mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
窄带成像技术对胃癌高危人群的早期胃癌及肠上皮化生诊断的准确性

中国是胃癌高发国家,且近年来不断有升高趋势。胃癌若能早期发现并及时进行治疗,能减少患者家庭的生命财产损失,减轻社会负担。然而临床上早期胃癌的检出率依然偏低,主要原因在于传统白光内镜下早期胃癌表现不典型。放大内镜(magnifying endoscopy, ME)结合窄带成像(narrow band imaging, NBI)技术作为新型的内镜成像技术,与传统的白光内镜相比,对胃黏膜表面及微血管形态有更高的分辨率。然而,对于在中国胃癌高危人群中使用ME-NBI对早期胃癌和肠上皮化生(intestinal metaplasia, IM)等癌前病变进行早期诊断的临床研究较少。因此,本研究拟评估ME-NBI在胃癌高危人群中检出胃癌的准确性。
电磁导航远端瞄准系统和交锁髓内钉治疗股骨干骨折的效果

股骨干骨折是临床上最常见的骨折之一,约占全身骨折的6%。应用交锁髓内钉技术治疗股骨干骨折的疗效确定,交锁髓内钉手术操作过程中最关键的步骤是锁定远侧锁定孔,徒手锁定技术是目前临床最常用的操作方法。传统的徒手锁定技术在术中需要通过X线透视来定位远侧锁钉孔,手术时间相对较长,且患者和手术者均需暴露于X线辐射下。电磁导航Trigen SureShot~(?)远端瞄准系统可为手术医师提供一种快速、可靠、准确的技术,在安装远端锁钉时无需暴露于X线辐射下。2012年1月-2014年6月安徽医科大学附属安庆医院在21例股骨干骨折患者的治疗中应用电磁导航Trigen SureShot~(?)远端瞄准系统,取得较满意的效果。
Improving coherent averaging line spectrum detection with phase interpolation and compensation

For the purpose of resolving the problem of performance deterioration introduced by inaccurate phase compensation in existing coherent averaging line spectrum detectors, a modified coherent detector is proposed. The three point interpolation in frequency domain is applied to obtain accurate estimate of phase difference between segments when the segmented length is not an integral multiple of the signal period. Then the segmented data are multiplied by a complex coefficient to remove the phase difference and synchronize the phases of all the segments before coherent averaging. Theoretical analysis shows that there will be a gain of 3.9 dB at most by using the modified detector. The detection performance of the incoherent averaging power spectrum detector (AVGPR), the phase coherent averaging detector, the modified coherent averaging detector are compared with each other by computer simulations. The results coincide basically with the theoretical analysis, which show the superiority of the modified detector to the former two detectors.
Feature analysis of acoustic emission sources for rail crack detection by the finite element method

The safety of rail is very important for the development of high speed railway, and it is necessary to investigate the features of inner cracks in rail. In order to obtain the features of Acoustic Emission (AE) sources of inner cracks in rail, AE sources with different types, depths and propagation distances are examined for crack in rail. The finite element method is utilized to model the rail with cracks and the results of experiment demonstrate the effectiveness of this model. Wavelet transform and Rayleigh-Lamb equations are utilized to extract the features of crack AE sources. The results illustrate that the intensity ratio among AE modes can identify the AE source types and the AE sources with different frequencies in rail. There are uniform AE mode features existing in the AE signals from AE sources in rail web, however AE signals from AE sources in rail head and rail base have the complex and unstable AE modes. Different AE source types have the different propagation features in rail. It is helpful to understand the rail cracks and detect the rail cracks based on the AE technique.
超宽带厘米级实时定位技术在监狱管理中的应用

目前,我国监所多数停留在以狱警巡查加摄像机监视报警的阶段,人工作业占绝大比重,信息化程度较低,难以实现对监所内在押人员的实时监管,事故的发现往往具有滞后性,不能起到积极防范和预警作用。另外,信息采集单纯依靠手工输入,无法将信息系统和在押人员真正的关联起来。为了保证监所的管理水平,提高对犯罪嫌疑人的实时状态、改造效率的监控,提高事故反应的及时性,监所的信息智能化建设势在必行。
Yangtze Three Gorges Reservoir, China: A holistic assessment of organic pollution, mutagenic effects of sediments and genotoxic impacts on fish

Besides obvious benefits, the Three Gorges Dam's construction resulted in new pollution scenarios with the potentials to threaten the Three Gorges Reservoir (TGR) ecosystem. In order to record organic contamination, to find links to ecotoxicological impacts and to serve as reference for ensuing monitoring, several sites in the TGR area were screened applying the triad approach with additional lines-of-evidence as a holistic assessment method. Sediments and the benthic fish species Pelteobagrus vachellii were sampled in 2011 and 2012 to determine organic pollution levels, mutagenic potentials and genotoxic impacts. Two regional hot-spots near the cities of Chongqing and Kaixian were identified and further investigated in 2013. Only polycyclic aromatic hydrocarbons (PAHs) could be detected in sediments in 2011 (165-1653 ng/g), emphasizing their roles as key pollutants of the area. Their ubiquity was confirmed at Chongqing (150-433 ng/g) and Kaixian (127-590 ng/g) in 2013. Concentrations were comparable to other major Chinese and German rivers. However, the immense sediment influx suggested a deposition of 216-636 kg PAH/day (0.2-0.6 mg PAH/(m~2·day)), indicating an ecotoxicological risk. PAHsource analysis highlighted primary impacts of combustion sources on the more industrialized upper TGR section, whereas petrogenic sources dominated the mid-low section. Furthermore, sediment extracts from several sites exhibited significant activities of frameshift promutagens in the Ames fluctuation assay.Additionally, significant genotoxic impairments in erythrocytes of P. vachellii were detected (Chongqing/Kaixian), demonstrating the relevance of genotoxicity as an importantmode of action in the TGR's fish. PAHs, their derivatives and non-target compounds are considered as main causative agents.
智慧城市中地理平台的价值研究

分析了地理信息在智慧城市建设中的定位,并提出了地理平台的概念及其在智慧城市中的价值: 空间信息资源共享、泛在信息支撑和协同管理。空间信息资源共享价值在于空间数据的共享及云计算资源转化为云GIS资源的共享; 泛在信息支撑价值在于支撑物联网实时数据接入,提供实时空间分析能力并以地图、短信、E-mail等多形式输出; 协同管理价值体现在人人都能使用地理平台,平台本身的易用性和方便地将各种异构信息空间化的能力是其核心。构建集成、融合、开放、协同的智慧城市地理空间框架是地理平台诸多价值的具体实践。
CORS与静态相对定位技术下的坐标转换研究

目前,CORS已得到广泛应用,如何实现CORS系统得到的CGCS2000坐标与1980西安坐标之间简单、快捷且高精度的转换已成为制约CORS推广的核心问题。本文采用CORS网络RTK与GNSS静态相对定位技术求得区域CGCS2000与1980西安坐标系的高精度转换参数。通过实际工程验证,该方法得到的成果转换精度较高、可靠性较强,不仅可以将CORS系统得到的CGCS2000坐标实时转换到1980西安坐标系,而且为局部1980西安数字线划图转换到CGCS2000坐标系提供了一种方法。
Responses of soil ammonia oxidizers to a short-term severe mercury stress

The responses of soil ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) to mercury (Hg) stress were investigated through a short-term incubation experiment. Treated with four different concentrations of Hg (CK, Hg25, Hg50, and Hg100, denoting 0, 25, 50, and 100 mg Hg/kg dry soil, respectively), samples were harvested after 3, 7, and 28 day incubation. Results showed that the soil potential nitrification rate (PNR) was significantly inhibited by Hg stress during the incubation. However, lower abundances of AOA (the highest in CK: 9.20 × 10~7 copies/g dry soil; the lowest in Hg50: 2.68 × 10~7 copies/g dry soil) and AOB (the highest in CK: 2.68 × 10~7 copies/g dry soil; the lowest in Hg50: 7.49 × 10~6 copies/g dry soil) were observed only at day 28 of incubation (P < 0.05). Moreover, only the community structure of soil AOB obviously shifted under Hg stress as seen through DGGE profiles, which revealed that 2-3 distinct AOB bands emerged in the Hg treatments at day 28. In summary, soil PNR might be a very useful parameter to assess acute Hg stress on soil ecosystems, and the community structure of soil AOB might be a realistic biological indicator for the assessment of heavy metal stress on soil ecosystems in the future.
肾病综合征患者如何合理使用利尿剂

水肿是肾病综合征(NS)患者最常见的临床表现,利尿治疗可改善由于水钠潴留引起的病理生理改变,是NS治疗的基本方法。NS患者水肿产生有两种病生理状况:(1)严重低白蛋白血症,血浆胶体渗透压降低,体液流向组织间液导致水肿,此时常伴循环血容量不足,称为低容量水肿(underfill edema),常见于微小病变型,尤其是血清白蛋白水平<10 g/L、血压正常、肾功能正常者,临床常表现为心动过速、手足冰冷、少尿;(2)肾单位远端功能障碍致原发性水钠潴留,血容量增加伴周身显著水肿,称高容量水肿(overfill edema),见于血清白蛋白水平>20 g/L,尤其是伴高血压、肾功能损害者。
Transcriptomic analysis of human breast cancer cells reveals differentially expressed genes and related cellular functions and pathways in response to gold nanorods

Breast cancer is the leading cause of cancer deaths inwomen.Recent advances in nanomedicine have shown that gold nanorods (AuNRs), as multifunctional drug delivery and photothermal therapeutic agents, have potential for use in cancer therapy. However, the effect of AuNRs on the transcriptome of breast cancer cells is unknown. In the present study, cells of the triple-negative human breast cancer cell line MDA-MB-231, which has high metastatic activity, were treated with AuNRs for transcriptomic analysis using RNA-seq technology. In total, 3126 genes were found to be up-regulated and 3558 genes were found to be downregulated inAuNR-treatedMDA-MB-231 cells. These differentially expressed genes presumably take part in multiple biological pathways, including glycolysis and regulation of the actin cytoskeleton, and impact a variety of cellular functions, including chemoattractant activity. The distinct gene expression profile of MDA-MB-231 cells treated with AuNRs provides a foundation for further screening and validation of important genes involved in the interaction between AuNRs and MDA-MB-231 cells.
Skeletal intramyocellular lipid metabolism and insulin resistance

Lipids stored in skeletal muscle cells are known as intramyocellular lipid (IMCL). Disorders involving IMCL and its causative factor, circulatory free fatty acids (FFAs), induce a toxic state and ultimately result in insulin resistance (IR) in muscle tissue. On the other hand, intramuscular triglyceride (IMTG), the most abundant component of IMCL and an essential energy source for active skeletal muscle, is different from other IMCLs, as it is stored in lipid droplets and plays a pivotal role in skeletal muscle energy homeostasis. This review discusses the association of FFA-induced ectopic lipid accumulation and IR, with specific emphasis on the relationship between IMCL/IMTG metabolism and IR.
Physics-based RNA structure prediction

Despite the success of RNA secondary structure prediction for simple, short RNAs, the problem of predicting RNAs with long-range tertiary folds remains. Furthermore, RNA 3D structure prediction is hampered by the lack of the knowledge about the tertiary contacts and their thermodynamic parameters. Low-resolution structural modeling enables us to estimate the conformational entropies for a number of tertiary folds through rigorous statistical mechanical calculations. The models lead to 3D tertiary folds at coarse-grained level. The coarse-grained structures serve as the initial structures for all-atom molecular dynamics refinement to build the final all-atom 3D structures. In this paper, we present an overview of RNA computational models for secondary and tertiary structures’ predictions and then focus on a recently developed RNA statistical mechanical model—the Vfold model. The main emphasis is placed on the physics behind the models, including the treatment of the non-canonical interactions in secondary and tertiary structure modelings, and the correlations to RNA functions.
The B→D~((*))lν_l decays in the pQCD approach with the Lattice QCD input

In this paper, we studied the semileptonic decays B→D~((*))l-ν_l by using the “pQCD + Lattice QCD” method. We made the extrapolation for the six relevant form factors by using the input values obtained from the pQCD factorization approach in the low q~2 region of 0≤q~2≤m~2_τ and the lattice QCD input at the endpoint q~2=q~2_(max). We then calculated the ratios R(D) and R(D*) of the branching ratios β(B→D~((*))l-ν_l and found numerically that (1) the “pQCD + Lattice QCD”” predictions for the branching ratios β(B→D(~*)l-ν_l agree well with the measured values within one standard deviation; and (2) the “pQCD + Lattice QCD” predictions for the ratios R(D~((*))) are R(D) = 0:337_(-0:037)~(+0:038) and R(D~((*))) = 0.269_(-0:020)~(+0:021); they agree with the data within 2r deviation, in other words, one can explain the “R(D~((*)))-puzzle” in the framework of the Standard Model.
A sky-high view of the Third Pole: an interview with Tandong Yao and Weiming Fan

The Tibetan Plateau and surrounding mountain regions covers 5 million square kilometres—nearly half the China’s landmass—with an average elevation of over 4000 metres. It’s often regarded as the Third Pole because it has the largest stock of ice outside the Arctic and the Antarctic. Tibetan Plateau research is one of China’s Strategic Pioneering Programmes that was launched in 2012 with a budget of 300 million yuan (US $47 million) over 5 years and is led by Chinese Academy of Sciences (CAS)’ Institute of Tibetan Plateau Research (ITP) in Beijing. In January 2014, CAS set up the Centre for Excellence in Tibetan Plateau Earth Sciences, headquartered in ITP, aiming at providing long-term support for this area of research and raising academic standards. NSR recently talked to glaciologist Tandong Yao and geologist Weiming Fan—ITP’s director and deputy director, respectively—about why Tibetan Plateau research is important, what it is like to work there, how the region is faring in face of climate change and why international collaboration is important.
Plant phenological responses to climate change on the Tibetan Plateau: research status and challenges

Phenology studies the cycle of events in nature that are initiated and driven by an annually recurring environment. Plant phenology is expected to be one of the most sensitive and easily observable natural indicators of climate change. On the Tibetan Plateau (TP), an accelerated warming since the mid-1980s has resulted in significant environmental changes. These new conditions are accompanied by phenological changes that are characterized by considerable spatiotemporal heterogeneity. Satellite remote sensing observed widespread advance in the start of the plant growing season across the plateau during the 1980s and 1990s but substantial delay over 2000-2011 in the southwest although it continued to advance in the northeast regions of the TP. Both observational studies and controlled experiments have revealed, to some extent, the positive role of higher preseason temperature and even more precipitation in advancing the leaf onset and first flowering date of the TP. However, a number of rarely visited research issues that are essential for understanding the role of phenology in ecosystem responses and feedback processes to climate change remain to be solved. Our review recommends that addressing the following questions should be a high priority. How did other phenological events change, such as flowering and fruiting phenology? What are the influences from environmental changes other than temperature and precipitation, including human activities such as grazing? What are the genetic and physiological bases of plants phenological responses? How does phenological change influence ecosystem structure and function at different scales and feedback to the climate system? Investigating these research questions requires, first of all, new data of the associated environmental variables, and consistent and reliable phenological observation using different methodologies (i.e. in situ observations and remote sensing).
Engineering property test of kaolin clay contaminated by diesel oil

Engineering property of kaolin clay contaminated by diesel oil was studied through a series of laboratory experiments. Oil contents (mass fraction) of 4%, 8%, 12%, 16% and 20% were selected to represent different contamination degrees, and the soil specimens were manually prepared through mixing and static compaction method. Initial water content and dry density of the test kaolin clay were controlled at 10% and 1.58 g/cm3, respectively. Test results indicate that since part of the diesel oil will be released from soil by evaporation, the real water content should be derived through calibration of the quasi water content obtained by traditional test method. As contamination degree of the kaolin clay increases, both liquid limit and plastic limit decrease, but there’s only a slight increase for plasticity index. Swelling pressure of contaminated kaolin clay under confined condition will be lowered when oil-content gets higher. Unconfined compressive strength (UCS) of the oil-contaminated kaolin clay is influenced by not only oil content but also curing period. Increase of contamination degree will continually lower UCS of the kaolin clay specimen. In addition, electrical resistivity of the contaminated kaolin clay with given water content decreases with the increase of oil content. However, soil resistivity is in good relationship with oil content and UCS. Finally, oil content of 8% is found to be a critical value for engineering property of kaolin clay to transit from water-dominated towards oil-dominated characteristics.
Network-level optimization method for road network maintenance programming based on network efficiency

To maintain their capacity, transportation infrastructures are in need of regular maintenance and rehabilitation. The major challenge facing transportation engineers is the network-level policies to maintain the deteriorating roads at an acceptable level of serviceability. In this work, a quantitative transportation network efficiency measure is presented and then how to determine optimally network-level road maintenance policy depending on the road importance to the network performance has been demonstrated. The examples show that the different roads should be set different maintenance time points in terms of the retention capacities of the roads, because the different roads play different roles in network and have different important degrees to the network performance. This network-level road maintenance optimization method could not only save lots of infrastructure investments, but also ensure the service level of the existing transportation system.
Influence of millisecond time, charge length and detonation velocity on blasting vibration

The law of blasting vibration caused by blasting in rock is very complex. Traditional numerical methods cannot well characterize all the influencing factors in the blasting process. The effects of millisecond time, charge length and detonation velocity on the blasting vibration are discussed by analyzing the characteristics of vibration wave generated by finite length cylindrical charge. It is found that in multi-hole millisecond blasting, blasting vibration superimpositions will occur several times within a certain distance from the explosion source due to the propagation velocity difference of P-wave and S-wave generated by a short column charge. These superimpositions will locally enlarge the peak velocity of blasting vibration particle. The magnitude and scope of the enlargement are closely related to the millisecond time. Meanwhile, the particle vibration displacement characteristics of rock under long cylindrical charge is analyzed. The results show that blasting vibration effect would no longer increase when the charge length increases to a certain extent. This indicates that the traditional simple calculation method using the maximum charge weight per delay interval to predict the effect of blasting vibration is unreasonable. Besides, the effect of detonation velocity on blasting vibration is only limited in a certain velocity range. When detonation velocity is greater than a certain value, the detonation velocity almost makes no impact on blasting vibration.
Sedimentary facies and depositional model of shallow water delta dominated by fluvial for Chang 8 oil-bearing group of Yanchang Formation in southwestern Ordos Basin, China

A systematic analysis of southwestern Ordos Basin’s sedimentary characteristics, internal architectural element association styles and depositional model was illustrated through core statistics, well logging data and outcrop observations in Chang 8 oil-bearing group. This analysis indicates that shallow water delta sediments dominated by a fluvial system is the primary sedimentary system of the Chang 8 oil-bearing group of the Yanchang Formation in southwestern Ordos Basin. Four microfacies with fine grain sizes are identified: distributary channels, sheet sandstone, mouth bar and interdistributary fines. According to the sandbody’s spatial distribution and internal architecture, two types of sandbody architectural element associations are identified: amalgamated distributary channels and thin-layer lobate sandstone. In this sedimentary system, net-like distributary channels at the delta with a narrow ribbon shape compose the skeleton of the sandbody that extends further into the delta front and shades into contiguous lobate distribution sheet sandstone in the distal delta front. The mouth bar is largely absent in this system. By analyzing the palaeogeomorphology, the palaeostructure background, sedimentary characteristics, sedimentary facies types and spatial distribution of sedimentary facies during the Chang 8 period, a distinctive depositional model of the Chang 8 shallow water fluvial-dominated delta was established, which primarily consists of straight multi-phase amalgamated distributary channels in the delta plain, net-like distributary channels frequently diverting and converging in the proximal delta front, sheet sandstones with dispersing contiguous lobate shapes in the distal delta front, and prodelta or shallow lake mudstones.
Kinetics and leaching behaviors of aluminum from pharmaceutical blisters in sodium hydroxide solution

A hydrometallurgical process was developed for recycling pharmaceutical blisters. Leaching aluminum from pharmaceutical blisters using sodium hydroxide (NaOH) solutions was investigated with respect to leaching behaviors and kinetics. A L_9 (3~4) orthogonal design of experiments suggests that the most significant factor is NaOH concentration followed by temperature and leaching time. Factorial experiments demonstrate that the leaching rate of aluminum increases with increasing of the factors. The optimum conditions are temperature of 70 °C, leaching time of 20 min, NaOH concentration of 1.25 mol/L, liquid-to-solid mass ratio of 15:1 and agitation speed of 400 r/min. Under optimum conditions, the leaching rate is up to 100%, implying that aluminum and polyvinyl chloride (PVC) plastic in pharmaceutical blisters are separated completely. Kinetics of leaching aluminum is best described by the product layer diffusion control model, and the activation energy is calculated to be 19.26 kJ/mol.
Effect of different carbon precursors on properties of LiFePO_4/C

The anoxic decomposition and influence of carbon precursors on the properties of LiFePO_4/C prepared by using Fe_2O_3 were investigated. X-ray powder diffractometry, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and carbon content and charge–discharge tests were applied to the characterization of the as-synthesized cathodes. Partial carbon is lost in the anaerobic decomposition of organic precursors and a high hydrogen content leads to a high residual carbon rate. Pyromellitic anhydride and citric acid participate in reactions before and in ball-milling. All the chosen carbon precursors are capable of producing LiFePO_4 with high degree of crystallinity and purity. The carbon derived from α-D-glucose, pyromellitic anhydride, soluble starch, citric acid and polyacrylamide has a loose and porous texture in LiFePO_4/C which forms conduction on and between LiFePO_4 particles. LiFePO_4/C prepared by using α-D-glucose, pyromellitic anhydride, citric acid and sucrose exhibits appreciable electrochemical performance. Graphite alone is able to enhance the electrochemical performance of LiFePO_4 to a limited extent but incapable of preparing practical cathode.
Numerical investigation into effect of rear barrier pillar on stress distribution around a longwall face

Numerical investigation was performed to examine the effect of rear barrier pillar on stress distribution around a longwall face. Salamon theoretical formula was used to calculate the parameters of the caving zone, which was later assigned to double yield constitutive model in FLAC~(3D). Numerical results demonstrate that high stress concentration zone exists above the region where the second open-off cut intersects with the rear barrier pillar due to stress transfer and plastic zone expansion. It is also found that the maximum vertical stresses with varied distance to the seam floor are all within the projective plane of the rear barrier pillar and their positions concentrate on the barrier pillar adjacent to the connection corner of the second open-off cut. In addition, position of the maximum vertical stresses abruptly transfer from the connection corner adjacent to former panel to that adjacent to current panel along the panel direction.