摘要：The radial force is a critical factor to determine the sealing performance of radial lip *** effects of radial force produced by garter spring and interference on the static contact properties and sealing performance of a radial lip seal are investigated by numerical simulations and ***-element analysis and mixed elastohydrodynamic lubrication simulation are *** force,contact width,temperature in the sealing zone,the reverse pumping rate and friction torque are measured.A critical value of interference for a cost-effectively designed radial lip seal is *** force is required to compensate the decrease of the radial force because of the interference and used as a possible way to obtain intelligent control of sealing *** quantitative results gotten in this study could provide guide for the seal design and improvement.

摘要：The underlying spin-related mechanism remains unclear,and the rational manipulation of spin states is challenging due to various spin configurations under different coordination ***,it is urgent to study spin-dependent oxygen evolution reaction(OER)performance through a controllable ***,we adopt a topochemical reaction method to synthesize a series of selenides with eg occupancies ranging from 1.67 to *** process begins with monoclinic-CoSeO_(3),featuring a distinct laminar structure and Co-O6 *** topochemical reaction induces significant changes in the crystal field's intensity,leading to spin state *** transitions are driven by topological changes from a Co-O-Se-O-Co to a Co-Se-Co configuration,strengthening the crystalline field and reducing eg orbital *** reconfiguration of spin states shifts the rate-determining step from desorption to adsorption for both OER and the hydrogen evolution reaction(HER),reducing the potential-determined step barrier and enhancing overall catalytic *** a result,the synthesized cobalt selenide exhibits significantly enhanced adsorption *** material demonstrates impressive overpotentials of 35 mV for HER,250 mV for OER,and 270 mV for overall water splitting,indicating superior catalytic activity and ***,a negative relation between eg filling and OER catalytic performance confirms the spin-dependent nature of *** findings provide crucial insights into the role of spin state transitions in catalytic performance.

摘要：The study,using an interlanguage corpus,investigates how international students in China acquire“prepositional phrase-verb”word *** found that students whose mother tongue features VO and OV word order mostly produce pre-placement structure of“prepositional phrase+verb”,which is similar to Chinese word order and hence reflects an overt influence of the target ***,when producing post-placement structure of“verb+prepositional phrase”,VO type L1 speaking students slightly outnumber those OV type L1 speaking students,which indicates limited influence of L1 *** addition,other factors such as the relator principle and the temporal iconicity principle also exert certain influence on the word order acquisition of“prepositional phrase-verb”structure.

摘要：The WorM＇s Wife （1999）, written by Carol Ann Duffy, who is the first woman and first openly LGBT person appointed Britain＇s poet Laureate, is a collection of poems which makes full use of intertextuality to show Duffy＇s subversion to patriarchy. In this collection, histories and myths are parodied, quoted, alluded and even rewritten. Women in her poems are given chances to speak out for themselves, which can be seen as a form of resistance against patriarchy. In this article, constitutive intertextuality as well as manifest intertextuality like parody, quotation and allusion in The WorM＇s Wife will be discussed specifically. By analyzing how those intertextual features are adopted as a form of resistance against patriarchy, this article aims to help readers form a better perception of the feminism Duffy raises, and tries to help more women who are being suppressed by men, to find and reconstruct their identities.

摘要：Rubber isolation is the most mature control technology in practical application, and is widely used by short rigid buildings. However, many high isolation buildings have been built around the world in recent years, which do not follow the existing criterions and codes. Many researchers began to research the special problems caused by larger height-width ratio isolation structures. The overturning effect of high height-width ratio structures with rubber bearing is firstly studied. Considering the main factors, such as the height-width ratio of structures, type of site, the designed basic acceleration of ground motion and the decouple factor in horizon, computing experiment is defined with the Uniform Design Method, which is also known as designing isolation structure. The forces of the bearing under edge of structures based on the position of the rubber bearing are calculated. The result indicates that the rubber bearings will lose its functionality under very high tension and compressing force of earthquake motion in horizon and vertical, when the height-width ratio is over a certain value. Thus, based on the calculation result of isolation structures defined in the uniform design method, regression analysis is conducted, and also the rubber edge force regression formula are gotten, which has higher correlation and smaller standard deviation. This formula can be used to roughly calculate whether the pull force occurs at the edge of the building. By the edge bearings of isolation structure minimum force formula, the height-width ratio limited value of the isolation structure is deducted when rubber bearing has minimum force of zero.

摘要：“Melancholy”has been one of the most typical themes in Allan Poe’s literary works,and is also vividly represented in the Poe’s poem of“Ulalume”.This article is going to analyze the“melancholy”in Poe’s“Ulalume”with the three-dimensional narrative approach from poetic sound,form and meaning,and demonstrate how Poe represents the theme of“melancholy”aurally,visually and mentally.

摘要：Control invariant sets play a key role in model predictive *** Lyapunov function,a technique is proposed to design control invariant sets of planar systems in a precise ***,itis designed for a linear system in Brunovsky canonical ***,the result is extended to generallinear ***,the nonlinear control systems are considered,and some sufficient conditionsand design techniques are also *** examples are presented to illustrate the proposeddesign methods.

摘要：This study investigates foreign learners＇ acquisition of the Chinese modal adverb fanzheng on the basis of interlanguage corpus. We find that the sentences written by foreign learners of Chinese （hereafter simplified as FLC） with the wordfanzheng are quite similar to those by Chinese native speakers in the distribution of the syntactic categories, semantic types, semantic functions, pragmatic or discourse functions. These characterize basically the wordfanzheng as one of the modal adverbs in such three aspects as syntax, semantics and pragmatics. Most of the FLCs study the basic meanings and typical contexts of the wordfanzheng at primary stage, and later the functions emphasizing reasons, summary or explaining, and then the function of textual cohesion at the intermediate and advanced stage. The main causes of errors reflect that the FLCs are not able to differentiate the usage offanzheng and that of other causal or adversative conjunctions.

摘要：Modern medicine is increasingly interested in advanced sensors to detect and analyze biochemical *** sensors based on potentiometric methods are a promising platform for monitoring physiological ions in biological *** semi-implantable devices are mainly based on single-parameter *** semi-implantable electrodes for multiparameter sensing have more restrictions on the electrode size due to biocompatibility considerations,but reducing the electrode surface area could potentially limit electrode *** study developed a semi-implantable device system comprising a multiplexed microfilament electrode cluster(MMEC)and a printed circuit board for real-time monitoring of intra-tissue K^(+),Ca^(2+),and Na^(+)*** electrode surface area was less important for the potentiometric sensing mechanism,suggesting the feasibility of using a tiny fiber-like electrode for potentiometric *** MMEC device exhibited a broad linear response(K^(+):2–32 mmol/L;Ca^(2+):0.5–4 mmol/L;Na^(+):10–160 mmol/L),high sensitivity(about 20–45 mV/decade),temporal stability(>2weeks),and good selectivity(>80%)for the above *** vitro detection and in vivo subcutaneous and brain experiment results showed that the MMEC system exhibits good multi-ion monitoring performance in several complex *** work provides a platform for the continuous real-time monitoring of ion fluctuations in different situations and has implications for developing smart sensors to monitor human health.

摘要：With the growing demand and working complexity of corn precision planter,it becomes more important to monitor the working performance through intelligent systems.A new fault monitoring system for corn precision planters was designed and *** system consisted of the information acquisition module,controller module,alarm module,input module and display module.A capacitive sensor was utilized to monitor the seed flow without changing the track of a precision *** system can monitor the whole sowing process of a seed-metering device in *** sowing status,fault type and fault location can be displayed on liquid crystal display(LCD).Warning light on the LCD reminds the operator of abnormal *** tests and field tests showed that the minimum monitoring accuracies of missing sowing and total sowing number were 92.11%and 94.28%,respectively,and the seed level sensor and the opener sensor worked *** system can accurately prompt the seed-metering mechanism in real-time.