>Shenzhen Huiyan Video Electronics Co., Ltd. Shenzhen Baoriming Technology Co., Ltd. Shenzhen Baoqianli Electronics Co., Ltd.

Shenzhen Guoanda Electronics Co., Ltd. Sichuan Aipushida Digital Technology Co., Ltd. Shenzhen Ruidashi Technology Co., Ltd.

Shenzhen Hongjingtian Electronics Co., Ltd. Guangzhou Huiantai Electronic Technology Co., Ltd. Noki (China) Digital Technology Co., Ltd.

Shenzhen Xiangfei Technology Co., Ltd. Shenzhen Keanda Technology Co., Ltd. Shenzhen Jieyida Technology Co., Ltd.

Fuzhou Tianjian Optoelectronics Co., Ltd. Guangzhou Meidian Weishi Electronic Technology Co., Ltd. Shenzhen Guardian Technology Co., Ltd.

Guangzhou Ampuda Electronic Technology Co., Ltd. Shenzhen Aikangshi Technology Development Co., Ltd.

DVR type

Zhejiang Dahua Technology Co., Ltd. Shenzhen Tongzhou Electronic Co., Ltd. Shenzhen City Tongwei Digital Technology Co., Ltd.

Anwei Security Technology (China) Co., Ltd. Zhuhai Allianz Ruishi Technology Co., Ltd. Shenzhen Changen Electronics Co., Ltd.

Shenzhen Dongyun Technology Co., Ltd. Shenzhen Weixidi Electronics Co., Ltd. Shenzhen Huashi Lianfa Electronic Technology Co., Ltd.

Shenzhen Silang Industrial Co., Ltd. Shenzhen Zhongshi Xinwang Technology Co., Ltd. Shenzhen Baoxinsheng Electronics Co., Ltd.

Jinan Zhongwei Century Technology Co., Ltd. Dongguan Fuzer Electronic Technology Co., Ltd. Shenzhen Zhonghuishang Technology Co., Ltd.

Shenzhen Tekvision Technology Co., Ltd. Kangtuo Industrial (Shenzhen ) Co., Ltd. Shenzhen Longanshi Technology Co., Ltd.

Shenzhen Xingkean Electronic Technology Co., Ltd. Hong Kong Zhiteng Electronics Co., Ltd. Shenzhen Fanhai Sanjiang Electronics Co., Ltd.

Building pair Speaking, access control class

Guangdong Anjubao Digital Technology Co., Ltd. Zhuhai Competition Electronic Technology Co., Ltd. Guangdong Xiangshi Digital Technology Co., Ltd.

Xiamen ABB Zhenwei Electrical Equipment Co., Ltd. Guangdong Pan Da Electronics Co., Ltd. Shenzhen Zhongliantai Electronics Co., Ltd.

Quanzhou Jiale Electric Co., Ltd. Xiamen Dinike Electronic Technology Co., Ltd. Shenzhen Kenike Technology Co., Ltd.

Shenzhen Innovation Communication Technology Development Co., Ltd. TCL Digital Technology (Shenzhen) Co., Ltd. Shenzhen Huabaian Intelligent Technology Co., Ltd.

Shenzhen Shiantong Electronics Co., Ltd. Ruixun Technology (Hong Kong) Co., Ltd. Shenzhen Changxiang Intelligent Technology Co., Ltd. Company

Shenzhen Jiuding Intelligent Technology Co., Ltd. Shenzhen Chuangtong Intelligent Equipment Co., Ltd. Shenzhen Colt Industrial Co., Ltd.

Shenzhen Jinkai Technology Co., Ltd.

Monitors

Shenzhen Skyworth Qunxin Security Technology Co., Ltd. TCL New Technology (Huizhou) Co., Ltd. Shenzhen Jiadu Industrial Co., Ltd.

Shenzhen Anlixin Electronics Co., Ltd. Shenzhen Yuntida Technology Co., Ltd. Shenzhen Yaxunda LCD Equipment Co., Ltd.

Shenzhen Jinpin Tiancheng Electronics Co., Ltd. Shenzhen China TV Communication Co., Ltd. Shenzhen Weiguan Vision Technology Co., Ltd.

Anti-theft alarm type

Tyco Security Equipment (Shanghai) Co., Ltd. Shenzhen Haon Security Technology Co., Ltd. Shenzhen Meian Technology Co., Ltd.

Shenzhen Jingjinglong Security Equipment Co., Ltd. Shenzhen Yelang High-Tech Co., Ltd. Nanjing Yingante Technology Industrial Co., Ltd.

Dongguan Lepu Electronic Technology Co., Ltd.

Transmission and others

Wuhan Micro Chuang Optoelectronics Co., Ltd. Shenzhen Yingte Security Industrial Co., Ltd. Shenzhen Anxundacheng Technology Co., Ltd.

Nantong Zhiyong Electronics Co., Ltd. Guangzhou Aoshi Optoelectronics Technology Co., Ltd. Shenzhen Lianjiaxiang Technology Co., Ltd. Company

Guangzhou Yuhong Wire and Cable Industrial Co., Ltd. Shenzhen Utop Technology Co., Ltd. Yangzhou SEG Electric Cable Factory

Dongguan Liwei Fushi Electronics Co., Ltd. Jiangsu Min Jia Electronic Technology Co., Ltd. Shenzhen Yiwei Ruichuang Technology Co., Ltd.

Shenzhen Kedi Communication Technology Co., Ltd. Shenzhen Shenaipu Technology Co., Ltd. Guangzhou Yitian Electronics Co., Ltd.

Shenzhen Fenjinda Communication Technology Co., Ltd. Shenzhen Xinhengzong Digital Technology Co., Ltd. Shenzhen Xinyi Technology Co., Ltd.

Shenzhen Chaoshi Technology Co., Ltd. Shenzhen Hongsheng Optical Communication Equipment Co., Ltd.

Extended information

The current domestic security management is not very strict and there is no corresponding

Hard requirements. Therefore, the monitoring of public places such as highway companies, community parks, etc. may not necessarily be installed by relevant national departments, but special locations must be approved by relevant national departments.

You can also install surveillance cameras on the highway. No one will care about you, but don’t install it on the highway. No one will care about the roadside. The installation in the community is based on the requirements of the developer or property company

The park is an area under the jurisdiction of the park's internal management, including urban civilization construction and safe city

So monitoring in many places does not necessarily require construction qualifications or permit construction qualifications, and deployment monitoring qualifications

Civil surveillance is generally installed by oneself as needed, and government departments do not force intervention. However, in response to the safety precautions of the public security department in individual areas, recommendations will be made to major shopping malls, hotels, bathhouses, supermarkets, factories, traffic intersections, restaurants, parks, squares, etc. Monitoring has been installed in many areas to facilitate investigation and evidence collection to maintain public security and social harmony

What are the companies in China that monitor online public opinion data?

There are many service providers that do this now. , but there are very few manufacturers.

One of the evaluation criteria: the accuracy of network content monitoring. Judgment of content is a key technology. The current monitoring system cannot fully automatically judge and process content information. When content identification cannot be guaranteed to be 100% accurate, it is often necessary to identify intermediate products of monitoring analysis or cannot identify them. The information undergoes a certain degree of manual verification and cleaning.

Chinese information has certain particularities and technical difficulties in processing. Each word in English is separated by spaces or punctuation marks. Unlike English, there are no spaces between Chinese characters. There are many possible situations in which words can be composed of characters. Chinese word segmentation is a difficult point in recognition.

Difficulties in word segmentation: First, the ambiguity identification of word segmentation. Ambiguity refers to the same sentence, and there may be two or more segmentation methods. There are three main types of situations: "cross ambiguity", "combination ambiguity", and "true ambiguity" (see the appendix for relevant definitions).

"True ambiguity" must be linked to the context to determine the specific meaning in the text; the second is new word recognition. With the development of the times, new Chinese words continue to emerge. If they are not included, automatic recognition is required. Identification is very difficult. Similar to this, there are the identification problems of professional terms and names (including personal names, trademarks, abbreviations, organization names, abbreviations, etc.).

New word recognition accuracy has become one of the important indicators for evaluating the quality of a word segmentation system. On the basis of word segmentation, Chinese content monitoring also requires automatic clustering, sentiment analysis, and summary extraction of information, especially automatic judgment of emotional tendencies and degrees of crisis based on contextual content, and distinction between positive and negative.

This is one of the core tasks of online public opinion monitoring. In order to improve the accuracy of content identification, most online public opinion monitoring systems have adopted a professional development strategy. Through the accumulation and continuous updating of knowledge, experience and basic data in specific fields, the public opinion monitoring system has gradually established its capabilities in specific fields. Service specialties and functional advantages.

As a result, the public opinion monitoring service market has become segmented. Some focus on people’s livelihood and social trends, some focus on consumer brands, and some focus on specific industries...like Duo Rui The monitoring system of Ke Public Opinion Data Analysis Station provides a full range of monitoring services. These systems have good business inclusiveness and can meet the main needs of network public opinion monitoring, or can provide customized services according to customer needs. Such systems usually There is a system deployment phase for new customers, during which some customized work is completed. "Specialized systems" and "universal systems" each have their own characteristics. When choosing, customers mainly evaluate whether they can fully meet their own needs and have a good price/performance ratio.

Comparing the two types of systems, I personally am more optimistic about the future development of "dedicated systems". The main basis is that online media and content forms are developing very rapidly. A good public opinion monitoring system must be supported by a continuous and professional service guarantee system, and "dedicated systems" will have obvious advantages in this regard.

In addition, "dedicated systems" can also pre-set some special functions according to the special needs of specific industries or other specific fields. If designed properly, these functions will be of great help and value to target customers. It will also become one of the main selling points in marketing. The performance of different systems varies greatly in terms of accuracy.

Judging from market feedback, in the commercial field, business accumulation of monitoring services needs to be carried out by industry. In a certain industry or subdivision, some systems monitor well while others do not; similarly, ,In the field of government management services, there are ,several subdivisions, and the performance of different systems ,is also uneven. Evaluation criterion two: timeliness of network content monitoring.

The level of timeliness is closely related to software and hardware technology and operating equipment resources. The professional technology involved is not the focus of this article. What should be pointed out here is that timeliness is closely related to the accuracy mentioned earlier.

If the system’s judgment of content is highly accurate, less manual intervention is required (of course, the ideal state is that no manual intervention is required at all), there will be less time lag in monitoring information processing, and the timeliness of monitoring will be natural. There will be protection. If the system requires certain manual intervention, usually it will lag by about 0.5 to 3 days on average.

This time has far exceeded the "golden 4-hour" cycle of online public opinion monitoring and response mentioned above. If the timeliness of the system is low, it will not be able to promptly monitor and respond to emergencies in public opinion on the Internet, which is very critical for crisis public relations services.

The results of some monitoring systems rely on the search results of search engines such as Baidu and Google for re-analysis (so-called metadata capture), and the data capture and updates of these large search engines have their own specific patterns and cycles. For low-ranking websites, search engine crawler software will visit them only once every few days or even longer.

In this case, timeliness is naturally not guaranteed. Of course, different customers will have different requirements for timeliness.

Some customers will require "real-time monitoring", such as public relations companies, advertising companies that provide crisis public relations services, and some organizations that focus on people's livelihood and social trends; some customers do not have timeliness requirements. So high, such as the service demand for evaluating brand value, the service demand for post-evaluation of specific events, etc. Under normal circumstances, timeliness is an important basis for pricing online public opinion detection systems. From the perspective of saving money, customers should still choose systems and services with high cost performance that meet their own business timeliness needs. This is not necessarily required. Go to "Real-time Monitoring".

Evaluation criterion three: comprehensiveness of network content monitoring. The concept of comprehensiveness of network content monitoring is easy to understand. It is the category and total number of websites monitored by the system.

Normally, the monitoring system will not monitor the entire network. Not to mention the technical difficulties, the operating expenses and investment alone are unbearable for small and medium-sized companies. A monitoring system with superior performance will selectively monitor the network. Websites related to areas of customer concern, top-ranked websites, and hotspot websites are the main targets of monitoring.

The vast majority of systems that claim to be able to "monitor the entire network" rely on re-analysis of search engine search results - metadata capture. As mentioned earlier, this method can achieve large coverage, but sacrifices timeliness.

However, there are also some technical issues that need to be addressed in terms of comprehensiveness. Some major content service websites, social network media and e-commerce websites have already imposed restrictions on crawler software. The reasons for restrictions are different. Content service websites and social network media (SNS websites, Weibo, etc.) are mainly due to the protection of information and user data and the specific requirements of the competent authorities. E-commerce websites (independent platforms) are mainly In order to prevent online product price comparison.

Comprehensively speaking, compared to "accuracy" and "timeliness", the "comprehensive" problem is easier to solve. Technical factors are on the one hand, by increasing investment in operational resources such as servers and bandwidth. Significant improvements can also be achieved. There are many public opinion systems collected across the entire network, and I have used many of them. Currently, the Shenzhen Doric Public Opinion Data Analysis Station is doing better, followed by several in Beijing. The one in Shenzhen is the most cost-effective. In terms of technology, It's spot on, and the most important thing is the price is reasonable.