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LONDON , May 23 (Xinhua) -- British Prime Minister Theresa May said Tuesday that authorities are trying to establish the full details of the explosion at the Manchester Arena late Monday night that killed at least 19 people and injured dozens of others.

"We are working to establish the full details of what is being treated by the police as an appalling terrorist attack," she said in a statement. "All our thoughts are with the victims and the families of those who have been affected."

China's submersible Jiaolong starts testing ahead of Mariana Trench dive

Chinese peacekeeping force's authority transfer ceremony held in Lebanon

Trump urges Israel, Arab world to start "new partnership"

Security tightened in Times Square after car rampage on sidewalk

Tourists visit lily garden in SW China's Guizhou

In pics: scenery of cliffs in Guoliang Village

Cheongsam lovers give performance in east China

Pic story: Technique of making Jianzhan porcelain

LED ’s test have particularity because of its features, such as, small light area銆乶arrow light beam and high brightness. To solve this problem , CIE established “TC2-45LED test“ and “TC2-46CIEISO LED Strength test standard“ Technology Commission separately. CIETC2-34 group was held a meeting on October, 1997 in Vienna headquarters, and recommended CIE127-1997LED test standard which involve LED radiosity銆乴uminosity and colourimetry. However, many unprecedented problem emerge with the rapid growth of LED technology, especially white light LED products. So , on Koyto CIE annual meeting ,in1999, the representative of developed countries proposed that CIETC2-34 make out white light LED standards, Japanese delegation also submitted two standard drafts regard to white LED light.

In order to develop lighting LED technology, developed countries are paid important attention on the study of LED test method and standard , particularly on test method about LED luminous characteristic銆乼emperature characteristic and light loss, and they are try to set up a whole set of LED test method and technology standard which take the front rank in the world. Japan founded “ white light LED test study commission specify in white light LED test method and technology standard. The developed countries invested large workforce and money on LED standard and test to grab advance LED study achievement.

In our country, semi-conductor LED test method has no relative national standard, which resulted strongly controversy among LED manufacturers and user. Optical Equipment Branch of the Chinese optical society had organized several seminar and exchange on semi-conductor test method in recent years, industry insider formed a agreement gradually and drafted a uniform industry standard SJT2355-2005“semi-conductor LED test method“ that play a vital role with regard to product exchange and compareing. The standard adopted CIE127-1997 “Measurement for LED“ , meantime, it combine with the development demand of power type white light LED, added color rendering property銆乀j, etc., then Provider LED products’ development with significant evidence.

In recent years , multi-chip or multi-tube assembled LED light were develop fast, however, there are no relative test standards specific for LED light at home and overseas. Yet, as a lighting application product, IEC and CIE already have relate measure standard. The LED light for luminous its center light strength and beam angle could reference to IEC61341-1994 , similarly, GBT19658-2005 “measurement method for reflector light ’s center light strength and light beam“ has been drafted by Zhejiang three-color device company and it will officially be carry out on August, 2005. As for the measurement for spectral radiance and color, there are CIENO.63 and GBT7922-2003 could be reference.

According to IEC608525 standard which require LED lights or light products must be take radiance safety test and the test requirement should be similar to lasher device’s. IEC adopted CIES009E2002 “Photobiological safety of lamps and lamp system“ in 2002, and took it as official standard.
Geotextile Market Application | Competitive Landscape and Technology | Forecast To 2024
by rahulkumar38471 · November 13 , 2018

13 Nov 2018 – 聽The global Geotextile Market is expected to reach USD 8.18 billion by 2024. Geotextiles are used for civil applications and agriculture having synthetic polymers as raw material. These polymers can be polyamide, polyethylene and polypropylene or even polyester. The functionality of geotextiles enables ease of separation, drainage, reinforcements, separation and filtration.

Geotextile market is driven by rise in population , construction projects, increasing popularity, rise in urbanization and rise in disposable income of consumers, positively impact as primary drivers. In addition, biodegradable soil erosion applications account for durability. Other factors accountable for the market development comprise rising employment in production sector and wide deployment of chip-based applications in electronics segment. Apart , increase in civil engineering applications is another reason accounting for a higher market share.

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