摘要：Considering the cosmological constantΛas a thermodynamic pressure and its conjugate quantity as a thermodynamic volume as proposed by Kubiznak and Mann[*** Energy Phys.1207(2012)033],we discuss the critical behavior of charged AdS black hole in arbitrary dimensions *** particular,we present a comparative study in terms of the spacetime dimension d and the displacement of critical points controlling the transition between the small and the large black *** behaviors vary nicely in terms of *** result shows that the equation of state for a charged Reissner–Nordstrom AdS black hole predicts an universal number given by(2d-5)/(4d-8).The three-dimensional solution is also discussed.

摘要：Based on the improved particle swarm optimization(PSO) algorithm,an optimization approach for the cargo oil tank design(COTD) is presented in this *** purpose is to design an optimal overall dimension of the cargo oil tank(COT) under various kinds of constraints in the preliminary design stage.A non-linear programming model is built to simulate the optimization design,in which the requirements and rules for COTD are used as the *** the distance between the inner shell and hull,a fuzzy constraint is used to express the feasibility degree of the double-hull *** terms of the characteristic of COTD,the PSO algorithm is improved to solve this problem.A bivariate extremum strategy is presented to deal with the fuzzy constraint,by which the maximum and minimum cargo capacities are obtained ***,the simulation demonstrates the feasibility and effectiveness of the proposed approach.

摘要：Current procedures for mass-flow hopper design are based on the radial stress theory developed byJenike and involve the determination of the critical outlet dimensions for flow to be initiated. These procedures ignore the surcharge loads on the hopper and involve a study of the passive or arched stress field that exists under flow conditions. An alternative approach as applied to hopper wall load analysis is to employ the horizontal slice method. The arched stress field and horizontal slice methods of analysis are compared. The influence of surcharge loads in the determination of hopper geometry is investigated.

摘要：Although much is known about the benefits of providing creative writing courses to English learners, little research is available on Chinese ethnolinguistic minority learners’ creative writing in formal education. In response, this ethnographic study explored three ethnolinguistic minority learners’ engagement with a three-month elective English creative writing course at a Chinese university. Data(drafts, interviews, and reflection) were analyzed to reveal the three learners’ investment in creative writing and its impact. It was found that creative writing helped the learners to develop more confident writer identities, that they became more proficient in writing, and that their language proficiency also grew. The study suggests creative writing can serve as identity texts,which reflect back on their emergent creative writer identity, and can be a beneficial pedagogical option for ethnolinguistic minority learners.

摘要：The systematical studies of Zr-based BMGs were summarized in terms of their compositional design and their structural characterization. In particular, several key issues of BMG materials were focused, including initial alloy design and subsequent composition optimization, solidification microstructure characterization and crystallization process specification. The results show that a compositional designing approach is successfully developed and, through extensive microstructure characterization using transmission electron microscopy, several new crystalline phases are discovered in these newly developed Zr-based BMG alloys. Crystallization behavior of Zr-based BMG is also determined based on the microstructure analysis.

摘要：This paper investigates the electrical and mechanical behaviors of a single-ASDBD actuator and a two-ASDBD one supplied in sinusoidal mode（1-10 kHz）.The main objective of our research is to determine the optimum frequency values for the function of these actuators with a given power *** this purpose,we determine the electrical power density input to the actuators versus frequency through two methods：i） a semi-theoretical method,based on an impedance calculation,and ii） an experimental method,based on direct electrical *** methods show that the addition of a second ASDBD changes the resonance frequency value of the actuator by moving it towards low *** characterizing the aerodynamic mobile layer structure induced by the single-ASDBD actuator,we analyze experimentally the mechanical response of a two-ASDBD actuator as a function of the inter-ASDBD *** experiments demonstrate that the induced electric wind velocity and the electro-mechanical yield of a twoASDBD actuator reach a maximum value for an optimum inter-ASDBD distance,which is a useful value for the design of highly efficient multi-ASDBD actuators.

摘要：This pilot study documented the occurrence and levels of brominated flame retardants in the tissues of farmed and wild salmon in southern *** of Coho salmon and rainbow trout were obtained from fish farms,rivers and lakes in the Patagonia in Aysen Region,*** samples were analyzed by Gas Chromatography Negative Chemical Ionization Mass Spectrometry for the different polybrominated diphenyl ether（PBDE） *** were observed in all the samples,and the congeners BDE 17,28,47 and 66 were observed in all both farmed and wild *** concentrations were higher in the farmed Coho salmon,presenting significant differences with wild *** levels reached 182 pg/g wet weight（ww） vs.120 *** the case of the rainbow trout,the concentrations were lower,although the congener profile was quite *** levels reached an average of 100 pg/g ww in the farmed fish versus 110 pg/g ww in wild fish,and no significant difference was observed between the *** both species,the congener with the highest concentration was BDE *** on this information,the BDE ？ow was estimated for commerce,which is a form of pollutant transport not usually considered in POP pollution studies.A preliminary estimation indicated that the quantity of PBDEs mobilized by commerce was in the order of kg,and in the case of Chile might reach almost 1 kg.

摘要：The development of a novel polymer-based micro robotic gripper that can be actuated in a fluidic medium is presented in this *** current work is to explore new materials and designs for thermal actuators to achieve micromanipulation of live biological *** used parylene C to encapsulate a metal heater,resulting in effectively a tri-layered thermal *** C is a bio-compatible dielectric polymer that can serve as a barrier to various gases and chemicals. Therefore,it is suitable to serve as a thermal/electrical/chemical isolation material for protecting the metal heater from exposing to an aqueous *** have demonstrated parylene actuators (2mm×100μm×0.5μm)to operate in an aqueous environment using 10 to 80mW input *** temperature of these actuators at full deflection was estimated to be～60℃,which is much lower than the typical requirement of>100℃ to actuate other conventional MEMS *** rerio follicles in fluidic medium were captured successfully using these ***,these actuators were found to be responsive to moderate rise in environmental temperature,and hence,we could vary the fluidic medium temperature to actuate trimorphs on a chip without any input of electrical energy, i.e.,raising the fluidic temperature from 23℃ to 60℃ could actuate the trimorphs to grasp follicles of ～1mm size in *** 60℃,the embryos inside the follicles were observed to be alive,i.e.,they were still moving in the biological fluid isolated by the follicle *** smallest follicles grasped were～500μm in diameter using 800μm×130μm×0.6μm *** fabrication process,modeling, and optimization of the trimorph actuators are *** on the successful operation of these polymer-based actuators,we are currently developing multifinger thermal microgrippers for cellular grasping and manipulation,which can potentially be hybridly integrated with circuits for computer control.

摘要：Single-event transient pulse quenching （Quenching effect） is employed to effectively mitigate WSET （SET pulse width）. It en- hanced along with the increased charge sharing which is norm for future advanced technologies. As technology scales, param- eter variation is another serious issue that significantly affects circuit＇s performance and single-event response. Monte Carlo simulations combined with TCAD （Technology Computer-Aided Design） simulations are conducted on a six-stage inverter chain to identify and quantify the impact of charge sharing and parameter variation on pulse quenching. Studies show that charge sharing induce a wider WSET spread range. The difference of WSET range between no quenching and quenching is smaller in NMOS （N-Channel Metal-Oxide-Semiconductor Field-Effect Transistor） simulation than that in PMOS＇ （P-Channel Met- N-Oxide-Semiconductor Field-Effect Transistor）, so that from parameter variation view, quenching is beneficial in PMOS SET mitigation. The individual parameter analysis indicates that gate oxide thickness （TOXE） and channel length variation （XL） mostly affect SET response of combinational circuits. They bring 14.58% and 19.73% average WSET difference probabilities for no-quenching cases, and 105.56% and 123.32% for quenching cases.

摘要：Nine kinds of structure systems were proposed for the flexible airship according to the inherent structural characteristics. On the basis of equilibrium configuration of the oating airship subjected to the ascent helium buoyancy and gravity,the structural analysis procedure was developed and the computation models were presented for the airship. Then the systematic numerical analysis was carried out for a 25 m long airship,the comparison of principal stress of envelope was performed between the nonlinear numerical analysis result and the engineering elastic theory result. The structural performances were evaluated thoroughly. Finally,the reasonable structural systems were proposed. Accordingly,the results herein were valuable to structural design for flexible airship especially for large flexible airship.