Features of Operating Lamps

Operating lamp is actually different from the essence of ordinary light is to achieve the special requirements of surgery. First, operating room lighting brightness requirements, two, safe surgical lighting, three, no shadow requirements, four, cold light requirements, five, removable disinfection requirements. Operating lamps, including the overall reflex operation lamp and hole series of two kinds of surgical lights, the overall operation of the lamp and reflector light and single lamp; hole surgery lamp is divided into two kinds of letters and a single lamp specifications. Operating lamps, can guarantee the brightness of the operating room lighting, operating room surgeon must be able to accurately distinguish the outline, color and movement, so the need for close to the daylight quality of light intensity, at least 100,000 illumination light intensity, operating lamps can provide Single lamp up to 15 million illumination brightness, and the brightness of the operating lamps can be stepless adjustment, in case of failure in the surgical process, you can automatically switch the spare bulb, time is 0.3 seconds, so the operation lights to provide safe surgical lighting . Surgical lamp through the polygon reflector, to achieve the requirements of non-shadow lighting, the reflective surface of a molding by the industrial stamping, high reflectance 95%, forming a homogenous beam, 80 cm from the lamp under the formation of the light beam to ensure surgery Of light intensity, no shadow, and in the surgeon's shoulder, hand and head block part of the light source, can still remain very uniform.
Surgical lamp in the bright light at the same time, to avoid heat, shadowless lamp through the new filter can be 99.5% of the infrared component filtration to ensure that the light to reach the surgical area is cold light.
Surgical lamp shape design and installation position and high standard sealing handle, can effectively control the number of pathogens, disinfection can be disassembled.
Mounted on the ceiling of the operating lights, ceiling or wall in the remote control box should be set in one or more transformers to the input power supply voltage into the required low voltage of most bulbs. Most surgical lamp have dimming controls, and some can adjust the light field range to reduce the light around the surgical site (reflections and flashes from bed sheets, gauze or equipment can make the eyes feel unwell). Surgery lights to ensure that the color temperature of up to 4000 color temperature above, close to daylight, so that the color perception of the eyes more clearly, and will not make medical staff due to prolonged work and eye fatigue.

Broadband horn antennas help improve satellite communications systems

Smaller, lighter weight, better performing and more multifunctional miniature antennas with increased performance may be possible using smart materials, according to Penn State engineers. One particularly promising application of this technology is for satellite communications systems.
These antennas made of metamaterials—manufactured materials that possess exotic properties not usually found in nature—can be integrated with modern digital electronic radios that are software controlled, facilitating a transformative communications system with remarkable frequency and polarization agility.
The engineers, who reported their research in a recent issue of Advanced Electronic Materials, developed a small, functionalized, broadband antenna operated by simultaneously tuning components of the metamaterial and the antenna together as a system, said Clinton Scarborough, who worked on this research for his dissertation.
Metamaterials derive their unusual properties from manufactured structures rather than atomic or molecular interactions alone.
"Metamaterial-based antennas often suffer a stigma of impractically narrow operating bandwidths, just like small antennas," said Scarborough. "Radios need to be able to operate over a significant bandwidth, but typically only on a single channel at a time. The laws of physics dictate that a small horn antenna will have a small bandwidth, but modern radios can easily tune the antenna so that it operates on whatever channel the radio is currently using, giving comparable performance to a large broadband antenna while taking up less space and even providing new capabilities."
The engineers developed a tunable metamaterial that allows them to tune a miniaturized antenna with narrow instantaneous bandwidths across an entire communications band depending on the channel in use, said Douglas H. Werner, John L. and Genevieve H. McCain Chair Professor of Electrical Engineering.
"Tuning the metamaterial and antenna in tandem provides a dynamic operating channel, with a tunable, nearly-arbitrary polarization response as an added benefit," said Werner. "By employing our functionalized metamaterial concepts, we have been able to devise a way to dynamically tune the frequency response and polarization for the antenna, while, at the same time, providing a pathway to scaling the designs to low frequencies."
Many research groups are working on different kinds of antennas, but the one area that has been quite challenging is figuring out a way to scale these metamaterial and associated antenna structures down to operate at lower frequencies while maintaining a practical physical size and weight for the resulting integrated device—in general, the lower the frequency, the bigger the antenna, said Werner.

Trouble shooting in the insulating glass production

First barrier application:

1. Butyl rubber extrusion, appear the burr, not smooth
Solving ways:
A. If using the new machine, should notice that if the gluing hole is smooth, if not smooth, need polish it firstly, than use again.
B. If using the old machine, should check the temperature sensor, adjust the temperature up every 5℃, till the gluing normal, the gun head temperature should higher 5℃ than the inner rubber cylinder.
2. Butyl sealant peel to the aluminum and glass
Most conditions because of the low temperature, adjust the temperature to make it work normally, Scenery brand XD-T1, XD-801 butyl sealants can adapt the low temperature and work normally even in 40℃-50℃. Widely used in the north east low temperature in winder of China.
3. Appear the butyl sealant flowing after finished the secondary sealing
If choose the low quality silicone sealant which make the silicone oil removal out, dissolve the butyl sealant, and make the butyl sealant flowing.
4. Appear the break and jams, that is because the low quality of butyl sealant which contain impurities. Choose Beijing XinDeRuiJia Scenery brand XD-T1, XD-801 high quality butyl sealant can avoid to meet this kind of questions.

Second barrier for insulating glass:

1. Lower vulcanization rate
Curing agent is a variable category, appropriate to increase the curing agent content, until appropriate.
2. Stirring viscosity in winter
It is recommended: appropriate to improve the construction temperature, in principle, the use of temperature not less than 5 °
Second barrier sealing looks non-stick to glass, low strength
Recommendation: If the two components silicone sealants used to meet the standards of the product, there are two reasons for this situation:
A: Curing agent over
B: Stirring uneven.

If you use the product is not up to standard, non-stick to glass, low strength, which is an inevitable phenomenon, should be strictly prohibited non-compliance products. Choose Beijing XinDeRuiJia products, we keep sure the high quality and meet the international standards.

Coal Mining Industry Special Nitrogen Making Machine

Nitrogen Gas Fire Extinguishing Principle:
Nitrogen injection goaf oxidation zone within the essence of fire prevention is to infuse a flow of nitrogen or fire area and the oxygen levels fall below 7% or 3%, to achieve the purpose of fire prevention, its role is to eliminate the gas explosion danger; Avoid the natural heat and spontaneous combustion of coal; Reduce the intensity of combustion, prevent the airtight air leakage.
Nitrogen Generator Equipment Characteristics:
1. The patent process, compared with the same purity and flow rate of nitrogen, equipment to reduce energy consumption of 15-20%.
2. Adopt humanized man-machine interface, intelligent control, nitrogen production button.
3. The unique carbon molecular sieve compaction technology, high efficiency, long life; Installation is simple, no special foundations, leveling the ground; High reliability, low operation cost.
4. Low maintenance costs, on-site service, quick and thoughtful.
Underground coal mines with carbon molecular sieve nitrogen making machine (mobile) features:
1. Can be directly used in the coal mine gas or gas outburst place.
2. Reduce the needed for the underground gas pipeline from the ground, reduce the pressure loss of long pipes to reduce due to loss of a gas pipeline leak and.
3. Adopt humanized man-machine interface, intelligent control, simple operation.
4. Equipment fixed on the flat car is only 0.375 m high, mobile convenience.
5. Complete and reliable protection device to ensure foolproof.
6. High reliability, low running cost, low maintenance cost.

4A molecular sieve

4A molecular sieve is an alkali metal aluminosilicate, which can adsorb water, NH3, H2S, sulfur dioxide, carbon dioxide, C2H5OH, C2H6, C2H4 and other critical molecular diameter of not more than 4A. Widely used in gas, liquid drying, can also be used for some gas or liquid purification and purification, such as the preparation of argon.

Porous materials have been widely used in many fields, such as microporous 4a molecular sieves as the main catalytic materials, adsorptive separation materials and ion exchange materials, and play an increasingly important role in petroleum processing, petrochemical, fine chemical and daily chemical industry. .

Molecular sieve 4a (also known as synthetic zeolite) is an aluminosilicate microporous crystal. It is composed of silicon oxide, aluminum oxide tetrahedron basic skeleton structure, there are metal cations in the lattice (such as Na +, K +, Ca2 +, Li +, etc.) to balance the excess negative charge in the crystal. The type of molecular sieve according to its crystal structure is divided into: A type, X type, Y type.

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