Hydrogen as a clean fuel will play a critical role in the future energy landscape. The hydrogen production reaction of electrolytic water only produces hydrogen and oxygen, which has the advantages of low cost, high efficiency, environmental friendliness and good safety. The oxygen evolution reaction is a key ratecontrolled reaction step in hydrogen production from electrolytic water. A simple Pt loaded Li ₂Co ₂O ₄ synthesis method was introduced and its oxygen evolution performance was characterized. The effects of different Pt loading (mass fraction) on the electrocatalytic performance were compared, and the optimum Pt loading was obtained when the Pt loading was 5%. The structure of the material was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that a highly efficient catalyst capable of reducing the Pt consumption while maintaining the activity and durability of the catalyst is obtained.

Based on the traditional electronic commerce recommendation system, these technology means such as distributed computing, publish/subscribe based on the semantic，and ontology were introduced. The personalized electronic commerce recommendation model architecture was designed. The film areas ontology was constructed, which was implemented by Protégé 3.3.1 ontology model tool. The architecture core algorithms were described in detail, which are the clustering algorithm of users characteristics and the match algorithm of publish/subscribe based on the semantic. The experimental results show that the personalized recommendation system based on publish/subscribe has a good recommendation accuracy.

Spherical tank is more important equipment for stored or packing of gases, liquids and other media of the petrochemical. Its reliability is an important index for security. The concept of reliability analysis was explained. By using finite element software, the reliability of spherical tank and parameter sensitivity was analyzed and evaluated. Parameters' reliability and sensitivity can visually reflects influence of normal distribution design parameters on the reliability and provide scientific reference for reliability design of spherical strength.

In the production of hazardous chemicals present through the use or process of enterprises and institutions to investigate, determined the focus of prevention in Fushun City, and established a spatial database of dangerous goods and hazardous source spatial database. The environmental mathematical model was integrated into the geographic information systems, the use of geographic information system software MapObject and programming software Visual Basic 6.0, established Fushun unexpected environmental pollution emergency information. The system can simulate the migration of pollution diffusion process group to predict pollutant concentration and time of arrival, location in the event of accident quickly and easily in the event of accident, warning information timely in order to start the plan, prevent and mitigate the losses caused by pollution.

 

 

Using finite element method, the nonlinear contact between a rigid punch and a elastic half plane was analyzed. Through modeling and computing with ANSYS, the value of J-integral around the edge of the punch was obtained. The conservation of J-integral was certificated by series of data. And the contact stress intensity factor ( K _I) was gained through the relation between the J-integral and the  K _I. The results indicate that the  K _I by J-integral was in accord with the theoretical value. At last the KI of elastic plane with different thickness was calculated by the theory of J-integral.