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Operational research is a subject with decision support as its goal. The English name of operations research is Operations Research (US) OR Operational Research (UK), abbreviated as OR, which literally translates as operations research, operations research or operations research. Operational research is a free translation of OR, which is taken from the idiom "strategizing, winning a thousand miles" and has the connotation of using planning, making suggestions and winning by strategy. At present, the contents of management science and operational research abroad are basically the same. I. Research Contents of Operations Research As can be seen from the connotation of operations research, its content is very rich and its application scope is very wide, which can be applied to the ideas and methods of operations research in many fields such as military, politics, management, economy and engineering technology. The theory that constitutes operational research can be roughly divided into three parts. 1. Analytical theory. This paper mainly studies the optimal utilization of resources and the optimal operation of equipment. Commonly used mathematical analysis methods include programming theory (such as linear programming, nonlinear programming, integer programming, dynamic programming, target programming, etc. ), network model, optimal control, etc. With the development of some new disciplines, some special analysis methods, such as uncertain programming, grey programming, fuzzy programming and stochastic programming, have emerged. 2. Decision theory. This paper mainly studies the optimal choice of scheme or strategy. Commonly used mathematical analysis methods include game theory, decisive theory, multi-objective decision-making and storage theory. 3. Stochastic service theory. This paper mainly studies the queuing and crowding phenomenon of random service system, and discusses the service efficiency, performance evaluation and optimal setting of service facilities of random service system. Second, the analysis method of operational research Operational research is a comprehensive applied science that combines qualitative analysis (such as establishing mathematical models) with quantitative methods (such as solving mathematical models). It widely uses the existing scientific technology and mathematical methods to solve the special problems raised in practice, and provides quantitative basis for decision makers to choose the best or better decision. To master the method of operational research and successfully apply it to practice, we should not only have rich knowledge of natural science and social science, but also master certain basic mathematical methods, and also use systematic concepts to understand problem analysis and ask questions, so that the research object can get optimal or satisfactory results. For example, when making an annual plan, enterprises should first collect external information such as product market demand, competitors, domestic and international economic policy environment, interest rate changes, environmental protection, etc. , and fully understand the technical strength, design ability, production capacity and resource distribution within the enterprise; The second step is to analyze and sort out the obtained external information and internal data, formulate the predetermined goals of the enterprise, establish the expression of the relationship between products and resource consumption (that is, mathematical model), make full use of enterprise resources, and obtain the greatest or greater benefits; Thirdly, the mathematical model is solved by mathematical analysis method, and the theoretical values of product output, resource consumption and income are obtained; The fourth step is to analyze and apply the expected results, effectively supervise, control and adjust during the implementation of the plan, and achieve the expected goals as much as possible. Thus, to formulate a reasonable and excellent scheme requires multidisciplinary knowledge and systematic methods. The operational research method runs through the whole process of the above four steps, namely, collecting data, establishing models, solving models and applying models. Third, the stock market investment strategy: strategic operational research in the stock market is the winner before the war, and there are too many; If the temple did not win before the war, it would be even less. Win more, win less, it is better to have nothing? From this perspective, we can see the results. Sun Tzu's art of war translation: before the war, victory could be predicted in the planning and calculation of the imperial court because of careful planning and sufficient conditions for victory; Because of poor planning and lack of conditions for winning, it is not expected to win before the war. Careful planning and sufficient conditions can win; Poor planning and insufficient conditions make it difficult to win, not to mention that there is no plan and no conditions at all. According to these aspects, it is clear who wins and who loses. Actual combat commentary: the temple is a pre-war meeting before the ancient war. The generals gathered in the temple to plan the battle plan and predict the outcome of the war. This kind of temple is similar to modern pre-war military meetings and "group decision-making" in behavioral science. The idea of pre-war calculation is also applicable to the stock market operation of small and medium-sized investors. It requires a detailed plan before intervening in an action, and implements the strategies of "planning first and fighting later" and "thinking and planning", and never fights unprepared and uncertain battles. Because of blind action and random action, gamblers' mentality is bound to fail. In combat, we must carry out the strategy of pre-war calculation. "Defeating the enemy without fighting" means that investors can calculate all aspects clearly and then make appropriate decisions, thus ensuring success and obtaining good economic benefits. Whether investors focus on long-term or short-term, they need long-,medium-and short-term planning in stock market investment. We should plan and prepare funds for the general trend judgment, operation methods, trading opportunities and contingency strategies. Before buying stocks, stock investors should first make a detailed "temple calculation" on the operating performance and profitability of listed companies, the fluctuation and development trend of various stocks, the level of bank interest rates and the trend of national policies, the cold and hot stock market and the dynamics of investors. If the conditions for profit are sufficient, choose stock decisive technology; If the time is not ripe, there is little chance or no possibility of profit, just stay put. When investing in stocks, we should be calm, try to consider various factors and avoid acting blindly without thinking. Investors, whether investing or technological opportunities, can't use the gambling mentality. Before buying stocks, you should think calmly and carefully analyze how big your economic ability is, how much risk you can bear, and what kind of operation mode you are suitable for. After some comparative analysis, then choose the right time and excellent stocks for specific operations. Stock market investment should be good at calculation. After repeated comparison and selection of various schemes, the best is selected and the correct operation strategy is formulated. In data research, we can't just look at the stock recommendation column and ignore the macroeconomic information on the home page. If you only look at the stock review and don't understand the management's intention, you will miscalculate. In stock selection, we must fully investigate, master a large number of first-hand information, and carefully select the operating targets after full analysis and judgment, which is in line with the principle of "winning first and then fighting". Never buy a stock ticket just to find some comfort and care about some fundamental information of this stock. It is a typical "fight first and then win". After selecting the target stocks, it is necessary to determine the entry point, stop loss point and stop winning point according to the disk situation and market evolution, so as to truly win without fighting. Four. Senior traders' strategy of "breaking the village" in actual combat: trading goal: minimizing risk and maximizing income. The game of risk and return, looking for the best target decision-making stock and the best return result! Trading decision: choose the best stock and operate the best stock. Combined with the characteristics of A-share market, regardless of individual stock performance and stock price, individual stocks follow the 28 law and the normal distribution theorem. The fewer market participants, the higher the degree of capital allocation. Trading steps: Step 1: From the stocks of 1600, choose the stocks that have fallen sharply in the market and those that are still closing against the market. The stocks with the most times are the Super Gold Stock Pool, which is estimated to be about 200. Step 2: From 200 stocks, choose the leading stocks and the second leading stocks in the tourism industry with the strongest stock activity and the most intensive capital accumulation as the primary target stocks. Step 3: select recent hot spots, hot topics and concept stocks as intermediate target stocks from the first-level target stocks. Step 4: Starting from the intermediate target stocks, analyze and study Public Offering of Fund, private equity funds and hot money, and the relatively hidden stocks are senior target stocks. Step 5: From the senior target stocks, choose the stock with the best risk and return as the operation decision stock, lock the stock price and position, hold it patiently, and wait for the main force to pull up!

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