To develop new defensive measure of submarine and improve its survival probability, a conception of developing pint-size and all-purpose torpedo for submarine is proposed. The developmental actuality of pint-size torpedo is analyzed, and the combat mission that pint-size and all-purpose torpedo for submarine can shoulder is elaborated. Further, the key technique to be solved is put forward. The pint-size and all-purpose torpedo for submarine occupy more little space, and the loadage can increase. So it is expected to be a powerful weapon for submarine to attack and defense, and provide safeguard to improve submarine survival ability.

All traditional guidance methods for wire-guided + wake-homing torpedo depend on target motion parameter. Target motion parameter error has direct influence on the position error of entering wake,consequently the probability of a wire guiding torpedo capturing targetl falls. Based on past-bearings guidance method,past-bearings is modified according to aiming point and target wake trait, guide wire-guided +wake-homing torpedo accordingly. Whether target motion parameter is getted or not,and whether target eludes or not,torpedo can be guided to expectant position only by continuous bearings.

Aiming at the problems existed in current azimuth guidance method and revising azimuth guidance method of wire-guidance torpedo, put forwards a guiding method of wire-guidance torpedo based on fuzzy control theory. Adopt fuzzification of fuzzy control process, establish fuzzy control principle and fuzzy transformer and fuzzy judgment. Use relation among target azimuth wire included angle, sonar discrimination angle submarine and torpedo, establish wire-guidance torpedo guiding method model, and modify guiding mode of wire-guidance torpedo. The results show that the method achieves an optimal goal that the wire-guidance torpedo attacking the target.

The angle of wake homing torpedo (WHT) entering target wake is limited to a certain range due to engineering and technology requirements .This entry angle limitation has impact on both tactical usage of WHT and the determination of its largest launch range ( LLR).This paper proposes a scheme of WHT trajectory planning,in order to satisfy the entry angle requirement when it is necessary .Methods for the calculation of the LLRs are provided,for both cases with and without having to consider the entry angle readjustment.It is shown that these methods are simple and effective .

In order to research the application of NoSQL database in Cloud Storage,new features of data in cloud computing were analyzed,such as large quantity,processing speed.We also analyzed the advantages of NoSQL in this paper.With the demand of Material Dispatching System and HBase,a database design proposal of Material Dispatching System was designed in the end.

Old buildings surface cracks are more obvious with the accumulation of its disrepair, which will impact aesthetics, durability and even threaten the safety of persons and properties if feature values surpass the security thresholds. In this paper, firstly, the algorithm of the improved Canny operator gray threshold edge detection and location, based on traditional differential operators and sub-pixel positioning algorithms, achieve coarse location, furthermore, the sub-pixel location algorithm of Gaussian curve fitting based on neighbor gradient features realize sub-pixel precision positioning. Finally, crack features are calculated and comparative analysis through the measurement algorithm. The experiments prove the algorithms possess high accuracy and feasibility with important application values of assessment, identification and maintenance.

In order to optimize the firing parameters of double salvo for the wake-guided torpedo,carried out optimization research of double salvo for the wake-guided torpedo.The paper introduced the organizing method of double salvo,set up the relative mathematical models of the firing parameter calculation,and analyzed the key restriction of firing trajectory for the wake guided torpedo.Based on this,the paper researched the optimizing calculation method of the firing parameters of double salvo,gave the specific calculation model and the detailed calculating flow chart.This models bases on mathematical principle of double salvo for the wake-guided torpedo,takes trajectory restriction into account for engineering implement,at the same time researches the implement flow for the battlefield usage,so the conclude can afford theoretic uphold for researching the relational salvo problem.

China's agriculture needs to improve modernization level.The application of Internet of Things technology in agricultural production and scientific research is an important step for modern agriculture based on application of new information technology to approach.Through the analysis of the concept and application characteristics of Internet of Things in agriculture,it demonstrates that Internet of Things has a promising growth future and,in view of its agriculture application problems,suggestion to accelerate the application of Internet of Things in agriculture in China was put forward.

Recoverable Tethered Optical Fibre(RTOF)system was introduced combining the development state of satellite buoy antenna.The system's concept was introduced,and the system's construction,working principle,data transmission,and deployment and recovery process were analyzed.The future load and up-to-the-minute development of the system was discussed.

To satisfy the special demand of wake homing torpedo for aiming point,we simulate and analyze the existing selective method of shooting aiming point for wake homing torpedo according to the relevant control models of shooting and guiding wake homing torpedo and torpedo trajectory.Target velocity is found the major parameter in selection of aiming point,instead of the mid-point of target wake in all conditions.Selection of proper aiming point must take account of both the least consumption of torpedo range and the highest probability of torpedo′s entering target wake.A practical method for determining aiming point for wake homing torpedo is hence proposed.

According to the attacked decision-making demand of the new type wire-guided torpedo in submarine,a new method is proposed in this paper,taking the real-time forecast results of torpedo's range as the attacked decision-making gist of submarine wire-guided torpedo based on analyzing the disadvantages of the traditional gist.This paper puts forward the analytical mathematical model of real-time forecast of torpedo's range in consideration of synoptically moving factors of the targets based on analyzing the azimuth guiding method in detail,and the mathematical model can forecast torpedo's range and wire-guiding time.The plenty emulation results show that the model is reasonable and the new method can meet the needs of attacked decision-making gist of wire-guided torpedo.

According to the wake-homing torpedo’s particularity in control and guide mode,this paper analyses the decision-making demands that are different from other torpedoes by the special requirement of wake-homing torpedo in checking and tracking target and puts forward several problems which required research and solving begins with the common process and decision-making contents that exist in the submarine torpedo attacking course. The paper can provide reference to solve the attacking problem of wake-homing torpedoes.

Based on analyzing the trajectory specialty of wire + wake homing torpedo and the using restriction of the wake's coming angle of torpedo,the paper describes torpedo's trajectory track using Runge-Kutta method,when the wake's coming angle or the initial shooting distance is different,then the paper analyzes and gives the feasible area of effectual attack of wire + wake homing torpedo.The method improves homing torpedo's calculating method in describing the feasible area of effectual attack,and it can meet the requirement when the caption chooses the appropriate shooting location for wire + wake homing torpedo.