China Petroleum & Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Beijing Xiaomi Mobile Software Co., Ltd.

Beijing Smartmi Technology Co., Ltd.

Icloudshield Security Technology Co., Ltd.

Xiaoqing Wang

Jun Feng Liu

Ke Xu

Feng Pan

Jun Liu

Hongfei Wu

Mingfang Zheng

Tonglin Li

Songshuang Hu

Dongxu Liu

Yuya Omoto

Huaigu Ou

Chuanshe Zhang

Qian Ding

Disclosed are a URL parameter value anomaly detection method and system. The method includes obtaining a real-time request log; analyzing the real-time request log to generate one or more parameter values; classifying each parameter value based on a preset parameter value classification category to determine a parameter value category of a request URL in the real-time request log; generating a key according to a domain name, a request URI, and a parameter name in the real-time request log; retrieving a target dataset corresponding to the key from a pre-stored parameter feature library; and matching the parameter value category of the request URL in the real-time request log with a category and a category confidence level of the target dataset; and when they are not matched, it can be determined that the parameter value of the request URL in the real-time request log is anomalous.

URL parameter value anomaly detection method and system for the same

A halogen-containing compound represented by a formula I and a use thereof as a ligand of an ethylene oligomerization catalyst composition, an ethylene oligomerization catalyst composition comprising the halogen-containing compound, and an ethylene oligomerization method, ethylene trimerization method and ethylene tetramerization method using the catalyst composition are provided. Serving as the ligand of the ethylene oligomerization catalyst, the halogen-containing polymer may effectively improve the catalytic performance of a catalyst system, especially by displaying a significantly improved catalytic performance in an ethylene oligomerization reaction. The maximum catalyst activity may exceed 4&#xd7;10g&#xb7;mol(Cr)&#xb7;h, and the total selectivity of 1-hexene and 1-octene exceeds 92 wt %. In a C6 product, the content of 1-hexene may reach about 97%, and in a C8 product, the content of 1-octene may reach more than 98%.

Halogen-containing compound and use thereof as catalyst ligand in ethylene oligomerization

A halogen-containing compound as shown in a formula I can be used as a ligand for an ethylene oligomerization catalyst composition. The ethylene oligomerization catalyst composition containing the halogen-containing compound can be used to catalyze ethylene oligomerization, trimerization and tetramerization reactions. As a ligand of a catalyst for ethylene oligomerization, a fluoropolymer can effectively improve the catalytic performance of a catalyst system, and particularly exhibits improved activity and selectivity in an ethylene oligomerization reaction. 

Halogen-containing compound and use thereof, catalyst composition, and ethylene oligomerization, trimerization and tetramerization methods

Methods, apparatuses, and storage mediums are provided for detecting water shortage for a humidifier. The method includes: obtaining a water level parameter of a water tank; determining a water level state of the water tank according to the water level parameter. When the water level state of the water tank is a water shortage state, energizing a valve connected to a water box so that water can be added to the water tank through the valve. A number of times of energizing the valve is recorded. When the number of times of energizing the valve exceeds a first preset number of times as well as when the water level state of the water tank determined every time after energization of the valve is the water shortage state, confirming that the water box is short of water.

Method and apparatus for detecting water shortage for humidifier and storage medium

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Beijing, China

Xiaoqing Wang