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——中国科学院办院方针

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時間:2022-08-16 來源:本站 點擊:258次
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Ukraine, Russia to continue peace talks on Wednesday: Ukrainian negotiator******

Ukraine and Russia will continue their peace talks on Wednesday, Ukrainian Presidential Adviser Mykhailo Podolyak, also a member of the delegation, said on Tuesday.

"We'll continue tomorrow. A very difficult and viscous negotiation process. There are fundamental contradictions. But there is certainly room for compromise," Podolyak tweeted.

The work in subgroups will continue during the break, he added.

The fourth round of negotiations between Ukrainian and Russian delegations started on Monday via video link and continued into Tuesday.

500吨推力!世界最大推力整体式固体火箭发动机在西安试车成功******

世界上冲质比最高、推力最大的整体式固体火箭发动机在陕地面热试车成功。

西部网讯(记者 刘望)由中国航天科技集团第四研究院研制的直径3.5米、推力500吨的高冲质比整体式固体发动机今天(10 月 19 日)在陕西西安地面热试车成功。

世界上冲质比最高、推力最大的整体式固体火箭发动机在陕地面热试车成功。

直径3.5米、推力500吨整体式固体发动机地面热试车成功

据公开资料显示,此前世界上最先进的整体式固体火箭发动机为欧洲的P120C发动机,直径为3.4米、推力400吨。本次试验的高冲质比整体式固体火箭发动机直径3.5米、推力500吨。

高冲质比可以简单理解为:用最小的重量产生最大的冲量。该型发动机是瞄准世界整体式固体发动机最高性能水平,研制的一款大推力、高性能、易使用的先进固体发动机,是当前我国乃至世界上一次浇注成型、具有工程应用意义的冲质比最高、推力最大的整体式固体火箭发动机。

试验结果成功打通了我国千吨级推力固体发动机发展的关键技术链路,验证了多项核心关键技术,标志着固体火箭发动机技术跻身世界领先水平,我国固体运载能力实现大幅提升,可为我国未来大型、重型运载火箭固体动力提供重要技术支撑。

世界上冲质比最高、推力最大的整体式固体火箭发动机。

“整体”和“分段”齐步走 试车成功推动运载火箭立项研制

2009年,航天四院在国内率先研制了直径2米、推力120吨,当时国内最大的整体式固体火箭发动机,推动了长征十一号的立项研制。

2016年,航天四院成功进行了直径两米分段式发动机地面热式车,推力120吨,成功验证了固体发动机分段对接技术,推动了长征六号甲运载型火箭的立项研制。

2019年,航天四院成功研制了直径2.6米,推力200吨的整体式固体发动机,推动了“捷龙—3”商业航天运载火箭的立项研制。

2020年底,我国直径最大、装药量最大,工作时间最长的固体分段式助推器——民用航天3.2米3分段大型固体火箭发动机在航天四院地面热试车成功。

世界上冲质比最高、推力最大的整体式固体火箭发动机。

本次试验也标志着整体式固体发动机推力“120吨、200吨、500吨”三步走计划全面实现,对丰富我国运载火箭动力型谱、提升快速进入空间能力意义重大。

在500吨推力整体式固体发动机的基础上,航天四院正在开展直径3.5米级分段发动机的研究论证,发动机分5段,最大推力将达到千吨以上。

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小孩突发疾病状况危机 西安交警立即护送患者就医******

  11月17日10时左右,群众田女士将印着“感激老百姓好交警队,乐于助人新气象”的锦旗标语送至靖边县派出所交警队城区二中队辅警刘号手上,以表述对她们抢救于危急的感谢之情。

\

  原先,在11月10日,恰逢晚高峰期,车流量饱和状态,机动车行驶迟缓,群众田女士的孩子突发性病症,脸色苍白,孩子状况困境,田女士赶忙将孩子送到医院,但因为田女士内心过度心急,惊慌之时不知道如何开车,正好碰到已经值勤的交警队,田女士马上向辅警表明状况,要求协助,期待交警队可以护卫孩子到医院。

  收到寻求帮助后,辅警刘嘉旭沒有分毫迟疑,向小组长刘号报告后,马上开了田女士的车奔向医院,通过各十字路口协同相互配合,一路“信号灯”,使孩子获得了立即援助,摆脱了风险。中途,辅警刘嘉旭见孩子衣着薄弱,将自身的棉服脱掉给孩子盖紧,见到患者恢复健康后,辅警刘嘉旭静静地离开医院,又重回了职位再次指引疏通交通出行。

  孩子恢复后,田女士却未曾了解那时候公安民警的名称。通过四处探听,她走进了交警队城区二中队,看到了帮她的辅警,把锦旗标语送过来,感激她们在危急关头给与的暖意和协助。

  城区二中队辅警刘嘉旭说:那时候状况的确较为应急,看到被告方的情况下,她心态十分焦虑不安,也很急,因此我便马上向小组长作了报告,坚决地开了田女士的车将他们送至了中医院。碰到这样的状况,大家也仅仅干了自身分类别的事,我就坚信,大家每一位公安民警,碰到这样的状况,都是会像我一样那样做的。

  华商报新闻记者 张成龙。


来源于:华商网-华商报。

编写:方方正正。

Abramovich puts Chelsea soccer club up for sale as clamor for sanctions grows******

AFP

In this file photo taken on May 21, 2017, Chelsea's Russian owner Roman Abramovich applauds, as players celebrate their league title win at the end of the Premier League football match between Chelsea and Sunderland at Stamford Bridge in London.

Russian businessman Roman Abramovich said on Wednesday he would sell Chelsea Football Club, 19 years after buying it and setting the team on a path to sporting glory, and promised to donate money from the sale to help victims in Ukraine.

Amid growing calls for Abramovich to be hit by sanctions after Russia's military operation, the metals magnate said in a statement that a sale was in the best interests of the reigning European and world soccer champions.

"In the current situation, I have therefore taken the decision to sell the club, as I believe this is in the best interest of the club, the fans, the employees, as well as the club's sponsors and partners," he said.

Abramovich said he would not ask for loans he has made to the Premier League club – reported to total 1.5 billion pounds (US$2 billion) – to be repaid to him and the sale would not be fast-tracked.

He has told his aides to set up a charitable foundation that would receive all net proceeds from the sale.

"This includes providing critical funds towards the urgent and immediate needs of victims, as well as supporting the long-term work of recovery," he said in the statement.

Swiss business tycoon Hansjoerg Wyss told a newspaper that he was considering buying Chelsea from Abramovich who over the weekend said he was stepping back from running the club but made no mention of any plans to change its ownership.

"Abramovich is currently trying to sell all his villas in England. He also wants to get rid of Chelsea quickly now. I, along with three other people, received an offer on Tuesday to buy Chelsea from Abramovich," Blick quoted Wyss as saying in an interview published on Wednesday.

Trophy haul

Abramovich bought the West London club in 2003 for a reported 140 million pounds and his investment contributed hugely to the most successful era in the team's history as they won five Premier League titles, five FA Cups and the Champions League twice.

His purchase of the club helped transform the landscape of English football with Chelsea breaking the stranglehold of Manchester United, Arsenal and Liverpool.

They beat Brazilian side Palmeiras last month to become FIFA Club World Cup champions for the first time, having defeated Manchester City to become European champions last season.

"A seismic moment" was how BBC presenter and former England striker Gary Lineker described the announcement ahead of coverage of Chelsea's FA Cup fifth-round tie at Luton Town.

Chelsea fans at Kenilworth Road chanted the Russian's name before kickoff.

The 55-year-old, who has Israeli and Portuguese citizenship, became one of Russia's most powerful businessmen by earning fabulous fortunes after the 1991 break-up of the Soviet Union. Forbes has put his net worth at US$13.3 billion.

British opposition Labour leader Keir Starmer asked Prime Minister Boris Johnson on Wednesday why there had not been sanctions against the Chelsea owner. Johnson, speaking in parliament, said he could not go into details on specific cases.

But Foreign Secretary Liz Truss has warned that she has drawn up a "hit list" of Russian oligarchs and said the government would impose new sanctions on them every few weeks.

The Financial Times said the government was also making plans to seize property owned by Russian oligarchs.

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