Author: Professor Guo Shengbo, Jinan University In the border area of Sichuan, Guizhou, and Yunnan provinces today, during the Tang and Song dynasties, Luzhou was part of the Luzhou Governor’s Office and the Luzhou Southern Border Pacification Office, which successively established nineteen military prefectures and over fifty military counties. However, the geographical records from the … Read more
Abstract:This article re-examines the evolution and geographical significance of the eastern protectorate prefectures under Luzhou during the Tang and Song dynasties based on relevant historical materials, presenting some differing opinions and supplementary evidence. Keywords: Tang and Song, Luzhou, Protectorate Prefectures, Protectorate Counties The junction of Sichuan, Guizhou, and Yunnan provinces In the present-day area where … Read more
Wei Yingwu (737-791), a poet of the Tang Dynasty, was from Jingzhao Wannian (now Xi’an, Shaanxi). In his youth, he served as a Sanwei Lang under Emperor Xuanzong, living a life of extravagance and indulgence. After the An Lushan Rebellion, he fell into disfavor and began to dedicate himself to studying. Later, he passed the … Read more
The miniature underwater robot (characteristic size less than 10 cm) has broad application prospects in fields such as archaeology, environmental monitoring, and pipeline inspection. Compared to traditional-sized underwater robots, miniature robots have a natural advantage in narrow and complex environments. Existing bionic propulsion methods (such as fish-like, snake-like, and jellyfish-like movements) typically can only move … Read more
A precise maze on a wafer is consuming billions in R&D funds and market opportunities. In June 2025, the semiconductor industry faced a silent “avalanche.” According to the latest data from Siemens EDA: the global chip tape-out success rate has plummeted to a historic low of 14%, meaning that eight out of ten design companies … Read more
Recently, according to the latest data released by Siemens on EDA tools, the chip industry is facing unprecedented technical challenges: the success rate of first tape-outs is plummeting to a historical low of 14% in 2025, a sharp decline from 24% two years ago—this means that eight out of ten chip design companies will fail … Read more
The chip industry has recently been hit with concerning news: data from electronic design automation tools released by Siemens indicates that the current success rate for first tape-outs has plummeted to an unprecedented low of 14%. Just two years ago, this figure was around 24%, meaning the failure rate has surged by ten percentage points … Read more
As chip scales continue to expand and design complexity increases, the development of EDA software has not kept pace. Recent statistics show that the first tape-out success rate for chips has hit a new low of only 14%. Previously, it was 28%, and even earlier it was 30%, showing a decline almost every year. This … Read more
According to reports from Fast Technology, the semiconductor industry is facing unprecedented technical challenges, with the tape-out success rate for chips dropping to a historic low! Data from Siemens, an Electronic Design Automation (EDA) company, shows that the success rate of the first tape-out (tape-out) for chips has fallen to a historic low of 14%, … Read more
On June 2, Chip Ranking reported that the success rate of chip tape-outs has dropped to a historical low! According to Siemens EDA data,the success rate of first-time chip design tape-outs has fallen to 14%, a significant decrease from 24% two years ago. Eight out of ten companies failed their first tape-out. The reasons stem … Read more