data access rate 中文意思是什麼
data access rate
解釋
數據存取速率-
With the internet and multimedia generalization, more and more applications need high data rate access
隨著多媒體業務和internet的普及，越來越多的應用需要高速無線接入。 -
Users in wlan are mobile. that they can roam among the aps ( access points ) and achieve high data rate
無線局域網的用戶具有可移動性，可以在各接入點（ ap ）間漫遊，而且可以達到較高的數據傳輸速率。 -
For wireless communications, direct sequence code division multiple access ( ds - cdma ) techniques have received a great deal of attention due to the expectation of capacity increase, interference rejection capability, security, and so on. in a high data rate application such as multimedia services, however, the capacity of ds - cdma systems is limited by both the inter - chip, or inter - symbol interference
Cdma技術以其高抗干擾能力、高容量、高保密性等技術優勢在第三代移動通信系統中被廣泛應用，然而在高速數據業務中，嚴重的碼間干擾和符號間干擾會導致系統性能明顯下降。 -
Students should be able to compare and contrast the common types of communication links ( e. g. modem dialup or cable modem, leased line, broadband and wireless, etc. ) for internet access in terms of data transfer rate, cost, and reliability
5學生應能就數據傳送速率、成本及可靠程度等方面去比較及對比常用通訊連路種類，例如數據機撥接、電纜數據機、專線、寬帶及無線等。 -
As both the number of people with access to the internet and e - commerce volume continue to grow at a rapid rate, more and more commercial and sensitive data are being put on - line and transferred through the internet
由於網際網路及電子商貿的使用者數量急速增長，愈來愈多的商業及敏感數據已經上網，並透過網際網路往來傳送。此現象難免會引起潛在犯罪份子注意。 -
Holographic storage, with its large storage capacity, high readout rate and capability of permitting parallel access to data, promises to become the next generation of potential mass storage medium
光全息存儲技術以其大存儲容量、讀取速率高及可并行讀取等獨特優點而具有廣闊的應用前景，被認為最有希望成為下一代海量存儲技術。 -
We firstly study some aspects, such as the modulation ( ofdm ) in the physical layer and the media access control ( mac ) protocols, combining reliable data transmission with high - throughput access methods and real - time, quality - of - service ( qos ) features. some problems exist in tcp applications over plc, because the high bit error rate makes it difficult to estimate the round trip time ( rtt ) and causes unnecessary retransmission
通過對現有的兩種產品（ homeplug和inari ）的mac協議：類似無線通訊csma ca協議（以競爭為基礎）和集中式的令牌環（ ctp ）協議（避免競爭）的媒質接入控制的原理進行分析和計算，對兩個協議進行了性能評價及分析了它們對qos的支持。 -
Different from traditional routers, the gateway proposed here focuses on the routing strategies rather than the routing protocol itself. it maximizes the utilization rate of each network access line by forwarding data packets according to the routing strategies of each network respectively
與傳統路由器不同，本文提出的轉發網關，並不關心路由協議本身，而將重點放在路由策略上，通過訪問兩個網路的不同路由策略實現數據包的動態轉發，使得每條接入線路的利用率達到最大。 -
The input votage range is 20mv 10v, frequency range is 0 ~ 20khz. the ad sampling rate is 100ksps, distinguishability is 16 bit. it uses two groups of ram to real - time store the collected data by time - sharing store and access technique, and uses a dsp chip to real - time analyse the frequency spectrum
信號輸入電壓范圍20mv 10v （七檔量程可選） ，輸入頻率范圍0 ~ 20khz ， ad采樣率100ksps ，解析度16bit ，採用兩組ram存儲器分時存取的方法實時存儲採集數據，使用dsp晶元進行實時頻譜分析，通過pci總線與主機進行數據交換。 -
The technology of direct sequence spread spectrum / code division multipul access ( dsss / cdma ) are applied in the broadband code division multiplex wireless communication systems, which means transmitting data at the rate of 2. 048mbps using four e1 lines within the band of 20mhz. in this paper, the theory of the whole debice is first analysized specified for the system asic design and optimizing its performance
寬帶碼分復用無線傳輸系統是採用直接序列擴頻/碼分多址（ dsss / cdma ）技術，在20mhz頻帶內實現四路2 . 048mbps的e1鏈路數據速率的無線傳輸。本文首先分析了整個數傳設備實現原理，針對系統asic設計和優化整機集成性能出發，提出並實現了基於fpga控制pm4314e1晶元的介面模塊完成對e1鏈路信號的監控和告警功能的改進方案。 -
Nowadays, data traffic of internet are continually developing and the fixed access rate ( hdsl, adsl, vdsl ) are continually upgrading. the development of the third generation mobile communications system ( 3g ) is very rapidly
在當今internet數據業務不斷升溫中，在固定接入速率（ hdsl ， adsl ， vdsl ）不斷提升的背景下，第三代移動通信發展的速度非常迅速 -
We analyze the previous replication algorithms, and bring forward a new replication algorithm on the basis of ‘ access rate ’. different from the previous which account the access of data items, the algorithm records the relative access rate of attributes. in the way, a large amount of memory space and cpu time is saved
文章在分析以往數據復制緩存演算法優缺點的基礎上，提出了基於訪問率的數據復制緩存演算法，將對于每個數據項的使用評估轉換為對于屬性的評估，能夠減輕系統的存儲和計算負擔。 -
Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background
在發射機和接收機使用多個天線進行數據傳輸的多輸入多輸出（ mimo ）技術，可以在不增加帶寬和天線發送功率的條件下，成倍的提高頻譜利用率，提高系統的通道容量，還可以抗多徑干擾。第三代移動通信wcdma即將到來，為了將多天線技術（ mimo ） ，空間分集技術，空時編碼技術用到wcdma系統中去，為第三代移動通信向第四代移動通信系統平穩過渡奠定一定的基礎，需要做一些理論上的研究。 -
With the developent of mobile communication systems, the third generation systems are under the way0 it can provide the high bit rate servies that enable high quality images and vidio to be transmitted and receiced, and to provide access to the web with high data rates
移動通信發展至今，已走過了兩代，現在人們正把目光聚焦在第三代移通信上。第三代移動通信能提供高速數據傳輸以支持多媒體業務，能實現全球無縫漫遊，能在任何時候、任何地點進行任何種類（ www ）的通信。 -
In the code division multiple access ( cdma ) system, the multiple access interference ( mai ) mitigation capability as well as system capacity are determined, to a great extent, by the correlation properties of spreading sequences ; while adaptive modulation and coding ( amc ) with high spectral efficiency is the key technique to obtain high speed and low symbol error rate ( ser ) performance in mobile data transmission
在碼分多址（ cdma ）系統中，擴頻序列的特性在很大程度上決定了抗多址干擾（ mai ）能力和系統容量，而高頻譜效率的自適應調制編碼（ amc ）技術則是獲得高速率和低誤碼率（ ser ）移動數據傳輸性能的關鍵因素。 -
The normal user must go through the access network and backbone to access the internet via icp there are always high - rate and broadband lines connected to the backbone, the backbone of telecom can provide wide enough bandwidth for all the data transmission as more and more optic fiber with wdm and dwdm technologies have been paved. but " the last mile " from user ' s home to central office is still narrow - band and analog, which becomes bottom - neck of the communication subnet preventing it from being widen
一般用戶使用internet時要經過接入網，電信主幹網，最後達到icp （ internetcontentprovider ：因特網內容提供商） 。其中icp一般有著高速寬帶的線路與主幹網相連，而主幹網由於波分復用或密集波分復用的光纖技術的大量使用，使得其可提供足夠的帶寬使用，但是，接入網? ?從用戶家庭到電信網的局端的這「最後一公里」 ，仍然是窄帶的、模擬的，這「最後一公里」就是電信網寬帶化的瓶頸。 -
Future wireless communication systems trend to provide multi - services to mobile users. cdma technique is adopted by the 3rd generation mobile communication systems due to its flexibility in supporting multi - services. how to keep qos of heterogeneous services and utilize the scarce radio spectrum resources is challenging for 3rd generation mobile communication systems in this thesis we developed a radio resource allocation framework for wireless code division access ( cdma ) networks that support multi - class traffic with different data rates and bit error rate requirements. we proposed a new resource allocation scheme using joint adaptive power control and mmse multiuser receiver in multipath fading system
為移動用戶提供多種業務服務是未來無線通信網路的主要發展方向。由於cdma技術具有靈活支持多種業務的優點，因而被第三代移動通信系統所采納。如何在惡劣的無線傳播環境里以及用戶運動且相互干擾的情況下為為各類業務提供qos保證，同時充分利用珍貴的無線頻譜資源，是基於cdma技術的第三代蜂窩通信系統必須致力解決的問題。 -
To boost the development of broadband access, beijing telecom has launched its adsl service to transmit voice and data signals on one twisted pair. as a rate asymmetric copper line access technology, adsl enables an uplink rate of 640kbps and a downlink rate of 1. 5 to 8mbps on one subscriber line
Adsl是一種新的在一對雙絞線上同時傳輸電話業務與數據信號的技術，它屬于速率非對稱型銅線接入網技術，並且可以在一對用戶線上進行上行640kbits 、下行達1 -
Owing to the advantages in high storage capacity, fast data transfer rate, and short access time, volume holographic memories ( vhm ) are considered to meet the needs
體全息存儲器因其存儲密度高、存儲容量巨大、存取速度極快的獨特優勢，可望滿足這種需求。基於體全息存儲器的相關識別也因此得到廣泛的研究。 -
The scada system based on gprs has a even more broader application scope that is applicable to almost all sorts of data transition operations with middle or low rate in any environment, such as internet access, personal information, finance, traffic and so on
基於gprs的scada系統具有更為廣泛的應用范圍，幾乎任何環境的所有中低速率的數據傳輸業務都可以適用，如internet接入、個人信息、金融、交通等。
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