net profit percentage The accounting income maintains the financial capital preservation, namely, the monetary value that only requires the owner to invest is not eroded, the enterprise income exceeds the input value part is the accounting income. Accounting focuses on reporting financial results. The economic benefits insist on physical capital preservation, which can only be confirmed when the actual production capacity of the owner is saved. It is believed that only by maintaining the actual production capacity of the enterprise can the enterprise reproduce smoothly. Physical capital preservation is more meaningful than the income of financial capital preservation, but it is difficult to measure. The market can indeed be described as a laissez-faire pricing mechanism. However, this price mechanism does not operate in a vacuum, and does not work effectively in any social system. The basic premise of the efficient operation of the price mechanism is the implicit assumption of Smith: to recognize individual "lusts" and to clear and protect individual property rights. Clear and guaranteed personal property is the basic premise of market existence. It is necessary to recognize the personal "lusts" and to ensure that individual property rights are supported by the corresponding institutions, which are not in our society. Think the dissipative structure theory, the negative entropy is to maintain and develop dissipative structure in the process of ordering "power", only the negative entropy flow to the system input, to offset the internal entropy, generated by the block system to the direction of a disorderly change, in order to maintain and develop ordering movement of the system. Obviously, this view only looks at the ordering process of dissipative structure from the perspective of pure "energy exchange". However, the nature of the material in addition to the energy the most basic characteristics, but also has many other features, such as physical properties, chemical properties and biological characteristic, social characteristic, the information characteristics, the material properties of the energy as long as the organization and cooperate well, can be used to promote the human survival and development, to maintain and develop human ordering, played the same energy orderization and objectively, and can according to the main body of the objective need of ordering energy converted into a number of standards, the dissipative structure of the ordering process is not only determined by the energy exchange, must also be by "material exchange" and "information exchange". It can be seen that some non-energy forms of the generalized preordering energy can be attached to the ordering energy and indirectly affect the preordering degree of the dissipative structure. Cave although not directly provide food for animals, for example, energy, but it can be for animals from the cold in winter, make animals reduce body heat loss, and reduce the disease incidence and mortality of animals, the objective effect and reduce the loss of food energy, improve the body of food energy use efficiency. Obviously, these not energy in the form of "ordering energy" from the objective effect does play a orderization and energy is exactly the same effect, also can promote the development of the dissipative structure ordering, plays an alternative on features, compensation, strengthen, catalytic, extension, ordering the role of energy, is a kind of indirect power energy. On the basis of "dissipative structure theory", the concept of unified axiology is put forward. Commercial vehicles are divided into three categories: passenger cars, vans and semi-trailer tractors. The passenger bus subdivided into small passenger car, city bus, coach, tourist bus, hinged passenger bus, coach, off-road bus, private bus. Goods vehicles are subdivided into general goods vehicles, multi-purpose lorries, full trailer tractors, off-road trucks, special operations vehicles and special goods vehicles. Investment in securities provides an important channel for the society to raise funds, which is an effective way for enterprises to raise direct financing. 6. Clarity. Plan should be clearly expresses the organization's goals and tasks, clearly expresses the resources necessary to achieve goals and taken by the procedures, methods and means, explicitly expresses the managers at all levels in the rights and duties in the process of execution plan. But let's remember that the increased participants were basically in the interest of the economy and were attracted to new tokens that they felt were promising.