Idiom Comprehension of Chinese Patients With Aphasia: A Case Study

Previous studies on idiom comprehension of patients with aphasia(PWAs)mainly focused on Indo-European speakers,examining whether PWAs could correctly extract the target meaning of idioms,while among Chinese PWAs,idiom familiarity,context and other variables affecting idiom comprehension were rarely studied.Hence,this study aims to explore whether Chinese PWAs can correctly comprehend the target meaning of idioms,and further investigate the role of familiarity and context.For three Chinese PWAs,this study adopted the string-to-word matching task,taking Chinese four-character idioms as the experimental stimuli,and provided decoy words containing target meaning,literal meaning,unrelated abstract meaning and unrelated concrete meaning as the matching words of idiom items by manipulating the familiarity and contextual presence of idiom items.The results suggested that the PWAs could not correctly extract the target meaning of idioms and presented both the literal meaning tendency and the weak abstract meaning tendency,and the influence of familiarity on the comprehension of idioms was stronger than that of context.These results support the Graded Salience Hypothesis.

低噪音润滑脂的基础研究

通过对锂基润滑脂基础油和冷却方式的考察,发现基础油和冷却方式对润滑脂的噪音性能影响不同,对环烷基油,控温冷却制备的润滑脂具有较好的噪音特性,而基础油是季戊四醇酯+环烷基油的混合油时,自然冷却制备的润滑脂具有较好的噪音特性。

自修复添加剂及在润滑脂中的应用

探讨了自修复添加剂在润滑脂中的应用,以寻求延长轴承使用寿命的新途径。

微米铜在润滑脂中自修复性能的评价

通过四球试验评价了微米铜在润滑脂中的自修复作用。结果表明:在适当的摩擦条件下,微米铜在摩擦表面沉积并与基体金属及磨损微粒熔合,重新组合为共晶焊接在摩擦表面上,形成自修复膜,使磨损得到补偿。

水基金属加工液润滑添加剂的使用

水基润滑添加剂的选用不仅要满足金属加工的要求,还必须与金属加工液的其他组分相容,避免对人体健康和环境造成危害。

齿形联轴器润滑脂台架试验的研究

研究了一种评价齿形联轴器润滑脂性能的台架试验方法,该方法解决了评定齿形联轴器润滑脂性能的问题。

水溶性润滑添加剂的现状和发展

从分子设计和纳米技术方面介绍了水溶性润滑添加剂的现状和发展,建议加强对水溶性润滑添加剂的研究。

合成长寿型金属加工液

用水溶性聚醚研制的合成长寿型金属加工液的性能达到了GB6144-85标准,单机使用周期超过1年,可替代进口磨削液使用。

Microstructure, mechanical and corrosion properties of magnesium alloy bone plate treated by high-energy shot peening

To enhance the mechanical properties and corrosion resistance of magnesium alloys,high-energy shot peening(HESP)was used.According to the results,the in-situ surface nanocrystallization(ISNC)microstructure was fabricated on the magnesium alloy surface,and its formation mechanism was the coordination among twins,dislocations,subgrain boundary formation and dynamic recrystallization.Under the released surface stress of sample,the residual compressive stress and microhardness rose,thus enhancing compactness of the surface passivation film Mg(OH)2.Besides,the corrosion rate dropped by 29.2% in maximum.In the polarization curve,the maximum positive shift of the corrosion potential of sample was 203 mV, and the corrosion current density decreased by 31.25% in maximum.Moreover,the compression resistance and bending resistance of the bone plate were enhanced,and the maximum improvement rates were 18.2% and 23.1%,respectively.Accordingly,HESP significantly enhanced mechanical properties and corrosion resistance of magnesium alloys.

Coupled cobalt-doped molybdenum carbide@N-doped carbon nanosheets/nanotubes supported on nickel foam as a binder-free electrode for overall water splitting

In an attempt to develop low-cost,non-noble-metal bifunctional electrocatalysts for water electrolysis in alkaline media,cobalt-doped molybdenum carbide@N-doped carbon nanosheets/nanotubes were fabricated by using C3N4 as the carbon source on a 3D porous nickel foam substrate.Benefiting from the optimized electronic structure and enhanced mass and charge transport,as well as the 3D conducting pathway,MoxCoy@N-CNSs/CNTs shows superior performance towards both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in an alkaline medium.The optimal electrocatalyst is Mo2Co1@N-CNSs/CNTs,which reveals a current density of 10 mA cm^-2 at the low overpotentials of 99 mV and 300 mV for the HER and OER,respectively,and a relatively low cell voltage(1.63 V)for the overall water electrolysis.The method of optimizing the composition and nanostructure of a material provides a new avenue for the development and utilization of high-performance electrocatalysts.

Propagation velocity measurement for flame of gas explosion in horizontal tube

In coal industry,gas explosion accidents emerge constantly,causing enormous casualties and poorer material property.In the course of studying gas exploding mechanism,the propagation velocity of the flame wave front is one of the most important factors.A set of flame velocity measuring system was designed according to the horizontal pipelined experimental facility of North University of China to study the effects of the quantity and blockage ratio of the circle ring obstacle on the flame propagation velocity in the inclosed tube.The research results show that the obstacle has obviously accelerating effect on the flame wave of gas explosion With the increase of quantity and blockage ratio of the obstacle,the flame accelerating effect becomes more obvious and the flame accelerating persistence is intenser,of which the effect of the quantity of the obstacle on the flame accelerating persistence is larger,but the effect of the blockage ratio of the obstacle on the flame accelerating persistenceis not obvious.

A new variable step-size LMS method and its application in DOA estimation of OFDMA signals

To meet the requirements of quick positioning of mobile terminals from base stations(BSs)or third-party devices,as well as to improve the convergence speed and reduce the steady state maladjustment of the least mean square(LMS)method,a new logarithmic-sigmoid variable step-size LMS(LG-SVSLMS)was proposed and applied to estimate the direction of arrival(DOA)of orthogonal frequency division multiple access(OFDMA)signals.Based on the proposed LG-SVSLMS,a non-blind DOA estimation system for OFDMA signals was constructed.The proposed LG-SVSLMS adopts a new multi-parameter step-size update function which combines the sigmoid function and the logarithmic function.It controls the adjustment magnitude of step-size during the initial and steady state phases of the LMS method to achieve both a high convergence speed and low steady state maladjustment.Finally,simulation was conducted to verify the performance of the LG-SVSLMS.The simulation results show that the non-blind DOA estimation system based on the LG-SVSLMS can accurately estimate the DOA of the target signal in the scenario where interference signals from multi-source and multi-path fading signals arrive at the third-party devices asynchronously with the target signal,and the estimation deviation is within±3°.The non-blind DOA estimation for OFDMA signals with the proposed LG-SVSLMS is of great significance for the instant positioning technology of mobile terminals based on the adaptive antenna array.

Suppression effect of solid inertants on coal dust explosion

The effect of solid inertants like rock dust on explosion suppression was experimentally tested.By adding solid inertants with different concentrations into three kinds of coal dust,the maximum explosion pressure P max and the rate of explosion pressure rise(d p/d t)max were acquired.Based on this,the suppression effect of rock dust on coal dust explosion was analyzed.The experimental and analytical results show that there are two major factors that play an important role in explosion suppression:composition of solid inertant and particle size of solid inertant.The higher the concentration of solid inertant and the smaller the particle size of solid inertant,the better the suppression effect.In addition,the smaller the particle size of coal dust,the larger the amount of rock dust.

Concept and evaluation method of equipment system of systems contribution rate

To scientifically evaluate the equipment system of systems(SoS)contribution rate,a contribution rate calculation method based on a structural equation model(SEM)is proposed in this paper.The connotation and evaluation process of the equipment SoS contribution rate were redefined and standardized.To solve the existing problems in the application of the original contribution rate formula,a modified contribution rate calculation formula is proposed.Finally,the contribution rate evaluation index was divided into latent and explicit variables.The measurement and structural equations in the SEM were used to calculate and analyze the latent variables.The simulation results show that the number of defense lines of air defense weapon equipment has a greater impact on the linear configuration than the group configuration.When the number of K-type air defense weapons is sufficient,the two-layer linear configuration should be adopted with 20 air defense weapon systems.When the number of K-type air defense weapons is insufficient,the single-layer group configuration should be adopted with 12 air defense weapon systems.

Effect of particle size of coal dust on explosion pressure

The effect of the particle size of coal dust on explosion pressure and the rising rate of explosion pressure is studied. Three coal dusts from Lingan Coal Mine in Canada and Datong Coal Mine in China are selected to test. The influence of particle size on the maximum explosion pressure P max and maximum pressure rising rate (d p /d t ) max of each coal dust was tested experimentally. The results indicate that with the decrease of particle size of coal dusts, explosion pressure increases on condition of the same concentration. If the concentration of coal dust is different, the maximum explosion pressure appears at the concentration of 500 g/m^3. The smaller the particle size of coal dusts, the larger the rising rate of explosion pressure of coal dust. When the concentration of coal dust is 500 g/m^3, the rising rate of explosion pressure of each coal dust is the maximum.

舰用油料快速检测技术进展

简要介绍了舰用油料快速检测技术及仪器的研究进展,对我军油料快速检测提出了建议。

Packaging category and its influencing factors of potassium nitrate

To understand the combustion characteristics of potassium nitrate and evaluate the magnitude of combustion risk, ox-idation solid test apparatus is used and the updated experimental criterion of the United Nations is adopted to measure the pack-aging category of potassium nitrate. The new criterion puts calcium peroxide and microcrystalline cellulose as references and burning rate as evaluation index. Effects of mixing ratio and insert medium on burning rate are reached. Test results show that pure potassium nitrate doesn＇t burn under normal temperature and pressure, however, its oxidation is very strong and the packaging category should choose the class I. As the mass fraction of potassium nitrate reduces, the burning rate first increases and then decreases. When the ratio is 2 ： 1,the combustion rate reaches the maximum, and the effect of combustion is the best. When 1 ： 3, the combustion rate is the minimum. The mixture combustion can be suppressed by silicon dioxide and hy-drogen phosphate, which is not fired when silica concentration is 40% or ammonium hydrogen potassium phosphate is 55%, their effects are very obvious.

Experimental study on explosion limit of M15 methanol-gasoline mixture

The explosion characteristics of M15 methanol-gasoline mixture was experimental test by using FRTA explosion limit instrument.The effect of temperature on the explosion area of the sample was studied.The results show that the lower explosion limit of M15 methanol-gasoline mixture is 1.716%and the upper explosion limit is 11.451%at the initial temperature of 80℃.The lower explosion limit of M15 methanol-gasoline is in the range of 1.711%-1.760%with the initial temperature from 25℃to 100℃,and the upper explosion limit of the sample changes between 11.253%and 11.451%.Considering experimental error and precision,it can be approximated that the temperature has little influence on the explosion area of M15 methanol-gasoline mixture.

硼酸酯摩擦化学反应的热力学分析

在高温高压下,硼酸三丙酯具有极压抗磨性能,从热力学的角度分析了硼酸三丙酯在摩擦界面发生的摩擦化学反应。

Clinical efficacy of Salvia miltiorrhiza in pathological scar treatment:A systematic review and meta-analysis

To systematically assess the clinical efficacy of Salvia miltiorrhiza(SM)in treating pathological scars and provide a reference basis for scar pharmacotherapy,we conducted a comprehensive literature search in both English and Chinese databases from database inception to December 2022.Key search terms included Salvia miltiorhiza,cryptotanshinone,tanshinone IIA,sodium-tanshinol,compound Salvia miltiorrhiza dripping pills,cicatrix,cicatrices,and scar.The inclusion criteria encompassed all clinical randomized controlled studies on the treatment of pathological scars with SM,without regard to blinding or allocation concealment,as well as irrespective of patient nationality,race,or age.Data from the selected literature were subjected to analysis using Rev Man 5.4 software,employing the standard mean difference or weighted mean difference for numerical variables and odds ratios(ORs)for dichotomous variables.Statistical significance was set at P<0.05.Six eligible studies involving a total of 778 patients met the inclusion criteria.The analysis revealed a significant therapeutic efficacy with an OR of 3.83(95%CI:2.65–5.54),indicating a substantially higher therapeutic efficacy rate in SM group compared to the control group.Furthermore,the total effective rate of treatment exhibited an OR of 6.94(95%CI:2.53–19.06),signifying a significantly superior treatment outcome in SM group.Regarding scar scores,no significant improvement was observed in SM group compared to the control group after 3 months of treatment(mean difference[MD]=–0.96,95%CI:–2.29–0.36).However,after 6 months of treatment,the scar score demonstrated a noteworthy improvement in SM group(MD=–1.37,95%CI:–2.44 to–0.30)compared to the control group.In summary,this study affirmed that SM treatment markedly enhanced the therapeutic efficacy and overall treatment efficiency for clinical scar patients,underscoring its positive clinical therapeutic impact on scar patients.