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放射性核

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We have established the perfect metrological standard equipment and calibrating method, we have had the ability to provide the metrological assurance for the environmental radioactivity air survey.

在核设施退役过程中,通过航测全面掌握拟退役核设施及周围地区的放射性辐射现状,为核设施退役的放射性治理在范围和程度上提供了科学有效的数据,可以有效地支持核设施的安全退役。

There are 8.6%~10.91% foreign matter in the sphenes, in which radioactive elements of strontium, cesium and uranium range from 4.26% to 4.58%. The change of structural cell parameters of sphenes is still very little,Δa=-0.0009 nm~0.0041 nm,Δb=0.0018 nm~0.0004 nm,Δc=0.0002 nm~0.0048 nm,Δβ=-0.10°~0.09° with high crystallinity of 99.27%~96.46%. Though, the age of sphene from the Fenghuang Mountain is about 1000 Ma, and experienced 775 Ma~1758 Ma geological evolvement and alpha decay, its crystallinity only decreased 3%, and its crystal shape and structure are still fine, indicating that sphene is of good ability to solidify radioactive elements. Therefore, sphenes are ideal minerals for solidifying nucleus waste.

通过对北祁连牛心山变质杂岩体中榍石(775Ma)和山西凤凰山花岗岩中榍石(1758Ma)的XRD及EDS等测试与研究,结果表明:两地榍石的杂质元素质量分数高达8.6%~10.91%,放射性核素锶、铯和铀的质量分数达4.26%~4.58%;晶胞参数的变化极小,△a=-0.0009nm~0.0041nm、△b=0.0018nm~0.0004nm、△c=0.0002nm~-0.0048nm、△β=-0.10°~0.09°,结晶度仍高达99.27%~96.46%,榍石经过10×10^8a的地质作用,结晶度仅减少了3%,显示榍石固化放射性系列核素的能力较强,虽经历了约775Ma~1758Ma的复杂地质演化及其所含放射性核素的衰变作用,其晶体结构完好,稳定性极高,是值得期待的理想核废物固化矿物。

At 24 and 48 h after [3H]tricyclopinate, both total and binding radioactivity were still seen in caudate putamen.

24和48 h,总放射性和结合放射性在脑的尾壳核仍有弱的影像显示。

Basic nuclear physics and fundamental measuring techniques: The basic nuclear physics involves the main types of nuclear decay, law of decay, definition and units of radioactivity and the interaction of radiations and materials.

核物理基础与放射性测量技术:内容主要是核衰变的四种类型、衰变规律、放射性活度及其单位;射线与物质的相互作用,以及γ计数器及液体闪烁仪测量的基本原理和放射性测量的统计误差。

Which is the most important and is the most complicated, moreover, which can provide the basis for decommission method and budget estimation.

为使这些核设施退役达到合理和最优化,就要求我们先充分了解和认识核设施内部的放射性状态,为此需要进行核设施的初始特性调查。

That is a lot better than nothing, at least for nuclear fallout (for which the model was first developed): there the case for being safe not sorry is overwhelming, and once the fallout has fallen, a Geiger counter will tell you whether the model's forecasts of which places would be affected have turned out to be right.

但是,有个宽泛的概念总比什么都没有好,至少对核放射性微尘是如此,而这种电脑模型最初就是为核放射性微尘而研制出的,因为在这方面,未雨绸缪显得十分重要。且一旦放射性微尘沉降下来,盖格计数器就会告诉你模型所预报的受影响地区是否准确。

So far found that there are more than 2800 kinds of nuclides, in addition to 271 kinds of stable isotope and the rest are about 2530 kinds of radiation nuclide, including natural and artificial radionuclides radionuclides.

到目前为止发现的核素有2800多种,除271种是稳定的核素,其余约有2530种是放射线核素,包括天然放射性核素和人工放射性核素。

The agreement establishes a process to collaborate with each other and with the International Atomic Energy Agency on export controls, international nuclear safeguards, protection of nuclear materials and facilities, nuclear emergency management and radioactive source security, it said.

这一协议为双方的合作,以及国际原子能组织控制下的核能出口,国际核安全、核原料的安全和保护、核问题紧急的处理、放射性核能的安全问题,都作出了建设性的贡献。

A 300-Year Error-----Three-Hundred-Year Devil's DEN on NB of SNB, Two Decrypting Equation Books of 《 The Laws (ISBN1442131241)》 and 《 The Laws Plus (ISBN144213285X)》; A Three-Hundred-Year Error's Decryption, The Sword of the Third Signorino—Nostradamus' Sword of Great Seven Number that Makes the Global 6.5 Billions People Be Not Any More Buried Alive by the Earthquake in the World; Ali Baba and the Forty Thieves Open Simsim to the Sun and Moon Treasure House of the God to Get the Heaven's Nuclear Cimelia: Nuclear Les Trois Mousquetaires and Big Three's Triumvirate Carry out Three Nuclear Controls and Monitors to Make the Global 6.5 Billions People No Longer Lie Under Big Deathful Nuclear Radiation Here and There

全球拉响核警报:核泄露、核块熔化,全球15%以上核弹参与,同时大面积污染土壤和水资源,全球80%以上的人遭受严重核放射性照射辐射一个300年的错误;两本解密方程书《 The Laws (ISBN1442131241)》和《 The Laws Plus (ISBN144213285X)》;三百年错误的纠正令全世界65亿人从此不用再被地震无情活埋和被海啸无望吞噬;核三剑客令全世界65亿人从此不用再遭受致命核辐射

3 Patients were in the acutestage,〓FDG and 〓NH〓 PET showed brain stem infarction in 2 patients, while CT was normal. MRA of one of them showed right vertebral artery obstruction. One case showed focal infarction within the territory of the right middle cerebral artery 12 hours after stroke onset.〓NH〓 uptake was reduced in right frontoparietal lobe, putamen and part of thalamus, while hyperperfusion was observed in ipsilateral head of caudate nucleus and a portion of thalamus.

急性期3例,2例〓FDG和〓NH〓均示病灶位于右侧脑干为放射性缺损区,CT检查均未显示,1例MRA示右侧椎动脉阻塞:另1例〓FDG示病灶在右侧大脑中动脉区域,与12小时CT所示病灶范围相同,但12小时的〓NH〓示右侧额、顶叶,壳核和部分丘脑为放射性减低和缺损区,而同侧尾状核头部和部分丘脑为过度灌注;发病24小时〓FDG显示除〓NH〓所见缺损区外,右侧额、顶叶部分区域和右侧尾状核头部代谢异常增高,血流和代谢有不一致处。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。