mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
沟通辅导对医学生人际行为困扰的影响

目的探讨团体训练与心理咨询相结合的辅导方式对医学生人际行为困扰的影响.方法对某医学院校80名医学生进行为期4周的沟通辅导,结合心理学量表分别在辅导前后进行测评,并将辅导前后医学生人际行为困扰因子所测数据进行统计学分析.结果辅导后医学生人际关系困扰检出率显著低于辅导前(32.50%vs48.75%,P<0.05),交谈因子,社会交往,与异性交往以及人际行为总分上显著低于辅导前(P<0.01),待人接物因子明显低于辅导前(P<0.05).沟通辅导对不同年级,专业,年龄,性别的医学生在交谈,社交活动以及与异性交往方面有明显的促进作用(P<0.05,P<0.01).结论通过4周团体训练和心理咨询相结合的沟通辅导,医学生人际关系困扰总检出率明显降低,社会交往活动,与异性交往方面大为改善,人际关系困扰各因子也显著降低.对不同组别医学生在交谈,社交活动以及与异性交往方面都起到了明显的促进作用
木吉村铜(钼)矿床地质特征

河北省涞源县木吉村铜(钼)矿床目前已探明为一大型斑岩型铜(钼)-矽卡岩型铁铜-热液脉型铅锌银"三位一体"多金属矿床.作者结合最新勘查成果,对该矿床的成矿地质背景,矿床地质特征进行了总结,探讨了该矿床的成因和成矿模式.研究表明,木吉村铜(钼)矿床位于山西断窿与燕山台褶带的过渡地带,乌龙沟-上黄旗深断裂带中.该矿床的主要控矿构造为F4断裂,成矿母岩闪长玢岩与古火山构造关系密切.该矿床具有典型的面型蚀变分带及矿化分带.其矿床成因主要为斑岩-矽卡岩型高(中)温热液矿床,以"多位一体"和多阶段成矿为特点
Entanglement Evolution of Three-Qubit States under Local Decoherence

By using negativity as entanglement measure, we have investigated the effect of local decoherence from a non-Markovian environment on the time evolution of entanglement of three-qubit states including the GHZ state, the W state, and the Werner state. From the results, we find that the entanglement dynamics depends not only on the coupling strengths but also on the specific states of concern. Specifically, the entanglement takes different behaviors under weak or strong coupling and it varies with the quantum states under study. The entanglement of the GHZ state and the Werner state can be destroyed completely by the local decoherence, while the entanglement of the W state can survive through the local decoherence partially
进展期胃肠腹腔缓释化疗的研究进展

最新发表的大宗随机化临床研究结果显示: (1)伴有腹膜种植的患者与单纯手术相比, 腹腔内化疗+全身化疗可以提高患者的生存率. (2)在60岁以下患者中, 腹腔内化疗可以提高伴有腹膜癌种植患者的生存率; 相反, 静脉化疗不能改善这类患者的生存. (3)对于无腹膜癌种植的患者而言, 无论腹腔内化疗抑或静脉化疗的效果均不确定
术后高位小肠瘘外科综合治疗一例

在本案例中, 合理的营养支持对高位小肠瘘的治愈起着决定性的作用!在肠道功能严重障碍时给予胃肠外营养, 维持营养代谢的同时又有利于肠道的休息: : 在肠道功能开始恢复后给予肠内营养, 则有利减少肠道黏膜萎缩, 维持消化吸收功能和保证肠道的屏障完整性.肠外营养和肠内营养的完美结合使得此类患者在疾病的不同阶段获得最佳的能量支持. 近年来"免疫营养"的概念在肠内、外营养治疗中越来越受到重视, 对稳定危重患者的内环境起到了画龙点睛的作用
大庆地区革兰阴性杆菌SHV型ESBLs基因型调查

目的了解大庆地区革兰阴性杆菌中SHV型ESBLs基因型的分布状况.方法采用双纸片协同法(DDS),PCR法,检测ESBL阳性革兰阴性杆菌中的SHV基因.结果254株临床分离的多重耐药革兰阴性杆菌中共检出26株携带SHV基因,分别为SHV-28,SHV-12,SHV-5,SHV-1以及SHV-11五种基因型.携带blaSHV基因的细菌主要为肺炎克雷伯菌,大肠埃希菌和阴沟肠杆菌.结论在大庆地区首次检出SHV-28,SHV-12,SHV-5型ESBLs基因,首次检出SHV-1,SHV-11型β-内酰胺酶基因;大庆地区革兰阴性杆菌携带多种类型SHV型ESBLs基因
侵袭性念珠菌病的实验室诊断

随着广谱抗生素,免疫抑制剂及抗肿瘤药物等的广泛应用,侵袭性真菌感染( invasive fungal infections, IFI)的发病率逐年升高.特别是在免疫抑制性疾病,恶性血液系统疾病,干细胞移植和器官移植的患者中, IFI已成为影响预后的重要因素.念珠菌是引起院内血源性感染第4位最常见的病原体[1].侵袭性念珠菌病( invasive candidiasis, IC)病死率高达49%,占IFI总病死率的70% ~87%[2-3].白念珠菌是引起IC最常见的病原菌.近年来,非白念珠菌(non-albicanscandida, NAC)如光滑念珠菌,近平滑念珠菌,热带念珠菌等引起的系统感染明显增多,目前近一半的念珠菌血症由NAC引起[4-5],NAC已经成为我国IC的主要病原菌,占念珠菌血症病原菌的61. 9% ~78. 3%[6-9].NAC血症的增多与预防性使用氟康唑有关[10].这些NAC引起的系统感染预后较白念珠菌感染差[11-12].尤其是对氟康唑不甚敏感的念珠菌,如光滑和克柔念珠菌等引起的IC已经成为临床治疗的难题.而早期诊断和及时抗真菌药物治疗可以改善预后[13].因此,快速,特异地鉴定IC病原体已经成为临床检验的一项重要工作.目前, IC的诊断方法已由传统的镜检和培养法发展到非培养方法,为实验室快速诊断提供了可能
An iterative wavefront sensing algorithm for high-contrast imaging systems

Wavefront sensing from multiple focal plane images is a promising technique for high-contrast imaging systems. However, the wavefront error of an optics system can be properly reconstructed only when it is very small. This paper presents an iterative optimization algorithm for the direct measurement of large static wavefront errors from only one focal plane image. We first measure the intensity of the pupil image to get the pupil function of the system and acquire the aberrated image on the focal plane with a phase error that will be measured. Then we induce a dynamic phase on the tested pupil function and calculate the associated intensity of the reconstructed image on the focal plane. The algorithm will then try to minimize the intensity difference between the reconstructed image and the aberrated test image in the focal plane, where the induced phase is a variable of the optimization algorithm. The simulation shows that the wavefront of an optical system can theoretically be reconstructed with high precision, which indicates that such an iterative algorithm may be an effective way to perform wavefront sensing for high-contrast imaging systems
Photonic crystal fiber-based multi-wavelength Brillouin fiber laser with dual-pass ampliffcation configuration

A simple technique for achieving a stable, room temperature and multi-wavelength lasing with narrow linewidth is demonstrated using Brillouin fiber laser(BFL)with a 100-m-long photonic crystal fiber(PCF) in conjunction with a dual-pass configuration. A broadband fiber Bragg grating(FBG)operating in the C-band region is incorporated at the end side of the setup to allow a dual-pass operation. The proposed BFL can operate at any wavelength depending on the Brillouin pump wavelength and the FBG's reflection region used. With a Brillouin pump(BP)of 15.7 dBm, approximately 7 Stokes and 4 anti-Stokes lines are obtained with a line spacing of 0.08 nm
李东垣消痞丸治疗痞满证209例疗效观察

目的:观察消痞丸对痞满证治疗的临床疗效.方法:以李东垣消痞丸为基本方,对209例痞满证患者进行治疗,并通过治疗前后症状评分变化进行比较分析,评价消痞丸的临床疗效.结果:临床治愈105例,显效26例,有效30例,无效48例,总有效率为77.03%.结论:消痞丸能够有效改善各型痞满证患者的临床症状,且治疗效果满意
<<黄帝内经>>之"神"的考察

神,是中医学相较现代医学的独具特色的一个概念.早在春秋战国时期,古人就已将"神"升华至哲学意义,并将这一概念广泛运用于医学实践.在漫长的文化演变过程中,中华民族的先民对于"神"和自身生命活动逐渐形成了丰富的理论认识与实践经验."神"的概念在中医理论体系中,被赋予诸多与生命密切相关的特征,并成为中医学观念世界里的客观存在,有关"神"的论述属于中医生命观的核心内容.在现代生命科学的知识范畴中,生命活动所主要涉及精神意识,思维活动,情感表达及相关生理功能与病理变化等几个方面,在中医理论体系中均可以"神"统之
体育活动对老年人心理健康的影响

目的研究体育活动对老年人心理健康的影响情况,总结合理的方法用以帮助老年人减少或消除心理健康问题.方法采用问卷调查法及文献资料法,对秦皇岛市3个居民小区及周边地区的老年人就体育活动对其心理健康的影响进行了调查访问.结果研究表明是否参加体育活动对老年人心理健康影响存在显著性差异.经常参加体育活动的老年人比很少参加体育活动或无体育活动的老年人情绪稳定,认知和智力正常,人格建全,人际关系良好,适应能力强,幸福指数高,生活态度积极乐观.结论经常参加体育活动对老年人心理健康具有积极影响
高浓度氧对猪肺动脉内皮细胞钙离子浓度的影响

目的探讨高浓度氧对原代培养的猪肺动脉内皮细胞钙离子浓度的影响.方法原代培养的猪肺动脉内皮细胞分别用高氧刺激不同时间,用双波长荧光分光光度计观察细胞质内钙离子浓度的变化.结果经高浓度氧刺激后内皮细胞生长状态不良,和常氧状态相比,胞内钙离子浓度随刺激时间的延长和氧分压的升高而增高.结论猪肺动脉内皮细胞对高浓度氧刺激耐受性好,高浓度氧能够升高原代培养的猪肺动脉内皮细胞的胞内钙离子浓度
太极柔力球练习对老年人健康指标的影响

目的探讨太极柔力球运动对老年人健康指标的影响,为老年人选择适宜的,健身效果好的运动项目提供参考依据.方法对实验对象先进行20d的36式太极柔力球学习,掌握后配合音乐练习90d,要求每日集中练习40min~1 h,个人自练不少于30min.结果太极柔力球运动能有效地降低老年人BMI值,特别对老年人的腹部皮褶厚度的下降尤为明显(P<0.01);对老年人关节柔韧性的增强有统计学意义(P<0.05).对神经系统灵活性的干预影响体现在反应时的前后数据变化具有统计学意义(P<0.05),闭眼单脚站立具有显著统计学意义(P<0.01);对老年人血液中TG和TC的降低有明显的促进作用(P<0.01),同时能提高老年人HDL含量(P<0.05),有效降低LDL含量(P<0.01)以及Glu的含量(P<0.05).结论太极柔力球可以作为老年人常年健身项目进行普及推广
广西防城港地区1872例成年男性不同年龄段铁蛋白正常参考值范围

目的建立广西防城港地区健康成年男性血清铁蛋白的参考值范围,探讨血清铁蛋白水平的影响因素.方法通过电化学发光免疫法测定1872例20~69岁的健康成年男性血清铁蛋白浓度.结果血清铁蛋白浓度呈偏态分布.20~29岁,30~39岁,40~49岁,≥50岁四个不同年龄组成年男性血清铁蛋白95%参考值范围分别为(82.9~590.8),(89.2~656.8),(90.6~655.9),(39.7~648.4)ng/ml,不同年龄组间血清铁蛋白浓度差异具有统计学意义(P<0.05).体重指数(BMI),饮酒与血清铁蛋白水平独立相关,但吸烟不相关.结论广西防城港地区健康成年男性血清铁蛋白的参考值明显高于目前采用的参考值
Theoretical Investigation on Hyperfine Structures of Perfluoropolyether Radicals

The geometries of CF3OCF2·,CF3OCFCF3·and CF3OCF2CF2·radicals were investigated by density functional theory(DFT)method. The calculated results indicate that all the three radicals have pyramidal shapes at their centers, and theαC is one top of the pyramids. Based on the DFT optimized geometries, the hyperfine coupling constants(hfcc's)of the ~(19)F atoms of the three radicals were calculated by B3LYP,MP2(full)and QCISD(full)methods. The calculated values agree with the experimental values, especially for the a values of Fα, the a values are 125.6×10~(-4),104.2×10~(-4), and 83.2×10~(-4) T of CF3OCF2·,CF3OCFCF3·and CF3OCF2CF2·, respectively. These results better explain the experimental observation
完善我国现代医疗保障制度的建议

我国的现代医疗保障制度与国外的医疗保障制度相比,还存在很多的差异,这与我国的国情和经济发展状况是分不开的.要建立一个发达的医疗保障体系还要走很长的路,当务之急是吸收和借鉴国外先进的保障理念和保障模式完善我国现代医疗保障制度.该文系统地提出了完善我国现代医疗保障制度的建议
蛋壳技术治疗StephensⅠ,Ⅱ型跟骨畸形愈合

[目的]探讨跟骨骨折畸形愈合的一种手术矫形方法.[方法]对32例StephensⅠ,Ⅱ型畸形愈合的跟骨骨折行跟骨外侧骨突的矫形,腓骨长,短肌肌腱及腓肠神经松解,并进行了平均15.3个月的随访观察.[结果]32例跟骨骨折畸形愈合术前按Kerr跟骨骨折评分系统评分,均低于66分,平均45.4分;治疗后24例达87分以上,6例达71分以上,1例68分,1例56分,治疗优良率93.75%.手术前后比较P<0.01,有显著性差异.[结论]矫形治疗StephensⅠ,Ⅱ型跟骨骨折畸形愈合可充分矫正跟骨畸形,改善足部功能
优质杂交稻宜香213在陕西种植表现及高产栽培技术

宜香213在陕西省水稻主产区汉中和安康种植,表现出产量高,品质优,生育期适中,穗大粒多,生长整齐一致等特点,已被陕西作为优质高产杂交稻品种大面积推广.总结了其高产栽培技术
两系杂交中籼稻徽两优6号母本抛秧高产制种技术

2009年在安徽巢湖制种基地进行两系杂交水稻徽两优6号(1892S/扬稻6号变异株)母本抛秧制种20 hm2,平均单产2.96 t/hm2,最高单产3.65 t/hm2,种子纯度99%以上.提出了该组合母本抛秧制种优质高产的配套技术
水稻温敏核不育系株1S原原种海南冬繁技术

株1S原原种海南冬繁采用割蔸后移蔸再生繁殖,产量较高,杂株特别是高温敏株可充分表现,有充足除杂时间,生产的种子纯度好.操作上注意选择好繁殖基地,确定适宜的播期,头茬稻适当密植,少量施肥,浅水灌溉,适时割蔸移栽;再生稻适当稀植,适当喷施多效唑,重施肥,巧灌水,适当拔苞,重点防治纹枯病,稻飞虱,白叶枯病和细条病;除杂工作专人负责,严格剔除高温敏株和普通杂株
Toxicity of copper, lead, and cadmium on the motility of two marine microalgae Isochrysis galbana and Tetraselmis chui

Computer assisted movement tracking was used to characterize the motility of two marine microalgae, Isochrysis galbana and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curvilinear velocity, average path velocity, straight line velocity, linearity, straightness, and wobble. Except for motile percentage, all other motility parameters differed significantly between I.galbana and T.chui. Based on relative motile percentage data, the median effective concentration(EC50)of Cu on the motility of I.galbana and T.chui was 31.4 and 1.3μmol/L, respectively, while for Pb it was 37.8 and 10.9μmol/L and for Cd it was 121.6 and 37.8μmol/L, respectively. Compared to I.galbana,T.chui was more sensitive to all tested metals. The toxic effect of the heavy metals on motility exhibited the following decreasing order for both species: Cu>Pb>Cd.Our results indicate that I.galbana and T.chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays
Mobilities and leachabilities of heavy metals in sludge with humus soil

Chemical forms of Zn, Ni, Cu, and Pb in municipal sewage sludge were investigated by adding humus soil to sludge and by performing sequential extraction procedures. In the final sludge mixtures, Zn and Ni were mainly found in Fe/Mn oxide-bound(F3)and organic matter/sulfide-bound(F4)forms. For Zn, exchangeable(F1), carbonate-bound(F2), and F3 forms were transformed to F4 and residual forms(F5).For Ni,F1 and F2 forms were transformed to F1,F2, and F3 forms. Both Cu and Pb were strongly associated with the stable forms F4 and F5.For Cu,F2 and F3 forms were major contributors, while for Pb,F3 and F4 forms were major contributors to F5. Humus soil dosage and pH conditions in the sludge were strongly correlated with the forms of heavy metals. Five forms were used to evaluate metal mobilities in the initial and final sludge mixtures. The mobilities of the four heavy metals studied decreased after 28 days. The metal mobilities in the final sludge mixtures were ranked in the following order: Ni>Zn>Cu=Pb. Leaching tests showed that the mobilities of Zn and Ni in lower pH conditions(pH 4)were higher than those in higher pH conditions(pH 8)
Characteristics of air pollution by polychlorinated dibenzo-p-dioxins and dibenzofurans in the typical industrial areas of Tangshan City, China

The ambient air in vicinity of different industrial sources for PCDD/PCDFs was sampled by TSP/PM10 active samplers and passive PUF disk samplers in Tangshan City,a metropolis containing clusters of various industrial plants. The TEQ concentrations of PCDD/PCDFs ranged from 44.2 to 394.1 fg I-TEQ/m3 with an average of 169.9 fg I-TEQ/m3.2,3,4,7,8-PeCDF was the dominant contributor to TEQ, contributing 41%(12%to 55%), while 1,2,3,4,6,7,8-HpCDF,OCDD and OCDF were the major congeners for the total concentrations. The ratios of PCDF/PCDD reached 2.54 on average, suggesting that de novo synthesis in thermal processes played an important role to the airborne pollution of PCDD/PCDFs.The similarities congener profiles indicated that TSP and PM10 active sampling methods are comparable for the determination of the PCDD/PCDFs in ambient air, and the ratios of concentrations determined by the two methods suggested that the PCDD/PCDFs tended to stay in fine particles. It was found that 2,3,7,8-TCDF and OCDD were the dominating congeners in the passive PUF disks samples. Through principal components analysis, the coke industry was suggested to be a relatively high potential emission source for PCDD/PCDFs in the ambient air of Tangshan, which was possibly formed by de novo synthesis mechanism. In this study, the atmospheric impacts to the environment from different industrial sources could be ranked as follows(from high to low):coking, iron sintering, steel making, power generation and chlorinate alkali chemical production industries
Formation Mechanism of the Changxing Formation Gas Reservoir in the Yuanba Gas Field, Sichuan Basin, China

In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and diagenetic evolution caused the Changxing Formation to form lithologic traps, with good reservoirs such as dissolved bioclastic dolostone and dissolved pore dolostone. The Changxing Formation gas reservoir is a pseudo-layered porous lithologic gas reservoir under pressure depletion drive, with high H2S and moderate CO2 contents. This paper predictes that the conducting system for the Changxing Formation gas reservoir is possibly composed of the pores and microfractures in the Changxing Formation reservoir, the top erosional surface of the Changxing Formation, as well as the micropores and microfractures in the underlying formations. The Changxing Formation reservoir has experienced 3 hydrocarbon charging stages. This paper suggests that diffusion is the major formation mechanism for this gas reservoir. In the Middle and Late Yanshanian, the Yuanba area entered the major gas charging stage. The gas migrated mainly through diffusion and with the assistance of seepage flow in small faults and microfractures from the source rocks and the other oil-bearing strata to the Changxing Formation carbonate reservoir rocks, forming lithologic gas pools. In the Himalayan Epoch, the lithologic traps were uplifted as a whole without strong modification or overlapping, and were favorable for gas preservation
Fractions and Bioavailability of Soil Inorganic Phosphorus in the Loess Plateau of China under Different Vegetations

Plants play an important role in soil phosphorus nutrition. However, the effect of plants on phosphorus nutrition in soils of the Loess Plateau of China is not well understood. This study was conducted to reveal the relationships between plants and phosphorus' fractions and availability in the Loess Plateau of China. Twenty-two plant communities were surveyed and soil samples under different plant canopies were collected for the determination of soil properties and inorganic phosphorus fractionation. The results showed that Leguminosae and Lilaceae reduced pH and increased organic matter, cation exchange capacity, total and Olsen phosphorus in soils under their canopies, while Labiatae and Rosaceae increased pH and decreased organic matter, cation exchange capacity, total and Olsen phosphorus in soils under their canopies. The contents of Ca2P, Ca8P, Al-P and Fe-P were highly related with soil Olsen phosphorus. They were all higher in soils under Leguminosae and Lilaceae and lower in soils under Labiatae and Rosaceae. The results of this study indicate that Leguminosae and Lilaceae improved phosphorus nutrition in soils, yet Labiatae and Rosaceae impeded the improvement of phosphorus nutrition in soils under their canopies, which will be of more help to instruct vegetation restoration in the region and provide information for soil development
Gravity Flow on Slope and Abyssal Systems in the Qiongdongnan Basin, Northern South China Sea

The study of new seismic data permits the identification of sediment gravity flows in terms of internal architecture and the distribution on shelf and abyssal setting in the Qiongdongnan Basin(QDNB). Six gravity flow types are recognized: (1) turbidite channels with a truncational basal and concordant overburden relationship along the shelf edge and slope, comprising laterally-shifting and vertically-aggrading channel complexes; (2) slides with a spoon-shaped morphology slip steps on the shelf-break and generated from the deformation of poorly-consolidated and high water content sediments; (3) slumps are limited on the shelf slope, triggered either by an anomalous slope gradient or by fault activity; (4) turbidite sheet complexes (TSC) were ascribed to the basin-floor fan and slope fan origin, occasionally feeding the deep marine deposits by turbidity currents; (5) sediment waves occurring in the lower slope-basin floor, and covering an area of approximately 400 km2, were generated beneath currents flowing across the sea bed; and (6) the central canyon in the deep water area represents an exceptive type of gravity flow composed of an association of debris flow, turbidite channels, and TSC. It presents planar multisegment and vertical multiphase characteristics. Turbidite associated with good petrophysical property in the canyon could be treated as a potential exploration target in the QDNB
X-ray Diffraction of Dust Particles in Spring Beijing

X-ray diffractometry was utilized to study the mineralogical characteristics of the inhalable particles (PM10) sampled during two dust storms in Beijing city on March 18th and May 21st, 2008. We confirm, for the first time, that there stably exists ammonium chloride in the atmosphere when temperature is low. The total sulfates particles were affected by relative humidity. Both species and concentration of sulfates decreased first and then grew back by the end of each dust storm. Koninckite, a phosphate mineral never reported as particulate aerosol before, was identified. Meanwhile, our result shows that a chemical modification on dust minerals occurs during long range transportation. PM10 samples collected during the period of dust storms were dominated by crustal minerals such as quartz, illite/smectite, illite, chlorite, feldspar and calcite, and were notably higher in concentration than that in normal periods of time. The amounts of total sulfates, calcite and feldspar altered in each dust storm. It is derived from 24-hour isentropic backward trajectories that two dust events in spring 2008 originated in different sources
Geochemical Characteristics and Geological Significance of Early Permian Baya'ertuhushuo Gabbro in South Great Xing'an Range

Field geological investigation and geochemical analysis are carried out on Baya'ertuhushuo Gabbro in South Great Xing'an Range. Field investigation reveals that the gabbro is a magmatic intrusion rather than a component of an ophiolite suite as previously thought. Zircon laser ablation inductively coupled plasma mass spectroscopy (LA-ICP-MS) U-Pb dating indicates the gabbro was formed in 274-275 Ma, just as the widespread volcanic rocks of Dashizhai Formation (Pad), monzogranites and miarolitic alkali-feldspar granites in the study area. The gabbro has SiO2 content between 47.23 wt% and 50.17 wt%, high MgO and FeOT contents of 6.95-11.29 wt% and 7.32-12.24wt%, respectively, and it belongs to low-K tholeiitic series in the SiO2-K2O diagram. The Chondrite-normalized rare earth element (REE) patterns and primitive mantle-normalized spider diagrams of the gabbro are similar to those of Normal Mid-Ocean Ridge Basalt (N-MORB) except for the enrichment of large ion lithophile elements (LILE), such as Rb, Ba and K. In trace element tectonic discriminative diagrams, the samples are mainly plotted in the N-MORB field, and Zircon in situ Lu-Hf isotopic analysis also indicates the gabbro originated from depleted mantle. Through synthetic studies of the geochemical characteristics and petrogenesis of Baya'ertuhushuo gabbro, volcanic rocks of Dashizhai Formation and granitoids in the area, it is suggested that the early Permian magmatism in the Xilinhot-Xiwuqi area formed in the tectonic setting of asthenosphere upwelling, which was caused by breaking-off of the subducted Paleo-Asian Ocean slab
无心插柳柳成荫----<<艺术中的科学密码>>评介

中国科普作家协会副理事长通常的科普著作,往往是将现有的科学技术知识通俗化.与一般科普著作不同,中国台湾科普作家,科学史家张之杰的<<艺术中的科学密码>>的内容主要来自作者本人的研究成果,采用了大众易于接受的传播方式,作品的原创性是显而易见的,可说这是一本学术性很强的科普图书,或说是一本普及型的学术著作.而且,这本书似乎是大陆笫一次出版台湾科普作家的著作(以前出版的多限于科幻小说或面向少儿的读物).此书内容令人耳目一新,也从一个侧面反映了台湾学界治学理念的开放.作者探索科技史的切入点和研究方法独辟蹊径,别开生面,这对大陆学术界有重要启示
SCI收录的气象与大气科学类期刊介绍

以表格的形式汇总介绍了SCI收录的39种气象与大气科学类期刊的英文刊名,中文刊名,出版地和最新影响因子,并详细介绍了其中影响因子最高的前20种期刊的出版周期,出版地,出版者,联系地址,最新期刊网址等信息.以便为相应学科的科研工作者提供参考
2010年秋季气候对农业生产的影响

2010年秋季(9-11月)全国平均降水量为近10a来同期最多,平均气温比常年同期偏高,平均日照时数比常年同期偏少.入秋以后,农区大部光热条件较好,初霜期接近常年或偏晚,利于秋收作物灌浆成熟和收获晾晒;秋播区大部光温水匹配较好,农业干旱发生范围小,影响轻,对秋播作物播种出苗和幼苗生长有利.但部分地区出现阶段性低温阴雨寡照天气,局地发生暴雨洪涝灾害,不利于秋收作物成熟收晒和秋播作物备耕播种;秋末,北方部分冬麦区出现旱情,冬小麦播种出苗受到影响;另外,秋台风给沿海地区农作物生长发育和水产养殖带来一定损失
应用MSC. Dytran模拟水射流切割猪肝脏组织的仿真研究

医用水刀具有高度的组织选择性和保护性,其选择性和保护性切割等优点,被引入了医学领域并应用于临床,取得了良好的效果.应用MSC. Dytran模拟了水射流切割猪肝脏组织的瞬态过程,仿真结果表明:对于不同的软组织,存在一个合适的水射流压力对其进行准确的切割,而且不会对附近的其他组织或器官造成损伤
超高效液相色谱串联质谱法检测饮用水中卤乙酸

卤乙酸可引起DNA损伤,导致遗传毒性,是饮用水监测中被广泛关注的消毒副产物.我国现行的<<生活饮用水卫生标准>>(GB5749--2006)规定:二氯乙酸和三氯乙酸分别不得超过20和100μg.L-1;WHO推荐的限值分别为50和100μg.L-1;美国EPA则规定一氯乙酸,二氯乙酸,三氯乙酸,一溴乙酸,二溴乙酸的总和不超过60μg.L-1
不同动力公交流动微环境苯系物(BTEX)的浓度水平及健康风险

现代城市人出行大都依赖汽车等交通工具.交通工具使用频率高,影响人群广.目前杭州有532条公交线路, 6889辆公交车,全年的客运量有12. 44亿人次,日平均客运量已达到242. 09万人次.城市公交车流动微环境的空气质量好坏将严重影响城市整体空气质量水平以及市民的身心健康.机动车尾气是城市大气污染中苯系物(BTEX)的重要来源之一.城市公交车司机,乘客在流动微环境中受BTEX污染的健康风险值得探讨的.本文对杭州市现有不同动力公交车(汽油车,柴油车,电车,液化天然气车,油电混合车)车厢和城区主要公交车站台进行BTEX采样和测量,对不同动力公交车司机的致癌风险进行估算并作出相应的健康风险评价
城市污泥中多环麝香的微波萃取-气质联用检测研究

多环麝香具有较强的亲脂憎水性,难降解,容易生物富集,在各环境介质中分布广泛,是一种新型的环境污染物.目前,国内外对污泥中多环麝香的提取主要是索氏提取和超声提取等,很少用到微波萃取,国内尚无相关报道.本研究利用微波萃取预处理污泥样品,以气质联用法SIM方式检测样品中的多环麝香
小议2010国内外生命科学重要进展

转眼间,科学发展已经伴随着人类历史的脚步走过了21世纪的第一个10年. 在过去的几年中,科学技术的不断进步,尤其是生命科学领域的诸多突破性进展向自然充分展示了人类的智慧与创造力,譬如人类和其他生物全基因组的测定,非编码RNA基因调控的发现,诱导多能干细胞技术的建立等等[1]. 仅在刚刚过去的2010年,就有许多令人振奋的生命科学进展,可谓突破迭出. 美国权威杂志Science在 2010年12月17日选出并公布了"2010年十大科学突破",包括: 量子机械、人造细胞、尼安德特人基因组、下一世代的基因组学、RNA的细胞重编程、外显子测序、量子模拟器、分子动力学模拟、大鼠的回归、HIV的预防等[2]. 其中就有8项涉及生命科学领域
EQUIVALENT CONDITIONS OF LOCAL ASYMPTOTICS FOR THE OVERSHOOT OF A RANDOM WALK WITH HEAVY-TAILED INCREMENTS

This article gives the equivalent conditions of the local asymptotics for the overshoot of a random walk with heavy-tailed increments, from which we find that the above asymptotics are different from the local asymptotics for the supremum of the random walk. To do this, the article first extends and improves some existing results about the solutions of renewal equations
基于可定位视频的电子导游系统

以视频描述旅行路线的沿途风光,以二维地图/影像图描述景区的平面信息,并通过空间信息,实现视频和二维电子地图的联动,提出"立面视频+平面地图"的新型电子导游系统.将可定位视频引入导游图,提出基于空间信息的视频分割方案,研究可定位视频的检索和组织方案,最后给出基于可定位视频的电子导游系统设计思路,并通过实例进行验证
<<献血法>>实施10周年浙江省献血者HIV感染情况调查

目的回顾<<献血法>>实施10周年浙江省献血者HIV感染情况,为指导血站相关工作提供科学依据.方法收集浙江省近十年来献血者HIV流行情况的常规资料.结果 1999~2008年献血者4 884 244人,抗-HIV阳性数由1999年6人增至2008年49人,阳性率由1999年1.52/10万增至8.82/10万.(P<0.01).结论抗-HIV阳性数呈逐年增长趋势
锂离子电池负极材料Li4Ti5O12的研究概况(Ⅱ)

高能球磨(HEBM)技术是一种有望用于合成具有微米级或纳米级高性能材料的方法,是利用来之于颗粒与钵体或球体连续不断的碰撞产生的机械能去改善材料的性能或促进固相反应,在高能球磨的过程中,反应物经历了被研磨和进一步混合的过程,对于提高反应速率和修饰材料形貌十分有效,有助于材料性能的改善
塔里木盆地多尺度重力场反演与密度结构

本文根据塔里木盆地布格重力异常的功率谱特征,决定重力异常分解成3个层次,即反映沉积盆地基底的异常,反映沉积盆地深层的异常和反映沉积盆地浅层的异常.然后,探讨将小波变换多尺度分析和密度反演方法应用于塔里木盆地布格重力异常的分解和盆地三维结构密度研究,并根据钻探了解每个层次对应着的地质含义.通过塔里木盆地的重力异常的多尺度分析和密度反演,说明浅层和深层密度扰动信息主要与盆地内古流体活动带有关,即极性为负的浅层密度扰动主要与中生代流体活动带有关,深层负密度扰动信息主要与古生代流体活动带有关.古流体活动是油气聚集成藏的必要条件之一,指出古流体活动带有利于预测油气远景区,体现了这种新方法的科学和应用价值
转基因高表达卵泡抑素1对斑马鱼肌肉生长促进作用研究

抑肌素是转化生长因子β超家族成员,其主要功能是对肌肉的生长发育起负调控作用.在哺乳动物中,抑肌素信号是通过其特异性的与激活素受体ⅡB亚基结合而发挥作用.因此,其信号传递作用可以被其结合蛋白以及ActRⅡB的结合蛋白卵泡抑素所抑制.在小鼠肌肉组织中,高表达卵泡抑素可以导致肌肉组织肌纤维的增生和肥大.为了研究鱼类卵泡抑素是否具有类似的作用,用斑马鱼骨骼肌特异性表达的mylz2启动子,启动斑马鱼卵泡抑素在斑马鱼肌肉组织中的表达.结果发现,多个独立转基因系的肌肉细胞中,成肌调控关键基因myo D和pax7表达升高,且成年斑马鱼体重比对照组略微增加.组织学观察表明,在高表达卵泡抑素的转基因鱼骨骼肌中,肌纤维的数目明显增加,单位面积中肌纤维的数量增加,但肌纤维大小变化不明显.结果表明,高表达卵泡抑素能够通过促进肌纤维增殖的方式促进斑马鱼肌肉生长
珠江三角洲大气气溶胶对地面臭氧变化的影响

研究表明在珠三角目前的污染状况下,至少一半以上的紫外辐射被大气气溶胶衰减,如此大幅度的紫外辐射衰减对城市生态系统和物种化学循环,尤其是臭氧光化学反应过程有重大的影响.利用地面观测的臭氧,紫外辐射,气溶胶辐射特性参数以及辐射和化学模式定量评估了大气气溶胶对地面臭氧影响的显著性.实例分析表明,珠三角大气气溶胶和紫外辐射与臭氧之间的相关性显著,气溶胶光学厚度(AOD)与地面PM10的浓度相关性高达0.98,AOD与相应时次的紫外辐射和臭氧的反相关性明显,相关系数可达-0.9.分析表明气溶胶污染通过衰减紫外辐射可显著降低臭氧的产率,AOD为0.6时臭氧的午间峰值区消失,AOD至1.2时午间峰值区呈下降趋势,造成午间臭氧的生成产率明显降低.目前干季(10,11,12和1月)广州的气溶胶光学厚度AOD550 nm≥0.6(AOD340 nm≥1.0)的出现概率为47%(55%),珠三角在干季出现臭氧极大值的机会少与严重的气溶胶污染抑制臭氧峰值的出现应有密切的关系.分析表明应用辐射化学模式计算气溶胶的辐射效应时对单散射因子(SSA)十分敏感,表明应用辐射化学模式计算臭氧的产率时应慎重选取合理的单散射因子值