在研字习书中提升小学生的书法文化素养--以重庆科学城南开景阳小学校为例

汉字和以汉字为载体的中国书法是中华民族的文化瑰宝。重庆科学城南开景阳小学校自2016年开办以来,坚持以研字习书多元书法活动为依托,面向全体学生创设良好的书法学习氛围,以字源研究、书法技能提升、书法文化学习、书法作品欣赏、书法实践活动等书法特色教育,提升小学生书法文化素养。

学校视角下研学旅行有效管理的实践与思考

研学旅行意义重大,学校在具体实施过程中,存在着“游大于学”“只游不学”“重游轻学”等现象,严重偏离了《关于推进中小学生研学旅行的意见》的要求。笔者从学校视角,提出可以从研学旅行前、中、后三个方面着手,以研学任务为主线,赋予研学旅行真正的含义,达到研学旅行真正的目的。

文献考证法和历史比较法——方言韵书研究的“锋利武器”

《六音字典》成书于1515年,是鲜为学界所知而新发现的闽北方言韵书,也可以说是迄今为止所发现的最早的福建方言韵书,反映了数百年前福建闽北政和方言音系。马重奇先生的《明清闽北方言韵书手抄本音系研究》通过通语史与方言史互相结合,传世文献与鲜活方言互相印证,为学界展示了最为可信的文献考证研究法,同时采用历史比较法,真正实现共时（横向）研究和历时（纵向）研究的互补。可以说,文献考证法和历史比较法是方言韵书研究的＂锋利武器＂。

佛典疑难俗字补考

郑贤章所著《汉文佛典疑难俗字汇释与研究》一书中,颇多可商榷者,兹摘取10条,分条论列。

A Numerical Study of Vortex and Precipitating Cloud Merging in Middle Latitudes

We mainly focus on the study of precipitating cloud merging associated with vortex merging. The vortex and precipitating cloud merging are simulated by the cloud resolving model from 0000 21 to 1800 23 July 2003. The results show that the model well simulates vortex circulation associated with precipitating clouds. It is also proven that the vortex merging follows the precipitating cloud merging although vortices show the spatial and temporal differences. The convection vorticity vector is introduced to describe the merging processes. Two merging cases are identified during the 42-h simulation and are studied.

Ultimate Load Capacity and Reinforcement of Circular-Hollow-Section N-Joint

Experimental research and numerical analysis were applied to study the ultimate load capacity(ULC) and reinforcement of circular-hollow-section N-joint.Four specimens were tested under static load.The ULC of each specimen was obtained and the detailed failure conditions were discussed.Based on the results, both welding a plate on the chord member and filling concrete in the chord member are effective to reinforce the N-joint, but it is suggested that these two methods should not be applied simultaneously.Mo...

Digital Chinese Medicine Research: an Overview

Digital Chinese medicine(DCM)is an emerging interdisciplinary field developed from traditional Chinese medicine(TCM)and information science.In this article,we consider the significance and propose an architecture for DCM research,and highlight the key tasks that need to be performed to provide references for the integration of information science into Chinese medicine research.

Nanotechnology:fundamental research to product development

The concept of an integrated "lab on a chip" has long been a goal for the micro-electro-mechanical-systems(MEMS) community.This would entail the integration of not only the sampling and analysis of various functions,but also the ability to transmit this information off the chip to a central repository.This paper describes the initial steps in the fabrication of a "lab on a chip" which would continually analyze blood sampled via microneedles using techniques such as nano plasmonics,specifically,concentrations of glucose.The analysis could then be transmitted off the chip using digital signal processing.This paper describes the analysis and optimization of the microneedle shape and size and the fabrication of the resulting needles in silicon using deep reactive ion etching(DRIE).The paper also describes the opportunities for fabrication of such needles in alternative materials and describes the issues that still have to be overcome before such an integrated device is realized.

High Order Numerical Code for Hyperbolic Mild-slope Equations with Nonlinear Dispersion Relation

Based on the hyperbolic mild-slope equations derived by Copeland (1985), a numerical model is established in unstag- gered grids. A composite 4 th-order Adam-Bashforth-Moulton (ABM) scheme is used to solve the model in the time domain. Terms involving the first order spatial derivatives are differenced to O ( Δx )4accuracy utilizing a five-point formula. The nonlinear dispersion relationship proposed by Kirby and Dalrymple (1986) is used to consider the nonlinear effect. A numerical test is performed upon wave propagating over a typical shoal. The agreement between the numerical and the experimental results validates the present model. Biodistribution and applications are also summarized.

The research and develop on the training mode of the innovative professional photography personnel

Under the background of the Digital Age, This article proposes suggestions on the training mode of the innovative professional photography personnel. We should rest on the good foundations of the demand pattern of ＇Double art talent＇ and take advantage of the advanced special services of Art Design. We should persist in the principle of Artistic Innovation first. We should establish an optimal training scheme of ＇photography creative talents＇ . A highly innovative photography subject system will train talents for ＇Design of photography＇ . We should change our opinions on traditional teaching, and to suggest improvements or comment on the practicability of the innovation and reform of Professional photography.

Numerical Investigation of Two-Phase Flow through a T-Junction Microchannel Reactor

Recently, microreactors have become available to be fabricated and used safely. The performance of these microreactors depends on the behavior of the multiphase flow hydrodynamics. Gas-liquid flow through T-junction microchannel reactor is simulated numerically using VOF （volume of fluid） method. 2-D （Two-dimensional） and 3-D （three-dimensional） models of the T-junction microchannel reactor were introduced to the simulations. Both 2-D and 3-D simulations for nitrogen-water flow were performed in the FLUENT （Fluent. Inc.） computational fluid dynamics package. The third direction effect has been studied by comparing the results of the 2-D and 3-D simulations with the published experimental data. Also, the bubble slug length was calculated for the 2-D and 3-D simulations. Furthermore, the hydrodynamics of the flow was studied for the 2-D and 3-D simulations, and compared with other experimental data. The pressure drop, mean bubble velocity, the velocity distribution and the void fraction were calculated and found to be in good agreement with published data.

The Anthroposophy of Professor Radojcic

In this paper, we present life and scientific work of Dr. Milog Radojcic （1903-1975）, the professor of the University of Belgrade and corresponding member of the Serbian Academy of Science and Arts. In the background of all of Radojcic＇s scientific works were the doctrine of anthroposophy and geometry as its essential part. It led him to, at the time, most contemporary problems in mathematics and mathematical physics. His interest in Medieval art reveals a personality capable to unify by itself artistic and scientific worldview. His published works were digitized in 2008 at the Mathematical Institute of the Serbian Academy of Sciences and Arts and exhibited as a part of the virtual library of the National Center for Digitization. Some of his papers, both published and unpublished ones, are extremly actual and their republishing could be very important not only for scientific but also for general public as well

Key Enabling Techniques and Deployment of 120Gb/s Long-Haul Optical Transmission in Backbone Networks

The explosive increase in data traffic requires networks to provide higher capacity and long-haul transmission capabilities.This paper introduces new results on high-order modulation and efficient Digital Signal Processing algorithms to reduce various transmission limitations in coherent receiving systems.Polarization Division Multiplexed Quadrature Phase Shift Keying(PDM-QPSK)is deployed to reach high bit rates,provides modified digital clock recovery,and allows BER-Aided Constant Modulus Algorithm(BA-CMA)equalising.A Soft Decision-Forward Error Correction(SD-FEC)algorithm and a joint scheme with timing recovery and adaptive equaliser are used to achieve better performance.A compact coherent transceiver is also developed.These techniques have been applied in the largest 100 G Optical Transport Network(OTN)deployment in the world,the backbone expansion project for Phase 3 of the China Education and Research Network(CERNET),with a total transmission length of 10 000 km.

两种教学方法相结合在预防医学实验教学中的应用

实施以问题为基础学习（problem—basedlearning，PBL）教学方法和以讲授为基础学习（1ecture．basedlearning，LBL）教学方法相结合的教学模式，有利于提高学生自主学习能力、综合分析问题能力，有利于培养学生的团队精神；同时，也进一步提高了教师的综合素质。

Experimental and Three-Dimensional Numerical Study on Under-Expanded Impinging Jets

In this paper, under-expanded impinging jets issued from converging circular and rectangular nozzles were investigated. The ratio of the distance between the nozzle exit and the plate L to the diameter D was set at 2, 3, 4 for the circular nozzle and 2, 3 for the rectangular nozzle. Two-dimensional temperature and static pressure distributions on the impinging plate were measured using an infrared camera and a semi-conductor pressure sensor and flow fields were visualized by means of schlieren method. Three-dimensional numerical calculations were also conducted by solving the three-dimensional compressible Euler equations and compared to the experimental results. As a result, it is found that the numerical calculations for the circular and the rectangular nozzles are in good agreement with the experiments. In the experiments, it is found that the stagnation temperature on the plate depends on the pressure in the settling chamber and the distance between the nozzle exit and the plate. The temperature and pressure distributions in the experiments illustrate that even in the case of the circular nozzle, the distributions on the impinging plate are non-axisymmetric, which is confirmed by the three dimensional calculations. The calculation for the rectangular nozzle indicates that two circulating regions occur immediately upstream of the plate.

Contributions of non-tectonic micro-fractures to hydraulic fracturing—A numerical investigation based on FSD model

Shale gas has been discovered in the Upper Triassic Yanchang Formation, Ordos Basin, China. Due to the weak tectonic activities in which the shale plays, core observations indicate abundant random non-tectonic micro- fractures in the producing shales. The non-tectonic micro-fractures are different from tectonic fractures and are characterized by being irregular, curved, discontinuous, and randomly distributed. The role of micro-fractures in hydraulic fracturing for shale gas development is currently poorly understood yet potentially critical. Two-dimensional computational modeling studies have been used in an initial attempt toward understanding how naturally random fractured reservoirs respond during hydraulic fracturing. The aim of the paper is to investigate the effect of random non-tectonic fractures on hydraulic fracturing. The numerical models with random non-tectonic micro-fractures are built by extracting the fractures of rock blocks after repeated heating and cooling, using a digital image process. Simulations were conducted as a function of:(1) the in-situ stress ratio;(2) internal friction angle of random fractures;(3) cohesion of random fractures;(4) operational variables such as injection rate; and(5) variable injection rate technology. A sensitivity study reveals a number of interesting observations resulting from these parameters on the shear stimulation in a natural fracture system. Three types of fracturing networks were observed from the studied simulations, and the results also show that variable injection rate technology is most promising for producing complex fracturing networks. This work strongly links the production technology and geomechanical evaluation. It can aid in the understanding and optimization of hydraulic fracturing simulations in naturally random fractured reservoirs.

Numerical Study of Laminar-turbulent Transition on a Platein a Low-Speed Tunnel with Contoured Wall

Laminar-turbulent transition flow phenomena on a flat plate in a low-speed wind tunnel at different Reynolds numberswere studied numerically. The now calculation is based on an inviscid/boundary layer interaction method with modifiedAbu-Ghannam/Shaw (AGS ) transihon criterion. The test sechon has non- symmetric al contoured walls, and the plate islocated biased the bottom side with a height ratio of 26: 14. In test case of steady flow, a laminar-turbulent transihontakes place and a small separation bubble occurs on the upper side of the plate, when the inlet Reynolds number is assmall as 0.63lx10-6. The predicted transihon location agrees well with that of the test results, but the separation bubbleis hardly to see from the calculatod velocity profiles though the printed data of velocity in this region do show thenegahve values. The further numerical Predictions with different Reynolds numbers corresponding to the incoming flowvelocities show that when the Reynolds number is greater than 1.379xl0-6, the separahon bubble does not occur, whichis coincident with the experimental results. The influence of the side wall geomeny on the transihon on the plate is alsostudied.

Numerical Study on the Suppression of Shock Induced Separation on the Non-Adiabatic Wall

A numerical model is constructed to simulate the interaction of supersonic (M = 2.4 ) oblique shock wave / turbulent boundary layer on a strongly heated wall. The heated wall temperature is two times higher than the adiabatic wall temperature and the shock wave is strong enough to induce boundary layer separation. The turbulence model is Spalart-Allmaras model. The comparison of the wall pressure distribution with the experimental data ensures the validity of this numerical model. The effect of strong wall heating enlarges the separation region upstream and downstream. In order to eliminate the separation, wall bleeding is applied at the shock foot position. As a result of the parametric study, the best position of the bleeding slot is selected. The position of the bleeding is very important for the separation suppression. If the bleeding is applied upstream of shock foot, then separation reoccurs after the bleeding slot. If the bleeding is applied downstream of shock foot, the upstream boundary layer is little influenced and still separated. The bleeding vent width is about same as the upstream boundary layer thickness and suction mass flow is 20 to 80 % of the flow rate in the upstream boundary layer. The bleeding mass flow rate is very sensitive to the bleeding vent position if we fix the vent outlet pressure. The final configuration of the shock reflection pattern approaches to the non-viscous value when wall bleeding is applied at the shock impinging point.

Numerical Study of Spray Dispersion in a Premixing Chamber for Low-NOx Engines

The present work describes a numerical study of a confined two-phase flow under high-pressure conditions, typical of gas turbine combustors. An Eulerian frame was used for the gas phase together with a Lagrangian approach to describe the dispersed phase. The computational method was extended to high-pressure environments, which are more representative of the practical gas turbine operating conditions. The results are compared with experimental data, and revealed the ability of the model to increase the knowledge of the turbulent dispersion phenomena for this type of practical conditions (high pressure and confined flow).

Experimental Observation of Two Phase Flow of R123 Inside a Herringbone Microfin Tube

Vapor-liquid two phase flow behavior of R123 inside herringbone microfin tubes has been studied. Herringbone microfin tube is a kind of internally finned tube in which microfins are installed inside the tube where the microfins form multi-V-shape in flow direction. For the present experiment three different types of herringbone microfin tubes with helix angle B = 8, 14 and 28 are used. Experimental observations showed how flow diverges and converges inside herringbone microfin tube due to fin arrangement. The effect is more remarkable for larger helix angle. From the measurements of the cross-sectional liquid flow rate distribution, the liquid removal and collection and the entrained droplet are discussed. Quantity of liquid droplets is increased with increase of helix angle. The tube with helix angle B = 28 shows higher quantity of liquid droplets than others.