Cradle of the New Generation Aircraft! JF-22 Ultra High Speed Wind Tunnel has passed acceptance and can reproduce flight conditions at 30 times sound speed
In the development process of various types of aircraft, a large number of simulation flight experiments are required, but it is impossible to actually frequently test fly the aircraft in the sky. Therefore, wind tunnels have emerged, which is equivalent to artificially building a "flying sky" on the ground and is an essential large-scale aerodynamic experimental device for developing aircraft...
New generation Java garbage collection tool: ZGC
JavaZGCZGC ZGCThe Z Garbage CollectorTBZGC JDK 11 JDK 15 Production ReadyZGC"Z"ZZGC ZFSZFSZFS Zettabyte File SystemJeff Bonwick Oracle ZGCZGC2018Oracle ZGC TB GC 10ms G1 15%202211Oracle ZGClive-set root-set TB 8MB-16TB ZGCZGC 10ms 2018 ZGCConcurrentTracing: CompactingSingle generation: Region-basedRegionNUMA-awareNUMANon-Uniform Memory AccessLoad barriersColored pointers2022 ZGCConcurrentRegion-basedRegionCompactingNUMA-awareNUMANon-Uniform Memory AccessUsing colored pointersUsing load barriers 2018 2022 ZGC Single generation G1G1 Region-based RegionRegionZGC G1ZGC Region-basedRegion-basedZGC G1ZGC Region :Small Region Region 2M 256KMedium Region Region 32M 256K 4MLarge Region Region: 2M 4MBCompactingCompacting ZGC CMSG1"-"NUMANUMANon-Uniform Memory Access CPU CPU CPUUniform Memory Access UMA CPU CPUNUMAUMANUMA ZGC NUMAColored pointersColored pointersJVMGC CMSG1 GC ZGC GC 64 JDK zGlobals_x86.cpp ZGC 31[0 ~ 41] 42-bits 4TB Java[42-45] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [46-63] 18-bits02[0 ~ 42] 43-bits 8TB Java[43-46] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [47-63] 17-bits03[0 ~ 43] 44-bits 16TB Java[44-47] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [48-63] 16-bits0 3 4-bits Marked0Marked1RemappedFinalizable 4Marked01-bitMarked11-bitRemapped1-bitFinalizable1-bitfinalizer Marked0Marked1RemappedZGC Marked0Marked1 RemappedZGC""GCGCLoad barriersLoad barriers JIT just-in-time compilation JVMjavaString n = person...
US regulatory agencies are taking action for the first time! OpenAI officially investigated by FTC: generating false information poses risks
The Federal Trade Commission (FTC) may investigate OpenAI, the developer of the Chatbot ChatGPT, on consumer protection issues.On July 13 local time, CNN reported that the Federal Trade Commission of the United States was investigating whether OpenAI violated consumer protection laws, and asked OpenAI to provide a large number of records about the possibility of its processing personal data, providing inaccurate information to users, and "the risk of damage to consumers (including reputation damage)"...
The biggest drawback of past generations of iPhones
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How many kilowatt hours of electricity can a windmill with a cost of millions of yuan generate in one day? Can you make money by converting it into electricity bills?
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US tap water is generally contaminated with toxic PFAS, and research warns of health risks
The new research report issued by the United States Geological Survey shows that at least 45% of tap water in the United States contains toxic perfluorinated and polyfluoroalkyl substances (PFAS). These substances are not easily degraded in the environment and human body, and are also known as "permanent chemicals"...
Human tooth regeneration is not a dream? The world's first "tooth regeneration" drug will undergo clinical trials
For humans, teeth are a very precious organ. In nature, fierce animals like big sharks constantly change their teeth throughout their lives, while humans only have two opportunities to grow teeth in their lifetime, one is deciduous and the other is permanent...
Goldman Sachs: generative AI will greatly improve Musical composition ability
According to a recent report released by investment bank Goldman Sachs, generative AI will promote fundamental changes in the music industry and provide "significant opportunities" for the industry. Goldman Sachs believes that generative AI will greatly improve Musical composition ability and productivity...
Huang Qifan: The new generation of "five major pieces" will become the main battlefield of global industrial competition!
Looking back at economic history, each era's trend has given rise to several durable consumer goods worldwide. From bicycles, sewing machines, radios, to televisions, refrigerators, washing machines, to computers, LCD TVs, mobile phones, etc...
"Nepal and AI welcome the future together" | Seventy five generations of Confucius splashed ink on the scene to wish the World Internet Conference digital civilization Nishan dialogue a complete success
On the morning of June 19, when the delegation visited the Confucius Mansion, Kong Xiangsheng, the grandson of the seventy-five generation of Confucius, splashed ink on the spot and wrote two calligraphy works, "World Internet Conference" and "Nishan Dialogue on Digital Civilization"."First of all, I wish the World Internet Conference Nishan Dialogue on Digital Civilization a complete success...
The copyright of AI generated content is not clearly defined
Intern journalist Pei Chenwei, reporter of our newspaper Wu ChunxinSince OpenAI launched the generative large language model ChatGPT, generative artificial intelligence has emerged endlessly both domestically and internationally. One of the most concerning issues is whether artificial intelligence generated content (AIGC) has copyright?"The object of copyright protection is works...
Progress in research on broad-spectrum disease resistance genes in rice in China
Xinhua News Agency, Wuhan, June 15 (Reporter Li Wei, Xiong Xianghe) The reporter learned from Huazhong Agricultural University that Professor Li Guotian's team had discovered a new rice broad-spectrum disease resistance gene RBL12. The field experiment results showed that RBL12 could recover about 40% of the yield loss in the case of rice blast disease in the field...