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The demand for high-quality products and core technologies in economic transformation and upgrading is growing, and the improvement of residents' living standards also promotes the demand for high-end living products. Restricted by the development level of domestic related industries, these demands have not been well met, resulting in imbalance between supply and demand. This topic measures the high-quality development level of Xiamen's cultural tourism economy, analyzes its development status, compares and draws on the experience of cultural tourism economic development in other regions at home and abroad, and looks for the cultivation path of new growth points of Xiamen's cultural tourism economy, so as to lay a foundation for Xiamen to transform its resource advantages into economic advantages.

Guangdong-Hong Kong-Macao Greater Bay Area (GBA) is highly developed, characterized by obvious geographical advantages, excellent natural resources, continuous improvement of environmental quality, and accumulation of scientific and technological innovation elements. It is an important space carrier and hinterland for the construction of " the Belt and Road initiative ". However, the long-term, high-speed, and extensive development model has also caused the Greater Bay Area to carry more debt in the environment and history. Therefore, in order to construct the pattern of ecological civilization construction in GBA, it is urgent to establish and improve the evaluation system and policy system of ecological civilization from the top-level design, and to construct the pattern of high-quality ecological space, green industry and joint defense.

Soil erosion and socio-economic interacts with each other. Soil and water loss destroys land resources, causes non-point source pollution, affects the recycling and utilization of water resources, worsens the water environment, and even causes natural disasters such as collapse, landslides, and debris flows. Soil erosion affects regional socio-economic development. On the one hand, economic and social development has caused a sharp increase in people’s demand for the development and utilization of natural resources, which has increased the occurrence of soil and water loss; on the other hand, economic and social development has promoted people’s understanding of soil erosion and soil and water conservation, enabling people to consciously change their production and lifestyle, and having sufficient funds to invest in soil and water conservation and reduce soil erosion.

The light transmittance of greenhouse surface directly affects the illumination of greenhouse, and will eventually affect the indoor ground temperature, temperature, humidity and Photosynthesis of crops, thus affecting the growth of crops. As a modern greenhouse maintenance and cleaning equipment, greenhouse cleaning machine plays an active role in improving the light transmittance of greenhouse and improving the production efficiency of farmers. This paper mainly expounds the structure, principle and method of different kinds of greenhouse cleaning machines in China and abroad, analyzes the current development situation and prospects of greenhouse cleaning equipment, and puts forward some suggestions.

A self-designed new welding robot to be employed in the intersected weld of large pressure pipes is introduced in this paper. The welding robot can effectively serve as a substitute for a worker who would otherwise face a high labor intensity. The pose model of the welding tool is established to ensure that the welding tool maintains a good pose to make the molten pool run smoothly. The kinematics model of welding robot is established by Denavit-Hartenberg method, and the trajectory of welding tool is planned and determined. The designed of control system is communicated through PLC and touch screen, based on flexible modular mechanism, the welding tool pose can be adjusted according to the pressure vessel specification and the size of welding seam to ensure the welding quality of welding seam. Finally, the test unit for the designed robot system is set up, and experiments demonstrate that this welding robot could meet the intersected welding requirements of a large pressure vessels environment.

Almost all electronics and mechanical equipment have controllers to control the entire or certain tasks. These controllers respond to various types of inputs and performs the function accordingly. One type of input given to the controller is the touch and these controllers which use human touch has touch screen to act as the medium. The touch screen does not give haptic feedback to the users whereas the buttons normally take up more space and cause disturbance and confusion in recognizing the state and the function of the buttons. In this paper, we propose a simple sliding mechanism for rapid switching between different button patterns, in which the buttons remain flat in the surface when inactive and protrude out of the surface when active. The design and simulation are carried out on SolidWorks and the prototypes are fabricated and tested. This mechanism incorporated in the buttons and installed in an automobile, increases the level of automation and enhances the human-machine interaction.

By comparison various control methods currently for permanent magnet brushless DC motor, on the basis of motor principle analysis, a current smallest and most real-time all-digital rare earth permanent magnet brushless DC motor control system is designed. The high-speed digital signal processor DSP2812 is applied as the main control unit. The fuzzy PID control algorithm is used to control rectifier regulator and speed, which the speed and current is double closed loop in the system. The principle of control system, control strategy and software is analyzed in this paper. The system has some features such as less overshoot, rapid response speed, good performance of anti-jamming, simple structure, high control precision, flexible in changing control policies and so on. Validity of the design is verified by prototype test.

GMZ bentonite has been selected as a buffer/backfill material for the design of Chinese HLW repository due to its suitable properties. Investigations have been conducted on this material to have a better understanding of its engineering behavior. In this paper, a review of the studies on the chemical effects in GMZ bentonite is presented. The adsorption of radionuclides Ni(II), Cr(III) and Eu(III) etc. on GMZ bentonite is investigated and the influences of external chemical agents are assessed. Some modifications on GMZ bentonite have been implemented to improve its adsorption properties. In the meantime, the influences of NaOH solutions with variations in concentration and pH values on hydraulic conductivity, mechanical behavior and mineralogy of GMZ bentonite are investigated with consideration of temperature. Effects of salt solutions are also assessed in different studies using solutions of Na+ and Ca2+, which are the predominant cations in the groundwater of Beishan area. It is observed that both cations influence the buffering behavior of bentonite at a different degree. Further investigations should be done for better understanding the influences of coupling factors and time on the chemical behavior of material.

The design of hybrid electric vehicle drive motor is based on the premise of meeting the electric requirement. As the power generation and the regenerative braking are in operation state, it can not charge the battery when the normal generating voltage of motor is lower than that of the battery. In view of the problem, the hybrid electric vehicle driving motor control system is designed. In this system, the boost operation of pulse-width modulation (PWM) method of half controlled rectifier is used to improve the power voltage, as the speed is the main measure of the feedback current and voltage. The fuzzy PID control strategy can optimize the frequency and duty cycle of PWM pulse width, and then with the generating efficiency is greatly improved. The power generation principle, control strategy and software implementation are analyzed in the paper, and its rationality is verified by experiments.