mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Chemical-Looping Reforming of Methane Using Iron Based Oxygen Carrier Modified with Low Content Nickel

Fe_2O_3/Al_2O_3 and Fe_2O_3/Al_2O_3 modified by low content of Ni (below 2% in weight) oxygen carriers were prepared by mechanical mixing and impregnation method. The synthesized oxygen carriers were characterized by means of X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), BET-surface area and temperature programmed reduction (TPR). Besides, redox cyclic reactivity and the performance of chemical looping reforming of methane of the oxygen carriers were studied in a thermal gravimetrical analysis (TGA) and fixed bed at 850 ℃. It was observed that the redox reactivity of the oxygen carriers is improved by Ni addition because synergic effect may occur between NiO and Fe_2O_3/Al_2O_3 to form NiFe_2O_4 and NiAl_2O_4 spinel phases. However, the improvement was not apparent as Ni addition reached 1 wt% or more because more nickel loaded resulted in methane decomposition into H_2 and carbon leading to carbon deposition. The SEM and BET analysis showed that NiFe_2O_4 and NiAl_2O_4 particles dispersed into the pores of the Fe_2O_3/Al_2O_3 particles in the course of preparation.In addition, the resistance to sintering of the modified samples increased with the Ni addition increasing. The results of successive redox cycles showed that the Ni modified Fe_2O_3/Al_2O_3 oxygen carriers have good regenerability. With integration of reactivity and carbon deposition, the content 1.04 wt% of nickel doping was an optimal amount in the three modified samples.
A Fluorescent Chemosensor for Dihydrogen Phosphate Ion Based on 2-[2-Hydroxy-4-(diethylamino) phenyl]-1H-imidazo[4,5-b]phenazine-Fe~(3+) Ensemble

A long wavelength emission fluorescent (612 nm) chemosensor with high selectivity for H_2 PO_4~- ions was designed and synthesized according to the excited state intramolecular proton transfer (ESIPT). The sensor can exist in two tautomeric forms (‘keto’ and ‘enol’) in the presence of Fe~(3+) ion, Fe~(3+) may bind with the ‘keto’ form of the sensor. Furthermore, the in situ generated GY-Fe~(3+) ensemble could recover the quenched fluorescence upon the addition of H_2PO_4~- anion resulting in an off-on-type sensing with a detection limit of micromolar range in the same medium, and other anions, including F~–, Cl~–, Br~–, I~–, AcO~–, HSO_4~- , ClO_4~- and CN~– had nearly no influence on the probing behavior. The test strips based on 2-[2-hydroxy-4-(diethylamino) phenyl]-1H-imidazo[4,5-b]phenazine and Fe~(3+) metal complex (GY-Fe~(3+)) were fabricated, which could act as convenient and efficient H_2 PO_4~- test kits.
心脏性猝死的预防与前景

心脏性猝死的预防仍然是现代医学难题。首先是基础病因的防治,减少冠心病和心力衰竭的发生率可以减少猝死的发生。抗心律失常药物预防猝死效果有限,植入式心脏复律除颤器(ICD)是目前最有效的预防方法,但只能终止恶性心律失常,不能从病因上根治。射频消融治疗可以减少恶性心律失常的发作,远期疗效仍待进一步观察。在改善心功能和延缓心室负性重塑的基础上,联合器械、消融治疗、药物以及生物治疗的综合疗法将进一步减少心律失常和猝死的发生。
《历史流域学论纲》 述评

据侯甬坚先生的追溯,流域学或流域科学的研究实践和提法,地理学界当是走在前边的。然将其引入史学研究,与历史地理相结合,在实践基础上,正式提出“历史流域学”概念的当是王尚义先生。在扎实的长期历史流域学学术研究基础之上,2009年至2010年,以王尚义教授为首的山西省普通高等学校人文社会科学重点研究基地—太原师范学院汾河流域科学发展研究中心的几位学者,连续在 《光明日报》 发表了五篇关于历史流域学的文章,“历史流域学”这一学术名词正式步入学界视野,其理论体系,研究方法等论述,引起了学界相关研究人员的关注。2011年陈桥驿先生就说:“把历史流域学作为一门独立的学科,这是科学发展中的一种创新,有待学术界对此从事深入的探索,使这门学科能够获得充实和发展。”即有肯定,也充满期许。同年11月,在太原师范学院举行了“中国历史流域学首次学术讨论会”,与会二十余位学者,就流域环境变迁与历史地理创新问题进行了深入讨论。
Pharmacokinetics and Residues of Cefquinome in Milk of Lactating Chinese Dairy Cows After Intramammary Administration

The purpose of the study was to investigate the pharmacokinetics of cefquinome in plasma and milk samples of lactating Chinese Holstein following a single intramammary administration into one quarter at the dose of 75 mg. Residue depletion of cefquinome in milk administrated at one quarter following three consecutive infusions at the same dose were also carried out. Cefquinome concentrations in plasma and milk were determined by high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method. A non-compartmental analysis was used to obtain the pharmacokinetic parameters of cefquinome. Following the single treatment, cefquinome wasn’t detected in any of the plasma samples. The concentration of cefquinome in milk reached peaked values (C_(max)) of (599.00±322.00) μg mL~(-1) at 2 h after administration (T_(max)), elimination half-life (t_(1/2λz)) was (4.63±0.26) h, area under the concentration-time curve (AUC_(0-∞)) was (4 890.19±1 906.98) μg mL~(-1) h, and mean residence time (MRT) was (6.03±2.27) h. In residue depletion study, cefquinome concentrations in 5 out of 6 milk samples at 72 h were lower than the maximum residue limit ifxed by the European regulatory agency (20μg kg~(-1) for cefquinome) and cefquinome still could be detected in milk of treated quarters at 120 h post-treatment. The maximum concentration (C_(max)) of cefquinome in milk from treated quarters was (486.50±262.92) μg mL~(-1) and arrived at 6 h after administration (T_(max)), elimination half-life (t_(1/2λz)) was (6.30±0.76) h, area under the concentration-time curve (AUC_(0-∞)) was (44 747.79±11 434.43) μg mL~(-1) h, and mean residence time (MRT) was (10.09±1.40) h. This study showed that cefquinome has the feature of poor penetration into blood and was eliminated quickly from milk in lactating cows after intramammary administration.
Optimization of Ultrasonic-Assisted Extraction Process of Polysaccharides from American Ginseng and Evaluation of Its Immunostimulating Activity

Ultrasonic-assisted extraction (UAE) of American ginseng polysaccharides (AGP) was investigated using response surface methodology. Three-factor-three-level Box-Behnken design was employed to optimize the ultrasonic power, extraction time and ratio of water to raw material to obtain a high AGP yield. The analysis of variance and response surface plots indicated that ultrasonic power was the most important factor affecting the extraction yield. The optimal conditions were ultrasonic power 400 W, extraction time 71 min, and ratio of water to raw material 33 mL g~(-1). Under these conditions, the yield of AGP was 8.09%, which was agreed closely to the predicted value. Gas chromatography (GC) analysis showed that AGP was composed of arabinose, rhamnose, galactose, glucose, and galacturonic acid. Fourier transform infrared spectra revealed the general characteristic absorption peaks of AGP. In addition, AGP exhibited good immunostimulating activities by up-regulating the production of nitric oxide and cytokines. Compared with hot water extraction, UAE required shorter extraction time and gave a higher extraction yield, without changing the structure and immunostimulating activity of AGP. The results indicated that UAE could be an effective and advisable technique for the large scale production of plant polysaccharides.
A Critical Review on Superchilling Preservation Technology in Aquatic Product

aquatic product, known as one of the good resources for white meat, has been widely accepted by the consumers due to its high protein, low fat, especially low cholesterol. With the fast development of living standards around the world, the consumer demands for high quality, nutrition, safety and freshness of ifshery food are increasing. Thus, high efifcient preservation technologies for aquatic products become particularly important. Superchilling is one of the controlled-temperature preservation technologies for seafood. Aquatic products can be kept in better quality under superchilling conditions. This review introduced the principle and development of superchilling process, mainly focusing on research progresses and technical dififculties of superchilling. The growth mechanism of ice crystals and the feasibility of application of computational lfuid dynamics in analyzing the temperatures variation and ice crystals during superchilling progress were also discussed, which will provide theoretical foundation for its improvement and application.
Effect of Nitric Oxide on the Interaction Between Mitochondrial Malate Dehydrogenase and Citrate Synthase

Mitochondrial malate dehydrogenase (mMDH) and citrate synthase (CS) are sequential enzymes in Krebs cycle. mMDH, CS and the complex between mMDH and CS (mMDH+CS) were treated with nitric oxide solution. The roles of notric oxide (NO) on the secondary structures and the interactions between mMDH and CS were studied using circular diehroism (CD) and Fourier transform surface plasmon resonance (FT-SPR), respectivley. The effects of NO on the activities of mMDH, CS and mMDH+CS were also studied. And the regulations by NO on mMDH and CS were simulated by PyMOL software. The results of SPR conifrmed that strong interaction between mMDH and CS existed and NO could signiifcantly regulate the interaction between the two enzymes. NO reduced the mass percents ofα-helix and increased that of random in mMDH, CS and mMDH+CS. NO increased the activities of CS and mMDH+CS, and inhibited the activity of mMDH. Graphic simulation indicated that covalent bond was formed between NO and Asn242 in active site of CS. However, there was no direct bond between NO and mMDH. The increase in activity of mMDH+CS complex depended mostly on the interaction between NO and CS. All the results suggested that the regulations by NO on the activity and interaction between mMDH and CS were accord with the changes in mMDH, CS and mMDH+CS caused by NO.
Genome-Wide Association Study for Certain Carcass Traits and Organ Weights in a Large White×Minzhu Intercross Porcine Population

Porcine carcass traits and organ weights have important economic roles in the swine industry. A total of 576 animals from a Large White×Minzhu intercross population were genotyped using the Illumina PorcineSNP60K Beadchip and were phenotyped for 10 traits, speciifcally, backfat thickness (6-7 libs), carcass length, carcass weight, foot weight, head weight, heart weight, leaf fat weight, liver weight, lung weight and slaughter body weight. The genome-wide association study (GWAS) was assessed by Genome Wide Rapid Association using the mixed model and regression-genomic control approach. A total of 31 single nucleotide polymorphisms (SNPs) (with the most signiifcant SNP being MARC0033464, P value=6.80×10~(-13)) were located in a 9.76-Mb (31.24-41.00 Mb) region on SSC7 and were found to be signiifcantly associated with one or more carcass traits and organ weights. High percentage of phenotypic variance explanation was observed for each trait ranging from 31.21 to 67.42%. Linkage analysis revealed one haplotype block of 495 kb, in which the most signiifcant SNP being MARC0033464 was contained, on SSC7 at complete linkage disequilibrium. Annotation of the pig reference genome suggested 6 genes (GRM4, HMGA1, NUDT3, RPS10, SPDEF and PACSIN1) in this candidate linkage disequilibrium (LD) interval. Functional analysis indicated that the HMGA1 gene presents the prime biological candidate for carcass traits and organ weights in pig, with potential application in breeding programs.
目的基因拷贝数定量方法快速筛查缺失型α-地中海贫血

α-地中海贫血(α-地贫)是全球最常见、对人类健康影响最大的单基因遗传病之一,我国南方广西、广东、江西、四川等省份和地区的人群携带率分别高达 17. 55%、8. 53%、2. 60%、1. 92% 。此病目前缺乏有效治疗手段,通过人群筛查与遗传咨询,对高风险胎儿实施产前诊断而阻止重症患儿出生,是国内外公认的首选预防措施。随着以降低地贫患儿出生率为目标的预防计划与措施的相继实施,适合大规模人群筛查和常规分子诊断的高通量检测技术与方法,是这些项目实施的技术支撑条件,也是当前地中海贫血分子诊断技术研究领域所面临的重要课题,其中准确有效的遗传筛查方法,即筛出高风险夫妇而对其胎儿进行产前诊断,是实现此病人群防控目标的前提与基础。缺失型α-地贫的分子机制是α珠蛋白基因缺失,其缺失数目是其临床表现及分型的依据。据此发病机制及分子基础,准确分析a珠蛋白基因的缺失及缺失数目,即能实现缺失型α-地贫的分子诊断。本研究应用a珠蛋白目的基因拷贝数相对定量技术,对正常人群样本进行缺失型α-地贫分子筛查研究。
开放性颅脑损伤司法鉴定1例

根据《中华人民共和国侵权责任法》有关医疗侵权损害赔偿的有关规定,医务人员是否违反法律、行政法规、规章以及其他有关诊疗规范的规定是判断医方有无医疗过错的具体标准,而医务人员在诊疗活动中是否尽到与当时医疗水平相应的诊疗义务是判断医方有无医疗过错的抽象标准。后者又包括告知义务、获得知情同意、预见义务、回避义务和转医义务等特殊注意义务。
软骨样脂肪瘤一例

讨论软骨样脂肪瘤是新近认识的一种独特的良性脂肪组织肿瘤,含有脂肪母细胞、成熟脂肪和软骨样基质,非常相似于黏液样脂肪肉瘤和骨外黏液样软骨肉瘤,十分罕见,目前国内仅见个案病理报道,尚未见影像学报道。本病好发于成年女性,亦可见于青少年及老年(本例为16岁女性)。其大体病理特征为肿块常有完整包膜或界限清楚,通常体积较大,本例10.5 cm×5.6 cm×8.5 cm,切面呈各种不同的黄色,仅个别病例呈白色、珍珠白或粉红褐色,实性。光镜下见肿瘤边界完整和推挤状,有些肿瘤有较厚的纤维性包膜或呈分叶状。肿瘤由脂肪母细胞、黏液透明性软骨样基质和成熟脂肪细胞3种成分以不同比例混合构成。脂肪母细胞间常见多量黏液透明性软骨样基质,并可见透明性变和纤维素沉积混合区域,此外还可见数量不等的成熟脂肪细胞。电镜下可见不同分化程度的细胞,从具有前脂母细胞及软骨母细胞特征的原始细胞到脂母细胞、前脂肪细胞、成熟脂肪细胞。CT显示肿瘤为软组织密度、脂肪密度和大量钙化密度,CT值范围很大,脂肪密度低至-118 HU,钙化密度高达1226 HU。大部分病灶内3种组织密度相间,局部可见囊样表现,囊壁为钙化,囊内为软组织和脂肪组织。
肝右叶肿块--请分析病变性质

讨论肝脏未分化胚胎性肉瘤(undifferentiated embryonal sarcoma of liver,UESL)1978年由Stocher和Ishak首先报道并命名,为发生于肝原始间叶组织的高度恶性肿瘤,仅占肝原发恶性肿瘤的0.1%~2%,好发于6~10岁儿童,成人极其罕见,无明显性别差异。组织学可分为未分化型、胚胎型、胎儿型及混合型。肿瘤多位于肝右叶,但也可位于左叶或两叶同时受累。镜下可见未分化的原始胚胎性间叶细胞,呈梭形或星芒状。组织学最具特征性改变为PAS染色阳性的嗜酸性小体。临床表现为腹部肿块、腹痛及体重减轻,也可出现发热,AFP、CEA及CA199正常,预后不良。
Experimental investigation on diffusive contaminant release from permeable sediment layer under unidirectional unsteady flow

The interfacial diffusive contaminant (phosphorus) release from permeable sediment layer into overlying water column under a unidirectional unsteady (periodic) flow condition was experimentally measured and analyzed. The experimental results indicate that the gross diffusive contaminant release rate is substantially enhanced as compared to that under a steady flow condition, and this enhancement trend is much more pronounced in an immediate release stage. The interfacial diffusive contaminant release rate tends to increase with the increasing flow velocity, decreasing period and augmenting amplitude for the case of the unsteady flow. The additional interfacial diffusive contaminant release under the unsteady flow condition may be related to the hydrodynamic response of the diffusive boundary layer to the flow unsteadiness of the overlying water, depending upon not only the periodic thickness variation of the diffusive boundary layer immediately above the sediment-water interface modulated by the temporal flow velocity of the overlying water column but also the intensified turbulent mixing between the overlying water and the pore-water within the superficial sediment layer induced by an alternate acceleration/deceleration fluctuation during each period.
Experimental study of flow field in interference area between impeller and guide vane of axial flow pump

Axial flow pump is a kind of typical pumps with rotor-stator interaction, thus the measurement of the flow field between impeller and guide vane would facilitate the study of the internal rotor-stator interaction mechanism. Through a structural modification of a traditional axial flow pump, the requirements of particle image velocimetry (PIV) measurement are met. Under the condition of 0.8Q_(opt), the axial vortex is identified between impeller hub and guide vane hub, which is developed into the main flow and to affect the movement when the relative positions of impeller and guide vane at different flow rates are the same. Besides, the development and the dissipation of the tip leakage and the passage vortex in impeller passages are mainly responsible for the difference of the flow field close to the outer rim. As the flow rate decreases, the distribution of the meridional velocities at the impeller outlet becomes more non-uniform and the radial velocity component keeps increasing. The PIV measurement results under the condition of 1.0Q_(opt) indicate that the flow separation and the trailing vortex at the trailing edge of a blade are likely to result in a velocity sudden change in this area, which would dramatically destroy the continuity of the flow field. Moreover, the radial direction of the flow between impeller and guide vane on the measurement plane does not always point from hub to rim. For a certain position, the direction is just from rim to hub, as is affected by the location of the intersection line of the shooting section and the impeller blade on the impeller as well as the angle between the intersection line and the rotating shaft.
Theoretical and experimental studies of the transport process of micro-particles in static water

A theoretical model is established in this paper to investigate the micro-particle behavior in the static water. The forces acting on the micro-particles are analyzed to obtain a description of the micro-particle behavior in the static water. It is shown that the velocity of the micro-particles is a function of the diameter of the micro-particles, the density of the fluid and the micro-particles, the viscosity and the time. The micro-particle's motion undergoes an accelerating period and a constant velocity period, and the acceleration period of small micro-particles is very short, its velocity is much smaller than that of larger ones. The net flux of a control-volume in the flow field is calculated combined with the Fick Law. It is shown that the transport coefficient is a function of the diameter of the micro-particles, the density of the fluid and the micro-particles, the viscosity and the temperature. The transport of smaller particles is more extended than the larger ones. The digital holography technology is applied to detect the micro-particle's motion and the comparison between the theoretical solution and the experimental results is made, with a quantitative agreement between them.
Three-dimensional analysis of relationship between relative orientation and motion modes

Target motion modes have a close relationship with the relative orientation of missile-totarget in three-dimensional highly maneuvering target interception. From the perspective of relationship between the sensor coordinate system and the target body coordinate system, a basic model of sensor is stated and the definition of relative angular velocity between the two coordinate systems is introduced firstly. Then, the three-dimensional analytic expressions of relative angular velocity for different motion modes are derived and simplified by analyzing the influences of target centroid motion, rotation around centroid and relative motion. Finally, the relationships of the relative angular velocity directions and values with motion modes are discussed. Simulation results validate the rationality of the theoretical analysis. It is demonstrated that there are significant differences of the relative orientation in different motion modes which include luxuriant information about motion modes. The conclusions are significant for the research of motion mode identification, maneuver detection, maneuvering target tracking and interception using target signatures.
Identification method for helicopter flight dynamics modeling with rotor degrees of freedom

A comprehensive method based on system identification theory for helicopter flight dynamics modeling with rotor degrees of freedom is developed. A fully parameterized rotor flapping equation for identification purpose is derived without using any theoretical model, so the confidence of the identified model is increased, and then the 6 degrees of freedom rigid body model is extended to 9 degrees of freedom high-order model. Bode sensitivity function is derived to increase the accuracy of frequency spectra calculation which influences the accuracy of model parameter identification. Then a frequency domain identification algorithm is established. Acceleration technique is developed furthermore to increase calculation efficiency, and the total identification time is reduced by more than 50% using this technique. A comprehensive two-step method is established for helicopter high-order flight dynamics model identification which increases the numerical stabil-ity of model identification compared with single step algorithm. Application of the developed method to identify the flight dynamics model of BO 105 helicopter based on flight test data is implemented. A comparative study between the high-order model and rigid body model is performed at last. The results show that the developed method can be used for helicopter high-order flight dynamics model identification with high accuracy as well as efficiency, and the advantage of identified high-order model is very obvious compared with low-order model.
Uncertain multiobjective redundancy allocation problem of repairable systems based on artificial bee colony algorithm

Based on the uncertainty theory, this paper is devoted to the redundancy allocation problem in repairable parallel-series systems with uncertain factors, where the failure rate, repair rate and other relative coefficients involved are considered as uncertain variables. The availability of the system and the corresponding designing cost are considered as two optimization objectives. A crisp multiobjective optimization formulation is presented on the basis of uncertainty theory to solve this resultant problem. For solving this problem efficiently, a new multiobjective artificial bee colony algorithm is proposed to search the Pareto efficient set, which introduces rank value and crowding distance in the greedy selection strategy, applies fast non-dominated sort procedure in the exploitation search and inserts tournament selection in the onlooker bee phase. It shows that the proposed algorithm outperforms NSGA-II greatly and can solve multiobjective redundancy allocation problem efficiently. Finally, a numerical example is provided to illustrate this approach.
食管胃静脉曲张内镜治疗后近期出血的常见技术因素与防范

近年来,随着消化内镜技术的飞速发展和进步,内镜治疗已成为食管胃静脉曲张(esophageal and gastric varices, EGV)的首选治疗方法。但内镜治疗后再出血的风险较高,有些患者的术后出血甚至是致死性的。治疗后发生近期出血的发生率也很高,文献[2-5]报道,内镜下食管静脉曲张套扎术(endoscopic variceal ligation,EVL)后近期再次出血的发生率为9%~19%,食管静脉曲张硬化治疗后再出血的发生率36.2%,胃静脉曲张黏合剂栓塞术后再出血发生率10%~31%。
Loss of bifurcation patency after cross-over stenting of ostial lesions in superficial femoral artery: possible causes, prevention and reintervention

Background Crossover stenting across the origin of the profunda femoral artery (PFA) and occasionally into the common femoral artery (CFA) is commonly used after suboptimal balloon angioplasty of ostial occlusive lesions of the superficial femoral artery (SFA) involving the bifurcation.Late stent occlusion at the bifurcation is not rare and results in severe lower extremity ischemia.Therefore,we tried to assess its possible causes,prevention and reintervention.Methods Using a prospectively maintained single-center database,12-month femoral bifurcation patency was retrospectively compared and lesion and procedural predictors of stent occlusion were determined among 63 patients (64 lesions) who between July 2011 and February 2013 underwent crossover (36 non-jailed and 15 jailed SFA,and 12 distal and 1 complete CFA) stenting of de novo ostial SFA lesions.Results Twelve-month overall patency rate at the femoral bifurcation was 88%,with no significant difference between jailed-ostial SFA (80%) and distal CFA (67%) stenting (P=0.731),and significant differences between either and non-jailed ostial stenting (100%,P=0.035 and 0.002).When PFA ostium was jailed by the stent,patients with preexisting CFA or PFA lesions had a 12-month bifurcation patency rate of 20%,significantly lower than those with simple ostial SFA lesions (83%,P=0.015).Stent induced intimal hyperplasia caused bifurcation occlusion in 6 surgical reintervention cases.Conclusions In crossover stenting of ostial lesions in SFA,bifurcation patency loss was significantly higher in distal CFA and jailed ostial SFA stenting than non-jailed ostial SFA stenting.Preexisting CFA or PFA lesion is a significant risk factor for bifurcation patency loss when PFA ostium is jailed by crossover stenting.