连铸保护渣中碳粉作用机构的探讨

碳粉是连铸保护渣中的重要组分之一。本文通过实验研究了连铸保护渣中所含碳粉的种类和数量对保护渣熔化特点的影响。结果表明,碳粉能延缓保护渣的熔化速度。不同种类的碳粉有着不同的氧化温度,并对保护渣熔化速度的影响亦不同。在制作保护渣时,碳粉的种类和加入量是应注意的重要因素。

一种适用于子弹药引信的预储能离心作用机构的设计与分析

针对联合国对子弹药未爆弹率及功能的要求,结合国内子弹药引信的发展现状,提出了对原有子弹药引信进行机械结构改进的方案。结合子弹药引信的结构特点及其工作环境特点,设计了一种预储能离心作用机构,并对其作用原理和作用过程进行了详细阐述。对该机构进行受力分析,按子弹药工作过程分阶段对其进行了可靠性计算和动力学仿真。计算和仿真结果表明,预储能离心作用机构能够可靠作用,达到了设计目的。

论预重整制度的建立、规范与完善——兼论专业中介机构的作用

预重整制度作为重整制度的一部分,随着处理"僵尸企业"市场机制重整制度的发展而从后台进入人们的视野,成为破产领域一个热门课题。目前学界对于预重整制度本身争议较多,其内涵也缺乏清晰、统一的界定,所以文章在厘清预重整制度内涵的基础上提出建立、规范和完善预重整制度,发挥其在破产重整中的作用。在整个过程中,专业中介机构一直伴随始终,对于预重整制度建立、规范和完善发挥着不可替代的作用。

双作用气缸执行机构在合成氨减压阀上的应用

对某合成氨装置合成气压缩机103-J蒸汽旁路阀MIC-22的液动执行机构进行改造,解决了冬季驱动油流动性差导致错油阀不动作,致使原液动执行机构在联锁动作时经常打不开的问题,又避免了漏油引起的火灾隐患和环保隐患。

轨道球阀执行机构技术改造应用

对轨道球阀执行机构的结构及功能进行分析,指出了执行机构存在的问题,并给出了执行机构技术改造的具体方案。改造方案实施后,保证了轨道球阀平稳安全运行,提高了企业的经济效益和社会效益。

水下闸阀执行机构研制技术

水下闸阀执行机构是控制深水闸阀开关状态的动力部件,工作原理是利用液压驱动阀杆伸出,弹簧回复力收缩阀杆,实现水下阀门的开启和关闭。本文详细介绍了某型号水下闸阀执行机构的工作原理、组成结构、主要零部件受力以及关键零件研制技术分析。通过水下闸阀执行机构研制过程的阐述,为国内水下闸阀自主创新提供了可借鉴的依据。

水下闸阀执行机构研制技术

介绍某型号水下闸阀执行机构的工作原理、组成结构、主要零部件受力,对关键零件研制技术进行分析。

Soil-structure interaction of unsymmetrical trench installation culvert

The computation of the design load on culverts in the current Chinese General Code for Design of Highway Bridges and Culverts （CGCDHBC）is primarily based on the linear earth pressure theory, which cannot accurately reflect the changes in vertical loads on trench installation culverts. So the changes in vertical earth pressure and soil arching effect in the backfill for an unsymmetrical trench installation culvert are studied based on a full scale experiment and finite element （FE） simulation. The variation laws of foundation pressure and settlement are also analyzed. Meanwhile, the influence of eccentric load induced by an unsymmetrical trench installation on the interaction of a soil- structure system is discussed. Results show that soil arch is formed when the backfill on the culvert reaches a certain height. It can relieve the earth pressure concentration on the crest of the culvert, but it is instable. The earth pressures obtained by full scale experiment and numerical simulation are greater than those calculated by the current CGCDHBC method. The eccentric load effect on the culvert has a significant influence on the stress states and deformation of the soil-structure system.

超精密机床伺服系统双模控制器的设计

提出了超精密机床伺服系统的双模控制方法 ,开发出基于该方法的新型闭环位置控制系统。该方法在不改变原有的控制器结构的基础上 ,可以有效地补偿由于动静摩擦所引起的执行机构死区非线性作用的影响 ,因此实现比较简单。实验证明 ,系统在低速跟踪时 ,采用该方法实现了最大跟踪误差小于± 0 .1μm。

Automatic Organization, Thinking Motion and Dynamics of the Universe

There are many automatic organization phenomena and automatic organization unities in the universe. The automatic organization whole refers to a life body with the thinking. The thinking is the core of automatic organization. The thinking is at eternal restless motion and binds to substances. The universe, organism and society are the automatic organization unities or life systems with the thinking. The thinking can perceive, attract, drive, organize and control all individuals and it is a force of life structure or universal gravitation and universal repulsion. The thinking has a life structure, a template and dynamic of entity-life＇s automatic organization. Life body has five dynamic systems： the thinking motion and information flow, breathing motion, closed-loop current （particle flow） and energy flow, interaction among state-varying, state-stabilizing and control organizations and active ＆ automatic chemical-physical reactions, cardiac pulsation and active motion and transportation. Human, galaxies and society can change from low to high energy state initiatively. This is realized by controlling the desires of life entity via the thinking and breathing motions and by altering the body＇s binding forces dominating the life entity （in turn, by bond force, strong interaction and quark confinement）. All forces in the universe present in the universe of life： force of the thinking-universal gravitation and universal repulsion, electromagnetic interaction, bond force, strong interaction, quark confinement and weak interaction. Under the automatic organization of the thinking, these forces bind into a 4-season＇ whole. The united state of these forces is controlled by the thinking and breathing motion, which is capable of changing from 3-, 2- and 1-dimensional states to a 0-dimensional state.

New Perspective for the Philosophy： Re-Construction ＆ Definition of the New Branches of Philosophy

In this article, author evaluated past/present perspectives about philosophy and branches of philosophy due to historical period, religious perspective, and due to their organized categories/branches or areas. Some types of interactions between some disciplines are given as an example. The purpose of this article is, to solve problems related with philosophy and past branches of philosophy, to define new philosophy perspective in the new system, to define new questions and questioning about philosophy or branches of philosophy, to define new or re-constructed branches of philosophy, to define the relations between the philosophy branches, to define good and/or correct structure of philosophy and branches of philosophy, to extend the definition/limits of philosophy, others. Author considered R-Synthesis as a method for the evaluation of the philosophy and related past branches of philosophy. This R-Synthesis includes general/specific perspective with eight categories, 21-dimensions, and twelve general subjects （with related scope and contents） for the past 12,000 years. It is a kind of synthesis of supernaturalism and naturalism, physics and metaphysics, others. In this article, author expressed 27 possible definitive/certain result cases of the new synthesis and defined the possible formation stages to express new theories, new disciplines, theory of interaction, theory of relation, hybrid theory, and others as constructional and/or complementary theories. These theories are considered for 21 major effective disciplines which are defined for a country and for the world. New philosophy perspective, branches of philosophy, and aims/purposes of R-Philosophy are defined to organize many inquiries about the name, number, and relation between special subject ＂X＂ and ＂philosophy of X＂ in some manner. This new perspective includes necessary and sufficient number of philosophy branches, and so it limits the number of ＂philosophy of X＂ in the philosophical system. New Era Philosophy is defined with its sub branches, its constructional philosophies, and with its 8D hybrid philosophy perspective. Ideal Philosophical System is defined with general/specific figure. Some of the new and/or re-constructed branches of philosophy explained with the new defined set of questions, new sub branches and constructional philosophies. Integration of the past/present branches of philosophy into the ideal philosophical system is explained generally. Philosophical interests of the some past philosophers and their relations with the ideal philosophical system expressed with table.

Hierarchical pore structure of activated carbon fabricated by CO_2/microwave for volatile organic compounds adsorption

An activated carbon pore-expanding technique was achieved through innovative reactivation by CO_2/microwave.The original and modified activated carbons were characterized by nitrogen adsorption–desorption,scanning electron microscopy,transmission electron microcopy,and Fourier transform infrared spectroscopy.The mesopore volume increased from 0.122 cm^3·g^(-1) to 0.270 cm^3·g^(-1),and a hierarchical pore structure was formed.A gradual decrease in the phenolic hydroxyl and carboxyl groups on the surface of activated carbon enhanced the surface inertia of granular activated carbon(GAC).The toluene desorption rate of the modified sample increased by 8.81% compared with that of the original GAC.Adsorption isotherm fittings revealed that the Langmuir model was applicable for the original and modified activated carbons.The isosteric adsorption heat of toluene on the activated carbon decreased by approximately 50%,which endowed the modified sample with excellent stability in application.The modified samples showed an enhanced desorption performance of toluene,thereby opening a way to extend the cycle life and improve the economic performance of carbon adsorbent in practical engineering applications.

Basic theory research of coal spontaneous combustion

Discussed latest research results of basic theory research of coal spontaneous combustion in detail,with quantum chemical theory and method and experiment syste- matically studied chemical structure of coal molecule,adsorption mechanism of coal sur- face to oxygen molecule and chemical reaction mechanism and process of spontaneous combustion of organic macromolecule and low molecular weight compound in coal from microcosmic view,and established complete theoretical system of the mechanism of coal spontaneous combustion.

Confessional Radio Stations and Social Communication for Political Change in Africa

The role of religious groups in the political field has arised in Africa in 1990s and despite being less visible it is still active. In fact, this is the climax of a very old process in Africa. Religion always participates in politics and vice versa. It is therefore not surprising that religious groups take into account political preoccupations in their communication processes. Sometimes they get involved in political debates, particularly when the questions reveal very important choices for the Nation, as it was the case in 1960s and 1990s. But mostly, they get involved in the social field which is, for them, the key to have one foot in political field. However, beyond these considerations, this paper intends to show how the use of media by religious institutions is closely related to their understanding of the relationship between the religion as an institution, and the society.

Dimension-Controllable and Photo-Responsive Supramolecular Organic Framworks through Cucurbit[8]uril-based Self-Assembly

Dimension-controllable supramolecular organic frameworks(SOFs)with aggregation-enhanced fluorescence are hierarchically fabricated through the host-guest interactions of cucurbit[8]uril(CB[8])and coumarin-modified tetraphenylethylene derivatives(TPEC).The three-dimensional layered SOFs could be constructed from the further stacking of two-dimensional mono-layered structures via simply regulating the self-assembly conditions including the culturing time and concentration.Upon light irradiation under the wavelength of 365 nm,the photodimerization of coumarin moieties occurred,which resulted in the transformation of the resultant TPECn/CB[8]4n two-dimensional SOFs into robust covalently-connected 2D polymers with molecular thickness.Interestingly,the supramolecular system of TPEC/CB[8]exhibited intriguing multicolor fluorescence emission from yellow to blue in the time range of 0-24 h at 365 nm irradiation,possessing potential applicability for photochromic fluorescence ink.

Practice of Project Management Methodology for Commercial Aero engines Based on Integrative Project Architectures

To collect and share information of projects or products and make it consistent and correct so that the quality and costs of projects can be effectively controlled,an integrative project architecture integrating different types of breakdown structures is necessary.In this paper,the international research status on work breakdown structure(WBS)was analyzed,and an integrative project architecture for commercial aero-engines was designed,where product breakdown structure(PBS),WBS,organization breakdown structure(OBS)and cost breakdown structure(CBS)were integrated and built.And the architecture was applied in information systems.A transfer from technological views of complex products through their lifecycles to management views has been realized with this standardized architecture,thus development tasks and costs can be controlled.

Multi-degree-of-freedom coupling dynamic characteristic of TBM disc cutter under shock excitation

When the tunneling boring machine(TBM) cutterhead tunnels, the excessive vibration and damage are a severe engineering problem, thereby the anti-vibration design is a key technology in the disc cutter system. The structure of disc cutter contains many joint interfaces among cutter ring, cutter body, bearings and cutter shaft. On account of the coupling for dynamic contact and the transfer path among joint interface, mechanical behavior of disc cutter becomes extremely complex under the impact of heavy-duty, which puts forward higher requirements for disc cutter design. A multi-degree-of-freedom coupling dynamic model, which contains a cutter ring, a cutter body, two bearings and cutter shaft, is established, considering the external stochastic excitations, bearing nonlinear contact force, multidirectional mutual coupling vibration, etc. Based on the parameters of an actual project and the strong impact external excitations, the modal properties and dynamic responses are analyzed, as well as the cutter shaft and bearings' loads and load transmission law are obtained. Numerical results indicate the maximum radial and axial cutter ring amplitudes of dynamic responses are 0.568 mm and 0.112 mm; the maximum radial and axial vibration velocities are 41.1 mm/s and 38.9 mm/s; the maximum radial and axial vibration accelerations are 94.7 m/s2 and 58.6 m/s2; the maximum swing angle and angular velocity of cutter ring are 0.007° and 0.0074 rad/s, respectively. Finally, the maximum load of bearing roller is 40.3 k N. The proposed research lays a foundation for structure optimization design of disc cutter and cutter base, as well as model selection, modification and fatigue life of the cutter bearing.

An Interactionist Perspective on the Internationalization of Curriculum in Colleges and Universities

This paper focused on the studies of interactionist theory and discussed the possibility that interactionist theory could be applied in internationalized curriculum in higher educational institutions. The following questions are proposed： （1） What is interactionist theory？; （2） How can we improve interaction between international students and faculty？; and （3） How can we improve interaction between international students and domestic students？ According to these questions, literature review was conducted to explain interactionist theory, and the possibility that interactionist theory can be applied in internationalized curriculum was discussed in two aspects： （1） enhancing the interaction between international students and faculty when teaching internationalized curriculum; and （2） enhancing the interaction between international students and domestic students when teaching internationalized curriculum.