Despite fire control in Zimbabwe’s resettlement farming areas,fire continues to damage the environment,property,crops and causes loss of lives.The goal of this paper was to investigate fire control measures implement...Despite fire control in Zimbabwe’s resettlement farming areas,fire continues to damage the environment,property,crops and causes loss of lives.The goal of this paper was to investigate fire control measures implemented by resettled farmers in Hwedza,Zimbabwe.The data used in the study were derived from both primary and secondary sources.Primary research data were obtained through questionnaires and interviews targeting households and key informants.Secondary data were collected from reports and records from relevant government institutions.Chi-square tests were conducted to establish the relationship between fire control measures and fire trends.The research findings show evidence of fire control in the study area with farmers implementing a combination of pre-suppression and suppression fire control measures.The use of fire breaks and fire brigades were the more prevalent pre-suppression measures implemented by 86%and 78%of the farmers respectively.The main fire suppression measures implemented were the use of fire beaters(92%)and dowsing with water(85%).Fire occurrence responded to control measures when burnt area declined by 24.1%for the period 2011-2014 when the number of farmers implementing control measures increased from 131 to 701.A negative association between the number of fires and fire pre-suppression measures;and burnt area and fire suppression measures was found.The study recommends early detection,education and awareness as the primary steps in ensuring effective fire control.Active participation of all responsible stakeholders and the affected farmers is also of importance to effectively manage fire.展开更多
According the to the model of single tank fire control system, this paper makes use of decomposition-coordination theory of large-scale systems to discuss the shooting problem of multiple tank the control systems, and...According the to the model of single tank fire control system, this paper makes use of decomposition-coordination theory of large-scale systems to discuss the shooting problem of multiple tank the control systems, and alalyzes specifically the three-tank the control systems and models.the process was imitated in computer, and the optimal shooting element of 3TS system was got. In addition, probability of hitting the target was calculated.展开更多
A method of accuracy assignment based on fuzzy comprehensive judgment method (FCJM) in tank fire control system is proposed. From the flowing route of the error sources and their respective correlative signals, the tr...A method of accuracy assignment based on fuzzy comprehensive judgment method (FCJM) in tank fire control system is proposed. From the flowing route of the error sources and their respective correlative signals, the transfer functions of several sources are analysed by means of mathematic simulation, and FCJM is applied to obtain the cost comprehensive factor for each part of system, combining its error sensitivity factor the mathematical model is built to solve the accuracy assignment problem. Simulation result shows the proposed method can help designer of tank fire control system work out an optimal system more efficiently and more economically.展开更多
A method of accuracy assignment based on value analysis method （VAM） in tank fire control system （TFCS） is proposed. From the analysis of primary error sources and their error transfer relationships, the mathemati...A method of accuracy assignment based on value analysis method （VAM） in tank fire control system （TFCS） is proposed. From the analysis of primary error sources and their error transfer relationships, the mathematical model is built on the basis of VAM to solve the accuracy assignment problem. Simulation results show the validation and feasibility of the proposed method. It can help designer of tank fire control system work out an optimal system more efficiently and more economically.展开更多
A modified method of design of no-steady-error and anti-disturbance controller is proposed for the design of tank stabilizers. Using a reduced-order observer to estimate its mode, disturbance can be compensated. This ...A modified method of design of no-steady-error and anti-disturbance controller is proposed for the design of tank stabilizers. Using a reduced-order observer to estimate its mode, disturbance can be compensated. This enables the system to resist sinusoidal disturbance with any magnitude. Estimate of angular velocity is used as the state feedback to replace the expensive gyro and tachometer generator. The modified method excels the traditional, and provides a new way for the design of tank fire control system. It can also be applied for the design of other servo systems in vehicle and aircraft.展开更多
To counter BTT guidance mode, new relative motion equations of the targetaircraft and the attack aircraft are proposed. The inverse system theory of the nonlinearcontrol is used, and the direct BTT-180 guidance comman...To counter BTT guidance mode, new relative motion equations of the targetaircraft and the attack aircraft are proposed. The inverse system theory of the nonlinearcontrol is used, and the direct BTT-180 guidance command is solved, which can operatethe attack aircraft to automatically complete the flight mission of the preceding stage ofthe terminal weapon delivery, and thus the automatic attack is extended from the stage ofthe terminal weapon delivery to the preceding stage of the terminal weapon delivery.展开更多
Driven by the rapid development of social economy, the construction industry has also developed rapidly. In the process of architectural design work, it involves a lot of content, in which the design of building elect...Driven by the rapid development of social economy, the construction industry has also developed rapidly. In the process of architectural design work, it involves a lot of content, in which the design of building electrical is one of the core links. However, in order to improve the design level of building electrical significantly, it is necessary to optimize and improve the fire power distribution design scheme, so that the safety and standardization of the whole building electrical structure can be guaranteed reliably. Combined with the usual fire power distribution design experience, this paper summarizes the fire power distribution design experience, and expounds the fire power distribution design scheme, fire power distribution box requirements, line protection, wire and cable selection and laying, dual power automatic transfer switch (ATSE) selection and other electrical design contents.展开更多
The main purpose of fire supervision is to evaluate the fire risk. The fire department needs to find out the fire safety risk and carry out the normalization fire supervision work by implementing effective measures. U...The main purpose of fire supervision is to evaluate the fire risk. The fire department needs to find out the fire safety risk and carry out the normalization fire supervision work by implementing effective measures. Under the new fire law system, there are still some problems such as unclear responsibilities of relevant departments, unclear responsibility boundary, imperfect mechanism, improvement of working mode and improvement of business capability. This paper discusses and analyzes the specific situation of information integration into fire supervision, and puts forward the construction measures which are beneficial to the fire protection work.展开更多
In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point predictio...In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point prediction method for unpowered gliding targets based on attitude computation.By estimating the current state of the target,we derive the target’s attitude coordinate system.Subsequently,the paper analyzes the forces acting on the target and updates the state transition matrix,ultimately calculating the future position of the target.Experimental results show that,compared to traditional methods,this approach improves the accuracy of future point predictions by 9%to 45%.展开更多
A definition of self-determined priority is used in airfight decision firstly. A scheme of grouping the whole fighters is introduced, and the principle of target assignment and fire control is designed. Based on the ...A definition of self-determined priority is used in airfight decision firstly. A scheme of grouping the whole fighters is introduced, and the principle of target assignment and fire control is designed. Based on the neutral network, the decision algorithm is derived and the whole coordinated decision system is simulated. Secondly an algorithm for missile-attacking area is described and its calculational result is obtained under initial conditions. Then the attacking of missile is realized by the proportion guidance. Finally, a multi-target attack system. The system includes airfight decision, estimation of missile attack area and calculation of missile attack procedure. A digital simulation demonstrates that the airfight decision algorithm is correct. The methods have important reference values for the study of fire control system of the fourth generation fighter.展开更多
A Target State Estimator (TSE) for airborne radar system is proposed in this paper. It is very important for fire control system to obtain accurate estimation of the maneuvering target and the TSE becomes a key link i...A Target State Estimator (TSE) for airborne radar system is proposed in this paper. It is very important for fire control system to obtain accurate estimation of the maneuvering target and the TSE becomes a key link in the integrated Flight/Fire Control (IFFC) system. By adopting the Cartesian coordinates and pseudomeasurements ,the result ed TSE has it s advantages in computation.In addition, by employing accurate range and range-rate redundant filter, the range direction estimations obtained in Cartesian filter are greatly improved. The TSE shows its satisfaCtory performance in the Monte Carlo simulation of the IFFC system.展开更多
Future Airspace Window Shooting is a newly developed technology, which needs effectiveness evaluation before widely used. Future airspace window shooting technology, simulation system development principles and softwa...Future Airspace Window Shooting is a newly developed technology, which needs effectiveness evaluation before widely used. Future airspace window shooting technology, simulation system development principles and software chosen to develop the simulation system are introduced in the first. And then the overall design of the system, realization of the system and effectiveness evaluation through simulation are discussed in detail. Through the simulation, it is known that the FAW shooting has more superior performance when facing maneuvering targets.展开更多
In this paper, a tracking system with space virtual feedback （SVF） is presented. The whole tracking system is closed by the space virtual feedback line that is the line of sight （LOS）, but the parts in the system,...In this paper, a tracking system with space virtual feedback （SVF） is presented. The whole tracking system is closed by the space virtual feedback line that is the line of sight （LOS）, but the parts in the system, such as the tracking subsystem and the servo subsystem, are in the state of open-loop. Because the SVF tracking model is used, the correcting loops can be removed in this system architecture. So the tracking speed and accuracy of the system are greatly improved.展开更多
A fire control system of artillery includes a photo-tracker, a computing subsystem and a servomechanism. The photo-tracker outputs moving characteristics of the target during the tracking process, and basing upon this...A fire control system of artillery includes a photo-tracker, a computing subsystem and a servomechanism. The photo-tracker outputs moving characteristics of the target during the tracking process, and basing upon this, the computing subsystem makes the computation and outputs shooting elements, and the servo-mechanism controls this piece of artillery to point to the foregoing position of its target in terms of the latter elements.展开更多
文摘Despite fire control in Zimbabwe’s resettlement farming areas,fire continues to damage the environment,property,crops and causes loss of lives.The goal of this paper was to investigate fire control measures implemented by resettled farmers in Hwedza,Zimbabwe.The data used in the study were derived from both primary and secondary sources.Primary research data were obtained through questionnaires and interviews targeting households and key informants.Secondary data were collected from reports and records from relevant government institutions.Chi-square tests were conducted to establish the relationship between fire control measures and fire trends.The research findings show evidence of fire control in the study area with farmers implementing a combination of pre-suppression and suppression fire control measures.The use of fire breaks and fire brigades were the more prevalent pre-suppression measures implemented by 86%and 78%of the farmers respectively.The main fire suppression measures implemented were the use of fire beaters(92%)and dowsing with water(85%).Fire occurrence responded to control measures when burnt area declined by 24.1%for the period 2011-2014 when the number of farmers implementing control measures increased from 131 to 701.A negative association between the number of fires and fire pre-suppression measures;and burnt area and fire suppression measures was found.The study recommends early detection,education and awareness as the primary steps in ensuring effective fire control.Active participation of all responsible stakeholders and the affected farmers is also of importance to effectively manage fire.
文摘According the to the model of single tank fire control system, this paper makes use of decomposition-coordination theory of large-scale systems to discuss the shooting problem of multiple tank the control systems, and alalyzes specifically the three-tank the control systems and models.the process was imitated in computer, and the optimal shooting element of 3TS system was got. In addition, probability of hitting the target was calculated.
文摘A method of accuracy assignment based on fuzzy comprehensive judgment method (FCJM) in tank fire control system is proposed. From the flowing route of the error sources and their respective correlative signals, the transfer functions of several sources are analysed by means of mathematic simulation, and FCJM is applied to obtain the cost comprehensive factor for each part of system, combining its error sensitivity factor the mathematical model is built to solve the accuracy assignment problem. Simulation result shows the proposed method can help designer of tank fire control system work out an optimal system more efficiently and more economically.
文摘A method of accuracy assignment based on value analysis method （VAM） in tank fire control system （TFCS） is proposed. From the analysis of primary error sources and their error transfer relationships, the mathematical model is built on the basis of VAM to solve the accuracy assignment problem. Simulation results show the validation and feasibility of the proposed method. It can help designer of tank fire control system work out an optimal system more efficiently and more economically.
文摘A modified method of design of no-steady-error and anti-disturbance controller is proposed for the design of tank stabilizers. Using a reduced-order observer to estimate its mode, disturbance can be compensated. This enables the system to resist sinusoidal disturbance with any magnitude. Estimate of angular velocity is used as the state feedback to replace the expensive gyro and tachometer generator. The modified method excels the traditional, and provides a new way for the design of tank fire control system. It can also be applied for the design of other servo systems in vehicle and aircraft.
文摘To counter BTT guidance mode, new relative motion equations of the targetaircraft and the attack aircraft are proposed. The inverse system theory of the nonlinearcontrol is used, and the direct BTT-180 guidance command is solved, which can operatethe attack aircraft to automatically complete the flight mission of the preceding stage ofthe terminal weapon delivery, and thus the automatic attack is extended from the stage ofthe terminal weapon delivery to the preceding stage of the terminal weapon delivery.
文摘Driven by the rapid development of social economy, the construction industry has also developed rapidly. In the process of architectural design work, it involves a lot of content, in which the design of building electrical is one of the core links. However, in order to improve the design level of building electrical significantly, it is necessary to optimize and improve the fire power distribution design scheme, so that the safety and standardization of the whole building electrical structure can be guaranteed reliably. Combined with the usual fire power distribution design experience, this paper summarizes the fire power distribution design experience, and expounds the fire power distribution design scheme, fire power distribution box requirements, line protection, wire and cable selection and laying, dual power automatic transfer switch (ATSE) selection and other electrical design contents.
文摘The main purpose of fire supervision is to evaluate the fire risk. The fire department needs to find out the fire safety risk and carry out the normalization fire supervision work by implementing effective measures. Under the new fire law system, there are still some problems such as unclear responsibilities of relevant departments, unclear responsibility boundary, imperfect mechanism, improvement of working mode and improvement of business capability. This paper discusses and analyzes the specific situation of information integration into fire supervision, and puts forward the construction measures which are beneficial to the fire protection work.
文摘In modern warfare,unpowered glide munitions,represented by JDAM,are widely used.Accurately predicting the future trajectory of such targets is crucial for intercepting them.This paper proposes a future point prediction method for unpowered gliding targets based on attitude computation.By estimating the current state of the target,we derive the target’s attitude coordinate system.Subsequently,the paper analyzes the forces acting on the target and updates the state transition matrix,ultimately calculating the future position of the target.Experimental results show that,compared to traditional methods,this approach improves the accuracy of future point predictions by 9%to 45%.
文摘A definition of self-determined priority is used in airfight decision firstly. A scheme of grouping the whole fighters is introduced, and the principle of target assignment and fire control is designed. Based on the neutral network, the decision algorithm is derived and the whole coordinated decision system is simulated. Secondly an algorithm for missile-attacking area is described and its calculational result is obtained under initial conditions. Then the attacking of missile is realized by the proportion guidance. Finally, a multi-target attack system. The system includes airfight decision, estimation of missile attack area and calculation of missile attack procedure. A digital simulation demonstrates that the airfight decision algorithm is correct. The methods have important reference values for the study of fire control system of the fourth generation fighter.
文摘A Target State Estimator (TSE) for airborne radar system is proposed in this paper. It is very important for fire control system to obtain accurate estimation of the maneuvering target and the TSE becomes a key link in the integrated Flight/Fire Control (IFFC) system. By adopting the Cartesian coordinates and pseudomeasurements ,the result ed TSE has it s advantages in computation.In addition, by employing accurate range and range-rate redundant filter, the range direction estimations obtained in Cartesian filter are greatly improved. The TSE shows its satisfaCtory performance in the Monte Carlo simulation of the IFFC system.
文摘Future Airspace Window Shooting is a newly developed technology, which needs effectiveness evaluation before widely used. Future airspace window shooting technology, simulation system development principles and software chosen to develop the simulation system are introduced in the first. And then the overall design of the system, realization of the system and effectiveness evaluation through simulation are discussed in detail. Through the simulation, it is known that the FAW shooting has more superior performance when facing maneuvering targets.
文摘In this paper, a tracking system with space virtual feedback （SVF） is presented. The whole tracking system is closed by the space virtual feedback line that is the line of sight （LOS）, but the parts in the system, such as the tracking subsystem and the servo subsystem, are in the state of open-loop. Because the SVF tracking model is used, the correcting loops can be removed in this system architecture. So the tracking speed and accuracy of the system are greatly improved.
文摘A fire control system of artillery includes a photo-tracker, a computing subsystem and a servomechanism. The photo-tracker outputs moving characteristics of the target during the tracking process, and basing upon this, the computing subsystem makes the computation and outputs shooting elements, and the servo-mechanism controls this piece of artillery to point to the foregoing position of its target in terms of the latter elements.
