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An innovative combined cooling and power generation system is designed employing the flash-binary geothermal system. In the proposed plant, an internal combination of dual-pressure organic Rankine cycle and ejector refrigeration cycle is employed as the binary subsystem in the flash-binary plant. Another positive aspect of the proposed system is the profiting of zeotropic mixtures advantages in the binary unit. The feasibility of the proposed system is analyzed from the energy, exergy, and exergoeconomic viewpoints. Then, the robust Non-Dominated Sorting Genetic Algorithm II optimizer and linear programming technique for multi-dimensional analysis of preference decision-making technique are employed to optimize the proposed plant’s performance. The optimized values in the power-cost scenario are obtained for the mass fraction of 0.474 with the values of 1.745 MW , 232.92 kW , 18.23 % , 54.84 % , and 12.13 $ . GJ − 1 for the total output power, total cooling capacity, energy efficiency, exergy efficiency, and sum unit cost of products, respectively. Finally, a parametric analysis is performed to show the effect of the main influential parameters on the system’s performance. It is revealed that the increment of separator’s pressure results in lower output power, lower exergetic efficiency, higher cooling load, and higher thermal efficiency.

Internal combustion engines are of the important systems with extensive applications in power generation and agricultural/industrial machines and vehicles due to their promising features such as high thermal efficiency, and reliability. The reuse of the exhaust gas and jacket water waste heat is an effective method to improve engine performance and decrease fuel consumption and environmental pollution. In this paper, to recover the waste heat of a diesel engine, cogeneration of electrical power and freshwater is proposed. The Kalina cycle is used for power generation through the utilization of exhaust gas energy, and for freshwater production, the HDH system is employed using jacket water energy. Thermodynamic and exergoeconomic analysis and optimization are applied to the proposed system. The effect of several parameters on net output power, exergy efficiency, HDH unit performance, and the sum unit cost of the system's product is studied. The comparison of the Multi-objective optimization results with the base case outcomes betokens that the thermal efficiency and exergy efficiency are improved by 1.88% and 1.52%, respectively. Moreover, the SUCP value is reduced by 0.94 $/GJ. For the electricity sale price of 0.09 $/kWh, the payback period is estimated 7.2 years, and the NPV at the end of the plant's life obtained 165,814 $.

According to the needs of the weapon innovative talents development that is from" Excellent Engineering Training Program". We explore a set of "deepen the connotation, strengthening characteristic, practice driving" professional practice ability training mode for War Industry Specialty innovative talents, and construct the multi-level theory and the system of practice teaching, it sets up new teaching way.

The Microbial Prospecting of Oil and Gas (MPOG) is applied to the matured development area in the Satellite Oilfield in Daqing for the first time. And with the MPOG, the hydrocarbon accumulation regulation controlled by faults is interpreted, and the matured development area is extended out to western part. At the same time, four microbial anomalies are discovered. The MPOG results were verified by the hydrocarbon-bearing conditions of the 10 drilled wells within the following half a year, and the consistent rate is up to 80%, which add about 300×104 t of the explored petroleum-in-place. Through study and successful application of MPOG to the Satellite Oilfield, the basis of the application from the exploration to development field is substantially established, and standard system of microbial anomaly is more precisely built for the Satellite Oilfield, which provided an effective explanatory item for the studied and adjacent region, even for the whole Songliao Basin, and also a new technique for complicated reservoirs, especially for the later stage development of litho-reservoirs in China. Therefore, it must have profound influence upon the oil and gas exploration, especially upon the remaining oil, extension and reserves addition of the developed area in China.

The prestressed composite space truss (PCST) is a new kind of space structure composed of steel cables, steel tubes and reinforced concrete ribbed slabs. The prestressed steel cables are arranged in one direction or two directions within the plane of the bottom chord of the composite space truss. There are two main forms of PCST in practice; one is prestressed square on square offset composite space truss (PSSCST), the other is prestressed diagonal on square composite space truss (PDSCST). In this paper, the static behaviour of PDSCST is analyzed in detail using the linear finite element method. The first 10 natural frequencies of a PDSCST are calculated using the subspace iteration method and are found to be really close together, and all of the corresponding mode shapes are vertical vibrations. A simplified formula for calculating the first period is obtained by a linear regression method. The initial tension values in the cables to be applied during construction are calculated by the Release Tension Method which can also take into account the influence of different tensioning sequences. Finally, both the static behaviour of a PDSCST and the influence of different tensioning sequences are studied on a physical model test.

The structure of five axis machine tool is complex and expensive, especially in the processing of complex and sophisticated parts. It is prone to produce the phenomenon of overcutting or undercutting between the machine parts and the knives or the machine tool , which will cause serious damage or even grievous scrap on the machine tool . With the help of VERICUT 7.0 Simulation of NC machine tool, you can modify and optimize the NC program code, shortening the real processing time required and improving the economic benefit of the company remarkably.

To meet the demand of medium and small-sized enterprises for help in equipment fault diagnosis, a remote fault diagnosis system was designed. The system consists of user interface, server in remote diagnostic center, and experts client. C/S mode was used between expert and server, B/S mode was used between user and server. The flow chart of equipment remote fault diagnosis help system was framed. Function of signal analysis and fault feature extraction was implemented with virtual instrument technology based on LabVIEW. Function of remote data transmission was implemented by http and ftp. Real-time communication was implemented using commercial communication tools. Oracle database was selected as tools of database management. PHP was selected as implementation language of dynamic interaction. Function of security authentication was implemented by password and token. The system has mature technology base, with rich functions, easy to operate, and with friendly and comprehensive interactive system. It provides a new way of remote fault diagnosis.