Due to its powerful information storage and programming capabilities， DNA is regarded as the most promising new material for information storage and processing. There is an urgent need to develop novel DNA manipulation techniques and information processing strategies to achieve nanoscale information storage and processing in non-traditional media， thereby providing the tools for construc-ting a new generation of intelligent molecular information processing systems. Based on the basic mechanism of signal regulation and communication in organisms， relevant research in recent years from the perspective of DNA molecular allostery was summarized. Firstly， relevant research on DNA circuits was summarized， including DNA strand displacement technology and the application of protein enzymes. Secondly， the important research results of intelligent molecular information processing from two aspects of information processing and computing platform were analyzed and summarized， inclu-ding DNA neural networks， analog biochemical reaction systems with learning ability， and computing frameworks based on DNA origami. By sorting out these studies， the key problems faced in current intelligent molecular information processing research were analyzed and potential solutions were proposed. Finally， the future directions and applications of this field were summarized and prospected.It is believed that molecular information processing technology will bring more efficient and intelligent information processing methods to human society.

Composite material tanks are prone to microcracks at cryogenic temperature conditions.Accurately predicting the initiation and evolution of structural microcracks at cryogenic temperatures is crucial for the design and optimization of tank structures.An embedded multi-fiber representative volume element model was established to study the influence of cryogenic temperature conditions on the initiation and evolution of microcracks in composite laminates that considered the in-situ effect.This model was consisted of two 0° adjacent constraint layers and a 90° intermediate layer.Under transverse tensile loads and cryogenic temperature conditions，the microcrack initiation strain and tensile stress in the structure were obtained，and the initiation and evolution of microcracks were studied.The results show that cryogenic temperatures significantly influence the initiation location and evolution path of microcracks in structures. Microcracks are prone to occur in structures at cryogenic temperatures. The interface debonding is more likely to occur in regions with denser fiber arrangements at cryogenic temperatures. The thermal stress results in variations in microcrack initiation location between ordinary temperature and cryogenic temperature conditions. Notably，the structural damage evolution pattern in the intermediate layer remains consistent under both ordinary and cryogenic temperatures.

To address the issue of improving the surface integrity of superalloy GH4169，ultrasonic peening and thermal exposure tests were conducted on superalloy GH4169 specimens.The specimens were first subjected to ultrasonic peening tests with a penning coverage of 98%~125% and peening intensity of 0.15 A and 0.25 A. Then the specimens were thermally exposed at 250 °C，400 °C and 550 °C for 1 hour and 10 hours respectively. Finally，the effects of ultrasonic peening on the surface roughness，hardness，microstructure and residual compressive stress of superalloy GH4169 were analyzed，as well as the changes in residual compressive stress after thermal exposure. The results indicate that after ultrasonic peening，the surface of superalloy GH4169 undergoes plastic deformation and the surface hardness significantly increases.The grain refinement in the near-surface layer is significant，and the grain size shows a gradient distribution from the surface layer to the depth，introducing residual compressive stress in the surface layer.Compared to 0.15 A，the peening intensity of 0.25 A increases the grain refinement by 29%.After high-temperature thermal exposure，the residual compressive stresses on the surface of superalloy GH4169 undergo thermal relaxation，with the maximum rate occurring at the initial stage of thermal exposure，after which it tends to stabilize and becomes independent of the duration of thermal exposure.The higher the thermal exposure temperature，the more intense the relaxation of the near-surface residual stress and the greater the depth at which the maximum residual compressive stress is located.

To suppress the corner separation phenomenon existing in the compressor and improve the working performance of the engine， based on the NACA48-K65 compressor model， the structure of the blade root self-induced jet structure was designed. By numerically simulating the influence of different opening positions and different height ratios of the blade root self-induced jet structure on the aerodynamic performance and flow field structure， the scheme most conducive to reducing the total pressure loss coefficient was determined. The results show that the blade root self-induced air jet structure can effectively weaken the vortex strength of the suction wall， suppress the corner separation along the pitch and blade height direction， and reduce the flow loss of the cascade. The backward movement of the opening position will lead to a gradual weakening of the control effect. Increasing the height ratio will increase the suppression capability first and then decrease it. The optimal scheme can reduce the total pressure loss coefficient by 10.5 %.

In order to reduce the flow loss at the tip clearance of rotor，the shape of rotor tip clearance was optimized with NASA stage 35 as the research object. The effect mechanism of different rotor tip clearance shapes on single-stage compressor performance and flow field structure was studied by numerical simulation. The results show that the stability margin increases greatly with the decrease of tip clearance value， parallel-type tip clearance，hump-type tip clearance and concave-type tip clearance increase by 2.21%，2.30% and 2.54% respectively，and peak efficiency is almost constant. After the modification the total pressure ratio is increased，and high entropy generation area in the leading edge of the rotor is reduced. The inter-action between shock wave and tip leakage flow is weakened，the leading edge spillage phenomenon is suppressed，the high vorticity area in the rotor channel is reduced，the rotor channel blockage phenomenon is weakened，and the total pressure loss coefficient in the stator channel is reduced. After the modification the rotor stall mechanism changes. The rotor stall may be caused by tip leakage vortex breaking near the rotor pressure surface，large boundary layer separation area on the suction surface，and spanwise underflow accumulation in the corner region of the shroud.

Taking the unmanned autonomous helicopter （UAH） for campus patrol as an example，ai-ming at the problem of three-dimensional flight path planning during the low-altitude flight of UAH，a three-dimensional multilevel flight path planning algorithm based on ant colony optimization （ACO） algorithm was proposed.Firstly，according to the constraint conditions of the environment and the performance characteristics of UAH，the campus environment was modeled as a three-dimensional raster model，and the distribution of static obstacles was highly stratified to build a two-dimensional raster map.Then，two-dimensional flight path planning was carried out based on the ant colony optimization algorithm with improved pheromone updating mechanism.When the unmanned autonomous helicopter encountered static or dynamic obstacles in front of it，its vertical take-off and landing characteristics were utilized to realize the transformation of the altitude layer. In the new altitude layer，the ant colony optimization algorithm was used to replan the flight path，and finally the three-dimensional flight path planning of the unmanned autonomous helicopter's low-altitude flight task was realized.The simulation results show that the ACO algorithm with improved pheromone updating mechanism can realize the 3D flight path planning of unmanned autonomous helicopter at low altitude better.

The practical working conditions of the wing beam structure were established according to the airworthiness regulations to improve the flight performance and safety of the aircraft. The reliability optimization design of the wing beam structure was completed by designing the wing beam structure parameters，constructing the comprehensive objective function，setting the constraint conditions and constructing the reliability optimization mathematical model. The reliability double-layer optimization strategy of Kriging and Bayesian optimization was adopted to solve the problem of the wing beam structure. The results show that with increasing the calls of the objective function，the mass of the wing beam structure shows a significantly decreasing trend，and the displacement of the wing beam structure under different working conditions is also reduced. Finally，the minimum mass of the wing beam structure and the minimum displacement of the wing beam structure under different working conditions are obtained. These research results provide theoretical support for the optimization design of aircraft wing beam structure.

The Belt and Road Initiative plays a prominent role in the high-quality development of Chinese enterprises，and the improvement of innovation quality is the key means for enterprises to gain competitive advantage. Based on the data of Chinese listed companies from 2009 to 2022，the impact of the Belt and Road Initiative on enterprise innovation from the perspective of innovation quality was explored. The results show that the Belt and Road Initiative improves the innovation quality of Chinese enterprises，and the transmission path is resource acquisition effect，Schumpeterit effect and escape from competition effect. It provides an empirical basis for China to accurately formulate of encouraging policies to participate in the "Belt and Road"，and a reference for enterprises to choose the path of innovation quality improvement.

Considering considers consumer battery technology sensitivity and credit trading price factors，aiming at a two-level vehicle supply chain composed of power battery suppliers and battery electric vehicle manufacturers，and the driving range，energy density and power consumption adjustment coefficient of the new dual-credit policy single vehicle credit calculation method were incorporated into the supply chain income model. The effectiveness of the new double integral policy was discussed throuth simulation experiments， and the influence of the new and old dual-credit policy on enterprise decision-making was compared.The research finds that：Compared with the old and the dual-credit policy，the new dual-credit policy can effectively improve the level of battery technology and is conducive to the profit growth of battery electric vehicle manufacturing，but it is not completely conducive to the growth of government revenue. The government can effectively improve the level of battery technology by guiding consumers to improve the sensitivity of battery technology，while relying solely on credit trading price is not effective. The new dual-credit policy provides more strategic options for battery electric vehicle manufacturers，such as vehicle manufacturers with different driving ranges can adopt diffe-rent strategies to achieve optimal production purposes.