Building Information Modeling-Based Secondary Development System for 3D Modeling of Underground Pipelines

Underground pipeline networks constitute a major component of urban infrastructure,and thus,it is imperative to have an efficient mechanism to manage them.This study introduces a secondary development system to efficiently model underground pipeline networks,using the building information modeling(BIM)-based software Revit.The system comprises separate pipe point and tubulation models.Using a Revit application programming interface(API),the spatial position and attribute data of the pipe points are extracted from a pipeline database,and the corresponding tubulation data are extracted from a tubulation database.Using the Family class in Revit API,the cluster in the self-built library of pipe point is inserted into the spatial location and the attribute data is added;in the same way,all pipeline instances in the pipeline system are created.The extension and localization of the model accelerated the modeling speed.The system was then used in a real construction project.The expansion of the model database and rapid modeling made the application of BIM technology in three-dimensional visualization of underground pipeline networks more convenient.Furthermore,it has applications in pipeline engineering construction and management.

Effects of Plant Secondary Metabolite Nicotine on Growth and Development of Frankliniella occidentalis

[Objective] The paper was to explore the chemical and molecular mechanisms of Frankliniella occidentalis, an important quarantine pest, against toxic substances. [Method] F. occidentalis were evaluated after continuous exposure to artificial diets containing nicotine from the 2^（nd） and the 3^（rd）instars for five generations, to determine the larval weight, pupal weight, and larval development duration. [Result] The larval development delayed and nicotine treatment significantly inhibited the weight gain of larvae. Compared to the control, the inhibition rates of larval weight and pupal weight were declined from 45% to 20% and from 25% to 4% respectively after feeding the 2^（nd）instars with nicotine for five generations.Nicotine delayed the larval growth and prolonged the generation duration of F. occidentalis. Nicotine showed more significant inhibitory effect on the lower instar larvae. With the increasing generations of secondary culture, the inhibitory effect of nicotine on larval weight and pupal weight was weakened. The developmental period of larvae was shortened, and the generation duration of F. occidentalis was shortened. [Conclusion] Nicotine affects the growth and development of F. occidentalis. F. occidentalis will gradually increase the adaptability to nicotine toxic substances after selfregulation for a few generations, and relieve the inhibitory effect of toxic substances.

Virtual Reality and Visual Simulation Technology in Platform Construction with Four Bucket Foundations Based on Secondary Development of Vega

The platform with bucket foundations can penetrate and migrate by underpressure/positive pressure technique caused by pumping water out/in the bucket. However, the construction process of bucket foundations cannot be clearly observed and effectively controlled due to the special nature of sea environment. By using an advanced simulation development tool of Multigen Creator, the visual construction simulation program for the platform with bucket foundations was developed to set up the virtual reality system with interaction control and observation in every view angle based on the secondary development technology of Vega platform. The application results show that the method is feasible and effective by simulating the whole construction process for the platform with four bucket foundations.

Simulation Analysis Module of High-speed Rail Bearings Based on Secondary Development in ADAMS

This paper develops a strong secondary development based on ADAMS feature which creates high-speed rail bearings for simulation analysis module. This thesis is in the case of non-circular pattern instructions of how to achieve rapid roller modeling, with analysis of functions and parameters required for the design of the simulation module of the high-speed rail bearing, as well as the design of dialog boxes, the environment and file structure. The specific modules is based on the secondary development language provided by ADAMS ! View. Through the menus, dialog boxes which input parameters, it can achieve high iron bearing automatic modeling, dynamic analysis and post-processing to simplify the analysis of high-speed rail bearing operations, as well as improving the high-speed rail bearing development efficiency.

Teacher Professionalism and Professional Development of Chinese Secondary Teachers

The paper refers to some classic texts on professionalism/professionalization which offer a spectrum of different interpretations and shed light on the possible confusion of the terms,with critique on the classic functionalist claims and the emergence of new professionalism.The paper illustrates the history of Chinese secondary teachers over the last few decades,and tries to examine the implications of western conception of teacher professionalism and the professional development of Chinese secondary teachers.With the current trend toward globalization,Chinese teachers professionalism will take on a look of global professionalism(dominated by western professionalism),while with China's own context playing a role in its development.

Research on the Professional Development Mode of Primary and Secondary School English Teachers

In this paper, we conduct research on the professional development mode of primary and the secondary school English teachers. Teacher training is an effective way to promote the teachers’ professional development that is an important content of teacher education, and teachers’ pre-service training, entry education together constitute a complete content of teacher education, teacher training, of course and is also the need of teachers’ lifelong learning, for the national government attached great importance to teachers’ training work. English teaching is a kind of creative and complicated work, and whole teaching activity involves teachers, students, teaching objective and the teaching content, teaching means and teaching links such as basic elements. This paper proposes the novel perspective of the professional development mode for teachers that will be meaningful.

A Study on the Professional Development Strategies of English Teachers in Rural Primary and Secondary Schools

In the new round of development, the government should not only focus on the development of large enterprises, but also on small enterprises that can grow explosively. According to the growth characteristics of unicorn enterprises, the "Guidelines for the Cultivation of High-Growth Enterprises" should be formulated at the provincial level. On the basis of the clear definition of highgrowth enterprises, the classification criteria are defined. A set of government support mechanisms for enterprise selection, approval and support should be established. In addition, a set of positive support policies should be adopted for different types of enterprises in land use, financing, taxation, technology, talent recruitment and other aspects.

Development of EFL Students' Writing in Secondary Education

The aim of this paper is to explore and measure language learners'performance in L2 writing production using the complexity,accuracy,and fluency constructs.A total of 123 secondary education students took part in the study.Results are manifold.In the first place,they show that the measures of fluency,accuracy,grammatical and lexical complexity progress in a significant way:fourth grade students outperform first graders in the aforementioned measures.Secondly,fewer correlations between the writing measures used and the general quality of the compositions are found among the older students than among the younger ones,indicating that the correlations change depending on learners'age.Thirdly,1st year students exhibit a higher ratio of errors,both in general and also by error category,although only two types decrease significantly in 4th year students:syntactic and spelling errors.Lastly,we find that errors tend to develop in a non-linear way.

The Composition and Promotion Strategy of Teachers'Curriculum Development Ability in Secondary Vocational Schools

The curriculum development ability of secondary vocational school teachers is a necessary professional ability for teachers.It has important practical significance and practical value for promoting secondary vocational education curriculum and teaching reform.On the basis of analyzing the connotation and composition of curriculum development ability of teachers in secondary vocational schools,this article proposes three strategies to improve the curriculum development ability of teachers in secondary vocational schools.

The Way of the Novice English Teachers＇ Professional Development in Secondary School

In the modern times, the professional development of teachers is a hot topic among the educational world. Facilitating the professional development of teachers is one of a most important way to improve the teachers＇ personalities. However, how to facilitate the professional development of the novice English teacher in the secondary school is still a big and headache problem in front of all education managers and all novice English teachers. For this reason, it has a huge practical significance to look for some ways to research the professional development of the novice English teachers in secondary school. The objective of this research is to promote the professional development of novice English teachers in secondary school through a wide range of ways. It also aims to promote the whole personalities of all English teachers and the whole English teaching qualities. This paper wiU research in how to promote and facilitate the professional development of the novice English teachers in secondary school from the parts of country, school and teachers. Specificly speaking, from the perspective of country, it contains the way of some short trains for novice teachers from superior educational department and some educational action research; From the perspective of the secondary school, it includes school-based in-service training, the exploitation of school-based curriculum and learning team; From the perspective of teacher themselves, it includes teaching reflection, observing other teachers＇ class and using micro-teaching to promote teachers＇ teaching skills.

Research on the evaluation index system of development work of the transformation of the secondary school of newly-built local undergraduate colleges and universities in our country

The newly-built local undergraduate colleges and universities positively respond to the call of national policy and successively joined the rank of transition to the application of technology-based development of university, in order to seek their own development path. Whether the transformation development work of secondary college can succeed or not directly decide whether the transformation work of the whole college can carry on smoothly or not. This essay, by establishing eighteen secondary indicators, investigates seven aspects of the newly-built local undergraduate colleges and universities secondary college transformation work, such as the general idea, specialty construction, talents training mode, teaching staff construction, integration of production with teaching, social services and quality assurance, hoping that it can play a reference to the work of other colleges and universities.

Rapid Modeling of an Excavator Working Device Based on the Secondary Development of Pro/E

In order to shorten the design cycle of the excavator working device, we have proposed a rapid modeling method for the excavator working device which uses parameters. Based on the Pro/toolkit, which is secondary development tool of Pro/E4.0,and combined with Vs C＋＋2005 programming software. It developed a flexible set of MFC visualization-friendly interfaces. Users can enter data in the visual interface according to their needs and it will generate a new part model quickly. So it improves the design quality, shortens the design cycle, and makes the cost lower significantly.

Revisiting Sustainable Development of Dry Valleys in Hengduan Mountains Region

Dry valleys are a striking geographic landscape in Hengduan Mountains Region and are characterized by low rainfall, desert type of vegetation and fragile environment. Past efforts and resources have been concentrated mainly on rehabilitation of degraded ecosystem and fragile environment, particularly reforestation, while socio-economic development has been largely overlooked. Despite successes in pocket areas, the overall trend of unsustainability and environmental deterioration are continuing. It is important to understand that uplift of the Tibetan Plateau is the root cause of development of dry valleys, and development and formation of dry valleys is a natural process. Human intervention has played a secondary role in development of dry valleys and degradation of dry valleys though human intervention in many cases has speeded up environmental degradation of the dry valleys. It is important to understand that dry valleys are climatic enclaves and an integrated approach that combines rehabilitation of degraded ecosystems and socio-economic development should be adopted if the overall goal of sustainable development of dry valleys is to be achieved. Promotion of niche-based cash crops, rural energy including hydropower, solar energy, biogas and fuelwood plantation is recommended as the priority activities.

Development and application of geochemical data processing system based on fractal theory

GC-GIS system is a geochemical data processing system based on fractal theory. The system realized quantity statistics function by calling Surfer and MapInfo software, and it is compiled with Visual Basic language. This system is designed to integrate the functions both quantity statistics of Surfer and spatial data management of MapInfo. A new algorithm of fractal is added up to GC-GIS. Taking example for Weichang region of Hebei to test the system, the processing results show that the model can match the real distribution of mine well.

UG Programming Development and Digital Design of Globoidal Indexing CAM Mechanism

In the design process of globoidal CAM mechanism,there are some shortcomings such as long structure design cycle,low efficiency,and no modification flexibility of parameters of similar parts.NX Open classic application programming interfaces(APIS)can be connected with Microsoft Visual Studio(VS).Based on NX Open application,users can develop menus,toolbars,dialog boxes and other tools to realize interactive design.Users can also call input parameters through the dialog box callback function,then activate the corresponding control application(callback function)by C++programming language and NX Open API complete code.Based on the secondary development function of UG software and VS,a digital design system suitable for high efficiency modeling of globoidal indexing CAM mechanism was developed to complete the human-machine interface interaction design.The results show that comparing the digital design system with the traditional design,the system after parametric design can not only greatly shorten the design time,but also reduce the tedious repetitive work,which proves the superiority and feasibility of the digital design.

岩石蠕变模型的二次开发

岩石的非线性蠕变本构模型的二次开发是研究岩石非线性蠕变的重点。本文对前人建立的本构模型进行三维差分公式推导,将三维公式写入FLAC^(3D)软件,进行本构模型的二次开发;对比分析数值模拟和试验数据的拟合程度,验证模型的正确性。

我国中小学师德问责政策的演进逻辑与理性选择

中小学师德问责政策的日臻完善是提高中小学教师师德修养的必经之路,对促进中小学生的和谐健康发展具有深远意义。通过梳理改革开放以来有关中小学师德问责的相关政策,发现我国师德问责政策经历了初步创立时期、寻觅探索时期、发展深入时期和日渐成熟时期四个阶段。其演进呈现出以改变师德困境为目的的动力机制、以多种渠道保障政策落实、以教育公平为政策目标的价值取向和以文本形式表达政策话语的逻辑。未来我国中小学师德问责政策将朝着育人为本的动力机制、多元化的价值取向、政策工具助力过程保障、政策话语日益合理科学等方向发展。

如何看待教授校长办学?

教授校长办学是大学服务中小学发展的一种很好的方式,目的在于促进基础教育事业的高质量发展。《教师发展研究》刊出“‘教授校长’办学笔谈”系列文章后引起了强烈反响。教授校长办学是有历史传统的,近代以来不断有大学教授肩负起双向使命,在将理论研究成果应用到中小学一线教育教学实践中去的同时,也把在中小学管理工作中经历的问题带回大学进行知识的再生产、再创造。未来,要想实现教授校长办学的常态化和可持续,还需从管理上给予体制机制的保障,同时要注意创新多种形式,助力大学更好地服务于基础教育高质量发展。

考虑接触影响的动车组轴箱弹簧特性分析

针对动车组轴箱弹簧工作圈与支撑圈接触导致刚度和服役寿命不满足设计要求的问题,以及采用传统一体式扫描建模不易实现两端支撑圈制扁并紧特征的弊端,根据弹簧几何结构拓扑关系,提出“下支撑圈-上支撑圈-工作圈”三段式建模方法,采用有限元软件ABAQUS的Python二次开发模块建立了轴箱弹簧精细化有限元模型,从而提升参数化模型的准确性。考虑工作圈与支撑圈接触效应的影响,从接触面积、刚度、应力等方面开展弹簧特性仿真分析,明晰接触关系对弹簧特性的影响规律,并通过试验验证仿真结果的准确性。分析结果表明:在轴向载荷作用下,工作圈和支撑圈间的接触线中段存在翘曲现象,随着载荷增加,接触面积呈指数增加,且刚度也呈现明显的非线性递增特性,在压并载荷下刚度比未接触时偏大17.1%;接触关系对临近支撑圈的工作圈切应力影响较大,但对工作圈中段影响较小,其仿真值与理论值最大误差为3.91%;采用参数化有限元模型仿真分析的刚度、内侧切应力与试验所测试的值误差均在5%以内,表明所提出的建模方法具有较好的可行性,为提升动车组轴箱弹簧设计质量和服役安全性提供参考。

大跨度钢结构施工过程的数值模拟与二次开发

大跨度钢结构空间造型丰富,施工阶段结构的传力路径与最不利受力位置动态变化。为解决施工过程结构分析与安全复核时建模计算流程繁琐的问题,基于AutoCAD与ANSYS软件开发了大跨度钢结构一键式建模、计算与结果读取的插件。该插件采用C#语言调用AutoCAD.NET框架,读取并输出大跨度钢结构图纸文件中的模型信息,自动生成结构有限元建模、计算与结果读取的APDL命令流,可用于大跨度钢结构施工过程的数值模拟与安全评估。以某单层球面网壳结构为例验证了所开发的大跨度钢结构建模分析插件的有效性,使用该插件快速建立了有限元分析模型,并复核了结构在施工阶段的内力和变形。研究结果表明,单层球面网壳结构在施工全过程中满足强度和稳定性要求,内力和变形在安全范围内且满足设计要求。该插件能够高效、准确地将大跨度钢结构信息由CAD软件传递至CAE软件,完成施工过程的数值模拟与安全评估。