Model essay on experimental report

Experiment is one of the basic methods of scientific research. According to the purpose of scientific research, we should try our best to eliminate the external influence, highlight the main factors and use some special instruments and equipment to artificially change, control or simulate the research object. Below I will bring you a sample essay on the experimental report, hoping to help you!

Experience of experimental report Model essay 1

After four weeks of * * * eight hours of basic welding experiments, I feel that I have learned a lot. Although I learned welding during my sophomore year as a metalworking intern, I didn't know anything about welding principles at that time. Now I feel relaxed after I have basically studied the basic theory of welding and come back to do experiments, because I know a lot about the principles of welding. I also know that welding is not just electric welding, but also gas welding and so on.

In the welding experiments around here, we have generally studied gas welding and electric welding, and in the gas welding, we have also divided the welding of low carbon steel, medium carbon steel and high carbon steel. We can obviously feel that the difficulty for high, medium and low carbon steel is obviously different during the welding process!

In one course, we studied the welding of cast iron, and we obviously felt poor fluidity of cast iron! Before each experience experiment, the teacher always introduces us to the matters needing attention in the experiment and the experimental content! Through the teacher's introduction and personal experience, we can say that we have a good understanding and experience of the content of each experiment.

I have a particularly deep memory of this welding experiment, because many problems appeared during the experiment, and the teacher always explained to me in detail the causes of these problems and how to solve them. For example, one experiment was about the butt joint of thin steel plates. I carefully placed two thin steel plates on the test board and welded them. I thought this was the simplest welding, but the result was not satisfactory. When I welded these two steel plates by flat welding, I found that the welded steel plates were seriously deformed, and the originally flat steel plates became warped! Moreover, due to poor welding technology, the weld seam is very uneven, and even the phenomenon of welding penetration has appeared in some places. I am really ashamed of such welding products! However, the teacher explained to me in detail the reasons for these problems. For example, the steel plate is tilted because of uneven heat dissipation during welding. These phenomena can be solved by experience. The teacher held my hand and filled in the hole that was welded through. The teacher told me that this was caused by the short Han arc and the slow welding speed! He also encouraged me not to lose heart. I was particularly touched!

I am very annoyed that I have a whole body of theoretical knowledge, but the welding effect is still so poor, so I think this experiment is very necessary, which is very helpful for us students who have learned a lot of theoretical knowledge. It makes us see our own gap and lack of experience. In the future, we need to study hard and pay more attention to practical application, so that we should be comprehensive and practical applied talents!

model essay on experimental report 2

Through this experiment, I opened my eyes. It is precisely because this experiment is characterized by vibration measurement and spectrum analysis of slewing mechanism and first-order natural frequency and damping coefficient test of cantilever beam that it needs to be programmed with software and displayed by computer. It can be said to be semi-automated. Therefore, in the course of the experiment, I learned a lot: it made me deeply understand the preparation of theoretical knowledge before the experiment, that is, to know the relevant materials of the experiment to be done in advance, such as experimental requirements, experimental data, experimental steps, and most importantly, what data to record and how to do data processing, and so on. Although when doing experiments, the instructor will explain the experimental steps and how to record data, but if you don't have some basic knowledge, it will be difficult to do it at that time. You can only do what the teacher tells you, but you don't know what to do.

In this experiment, I learned a lot, which strengthened my practical potential and cultivated my independent thinking potential. Personality is when doing experimental reports, because there are many problems in data processing, it will be difficult to continue if they are not solved. For example, when processing data, it is necessary to acquire data, which requires understanding some basic operations of labview software; Also, when drawing, you should use software to draw, which also requires you to know the insert chart command of e_cel software. And when doing vibration measurement and spectrum analysis experiments of slewing mechanism and obtaining data, pay attention to changing the sampling frequency when reading waveform, and so on. Of course, I have not only learned this, but I won't say much there.

There is also the hands-on experiment, which combines some theoretical knowledge of the course of testing technology with practice, which deepens my understanding of the course of testing technology and consolidates my theoretical knowledge.

But this experiment is good, but I don't think it's well scheduled, and there are test technology exam times. It's precisely because these schedules conflict with our curriculum design time that I can't concentrate on any one, and the quality of each project can't be guaranteed as a result, so please point out if there are any mistakes!

Model essay on experimental report 3

After the professional introduction course in the first semester, we got to know the major of ship and ocean engineering, so in this semester, we got rid of slides, pictures and words, and saw the real laboratory. This is how ships were built. Every Thursday afternoon, starting at two o'clock, dragging the body that is not fully awake, we wander around the laboratories, listening to the teacher's explanation, the story of each laboratory and the role of each laboratory. This is a professional introduction last semester. In my opinion, it should be a practice. We have learned more about our major. Although I still don't understand many professional terms said by the teacher, I still feel that I have learned more about this major after listening carefully, but it is said that the professional introduction is a continuation plus practice.

A few weeks ago, we listened to the teacher introduce some knowledge about the ship's performance in the performance laboratory, and visited the large-scale model towing pool and the large-scale depth control pool. At that time, we also saw our seniors and sisters doing experiments. It is estimated that they will arrive at us in a year or two. Although these laboratories look a little old now, although we only see some steel, iron and water tanks, to be more precise, we see some rusty steel and water tanks that feel dirty inside, but all the things in these laboratories were very advanced laboratory equipment in China. Large-scale ship model towing tanks are: 1. They can be used in depth and can be used for fleet tests, which is unique in China; 2. Large-scale depth-controlled pool: the most manually controlled pool in Asia; 3. The laboratory of shipbuilding technology and equipment has advanced domestic level, and its experimental equipment of "cold bending robot for ribs" is international level; 4. The large-scale structural test platform and complete static and dynamic loading and analysis system are the first of its kind in domestic universities; 5. High-level research platforms such as circulating water tank, wind tunnel, 24-unit wave generator, computer workstation and related software. These laboratories all study hull performance and ship performance, which broadly refers to the sum of all kinds of ship performance; In a narrow sense, it refers to the generalization of static performance and dynamic performance of ships. The narrow sense of ship performance is closely related to the main size, shape and loading of the ship. In theoretical research, the buoyancy, stability and sinking resistance of ships under different conditions are studied on the basis of hydrostatics, and the rapidity, seaworthiness and maneuverability of ships are studied on the basis of hydrodynamics, which are the most basic properties of ships. After listening to it, I really feel that the ship is also a very magical thing. In such a storm, it can actually sail with so many items. In addition, those warships are even more powerful. Such a large volume can also have such a fast speed. I can't help but respect the shipbuilding workers, overcome so many obstacles and build such a powerful ship. Next, we visited the laboratory about the ship structure, and the structure determines the performance, so the ship structure can be said to be equivalent to the human body, the skin is equivalent to the hull, the bones are equivalent to the hull skeleton, and so on, all of which are very important. Through the teacher's talk, we initially learned that the general ship is composed of hull, hull skeleton, deck, cabin and superstructure. Hull, also known as hull plate, is the hull of a ship, which includes side plates and bottom plates. The geometric shape of the hull is determined by the shape of the hull plate. Various external forces, such as longitudinal bending force, water pressure and wave impact force, bear on the hull plate first. The hull skeleton is composed of keel, side keel, ribs, keel, stern keel, bow column and stern column, which together form the ship skeleton. The deck is a plane structure above the inner bottom plate, which is used to cover the interior space of the ship and divide it into layers horizontally. Deck is the steel plate on the ship beam, which divides the hull into upper, middle and lower layers. Deck plays an important role in ensuring the strength and unsinkability of the hull, and provides an area for arranging various cabins and placing weapons and mechanical equipment. The number of decks depends on the size of the ship, depending on the type, mission and main dimensions of the ship. Usually small ships have 1 ~ 3 floors; Medium-sized ships have 3 to 5 floors; Large ships have 5 ~ _ floors. Cabin is a space for various purposes below the nail plate, including bow cabin, stern cabin, passenger cabin, cargo cabin, engine room, boiler cabin and various special-purpose cabins. Superstructure refers to the building above the main deck, which is surrounded by the upper deck and is mainly used to arrange cabins for various purposes, such as working cabins, living cabins, storage cabins, instrument and equipment cabins, etc. Ship tools for crew to work, live and store. The superstructure includes the first building, the bridge building, the tail building, the deck room and various walled buildings. Of course, I searched most of the above online. Although the teacher introduced us, it was not so detailed.

Then there was the marine engineering laboratory which impressed me the most. The teacher in the marine engineering laboratory was very responsible for introducing what equipment was on board and what their functions were. Although we are marine and ocean engineering, not marine engineering, we should pay more attention to ship structure, but we still listened very interestingly. The main systems of marine engine comprehensive laboratory include: main propulsion system, ship piping system, ship power station system, engine room automation system and diesel engine digital monitoring and diagnosis system. Among them, we know the ship piping system in detail, including engine room fuel system, engine room lubricating oil system, main seawater and fresh water piping system, compressed air system, engine room bilge water, ballast water and fire water system. First of all, we were introduced to the engine room fuel system. Generally, there is diesel oil and fuel oil on board, and of course there is lubricating oil. The teacher raised a question here, why not use diesel oil instead of gasoline? Gasoline should be ignited, and diesel is compression ignition, so diesel is selected for safety reasons. When offshore, it consumes less energy, and when docked, it consumes more energy, because when docked, it needs to call various systems, but when offshore, it doesn't need so much, so when docked, it consumes more energy. Also, we know that there is a difference between heavy oil and light oil. Heavy oil needs to be heated when it passes through the pipeline, so that it can swim smoothly in the pipeline, otherwise it will solidify in the pipeline. Therefore, heavy oil is usually used when it is offshore, and light oil is usually used when it is docked, in order to protect the machine. If heavy oil is used, solidification in the pipeline will bring great trouble for the next start. Next, the main seawater and fresh water systems are introduced, which are mainly used to cool the machine. Why is it still divided into seawater and fresh water? It turns out that seawater is high in salt content and easy to corrode machines, so we should desalinate seawater first. First, we think of salt water separation, but the teacher said that the salt is still too high. Finally, he told us that generally speaking, salt water is converted into fresh water by distillation. The original purpose of cooling is to take away energy, but the diesel engine mainly provides energy for the system by obtaining high temperature. If all the energy is taken away, it is not in line with economic benefits, so high-temperature fresh water is used to cool the machine. After the high-temperature fresh water is used up, the brine will cool it down, and then it will be recycled to achieve the purpose of cooling down. After the introduction of oil-water system, we see that compressed air system, compressed air system, as its name implies, is the heat generated by air compressor for other components to use.

finally, we have a brief understanding of the types of ships, which are usually classified according to their purposes: general transport ships, passenger ships, groceries, bulk cargoes, etc. Special transport vessels: container ships, timber ships, ro-ro ships, refrigerated ships, oil tankers, liquefied natural gas ships, etc. Multi-purpose ship mineral powder, mineral oil, etc. Special purpose ship scientific research, icebreaking, rescue, etc. Of course, we are most interested in luxury cruise ships. Super luxury cruise ships usually refer to super cruise ships with a displacement of more than _ , tons. By the end of 2, there were more than 15 such super cruise ships, among which the cruise ship "oasis of the seas" of Royal Caribbean Cruises made its maiden voyage in December 2. The cruise ship is about 36 meters long, 47 meters wide and 65 meters high above the waterline. It has 16 decks and 2,7 cabins, which can carry 6,36 passengers and 2,16 crew members. With a displacement of 225, tons, it is known as an "active city". I really yearn for such a super luxury cruise ship!

I have gained a lot from this cognitive experiment. From the past to the present, all scientific research has been verified by experiments. In other words, experiments are the standard for testing theories. As a college student, we must not tolerate ourselves reading books and studying books, but only analyzing them in theory without practice. I believe that as long as we are willing to use our brains, supplemented by diligence and persistence, we will be able to continuously improve our practical ability and innovate.

experimental report and model essay 4

University laboratories are important bases for cultivating high-level talents and carrying out scientific research. In western developed countries, schools attach great importance to cultivating students' practical ability, and this issue has been paid more and more attention by Chinese educators in recent years. In order to improve students' practical ability, let students do relevant training and complete the experiment report of single chip microcomputer, and pay attention to cultivating students' experimental skills and practical ability in the form of experiments. Middle school students can sum up a lot of experience from the experience of single chip microcomputer experiment to adapt to the development of contemporary society.

to learn the course of single chip microcomputer, we should master the meanings of various basic statements in assembly language in the instruction system of single chip microcomputer, the basic knowledge and methods of assembly language programming, and the interface technologies such as input and output interruption when single chip microcomputer is connected with other equipment. Make students integrate theory with practice from the combination of hardware and software, improve their hands-on ability, and thus fully master the application of single chip microcomputer.

The whole process of experimental teaching includes three stages: cognition, foundation and synthesis. In the past, the experiment of single chip microcomputer was to compile and debug software, which was out of touch with the hardware circuit in practical application. Students lack the ability of hardware design, debugging and analysis, and lack understanding of how to form a minimum application system of single chip microcomputer. Single-chip microcomputer experimental board, through computer connection simulator, combines hardware and software to debug together on the experimental board.

Software modification is also very convenient. After both software and hardware debugging pass, the program is solidified in eprom, and 851 single-chip microcomputer is inserted to form a complete single-chip microcomputer application system.

I. Composition and basic functions of the experimental board of single chip microcomputer

The experimental board of single chip microcomputer consists of 831, 8155, eprom2764,