四川新先达测控技术有限公司

KJD－2000R测氡仪 该仪器是一种新型的连续测氡仪器,属标准测量方法之一,它利用静电收集氡衰变子体进行累积测量,灵敏度高,现场获取结果,体积小、重量轻、测量时间短、探测器无污染、性能稳定。     

用离子色谱法测定金矿区水样中常规无机离子

利用DX－120离子色谱仪进行阴阳离子的精密度和准确度测定，100mg/L时相对标准偏差范围为1．00％－3．80％，回收经95．83％－105．00％；5mg／L时相对标准偏差范围为1．18％－4．57％，回收率92．40％－103．20％，完全达到实际要求。用该离子色谱仪测定甘肃阳山金矿山水样中常规无机离子，数据表明该区域水质较好，所测离子浓度都未超过饮用水标准。     

高频红外分析法同进测定煤中碳和硫

报道了高频红外分析仪同时测定煤中碳和硫的方法，可测ω（C）为0％－80％，ω（S）为0％－2.0％。方法经国家一级标准物质分析验证，结果与标准值相符，相对标准偏差（RSD，n=8）C＜1.7％，S＜1.3％。     

四川新先达测控技术有限公司

<正>KJD-2000R测氡仪该仪器是一种新型的连续测氡仪器,属标准测量方法之一,它利用静电收集氡衰变子体进行累积测量,灵敏度高,现场获取结果,体积小、重量轻、测量时间短、探测器无污染、性能稳定。广泛适用于室内测氡、土壤中测氡、水中氡测量、水中镭测量。在地质隐伏断裂揭示、地质工程、建筑测     

HDC——高灵敏度环境测氡仪

HDC———高灵敏度环境测氡仪采用先进的采样测量方法———负高压静电吸附法 ,使仪器的整体性能特别是灵敏度较同类产品有了大幅提高。可用于室内、土壤氡气测量 ,可实时打印输出测量结果 ,给出氡浓度、平衡因子、α能谱曲线图 ,是一种理想的测氡仪器。HDC———高灵敏度环境测氡仪的特点及主要技术指标( 1 )仪器结构紧凑合理 ,体积小、重量轻便于携带 ,操作简单 ,出结果快。仪器有内置电源系统 ,可不受供电条件的影响。( 2 )该仪器在室内测量时 ,采样效率高 ,等效体积达数十升 ,特别是在低氡浓度场合下可获得较高的测量准确度。( 3 )该…     

新疆伊犁盆地南缘512铀矿床镭－氡放射性平衡规律初探

对可供地浸法开采的５１２铀矿床镭－氡放射性平衡规律进行初步研究表明，在对该矿床钻孔施工过程中，由于泥浆压力的存在，使镭－氡放射性平衡遭到破坏，严重地降低了伽玛测井的伽玛照射量率，使按伽玛测并确定的储量计算参数不准确。为此，作者对这一平衡破坏规律进行了初步研究，确定了储量计算参数的镭一氡平衡破坏修正值，既消除了伽玛测井的影响因素，又增加了２０％的远景储量。建议在今后对该矿床进一步工作时，对该平衡破坏规律采用岩芯取样为主，同时辅以适量的专门物探参数观测孔进行验证的研究方案。     

广东省温泉宾馆室内氡来源分析

利用RAD7便携式测氡仪和NR-67A型连续测氡仪测量了广东省一些温泉宾馆室内外氡浓度。从无人入住的宾馆房间内氡浓度的变化来看，土壤氡的渗入是底层房间氡的主要来源。当在浴室内使用温泉水洗浴时，客房内平均氡浓度水平比没有用温泉水时高出10．9％～813％，浴室内氡浓度比没有用温泉水洗浴时高出13．8％～489％。宾馆室内使用温泉水有较高的氡转换系数。某些宾馆室内氡浓度超标。可能对宾馆工作人员造成潜在健康危害，应采取一些管理措施或技术手段降低其暴露水平。     

加拿大本国人居民住宅氡测量—充分利用各种方法对潜在氡进行评价

加拿大卫生福利部希望对全加拿大本国人住宅中的氡的潜在危害进行评价。根据航空伽玛测量数据。地质和地球化学，选择了４１个潜在氡高的居民区的１６个潜在氡低的居民区进行取样，在潜在氡低的居民区中没有一个住宅氡的水平超过４００Ｂｑ／ｍ＾３，而在潜在氡高的居民区中很多住宅超过加拿大的标准８００Ｂｑ／ｍ＾３。根据这一研究结果，加拿大卫生和福利部开始了一项追踪计划，测量住宅中氡浓度可能超过加拿大标准８００Ｂｑ／ｍ     

流动注射在线分离预浓集—同位素稀释—电感耦合等离子体质谱测定地质样品中的铕

建立了一种利用P507树脂微柱在线分离预浓集－同位素稀释－电感耦合等离子体质谱测定地质样品中铕的方法。样品消耗量为7．5mL时，实现了16倍的预浓集因数。通过分析标准地质样品验证了该方法的可行性，结果与标准值一致，相对标准偏差（n＝5）为6．9％－9．2％。用于分析重晶石样品并作加入回收实验，进一步验证了该方法的可行性，回收率为82％－98％。该方法测定Eu的检出限为22ng／L。     

紫外脉冲荧光微量铀分析仪及其应用

本简要介绍了一种新型的紫外脉冲荧光微量铀分析仪(MUA型)，并应用该仪器对岩石、土壤及水系沉积物等样品中的铀进行了分析。结果表明，该仪器具有较高的灵敏度、较强的抗干扰能力和较好的精密度。用该仪器按EJ／T550—2000核工业行业标准方法对国家一级标准物质进行分析，分析结果与其对应的推荐值相符甚好，另外还对3个水平的国家一级标准物质进行精密度试验，相对标准偏差均小于5％。     

东濮凹陷北部沙河街组三段中亚段沉积环境分析

东濮凹陷北部沙三中亚段广泛发育盐岩和烃源岩,这两个看似不能共存的物质却在这里互层共生。该时期研究区沉积特征为多盐韵律与多层烃源岩互层共生、连续沉积,单个盐韵律厚度从几米到十几米,烃源岩有机质丰度高、类型好。平面上,两者在湖盆沉积沉降中心共生;垂向上,高有机质丰度、好干酪根类型与高盐度地层具有较好的对应关系。因而成为恢复古气候和古环境的重要研究对象。通过岩石学、古生物学以及Sr/Ba、B/Ga、(V+Ni+Mn)、Fe/Mn、Sr/Cu、Mg/Ca、V/(V+Ni)、稀土元素含量和氯同位素等方法对凹陷北部沙三中亚段的沉积环境进行研究。结果表明,凹陷北部沙三中亚段为深水沉积的还原环境,古盐度较高,达到半咸水-咸水沉积;微量元素和孢粉化石特征表明研究区沙三中亚段为温暖潮湿的环境。     

The Importance of the Precipitation and the Susceptibility of the Slopes for the Triggering of Landslides Along the Roads

In order to characterise the influence of the heavyrains on the observed landslides during the 1996–1997hydrological cycle, rainfall records for the last 100years are analysed from 104 stations in easternAndalusia. Regarding the amounts of rain recordedbetween October 1996 and March 1997 in the 104stations studied, 31 presented new all-time records;15 presented values that were 80–100% of thepre-1995 record; 49 stations, 80–50%; and 9stations, < 50%. A map has been devised of thesusceptibility of the materials through which thesouth-eastern Andalusian road network crosses,together with an inventory of the damage caused byinstability phenomena on banks and cuttings of theroad network during the winter of 1996–1997. Therelationships between the rainfall during the studyperiod, the damage caused to the road network and thesusceptibility of the materials affected are analysed.The results indicate that there is a clearcorrespondence between the rainfall recorded and thesusceptibility of the materials with the inventorieddamage. It is concluded that the widespread seriousdamage caused in early 1997 to the roads andsurrounding areas in the Alpujarra region and thecoast of the Province of Granada was mainly caused bythe extraordinarily heavy rains. However, considerablyless damage was observed where the susceptibility ofthe terrain is low, thus highlighting the extremeusefulness of terrain-susceptibility maps for riskprevention and territorial planning.     

郯庐断裂南段研究进展与断裂性质讨论

据1：5万区域地质调查和专题研究资料，就郯庐断裂带是否南延与消失的原因，其与大别—苏鲁造山带交截形成的假位错效应，以及与中新生代沉积盆地形成演化的关系等作了新的阐述。在此基础上，讨论了郯庐断裂带是否为巨大的左行平移断层或转换断层。认为郯庐断裂带可能是在“古郯庐带”的基础上于早侏罗世重新活动、白垩纪强烈活动的地堑型枢纽断裂带。     

塘口水电站坝基岩体透水性和渗漏问题分析

塘口水电站大坝基础座落在断层和裂隙较发育的龟裂纹灰岩上,岩体完整性差、透水性强,多年运行后,大坝灌浆廊道和排水廊道出现多处集中性漏水,为确保大坝安全和电站正常发电,根据渗漏性质和成因,采用对灌浆廊道补充帷幕灌浆,对排水廊道进行固结+帷幕+回填灌浆。通过灌浆处理后,效果良好,表明灌浆工程有效的将导致坝基渗漏的上下游的裂隙通道封闭,并顺利的经受了随后的汛期洪水考验,大坝安全得到保障。     

Unity of the national and the international in the socio-cultural development of the peoples of the USSR

International unity is becoming ever stronger in this country owing to an increasing similarity in the development of the cultural environment. This comprises the provision of all the country's republics with a sufficient number of schools, theatres, and other institutions and cultural information media in accordance with the needs of the population. An important part is played by the rise in ‘the general educational level, as well as the level of professional qualifications and skills. Among all the Soviet nations and nationalities, this rise being more rapid among formerly backward peoples. Prominent among the factors of internationalization is the progressive development of the nationalities’ cultural resources, while professional culture is being increasingly brought within the reach of the masses.The implementation of the nationalities policy promotes the all-round development of all Soviet nations and nationalities, their drawing together, the upsurge of the individual capabilities of every Soviet citizen.     

Calculation of the Inverse of the Covariance

In reservoir characterization, the covariance is often used to describe the spatial correlation and variation in rock properties or the uncertainty in rock properties. The inverse of the covariance, on the other hand, is seldom discussed in geostatistics. In this paper, I show that the inverse is required for simulation and estimation of Gaussian random fields, and that it can be identified with the differential operator in regularized inverse theory. Unfortunately, because the covariance matrix for parameters in reservoir models can be extremely large, calculation of the inverse can be a problem. In this paper, I discuss four methods of calculating the inverse of the covariance, two of which are analytical, and two of which are purely numerical. By taking advantage of the assumed stationarity of the covariance, none of the methods require inversion of the full covariance matrix.     

某高速公路下伏煤矿采空区稳定性分析

在论述某高速公路下伏砦脖煤矿采空区地质、采矿和工程地质特征的基础上, 进行了稳定性数值模拟分析, 定性与定量地分析与评价了该煤矿采空区的地表变形特征及稳定性。研究结果表明: 该煤矿采空区的变形尚未完成, 对拟建的高速公路将产生很大的危害, 必须采取相应的工程治理措施。      

Report of the restudy of the defined global stratotype of the base of the Silurian System

The Global Stratotype Section and Point （GSSP） for the base of the Silurian System was defined in 1985. Since that time, a number of researchers have suggested that this section has serious deficiencies for use as a GSSP. As a result, in 2000, the Subcommission on Silurian Stratigraphy （SSS） proposed undertaking a formal restu@ of this GSSP, which was subsequently approved by the International Commission of Stratigraphy （ICS）. The result of this restudy was the formal proposal that the current GSSP, at 1.6 m above the base of the Birkhill Shale, at Dob＇s Linn, Scotland, should be maintained as the same locality and stratigraphic level, but the bios- tratigraphical definition of the boundary should be revised. The previously defined, basal Silurian grapto- lite zone, the Parakidograptus acuminatus Zone, should be subdivided into a lower Akidograptus ascensus Zone and a higher E acuminatus Zone. The base of the A. ascensus Zone, marked by the first appearance of A. ascensus, should be regarded as the biostratigraphic mark for the base of the Silurian. This proposal has now been formally approved by the SSS and ICS, and ratified by International Union of Geological Sciences. This is the first GSSP to undergo formal restudy and redefini- tion, and the proposal also included a recommended procedure for restudy of GSSPs.     

Deviation of the major axis of the inertia ellipsoid of the Moon from the direction toward the Earth

It is known from observations that the center of mass of the Moon does not coincide with the geometric center of its figure, and the line connecting these two centers is not aligned with the direction toward the center of the Earth, instead deviating toward the Southeast. This stationary deviation of the axis of the inertia ellipsoid of the Moon to the South of the direction toward the Earth is analyzed. A system of five linear differential equations describing the physical libration of the Moon in latitude is considered, and these equations are derived using a new vector method taking into account perturbations from the Earth and partly from the Sun. The characteristic equation of this system is obtained, and all five oscillation frequencies are found. Special attention is paid to the fifth (zero) frequency, for which the solution of the latitude libration equations are stationary and represents a previously unknown additional motion of the rotational axis of theMoon in a cone with a small opening angle. In contrast to the astronomical precession of the Earth, the rotation of the angular-velocity vector is in the positive direction (counter-clockwise), with the period T ₃ = 27.32 days. On this basis, this phenomenon has been named “quasi-precession.” This quasi-precession leads to a stationary inclination of the major axis of the inertia ellipsoid of theMoon to the South (for an observer on Earth), making it possible to explain one component of the observed deviation of the center of mass of the Moon from the direction toward the Earth. The opening angle of the quasiprecession cone is approximately 0.834″.     

Artemia in the Salt Lakes of Russia:the Productivity of Populations,the Reserves of the Cysts and the Fisheries

正Artemia cysts are an extremely important component of aquaculture diets.It is well established that the cultivation of fish and shellfish derive substantial health and growth advantages when Artemia are included in the diets of the