我国宅基地使用权流转的解禁

农村宅基地等农地使用权流转一直为我国现行法律所禁止。这一起源于计划经济时期的农村土地管理法律制度在现阶段市场经济条件下面临日益严峻的挑战。尽管学术界在我国农地使用权能否流转问题上争议很大,但随着这一法律制度得以支撑的经济基础的丧失、对经济建设阻碍作用的凸现以及法律的公平性遭到质疑,解禁宅基地等农地使用权流转已为大势所趋。我国应当因势利导在正确的立法理念指导下,完善宅基地等农地使用权流转的配套法律机制,在试点的基础上逐步开禁宅基地等农地使用权的流转,科学完善农地使用权流转制度。     

网络环境下英语写作“过程体裁教学法”应用模式

针对“过程体裁教学法”在我国传统英语写作教学应用中存在的不足,文章基于韩金龙首创的“范文分析、模仿写作／集体仿写、独立写作和编辑修订”四个教学阶段,提出网络环境下英语写作“过程体裁教学法”的应用模式．希冀解决该方法在国内传统英语写作教学中因教学课时少、范文样本小、教学过程繁琐无法得以真正实施等问题,从而实现过程体裁教学法在写作教学中的最优化利用价值,为培养学生课外自主与交互学习习惯,提高英语写作实际能力创设良好的英语写作教学环境。     

信息缺失时基于HMM的故障诊断方法

在突发事件导致的事故中,状态监测与故障诊断系统的研究对象已经发生很大的变化,常规设计的状态监测与故障诊断系统往往很难满足要求.文章针对信息缺失提出了一种新的状态监测与故障诊断方法.该方法基于HMM模型的似然率计算过程,提出在发生信息缺失时,对缺失信号依据各模型采用最大似然率填充的方式进行故障诊断,并通过实际数据的测试实验对该方法进行了验证.验证结果表明,信号缺失时依据各模型采用最大似然率填充的方式进行故障诊断的方法是有效的.     

城市轨道交通与土地利用的耦合协调度评价——以上海市为例

以上海市为样本区域,运用系统论的方法,构建了反映城市轨道交通系统和土地利用系统发展水平的指标体系;在利用功效函数对轨道交通系统和土地利用系统的综合发展水平进行测算的基础上,构建了耦合协调度模型,并从时序角度通过综合发展指数和耦合协调度分析了上海市轨道交通-土地利用系统的协调性.结果表明:2000—2010年上海市轨道交通系统和土地利用系统综合发展水平稳步提高,两系统耦合互动效应明显.同时,轨道交通-土地利用系统的时序变动具有明显的波动性和阶段性.2000—2004年为失调阶段,轨道交通系统与土地利用系统协同效应不明显;2005—2006年为濒临阶段,两者协同效应开始显现;2007—2010年为协调阶段,两者互动效应逐步增强,但总体上两系统协调等级仍较低.     

网络环境下高职院学生开放式考核管理初探

针对新时期网络环境下的高职院学生,采取有效的日常考核手段成为学生管理的重点.文章对高职院学生日常考核管理的现状和成因进行分析,提出运用网络手段进行开放式考核的论点,并对其产生的效果进行论证.     

Overview of flowline bundle technology from concept selection to offshore installation

Flowline bundle system consisting of carrier pipe,sleeve pipe and internal flowlines offers innovative solution for the infield transportation of oil and gas. Due to its features,flowline bundle offers a couple of advantages over conventional flowline in particular for cases where multi-flowlines and high thermal performance is of great interest. The main benefits and advantages of such system include excellent thermal performance to prevent wax formation and hydrates,multiple bundled flowlines,mechanical and corrosion protection,potential reuse, etc. With the developments of offshore oil and gas industries,more and more hydrocarbon resources are being explored and discovered from shallow to deep water. Pipeline bundle system can be a smart solution for certain applications,which can be safe and cost effective solution. The objective of this paper is to overview pipeline bundle technology,outline detailed engineering design issue and procedure. Focus is given to its potential application in offshore for infield transportation. Engineering design principles and procedures for pipeline bundle system are highlighted. Construction methods of flowline bundle onshore are reviewed. Offshore towing and installation of pipeline bundle procedure is outlined.     

建筑施工进度的管理方法探讨

建设项目的进度管理,是施工管理中不可或缺的重要一环,有着特殊的重要性与作用。本文从现场施工管理的角度,阐述了施工进度管理在项目管理中的作用,并对如何做好施工进度进行了比较分析。     

一类具有吸收效应的时滞病原体免疫模型(英文)

研究了一类具有吸收效应的时滞病原体免疫模型.推导出系统的基本再生数与免疫再生数的表达式.通过运用Lyapunov泛函方法,分别给出了系统的无病平衡点、无免疫平衡点及地方病平衡点全局渐近稳定的条件.     

Magnetoacoustic tomography with current injection

Magnetoacoustic tomography combines the advantages of electrical impedance tomography with sonography.It can reconstruct conductivity images of biological tissue with high spatial resolution and high contrast.In addition,magnetoacoustic tomography is a new nondestructive functional imaging technology,with which we can realize the early diagnosis of human diseases.In this paper,through theory analysis we deduced the analytical formula of acoustic pressure.Computer simulation and experimental studies on magnetoacoustic tomography with current injection(MAT-CI)were made,and a copper ring was used as the model for the simulation and experiment.Experimental setup and methods are introduced,and the acoustic signals and the image of a metal object by means of MAT-CI are presented.Results of the simulation and experiment were in a good agreement.The reconstructed image of an acoustic source can reflect the conductivity information of a sample.The conductivity distribution of a sample can be obtained by means of MAT-CI.The results provide foundations of study on a model with complex conductivity distribution and tissues for MAT-CI.     

Development of DArT markers for a linkage map of flue-cured tobacco

Tobacco(Nicotiana tabacum) is one of the most economically important nonfood crops,and flue-cured tobacco accounts for approximately 80% of world tobacco production.An extremely narrow genetic diversity in the tobacco pool has led to a low efficiency of PCR-based molecular markers(such as AFLP and SSR).Diversity Arrays Technology(DArT) is a high-throughput hybridisation-based marker system that has been developed in many plants including wheat,which,like tobacco,has a complex genome.In this study,we developed a tobacco DArT chip that included 7680 representative sequence tags based on typical tobacco accessions.The 1076 DArT markers of flue-cured tobacco were identified and most(82.1%) of their polymorphism information contents(PICs) were greater than 0.4.An integrated linkage map that included 851 markers(238 DArT and 613 SSR),which is the highest density map of flue-cured tobacco to date,was constructed.This chip-based DArT system provides an alternative in high-throughput marker genotyping for tobacco.