题元约束理论与介补结构的题元指派

本文在威廉斯题元约束的理论框架下探讨介补结构的题元指派问题.根据威廉斯,(1)题元理论具有自主性,短语在语境中具有述谓功能或指称功能不影响短语的内题元结构与外题元功能;(2)题元指派具有局部性,即题元指派必须在题元统制所规定的作用域内进行,被指派成份的词首外题元是谓词题元指派的界限节点.就介补结构而言,题元可以指派给整个介补结构,也可以单独指派给介词后的补语.介补结构中介词词首的性质决定题元指派的不同对象.若介词为语法性介词/非题元介词,题元则被单独指派给介补结构中的补语;若介词为实义性介词/题元介词,则题元被谓词指派给整个介补结构,结构中补语的题元由介词词首内题元指派.

上榆泉煤矿洗选中心密度自动控制系统研发及应用

针对上榆泉煤矿洗选中心重介系统密度控制滞后、不及时,人工加介工程量大、精确度低,半自动控制系统精度低、不及时,导致液位、密度不稳定,重介分选机分选效果不稳定、介耗增加、运行成本高的问题,采用移动射流技术的自动冲介装置,代替原有人工机械推介,并增设与原生产系统独立的制介系统,系统空闲状态下完成加介、制介功能。研发液位优先的逻辑控制系统,综合考虑合介桶的液位和密度的不同状态的组合,从动态发展的角度出发预制了加介、分流、补水的控制关系,可保持选后产品的质量稳定及分选系统的正常稳定运行,减少人为调整不及时,在实现降低成本的同时,选后产品的质量更加稳定。分选系统的正常稳定运行,有效控制了生产、煤质事故。

Mechanism of grout bulb expansion and its effect on ground uplifting

In order to study the uplifting effect of compensation grouting on ground surface and the upper structures,the ground heave induced by stratum expansion was considered as a stochastic process and the stochastic medium theory was applied to determine the heave and deformation of ground surface under uniform and non-uniform expansion models of spherical grout bulb.The corresponding calculating formulas and simplified methods were derived based on the hypotheses of radial expansion.Then,a numerical model,in which radial velocity was imposed on the outer nodes of grout bulb to simulate the expansion process reaching a required volume strain,was established simultaneously.This new method avoids repeated trial calculation needed in the traditional method which applies a "fictitious" expanding pressure in the grouting elements.The results show that the numerical solutions have good consistency with the theoretical ones.Meanwhile,though the heave resulting from non-uniform expansion is larger than that from uniform expansion for shallow grouting,both of them tend to be convergent with the increasing of grouting depth.

Alkylation of p-Cresol with tert-Butanol Catalyzed by Novel Multiple-SO_3H Functioned Ionic Liquid

The alkylation of p-cresol with tert-butanol（TBA）to 2-tert-butyl-p-cresol（TBC）catalyzed by a novel multiple-SO3H functioned ionic liquid（IL1）was investigated.Meanwhile,the catalytic activity of this novel ionic liquid was compared with other four traditional ionic liquids.The results showed that IL1 has superior catalytic activity to other four traditional ionic liquids with the conversion of 85.3%and selectivity of 95.2%.Also,the reaction conditions were investigated to obtain the optimum conditions.Operational simplicity,small amount of usage,high activity,reusability and selectivity are the key features of this methodology.

Application of proteomic approaches to assess the effect of anti-epileptic drug on seizure foci

Epilepsy is one of the most common neurological disorders characterized by epileptic seizures.The anti-epileptic drugs(AEDs)are the main form of treatment for people with epilepsy.Classically,people thought that AEDs modify the activities of ion channels to suppress epileptic seizures.However,accumulating evidence suggests that targeting at ion channels cannot completely account for the numerous effects of the AEDs on its broad clinical activity in epileptic patients.In our study,proteomic methods were used to quantify the proteome of hippocampal tissues from patients who were treated or not treated by AEDs(Carbamazepine).Further bioinformatics methods,including Gene Ontology(GO)annotation and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analysis,were utilized to analyze the differences between two patient groups.We found that more than 400 proteins,including metabolism and immune related proteins,had a higher expression level in the carbamazepine-treated group compared with the controls.These altered proteins were considered to be involved in many different biological pathways.Among these pathways,immune-system related pathway modulated by complement C3 and microglia was highly remarkable,which regulated the synapses elimination in physiological condition.In epilepsy,the carbamazepine induced up-regulation of complement C3 might decrease the abnormal synaptic connections between neurons and thus contribute to the therapeutic role of carbamazepine.The results of our study suggested that apart from ion channels,carbamazepine exerted numerous effects on human epileptic foci,which might be the fundamental mechanisms of AEDs for treatment,adverse-effects and pharmacoresistance of epilepsy.

Analysis and design of pulse frequency modulation dielectric barrier discharge for low power applications

For low power dielectric barrier discharge （DBD） used in small-size material treatment or portable devices, high- step transformer parasitic capacitance greatly influences the performance of the resonant converter as it is of the same order of magnitude as the equivalent capacitance of DBD load. In this paper, steady-state analysis of the low power DBD is presented, considering the inevitable parasitic capacitance of the high-step transformer. The rectifier-compensated first harmonic approxi- mation （RCFHA） is applied to linearize the equivalent load circuit of DBD at low frequency and the derived expressions are accurate and convenient for the analysis and design of the power supply. Based on the proposed linear equivalent load circuit, the influence of transformer parasitic capacitance on the key parameters, including the frequency range and the applied electrode voltage, is discussed when the power is regulated with pulse frequency modulation （PFM）. Also, a design procedure is presented based on the derived expressions. A prototype is constructed according to the design results and the accuracy of the design is verified by experimental results.