The Dynamic Evaluation of Enterprise's Strategy Based on Rough Set Theory

This paper presents dynamic evaluation of enterprise's strategy which is suitable for dealing with the complex and dynamic problems of strategic evaluation. Rough Set Theory is a powerful mathematical tool to handle vagueness and uncertainty of dynamic evaluation. By the application of Rough Set Theory, this paper computes the significance and weights of each evaluation criterion and helps to lay evaluation emphasis on the main and effective criteria. From the reduced decision table,evaluators can get decision rules Which direct them to give judgment or suggestion of strategy. The whole evaluation process is decided by data, so the results are certain and reasonable.

Technological Capacity and Technology Catching-Up for Regulatory Mechanism of Sharing Economy Enterprises

Sharing economy developed soon in China recently.On the basis of analyzing technology spillover between a technologically advanced nation(country)and a less developed one,a technology catching-up model of technological capacity and path dependence is proposed based on Verspagen mode.The proposed model can explain how a less developed nation(country)can catch up the advanced one.It is not only to improve its own technological capacity,but also whether it could bread“the locking”of path dependence.For the less developed nation(country),the“conscious behavior”of economic body cannot be ignored to achieve the evolution from path dependence to path creation.Thus,the less developed nation(country)should cultivate the technology ability,furthermore,the creative realization and ability,which could break away the negative impact of technology to path dependence,and catch up the advanced one.

Potato seed-metering monitoring and improved miss-seeding catching-up compensation control system using spatial capacitance sensor

The congenital yield reduction caused by miss-seeding in spoon-type seed-metering device of small and medium-sized potato planter is huge.Based on the physical mechanism of different measured capacitance values between two fixed capacitor plates with different media,a miss-seeding detection scheme based on a spatial capacitance sensor is proposed first.A simple and efficient spatial capacitance sensor that can obtain as large capacitance measurement value as possible is designed,and a dual CPU coordinated seed-monitoring and compensation control system architecture is adopted.AD7745 is selected for the capacitance measure of the spatial capacitance sensor,and the code of grating encoder is also recorded at the same time.Thereby,when each potato spoon passing through the space surrounded by the capacitor plates,the maximum net capacitance fluctuation and its corresponding position can be acquired.A suitable threshold can distinguish between normal-seeding and miss-seeding effectively.Moreover,it should be emphasized that,this monitoring system only requires one monitoring point.Then,based on obtained information,an improved miss-seeding catching-up compensation plan is put forward.By utilizing the powerful memory capability of the CPU,this system does not need to complete compensation immediately after the miss-seeding identification.Instead,the miss-seeding information and the location of the accident can be just marked in advance,and only when the opportunity arrives,can the miss-seeding catching-up compensation be truly executed.In this way,the position of the seed-monitoring points can be free from restriction,and the control strategy can therefore be significantly simplified.The soil tank test data showed that,the identification accuracy of the miss-seeding detection system was not less than 94%.When the seed-metering chain speeds are 0.2,0.3,and 0.4 m/s,the average success rates of the miss-seeding compensation system are 94.32%,83.65%,and 75.00%,respectively.The final miss-seeding rate can be below 3%,and the average deviation compensation rate was not higher than 30%,the miss-seeding was suppressed significantly.This system is a beneficial try in the non-photoelectric detection field and low complexity miss-seeding compensation for potato seeding.

Realization of an integrated seeding and compensating potato planter based on one-way clutch

The yield reduction caused by miss-seeding in potato mechanized sowing is astonishing.The existing research always needs to install a spare compensator on the original seed-metering device.Therefore,problems of complex planter structure and compensated potato seed poor landing accuracy need to be solved urgently.Consequently,a scheme of integrated seeding and compensating potato planter based on one-way clutch is proposed in this paper.Based on a basic‘improved one raw potato planter’and the working principle of one-way clutch,power of seed-metering system is provided through main power transmission one-way clutch by land wheels when the system works properly.However,when miss-seeding detection system with infrared radiation deciding that a miss-seeding incident has happened,the seed-metering power will be replaced by a compensatory motor through compensating one-way clutch at a higher speed.Thus,the idea of catching-up compensation can be realized.After compensation is completed,the system controller disconnects the compensatory motor,and the seed-metering power will naturally switch to the land wheels again.A prototype based on this idea was built.Field tests showed that the accuracy of seed monitoring system is more than 99.9%;the adoption of catching-up compensation scheme does not bring about empty spoon rate rise significantly.Within the range of 0.2-0.8 m/s of the seed-metering chain speed,although the average success compensation rate decreases evidently with the increase of the chain speed,the success compensation rate is still near 70%even at 0.8 m/s,the vast majority of missed seeds can be compensated effectively.

Integrative Evaluation of the Current Postal Services by Employing the Evaluation Method of GE Corporation

The paper makes an integrative evaluation of the current main ten categoriesof postal services by using the Evaluation Method of GE Corporation on the basis of the integrativeevaluation by some managers of postal enterprises concerned and some experts in the fields of postalservices on the defined eight indexes, which cover the main 4 indexes that model the postalenterprise's strength and the other main 4 indexes that reflect the future development prospect ofpostal services. And further, according to the marks given by the managers and experts to allcategories of postal services, the paper defines the quadrants of all categories of services to makecertain the orientation and measures for the development of all these categories of postalservices.