单元双线架构下语文教学策略——以部编版语文四年级下册《天窗》教学为例

本文以部编版语文四年级下册《天窗》教学为例,论述单元双线架构下语文教学的策略:放飞想象,透过文字感悟情感变化;联系生活,透过文本体会情感内蕴;文本重构,关注表达的内在逻辑;单元整合,聚焦文字的迁移运用。

应用软件产品线工程开发空调控制器软件

空调控制器软件需要缩短开发时间以满足市场和订单需要。其具有很多的共性时也带有差异性,软件产品线工程特别适合这种场景。本文将软件产品线工程方法用于空调控制器软件开发,提出了基于Nested SPL产品线架构、参考架构;基于领域驱动设计提供了一种高效使用已有代码资产生成核心资产库的方法。最后描述了应用结果。明显提升了产品研发效率和质量。

企业绿色运营的梯度发展模式初探

科学发展观要求企业探索一条可持续发展的新路,形成节约型增长方式。企业绿色运营的梯度发展模式为其提供了初步的理论构想。企业绿色运营是一个系统工程,它包含三大基本梯度:基于废弃物企业内流动的绿色生产链、基于副产品区域内流动的生态工业链、基于主产品跨区域流动的绿色供应链。绿色运营的梯度发展模式要求企业对资源进行梯级循环利用,完成三大梯度的构建及跨越升级,最终实现绿色生产链、生态工业链、绿色供应链相结合的线环架构运营模式。

基于MasterCAM 2D刀路的加工中心编程

基于MasterCAM曲面编程的智能化水平已达到相当高的程度,合理运用MasterCAM软件2D或2D线架构的数控编程功能,不但能大大减轻编程工程师的工作量,降低工作强度,而且能在较短的工作时间内编写出高质量的加工程式,缩短工件的加工时间,提高数控设备使用率,同时也能提升加工工件的表面光洁度。

基于MastercanX9的2D高速刀路的研究

基于MastercanX9的编程智能化水平己达到相当高的程度。合理运用MastercanX9软件2D高速刀路数控加工功能,不但能大大减轻编程工程师的工作量,降低工作强度,而且能在较短的工作时间内编写出高质量的加工程式,缩短工件的加工时间,提高数控设备使用率,同时提升加工工件的表面光洁度。笔者通过对MastercanX9的2D高速刀路的各种加工技术的分析,进一步说明基于MastercanX9的2D高速刀路加工技术研究的先进性及其研究的意义。

流淌的叙事:浸没式戏剧故事性空间导向

浸没式戏剧的出现是对传统叙事“第四面墙”的一次颠覆,参演的界限不再囿于一方舞台,文本的结构与重置更使得观赏者的能动性大大提升,不仅仅是剧情的被动旁观,更可以在不同的故事线之间穿梭并行,从而把零散的叙事片段通过空间导向去拼接形成不同的故事线。区别于线性叙事,使得多核心角色牵引故事发展成为可能。本文将以沉浸式戏剧《不眠之夜》以及国产沉浸式戏剧代表作《死水边上的美人鱼》为例,分析浸没式戏剧中故事性的空间导向。

Design of IP core based on AMBA bus

With the rapid development of integrated circuit(IC)technology,reusable intelligent property(IP)core design is widely valued by the industry.Based on the in-depth study of the functional characteristics of advanced microcontroller bus architecture(AMBA),a design scheme of IP core is presented,and it is divided into the functional modules,and the structural design of the IP core is completed.The relationship between the internal modules of the IP core is clarified,and the top-down design method is used to build the internal architecture of the IP core.The IP core interface module,register module,baud rate module,transmit module,receive module,and interrupt module are designed in detail by using Verilog language.The simulation results show that the designed IP core supports serial peripheral interface(SPI)protocol,the function coverage of IP core reaches 100%,the maximum working frequency reaches 200 MHz,and the resource occupancy rate is less than 15%.The reusable IP core can support multiple data formats,multiple timing transmission modes,and master/slave operation modes,reducing the resource consumption of hardware circuits and having stronger applicability.

Applications of IoT in Smart Grid

In this paper,the basic requirements of the smart grid in China are studied.By applying Internet of Things(IoT) technologies,various intelligent services can be created.The development of the smart grid would rely heavily on the application of IoT.The three-layer architecture of IoT for the smart grid in China is introduced.Various information and communication technologies of IoT applied to smart grid are discussed.Particularly,several typical IoT application solutions such as power transmission line monitoring,smart patrol,smart home and electric vehicle management,are provided.

Offloading Mobile Data from Cellular Networks Through Peer-to-Peer WiFi Communication:A Subscribe-and-Send Architecture

Currently cellular networks do not have sufficient capacity to accommodate the exponential growth of mobile data requirements.Data can be delivered between mobile terminals through peer-to-peer WiFi communications(e.g.WiFi direct),but contacts between mobile terminals are frequently disrupted because of the user mobility.In this paper,we propose a Subscribe-and-Send architecture and an opportunistic forwarding protocol for it called HPRO.Under Subscribe-and-Send,a user subscribes contents on the Content Service Provider(CSP) but does not download the subscribed contents.Some users who have these contents deliver them to the subscribers through WiFi opportunistic peer-to-peer communications.Numerical simulations provide a robust evaluation of the forwarding performance and the traffic offloading performance of Subscribe-and-Send and HPRO.

Verified Solution for a Statically Determinate Truss Structure with Uncertain Node Locations

We consider a statically determinate structural truss problem where all of the physical model parameters are uncertain： not just the material values and applied loads, but also the positions of the nodes are assumed to be inexact but bounded and are represented by intervals. Such uncertainty may typically arise from imprecision during the process of manufacturing or construction, or round-off errors. In this case the application of the finite element method results in a system of linear equations with numerous interval parameters which cannot be solved conventionally. Applying a suitable variable substitution, an iteration method for the solution of a parametric system of linear equations is firstly employed to obtain initial bounds on the node displacements. Thereafter, an interval tightening （pruning） technique is applied, firstly on the element forces and secondly on the node displacements, in order to obtain tight guaranteed enclosures for the interval solutions for the forces and displacements.

Clustering Approaches for Overhead Reduction over Coordinated Multiple Points Network-MIMO Downlink Systems

Owing to the potential for intercell cochannel interference mitigation and significant spectral efficiency improvement, coordinating transmission techniques by multiple radio access points have recently attracted a lot of attention. In this paper, the system structure and mathematical signal model based on clustered structure are presented for multipoint coordinating downlink transmission, the clustered supercell configurations with static/dynamic approaches are discussed, and then optimal precod- ing design is provided for an accepted level of scheduling complexity and reduced signaling over- head. Some simulation results are given to evaluate the performance of different cell-clustering approaches, and to show that a clustered supercell size of 7 is a reasonable choice for clustered coordination with the given transmit power and the reduced feedback.

Research on BP-ANN Model of Semi-rigid Connection

The beam-to-column semirigid connection in a steel frame structure is represented by a zero-length rotational spring at the end of the beam element. The beam-to-column semirigid connection behavior is represented by its moment-rotation relationship. Several traditional mathematical models have been proposed to fit the moment-rotation curves from the experimental database,but they may be more reliable within certain ranges. In this paper, the intellectualized analytical model is proposed in the semirigid connections for top and seat angles with double web angles using the feed-forward back-propagation artificial neural network （BP-ANN） technique. the intellectualized analytical model from experimental results based on BP-ANN is more reliable and it is a better choice to the moment-rotation curves for beam-to-column semirigid connection. The results are found to provide effectiveness to the experimental response that is satisfactory for use in steel structural engineering design.

A novel symmetric 10 Gbit/s architecture with a single feeder fiber for WDM-PON based on chirp-managed laser

We propose the single feeder fiber architecture for wavelength division multiplexing passive optical network(WDM-PON)based on directly modulated chirp managed laser(CML).The downlink(DL)signal output from the laser is converted to return-to-zero(RZ)differential phase shift signal using a pulse carver.The downstream signal is reused as a carrier for the upstream using intensity modulation technique.Simulation results show the error-free performance at symmetric data rate of 10 Gbit/s per channel with negligible power penalty and improved receiver sensitivity for the uplink(UL),over 25 km standard single-mode fiber(SSMF).A low-cost and reduced circuitry network design is implemented on a single feeder fiber with the elimination of differential encoder and one external modulator.

Recommendations for construction of a nonlinear international Terrestrial Reference Frame

The problems of ITRF2008,the latest International Terrestrial Reference Frame,are pointed out and analyzed as follows:(1) ITRF is not a mm-level Terrestrial Reference Frame;(2) the origin of ITRF is neither the Earth's center of mass (CM) nor the center of figure (CF);(3) the scale of ITRF is not a uniform system in the sense of the gravitational theory of relativity.These problems result from the linear hypothesis used in the establishment and maintenance of ITRF,which includes the linear hypothesis of the coordinates definition of the ITRF reference stations,and the seven coordinate transformation parameters (three translation parameters,three rotation parameters,and one scale parameter) when the ITRF combine solution is constructed.The linear hypothesis of the ITRF construction leads to the current terrestrial reference frame only at the cm-level,which cannot satisfy the requirements of monitoring mm-level crust movements as well as the global environment.This article points out that the construction of a mm-level Terrestrial Reference Frame is actually a leap from linear to nonlinear.Therefore,according to the main characteristics of nonlinear changes of the crust's deformation,the geocenter motion and the overall height fluctuation of the Earth,the new ITRF station coordinates definition and the new observation equations of combined solutions are constructed for the realization of a mm-level nonlinear ITRF,which can solve the problems of the current ITRF.

新一代防火墙技术探索

近年来,网络病毒、黑客攻击肆虐,网络系统的安全性受到严重的威胁,而当前的防火墙技术已明显落后于安全形势的需要,而一些较先进的防火墙技术又为国外一些企业所垄断。本文从市场需求出发,对传统的防火墙的工作原理和存在的不足作了一定程度的剖析,并从技术层面对新一代防火墙的工作原理及应达到的技术要求作了一定的阐述。

Hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays as superior electrodes for lithium-ion microbatteries

This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show impressive performance as a high-capacity anode for lithium-ion batteries. The key design in this study is a core-branch hybrid architecture, which not only provides large surface active sites for lithium ion insertion/extraction, but also enables fast charge transport owing to the reduced diffusion paths for both electrons and lithium ions. The peculiar combination of attributes of TiO2 （good structural stability） and Fe2O3 （large specific capacity） provides the hybrid array electrodes with several desirable electrochemical features： large reversible capacity （-800 mA.h.g^-1 for specific mass capacity and -750 μA.h-cm^-2 for specific areal＂ capacity）, good cycling stability, and high rate capability. The impressive electrochemical performance, together with the facile synthesis procedure, may provide an efficient platform to integrate the TiO2 nanowire@Fe2O3 nanothorn core-branch arrays as a three-dimensional thin film electrode for lithium-ion microbatteries.