媒体融合已成为我国出版业发展的大势所趋,分析教辅类现代纸书与第三方平台的运作策略与存在的问题,并从内容建设、互动服务、优化体验等方面探讨教辅类现代纸书融合出版的发展策略.

分析ISLI&MPR标准体系底层技术系统的组成部分,针对出版社在数字化建设和数字出版业务中遇到的问题,提出将ISLI&MPR标准体系底层技术系统用于出版社数字资源建设、产品发布等方面,并给出实例.

In order to strengthen cultivating students' engineering ability,the deficiencies of civil engineering mechanics experimental teaching about engineering ability training are summarized as "three aspect of disconnection".That is, disconnection of experiment content and engineering, disconnection of experiment contentand engineering standard, disconnection of single knowledge training and comprehensive knowledge application ability.And "two changes"are proposed to enhance the experimental teaching method.such as, transformation from teacher centered to students centered and from knowledge imparting to engineering ability training.In order to overcome these deficiencies, construction of multi-level experimental course system, comprehensive experiment projects, and diversified experimental teaching method are introduced.And finally reach the target of knowledge-ability integration cultivating.

基于微课的“翻转课堂”教学模式是一种全新的教学理念,能显著提高学生的认知能力与教师的教学水平.目前,我国在“翻转课堂”的设计及衔接上的研究还属空白领域.着重研究微课的特点,构建了“翻转课堂”的教学模式与其实施流程,并进行了基于微课的“翻转课堂”教学模式的实践,为“翻转课堂”教学模式的推广提供借鉴.

This paper constitutes a localization model which is based on that dose rate is inversely proportional to square of distance,proposes and implements a scheme which is based on Wireless Sensor Network(WSN).It introduces the overall system network model,radiation sensors and long-distance wireless communication node design.It gets anchor nodes' locations and radiation values with radiation sensors and GPS sensors to implement radiation localization.Experimental results show that the method system is efficient,and the location accuracy is less than three meters.

Through researching the J2EE-based social security system framework,combined with the specific application in practical software project development,this article proves that by using the reusable framework,system developers can dramatically improve the efficiency of software development and increase software's repetition.It can also strengthen system's flexibility and expandability which is furthermore good for the maintenance and upgrade.This can ease system developers' and maintainer's burden to a great extent.

裁剪算法的核心问题是速度问题,而求裁剪窗口和裁剪对象的交点是影响裁剪速度的主要因素。特别是椭圆对线段的裁剪,由于椭圆的方程是二次的,求椭圆与线段的交点需要求解一元二次方程,涉及开方运算,非常浪费机器时间。为提高裁剪速度,设计出5位的区域编码,利用此技术能够迅速而准确地判断出椭圆和线段的位置关系。对于完全可见或显然完全不可见的线段立即做出保留或弃掉的决定,避免求交运算;对于能够明确断定与椭圆相交的线段,采用中点分割算法求椭圆和线段的近似交点,避免求解一元二次方程和开方运算;对于其他情形的线段通过求解一元二次方程来完成裁剪。基于前述思想设计出的椭圆对线段裁剪算法与现有的同类算法相比,算法实现简单,裁剪速度具有较大提高。

The gear pump motor unity machine is a new hydraulic system which makes the gear pump and the motor into one body,and installs speed control valve between the pump and the moter or designs a variable moter to control the speed of the motor and the rotating direction of the motor.Through changing the shape of intermediate shell to alter the angle change of input shaft and the output shaft.The working principle is introduced and the feasibility of its theory is proved,and theoretical basis is provided for the design and selection of the gear pump motor unity machine.

Double acting pumps have many unique advantages,but its scope of application is limited by the shortage of outflow can't be regulated.We designed a type of the double acting variable vane pump: the superposition and adjusting the relative position of dual valve plate and changing in absorption(outflow) oil window size to achieve their outflow changes.The principle of work is introduced and the feasibility of its theoretical is proved.

对6DOF并联机器人运动行程与速度进行了分析,采用结构化方法对机器人控制过程完成设计,归纳并定义了10个相应函数,实现了机器人控制过程的模块化。将这些函数分别进行编译,生成可执行的命令文件就可完成机器人的控制过程,以减少程序设计的负担。此方法使用VC++仿真并得以验证。

By using the feature that the inverse position solution of 6-DOF industrial parallel robot is easily obtained,we can turn the difficult problem of forward position solution into the result of inverse position solution as the training sample of learning,so as to achieve the non-linear mapping of machine hand from joint variable space to work variable space.Taking a 6-DOF industrial parallel robot as an example,we use BP algorithm to solve its forward solution,and use Matlab to simulate it,the results indicate that the method is of high computational precision and can overcome the disadvantage of numerical method that its accuracy is influenced greatly by the initial value.Through verifying,the solving precision of BP network can meet the requirement of control accuracy.

Applied basic theory of mechanical impedance to analyze cantilever beam.It can obtain the theoretical data of mechanical impedance.Modal analysis is performed by using ANSYS software to obtain free running frequency and mode of vibration of beam.On the basis of modal analysis,dynamic emulation analysis is performed to obtain frequency characteristics and logarithm amplitude frequency characteristic of mechanical impedance and compared with the theoretical data.It is put forward that mechanical impedance of FEA(finite element analysis) is applied to the expansion of application and prospects.

This paper analyzes some problems of existing network storage system and presents a basic architecture for out-of-band virtual network storage system based on Enterprise Volume Management System(EVMS) technology.The client,the internal read and write operation,the online expansion of storage capacity,the load balancing,and the asynchronous metadata update algorithms for this out-of-band virtual storage system are designed and implemented.

For the load balancing problem of cluster system,an improved dynamic load balancing strategy based on feedback is introduced.Combined with periodic feedback theory,the strategy divides update interval into several equal subintervals,and adopts a random mechanism to distribute requests in each subinterval.The model of the process of cluster system is founded based on queuing theory and the formula for calculating the system performance is obtained.Simulation results show that,compared with Aggressive LI strategy,this strategy can attain equivalent performance at the expense of smaller cost,and has small complexity of implementation.

During the past decades,several polynomial algorithms have been developed for the problem of by reciprocal (abbreviated as SRT),which is to find the shortest sequence of reciprocal that transforms one genome into another. However,there are many shortest sequences of reciprocal for most problem instances. In consequence,the problem of finding all the shortest sequences of reciprocal is a natural generalization of SRT. This problem reduces easily to the problem of finding all the sorting reciprocal translocations of one genome with respect to another—that is,all ρ which can reduce the translocation distance of the resulting genome from another after applying ρ on one genome. In this paper,we give an efficient algorithm for finding all the reciprocal translocations. While the new algorithm improves little in asymptotic time complexity,the experimental results show that it performs better in practice than the brute force method.

According to the piezoelectric effect and piezoelectric coupling effect of piezoelectric material,discussed the theoretical fundamental of utilizing electromechanical impedance analysis method to detect mechanical damage,and analyzed the advantage and disadvantage of electromechanical impedance method.Took a test about the crack damage of a beam by the method of impedance measurement,and had some quantitative analysis about the damage using informed damage evaluation method.

At a pace of speeding up operation automation,video surveillance and business information,a new communication network of power system is introduced.The necessity for the use of optical fiber communication is pointed out for the characteristics and requirements of its communications,focused on the structure and principle of EPON,the specific application design model of EPON network communication is given by the actual communication conditions of power system.

An approach to extract teaching feedback information is proposed.The relationship among teaching time allocation,students’answer error rate,error losing point rate and total losing point rate is studied,the corresponding simplified mathematical model is established and it is optimized by improved genetic algorithm.In the genetic algorithm,for the selection,crossover and mutation operators,both operator choice and probability distribution are dynamically adjusted according to the evolution generations.Therefore the convergence speed is improved and probability of searching for the global optimal solution is provided.

In order to enhance students'learning motivation,fully manifest the idea of taking student development as essence ,improve teaching quality,increase teaching effect,and raise the software development talents adapting to the times and social needs,the teaching model——task-driven teaching method,taking task as main line,teacher as leadership and students as main body,is proposed. Task partition and design,class organization,realizing process of task-driven and some problems needing attention in implementing the teaching model,are elaborated. Combining with the experiences of teaching practice,each link of the teaching method is analyzed and summarize.