High score bounty. Feasibility analysis report for the production of circuit boards and relays

Well, this one is very simple, just fill it in according to your actual situation.

Looks like you have all the map data. You only need to do a few statistics.

I'll give you an example, and you can do the rest.

Take, for example, the statistics of highways.

The ground ** piece is G3,

You open both files in a window at the same time.

Select (query) query, SQL query, and a dialog box will pop up.

Use field:m00p's name column (approximately, guess), sum(objectlen(g3,"km"))

Object table: G3 Road, M00P

Search criteria: G3 intersects

group by field: m00p's name column is OK.

The results obtained by this method will not be very accurate, and if they are more accurate, they will probably have to be done with a program.

Note the objectlen function above, if you want to count the area, the function used is area(obj,"sq km"That's all, let's realize it for yourself.

Personally, I think this problem is very simple.,The functions in mapinfo are ready-made.,Direct use is.,It's mainly to write things later.,There's no time.。

I'm sure no one will help you, don't you believe it?

You can do this by making your own investigation report.

Chapter 1: General.

Introduce the situation of the project undertaking unit, the basis for preparation, the overview, the market situation, the conclusion of the feasibility study and the relevant explanations or assumptions.

Chapter 2: Project Background.

Chapter 3: Overview of the project undertaking unit.

Introduce in detail the basic information such as the enterprise name, address, business scope and scale of the project undertaking unit.

Chapter 4: Market Analysis and Marketing Plans.

Conduct market and industry analysis of project products, including market demand, competitive landscape, etc.

Chapter 5: Product Scheme and Construction Scale.

Formulate a detailed and scientific product production plan.

Chapter 6: Production Processes and Equipment.

Introduce in detail the site selection, construction conditions, production process of the product and the equipment required for the production of the product.

Chapter 7: Project Construction and Implementation Plan.

Formulate a scientific construction implementation plan. Including project investment, investment schedule and output plan, planned use of raised funds, capacity planning, raw materials and production, testing plan, fixed facilities, team building and management, etc.

Chapter 8: Environmental Protection, Labor Protection and Fire Protection.

During the implementation of the project, specific measures are taken for environmental protection, fire protection, energy conservation and other aspects.

Chapter 9: Corporate Development Strategy and Marketing Plan.

Develop a practical development plan for the company and develop a marketing plan that adapts to it.

It mainly introduces the total amount of project funds, the amount and method of required funds, and the detailed use plan.

Chapter 11: Financial Analysis.

Conduct scientific research on the company's financial situation in the next 5-10 years, including revenue, cost, profit, cash flow, etc., and on this basis, carry out break-even analysis, uncertainty analysis, financial index analysis, etc., to form a standardized, reasonable and professional financial system.

Chapter 12: Risk Analysis and Avoidance.

Objectively explain the various potential risks and the measures to avoid them.

Chapter XIII: Annexes.

The annexes of the feasibility study report include company certificates, project construction drawings and other relevant information of the project. (The feasibility study report will be adjusted appropriately according to the use and actual project).

Information to be prepared in the feasibility report: product related parameters, production surplus clearance, construction site, environment, cycle, list of main equipment, financial status of the enterprise, financing situation, other relevant basic information, etc.

Information to be prepared for the feasibility report: product related parameters, production situation, construction site, environment, cycle, list of main equipment, financial status of the enterprise, financing situation, other relevant basic information, etc.

You can go to the China Commercial Data Center to refer to it.

Feasibility study report templates are available for all walks of life.

The photoresistor CDS is made of cadmium sulfide material, and its bright resistance is about 1K, and the dark resistance is about 1m.

The working principle of the circuit is analyzed as follows:

During the day, the light is strong, and the resistance of CDS is small about 2K, then the voltage UA=2K*12V (10K+2K)=10V at point A

This 10V voltage provides VT1 with enough base current IB1 through 22K resistance to make it saturated and conductive, and the saturation conduction voltage drop of VT1 UCE1 is about <, so VT2 is in a cut-off state, and the collector of VT2 is equivalent to hanging on the ground, and the base potential of VT3 is increased to 12V, so VT3 cuts off so that VT4 is also cut off, and the lamp H is extinguished, so as to achieve the effect of automatic extinguishing of the lamp during the day.

When night falls, the ambient light becomes darker, the resistance of CDS increases to about 1M, at this time UA=10*12 (10K+1000K)=about about, VT1 cut-off, VT2 emitter potential is about 0V, UCE1 rises to about 12V, at this time, VT2 saturation conduction and VT3 base potential is pulled down to close to 0V, VT3 saturation conduction, 12V power supply through the saturation conduction of VT3 and 330 resistor, to VT4 to provide a base current.

ib4=(12-uce3-ube4-ic4*, if the working current of lamp h is 1a, vt4 = 30, then ib4=( left and right, it is enough to make vt4 enter the saturated conduction state, so that the lamp h is normally lit and emitted, so that the lamp is automatically lit at night.

That explanation is an analysis report, so let's use it directly.

CDS is a photoresistor, and the characteristics of the device are required to be: the dark resistance is larger when there is no light, and the bright resistance is smaller when there is light. The most commonly used device in the whole circuit is the transistor, which mainly uses its switching characteristics.

On the other hand, the transistor is a current-controlled device that can be turned on as long as there is sufficient current at the base. For VT1, the base voltage is the voltage on the RP resistor, when the light is weak, the CDS is larger, so the voltage obtained by RP is smaller, for the 22K resistance on the base of VT1, the current generated is too small, VT1 is not on (the transistor is a current control device), so the collector of VT1 is high voltage, for VT2, the voltage of the base is high, and the current generated through the base 22K resistor is large, so VT2 is on. Therefore, the collector voltage of VT2 is 220*12 (220+1000), the base of VT3 has a fixed bias voltage, and a large enough base current is generated through the base resistance of VT3 10K, so VT3 is on, and the voltage obtained by VT4 base is 4700*12 (4700+330), VT4 is on, so the light is on.

Conversely, the lights do not come on. Note that the selection of resistors should match the size of the base current on the transistor specification.

I feel that there is a problem with this circuit: imagine that when VT2 is not working, VT3 and VT4 are turned on, and the lights are on;

I think the photoresistor CDS and the variable resistor RP should be swapped.

I haven't studied circuits for several years...