Archive for ‘capable’

09/05/2020

Coronavirus spares China’s armed forces but disrupts PLA modernisation plans

  • People’s Liberation Army has officially recorded no infections but disease fears have delayed recruitment, training and operations
  • Analysts say Sars experience guided military’s prompt response, but combat effectiveness has been affected
Chinese military medical personnel arriving in Wuhan in February to assist with the response to the coronavirus outbreak. Photo: Reuters
Chinese military medical personnel arriving in Wuhan in February to assist with the coronavirus outbreak response to the February. Photo: Reuters
China’s military may have been spared any coronavirus infections, but the global health crisis has slowed the progress of Chinese President Xi Jinping’s plan to transform the People’s Liberation Army into a modern fighting force capable of long-range power-projecting operations, experts say.
According to China’s defence ministry, the world’s largest armed force – with about 2.3 million personnel – has had zero confirmed cases of Covid-19. In contrast, the US and Russian militaries, ranked second- and third-largest in the world, have reported more than 4,000 and 1,000 respectively.
But the PLA has been affected in other ways by the disease, which was first reported in Wuhan in December before going on to infect 3.9 million people around the world to date.
Safety concerns delayed its annual spring recruitment programme – it has been rescheduled for August – while the PLA Navy was forced to change its training arrangements, switching to classroom study of military theory and tactics, according to Xinhua.
“The PLA is still a conscription army and, given its large turnover of soldiers every year and the late recruitment and training plan this year, the coronavirus pandemic has already affected combat effectiveness,” said Adam Ni, director of the China Policy Centre, an independent, non-profit research organisation based in Canberra, Australia.
China’s military budget will still rise despite coronavirus, experts predict
3 May 2020

The navy’s operations, in particular, would have been affected, according to Charlie Lyons Jones, a researcher from the Australian Strategic Policy Institute’s defence and strategy programme.

“The Chinese navy, short of highly effective disease control measures, is unlikely to avoid similar outbreaks of the novel coronavirus on board its warships,” he said.

“Therefore, even if the PLA Navy currently has zero personnel infected by the novel coronavirus, its position as a navy that can operate effectively in a period of higher-than-normal tension remains precarious at best,” Jones said. He also questioned Beijing’s claims that the military was virus-free.

“The PLA played an important role in China’s response to the coronavirus outbreak in Wuhan … The idea that none of these personnel working on the front lines in Wuhan became infected by the novel coronavirus would be inconsistent with the experiences of countries from around the world,” he said.

More than 4,000 military medical workers were sent to Wuhan as part of China’s effort to contain the outbreak at ground zero – which included the rapid-built emergency field facility, the Huoshenshan hospital – and their efforts were highlighted in a documentary screened recently by state broadcaster CCTV.

China opens coronavirus hospital built in 10 days
At the time, rumours were rampant that the Chinese military had been affected by the coronavirus, fuelled by a report on February 17 by the official PLA Daily that some soldiers had been placed in quarantine and Yu Qiusong, captain of the Changzhou type 054A frigate, was isolating in a guest house. The news report did not mention why the personnel were in quarantine.

But analysts said that whether the official numbers were accurate, the PLA’s closed management, fast response and past experience with severe acute respiratory syndrome (Sars) gave China’s military an advantage in keeping the coronavirus at bay.

Zhou Chenming, a Beijing-based military observer, said a key reason for the less serious hit to the PLA compared to other forces was its speed in recognising the severity of the situation.

“What’s more, the PLA has its own logistic support system that can help minimise its contact with the outside world, thus reducing the possibility of contracting the virus,” he said.

China’s long-range stealth bomber could make its debut this year

4 May 2020

According to Xinhua, the PLA’s Centre for Disease Control and Prevention drew up an emergency response plan and mobilisation arrangements on January 20, the same day Xi issued an instruction to the public that the virus must be “resolutely contained”.

Timothy Heath, a senior international defence research analyst with the Rand Corporation, a US think tank, said China’s military had benefited from its less international role, compared to US forces.

“The US is a globally distributed force while the Chinese military largely operates on the mainland. The US thus faces challenges in containing the disease that the Chinese military does not have to face … and the US military has a large range of missions and tasks it carries out to counter threats to its allies and partners, as well as to US security. This complicates efforts by the US military to carry out disease control measures,” he said.

Source: SCMP

02/11/2019

Chinese scientists create tiny battery capable of working in ultra-low temperatures

  • Team from Dalian Institute of Chemical Physics says its goal is to ‘develop an all-season battery that is low cost but high safety for consumer products’
  • Researchers make breakthrough by using hard carbon and lithium vanadium phosphate
Chinese researchers say they have made a breakthrough in the development of small lithium batteries that can withstand low temperatures. Photo: Xinhua
Chinese researchers say they have made a breakthrough in the development of small lithium batteries that can withstand low temperatures. Photo: Xinhua

Chinese researchers say they have found a way to produce a tiny, lightweight lithium battery for use in mobile phones and electric cars that can hold up to 80 per cent of its charge in temperatures as low as minus 40 degrees Celsius.

The breakthrough came by using a combination of a new material called hard carbon along with lithium vanadium phosphate, the team from the Dalian Institute of Chemical Physics said in a paper published in this month’s edition of the scientific journal Nano Energy.

“Our goal is to develop an all-season battery that is low-cost but high-safety for consumer products,” said Song Zihan, its lead author.

It was an unprecedented approach, but “we proved it works”, he said.

The idea of a battery that can withstand extreme cold is not new. Photo: Shutterstock
The idea of a battery that can withstand extreme cold is not new. Photo: Shutterstock

The idea of a battery that can withstand extreme cold is not new, and they are already in use in space and in the Arctic and Antarctic.

But they tend to be very bulky because of the heating system and large amount of insulation they need to function properly at sub-zero temperatures.

Such measures are neither physically nor economically viable for applications like smartphones, cameras, laptops or electric cars. The trick, Song said, was replacing the soft graphite in normal lithium batteries with hard carbon.

Graphite is a good conductor and often used for the anode at the bottom of a battery, where electrons are generated. But the performance of graphite drops as the mercury slides.

How military tech sparked a robot revolution in firework factories

Song said that hard carbon was a new material that had attracted a lot of research interest in recent years, and compared with graphite, it had a much higher tolerance for the cold.

That was because of its highly irregular and “almost messy” structure, comprising layers of carbon atoms that are interconnected with each other, he said.

However, hard carbon also caused a rapid depletion of the lithium ions that served as an agent carrying the electric flow in battery, he said.

The researchers want to make battery suitable for use in consumer products. Photo: EPA-EFE
The researchers want to make battery suitable for use in consumer products. Photo: EPA-EFE

In the past, researchers have tried adding lithium powders or flakes to improve battery life, but the approach has proven costly and dangerous, mostly because pure lithium is highly reactive.

So Song and his colleagues used a composite material called lithium vanadium phosphate as the positive cathode on top of the battery.

The composite was capable of providing enough extra lithium ions for the hard carbon’s need without increasing the risk of fire or explosion, and it was cheap, he said.

“The pairing of hard carbon and lithium vanadium phosphate worked a charm,” Song said.

But the technology is still a long way from being commercially viable.

The battery Song’s team made is far too small for any real-life applications, and enlarging it would require some “innovative engineering solutions”, he said.

Another scientist involved in the project said the team was working with battery manufacturers to see if the technology could be commercialised.

Source: SCMP

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