越城岭岩体稀土元素分带特征及其对岩体成因的指示意义

以《湖南省越城岭地区稀有稀散金属矿产调查评价》项目为依托,通过数据对比、图解分析等方法,对该区500余件岩石、土壤样进行统计,分析了不同岩相带、土壤垂直分带中稀土元素含量特征及配分模式,讨论了稀土元素对越城岭岩体成因的指示意义。研究结果表明,越城岭岩体各岩相带内稀土元素含量具有明显的差异性,且分带性明显;土壤中稀土相对岩石更富集;该区稀土元素曲线配分右倾;轻稀土相对重稀土较富集;普遍具Eu中等负异常;稀土元素特征指示该岩体具有重熔型花岗岩的特征。     

江苏甘家巷铅锌矿区稀土元素地球化学特征及指示意义

对江苏南京甘家巷矿区铅锌矿床不同类型岩石和矿石的稀土元素地球化学特征进行研究,探讨了岩石和矿石中稀土元素地球化学行为。结果显示：矿床中稀土元素的分布较为一致;甘家巷矿区稀土元素总量变化大,总体来看,稀土总量在铅锌矿石、底砾岩和粉砂岩中相对富集;在稀土元素配分模式图上,轻稀土相对富集,稀土配分曲线向右缓倾,轻稀土元素随原子序数的增加富集程度降低,重稀土元素分布比较平坦。相对较稳定;稀土元素地球化学特征指示甘家巷矿区为受F₂断裂和不整合面控制的中低温热液矿床。     

铁芒萁植物体中稀土元素含量分布的研究

本文叙述了铁芒萁植物体和土壤中稀土元素的ICP发射光谱、UV分光光度和x射线荧光光谱分析测定结果,比较了稀土矿区和非矿区铁芒萁的稀土元素含量,发现矿区铁芒萁叶中含有0.33%的稀土元素(按干叶计氧化稀土),非矿区铁芒萁叶中含有0.19%的稀土元素(按干叶计氧化稀土),研究了铁芒萁不同部位稀土元素分布的状况。本工作为研究稀土元紊对植物生长机理的关系是很有意义的,对利用植物探矿的研究也具有一定意义。     

韧性剪切变形条件下花岗岩中稀土元素变化特征研究

本文对郯庐断裂带南段安徽境内管店花岗岩及其韧性剪切带中的糜棱化岩石进行了主要元素和稀土元素的研究。在详细的野外工作基础上，由岩体向韧性剪切带中心系统测量地质剖面并采集有代表性的岩石样品进行室内分析研究。分析结果显示，随着岩石受剪切变形作用的加强，稀土元素呈富集的趋势。各岩石球粒陨石标准化图解表现为右倾型，即轻稀土富集型。轻稀土也是随着岩石变形作用的加强而较重稀土元素富集。全文详细探讨了韧性剪切变形作用条件下岩石中稀土元素的活化转移的原因，我们认为变质－变形－流体渗滤的联合作用是导致岩石中稀土元素活化转移的主要因素。     

土壤中可给态稀土元素的研究进展

本文综述了土壤中可给态稀土元素与植物生长的相关性，土壤中可给态稀土浸提剂的选择以及定量测定方法的研究，详细讨论了我国主要土壤中可给态稀土元素的含量、分布及其影响因子，并提出在今后研究中应值得关注的几个方面，为合理施用稀土微肥提供科学依据。     

河南卢氏官坡—五里川锑矿带稀土元素特征及与成矿的关系

为了研究河南省卢氏县官坡—五里川锑成矿带成矿机制,对其稀土元素地球化学特征进行分析。锑矿带内锑矿石及其他类型岩石轻、重稀土元素比值较高,且都呈现为Eu负异常,稀土元素配分模式总体上表现为轻稀土富集型。锑矿带内各种类型岩(矿)石中稀土总量分布表现出一定规律性,大理岩、锑矿石中稀土元素总量较高,构造带岩石及附近围岩的稀土元素总量偏低,说明锑矿带的锑及成矿热液主要来自于下地壳和上地幔,热液上升过程中锑矿床经历了多阶段的分馏、交代作用,导致稀土元素从围岩中大量迁出,并富集于锑矿床内。     

贵州织金含稀土生物屑磷块岩稀土元素赋存状态研究

对贵州织金新华含稀土磷矿床进行的稀土元素分析结果表明,磷块岩中含稀土总量ΣREE较高,LREE/HREE比值较大,富集La、Nd、及Y等轻稀土及重稀土元素.普遍具Ce、Eu的负异常,稀土分配模式等显示海相沉积源区继承性及热水源加入特征.生物碎屑、白云石及胶磷矿的单矿物微量元素分析证明,稀土元素含量与胶磷矿密切相关.胶磷矿中稀土元素含量大于其它矿物中稀土含量.扫描电镜及电子探针分析研究表明,稀土元素主要不是以独立矿物形式存在.化学物相分析研究证明,稀土元素多以类质同象形式存在于磷灰石中,少量被粘土矿物相吸附.解决了该类型矿床稀土元素赋存状态长期未解决的问题.综合研究表明,稀土元素赋存状态主要以类质同象形式存在于磷灰石晶格中,稀土元素的含量与胶磷矿密切相关.     

内蒙花山405铀矿微量元素地球化学特征及地质意义分析

内蒙古花山405矿点的微量和稀土元素能为铀矿勘查提供地球化学标志。通过对该地区矿化岩石和围岩分别采样,共对30个微量元素和14个稀土元素进行了对比分析,总结了该地区微量元素和稀土元素的地球化学特征。研究表明,该山群富集W、Re、Ba、Th、U、Pb等元素,而Li、Be、V、Ni、Cu、Rb、Zr、Nb、Mo、In、Cs、Tl、Bi等元素亏损;微量元素在矿化岩石中含量较高,在围岩中相对贫化;此外,该地区稀土元素地球化学特征表现为轻稀土富集,重稀土亏损;Eu在铀矿化岩石中显示弱正异常,在围岩中显示弱负异常,Ce基本没有异常。     

基于GIS的离子型稀土堆浸尾矿区稀土分布研究

以赣县风化壳淋积型稀土堆浸尾矿为研究对象,研究尾矿区土壤中稀土元素的含量及分布状况。采用地统计分析方法研究土壤中稀土含量分布空间变异性,并用克里金法(Kriging)进行空间插值作图。实验结果表明,土壤中稀土含量变异系数都属于中等变异强度以上,其中La元素的变异强度最大,变异系数为170%。空间分布上,Yb的空间相关性较强,La元素的空间相关性最差,其他稀土元素属于居中程度。插值结果显示,土壤中La质量由北到南成阶梯状逐渐减少,其余稀土元素分布情况大致相似,由西北方向到东南方向逐渐增加。     

三代木麻黄林中稀土元素的含量与分布

研究了海南岛滨海砂土上3代木麻黄林生态系统中稀土元素含量和分布。土壤稀土元素分布模式基本上与世界土壤和我国土壤相同,呈负斜率分布,轻稀土相对富集,土壤和植物都存在不同程度的Eu负异常。木麻黄林下砂土的稀土元素总含量很低,从第1代林到第3代林分别为:42.716、45.416、14.457μg/g。植物体中的稀土元素的总含量也很低。从第1代林到第3代林,木麻黄根ΣREE分别为0.722、1.444、1.887μg/g,枝分别为0.354、0.318、0.267μg/g,叶分别为0.492、1.312、0.715μg/g。第3代木麻黄林土壤中ΣREE最低,但根中的ΣREE最高,叶中的ΣREE高于第1代林。表明幼林对稀土元素摄取强烈。在土壤植物—系统中稀土元素分布为土壤>根>叶>粗枝。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.