Cnpc Engineering Technology R&d Company Limited

China National Petroleum Corporation

Beijing Xiaomi Mobile Software Co., Ltd.

China Telecom Corporation Limited

Beijing Rslaser Opto-electronics Technology Co., Ltd.

Petrochina Company Limited

China Academy of Railway Sciences Corporation Limited

Beijing Huamei Inc Cnpc

Beijing Huatie Information Technology Corporation Ltd.

Signal and Communication Research Institute, China Academy of Railway Sciences Corporation Ltd.

Beijing Linking Medical Technology Co., Ltd

Beijing Ruichi Guotie Its Eng. & Tech. Ltd.

Beijing Rslaser Opto-electroncis Technology Co., Ltd.

Telefonaktiebolaget Lm Ericsson (publ)

Xiaomi Inc.

Hua Zhang

Ming Xu

Wei Liu

Chi Zhang

Fengzhong Qi

Shuoqiong Liu

Zishuai Liu

Yuchao Guo

Congfeng Qu

Yong Ma

Jianzhou Jin

Yongjin Yu

Zhiwei Ding

Youzhi Zheng

Chongfeng Zhou

Hongfei Ji

Lili Chen

Fei Wang

Guangyi Liu

Xin Liu

Shui Liu

Weiliang Xie

Bowen Cai

Jiangshan Zhao

Hong Yue

Zhaohui Wang

Pengfei Sha

Wei Li

Qiang Li

Hui Zhang

Jie Zhang

Jing Liu

Bin Lyu

Xiaobing Zhang

Rui Jiang

Xiaoquan Han

Yusi Feng

Han Guo

Deqian Wang

Xiujian Xia

Shunping Zhang

Qingqing Yin

Gang Li

Lin Wang

Qin Qiong Zhang

Chao Wu

Xiang Wang

Yong Yang

Gang Zhao

Haizhou Wang

Yuan Ma

Jianhua Guo

Ran Zhao

Yao Wang

Jiali Zhao

Rui Zheng

Qiang Gao

Hao Chang

Shi Yan

Qin Han

Xinyue Hu

Gui Li

Mingxin Li

Pu Xu

Jinping Yuan

Fuchen Liu

Zhenzhen Liu

Zhao Huang

Huiting Liu

Jiwei Jiang

Jiyun Shen

Youcheng Zheng

Xianfeng Luan

Yazhou Kou

Zibiao Fu

Deji Fu

Yingying Cui

Bingyue Lin

Qichang Li

Chaoping Zhu

Zhiduo Xie

Qizheng Hu

Jiaying Zhang

Haizhi Zhang

Guifu Wang

Chenyang Zhou

Songbing Yan

Yiliu Sun

Chengquan Li

Feng Zhou

Zebin Feng

Weiyang Fan

Junhong Yang

Mi Liao

Yi Xia

Dingkun Hong

Yong Li

A high-strength Portland cement slurry for ultra-high-temperature cementing, a preparation method therefor and an application thereof. In parts by weight, the composition of the cement slurry comprises: 100 parts of Portland cement, 4-6 parts of a high temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersant, 1-3 parts of a fluid loss reducer, 0.5-2.5 parts of a retarder and 0.2-0.5 parts of a defoamer; the high-temperature reinforcing material is a combination of acid-washed quartz sand, metakaolin and aluminum sulfate, a combination of acid-washed quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of acid-washed quartz sand, metakaolin, feldspar and calcium nitrite. The cement slurry has good settling stability, rapid strength development in low temperatures, high compressive strength of cement stone at a high temperature of 600° C., and stable development of long-term high-temperature compressive strength.

High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof

This disclosure relates to a control method for a sharing mode of a base station, a shared base station and a communication system. The method of the present disclosure includes: acquiring a load of a standalone carrier of a first operator and a load of a standalone carrier of a second operator within a first preset time; converting one standalone carrier of the standalone carrier of the first operator and the standalone carrier of the second operator to a shared carrier, in a case where a total of the loads of the standalone carrier of the first operator and the standalone carrier of the second operator within the first preset time is less than a first threshold; and switching off another standalone carrier not converted to the shared carrier of the standalone carrier of the first operator and the standalone carrier of the second operator.

Control method for sharing mode of base station, shared base station, and communication system

A method and an apparatus for controlling a transmission power, and a storage medium. The method includes: determining a target number of transmission cycles according to a service scenario of an electronic device, wherein a preset time window is divided into the target number of transmission cycles, and the preset time window is a test cycle used in a specific absorption rate (SAR) test of the electronic device; determining at least one of an upper limit value or a lower limit value of a transmission power corresponding to each transmission cycle, wherein an average value of transmission powers in the preset time window complies a SAR requirement; and controlling the electronic device to transmit and receive signals using a corresponding transmission power in each transmission cycle.

Methods and apparatuses for controlling transmission power, and storage medium

A method for controlling an electronic device includes obtaining a service scenario of the electronic device; determining an upper limit value and/or a lower limit value of a transmit power based on the service scenario; controlling the electronic device to transmit and receive signals by using the transmit power, and making an average value of the transmit power satisfy an SAR requirement.

Method for controlling electronic device, electronic device and readable storage medium

The present disclosure relates to a method for enabling a terminal to access a base station. The method includes: broadcasting, by a first BS not supporting a shared carrier, a first priority list, wherein the first priority list comprises information indicating that a priority of a BS that does not support the shared carrier is higher than that of a BS that supports the shared carrier; receiving, by the first BS, a first access request from a terminal, receiving, by the first BS, capability information from the terminal in a process of establishing a connection with the terminal; and completing, by the first BS, the connection with the terminal to enable the terminal to access a non-shared network, in a case where the terminal does not support the frequency band of the sharing operator in the shared carrier.

Method for enabling a terminal to access a base station, and base station, terminal and communication system

The present disclosure relates to the technical field of oil and gas field exploitation, in particular to an early strength material suitable for a cement slurry system, a cement slurry composition, a cement slurry system, a preparation method therefor and the use thereof. The early strength material contains an aluminum salt, a sodium salt, crystal whiskers, an inorganic mineral and dispersing agent I, wherein the weight ratio of the aluminum salt, the sodium salt, the crystal whiskers, the inorganic mineral and dispersing agent I is (1-3):(1-3):(1-4):(1-8):1. The early strength material provided by the present invention has both high-temperature retarding performance and low-temperature early strength performance; meanwhile, while satisfying well cementing, the cement slurry system prepared from the cement slurry composition containing the early strength material can prolong thickening time of cement slurry under a high-temperature condition, can prevent ultra-retarding of top cement slurry under a low-temperature condition and has increased early strength.

Cement slurry system, preparation method therefor and use thereof

An ultra-high temperature resistant cement slurry system comprising cement, an ultra-high temperature strength stabilizer, an ultra-high temperature reinforcing material, a density regulator, an ultra-high temperature suspension stabilizer, a dispersant, a fluid loss additive, a retarder, a defoaming agent and water, wherein the ultra-high temperature suspension stabilizer comprises an ether-based starch, an aluminosilicate and a polyalcohol polymer. The method for preparing the cement slurry system includes dry mixing and wet mixing raw materials homogeneously, respectively, and then homogeneously mixing the dry mix and wet mix to obtain the cement slurry system. The cement slurry system can be used for cementing in deep wells and ultra-deep wells at high and ultra-high temperatures.

Ultra-high temperature resistant cement slurry system for cementing and preparation method and use thereof

Provided are a device () and a method for online measuring a spectrum for a laser device. The device () for online measuring a spectrum for a laser device includes: a first optical path assembly (G) and a second optical path assembly (G), and the second optical path assembly (G) and the first optical path assembly (G) constitute a measurement optical path. The second optical path assembly (G) includes: an FP etalon () and a grating (). The homogenized laser beam passes through the FP etalon () to generate an interference fringe. The grating () is arranged after the FP etalon (), or is arranged before the FP etalon () in the measurement optical path, and is configured to disperse the laser beam passing through the FP etalon ().

Device and method for online measuring spectrum for laser device

A control method for stabilizing excimer laser pulse energy includes: obtaining a measured energy value of the n-th pulse in a pulse sequence; calculating the difference between the measured energy value and the preset energy value; taking the z-th pulse of the sequence as a demarcation point, when n is a positive integer less than z, the discharge voltage value of the next pulse is calculated according to a first mathematical model, and when n is an integer greater than z−1, the discharge voltage value of the next pulse is calculated according to a second mathematical model; and the next pulse is generated according to the discharge voltage value. A control system based on the control method includes: a high-voltage discharge module, a laser cavity, a laser parameter measurement module, and an energy stability controller.

Control method and system for stabilizing excimer laser pulse energy

The invention discloses a blockchain-based intrusion detection system for railway signal, which is built on a blockchain's distributed chain structure, without a central, trusted control center. This design mitigates the vulnerabilities associated with centralized intrusion detection centers. Additionally, by utilizing a blockchain-based distributed structure, it also eliminates the risk of a single point of failure for the intrusion detection center. Moreover, the data within the blockchain-based intrusion detection system is highly resistant to malicious tampering. This is achieved by leveraging the consensus mechanism inherent in the blockchain, which can achieve consensus among intrusion detection nodes. The current invention solves the internal evil attacks and avoid the inability to reach consensus between nodes due to internal evil, thereby affecting the intrusion detection performance; at the same time, the intrusion detection model can resist external network attacks.

Blockchain-based intrusion detection system for railway signals

According to the present disclosure, there is provided a device () and a method for measuring a wavelength for a laser device. The device () for measuring a wavelength for a laser device includes: a first optical path assembly and a second optical path assembly. The first optical path assembly and the second optical path assembly constitute a laser wavelength measurement optical path. The second optical path assembly includes: an FP etalon assembly () and an optical classifier (). The homogenized laser beam passes through the FP etalon assembly () to generate an interference fringe. The optical classifier () is arranged after the FP etalon assembly () in the laser wavelength measurement optical path, and configured to deflect the laser beam passing through the FP etalon assembly ().

Device and method for measuring wavelength for laser device

A standardized artificial intelligence automatic radiotherapy planning method includes acquiring a medical image; automatically delineating an ROI area of the medical image to acquire a geometric anatomical structure; determining a prescription according to disease type information corresponding to the medical image, the geometric anatomical structure, and a preset disease-prescription template library, and determining a radiation angle of radiation therapy; obtaining a radiation therapy dose distribution result using a dose prediction model; performing optimization processing using a reverse optimization algorithm based on dose distribution or DVH guidance, with reference to the radiation dose distribution result, to generate executable radiation therapy plans.

Standardized artificial intelligence automatic radiation therapy planning method and system

A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.

Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry

Growing community of inventors

Beijing, China

Hua Zhang