基于微簇的无线传感器网络能量均衡路由协议

设计了两种能量均衡策略,提出基于微簇策略的能量均衡路由协议.该协议将相邻两节点联合成微簇,微簇内的节点基于剩余能量进行负载调配.以实现局部的能量均衡;对节点间的梯度值进行模糊分级,并将模糊等级选择策略与质量评价函数相结合进行下一跳节点选择,以实现全局的能量均衡.仿真表明该协议能更均衡地利用有限能最,降低节点的平均能耗和传输时延,延长无线传感器网络的寿命.     

信息安全的相关技术及研究

信息安全是当今信息社会的重大问题,本文分析了国内外信息安全理论、管理和相关技术,结合信息安全的发展趋势,详细阐述了信息安全管理和理论的最新进展．对今后信息安全的建设提出了一些思考和建议。     

Cadherin 22 participates in the self-renewal of mouse female germ line stem cells via interaction with JAK2 and β-catenin

The self-renewal capacity of the stem cell pool determines tissue function and health. Cadherin-22 (Cdh22), a member of the cadherin superfamily, has two splicing patterns in rats, and the short type that lacks a catenin binding domain is closely related to spermatogonial stem cell self-renewal. Previously, we reported that CDH22 was highly expressed in mouse ovary germ cells, especially in female germ line stem cells (FGSCs). However, its underlying function in FGSCs is still not clear. Here, we found that Cdh22 encodes only one type of protein product in mice and demonstrated that CDH22 was required for FGSC self-renewal. In addition, JAK2 and β-catenin were found to interact with CDH22 and be involved in CDH22 signaling in mouse FGSCs. Moreover, extrinsic CDH22 was identified as a potential molecule that participates in FGSC adhesion and is pivotal for FGSC maintenance and self-renewal. These results reveal that CDH22 functions as an essential molecule in FGSC maintenance and self-renewal via different mechanisms, including interaction with the JAK-STAT signaling pathway and β-catenin.     

High-current MoS2 transistors with non-planar gate configuration

The ever-decreasing size of transistors requires effectively electrostatic control over ultra-thin semiconductor body.Rational design of the gate configuration ...     

Delta Sigma调制器非理想因素建模

提出并构建了开关电容积分器Delta Sigma调制器非理想因素行为级模型,该模型基于Matlab中的Simulink工具,包含开关非线性、时钟抖动、量化器非线件和积分器非线性等调制器非理想囚素,能为电路模块的设计提供精确的设计指标.重点研究并实现一种运放非线性直流增益模型,仿真结果表明它能更有效反映奇次谐波失真.同时综合考虑调制器其他非理想因素,例如采样噪声、开关非线性电阻以及运放参数(色化噪声.增益带宽,摆率,饱和电压),仿真得到其对调制器性能的影响.     

湖南土壤酸沉降敏感性研究

根据湖南酸雨污染的特点,模拟酸雨对土壤,ＰＨ的影响,绘制了不同类型土壤的酸缓冲曲线,以探讨各类土壤的酸害容量和酸缓冲能力的大小,从而推断出各类土壤酸敏感性强弱,提示弱对湖南不同土壤的酸化趋势。     

从零售生命周期看中国零售业态的变革

本文通过对零售生命周期理论的研究,根据我国零售业的实际现状,对中国零售业态的过去、现状进行分析、总结,对发展前景进行幢憬,相信本文对中国零售业态发展的方式、规划及目标的确立会有一定的作用。     

Typical Construction Program of 600 MV Unit Supercritical Boiler Boiler

文章介绍了国产600 MW机组超临界直流锅炉的施工方案,重点论述了主要施工机械和布置、施工方案简介,前后炉膛的吊装顺序.     

旧水泥混凝土路面利用及补强设计

以太原市玉门河街道路改造工程设计为例,对旧水泥混凝土路面的利用和补强进行了分析、研究和论述,提出了经济可行的沥青加铺层设计方案.     

一个有限Abel群分解为P群直积的算法

设Ｇ为有限Ａｂｅｌ群,｜Ｇ｜＝Ｐｒ１１…Ｐｒｍｍ（Ｐ１,…,Ｐｍ为质数）．给出了一个将Ｇ分解为Ｐ群直积的算法