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Search Results: 1 - 10 of 157995 matches for " 唐文俊? "
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从世界氦形势看我国氦的未来

天然气工业 , 1986,
Abstract: ?本文介绍国外氦的生产、消费及供求形势,并将我国氦的产销水平与国外比较,阐明我国氦工业及应用技术与国外的差距,提出如何借鉴国外经验,对我国氮生产进行长远预测和规划.
聚乙烯醇(PVA)/壳聚糖(CS)合金膜的醇―水渗透...
,
功能高分子学报 , 1992,
Abstract:
教育电子身份认证系统的安全策略研究
A Study on Security Strategies of Educational Electronic Identity Authentication System
 [PDF]

周庆华, 刘磊, 勇军, , 立军
Computer Science and Application (CSA) , 2016, DOI: 10.12677/CSA.2016.66043
Abstract: 教育电子身份认证系统涵盖了以e2ID提供认证服务的教育应用系统日常运行的方方面面,因而保障其安全、稳定地运行显得尤为重要。本文分析了教育电子身份认证系统存在的各种安全隐患,从管理和技术两方面提出了保障教育电子身份认证系统安全、稳定运行的安全策略。
The authentication system of educational electronic identity covers various aspects in daily oper-ations of educational application system in which authentication is served by e2ID. Therefore, its security assurance and steady operation are extremely important. This paper analyzes a variety of security risks in the educational electronic identity authentication system, and puts forward safety strategies from both the management and technical measures.
基于教育电子身份号的关联认证
Education Electronic Identity Based on the Related Certification
 [PDF]

勇军, 李程, 王键, 樊志良, , 立军
Computer Science and Application (CSA) , 2016, DOI: 10.12677/CSA.2016.65032
Abstract: 针对多个应用系统组成的集成平台,用教育电子身份号(e2ID)研究实现关联认证,通过单点登录、实名制访问多应用系统,节省了网络资源,提高了访问效率。经在湖南省教育厅湘教云平台应用测试,该方法在不改变原用户体系独立运行模式的基础上,能够实现各独立应用系统之间的资源整合,并具有高并发情况下的快速响应能力。
A multi-application systems integration platform has been achieved via associated certification of Education Electronic Identity. Therefore, the network resources are saved and the efficiency of access is improved through Single Sign-On and real-name to access multi-application systems. The Education Department of Hunan Province Xiang Teaching Cloud tests demonstrates that this me-thod doesn’t change the independent operating mode of original user system, realizing the resource integration among various independent applications and keeping the ability to respond quickly under high concurrency at the same time.
一种石油设备故障声音定位系统研究
Research of Sound Localization System about Petroleum Equipment Failure
 [PDF]

陈红新,, 马涛, 刘德雄, 彭贵, 永强
Hans Journal of Chemical Engineering and Technology (HJCET) , 2012, DOI: 10.12677/HJCET.2012.24019
Abstract: 本设计以TI公司超低功耗MCU MSP430G2553处理器为核心完成。在一块不大于1 m2的平板四角外侧分别固定安装一个声音接收模块,声音接收模块经过滤波接收石油设备故障位置发出的不正常频率声音信号并将其传输到信息处理模块,声音定位系统控制系统通过查表法根据声音经过空气传播到各声音接收模块的声音信号来判定石油设备故障所在的位置坐标,同时通过12864液晶显示屏将石油设备故障处的XY坐标显示出来,从而来制作一个可以检测在500 mm ×350 mm的坐标纸内石油设备故障具体位置的声音定位系统。
The design uses TI’s ultra-low power the MCU MSP430G2553 processor as core. We fixed installation a receiver module at all of the four corners of a flat which is not greater than1 m2, receiver module receivers the unnor- mal frequency voice signals due to petroleum equipment failure after filtering and transmitted it to the information processing module, control system according to the voice the receiver module received to determine the coordinates of the location of the petroleum equipment failure on look-up table, at the same time 12864 LCD shows the X, Y coordi- nates, so as to produce a sound localization system can determine the coordinates of the location of the petroleum equipment failure in500 mm×350 mmsquared paper.
基于石墨烯光机械系统的光学三极管和相干光学存贮
Optical Transistor and Coherent Optical Storage Based on Graphene Optomechanics System
 [PDF]

陈华, 方贤, 旭东, 缪广红, 朱卡的
Applied Physics (APP) , 2015, DOI: 10.12677/APP.2015.510016
Abstract:
原子尺寸厚度的二维纳米材料——石墨烯,由于它对于研究其量子运动行为的独特性质,石墨烯也许是构成纳米机械振子的最终纳米材料。本文在红边带条件下,通过用一个强的微波泵浦场和一个弱的信号场驱动石墨烯纳米机械振子–微波腔耦合系统,理论证明了系统中的光机械诱导透明。在蓝边带条件下,通过计算信号场的透射谱,发现信号场可以实现有效地减弱和放大取决于栅极场(泵浦场)的功率强度。这样在蓝边带下石墨烯光机械系统呈现出类似一个光学三极管实现弱微波信号的放大。此外通过控制强泵浦场,石墨烯光机械系统可以实现快光和慢光效应,并且通过调节腔场与泵浦场之间的失谐能实现快光和慢光效应之间的转换。石墨烯光机械系统对于光的存储将会是一个很有希望的方案,同时对于在通讯和量子信息技术上的应用也指出了一个方向。
Graphene, atomically thin two-dimensional nanomaterials, may be considered as the ultimate nanomaterial for fabricating nanomechanical resonator due to its unique properties for studying its quantum behavior of the motion. In this work, we theoretically demonstrate optomechanically induced transparency based on the coupled graphene nanomechanical resonator-microwave cavity system with a strong microwave pump field and a weak signal field under the condition of red sideband. At the blue sideband, the signal field can be efficiently attenuated or amplified with calculating the transmission spectrum of the signal field, depending on the power of a second “gating” (pump) field which can behave as an optical transistor to amplify a weak microwave field. In addition, the graphene optomechanics can obtain the slow and fast light effect with controlling the strong pump field, and the slow and fast light effect can be switched via adjusting the detuning between the cavity field and the pump field. This scheme may be a promising candidate for light storage and pave the way for numerous applications in telecommunication and quantum information technologies.
基于多模式光机械系统的相干完美吸收与透射
Coherent Perfect Absorption and Transmission Based on a Multi-Mode Optomechanical System
 [PDF]

陈华, 方贤, 旭东, 缪广红
Applied Physics (APP) , 2015, DOI: 10.12677/APP.2015.512024
Abstract:
本文提出一种广义的多模式腔光机械系统,其中两光学腔由一束较强的控制场和一束较弱的信号场驱动与同一个机械振子耦合。较弱的信号场将会被该系统完全吸收而不产生任何能量输出,定义该现象为相干完美吸收,并且当相干完美吸收产生时输入信号场的能量将由两个腔场和机械模所分担。改变参数条件,较弱的输入信号场将由一个腔传递到另一个腔而不产生任何的能量损耗,定义该现象为相干完美透射。上述两种现象可由两腔场之间的耦合所操控,并进一步分析了该现象产生的起源和条件。上述两种现象将在全光学领域中的量子信息方面有着潜在的应用。
We present a generalized multi-mode cavity optomechanical system, where two cavity modes with strong control fields and weak signal fields are coupled to a common mechanical resonator. The weak input signal fields will be entirely absorbed by the system without generating any energy output from each of the cavity modes termed coherent perfect absorption (CPA), and the two cavity modes and mechanical mode will share the input probe fields energy when CPA occurs under parameter regimes. With changing the parameter conditions, a weak input signal field will transmit from one cavity to the other cavity without undergoing any energy loss termed coherent perfect transmission (CPT). The above phenomena are dependent on the coupling strength between the two cavity modes in this optomechanical system. The origin and conditions that enable these phenomena to achieve are analyzed, and potential applications in quantum information may be realized in all-optical domain based on such phenomena.
东濮凹陷前梨园洼陷热史及烃源岩热演化
Thermal History and Source Rock Thermal Evolution History in the Qianliyuan Sub-Sag, Dongpu Sag
 [PDF]

世林, 左银辉,, 张云献,
Open Journal of Nature Science (OJNS) , 2016, DOI: 10.12677/OJNS.2016.44049
Abstract:
东濮凹陷为临清坳陷重要的生油构造单元,是渤海湾盆地最具有油气勘探潜力的凹陷之一。其中前梨园洼陷是整个东濮凹陷增储的主要地区,为了揭示其热史及烃源岩热演化历史,首先利用5口典型井的镜质体反射率数据恢复了前梨园洼陷的热历史,结果表明前梨园洼陷在沙河街组沉积开始至东营组沉积末期,经历了两期裂陷作用,地温梯度出现两期峰值,为39℃/km~48℃/km和38℃/km~40℃/km。再以热史为基础,结合沉积和构造发育史及烃源岩地球化学资料,模拟了前梨园洼陷5口典型井6套烃源岩的成熟度演化历史,揭示了前梨园洼陷烃源岩成熟度演化受东营组沉积时期古地温场控制,6套烃源岩成熟度都在东营组沉积末期达到最高,这将为前梨园地区深层油气勘探提供参考。
The Dongpu sag is an important generation hydrocarbon area of tectonic units in the Linqing de-pression of the Bohai Bay Basin, which has the greatest potential for oil and gas exploration. The Qianliyuan sub-sag is the main area of increasing oil and gas reserves in the Dongpu sag. In order to reveal the thermal history and source rock thermal evolution history, the thermal history of the Qianliyuan sub-sag was reconstructed based on vitrinite reflectance data from 5 typical wells. The results show that Qianliyuan sub-sag has experienced two phases of rifting, and the geothermal gradient reached twice high peaks during the early stage of the Shahejie Formation depositional period (39?C/km - 48?C/km) and the late stage of the Dongying Formation depositional period (38?C/km - 40?C/km). Moreover, based on the thermal history results, combined with the sedimentary and tectonic histories and source rock geochemical data, six sets of source rocks maturity history of 5 typical wells were simulated in the Qianliyuan sag. The results reveal that source rock thermal evolution is controlled by the paleo geothermal fields of the Dongying Formation depositional period in the Qianliyuan sag. The maturity of 6 sets of source rocks reached a maximum at the late stage of the Dongying Formation depositional period. This work will provide reference for deep oil and gas exploration in the Qianliyuan area.
聚乙烯醇(PVA)/壳聚糖(CS)合金膜的醇-水渗透汽化分离性能研究
,,赵红
功能高分子学报 , 1992,
Abstract: 在表征了PVA/CS共混体系相容性的基础上,本文报导MeOH-H_2O,EtOH-H_2O和i-PrOH-H_2O体系在PVA,CS及其合金膜中的渗透汽化行为。讨论了温度、料液浓度、合金膜的组成对分离性质的影响。从膜的分子和聚集态结构出发对相关的渗透行为进行了解释。对于PVA、CS及其合金膜来说,膜内自由体积大小看来是影响分离性能的主要因素,小分子在膜中的渗透性质主要是由扩散控制的。
基于modis数据的宏观土地利用/土地覆盖监测研究
,张树
遥感技术与研究 , 2002,
Abstract: 建立土地动态监测系统,快速提供各种土地利用变化信息是实现资源保护的基本手段。而及时准确地获取覆盖广的地表影像资料是大范围动态监测的重要环节。介绍了modis影像数据的特点,并与其它遥感数据源进行了比较,就其在土地利用中的应用进行了探讨。分析了松嫩平原2001年9月modis影像的特征,准确地解译出该区在宏观上的土地利用方式,为监测该区土地沙化、盐碱化和农作物生长提供了科学依据。
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