NiCo₂O₄ arrays with two different morphologies were synthesized on nickel foam through a hydrothermal method followed by a calcination process. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) experiments were carried out to them respectively. Results show that the samples are pure NiCo₂O₄, cover fully on the surface of Ni foam and morphologies uniformity. Moreover, the electrochemical measurements indicate: the sample synthesized with hydrothermal solution ratio of alcohol to water is 1:6, exhibited an areal specific capacitance as high as 1.57 F/cm² at a current density of 3 mA/cm²; the sample synthesized with hydrothermal solution ratio of alcohol to water is 3:4, exhibited an areal specific capacitance as high as 1.28 F/ cm2 at a current density of 3 mA/cm². Furthermore, the sample synthesized in this paper shows robust rate capability.

This article discussed with 2, 2 '- methylene double (4 - methyl - 6 - tertiary butyl phenol) referred to as the antioxidants, （antioxidant 2246) reaction, propionyl chloride as raw materials, triethylamine as the bound acid agent, using dichloromethane as solvent, the direct synthesis of 2 - (2 - hydroxy - 3 - tert-butyl - 5 - methyl benzyl) - 4 - methyl - 6 - tert-butyl phenyl propionate (hereinafter referred to as antioxidant 3426) method.The effects of molar ratio n(antioxidant 2246):n(propionyl chloride), reaction time and reaction temperature on the yield were studied.The synthesis method is green and the solvent can be recycled, in line with the concept of green chemistry.

Furoin was synthesized by benzoin condensation reaction using furaldehyde as raw material, VB1 as catalyst and Na₂CO₃ as basic reagent. The effects of solvent ratio, amount of VB1 and alkali, reaction temperature and time were discussed, and the structure of condensation product was confirmed by melting point determination and IR spectroscopy. The experimental results show that the optimal condition was furaldehyde (10 mL, 0.12 mol), 95% ethanol (20 mL), VB1 (1.80 g), 10% Na₂CO₃ (8.0 mL), at 60 oC for 1.0 h, the best yield was upto 84.56%.

Effect on the dissolution rate and interactions between drug and excipients in the solid dispersions of gemfibrozil prepared by three methods. The dissolution rates of the drug in the solid dispersions have been increased significantly. The dissolution rates of the pure drug and the solid dispersions prepared by the solvent, freeze-drying and grinding method are 37.37%, 98.13%, 97.37% and 86.73% respectively during 2 hours. The characteristics of interactions between drug and carrier were analyzed by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). Gemfibrozil solid dispersion prepared by solvent method displays the most optimal properties.

The microwave-assisted extraction of seabuckthorn seed oil was studied. Based on the single factor experiment, the technology of microwave-assisted extraction of seabuckthorn seed oil was optimized by response surface method. The results showed that the best extraction conditions were: extraction time 26 min, ratio of material to liquid 1:12, power 622w. Under these conditions, the extraction rate of seabuckthorn seed oil was 0.307% ± 0.005%, which was 98.71% of the predicted value. It is basically consistent with the predicted value. This study optimized the microwave-assisted extraction technology of seabuckthorn seed oil, and provided the theoretical basis for the further development and utilization of seabuckthorn seed.

It is of great importance to use pneumatic conveying system in some special situations，According to the existing field condition,the new conveying system was designed.Taking advantage of negative pressure of the system and optimizing of coal-air flow in the tube.For example, the method of setting pressurizing wind in the pipeline and adding guide vane in the bend part can reduce the conveying resistance and improve the separation efficiency. At the same time, this design scheme can greatly reduce the use of labor force, to a certain extent, can reduce the risk of pollution environment, pulverized coal loss and dust explosion caused by manual operation.

The repair of the offshore platform jacket is an important research direction of ocean engineering, and the grouting clamp reinforcement and repair is the most widely used. In order to solve the hydrodynamic interference problem of grouting clamp under the combined action of wave and current in complex sea conditions, this paper uses Morison formula to analyze the linear wave load on the grouting clamp. Determine the wave force and sea flow force of the vertical and horizontal grouting clamps, and calculate the hydrodynamic load. When the grouting clamp is in the vertical state, the maximum wave load is 23341N and the maximum sea current is 8062.65N. Finally, using the press to carry out the anti-offload test of the clamp, it is verified that the slippage force of the grouting clamp is far greater than the wave load force received. The innovation can be summarized as a hydrodynamic comprehensive analysis of the grouting clamps in the vertical and horizontal directions. The feasibility of implementing the grouting clamp reinforcement method in the local damage repair operation of the offshore platform jacket was confirmed.

This treatise develops a sort of cleaning machine that can clean the swimming pool. This device has changed the former manual cleaning method and accomplished the cleaning operation of all types of swimming pools safer and more convenient. It adopts the negative pressure adsorption principle and RO membrane to prevent the water being polluted the second time. The maneuver of the posture under the water is accomplished by controlling the water quality of the floating box. The operator manipulates and cleans on the shore. It accomplishs the on line and all-round cleaning under the water. The treatise mainly introduces the working principles of the cleaning machine and designs its constructure and analyzes theoretically and calculates the working property of the device.

Aiming at the problems of traditional blackboard eraser, such as fugitive dust, incomplete wipe and poor use effect, etc. The article designed a negative pressure adsorption dustless blackboard eraser. The blackboard eraser is separated by a coarse filter net, with a compressed cavity inside. The negative pressure generated by fan drainage is used to absorb the dust generated by cleaning in real time. Through fluid simulation analysis and experimental test, the dust absorption rate can be more than 90%. At the same time, the blackboard eraser adopts wireless automatic charging, which has super-long standby performance.

Aiming at the problem of large changes in soil moisture and uncontrolled watering in different environments of potted flowers，we developed an intelligent flowering system with automatic watering and scientific regulation. Users use smart phone to set the planting information on the system. By monitoring environmental and soil moisture data, as well as combining with the characteristics database of different flower species to make decisions such as automatic watering control. Using multi-point data collection to fit data and optimize the soil water distribution, combine with the environmental information to provide scientific flower cultivation data for users.

In order to improve the efficiency of pineapple picking and reduce the labor intensity, the principle of pineapple picking was analyzed, and a small and efficient pineapple picking machine was designed. The V-shaped picking finger driven by electric motor can be used to pick pineapple from the plant, which can replace the manual work to complete the collection of pineapple quickly and improve the working efficiency of pineapple picking.

Aiming at the problem of numerical filtering in PLC control system, the basic working principle and mathematical model of RC filter circuit were studied. The method of continuous differential method was adopted to solve the differential equation mathematical model of RC filter circuit. The recurrence relation model of digital filter was deduced, and the numerical filtering program of PLC was programmed. Effectively overcoming the problem of signal instability caused by high frequency interference in the complex electromagnetic environment of the industrial field, good results had been achieved in the application of the actual control system.

Analyzed the water quality in Lake Luoma, the results indicate that its major contaminants are TN (total nitrogen), TP (total phosphorus) and volatile phenol. Based on the parameters of Chemical Oxygen Demand, Dissolved Oxygen and Chlorophyll a, the comprehensive trophic state index method are applied for assessing the eutrophication of Lake Luoma, and the results confirm that its water quality is heavy eutrophic. The water quality of Lake Luoma meets the level of Ⅳ to Ⅴ classification of surface water environmental quality standards. The nitrogen in the lake is sufficient, and the growth of algae is controlled by the phosphorus. Water eutrophication of the lake is phosphorus-controlled.

One-step preparation process using anhydrous magnesium chloride as carrier.The effects of ester-magnesium ratio, alcohol magnesium ratio, magnesium precursor composition, stirring and heating rate on Ziegler-Natta catalyst activity, polypropylene (PP) bulk density and isotacticity were investigated.The surface structure of the catalyst was investigated. The Ziegler-Natta catalyst system was optimized.The results showed that the comprehensive performance of Polypropylene was the best when the ratio of ester to magnesium was 0.255, the ratio of alcohol to magnesium was 2.6, the proper amount of ethoxy magnesium was added to the precursor,and the heating time was 4 h.

The method and technology of sensing, analyzing and detecting the biological macromolecules and drugs by biosensors is an important subject in biomedicine and materials science. The design and development of sensitive and easy-to-operate detection materials for biological macromolecules and drug molecules is a hotspot in this field in recent years. Due to the limitation of its structure or performance, it is difficult to meet the detection requirements by using a single material. It is a key basic subject to design and construct a material system with special structure by compounding two or more materials to obtain a composite drug detection system with excellent comprehensive performance. In this study, an intelligent biosensor based on carboxymethyl cellulose (CMC) and graphene oxide was investigated. The detection limit, detection range, selectivity and stability of the composite smart biosensor for vitamin B₆ were studied. The excellent performance of CMC as matrix material of biosensor was revealed.

In order to improve the portrayal of member images and strengthen the refined management of existing members, this paper proposes a method for depicting the members' portraits based on fuzzy clustering and RFM models. The model first uses the fuzzy C-means clustering algorithm to describe the purchasing power of members, and uses the RFM model to give the member life cycle and status division. Then, the activation rates of the inactive members in the member life cycle are calculated, so that the manager can fully understand the membership activation. Finally, the manager can arrange the promotion activities according to the member's preferences based on the associated rate.

As an important optimization problem, it is difficult to choose the initial point in the traditional algorithm. In this paper, the damped least square algorithm is introduced to improve the genetic algorithm. The results show that the improved genetic algorithm does not depend on the selection of initial points, and can improve the convergence efficiency and reduce the number of iterations.

The method to prepare PT anti-symmetric mediumu using standing wave and periodically modulated medium is disgussed. The influence of incident light angle on the transmittance and reflectivity of PT anti-symmetric medium is studied emphatically, which lays a foundation for further study on the optical application of PT anti-symmetric medium.

The paper discusses the state equation of regular linear systems and in special conditions the solution of the state equation is obtained. the paper analyzes the Lyapunov stability of the regular linear systems. Through the in-deep research on Lyapunov theorem a new method to construct Lyapunov function is found. The solution of the Lyapunov equation is very important too. The author finds a way to solve the Lyapunov equation of the continuous or discrete regular linear systems. This approach suits to make a program to solve the Lyapunov equation on the computer.

Composite electrolytes were prepared by doping carbonates (Li₂CO₃ 53 mol% and SrCO₃ 47mol%) with different mass fractions (10%, 20%, 30%) into electrolyte (GDC). The electrochemical properties of the composite electrolyte were characterized by conductivity test and scanning electron microscopy (SEM). Anode powder was prepared by doping composite electrolytes into NiO, and the cathode powder was obtained by compounding the composite electrolytes with Li-treated NiO.The anode, cathode and electrolyte prepared above were pressed by dry pressure method to obtain a single cell supported by the anode.  The performance of the cell was characterized later. The results of electrochemical performance of single cell show that GDC with 20% carbonate has the highest power density, which is 100mW/cm² at 650℃.

A design scheme of carrying mechanism applying 6-cable-driven parallel robot is proposed based on the actual requirements of the outside wall maintenance and cleaning of a high-rise building. The spatial parallelogram structure is adopted to construct the cable-loop, and 4 motors are used to drive 6 cables, which can achieve the movement requirements of the carrying mechanism in both horizontal and vertical directions. The kinematics model of cable-loop driven parallel robot is established. The law of length variation of 6 cables is analyzed. The research lays a theoretical foundation for achieving motion control of the cable-loop parallel robot.