Use one of the options below to locate your desired product. Max. Aperture. DORI (Detect, Observe, Recognize, Identify) is a standard system (EN-62676-4) for defining the ability of a person viewing the video to distinguish persons or objects within a covered area. The numbers in this table do not reflect intelligent function distances.

2018年8月8日 · HDCVI technology guarantees long-distance and real-time transmission without any loss. It supports up to 700m for 5MP HD video via coaxial cable, and up to 300m via UTP cable.* *Actual results verified by real-scene testing in Dahua's test laboratory.

tho指touhou only（仅东方） thp不局限于东方，非东方节目也可以参演，规矩没那么多，开银趴玩的开心才是第一位

IR length 80m, Smart IR. - เลนส์คงที่ 3.6 มม. (ตัวเลือก 2.8 มม., 6 มม., 8 มม.)

The Dahua DH-HAC-HFW 1200 THP-I4 (3.6mm) is a 2-megapixel, high-performance, cost-effective bullet camera designed for indoor and outdoor surveillance. It features a 1/2.7 inch CMOS sensor that captures clear, high-definition video footage at up to 1080p resolution.

2013年7月17日 · The tetra- hydropyranylation could be achieved on a large scale between 10 and 100mmol without any difficulty. Fol- lowing the typical reaction procedure, 18 various benz- ylic, allylic and secondary alcohols 1c–i as well as phenols 1j–k were smoothly transformed to the corre- sponding THP ethers 2c–k, respectively, in very good yields.

2019年4月30日 · As a part of ourongoing research program to develop new syntheticmethodologies involving various new reagents, 16,17 weperceived that cupric sulfate pentahydrate, which isreadily available, might be a useful catalyst for tetra-hydropyranylation because of its mild Lewis acidity.In this paper we disclose that cupric sulfate pentahy-drate can be ...

3,4-Dihydropyran (DHP) is a heterocyclic compound with the formula C 5 H 8 O. The six-membered C 5 O ring has the unsaturation adjacent to oxygen. The isomeric 3,6-dihydropyran has a methylene separating the double bond and oxygen. DHP is used for protecting group for alcohols. It is a colorless liquid. [1]

2019年11月28日 · Experience 4K video surveillance with the simplicity of reusing existing coaxial infrastructure. The 4K HDCVI camera adopts a powerful Dahua ISP and advanced 1/2.7" CMOS sensor, which provides superior high quality images. In addition, the camera features broadcastquality audio to provide enhanced supplementary evidence collection.

2019年4月5日 · 四氢吡喃 (THP)对醇的保护在有机合成中是十分有用的工具。 手性醇与二氢吡喃的反应引入了另外一个非对称中心，因此得到非对映混合物 (式1)。 这对纯化和光谱分析带来一定的困难，但并不妨碍其成功的应用 [1]。 在非常温和的反应条件下 (0 oC，1 h,89%~100%)，用 (三甲基硅烷基)硫酸酯可以使醇发生四氢吡喃基化反应，即使用丙烯基叔醇也不会有重排反应发生。 四氢吡喃衍生物的分解，在 MEM 醚、MOM 醚和1,3-二氧环戊烷存在条件下，有机锡磷酸盐缩 …