mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Arc characteristics during the instability stage on transverse magnetic field contacts

The arcing process greatly affects the breaking ability after current zero.The instability stage is the transition stage from the ignition to the movement stage,which affects the arc movement characteristics.In this paper,the arc characteristics during the instability stage on spiral-type contacts were investigated using a high-speed video camera.A multi-column parallel instability mode and a single-column instability mode were found during the instability stage.The arc appearance and constriction degree changed rapidly.The arc voltage usually increased accompanied by fluctuations.In addition,it was found that the current significantly influenced the arc mode and duration in the instability stage.With increased peak current,the probability of a single-column instability mode increased,and the fluctuation range and average time decreased.
Effects of nitrogen on ozone synthesis in packed-bed dielectric barrier discharge

The effects of nitrogen on ozone synthesis are studied in a coaxial cylinder generator with dielectric barrier discharge (DBD) and pack-bed dielectric barrier discharge (PB-DBD).A series of 10 h discharge experiments are conducted adopting a bare stainless electrode and bare copper electrode.Results show that the material of the electrode can affect the ozone synthesis.It is inferred that the ozone zero phenomenon (OZP) may be induced from ozone decomposing by metallic oxide catalysis.Packing dielectric particles can reduce the OZP.Adding a certain amount of nitrogen into the oxygen feed gas can further eliminate the OZP,and increase the ozone concentration significantly,but decreases the maximum energy efficiency of ozone generators.Initial analysis indicates that the optimal proportion of nitrogen addition is inversely related to the average reduced electric field strength in the discharge region.
Spontaneous current relaxation in NBI heated plasmas on EAST

We report on current profile evolution in EAST NBI driven plasmas where two neutral beams are injected,one during the current ramp phase and the second during flattop.At the end of the current ramp phase,it is found that a flat q profile with q_0~1 is achieved with low magnetic shear in the core.It is observed that plasma current and density both relax much faster than resistive time,even in the absence of sawtooth activity when H-L transition occurs.Density fluctuations associated with magnetic perturbations (3/2) as a precursor to the H-L transition are observed.It is likely that these modes play a role in fast current transport.
Non-microsurgical skin flaps for reconstruction of difficult wounds in distal leg and foot

Purpose: To express the versatility of a variety of non-microsurgical skin flaps used for coverage of difficult wounds in the lower third of the leg and the foot over 4 years period. Five kinds of flaps were used. Each flap was presented with detailed information regarding indication, blood supply, skin territory and technique. Methods: Altogether 26 patients underwent lower leg reconstruction were included in this study. The reconstructive procedures applied five flaps, respectively distally based posterior tibial artery perforator flap (n ¼ 8), distally based peroneal artery perforator flap (n ¼ 4), distally based sural flap (n ¼ 6), medial planter artery flap (n ¼ 2) and cross leg flaps (n ¼ 6). Results: In all cases, there were no signs of osteomyelitis of underlying bones or discharge from the undersurface of the flaps. Fat necrosis occurred at the distal end of posterior tibial artery perforator flap in one female patient. The two cases of medial planter artery flap showed excellent healing with closure of donor site primarily. One cross leg flap had distal necrosis. Conclusion: Would at lower third of leg can be efficiently covered by posterior tibial, peroneal artery and sural flaps. Heel can be best covered by nearby tissues such as medial planter flap. In presence of vascular compromise of the affected limb or exposure of dorsum of foot, cross leg flap can be used.
油茶籽制油技术实践

介绍冷榨和热榨制取油茶籽油和精炼油茶籽油技术。根据国内榨油机的榨膛压力和材质质量,冷榨入榨温度采取50 ~ 55℃,热榨温度110 ~ 115℃。针对油茶籽富含淀粉、茶皂素和微量苯并(a)芘在制油和精炼方面要特殊设计工艺和设备结构,如热榨工艺中,提出入浸油茶籽饼的水分控制在7%左右,并对浸出器、蒸脱机的结构提出特殊要求,对蒸发的混合油浓度提出要求。提出在精炼中如何防止乳化和降低苯并(a)芘和反式酸,以生产合格的冷榨油、热榨油和一级精炼油。
子宫渔网状修复重建术在凶险型前置胎盘伴胎盘植入患者剖宫产术中的应用效果观察

目的:观察子宫渔网状修复重建术在凶险型前置胎盘伴胎盘植入患者剖宫产术中的应用效果。方法:收集2015年12月1日至2017年12月31日85例因凶险型前置胎盘在我院行剖宫产术,发现胎盘植入且子宫下段肌壁部分缺损行子宫渔网状修复重建术患者的临床资料,观察患者临床情况及疗效。结果: 85例患者术中出血量600 ~ 3000(1387.06±614.85) ml,输血量(红细胞悬液+自体血) 0~2450(864.98±503.77) ml。经渔网状修复重建子宫后,行子宫动脉栓塞术8例,产褥感染11例,切除子宫1例,子宫保留率98.82%。结论:渔网状修复重建术在凶险型前置胎盘伴胎盘植入患者剖宫产术中应用安全可行,保留子宫率高,术中、术后并发症少。
脑干小脑卒中后肥大性下橄榄核变性5例临床特点

目的探讨肥大性下橄榄核变性(hypertrophic olivary degeneration,HOD)的病因、临床表现及影像学特点。方法回顾性分析2015年至今我院诊断为HOD的5例患者,对其相关资料进行整理分析。结果5例患者存在齿状核-红核-下橄榄核环路受累病史,其中中脑1例,脑桥2例,小脑2例,包括梗死2例,出血3例。除原发脑血管病的后遗症状外,5例患者分别于1~8个月出现新的临床表现:软腭震颤(symptomatic palatal tremor,SPT)(2例),眼震(2例),复视(2例),头部(2例)、下颌(1例)、四肢(1例)或腹部(1例)阵挛,共济失调(1例)。头MRI示同侧、对侧或双侧下橄榄核T2WI呈高信号,其中伴下橄榄核体积增大4例。结论齿状核-红核-下橄榄核环路受累可以继发HOD,从而出现SPT等临床表现,头MRI表现为下橄榄核T2WI高信号伴或不伴体积增大,是特征性的影像学表现。
含钙化的肝脏血管周上皮样细胞瘤一例

本例为中年女性患者,肿块周边有点状钙化,实属少见,增强后呈动脉期明显强化,并且无肝硬化基础,除白细胞计数轻度减低外,其他相关实验室检查均正常,符合肝脏PEComa的表现,并最终经病理和免疫组织化学证实。目前多数学者认为此病多属于良性,极少发生恶性倾向。手术切除是治疗的有效方法,术后需要常规定期随访。
Synthesis of Fe_3O_4@SiO_2-Au/Cu magnetic nanoparticles and its efficient catalytic performance for the Ullmann coupling reaction of bromamine acid

Novel magnetic core/shell bimetallic Au/Cu nanoparticles (Fe_3O_4@SiO_2-Au/Cu NPs) were prepared using SiO_2-coated iron oxide (Fe_3O_4@SiO_2) as a supported material. The magnetic Fe_3O_4 colloidal nanocrystal clusters (CNCs) as nano-core were modified with a silica coating for improvement stability and superficial area of the Au-Cu particles. The morphological structure and chemical composition of the Fe_3O_4@SiO_2-Au/Cu NPs were characterized with high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) analyses. The Au and Cu NPs were deposited on the SiO_2 surface in a highly dense and well dispersed manner with an average size of approximately 5 nm. The Fe_3O_4@SiO_2-Au/Cu NPs as magnetic nano-catalysts were applied to the Ullmann coupling reaction of bromamine acid to synthesize 4,40-diamino-1,10-dianthraquinonyl-3,30- disulfonic acid (DAS). The prepared Fe_3O_4@SiO_2-Au/Cu NPs exhibited efficient catalytic activity with higher conversion and selectivity.A bromamine acid conversion of 97.35% and selectivity for DAS of 88.67% were obtained in aqueous medium.The magnetic nano-catalysts can be readily separated from the reaction system and reused.This new nano-catalytic reaction represents a useful and attractive cleaner production system.The new catalyst system has important and potential applications in dye and pigment industry.
Light scattering based analyses of the effects of bovine serum proteins on interactions of magnetite spherical particles with cells

Information concerns endocytosis and autophagic effects of magnetite particles is crucial for understanding the particle-cell interactions. In this work, we investigated the effects of bovine serum proteins on the endocytosis of magnetite spherical particles (MSPs). Autophagic effects of MSPs in breast cancer cellswere studied. Light scattering based flowcytometry and microscopy were used for evaluating the uptake potential of MSPs by cells and the cellular autophagosome accumulation. Results showed bovine serum proteins significantly reduced the endocytosis of MSPs by decreasing their adsorption to cell membranes. Additionally, serum proteins had influences on the endocytic mechanisms of MSPs. Autophagosome accumulation could be caused by the internalized MSPs rather than the particles associated with cell membrane. Above fundamental findings promote our understandings upon the interactions of MSPs with cells. Light scattering based methods were proved to be simple and effective. The present work may promote their application in studies upon endocytosis of metallic particles in the future.
Dynamic Performance Analysis of the Tuned Heave Plate System for Semi-Submersible Platform

Logistical supply is costly for the deepwater oil and gas exploitation, thereby it is necessary to develop a novel power supply solution to improve the offshore structure's self-holding capacity. The two-body point absorbers, as a renewable energy device, have achieved a rapid development. Heave plate is used to constrain the truss's motion in the two-body point absorber, and the floater moves along the truss up and down. This two-body point absorber can be considered to be an essentially mass-spring-damper system. And it is well known that the heave plates have been widely used in the Spar platform to suppress the heave motions. So if the two-body point absorber can be modified to combine with offshore floating structures, this system can not only offer electric power to support operations or daily lives for the platform, but also control the large motions in the vertical plane. Following this concept, a novel tuned heave plate (THP) system is proposed for the conventional semi-submersible platform. In order to investigate the dynamic performances of the single THP, two experiments are conducted in this paper. First, the hydrodynamic coefficients of the heave plates are studied, and then the THP experiments are carried out to analyze its dynamic performance. It can be concluded that this THP is feasible and achieves the design objective.
Synthesis, Characterization and Luminescent Properties of Two Copper(I) Complexes Based on 2,2'-Biquinoline and Phosphorous Ligand

Three new copper(I) complexes, namely [Cu(DPEphos)(Biq)]CF_3SO_3 (1) and [Cu(PPh_3)_2(Biq)]CF_3SO_3 (2) and [Cu(PPh_3)_2(Biq)]ClO_4 (3) (DPEphos = bis[2-(diphenylphosp hino)phenyl]ether, PPh_3 = triphenylphosphine and Biq = 2,2'-biquinoline), are synthesized and characterized by IR, ~1H NMR, ~(31)P NMR, fluorescence spectra and terahertz time-domain spectroscopy (THz-TDS). Complex 1 crystallizes in triclinic, space group P1 with a = 12.6997(5), b = 13.2813(5), c = 15.3593(6) A, α = 80.211(3)°, β = 88.752(3)°, γ = 70.113(3)°, V = 2398.85(15) A~3, C_(55)H_(41.2)CuF_3N_2O_(4.6)P_2S, M_r = 1018.27, Z = 2, D_c = 1.410 g/cm~3, F(000) = 1048, μ = 0.628 mm-1, the final R = 0.0450 and wR = 0.1105 for 9419 observed reflections (I > 2σ(I)). Complex 2 crystallizes in monoclinic, space group C2/c with a = 19.9961(7), b = 15.9774(5), c = 17.7908(6) A, β = 119.758(4)°, V = 4982.8(3) A~3, C_(56.47)H_(47.88)CuF_3N_2O_(4.47)P_2S, M_r = 1040.54, Z = 4, D_c = 1.387 g/cm~3, F(000) = 2154, μ = 0.606 mm-1, the final R = 0.0430 and wR = 0.1218 for 4897 observed reflections (I > 2σ(I)). Complex 3 crystallizes in monoclinic, space group C2/c with a = 19.7534(8), b = 15.0797(5), c = 17.8097(7) A, β = 116.400(5)°, V = 4751.8(3) A~3, C_(56)H_(45)ClCuN_3O_4P_2, M_r = 984.88, Z = 4, D_c = 1.377 g/cm~3, F(000) = 2040, μ = 0.635 mm-1, the final R = 0.0731 and wR = 0.2180 for 4670 observed reflections (I > 2σ(I)). In the emission spectra, shifts of emission peak are derived from ligand-centered (π-π*) transition.
Relationship between electrogenic performance and physiological change of four wetland plants in constructed wetland-microbial fuel cells during non-growing seasons

To find suitable wetland plants for constructed wetland-microbial fuel cells (CW-MFCs), four commonly used wetland plants, including Canna indica, Cyperus alternifolius L., Acorus calamus, and Arundo donax, were investigated for their electrogenic performance and physiological changes during non-growing seasons. The maximum power output of 12.82 mW/m2 was achieved in the A. donax CW-MFC only when root exudates were being released. The results also showed that use of an additional carbon source could remarkably improve the performance of electricity generation in the C. indica and A. donax CW-MFCs at relatively low temperatures (2–15°C). However, A. calamus withered before the end of the experiment, whereas the other three plants survived the winter safely, although their relative growth rate values and the maximum quantum yield of PSII (Fv/Fm) significantly declined, and free proline and malondialdehyde significantly accumulated in their leaves. On the basis of correlation analysis, temperature had a greater effect on plant physiology than voltage. The results offer a valuable reference for plant selection for CW-MFCs.
Assessment and determinants of per capita household CO_2 emissions (PHCEs) based on capital city level in China

Household CO_2 emissions were increasing due to rapid economic growth and different household lifestyle. We assessed per capita household CO_2 emissions(PHCEs) based on different household consuming demands(including clothing, food, residence, transportation and service) by using provincial capital city level survey data in China. The results showed that:(1) there was a declining trend moving from eastward to westward as well as moving from northward to southward in the distribution of PHCEs.(2) PHCEs from residence demand were the largest which accounted for 44% of the total.(3) Correlation analysis and spatial analysis(Spatial Lag Model(SLM) and Spatial Error Model(SEM)) were used to evaluate the complex determinants of PHCEs. Per capita income(PI) and household size(HS) were analyzed as the key influencing factors. We concluded that PHCEs would increase by 0.2951% and decrease by 0.5114% for every 1% increase in PI and HS, respectively. According to the results, policy-makers should consider household consuming demand, income disparity and household size on the variations of PHCEs. The urgency was to improve technology and change household consuming lifestyle to reduce PHCEs.
Village-level multidimensional poverty measurement in China: Where and how

Village is an important implementation unit of national poverty alleviation and development strategies of rural China, and identifying the poverty degree, poverty type and poverty contributing factors of each poverty-stricken village is the precondition and guarantee of taking targeted measures in poverty alleviation strategies of China. To respond it, we construct a village-level multidimensional poverty measuring model, and use indicator contribution degree indices and linear regression method to explore poverty factors, while adopting Least Square Error(LSE) model and spatial econometric analysis model to identify the villages' poverty types and poverty difference. The case study shows that:(1) Spatially, there is obvious territoriality in the distribution of poverty-stricken villages, and the poverty-stricken villages are concentrated in contiguous poverty-stricken areas. The areas with the highest VPI, in a descending order, are Gansu, Yunnan, Guizhou, Guangxi, Hunan, Qinghai, Sichuan, and Xinjiang.(2) The main factors contributing to the poverty of poverty-stricken villages in rural China include road construction, terrain type, frequency of natural disasters, per capita net income, labor force ratio, and cultural quality of labor force. The main causes of poverty include underdeveloped road construction conditions, frequent natural disasters, low level of income, and labor conditions.(3) Chinese poverty-stricken villages include six main subtypes, and most poverty-stricken villages are affected by multiple poverty-forming factors, reflected by a relatively high proportion of the three-factor dominant type, four-factor coordinative type, and five-factor combinative type.(4) There exist significant poverty differences in terms of geographical location and policy support, and the governments still need to carry out targeted poverty alleviation measures according to local conditions. The research can not only draw a macro overall poverty-reduction outline of impoverished villages in China, but also depict the specific poverty characteristics of each village, helping the government departments of poverty alleviation at all levels to mobilize all kinds of anti-poverty resources.
N0期鼻咽癌颈部淋巴结肿大患者调强放疗的临床治疗思考

背景与目的鼻咽癌(nasopharyngeal carcinoma,NPC)有较高比例的淋巴结转移,淋巴结阳性的治疗指南已经制订。但对于不符合放射标准的淋巴结阳性直径大于10 mm的颈部淋巴结肿大(enlarged neck lymph nodes,ENLNs)患者,还没有给出放射治疗指南。本研究旨在探讨调强放疗(intensity-modulated radiotherapy,IMRT)治疗N0期ENLNs的NPC患者的预后疗效和放射剂量。方法回顾251例接受IMRT治疗的非转移性N0期NPC患者的临床资料。应用受试者工作特征曲线计算预测失败的ENLN直径临界值,计算ENLNs的生物等效剂量(biological equivalent dose,BED)。比较小型和大型ENLN组患者的生存率。应用Cox比例风险回归模型确定独立的预后因素。结果ENLNs≥5.5 mm组患者4年区域无复发生存率高于ENLNs<5.5 mm组患者(100% vs. 98.8%,P = 0.049),而两组的无病生存率、总体生存率和无远处转移生存率无显著性差异。经调整多种因素后,ENLN直径不是独立的预后因素(所有生存率P>0.05)。在亚组分析中,无论是小型ENLN组还是大型ENLN组,接受BED≥72 Gy的患者与接受BED<72 Gy的患者的预后无显著性差异。多因素分析也证实BED≥72 Gy对N0期NPC患者的预后无明显改善作用。结论对ENLNs给予72 Gy的BED足以使N0期NPC患者临床获益。还有必要进行前瞻性研究来验证本研究中的发现。
Nutrient-enhanced n -alkanes biodegradation and succession of bacterial communities

Bioremediation, is an effective and environment-friendly method of cleaning up crude oil pollution after an oil spill. However, the in situ bioremediation of crude oil is usually inhibited by deficiency of inorganic nutrients. To understand the effects of nutrient addition on the bioremediation of crude oil and the succession of bacterial communities during process of bioremediation, microcosms containing oilcontaminated sediments were constructed and biodegradation of crude oil was assessed based on the depletion of different ingredients. We used two culture-independent methods, denaturing gradient gel electrophoresis and a 16S rRNA gene based clone library, to analyze the succession of bacterial communities. The results suggested n -alkanes were degraded after 30 days and that nutrient amendments significantly improved the efficiency of their biodegradation. Moreover, oil contamination and nutrient amendments could dramatically change bacterial community structures. Lower diversity was detected after being contaminated with oil. For instance, bacterial clones affiliated with the phylum Armatimonadetes, Firmicutes, Gemmatimonadetes, and Planctomycetes and the class Deltaproteobacteria and Epsilonproteobacteria could not be identified after 30 days of incubation with crude oil. However, “professional hydrocarbonocastic bacteria” became abundant in samples treated with oil during the bioremediation period, while these clones were almost completely absent from the control plots. Interestingly, bioinformatics analysis showed that even when dramatic differences in oil biodegradation efficiency were observed, bacterial communities in the plots with nutrient amendments were not significantly different from those in plots treated with oil alone. These findings indicated that nutrient amendments could stimulate the process of biodegradation but had less impact on bacterial communities. Overall, nutrient amendments might be able to stimulate the growth of n -alkane degrading bacteria.
Application of first order rate kinetics to explain changes in bloom toxicity—the importance of understanding cell toxin quotas

Cyanobacteria are oxygenic photosynthetic Gram-negative bacteria that can form potentially toxic blooms in eutrophic and slow flowing aquatic ecosystems. Bloom toxicity varies spatially and temporally, but understanding the mechanisms that drive these changes remains largely a mystery. Changes in bloom toxicity may result from changes in intracellular toxin pool sizes of cyanotoxins with differing molecular toxicities, and/or from changes in the cell concentrations of toxic and non-toxic cyanobacterial species or strains within bloom populations. We show here how first-order rate kinetics at the cellular level can be used to explain how environmental conditions drive changes in bloom toxicity at the ecological level. First order rate constants can be calculated for changes in cell concentration( μ_c : specific cell division rate) or the volumetric biomass concentration( μ_g : specific growth rate) between short time intervals throughout the cell cycle. Similar first order rate constants can be calculated for changes in nett volumetric cyanotoxin concentration( μ_(tox) : specific cyanotoxin production rate) over similar time intervals. How μ_c(or μ_g ) covaries with μ tox over the cell cycle shows conclusively when cyanotoxins are being produced and metabolised, and how the toxicity of cells change in response to environment stressors. When μ_(tox) / μ_c >1, cyanotoxin cell quotas increase and individual cells become more toxic because the nett cyanotoxin production rate is higher than the cell division rate. When μ_(tox) / μ_c =1, cell cyanotoxin quotas remains fixed because the nett cyanotoxin production rate matches the cell division rate. When μ_(tox) / μ_c <1, the cyanotoxin cell quota decreases because either the nett cyanotoxin production rate is lower than the cell division rate, or metabolic breakdown and/ or secretion of cyanotoxins is occurring. These fundamental equations describe cyanotoxin metabolism dynamics at the cellular level and provide the necessary physiological background to understand how environmental stressors drive changes in bloom toxicity.
Influence of light availability on the specific density, size and sinking loss of Anabaena flos - aquae and Scenedesmus obliquus

Harmful algal blooms in eutrophic waters pose a serious threat to freshwater ecosystems and human health. In-situ light availability control is one of the most commonly used technologies to suppress algae in lakes and reservoirs. To develop a better understanding of the effects of light on algal growth, specific density, colony size and sinking loss, Anabaena flos - aquae(cyanobacteria) and Scenedesmus obliquus(green algae) were evaluated in varying light scenarios. The results showed that the specific density and colony size of these two species varied during growth, and there were obvious differences among the light scenarios. At the end of exponential phase, S . obliquus incubated under light-limited condition maintained a higher specific density and formed larger aggregates, whereas A . flos - aquae formed a longer filament length. Both species exhibited higher sinking loss rates with lower light availability. These results implied that the sinking loss rate was not always constant but should be considered as a variable response to the change of light availability, and in-situ light availability control might result in a significant increase of the sinking loss of algae due to the change of size and specific density, thereby further affecting the algal biomass in the water column.
Integrating impedance-based growth-rate monitoring into a microfluidic cell culture platform for live-cell microscopy

Growth rate is a widely studied parameter for various cell-based biological studies. Growth rates of cell populations can be monitored in chemostats and micro-chemostats, where nutrients are continuously replenished. Here, we present an integrated microfluidic platform that enables long-term culturing of non-adherent cells as well as parallel and mutually independent continuous monitoring of (i) growth rates of cells by means of impedance measurements and of (ii) specific other cellular events by means of high-resolution optical or fluorescence microscopy. Yeast colonies were grown in a monolayer under culturing pads, which enabled high-resolution microscopy, as all cells were in the same focal plane. Upon cell growth and division, cells leaving the culturing area passed over a pair of electrodes and were counted through impedance measurements. The impedance data could then be used to directly determine the growth rates of the cells in the culturing area. The integration of multiple culturing chambers with sensing electrodes enabled multiplexed long-term monitoring of growth rates of different yeast strains in parallel. As a demonstration, we modulated the growth rates of engineered yeast strains using calcium. The results indicated that impedance measurements provide a label-free readout method to continuously monitor the changes in the growth rates of the cells without compromising high-resolution optical imaging of single cells.