the characteristics and parameters of the oil recovery work of five common deep pumpes were analyzed and compared. As a result, the deep pumping with side⁃flow loading pumps has the advantage of reducing the load on the sucker rod string. The actual pump depth of deep pumping with bi⁃lamellar pump is the largest. Deep pumping with self⁃compensating pump can reduce pump leakage, prevent sand sticking and prolong the life of deep pump.The oil pump of hydraulic feedback can solve effectively the problem of downward of rod string.The electric submersible pump and rod pump combination can significantly improve pump efficiency. The article provides some reference to the selection of mechanical production mode for other deep wells or the wells with insufficient fluid supply at the bottom of the wells.

In order to improve the accuracy of leakage volume calculation of product oil pipelines, the error analysis of the input parameters used to calculate the leakage volume of product oil pipelines is carried out, including the time lag error of the pipeline operation data, the numerical error of the pipeline inner diameter and the numerical error of the oil physical properties. Through the sensitivity analysis of the input parameters, it is found that the leakage volume is the least sensitive to flow rate. The variation rate of pipeline leakage is positively correlated with time lag rate, pressure change rate and inner diameter change rate, while it is negatively correlated with flowrate change rate. The sensitivity of pipeline leakage volume to each input parameter is different within the range of variation rate of parameters.

The main contribution is to present stability analysis criterion for a type of norm⁃bounded uncertain perturbed discrete systems(NUPDS) with its states is subjected to a novel ellipsoidal outer approximation,which is different from the traditional bound description of general state. Based on the Lyapunov method, a delay dependent criterion and the corresponding state feedback control law, which are expressed in terms of linear matrix inequalities(LMIs) technology, are proposed to guarantee the asymptotic stability for the perturb delay systems. The solution of the LMIs can be obtained easily using existing efficient convex optimization techniques. A numerical example is given to illustrate effectiveness of the proposed method.

Combining fuzzy soft sets and both-brank fuzzy sets theory, the definition of double both-brank fuzzy soft sets are given. The both-brank fuzzy soft subset is further defined, and both-brank fuzzy soft sets are equal. The operations of intersection, union and complement of both-brank fuzzy soft sets are specified. Several properties of these operations have been studied.The both-brank fuzzy soft set is a brand new concept, and there are many places worth studying.

It is difficult to predict the accuracy of the river by using the conventional seismic attributes, due to the complex conditions of the terrigenous clastic basin reservoirs and the rapid change of the rock facies. In this paper, XII7-12 layer in N area of S oilfield is taken as an example. Through the seismic forward analysis, the seismic section reflection characteristics of different types of reservoirs are different, and the seismic attributes of the combined layer can be used as the effective dimension for the main channel prediction in this area. On this basis, using the method of the combination of Gray Relational Analysis and Support Vector Machine, the N zone seismic attribute prediction based on Gray Relational Support Vector Machine is completed. Drilling confirmed that based on Gray Correlation and Support Vector Machine attribute prediction, the drilling coincidence rate is higher. By using the advantage of seismic inversion to predict the boundary of the channel sand, the comprehensive analysis of dynamic and static data of the polymer flooding well group effectively solved the contradiction between the injection and production system of the XII7-12 strata system in the N area of the S oilfield, thus, it further confirms the accuracy of attribute prediction based on GRA-SVM. Comprehensive research shows that this method is suitable for high accuracy of the river prediction and can be used as a better river prediction method under complex geological conditions.

According to the characteristics of air quality monitoring data, a clustering algorithm of multiple data streams based on synchronous correlation is presented. On the basis of the national environmental quality standards and the actual monitoring data, the air quality is evaluated and the correlation about the air pollution index is analysed. The result shows that the application of multi data stream clustering based on the synchronous correlation is feasible.

 

Liaohe Oilfield TESHI pipeline for Thermal oil undertake a significant transportation task, to prevent corrosion is the primary means of protection for the pipeline. Cathode protection of buried pipelines is one of the best corrosion-proof methods. So far, the main way of evaluating and measuring cathode protection is potential measurement. Using specimens are able to be more convenient to measure the potential, the corrosion rate and protection level under cathode protection were obtained by the methods of polarization and potential decline measurement, which is beneficial to monitor and control real-time cathode protection. 

 

 

 

Different effects to the shear bond strength of epoxy adhesive coating in several surface treatment methods were studied in the experiments where mechanical processing, acid pickling, cold parkerizing process and coupling treatment methods were used. According to the experimental data, the relationship curve between the surface roughness and shear bond strength of epoxy adhesive coating was mapped, and a detailed theoretical analysis after comparing the test results was made. The results show that the two methods of cold parkerizing process and coupling treatment can improve the shear bond strength of epoxy adhesive coating significantly.

A series of alkylpyridine compounds were synthesized from aldehyde and ammonia water catalyzed by solid super acid heterogeneously under normal pressure in the fixed bed. Effects of the reaction temperature, feeding speed and molecular ratio of aldehyde to ammonia water on the product types and their yields were investigated. The results show that there are three products, 2-methylpyridine, 4-methylpyridine and 2-methyl -5-ethylpyridine. Under the following conditions: the feeding rate of 0.2 mL/min, reaction temperature of 300 ℃ and molecular ratio of aldehyde and ammonia water 3∶4, the yield of alkylpyridine compounds achieves the highest (60.16%), and the by-products are alkylbenzene compounds.

Based on the sample of 51 listed enterprises which finished split share reform, the effect on the top manager’s incentive and performance of listed enterprises was investigated, which utilizes factor analysis method to synthesize ROE，ROA，EPS，IPOS，IROE as performance of listed enterprises' scores and uses regression analysis to verify the relationship between the top manager’s incentive and performance of listed enterprises by SPSS15.0 statistics analysis software. The results show that the reform of split share structure improves the structure of company, the top manager's incentive mechanism takes active effect and improves performance of listed enterprises. The effect of share incentive is better than salary incentive.

First, two mistakes about the Minkowski inequality of [WTHX]H[WTBZ]-matrix were pointed by practical examples and reason of the mistakes was found on a view of theory analysis. On the base, some necessary conditions were improved and Minkowski inequality was further modified by considering [WTHX]H[WTBZ]-matrix properties, using eigenvalues’ distribution, inequality’s calculation and other methods，and the corresponding results were generalized. Second, another important inequality of [WTHX]H[WTBZ]-matrix was also generalized by the analysis of the Minkowski inequality. The modify and generalization not only offer supports to the [WTHX]H[WTBZ]-matrix theory itself, but also do good to development of biology, computers and mathematics and other related fields.

The concepts of local (α,β)-diagonally dominant matrix were introduced. Under the condition of local (α,β)-diagonally dominant matrix with a nonzero elements chain, by constructing a positive diagonal matrix [WTHX]X[WTBZ], the conclusion that [WTHX]B=AX[WTBZ] was α-diagonally dominant matrix with a nonzero elements chain was presented, and a criterion for nonsingular [WTHX]H[WTBZ]-matrix was obtained. The outcome implies that the extended local (α,β)-diagonally dominant concept is a development for matrix's diagonally dominance's theory, and a strong tool for researching [WTHX]H[WTBZ]-matrix and [WTHX]M[WTBZ]-matrix.

It is required that conventional instrument control system should be rebuilt in the atmospheric-vacuum distillation unit in the petrochemical enterprise. Current situation in communication signal category between all kinds of sensors and input devices in the control room was described. Adapting to development that computer control technique is widely used to automation system of petrochemical enterprises, industrial IT Freelance 2000 DCS was adopted to implement production process’ automation controlling of the atmospheric-vacuum distillation unit. According to practical needs of units and safety and stabilization requests of system, DCS’s software and hardware frame were determined. A configuration control plan, which advanced computer control algorithm was applied to the typical control loop of the unit, was described. Finally, installation request for DCS was given. The system can reduce error and promote control precision.