The stress performance of reinforced concrete beams and steel tube concrete column joints is a key issue affecting the application of steel tube concrete structures. According to the engineering practice of a telecommunication hub center, a new joint construction form of corbel + ring beam was proposed, and the joint model under static load and repeated load was studied according to the similar principle. The experimental results show that the force transmission route of this node is clear and the force performance is better. According to the experimental results, the improved new type of node has been used in engineering practice.

Random switching modulation technology can reduce the electromagnetic interference of switching power supply. Chaos is a random signal generated by a deterministic system that can be used for a control signal modulated by random switching of switching power supplies. Taking the chaotic output of Cai’s circuit as the signal source, the software implementation method for controlling the switching modulation signal of switching power supply is given. The generated chaotic modulation switching signal is applied to the boost circuit to verify the effect of chaotic switching modulation technology in reducing the level of electromagnetic interference. The computer simulation results show that the chaotic switching modulation signal generated by using the chaotic output of the Cai circuit as the signal source can reduce the electromagnetic interference level of the switching power supply.

Visual Fortran’s hybrid programming with Visual C++, Visual Basic, and Delphi can integrate the mathematical models compiled by Fortran into various decision-assisted integrated information systems. Its hybrid programming implementation is achieved by: in Visual Fortran, the various processes that perform calculations are integrated with Win32 DLLs; Import DLLs in other object-based languages and implement calls to procedures output by Fortran DLLs. The key to implementation is to make the external procedure prototypes declared in Visual C++, Visual Basic, Delphi programs, and the guides in Fortran DLLs, provided that the calling conventions match

Aiming at the problem of a large number of dynamic reports in the development of information management system, using the DataWindow mode and database management mode in PowerBuilder (PB), an intelligent system that can be generated by users in any form of report is designed and developed, which can query and count any combination of multiple tables and fields, and provide support for internal data source query reports and external data source statistical reports. The reporting system has been successfully applied to the Beijing Family Planning Service and Management Information System.

The design of the rolling mill speed control fuzzy neural control system based on DSP chip TMS320LC2406A was studied to replace the traditional PID analog control system, which mainly involved the design of the fuzzy neural controller and the composition of hardware circuit, and the system was simulated by computer simulation. From the simulation results, it can be seen that the speed regulation system has good control performance and can achieve high control accuracy.

The basic concepts and significance of software reuse are introduced, the characteristics of the framework and its connection with commonly used object-oriented reuse techniques (BFD) such as class libraries, components, and design patterns are analyzed, and the development process of framework-based software development methods is given. First, domain analysis is carried out, that is, in a given domain, through analysis to find out the common classes and objects for all applications, and establish a domain model; Secondly, combined with the domain analysis, the system requirements specification is given; The third step is framework design, through the analysis and design of the application, the special requirements of the application in this field are obtained, so as to extend the framework to achieve the application; Finally, there is the testing of the software. At present, BFD research is more focused on specific fields such as manufacturing, banking, health systems, etc. In terms of development methods, there will be more

The oval supporting structure can become a supporting structure based on pressure through reasonable selection, and the cement-soil pile construction is simple, and it can play the role of water-stopping curtain after proper occlusion, so in the case of small excavation depth, the oval cement-soil support structure can be preferred. According to the practice of a cement-soil pile foundation pit support project, the optimal selection method of oval cement-soil support structure is studied and analyzed by taking the bearing capacity of cement-soil pile retaining wall structure as the control condition, which has certain engineering significance for the engineering application of oval supporting structure.

By analyzing the types of temperature loads that may be experienced in the whole process of high-rise buildings from construction to normal use, using the linear distribution method to calculate the temperature load acting on the building, improving the calculation of temperature action and temperature difference value, summarizing the method of determining the temperature action calculation condition, giving the expression for calculating the horizontal temperature difference of the structure of ultra-long high-rise building, and formulating the temperature action calculation condition of the ultra-long high-rise building structure, taking the main structure of the second long-distance telecommunications hub project in Zhengzhou as an example. The temperature calculation parameters of various temperature working conditions are given specifically. The actual calculation shows that the temperature calculation condition of the ultra-long high-rise building structure given in this paper can meet the temperature calculation needs of the actual ultra-long high-rise building.

Under the condition of limited resources, through a series of optimization steps with limited resources and shortest construction period, the construction goal with the shortest construction period is achieved, and a variety of optimization effects are evaluated. It is pointed out that although this optimization method can achieve the shortest duration, it cannot guarantee the optimal effect of resource distribution. It is proposed that a reasonable resource limit should be determined first according to the actual situation of the project, and the shortest duration should be obtained according to the optimization step of limited resources - shortest construction period according to the resource limit; Then, under the premise of fixed minimum duration, the optimization scheme of resource balance is carried out, so as to achieve the best resource distribution and application effect with the shortest duration and balanced resources.

In order to determine the actual bearing capacity after the transformation, the static load test study was carried out for the force performance of the bridge erector under the two working conditions of no-load forward extension and lifting girder operation, according to the different working conditions and the most unfavorable position of the bridge erecting machine, the deformation performance of the bridge erecting machine and the force performance of different members were analyzed in detail, and the main conclusions such as the yield of the B support tie rod under the cantilever extension condition, the deformation of the bridge erecting machine was too large, and the quality of the bridge erecting machine joint needed to be improved. It provides a basis for the further improvement of the bridge erecting machine.

According to the Taylor expansion of structural eigenvalues with indefinite parameters, the statistical characteristics (mean, variance) calculation formula of random change of eigenvalues is derived. Taking the simple supported beam with random parameters as an example, the statistical characteristics of the structural eigenvalues of the simple supported beam when the mass density of the structure changes randomly by using the perturbation Riccati transfer matrix method are used to calculate the applicability of the method, and the mean and variance of the random eigenvalues when the flexural stiffness and length of the cross-section of the simple supported beam are randomly changed by using the method, and the statistical characteristics of the structural eigenvalues of the simple supported beam with random parameters are quantitatively described.