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Aiming at the application and research of machine vision, a comprehensive and detailed elaboration is carried out in its two application areas: visual inspection and robot vision. Introduce the composition, characteristics and application advantages of the machine vision system. Based on the analysis of the current research status at home and abroad, the application development trend of machine vision is prospected.

The measurement of public service satisfaction involves many latent variables and the validation of a causal model, and the application of structural equation modelling can effectively solve these problems. This study constructs a customer satisfaction index model for measuring the satisfaction degree of public service in China City. The main factors and its loading coefficients of affecting the public service quality of China City are verified; what’s more, the suggestions on improving the satisfaction degree of public service quality are proposed.

Based on the panel data of “first-line cities” and “new first-line” cities from 2006 to 2018, this paper constructs an extended linear expenditure system model (ELES) to empirically study the path law of service sub-consumption upgrade. Based on the full-sample OLS estimation, it is found that the overall marginal propensity for service consumption in the sample cities is 0.418, of which the sub-consumption propensity for cultural, entertainment and education services is the most obvious, followed by medical and health services, and transportation and communication services are the lowest. Based on service subconsumption, the research on price and income elasticity found that the expenditure and income elasticity of cultural entertainment and education, which has the most significant marginal propensity to consume, is the largest, while the price and income elasticity of health care services is the smallest. An empirical test based on sub-samples found that the marginal service consumption propensity of “first-line cities” and “new firstline cities” are 0.558 and 0.379, respectively; in terms of service breakdown, “first-line cities” have propensity to consume cultural entertainment and education services Significantly higher than the “new first-line cities”, the sub-item propensity to consume in medical and health services is slightly higher, and the sub-item propensity to consume in transportation and communication services is slightly lower.

Aiming at the problem of the effective connectivity of a large number of mobile combat units in the future aeronautic swarm operation, this paper proposes an idea of using UAV(Unmanned Aerial Vehicle) to build, and studies the deployment of the network. User coverage and network connectivity are important for a relay network planning which are studied separately in traditional ways. In order to effectively combine these two factors while the network’s survivability is taken into account. Firstly, the concept of node aggregation degree is proposed. Secondly, a performance evaluation parameter for UAV relay network is proposed based on node aggregation degree, then analyzes the lack of deterministic deployment and presents one a PSO (VFA-PSO) deployment algorithm based on virtual force. Finally, compared with the existing algorithms, the validity and stability of the algorithm are verified. The experimental results show that the VFA-PSO algorithm can effectively improve the network coverage and the survivability of the network under the premise of ensuring the network connectivity, and has better deployment effect.