News on China's scientific and technological development.

supercat

Colonel
Unlike conventional CT that can only produce black and white pictures, photon-counting spectral CT can provide high resolution and color-coded images that help to detect lesions earlier. In addition, it can compensate motion-blur and take precision pictures of the beating heart, unlike the conventional CT.
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Bacterial cellulose-based dressing can effectively stop bleeding when operating on patients with severe burns.

Chinese Team Creates Bacterial Cellulose-based Dressing for Burn Wound Healing​

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Thrombin-Anchored Bacterial Cellulose Dressing for Advanced Burn Wound Care​

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supercat

Colonel
China's computational pharmaceutical researches optimize the development of immunotherapy for 13 different cancers, including liver and colon cancer, offering hopes for patients who respond poorly to conventional therapies.
Chinese Computational System Offers Immunotherapy Patients New Hope
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Computational framework for prioritizing candidate compounds overcoming the resistance of pancancer immunotherapy​

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China is developing HIV vaccine.
Chinese HIV Vaccine Shows Promising Long-Term Immune Response in Phase IIa Trial
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dingyibvs

Senior Member
Unlike conventional CT that can only produce black and white pictures, photon-counting spectral CT can provide high resolution and color-coded images that help to detect lesions earlier. In addition, it can compensate motion-blur and take precision pictures of the beating heart, unlike the conventional CT.
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Bacterial cellulose-based dressing can effectively stop bleeding when operating on patients with severe burns.

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Not sure how the coloring would work, but compensating for motion blur is a really nice feature for a CT. Many confused patients have medical issues as the cause and need imaging, but they can't follow directions and stay still. This would be very useful in these circumstances.
 

Tomboy

Junior Member
Registered Member
Furthermore,its noise and emissions control are at world-leading levels, with a design life of 20,000 hours, maintenance intervals extended to over 2,000 hours.
Surely this is inaccurate right? Even CFM56s can stay on wings for a maximum of 20,000 cycles before overhaul(average of 18,000 cycles before overhaul). A cycle is the process of take off, cruise and landing, assuming a modest and reasonable average of 1hr for a cycle, thats 20,000 hour for TBO alone. I'm not sure if 20,000 hours means time between overhaul or actual design life here because if its total design life then IMO its rather disappointing.

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sunnymaxi

Major
Registered Member
Surely this is inaccurate right? Even CFM56s can stay on wings for a maximum of 20,000 cycles before overhaul(average of 18,000 cycles before overhaul). A cycle is the process of take off, cruise and landing, assuming a modest and reasonable average of 1hr for a cycle, thats 20,000 hour for TBO alone. I'm not sure if 20,000 hours means time between overhaul or actual design life here because if its total design life then IMO its rather disappointing.

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overall very well balanced article but author did a mistake here.. so this is likely not accurate. he confused between 20,000 and 2000 in time between overhaul. AECC didn't disclose any design life and TBO of CJ-1000 Engine. this engine matching with LEAP in other aspects/specifications so design life would be comparable too but TBO will be different as this is a brand new machine.

initially overhaul hours will be normal but as engine goes further in service this will increase.
 

siegecrossbow

General
Staff member
Super Moderator

China's domestically produced CJ-1000 engine will be airworthy by the end of the year, and the C919 will soon be equipped with a "domestic engine"!​

The intermittent nature of the Sino-US tech war is undeniable. Given this reality, long-term reliance on external supply is untenable, and the only hope lies in domestic breakthroughs . Within China's tech industry, areas like advanced semiconductor manufacturing and aircraft engines undoubtedly face the greatest uncertainty.Recently, the domestic aviation engine sector has seen new progress. According to an interview with Chinese Academy of Engineering Academician Zhang Yanzhong on CCTV's "Lu Jian Interview" on August 1st, the domestically produced Yangtze River-1000A engine has entered the final stages of airworthiness certification and is expected to be mass-produced after certification is completed in 2025. This means that the delivery of the domestically produced CJ-1000A engine (Yangtze River-1000A) has entered the countdown phase, marking the imminent achievement of "power independence" for the domestically produced C919 large aircraft .

Furthermore, in accordance with the requirements of the Civil Aviation Administration of China (CAAC), the CJ-1000A engine will complete 317 airworthiness tests , including ground verification and flight tests , by the end of 2025. C919 installation testing will begin in 2026, with the first C919 equipped with the CJ-1000A expected to be delivered to China Eastern Airlines . The engine is expected to receive formal airworthiness certification from the CAAC in 2027, entering the mass installation phase . Full commercial operation is expected in 2028, with the goal of capturing a 15% market share for C919 engines .It is understood that the CJ1000A engine has completed 300 take-off and landing tests at plateau airports and in wet and hot conditions at sea , completed the test of single-crystal turbine blades withstanding 1800°C high-temperature gas impact , and conducted high-altitude flight tests on the Y-20 platform for verification.​
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The domestically produced CJ-1000A boasts a thrust of 13-18 tons, on par with the LEAP-1C . Its fuel consumption is 0.52 kg/(kgf·h),surpassing the LEAP-1C's 0.53, resulting in a 15% increase in efficiency.Furthermore,its noise and emissions control are at world-leading levels, with a design life of 20,000 hours, maintenance intervals extended to over 2,000 hours, and nitrogen oxide emissions reduced by 30% . In other words, the domestically produced CJ-1000A has surpassed the LEAP-1C in most core performance areas, and has also achieved innovations in high-temperature-resistant materials and intelligent control systems .Of course, this series of performance advances and innovations depends on the establishment of a domestic independent innovation system; more than 60 scientific research institutes and various Chinese manufacturing "hidden champions" participated in the development of the CJ-10 00A engine , such as Fushun Special Steel supplying high-temperature alloy materials, Western Superconducting providing titanium alloy materials, and Polylite fully supporting the field of 3D printing. These are all breakthroughs in key component technologies.

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And people are still scared that WS-15 integration will be delayed a long time WS-10 style. Give me a break. Things are all progressing according to plan.
 

Tomboy

Junior Member
Registered Member
overall very well balanced article but author did a mistake here.. so this is likely not accurate. he confused between 20,000 and 2000 in time between overhaul. AECC didn't disclose any design life and TBO of CJ-1000 Engine. this engine matching with LEAP in other aspects/specifications so design life would be comparable too but TBO will be different as this is a brand new machine.

initially overhaul hours will be normal but as engine goes further in service this will increase.
Hopefully flight test on the C919 by the end of this year is correct
 

tokenanalyst

Brigadier
Registered Member

Tsinghua University Naco's high-speed and wide-width (solid-state) dry electrode equipment was successfully delivered.​


the high-speed, wide-format (solid-state) dry-process electrode equipment independently developed by Tsinghua University Electronics and Tsinghua University Nanotechnology Co., Ltd. was successfully delivered to a leading domestic OEM. The two parties held a joint delivery ceremony. This is the first high-speed, wide-format dry-process electrode film-forming composite equipment in China, marking a key breakthrough for the company in cutting-edge solid-state battery manufacturing technology and further validating the technical maturity and industrial adaptability of the company's dry-process electrode equipment.

The high-speed wide-width (solid-state) dry electrode equipment delivered by Qingyan Naco this time has a width of 800mm and a maximum speed of 50m/min. It has the advantages of being solvent-free, low energy consumption, and high efficiency. It supports fine control of key parameters such as pressure, temperature, and speed, and realizes one-stop green manufacturing from powder to electrode sheets.

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The equipment and materials are highly compatible and suitable for multi-process exploration and production line verification by mainstream car companies, battery cell companies and other customers; it has a high degree of integration and intelligence, meeting customers' requirements for multiple batches and precise control in the pilot stage, while also meeting the high requirements of solid-state batteries for process stability and performance consistency.

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In recent years, as battery cell manufacturers and automakers accelerate their development of next-generation power batteries, solid-state batteries have attracted significant attention due to their advantages such as high safety and high energy density. Furthermore, dry electrode technology, with its environmental friendliness and efficiency advantages, has become a key process path for solid-state batteries.

As one of the earliest companies in China to integrate dry-process technology and equipment, Qingyan Naco has always insisted on technological breakthroughs and market expansion, and has formed a complete technology system and product matrix. It has the ability to deliver the entire process from laboratory, pilot to mass production line. The company's dry-process electrode equipment has widely served many mainstream battery and vehicle companies.

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