软件工程需求分析方案的制定研究

文章针对软件工程需求分析的必要性进行阐述,并结合软件工程需求分析中常见的问题对软件工程需求的方案制定进行了剖析和研究,以促进软件工程开发的成功。

工业企业劳动定额的分析与制定

劳动定额是任何一个工业企业发展过程中都不可缺少的重要内容,其是企业管理的重要组成部分。劳动定额的产生受到企业的技术、生产以及组织条件等的影响,从工业角度来讲,劳动定额就是一种对劳动者劳动消耗量进行限制的标准化要求。也正是因此,其对企业的发展有着重要的作用,为了在激烈竞争的现代化经济中,推动工业企业的可持续发展,我们要以科学的方法来分析劳动定额标准,制定合理的劳动定额。

高职《市场分析与营销战略方案制定》课程标准开发研究

文中分析了高职《市场分析与营销战略方案制定》课程的性质与作用、教学目标,提出了相匹配的教学内容和要求,最后还提供了教学实施建议与课程考核及教学资源等,为高职院校市场营销专业核心课程教学走向规范化奠定了基础。

高职《市场分析与营销战略方案制定》课程诊改初探

教育部办公厅颁发了《关于建立职业院校教学工作诊断与改进制度的通知》后,教学诊改工作在各职业院校有序的开展起来,笔者所在的学校也根据教育部要求全面进行了教学诊改。笔者将从课程建设计划、课程内容、课程资源、课程教学、课程教学团队五个方面出发,初步探索《市场分析与营销战略方案制定》课程的诊改分析。

一种混合智能的作战推演应用模式研究

作战推演技术在指挥训练、作战指挥、战法研究等领域中有着广泛的应用。传统的作战推演技术过于依赖与人在环路,推演效率低下,难以覆盖真实对抗中的各种可能情况。近年来广泛研究的深度强化学习技术,只能扮演战术级以下的智能蓝军用于模拟训练,因为其即不能胜任战役级决策的复杂度,也无法融入红队指挥官的智慧。于是提出一种混合智能的作战推演应用模式,同时融入人的智慧和深度强化学习训练的智能模型,用于态势演变预测和复盘分析、方案推演评估和探索优化。结合典型应用场景开展了实例化研究与概念验证,具有一定参考价值。

从新课程标准探析生物学课堂教学目标的制定

阐述了课堂教学目标是一节课的总体框架,有决定全局作用。教师在进行教学设计时,应该清楚课堂教学目标到底是什么,制定教学目标的依据是什么？如何制定有效的教学目标。

XN9000全自动血细胞分析仪显微镜复检规则的制定及分析

目的:探究Sysmex XN9000全自动血细胞分析仪显微镜复检规则的制定与应用效果。方法:选取2020年2月采集的门诊及住院患者静脉血乙二胺四乙酸二钾(EDTA-K2)抗凝标本(n=200例)为研究对象,对血细胞分析仪和显微镜的检查结果进行分析。结果:在200份标本中,采用Sysmex XN9000全自动细胞分析仪检验,镜检标准不相符的阴性标本171例(85.50%),符合镜检标准的阳性标本29例(14.50%),且在29例符合镜检标准的阳性标本中共触犯39次本科室制定的复检规则。结论:Sysmex XN9000自动血细胞分析仪复检规则准确性良好,以显微镜进行复检验证,其与国家复检标准相符,符合临床血细胞的检验质量要求。

面向实践,基于实证——美国国家早期教育研究中心评述

美国国家早期教育研究中心(The National Institute for Early Education Research,简称NIEER))成立于2002年,主要关注早期教育发展,通过开展和传播基于实证的学术研究和政策分析来支持早期教育的卓越与公平发展。成立15年来,研究中心的研究脉络发生了转变,从侧重基础研究到侧重对策研究,从侧重宏观政策分析到将政策分析与开展早期教育项目相结合,从关注早期教育个别问题到关注全方位问题。《美国国家早期教育年鉴》的出版与发行、早期学习成果提高中心(the Work of Center on Enhancing Early Learning Outcomes,CEELO)的工作、早期教育质量评估与政策评估、国际研究、STEM教育等问题是研究中心近期的研究重点。在发展过程中,研究中心形成了以下研究特色与优势:独立的研究立场与研究过程,基于科学与证据的专业政策分析与制定,拥有独立开发的研究测评工具与数据信息系统以及敏锐高效的政策反应能力。研究中心的发展路径与研究脉络对我国新型教育智库特别是高校教育智库的发展模式具有一定的参考和借鉴价值。

Active Vibration Control and Stability Analysis of Cantilever Plate

Active vibration control and stability analysis of cantilever plate are discussed. Based on the analysis of characteristic equation of the closed loop control system, it is shown that such an active control may increase damping properties of the system, meanwhile it may result in instability of the system. It is stable when the feedback only occurs between the collocated sensors and actuators, but it may be unstable when there exists the feedback between sensors and actuators, which mainly depends on the property of the gain matrix of feedback. If the gain matrix is symmetric and definitely positive, the system is stable.

Stability of Three-Dimensional Trunk Motion

Aim To analyse stability of the three-dimensional rotational movements of a human torso system under perturbations using anatomical data of muscles (McGill, 1992). Methods To use the linearized analysis methods and a special model in which the effect of ligamentous and passive resitance by discs and fibers is included. Results The model is capable of predicting the muscle forces,and joint reaction forces at the L5/Sl which are the biomechani- cal factors used to asses the risk of the discs and annulus fibers. Conclusions It can also be used to analyze and neural excitation levels for a diverse Set of trunk movement.

战略目标与管控对企业的重要性

如何在实现发展战略的同时兼顾财务风险的控制是所有企业面临的急需解决的问题,有不少的公司和学者都在探索其中的道路。本文以宇通公司为例,分析其优点和不足,以期对当前的公司面临的战略发展及财务管理提供一些切实的帮助。

Classifying and ranking DMUs in interval DEA

During efficiency evaluating by DEA, the inputs and outputs of DMUs may be intervals because of insufficient information or measure error. For this reason, interval DEA is proposed. To make the efficiency scores more discriminative, this paper builds an Interval Modified DEA (IMDEA) model based on MDEA. Furthermore, models of obtaining upper and lower bounds of the efficiency scores for each DMU are set up. Based on this, the DMUs are classified into three types. Next, a new order relation between intervals which can express the DM’s preference to the three types is proposed. As a result, a full and more convictive ranking is made on all the DMUs. Finally an example is given.

Frequency domain stability criteria for fractional-order control systems

This paper concerns about the frequency domain stability criteria for fractional-order control systems. On the base of characteristics of the fractional-order equations solutions, we consider the Nyquist stability criterion in a wider sense and obtain a more common means to analyze the stability of fractional-order systems conveniently. Finally, this paper illustrates the generalized stability criteria with an example to show the effect of the parameters variation on the fractional-order control systems.

高层建筑灭火救援预案制定方法分析

随着社会的不断发展,城市建设的速度和质量在不断的提高,高层建筑现在成为城市建设的主要建筑,无论是在居民居住社区,以及商业用区都可以看到高层建筑的存在。高层建筑给人们带来了诸多的便利,但是也给人们带来了一定的困扰。比如说高层建筑的防火安全问题就是消防部门一直的大难题,不仅我国如此,对于世界上大多数国家来说,高层建筑的消防安全问题一直都是十分棘手的一个难题。高层建筑灭火救援预案在消防安全中处于基础性地位。高层建筑灭火救援预案在实际的消防灭火中也发挥了一定的作用,但是也的确在一些方面存在一些问题。下面是我对这一问题的简单看法和研究,希望可以起到抛砖引玉的作用。

Stability control of underground construction

This paper presents the reason for instability of underground construction. In order to know failure mechanism during the whole construction process, a research framework of multi-scale based on experiments and numerical analysis is established. Some promising aspects in the topics of stability control are also given in the paper.

Design of novel sliding-mode controller for high-velocity AUV with consideration of residual dead load

This work focuses on motion control of high-velocity autonomous underwater vehicle(AUV).Conventional methods are effective solutions to motion control of low-and-medium-velocity AUV.Usually not taken into consideration in the control model,the residual dead load and damping force which vary with the AUV’s velocity tend to result in difficulties in motion control or even failure in convergence in the case of high-velocity movement.With full consideration given to the influence of residual dead load and changing damping force upon AUV motion control,a novel sliding-mode controller(SMC)is proposed in this work.The stability analysis of the proposed controller is carried out on the basis of Lyapunov function.The sea trials results proved the superiority of the sliding-mode controller over sigmoid-function-based controller(SFC).The novel controller demonstrated its effectiveness by achieving admirable control results in the case of high-velocity movement.

Stability analysis and stabilization of wireless networked control systems based on deadband control scheduling

The stability analysis and stabilization problems of the wireless networked control systems(WNCSs) with signal transmission deadbands were considered. The deadbands were respectively set up at the sensor to the controller and the controller to the actor sides in the WNCS, which were used to reduce data transmission, furthermore, to decrease the network collision and node energy consumption. Under the consideration of time-varying delays and signal transmission deadbands, the model for the WNCS was presented. A novel Lyapunov functional which took full advantages of the network factors was exploited. Meanwhile, new stability analysis and stabilization conditions for the WNCS were proposed, which described the relationship of the delay bounds, the transmission deadband bounds and the system stability. Two examples were used to demonstrate the effectiveness of the proposed methods. The results show that the proposed approach can guarantee asymptotical stability of the system and reduce the data transmission effectively.

Identification of differentially expressed long non-coding RNAs in human ovarian cancer cells with different metastatic potentials

Objective： To identify differentially expressed long non-coding RNAs （lncRNAs） involved in the metastasis of epithelial ovarian cancer. Methods： An in vitro invasion assay was performed to validate the invasive capability of SKOV3 and SKOV3.ip1 cell lines. Total R.NA was then extracted, and microarray analysis was performed. Moreover, nine lncRNAs were selected for validation using RT-qPCR. Results： Compared with the SKOV3 cells, the SKOV3.ip1 cells significantly improved in the in vitro invasive activity. Of the 4,956 lncRNAs detected in the microarra~ 583 and 578 lncRNAs were upregulated and downregulated, respectivel~ in SKOV3.ip1 cells, compared with the parental SKOV3 cells. Seven of the analyzed lncRNAs （MALAT1, H19, UCA1, CCAT1, LOC645249, LOC100128881, and LOC100292680） confirmed the deregulation found by microarray analysis. Conclusion： LncRNAs clusters were differentially expressed in ovarian cancer cells with varying metastatic potentials. This result indicates that some lncRNAs might exert a partial or key role in epithelial ovarian cancer metastasis. Further studies should be conducted to determine the roles of these lncRNAs in ovarian cancer metastasis.

Prediction Model of Data Envelopment Analysis with Undesirable Outputs

Data envelopment analysis (DEA) has become a standard non parametric approach to productivity analysis, especially to relative efficiency analysis of decision making units (DMUs). Extended to the prediction field, it can solve the prediction problem with multiple inputs and outputs which can not be solved easily by the regression analysis method.But the traditional DEA models can not solve the problem with undesirable outputs,so in this paper the inherent relationship between goal programming and the DEA method based on the relationship between multiple goal programming and goal programming is explored,and a mixed DEA model which can make all factors of inputs and undesirable outputs decrease in different proportions is built.And at the same time,all the factors of desirable outputs increase in different proportions.