mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Wave reflection in semiconductor nanostructures

Based on nonlocal thermoelastic theory, this article studies the reflection of waves in nanometer semi-conductor media. Firstly, the governing equations are established based on coupled nonlocal elasticity theory, plasma diffusion equation, and moving equation. Then, using the harmonic method, the solution of the dissipation equation and the analytic expression of the reflection coefficient rate are obtained. Finally, the influences of nonlocal parameters on wave velocities are showed graphically. It is found that after the introduction of nonlocal effect, the phase and group velocities all show the attenuation, and as the frequency increases, the nonlocal parameter is bigger, and the decay rate is faster. The reflection coefficient rate varies greatly with different theories, with different reflection coefficient rates depending on the incident angle.
Heat transfer of micro-droplet during free fall in drop tube

To explore the heat transfer of micro-droplet during free fall in the drop tube, the falling velocity and microgravity level are calculated. The Newtonian heat transfer formulation is coupled with the classical heat conduction equation to predict the heat transfer process within micro-droplet. Based on the numerical solution by finite difference method with implicit Euler scheme, the temporal evolution of thermal information inside micro-droplet is obtained including the temperature distribution, cooling rate, temperature difference and gradient. To quantitatively reveal the mechanism how the various factors affect the heat transfer of micro-droplet, the effects of physical properties of liquid metal and cooling gas as well as the micro-droplet size are studied. As the important indicators of heat transfer process, the cooling rate and temperature difference are acquired to systematically investigate the relationship between thermophysical properties and heat transfer process of different metallic micro-droplets.
Determination of residual stress distribution combining slot milling method and finite element approach

Residual stress plays a vital role in the structural strength and stability. The determination of residual stress at single-point has become mature at present. However, the method to determine residual stress distribution is still in shortage. For this problem, a finite element approach combined with slot milling method was developed in this study. In the method, firstly a slot is milled on the specimen surface to release the residual stress and then the released displacement field is measured by optical method, such as digital image correlation (DIC), finally the finite element approach is used to determine the residual stress distribution along the slot. In order to verify the feasibility of the method, it was applied to study the residual stress introduced by shot peening, mainly about the stress distribution along the direction vertical to the shot peened surface. Since the influence depth of shot peening was too small, we utilized focused ion beam (FIB) to determine the microscale residual stress distribution. The result measured by X-ray diffraction (XRD) demonstrated that the method was feasible to determine the residual stress distribution.
Investigation of the spike-stall warning method using the blade passing signal

The vaned-diffuser usually brings compressor instability problems under the small flow rate, for instance the spike-type rotating stall phenomenon which restricts the operation range and may cause the trouble of blade fatigue. Since it is difficult to mathematically predict the spike-type stall for its randomness, finding out a practical method to warning this stall precursor appears to be meaningful. The paper explains the relationship between the spike-type precursor and the blade passing irregularity coefficient to analyze whether this coefficient is appropriate for the spike-stall warning inside a centrifugal compressor with the vaned-diffuser. The advanced wireless measurements were conducted on a 1.5 stages test centrifugal compressor to capture the unsteady behavior progressing from the design to stall inception within the region between the impeller trailing edge (TE) and diffuser leading edge (LE). The circumferential distribution of the blade passing irregularity has been quantitatively revealed. The steep increase of the blade passing irregularity at some “special locations”, which is responsible for the onset of the spiketype precursor, is highlighted. Also, to further understand the spike precursor inside the diffuser passage corresponding to the circumferential “special location” with maximum irregularity, the high-response transient measurement within this passage is presented. With the help of full-annulus computational fluid dynamics (CFD) simulation and the mathematical model, it is proved that the blade passing irregularity precisely reflects the flow characteristics during the spike precursor, which presents the guidance for this stall warning method.
Exploring seasonal acidification in the Yellow Sea

The Yellow Sea on the western continental margin of the North Pacific Ocean is of major ecological and economic importance. Four field surveys were conducted during May and November 2012, August 2015, and January 2016, investigating seasonal variations in dissolved oxygen and carbonate system parameters of this marginal sea. Results showed that the Yellow Sea cold water mass accumulated respiration-induced CO_2 in subsurface and bottom waters in summer and autumn, leading to acidified seawaters with critical carbonate saturation states of aragonite (Ω_(arag)) of less than 1.5. These seriously acidified seawaters occupied one third of surveyed areas in summer and autumn, likely affecting local calcified organisms and benthic communities. In a future scenario for the 2050s, in which the atmospheric CO_2 mole fraction increases by 100 μmol mol~(-1), half of the Yellow Sea benthos would be seasonally covered by acidified seawater having a critical Ω_(arag) of less than 1.5. The corresponding bottom-water pHT would be around 7.85 in summer, and 7.80 in autumn. Of the China seas, the Yellow Sea cold water mass represents one of the ecosystems most vulnerable to ocean acidification.
Coastal blue carbon: Concept, study method, and the application to ecological restoration

Coastal blue carbon refers to the carbon taken from atmospheric CO_2; fixed by advanced plants (including salt marsh, mangrove, and seagrass), phytoplankton, macroalgae, and marine calcifiers via the interaction of plants and microbes; and stored in nearshore sediments and soils; as well as the carbon transported from the coast to the ocean and ocean floor. The carbon sequestration capacity per unit area of coastal blue carbon is far greater than that of the terrestrial carbon pool. The mechanisms and controls of the carbon sink from salt marshes, mangroves, seagrasses, the aquaculture of shellfish and macroalgae, and the microbial carbon pump need to be further studied. The methods to quantify coastal blue carbon include carbon flux measurements, carbon pool measurements, manipulative experiments, and modeling. Restoring, conserving, and enhancing blue carbon will increase carbon sinks and produce carbon credits, which could be traded on the carbon market. The need to tackle climate change and implement China's commitment to cut carbon emissions requires us to improve studies on coastal blue carbon science and policy. The knowledge learned from coastal blue carbon improves the conservation and restoration of salt marshes, mangroves, and seagrasses; enhances the function of the microbial carbon pump; and promotes sustainable aquaculture, such as ocean ranching.
Soil pH determines fungal diversity along an elevation gradient in Southwestern China

Fungi play important roles in ecosystem processes, and the elevational pattern of fungal diversity is still unclear. Here, we examined the diversity of fungi along a 1,000 m elevation gradient on Mount Nadu, Southwestern China. We used MiSeq sequencing to obtain fungal sequences that were clustered into operational taxonomic units (OTUs) and to measure the fungal composition and diversity. Though the species richness and phylogenetic diversity of the fungal community did not exhibit significant trends with increasing altitude, they were significantly lower at mid-altitudinal sites than at the base. The Bray-Curtis distance clustering also showed that the fungal communities varied significantly with altitude. A distance-based linear model multivariate analysis (DistLM) identified that soil pH dominated the explanatory power of the species richness (23.72%), phylogenetic diversity (24.25%) and beta diversity (28.10%) of the fungal community. Moreover, the species richness and phylogenetic diversity of the fungal community increased linearly with increasing soil pH (P<0.05). Our study provides evidence that pH is an important predictor of soil fungal diversity along elevation gradients in Southwestern China.
Product yields of stabilized Criegee intermediates in the ozonolysis reactions of cis-2-butene, 2-methyl-2-butene, cyclopentene, and cyclohexene

Cavity ring-down spectroscopy (CRDS) was utilized in combination with chemical titration with sulfur dioxide (SO_2) to quantify stabilized Criegee intermediates (sCIs) produced at low pressures (4–20 Torr) in ozonolysis reactions of cis-2-butene, 2-methyl- 2-butene, cyclopentene, and cyclohexene. The yield of stabilized sCI, acetaldehyde oxide (CH_3CHOO), from cis-2-butene ozonolysis decreased with decreasing pressure and reached to 0.05±0.04 at the zero-pressure limit. The nonsymmetric alkene 2- methyl-2-butene produced two stabilized sCIs, CH_3CHOO and acetone oxide ((CH_3)_2COO), and their total yield decreased with decreasing pressure and reached 0.01±0.03 at the zero-pressure limit. For cyclopentene and cyclohexene, the sCI yields were essentially constant near zero, as expected of endocyclic alkenes. The nascent yields of sCI of various alkenes are compared.
Efficient red phosphorescent OLEDs based on the energy transfer from interface exciplex: the critical role of constituting molecules

A novel acceptor material, 9-(4'-(4,6-diphenyl-1,3,5-triazin-2-yl)-[1,1'-biphenyl]-3-yl)-9H-carbazole (o-DTPPC) was developed to form interface exciplex with commonly used donors, to maximize the performances of red phosphorescent organic light emitting diodes (PHOLEDs). It is found that the exciplex involving 4,4'-(cyclohexane-1,1-diyl)bis(N,N-di-p-tolylaniline) (TAPC) exhibits the most significant thermally activated delayed fluorescence (TADF) property, derived from the high triplet energy level as well as strong hole-transporting ability of TAPC. Intriguingly, it is the same donor-acceptor combination which achieved the highest device efficiency when adopted as the host for red PHOLEDs. Maximum efficiencies as high as 31.36 cd A~(-1),17.95 lm W~(-1), and 21.01% for the current efficiency, power efficiency and external quantum efficiency, respectively with low efficiency roll-off were realized. The improved performance can be attributed to the efficient TADF properties of the interface exciplex-forming host constituting TAPC, benefiting the Forster energy transfer. The article first underlines the importance of the constituting molecules in the interface exciplex-forming hosts, shedding new insight about the choice of interface exciplex as the host for PHOLEDs, which may lead to even higher performances, paving their ways towards practical applications.
Root microbiota shift in rice correlates with resident time in the field and developmental stage

Land plants in natural soil form intimate relationships with the diverse root bacterial microbiota. A growing body of evidence shows that these microbes are important for plant growth and health. Root microbiota composition has been widely studied in several model plants and crops; however, little is known about how root microbiota vary throughout the plant’s life cycle under field conditions. We performed longitudinal dense sampling in field trials to track the time-series shift of the root microbiota from two representative rice cultivars in two separate locations in China. We found that the rice root microbiota varied dramatically during the vegetative stages and stabilized from the beginning of the reproductive stage, after which the root microbiota underwent relatively minor changes until rice ripening. Notably, both rice genotype and geographical location influenced the patterns of root microbiota shift that occurred during plant growth. The relative abundance of Deltaproteobacteria in roots significantly increased overtime throughout the entire life cycle of rice, while that of Betaproteobacteria, Firmicutes, and Gammaproteobacteria decreased. By a machine learning approach, we identified biomarker taxa and established a model to correlate root microbiota with rice resident time in the field (e.g., Nitrospira accumulated from 5 weeks/tillering in field-grown rice). Our work provides insights into the process of rice root microbiota establishment.
Nanotherapeutic approaches targeting angiogenesis and immune dysfunction in tumor microenvironment

Tumor microenvironment (TME) comprising cellular and non-cellular components is a major source of cancer hallmarks. Notably, angiogenesis responsible for normal physiological remodeling process can otherwise harness vessel abnormalities during tumorigenesis eliciting severe therapeutic inefficiency. Currently, FDA approved antiangiogenic drugs have only shown modest clinical success owing to tumor hypoxia, antiangiogenic therapeutic resistance, and limited knowledge in understanding TME. In order to overcome these limitations, targeting angiogenesis combined with immunosuppressive TME could offer potential therapeutic opportunities. Indeed, these therapeutic approaches can be further revisited with the advent of nanotechnology that can target the key cellular components of TME and tumor cells more precisely. Synergetic targeting without eliciting systemic toxicity achieved by integration of antiangiogenic and immunotherapy in a single nanoplatform is vital for therapeutic success. In this review, we will discuss the most promising nanotechnological advancements oriented to modulate the immunosuppressive TME in association with antiangiogenic therapy that has gained immense popularity in cancer treatment.
Cubic vertex-transitive non-Cayley graphs of order 12p

A graph is said to be vertex-transitive non-Cayley if its full automorphism group acts transitively on its vertices and contains no subgroups acting regularly on its vertices. In this paper, a complete classification of cubic vertex-transitive non-Cayley graphs of order 12p, where p is a prime, is given. As a result, there are 11 sporadic and one infinite family of such graphs, of which the sporadic ones occur when p equals 5, 7 or 17, and the infinite family exists if and only if p ≡ 1 (mod 4), and in this family there is a unique graph for a given order.
Magnetic nanoparticles based cancer therapy: current status and applications

Nanotechnology holds a promising potential for developing biomedical nanoplatforms in cancer therapy. The magnetic nanoparticles, which integrate uniquely appealing features of magnetic manipulation, nanoscale heat generator, localized magnetic field and enzyme-mimics, prompt the development and application of magnetic nanoparticles-based cancer medicine. Considerable success has been achieved in improving the magnetic resonance imaging (MRI) sensitivity, and the therapeutic function of the magnetic nanoparticles should be given adequate attention. This work reviews the current status and applications of magnetic nanoparticles based cancer therapy. The advantages of magnetic nanoparticles that may contribute to improved therapeutics efficacy of clinic cancer treatment are highlighted here.
青藏高原地区湖泊正构烷烃有机单体氢同位素组成及其水文与环境应用

湖泊沉积物中正构烷烃氢同位素组成(δD)广泛应用于古环境变化研究,但其正构烷烃通常包含多种植物来源,使其作为环境和气候指标进行解释时面临许多挑战.我们系统调查了青藏高原地区15个湖泊中51个沉水植物(包括39个
奥陶纪末期深水介壳动物群在湘西北的发现及其古生态意义

首次记述湘西北桃源和慈利县境奥陶系顶部新开岭层产三叶虫武宁尖盾虫(松溪虫)(Mucronaspis(Songxites) wuningensis)和腕足类平月贝-小埃吉尔月贝组合(Paromalomena-Aegiromenella Assemblage),并新建小埃吉尔月贝群集(Aegiromenella Association).群落生态分析表明,这是赫南特期华南深水介壳动物群,栖息在上扬子区东南缘外的湘西北斜坡上,与上扬子区北缘陕南斜坡、渝北凹地(新名)、下扬子区赣皖苏缓坡的同期产物一样,均属于凉深水、低分异度的赫南特贝动物群,宜归于BA4-5(水深约60~150m,最深可达200m)的生态位;与上扬子台地浅水三叶虫M.(S.) mucronata类群和典型赫南特贝动物群(Hirnantia Fauna)有重要差异,后者主要栖息在 BA2-3(水深约5~60m)的生态位.首次绘制出华南赫南特期浅水和深水壳相动物群古地理分布型式.假设湘西北奥陶纪末期沉积速率均等,根据五峰组压实厚度和笔石带绝对年龄值,推算出新开岭层沉积时间只有1.2万年,这或许表明该时期全球重大环境变化在时间上比原先想象的要短很多,尤其是对深水域的影响,明显短于浅水域.
北斗三号系统进展及性能预测——试验验证数据分析

2017年11月5日第一和第二颗北斗三号系统卫星发射升空,开启了中国北斗全球系统组网建设工程.为了验证北斗全球卫星导航系统的信号载荷和设计性能, 2015至2016年间先后发射了五颗北斗三号试验卫星,较全面验证了北斗三号系统的性能.文章侧重描述北斗三号试验系统卫星钟、星间测距、时间同步和卫星定轨性能;详细分析了北斗三号民用信号的信噪比、伪距误差随高度角变化、多路径误差、空间信号综合质量、授时精度等;并与北斗二号系统相关性能进行了比较;最后基于现有试验卫星信号性能,预测了未来北斗全球系统的定位、导航和授时(PNT)性能.
燕山运动与华北克拉通破坏关系的讨论

燕山运动与华北克拉通破坏的关系、华北克拉通破坏与西太平洋板块俯冲作用的关系等是探讨和解决中生代中晚期东亚大陆构造演化过程的关键.燕山运动是具有全球意义的重要地壳构造变动,其形成和演化时间及沉积-火山作用的表现已得到了系统地研究.但关于其全球意义,整体性的表现特征仍有诸多的争议.而争议的焦点在于是否以不整合为基本的出发点.对于一个形成于陆内环境、具有强烈变形但不整合发育并不具有普遍性、且火山活动大量出现的地壳变动,到底是一个构造事件还是一个过程,以及它所代表的区域性或全球地质构造意义,仍有待进一步深思.在简要综述燕山运动及华北克拉通破坏的研究成果基础上,讨论了燕山运动的时空变化、形成机制与华北克拉通的变形、破坏、古太平洋板块的俯冲作用等的相关性.强调指出了燕山运动的发生发展时限是以中晚侏罗世为主,与白垩纪期间的伸展作用、大规模的岩浆活动等为代表的华北克拉通岩石圈减薄是不同动力系统下的产物,或者是不同构造事件或构造过程的产物.另外其形成的大地构造背景及是否能代表华北克拉通破坏的主要过程或某一环节,是本文关注的重要命题之一.
古太平洋板块在欧亚大陆下的俯冲历史:东北亚陆缘中生代-古近纪岩浆记录

系统总结了东北亚陆缘中生代-古近纪火成岩的岩石组合、地球化学特征及其空间变异,讨论了中生代多构造体系影响的时空范围以及古太平洋板块向欧亚大陆下俯冲作用的起始时间及其俯冲历史.东北亚陆缘中生代-古近纪火成岩可划分为九期:早-中三叠世、晚三叠世、早侏罗世、中侏罗世、晚侏罗世、早白垩世早期、早白垩世晚期、晚白垩世和古近纪.东北亚陆缘三叠纪埃达克质岩石、双峰式火山岩、碱性岩、A-型花岗岩和A-型流纹岩的形成主要与古亚洲洋闭合及闭合后的伸展作用有关,而额尔古纳-兴安地块上三叠纪钙碱性火成岩组合揭示了蒙古-鄂霍茨克大洋板块南向俯冲作用的发生.三叠纪期间,东北亚陆缘处于被动陆缘背景;东北亚陆缘早侏罗世钙碱性火成岩具有弧型火成岩的地球化学特征,陆内为双峰式火成岩和A-型花岗岩组合,自陆缘向陆内火成岩成分极性变化与早侏罗世陆缘增生杂岩一起,揭示了古太平洋板块向欧亚大陆下的俯冲作用始于早侏罗世;东北亚陆缘普遍缺少中侏罗世-早白垩世早期(主要为晚侏罗世)岩浆作用,结合早白垩世陆缘增生杂岩低纬度的生物组合与碎屑锆石年龄组合,暗示该阶段东北亚陆缘与古太平洋板块之间主要处于走滑的构造属性;东北亚陆缘广泛分布的早白垩世晚期钙碱性火山岩、I-型花岗岩和埃达克质岩石指示古太平洋板块向东北亚开启大范围低角度俯冲作用;东北亚陆缘晚白垩世-古近纪火成岩分布范围向东明显缩小,并且由陆内向沿海地区迁移,指示欧亚大陆向东漂移和古太平洋俯冲板块逐渐回撤的构造过程.
老年慢性鼻窦炎患者手术前后多导睡眠监测结果分析

临床上,老年鼻窦炎患者往往有明显的主观慢性鼻塞症状,并且客观鼻阻力也较健康人群升高,导致该人群中阻塞性睡眠呼吸暂停低通气综合征(obstructive sleep apnea hyponea syndrome, OSAHS)患病率较高,具有较高的潜在危险性。改善鼻通气是治疗OSHAS的重要步骤和方法。鉴于多导睡眠监测(polysomnography,PSG)是诊断 OSAHS的金标准,本研究对2013年1月至2017年6月期间在绍兴市第五医院接受手术治疗的58例慢性鼻窦炎老年患者进行了PSG监测,现将结果分析报告如下。
Organochlorine pesticides in soils from the Issyk-Kul region in the western Tian Shan Mountains,Kyrgyzstan:Implication for spatial distribution,source apportionment and ecological risk assessment

As organchlorine pesticides (OCPs) may be an ecologic threat to mountain environments due to their tendency to deposit and accumulate in mountain regions undergoing long-range air transport,OCPs were analyzed in soils collected from an intermontane basin of the western Tian Shan Mountains,which is the UNESCO protected natural reserve of Issyk-Kul.Total OCP concentrations in the Issyk-Kul region ranged from 4.63 to 414 ng/g dw,of which two extraordinary high OCP concentrations (414 ng/g dw and 213 ng/g dw,respectively) influenced by an abandoned dumping site and urban sewage,respectively,were found.Principal component analysis (PCA) and correlation analysis inferred that the OCP inputs in the east of the Issyk-Kul region were mainly from local endogenous sources,and exogenous input via LRAT processes were prominent in the west and south.Additionally,the isomeric and parent substance/metabolite ratios revealed most pesticides accumulated in this region were from old usage,while DDTs had fresh input because of possibly illegal regional application and a slow degradation from the dumping site.Furthermore,ecological risk assessment revealed that no frequently adverse ecological effects were observed in the Issyk-Kul region,but potential risks on neighbouring organisms induced by p,p'-DDT and γ-HCH in dumping site and urban sewage should be considered when devising an efficient management plan to prevent secondary pollution.
Earthquake-triggered landslides affecting a UNESCO Natural Site:the 2017 Jiuzhaigou Earthquake in the World National Park,China

On August 8th,2017,an Ms 7.0 magnitude earthquake occurred in Jiuzhaigou County,northern Sichuan Province,China.The Jiuzhaigou Valley World National Park was the most affected area due to the epicentre being located in the scenic area of the park.Understanding the distribution characteristics of landslides triggered by earthquakes to help protect the natural heritage sites in Jiuzhaigou Valley remains a scientific challenge.In this study,a relatively complete inventory of the coseismic landslides triggered by the earthquake was compiled through the interpretation of high-resolution images combined with a field investigation.The results indicate that coseismic landslides not only are concentrated in Rize Gulley,Danzu Gully and Zezhawa Gully in the study area but also occur in the front part of Shuzheng Gully along the road network (from the entrance of Jiuzhaigou Valley to Heye Village).The landslides predominantly occur on the east-and southeast-facing slopes in the study area,which is a result of the integrated action of the valley direction and fault movement direction.The back-slope effect and the slope structure caused the difference in coseismic landslide distribution within the three gullies (Danzu Gully,Rize Gully,and Zezhawa Gully) near the inferred fault.In addition,the topographic position index was used to analyse the impact of micro-landforms on earthquake-triggered landslides by considering the effect of the slope angle.The study results reveal a higher concentration of landslides in the slope position class of the middle slope (30°-50°) in Jiuzhaigou Valley.These findings can provide scientific guidance for the protection of natural heritage sites and post-disaster reconstruction in Jiuzhaigou Valley.
Avalanche activity and characteristics of its triggering factors in the western Tianshan Mountains,China

Snow avalanche is a serious threat to the safety of roads in alpine mountains.In the western Tianshan Mountains,large scale avalanches occur every year and affect road safety.There is an urgent need to identify the characteristics of triggering factors for avalanche activity in this region to improve road safety and the management of natural hazards.Based on the observation of avalanche activity along the national road G218 in the western Tianshan Mountains,avalanche event data in combination with meteorological,snowpack and earthquake data were collected and analyzed.The snow climate of the mountain range was examined using a recently developed snow climate classification scheme,and triggering conditions of snow avalanche in different snow climate regions were compared.The results show that snowfall is the most common triggering factor for a natural avalanche and there is high probability of avalanche release with snowfall exceeding 20.4 mm during a snowfall period.Consecutive rise in temperature within three days and daily mean temperature reaching 0.5℃ in the following day imply a high probability of temperature-rise-triggered avalanche release.Earthquakes have a significant impact on the formation of large size avalanches in the area.For the period 2011-2017,five cases were identified as a consequence of earthquake with magnitudes of 3.3≤M_L≤5.1 and source-to-site distances of 19~139 km.The Tianshan Mountains are characterized by a continental snow climate with lower snow density,lower snow shear strength and high proportion depth hoar,which explains that both the snowfall and temperature for triggering avalanche release in the continental snow climate of the Tianshan Mountains are lower than that in maritime snow climate and transitional snow climate regions.The findings help forecast avalanche release for mitigating avalanche disaster and assessing the risk of avalanche disaster.