mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Stability of Pyrotechnic Composition in Flame Detonator Exposed to Severe Thermal Stimulus

The stability of pyrotechnic composition used in flame detonator was studied at severe temperatures(–70―130 °C) for 5 d. For single N-LTNR(normal lead styphnate), camera was used to observe the shape and colour of N-LTNR in the DSC(differential scanning calorimetry) furnace during continuous heating and cooling processes. Based on the DSC-TGA(thermogravimetric analysis) results, it can be seen that when the temperature exceeded 110 °C, N-LTNR lost its crystal water, making the energetic material become darker in colour, smaller in dimension, lager in volume and lighter in weight(3.416%); when the temperature was below –40 °C, the phenomenon of sample broking, jumping and cracking happened. For the N-LTNR and Pb(N_3)_2(lead azide) double layers, the loss of N-LTNR’s crystal water at the temperature higher than 110 °C caused the hydrolysis reaction of Pb(N_3)_2, and the purity of Pb(N_3)_2 measured after the temperature cycling decreased from 98.6% to 95.26%. For the flame detonator, the height and diameter of the flame detonator were measured and no apparent changes of them were found. The p-t(pressure-time) test shows that the peak pressure was decreased by 3.9%. Therefore, the operating temperature of this flame detonator should be limited to –40―110 °C.
Synthesis and Electrochemical Properties of Highly Crystallized CuV_2O_6 Nanowires

CuV_2O_6 nanowires were prepared via a simple hydrothermal route using NH_4VO_3 and Cu(NO_3)_2 as starting materials. The structures and electrochemical properties of CuV_2O_6 nanowires were characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that the CuV_2O_6 nanowires are about 100 nm in width and single crystalline grown along [001] direction. CuV_2O_6 nanowires delivered a high initial discharge capacity of 435 and 351 mA·h/g at current densities of 50 and 100 mA·h/g, respectively. The electrochemical kinetics of the CuV_2O_6 nanowires was also investigated by means of electrochemical impedance spectroscopy(EIS) and the poor rate performance was observed, which may be attributed to the low ion diffusion coefficient of the CuV_2O_6 nanowires.
Negative Magnetism in Perovskite Manganites Gd_(1-x)Sr_xMnO_3(0.1≤x≤0.3)

A series of Sr-substituted Gd_(1-x)Sr_xMnO_3(0.1≤x≤0.3) materials was prepared via a standard method involving solid-state reaction. Their crystal structure within the entire doping region was determined to be orthorhombic perovskite type. The magnetic properties of the perovskite Gd_(1-x)Sr_xMnO_3(0.1≤x≤0.3) were thoroughly investigated. It appears that Mn ions with high valence state can induce stronger magnetization, and negative magnetization is evident in the manganites with x=0.1 and x=0.2, suggesting that valence fluctuation plays an important role in such systems. The result of XPS analysis indicates that the valence state of Mn ions is 3.25 and there seems to be excess amounts of oxygen in the structure of Gd_(0.8)Sr_(0.2)MnO_(3+δ). In addition, the results of magnetization measurements demonstrate that spin reversal occurs only when the applied field is less than 1.99×10~5 A/m, which presumably could be due to the negative exchange interaction between Mn sub-lattice and Gd sites.
两系杂交早稻苗头组合海南早春大棚增温制种技术研究

以276S/R1019为材料,在两用不育系育性敏感期采用塑料棚增温处理,促使两用不育系育性转换,探索两系杂交早稻苗头组合海南早春少量制种可行性。结果表明:在海南三亚腾桥2月中下旬,棚区内日平均温度增至23.0 ~ 26.5℃,比同期自然温度提高3.5 ~ 4.1℃,达到了温敏不育系276S表达完全不育的温度条件; 经育性敏感期26 d增温处理,镜检花粉不育度为99.1%~100%,套袋自交结实率为0.044 %,异交结实率为26.4%,可以实现两系杂交早稻苗头组合海南早春少量制种。
血液专科护理质量监测指标制定及应用效果

目的建立血液专科护理质量监测指标,提高专科护理质量。方法制订血液专科化疗患者口腔黏膜炎发生率、疼痛干预率、 PICC/CVC意外脱管率、PICC/CVC相关性感染发生率、化疗外渗发生率、腹泻(肠道GVHD)患者肛周皮肤损伤发生率、护理相关性医源性皮肤损伤(皮肤GVHD)发生率等7项专科护理质量监测指标,明确指标的关键内容和科学测量方法,回顾性分析2013年临床评价指标监测结果,观察2014年临床评价指标监测结果变化,指导临床专科护理工作。结果前后2年的指标比较, PICC/CVC相关性感染发生率、化疗外渗发生率、化疗患者口腔黏膜炎发生率下降,患者平均住院日缩短。结论建立血液专科护理质量监测指标,对护理质量管理具有导向作用,能有目的有针对性地促进护理质量的持续改进。
Spindle LiFePO_4 particles as cathode of lithium-ion batteries synthesized by solvothermal method with glucose as auxiliary reductant

The well-distribution spindle LiFePO_4 (LFP) nanoparticles as cathode of lithium secondary batteries were synthesized by a solvothermal reaction route at low temperature (180 ℃) in which the ascorbic acid was used as reducing agent. In order to guarantee that the pH values of thermal systems were not affected too much and the reducibility of the system was enhanced at the same time, glucose was chosen as an auxiliary reductant in this reaction. The obtained powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and laser particle analyzer. The results show that the carbon-coated uniform spindle olivine LiFePO_4/C-glucose particles (glucose as auxiliary reductant, LFP/C-G) are prepared with the size 500–600 nm and without any impurity phases. Their electrochemical properties were evaluated by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge tests. LFP/C-G has a higher conductivity and better reversible capability than carbon-coated LFP (LFP/C). The highest discharge capacity of LFP/C-G is 161.3 mAh·g-1 at 0.1C and 108.6 mAh·g-1 at 5.0C, respectively. The results imply that the neat crystal nanostructure of LFP/C-G has excellent capacity retention and cycling stability. The adding of glucose is the key factor for the welldistribution and neat crystal structure of nanoparticles, thus the electrochemical performances of materials are improved.
Microwave-assisted synthesis of L-cysteine-capped nickel nanoparticles for catalytic reduction of 4-nitrophenol

A simple and efficient microwave-assisted procedure for synthesis of L-cysteine-capped nickel nanoparticles (cyst-Ni NPs) in ethylene glycol solvent was demonstrated. The as-synthesised NPs were characterised by ultraviolet–visible (UV–Vis) spectrophotometer, Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffractometry(XRD). The cyst-Ni NPs are proved to be excellent heterogeneous catalysts for the 100 % reduction of 4-nitrophenol(4-NPh) in the presence of reductant (NaBH4) within reaction time of 40 s. In contrast, Raney nickel in similar sample environments shows only 25.5 % reduction. The kinetic and energetic behaviours of cyst-Ni NPs were also studied, and the reduction reaction is determined to follow pseudo-first-order kinetics with a rate constant value of 0.115 s~(-1) and activation energy of 36.1 kJ·mol~(-1). In addition to its high catalytic competence, cyst-Ni NPs catalyst exhibits excellent recyclability with negligible catalytic poisoning.
全球大震和中国及邻区中强震地震活动(2015年5—6月)

本目录中的地震参数来自"中国地震台站观测报告"(简称"月报").其中,国内及邻区给出M≥4.7的事件,全球给出M≥6.0的事件."月报"由中国地震台网中心按月做出.
Seismicity and Seismotectonics of Jeddah-Makkah Region, West-Central Saudi Arabia

Jeddah-Makkah regionis have been suffering from earthquake crisis where some moderate to destructive earthquakes have been recorded. These earthquake activities are oriented along major faults or clustered in certain spots. Moreover, these earthquake events have annual recurrence periods, so the identification of these seismogenic source zones is of utmost importance for mapping the most hazardous localities which should be avoided in the future urban planning. Historical and instrumental earthquakes have been collected from national and international data centers and unified in catalogue. The existence of microearthquakes inland suggests that there is a significant level of tectonic activity at away from the axial trough of the Red Sea. Then, seismogenic source zones have been defined depending on the major tectonic trends; distribution of earthquake epicenters, seismicity rate (a & b- values) and fault plane solution of major earthquakes. It is concluded that Jeddah-Makkah region is affected by the outlined five seismogenic source zones; three of these zones aligned of the main Red Sea axial trough (southwestern Jeddah, western Jeddah, and northwestern Jeddah zones), while the other two zones are located in the land area of the region (Thewal-Rabegh and Jeddah-Makkah zones). These inland zones correlated well with the main trends of major tectonics which refleet the reactivation of tectonic movements along these fault trends. The Red Sea zones are in agreement with the main path of the axial trough. The range of b-value in these identified zones is 0.65 to 1.03 through these identified zones. The area characterized by higher b-values could be indicative of a relative low stress regime which was a result of resulting from the stress release by the earthquakes. Whereas, the areas of lower b-values can be considered as an evidence of a relatively higher stress regime associated with a dominantly extensional stresses. Based on aforementioned, the region is suffering from different stress level accumulations which, in turn, cause earthquakes with different magnitudes. Accordingly, deployment of local seismograph network through Jeddah-Makkah region is highly recommended. These results will support, to a great extent, seismic hazard assessment and risk mitigation of the region.
GIS-Based Analysis of Relative Tectonic Activity along the Kazerun Fault Zone, Zagros Mountains, Iran: Insights from Data Mining of Geomorphic Data

This paper tests a data mining method for evaluation of the “IRTA” (Index of Relative Tectonic Activity) to investigate the impact of active tectonics on geomorphic processes and landscape development. Based upon K-means clustering of six basin-related geomorphic indices (the hypsometric integral, basin asymmetric factor, drainage density, basin shape ratio, mean axial slope of the channel and topographic roughness) that represent the relative strength of active tectonic deformation on topography and morphology, the relative tectonic activity along the Kazerun Fault Zone in the Zagros Mountains of Iran may be classified into low, moderate and high relative tectonic activity zones. The results allow the identification of the clusters of similarly deformed areas related to relative tectonic activity. The utilization of geomorphic parameters as well as IRTA with comparison to the field observations exhibit change in relative tectonic activities mostly corresponding to the change in mechanism of the prominent fault zones in the study area.
An Object-Oriented Diagnostic Model for the Quantification of Porewater Geochemistry in Marine Sediments

The reaction-transport model is widely used to identify and quantify dissolved chemical species in sediment porewaters. In this paper, a modularized code framework of diagenetic model was proposed as a diagnostic tool to fit the porewater profiles in marine sediments. Based on the conservation principle of the finite volume method, we combined the discretized diagenetic equations with various geochemical reactions, including but not limited to methanogenesis, sulfate reduction, etc.. The code was organized in object-oriented FORTRAN and verified with literature parameters, which proved its robustness and effectiveness. Finally, three different sites (IODP Expedition 311 Site U1327, UBGH2-1_1, ODP Leg204 Site 1245) are exemplified as case studies.
Cr~(2+):ZnS Saturable Absorber Passively Q-Switched Ho:LuVO_4 Laser

We report a cw Tm:YAP laser resonantly pumped Ho:LuVO_4 laser in passively Q-switched (PQS) mode with Cr~(2+):ZnS as a saturable absorber (SA). The influence of different transmittances of the output coupler on laser output performance is analyzed. With T = 50%, the maximum PQS average output power of 2.3W is obtained, corresponding to the slope efficiency and the optical-optical conversion efficiency are 35.1% and 19.8%, respectively. Also, the minimum pulse width of 100 ns is achieved at the maximum pulse repetition frequency of 34.2 kHz. When the maximum cw output power is 2.7 W, the beam quality factor of the horizontal direction M_x~2 = 1.04 and the vertical direction M_y~2 = 1.10 are obtained. In addition, the central wavelength of the laser output remains to be 2057.5nm with the output coupler transmittances of 50% and 60% in both cw and PQS operations. The results show that the Cr~(2+):ZnS can be used as an SA in a Ho:LuVO_4 laser around 2-μm wavelength.
External-Strain-Induced Raman Scattering Modification in g-C_3N_4 Structures

Regulation of optical properties and electronic structure of graphitic carbon nitride (g-C_3N_4) via external strain has attracted much attention due to its potential in photocatalyst and electronic devices. However, the identification of g-C_3N_4 structure transformation induced by strain is greatly lacking. In this work, the Raman spectra of g-C_3N_4 with external strain are determined theoretically based on the density function theory. Deformation induced by external strain not only regulates the Raman mode positions but also leads to a Raman mode splitting, which can be ascribed to crystal symmetry destruction by strain engineering. Our results suggest the use of Raman scattering in structural identification in deformed g-C_3N_4 structure.
Identification of Y (4008), Y (4140), Y (4260), and Y (4360) as Tetraquark States

Within the framework of a color flux-tube model with a four-body confinement potential, the tetraquark states [cq][cq] (q = u or d) with IJ~(PC) = 01~(––) are systematically investigated. The numerical results indicate that states Y (4008), Y (4140), Y (4260), and Y (4360) can be uniformly described as tetraquark states [cq][cq] with n~(2S+1) L_J of 1~1P_1, 1~5P_1, 2~5P_1 and 1~5F_1, respectively, in the color flux-tube model. They are compact threedimensional spatial configurations similar to a rugby ball, higher orbital angular momentum L, more prolate. The four-body confinement interaction based on a color flux-tube picture should be responsible for the formation of those compact tetraquark states.
La对Sn-0.3Ag-0.7Cu回流焊点纳米力学性能影响

随着电子产业的不断发展,对微连接焊点可靠性的要求越来越高. 文中在Sn-0.3Ag-0.7Cu的基础上添加第四种微量元素La,并制备出多种不同铼含量的焊球,通过回流焊得到Sn-0.3Ag-0.7Cu-xLa焊点. 采用纳米压痕仪对焊点进行一次加载—卸载试验,对试验所得到的载荷—位移数据通过采用Ma物理反解析法可得出焊点的纳米压痕硬度H、弹性模量E及蠕变速率敏感指数m等焊点的性能参数. 研究稀土元素La对焊点纳米力学性能的影响. 结果表明,随着微量稀土元素La含量的增加,焊点的硬度、弹性模量表现出明显的增长趋势,而且抗蠕变性能随着铼含量的上升呈线性上升趋势.
Genetic diversity and DNA fingerprinting in jute (Corchorus spp.) based on SSR markers

Genetic diversity analysis and DNA finger printing are very useful in breeding programs, seed conservation and management. Jute (Corchorus spp.) is the second most important natural fiber crop after cotton. DNA fingerprinting studies in jute using SSR markers are limited. In this study, 58 jute accessions, including two control varieties (Huangma 179 and Kuanyechangguo) from the official variety registry in China were evaluated with 28 pairs of SSR primers. A total of 184 polymorphic loci were identified. Each primer detected 3 to 15 polymorphic loci, with an average of 6.6. The 58 jute accessions were DNA-fingerprinted with 67 SSR markers from the 28 primer pairs. These markers differentiated the 58 jute accessions from one another, with CoSSR305-120 and CoSSR174-195 differentiating Huangma 179 and Kuanyechangguo, respectively. NTSYS-pc2.10 software was used to analyze the genetic diversity in the 58 jute accessions. Their genetic similarity coefficients ranged from 0.520 to 0.910 with an average of 0.749, indicating relatively great genetic diversity among them. The 58 jute accessions were divided into four groups with the coefficient 0.710 used as a value for classification, consistent with their species and pedigrees. All these results may be useful both for protection of intellectual property rights of jute accessions and for jute improvement.
Development of underground mine monitoring and communication system integrated ZigBee and GIS

An automated underground mine monitoring and communication system based on the integration of new technologies is introduced to promote safety and health, operational management and cost-effectiveness. The proposed system integration considering Wireless Sensor Network (WSN) assisted Geographic Information System (GIS) enables to monitor and control underground mining applications from surface office. Based on the capabilities of WSNs, ZigBee network is adapted for near real-time monitoring, ventilation system control and emergency communication in underground mine. ZigBee nodes were developed to sense environmental attributes such as temperature, humidity and gases concentration; switching ON and OFF ventilation fans; and texting emergency messages. A trigger action plan for monitored attributes above normal and threshold value limits is programmed in the surface GIS management server. It is designed to turn the auxiliary fans on remotely or automatically in orange condition and sending evacuation messages for underground miners in unsafe (red) condition. Multi-users operation and 3D visualisations are other successful achievements of the proposed system for the underground monitoring and communication.
Genetic diversity and association mapping for salinity tolerance in Bangladeshi rice landraces

Breeding for salinity tolerance using Bangladeshi rice landraces and understand genetic diversity has been limited by the complex and polygenic nature of salt tolerance in rice genotypes. A genetic diversity and association mapping analysis was conducted using 96 germplasm accessions with variable response to salt stress at the seedling stage. These included 86 landraces and 10 indica varieties and lines includingNona Bokra, fromsouthern Bangladesh.A total of 220 alleles were detected at 58 Simple Sequence Repeat (SSR) marker loci randomly distributed on all 12 rice chromosomes and 8 Sequence Tagged Site (STS) markers developed for genes SKC1, DST, and SalT. The average gene diversity was 0.5075 and polymorphism information content value was 0.4426, respectively. Cluster analysis revealed that 68 and 21 accessions were clustered into 2 distinct groups, possibly corresponding to indica and japonica groups, respectively and the remaining 7 landraces were classified as an admixed group. In addition to Wn11463, the STS marker for SKC1, RM22418 on Chr. 8 was significantly associated with salinity tolerance, at the location of a QTL detected in previous studies. Our findings of favorable alleles associated with salinity tolerance in Bangladeshi rice landraces, as well as the development of STS markers for salt tolerance genes, will be helpful in future efforts to breed salinity tolerance in rice.
Application of deep borehole blasting on fully mechanized hard top-coal pre-splitting and gas extraction in the special thick seam

In order to solve the problems of top-coal inadequate destruction and large amounts of gas emission in mining extra thick and hard coal seam, this study investigated the pre-splitting for deep borehole blasting and gas pre-draining technologies on top coal. The mechanism of the technologies was systematically expounded based on hard top-coal cracks development obtained by numerical simulation and theoretical analysis. The results show that explosive blasting in the hard rock results in a large number of cracks and large displacement in the rock mass due to the effect of explosion stress. Meanwhile, the thick top-coal caves, and desorbing gas flows along the cracks improve gas extraction. Finally, the pre-splitting for deep borehole blasting and gas pre-draining technologies was applied in No. 3802 working face of Shui Liandong Coal Mine, which increases monthly output in the face to 67.34 kt and the drained gas concentration to 86.2%. The drained gas average concentration from each borehole reaches 40%, and the effect is remarkable.
A holistic examination of the load rating design of longwall shields after more than half a century of mechanised longwall mining

It is a commonly asked question:how big should the longwall shields be? The answer is a key aspect of a longwall mining feasibility study when the consequences of inadequately rated shields are considered. This paper addresses this question based on the measured nature of the loading environment in which shields are required to operate, the various geological and geometrical controls of that environment and the various links between their load rating, a range of other relevant shield design factors and the loss event they are required to prevent a major roof collapse on the longwall face. The paper concludes that despite the tremendous advances that have been made in shield design and load rating over the past 50 years, the same drivers that caused longwall miners of the past to seek improved roof control on the longwall face via the use of ever-higher rated shields, are still as relevant today. However at the current time, the limits of the largest available longwall shields have yet to be tested, therefore industry focus for the foreseeable future should possibly be in achieving the maximum level of roof control on the face via their optimum operational use rather than considering further shield rating increases and incurring the inevitable downsides in terms of capital cost and shield weight.
Roadway layout for recycling residual coal pillar in room-and-pillar mining of thick coal seam

In the context of a room-and-pillar mining gob in Shanxi province in China, this paper numerically investigates the stress distribution and deformation rules of roadway surrounding rocks at various locations of residual coal pillars in room-and-pillar mining gobs using software FLAC3D. It is found that the concentrated stress beneath coal pillars distributes in a shape of ellipse. A reasonable roadway layout is then proposed. In this design, it is indicated that roadways should be designed to avoid the supporting zones of pillars with increasing compression and take into account the roof falling and crushing in the upper gob. According to the surrounding rock deformation characteristics and mining roadway locations as well as the supporting principles of timely support, rock reinforcing, piecewise management and suiting local conditions, a new asymmetric shield supporting plan is proposed. The field surveying results show that this supporting plan can effectively control the roadway rock deformation, thus guarantee the safe and smooth construction of roadways.
Optimization of the fully grouted rock bolts for load transfer enhancement

The purpose of this study is to investigate the role of bolt profile configuration in load transfer capacity between the bolt and grout. Therefore, five types of rock bolts are used with different profiles. The rock bolts are modeled by ANSYS software. Models show that profile rock bolt T_3 and T_4 with load capacity 180 and 195 kN in the jointed rocks, are the optimum profiles. Finally, the performances of the selected profiles are examined in Tabas Coal Mine by FLAC software. There is good subscription between the results of numerical modeling and instrumentation reading such as tells tale, sonic extensometer and strain gauge rock bolt. According to the finding of this study, the proposed pattern of rock bolts, on 7 + 6 patterns per meter with 2 flexi bolt (4 m) for support gate road.