What are the types of architectural space combination methods, and which architectural space combination treatment methods are suitable respectively, including
① Repeat the combination of small spaces, often using the combination of walkways and units, such as houses, schools, hospitals, office buildings, etc.
(2) Spatial combinations with large volume differences, such as large gymnasiums;
③ Comprehensive space combination, such as reading room, stacks and office buildings in library buildings, has different space requirements;
(4) patchwork space combination, such as teaching buildings, office buildings, hotels and other main applicable rooms, the space height is not high. In order to enrich the change of hall space and obtain a suitable proportion of space, the floor of the hall is often lowered.
What are the combinations of architectural shapes? 1, symmetrical layout. This layout of buildings has an obvious central axis, and the main part is located on the central axis, which is mainly used for buildings that need a sense of solemnity, such as government agencies, courts, museums, memorial halls and so on.
2. Asymmetric layout. Asymmetric layout can be formed by stretching, dislocation and turning in the horizontal direction. Blocks with different volumes or shapes formed by asymmetric layout can be joined with each other or connected by connectors. We should also pay attention to the contrast or repetition of modeling and volume, the treatment of joints, and the formation of visual center. This layout is easy to adapt to different base topography and can also adapt to multi-directional perspectives.
3. In the vertical direction, the building can get the effect of "sculpture" by cutting, adding and subtracting. This layout needs to be adjusted by layers and sections, and it is often used in high-rise and super-high-rise buildings and some buildings that need to use outdoor space above the ground or take the top light.
What are the classification of several coatings for building primer?
In the past, coatings were mainly divided into the following categories: first, according to transparency, they were divided into two categories: paint and varnish; Two, according to the use can be divided into furniture coatings, architectural coatings, marine coatings, automotive coatings, etc. Three, according to the construction method can be divided into spray painting, baking paint, electrophoretic paint, etc. Four, according to the role in construction, can be divided into primer, topcoat, antirust paint, temperature resistant paint, etc. Fifthly, according to the coating appearance, it can be divided into red paint, gray paint, bright paint, matte paint, wrinkle paint, hammer paint and so on.
There are many classification methods of coatings, such as film-forming substance, function, application object, drying form, color, transparency, luster and so on. For example:
1) classified by function: sealing primer, putty, clear primer, intermediate coat, topcoat, colorant, diluent and curing agent.
2) Classification by application objects: furniture paint, automobile paint, bicycle paint, floor paint, ship paint and plastic paint.
3) Classification according to drying forms: self-drying paint (single group and double group), baking paint and UV paint.
4) Classification by color: white paint, black paint and red paint.
5) Classification by transparency: solid paint, translucent paint and varnish.
6) Classification by gloss: matt paint, semi-matt paint, bright paint and high-gloss paint.
7) Classification according to the packaging form: one-component coating, two-component coating (k, k) and multi-component coating.
8) According to its function in construction, it can be divided into primer, topcoat, antirust paint and temperature resistant paint.
9) According to the appearance of the coating, it can be divided into red paint, gray paint, bright paint, matte paint paint and crack paint.
People have long been accustomed to the above classification methods, but these methods are unscientific and inaccurate, which brings confusion to use, sales and production. Therefore, in 1982, the state officially promulgated the standard GB2705- 198 1, which unified the classification and naming methods of coatings. The basic principle of this standard classification is based on the main film-forming substances in coatings; If the coating contains a variety of film-forming substances, the substance that plays a decisive role in the coating shall prevail. Combined with the actual situation of coating production in China, the main film-forming substances are divided into 17 categories, that is, coatings are divided into 17 categories.
What types of tiles are there? Where do they fit? Different tiles have different applications for home. Blind purchase not only affects the overall home style, but also may cause future project decoration! So what types of tiles are there? Where can they be applied respectively? The whole brick surface is not glazed, and the front and back materials are the same color, hence the name. Full-body bricks are more wear-resistant, but the color is not as good as glazed tiles. Glazed tiles glazed tiles are glazed tiles. Generally speaking, glazed tiles are richer in color and pattern than polished tiles, and play a role in pollution prevention. However, because the surface of glazed tiles is glazed, the wear resistance is not as good as polished tiles. Glazed tiles are also suitable for bathroom balconies. Polished tiles Polished tiles are tiles made of polished tiles. Compared with the rough plane of the whole brick, the polished brick is much smoother. This kind of brick has high hardness and is very wear-resistant. . Scope of application Except the bathroom and kitchen, most other indoor spaces can be used. Vitrified brick Vitrified brick is made of quartz sand and mud in a certain proportion, and then polished until it is bright, without polishing. The surface is smooth and transparent as a glass mirror, which is the hardest of all tiles. Vitrified tiles are superior to ordinary glazed tiles, polished tiles and ordinary marble in water absorption, edge straightness, flexural strength and acid and alkali resistance. Scope of application Vitrified bricks are suitable for living rooms, bedrooms and walkways. Mosaic Mosaic is a special kind of brick, which generally consists of dozens of small bricks to form a larger brick. Acid-resistant, alkali-resistant, wear-resistant, waterproof, strong compressive strength, not easy to break. Scope of application Because of its small size and rich colors, it is widely used in small indoor areas, walls and outdoor walls and floors. The above recommended several common floor tiles for you, mainly depending on where you use them. You can choose according to your own needs. Here's a friendly reminder: Nanyang Terrace should choose colorful, casual and outdoor landscape tiles, cool tiles and warm tiles for the north balcony.
What are the types of building qualifications? The qualification of construction enterprises can be divided into three sequences: construction general contracting, professional contracting and labor subcontracting.
Enterprises that have obtained the qualification of general construction contracting can undertake general construction contracting projects. Construction general contracting enterprises can undertake all professional engineering construction within the construction general contracting project by themselves, and can also subcontract professional engineering or labor services to professional contracting enterprises or labor subcontracting enterprises with corresponding qualifications according to law.
Enterprises with professional contracting qualifications can undertake professional projects subcontracted by construction general contracting enterprises and professional projects contracted by construction units according to law. Professional contracting enterprises can undertake all professional projects by themselves, or they can subcontract labor services to labor subcontracting enterprises with corresponding qualifications according to law.
An enterprise that has obtained the qualification of labor subcontracting may undertake the labor operations subcontracted by a general construction contracting enterprise or a professional contracting enterprise.
What are the main types of computers used in industrial control and where are they suitable? The computers used in industrial control mainly include single chip microcomputer, programmable controller (PLC) and bus industrial computer.
According to the scale of mechatronics system and the complexity of control parameters, different microcomputers are selected.
Single-chip microcomputer or programmable controller is mainly used for small-scale systems whose control variables are switching values and a small amount of analog data information. For systems with large data processing capacity, industrial computers based on various bus structures are often used, such as STD bus industrial computers, IBM-PC bus industrial computers, multi-bus industrial computers and so on.
For multi-level and complex mechatronics system, hierarchical control system should be adopted. In this control system, according to the characteristics of each level and the controlled object, single chip microcomputer, programmable controller, bus industrial computer and microcomputer can be used to complete different functions respectively.
What kinds of imported plastic particles are there? What industry are they used in? Thermoplastics, ABS plastics, common building plastics, etc. ? Brief introduction of several commonly used plastics.
ABS plastic (acrylonitrile-butadiene-styrene)
English Name: AcrylonitrileButadieneStyrene
Specific gravity: 1.05g/cm3 molding shrinkage: 0.4-0.7% Molding temperature: 200-240℃ Drying condition: 80-90℃ for 2 hours.
materials performance
1, good comprehensive performance, high impact strength, good chemical stability and electrical properties.
2. It has good weldability with 372 plexiglass, can be made into two-color plastic parts, and the surface can be chrome-plated and painted.
3, high impact resistance, high heat resistance, flame retardant, reinforced and transparent.
4. the fluidity is a little worse than HIPS, better than PMMA and PC, and the flexibility is good.
Suitable for manufacturing general mechanical parts, wear-resistant parts, transmission parts and telecom parts.
PP plastic (polypropylene)
English name: polypropylene
Specific gravity: 0.9-0.9 1g/cm3 molding shrinkage: 1.0-2.5% Molding temperature: 160-220℃ Drying conditions:-
materials performance
Low density, strength, rigidity, hardness and heat resistance are superior to those of low-pressure polyethylene. Can be used around 100 degrees. Good electrical performance, high-frequency insulation, not affected by humidity, but brittle at low temperature, not mildew-proof, easy to age.
Suitable for manufacturing general mechanical parts, corrosion-resistant parts and insulating parts.
PS plastic (polystyrene)
English name: polystyrene
Specific gravity: 1.05g/cm3 molding shrinkage: 0.6-0.8% Molding temperature: 170-250℃ Drying conditions:-
materials performance
Excellent electrical insulation (especially high-frequency insulation), colorless and transparent, second only to plexiglass in light transmittance, good coloring and water resistance, good chemical stability and average strength, but fragile, prone to stress embrittlement, and not resistant to organic solvents such as benzene and gasoline.
Suitable for making insulating transparent parts, decorative parts, chemical instruments, optical instruments and other parts.
PPS plastic (polyphenylene sulfide)
English name: phenyl sulfide
Specific gravity: 1.36g/cm3 molding shrinkage: 0.7% Molding temperature: 300-330℃ Drying conditions:-
materials performance
1, excellent electrical insulation (especially high-frequency insulation), hard and brittle white, metallic sound when landing, light transmittance second only to plexiglass, coloring water resistance, good chemical stability, excellent flame retardancy, and non-combustible plastic.
2. General strength, good rigidity, but fragile, prone to stress embrittlement, and not resistant to organic solvents such as benzene and gasoline. After long-term use, the temperature can reach 260 degrees, and 400 degrees remains stable in air or nitrogen. After modification with glass fiber or other reinforcing materials, the impact strength can be greatly improved, and the mechanical properties such as heat resistance are also improved, and the density can be increased to 1.6-65438.
Suitable for making heat-resistant parts, insulating parts, chemical instruments, optical instruments and other parts.
I want to change a motherboard. Do you want to change CPU? What are the types of CPU? Which motherboards are suitable for? Motherboard and cpu should be used together.
What colorful colors we often see, ASUS is only a manufacturer, not a normal model of the motherboard, mainly depending on whether it is inter or AMD (the two major publishers today). If this is the cpu of inter, then the chipset of the motherboard, that is, Northbridge, is convenient to observe, as long as it is also inter, so is AMD. As for brands, colorful and ASUS are all casual. Of course, you can choose some better brands. You can go to some related websites, such as Zhongguancun Installer or pcpop (don't delete the webmaster, it's not an advertisement, it's really a suggestion for netizens). You can find something better. This is the price. Then look at your original motherboard. If it is too old, considering your memory, the old memory slot is DDR generation. The older one is sd, the older one is oblique insertion, and there is a hard disk. Now the mainstream in the market is sata interface. If you have an IDE hard drive, you should consider replacing it.
Pay attention to whether it is sata 1.0 or 2.0 when purchasing, which will affect the data transmission speed. Don't let the merchants cheat you. Charge 2.0 to you 1.0, which is mainly reflected in the interface and data cable.
Then the cpu. If your previous cpu was pin-type, you should pay attention. Now there are very few pin cpu slots on the motherboard, and most of them are point-type, so you should pay attention.
In general, pay attention to whether your slot is compatible with the original old components after replacing the motherboard.
Please contact me if you have any questions.