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Aiming at the problems of complex and diversified communication networks in various emergency rescue scenarios and the independence of the command and communication systems of ordinary dispatch consoles, a SIP-based emergency communication console is proposed, which not only describes in detail the composition of the hardware modules of the console, but also elaborates on the application of SIP soft switching technology in the program. The console supports access to digital and analog communication networks to realize voice communication and multimedia video communication through wired and wireless broad band communication. Based on SIP soft switch technology, the concept of fully converged communication is proposed for the emergency communication needs under different emergency rescue scenarios to complete the unified command and dispatching, which provides a reference for the development direction of the emergency communication console.

In order to realize the underground portable real-time monitoring of the vital signs of personnel and timely arrange rescue, a mine intrinsically safe watch was designed. Take NRF52840 low energy bluetooth chip as the control core, using GH3020 health monitoring IC + MPU6050 acceleration sensor + NST112x temperature sensor as the acquisition unit, combined with the power circuit design, to achieve vital signs data acquisition, BLE/Wi-Fi combined with high-precision RSSI technology to realize the rapid detection of device location signals. The Cortex-M4F core is used to provide efficient data calculation, compression, storage and remote transmission of data. The watch has the characteristics of high integration, good stability, high precision and low power consumption, and supports TCP/IP, ANT, Thread wireless communication and other protocols. After testing, the data acquisition accuracy, power consumption, sustainable working time and other indicators of the equipment have reached the productization standard, and are displayed on the PC in real time, to provide important protection for the life and health of miners.

Aiming at the problem that the underground communication link of the mine is interrupted and the information of rescuers cannot be exchanged after the disaster, a mine intrinsically safe AD hoc network base station is designed. Based on the SDR platform, the equipment adopts the scheme of FPGA + ADI AD9361+ intrinsic safety circuit, and uses wireless multi-hop, self-organization and strong self-healing ability of wireless mesh network technology to quickly and conveniently form a wireless communication network in the environment of underground power supply and communication system being destroyed, and at the same time, provides wireless coverage for terminal equipment such as handheld terminals, mine control balls, mine information recorders, etc., to realize information exchange between the accident scene and the forward command. The test results show that the base station has the advantages of self-provided power supply, high safety factor, small size, light weight, small power consumption, etc., 2.4 GHz and 1.4 GHz dual-band wireless networking, multi-hop capability of 6-8 hops of video, single-hop transmission distance greater than 200 meters, single-hop transmission delay of less than 7 ms, power consumption of less than 15 W, and continuous work for 4.5 h, which can solve the communication problems encountered in the emergency rescue process of various accidents and disasters in mines.

The centralized resolution system of the domain name system (DNS) implies an unavoidable risk of abuse of power,a top-level domain may be deleted from the root zone.By analyzing the related work on the root zone decentralization,the most were mainly to deploy new root resolution services outside the current root servers,but not to decentralize the root zone data.A scheme to decentralize the root zone data was proposed,and the decentralization of root zone data distribution and analysis were achieved through a peer-to-peer coalition between national roots.Trust from peer-to-peer to collective,with features such as autonomy,openness,equality,and transparency,and implements a distributed consensus on root zone data through blockchain technology were transformed by the program,thereby ensuring root zone data consistency.

To evaluate the user experience of IT systems, building up a user experience oriented IT key performance indicator architecture, which is the foundation of transferring the IT management from the infrastructure monitoring and analysis to service monitoring and analysis. Based on the lot of real world's new requirements of the IT service management, the architecture of user experience oriented IT key performance indicator was analyzed and designed, and an application management effectiveness platform or system was implemented, via the platform, could automatically and effectively monitor and analyze the IT systems.

Objective To investigate the efficacy and safety of fractional micro ablative laser combined with estriol cream in the treatment of postmenopausal mild to moderate stress urinary incontinence（SUI）. Methods Postmenopausal patients（220 cases） with mild to moderate SUI in Sichuan Jinxin Women & Children Hostipal and the Third People's Hospital of Chengdu from January 2020 to January 2022 were randomly divided into the control group（n=110） and the study group（n=110）. The patients in the control group were treated with fractional micro ablative laser, while the patients in the study group was additionally given estriol cream. The patients were followed up for 6 months. The clinical efficacy, 1h urine leakage, urinary incontinence symptom score, quality of life score, selfrating anxiety scale（SAS）, selfrating depression scale（SDS） score, endometrial thickness changes and adverse reactions were compared between two groups. Results One patient was lost to followup in control group. Compared with control group, the total effective rate was higher（84.55% vs 73.39%, P＜0.05）, the 1h urine leakage was less ［（1.96±0.78）g vs （2.56±1.14）g， P＜0.05］, the quality of life score was higher, the scores of urinary incontinence symptoms, SAS and SDS were lower （P＜0.05） in the study group. There was no significant difference in the incidence of adverse reactions and endometrial thickness during treatment and followup （P＞0.05）. Conclusion Fractional micro ablative laser combined with estriol cream in the treatment of mild to moderate postmenopausal SUI can improve the effective rate and the quality of life of patients, relieve anxiety and depression, have long treatment intervals, convenience and high safety.