国内

北京联通推4G/3G全能全享套餐 无网络使用限制 近日消息,在推出自由组合套餐后,北京联通日前又推出了4G/3G全能套餐和4G/3G全享套餐,用户通过预存话费,办理全能套餐可大幅提升套餐中的语音通话时长,办理全享套餐则可获得三倍于预存款的话费返还,使套餐更加超值。     

北京联通推4G/3G全能全享套餐 无网络使用限制

<正>近日消息,在推出自由组合套餐后,北京联通日前又推出了4G/3G全能套餐和4G/3G全享套餐,用户通过预存话费,办理全能套餐可大幅提升套餐中的语音通话时长,办理全享套餐则可获得三倍于预存款的话费返还,使套餐更加超值。目前,三家运营商都在进行4G网络的规划和建设。据了解,北京联通现有的WCDMA网络,只需简单升级即可平滑演进至4G网络,也很好的解决了与3G的兼容问题,现有3G用户可以不换卡不换号轻松升级到4G。更重要的是,平滑的升     

人们最关心的5G问题

如今,全行业加快5G网络建设,丰富内容应用、完善产业生态,5G发展取得积极成效.为了帮助用户更好地连接5G美好生活,5G用户数量持续攀升的中国移动针对用户关心的5G问题,带来周到、贴心的5G科普解答. 5G套餐是不是比4G套餐贵很多 目前中国移动5G套餐从128元起,分为7档,流量最高达到300 GB.不同档位的5G套餐,资费标准、套餐内容均有所不同,相对于4G档位套餐,5G套餐包含了更多流量资源,流量单价也更为优惠,还提供5G网络、服务、业务和会员等多项权益.从流量单价来看,2018年每个GB需要8.2元,而2020年每个GB降至4.4元,下降了46.4％.用户可以根据自身的实际需求选择合适的5G套餐.     

4G用户终端喜好分析

根据某地中国联通4G业务的营销数据,分析了4G业务营销活动类型分布以及合约购机用户的套餐分布。同时,针对合约购机用户,分析了4G用户的终端品牌与终端机型偏好,从中可看出移动终端行业的发展态势和市场占有率情况,可为移动终端行业的发展以及运营商进一步做好营销工作提供有益的数据支撑。     

4G价格战蓄势待发 资费将低于3G时代

<正>针对未来4G资费的趋势问题,北邮教授唐守廉近日表示称,4G时代的来临将会掀起新一轮的资费价格战,4G资费一定将会低于3G资费。在3G时代,国内电信运营商已经开始将收费标准较2G时代有明显的降低。对于在2G时代中的通话漫游费用,3G时代中联通、电信率先在3G套餐中取消了漫游的限制,用户的手机全国接听免费。另在流量费用方面,2G时代套餐超出后的资费普遍为1元/MB,而目前超出后的资费则一般为30元/100MB。     

广东联通开启换G风暴活动 4G套餐手机火爆热销

<正>随着联通4G网络以及4G/3G一体化资费套餐的正式推出,标志着中国联通4G时代的开启,也预示着4G市场的竞争将进入白热化阶段。近日笔者了解到,广东联通网上营业厅启动了"换G风暴全民疯抢"活动,包括超大流量的4G套餐和高端4G手机促销,让用户畅享高速4G网络。联通此次推出的"4G/3G一体化资费套餐",凭借着高流量、低资费、3G/4G一体化等优势,受到了广大用户的热捧。     

业界新闻

中国移动酝酿全国统一资费套餐不限3G或4G 在近日举行的中国移动媒体沟通会上,中国移动市场部相关人士透露,为方便用户,中国移动希望在全国逐步推进统一资费套餐,同时下调4G套餐使用门槛。据悉,中国移动希望各地资费套餐逐步统一,因为各地资费套餐不统一的话未来弊端很大,比如现在流行话费或流量抢红包,但各自资费不统一的话,话费或流量只能在一个省里的用户之间流转、赠送,不能做到全国通用。     

资讯前沿

正业界新闻中国移动酝酿全国统一资费套餐不限3G或4G在近日举行的中国移动媒体沟通会上,中国移动市场部相关人士透露,为方便用户,中国移动希望在全国逐步推进统一资费套餐,同时下调4G套餐使用门槛。据悉,中国移动希望各地资费套餐逐步统一,因为各地资费套餐不统一的话未来弊端很大,比如现在流行话费或流量抢红包,但各自资费不统一的话,话费或流量只能在一个省里的用户之间流转、赠送,不能做到全国通用。而之前中国移动在4G方面已做尝试,推出了     

电脑沙龙

@南方都市报：[4G资费香港比内地便宜一半剩余流量可卖掉]中国移动日前公布了其4G套餐的资费标准,而在香港,4G已经一早开始商业运营,在多家运营商的竞争下,4G的资费普遍比内地便宜,例如中国移动香港的4G资费,便比内地便宜一半,更推出交易平台,用户用不完的数据流量可以卖出去。     

新闻报

上网套餐卡名不副实遭投诉联通归咎经销商 40多名辽宁联通锦州用户将联合签名．向工信部举报他们购买的套餐卡名不副实,涉嫌欺骗用户。联通用户刘海平于2010年10月在淘宝网上购买了一张由辽宁锦州联通公司开出的20元包120小时上网的3G手机卡,该卡为“新势力_中学生Q仔卡”,其中包括3G网漫游和20元包120小时的上网业务。     

Recommending packages with validity constraints to groups of users

The success of recommender systems has made them the focus of a massive research effort in both industry and academia. Recent work has generalized recommendations to suggest packages of items to single users, or single items to groups of users. However, to the best of our knowledge, the interesting problem of recommending a package to a group of users (P2G) has not been studied to date. This is a problem with several practical applications, such as recommending vacation packages to tourist groups, entertainment packages to groups of friends or sets of courses to groups of students. In this paper, we formulate the P2G problem, and we propose probabilistic models that capture the preference of a group toward a package, incorporating factors such as user impact and package viability. We also investigate the issue of recommendation fairness. This is a novel consideration that arises in our setting, where we require that no user is consistently slighted by the item selection in the package. In addition, we study a special case of the P2G problem, where the recommended items are places and the recommendation should consider the current locations of the users in the group. We present aggregation algorithms for finding the best packages and compare our suggested models with baseline approaches stemming from previous work. The results show that our models find packages of high quality which consider all special requirements of P2G recommendation.     

从4G通信技术发展看5G

全球移动用户数量的增加以及用户对速度和通信质量要求的提高,直接促进了通信技术的飞速发展。追溯4G通信系统的兴起,通过对5G技术和当前新型网络架构的总结分析,预估未来5G网络的发展方向。虽然目前业界对5G的候选技术仍有争议,但总体来看,5G的未来机遇大于挑战,具有巨大的发展前景,同时,4G的日趋成熟也会为5G的发展奠定良好的基础。     

Free and Open Source Software versus Internet content filtering and censorship: A case study

This study critically investigates the main characteristics and features of anti-filtering packages provided by Free and Open Source Software (FOSS). For over a decade, the digital communities around the globe have used FOSS packages not only as an inexpensive way to access to information available on Internet, but also to disseminate thoughts, opinions and concerns about various socio-political and economic matters. Proxy servers and FOSS played a vital role in helping citizens in repressed countries to bypass the state imposed Internet content filtering and censorship practices. On the one hand, proxy servers act as redirectors to websites, and on the other hand, many of these servers are the main source for downloading FOSS anti-filtering software packages. These packages can provide secure web surfing via anonymous web access, data encryption, IP address masking, location concealment, browser history and cookie clean-ups but they also provide proxy software updates as well as domain name updates.The main objectives of this study are to investigate the role of FOSS packages in combating Internet content filtering and censorship and empowering citizens to effectively participate in communication discourse. By evaluating some of the well known FOSS anti-filtering packages used by Iran's digital community, this study found that despite the success of FOSS in combating filtering and state censorship, the majority of these software packages were not designed to meet the needs of Internet users. In particular, they are poorly adapted to the slow Internet connections in many developing countries such as Iran. In addition, these software packages do not meet the level of sophistication used by authorities to filter the content of the Net. Therefore, this study offers a new model that takes into account not only the existing level of the Internet infrastructure but also the growing number of Internet users demanding more effective FOSS packages for faster access to uncensored information while maintaining anonymity.     

On recommendation problems beyond points of interest

Recommendation systems aim to recommend items or packages of items that are likely to be of interest to users. Previous work on recommendation systems has mostly focused on recommending points of interest (POI), to identify and suggest top-k items or packages that meet selection criteria and satisfy compatibility constraints on items in a package, where the (packages of) items are ranked by their usefulness to the users. As opposed to prior work, this paper investigates two issues beyond POI recommendation that are also important to recommendation systems. When there exist no sufficiently many POI that can be recommended, we propose (1) query relaxation recommendation to help users revise their selection criteria, or (2) adjustment recommendation to guide recommendation systems to modify their item collections, such that the users׳ requirements can be satisfied.We study two related problems, to decide (1) whether the query expressing the selection criteria can be relaxed to a limited extent, and (2) whether we can update a bounded number of items, such that the users can get desired recommendations. We establish the upper and lower bounds of these problems, all matching, for both combined and data complexity, when selection criteria and compatibility constraints are expressed in a variety of query languages, for both item recommendation and package recommendation. To understand where the complexity comes from, we also study the impact of variable sizes of packages, compatibility constraints and selection criteria on the analyses of these problems. Our results indicate that in most cases the complexity bounds of query relaxation and adjustment recommendation are comparable to their counterparts of the basic recommendation problem for testing whether a given set of (resp. packages of) items makes top-k items (resp. packages). In other words, extending recommendation systems with the query relaxation and adjustment recommendation functionalities typically does not incur extra overhead.     

IPv4/IPv6主机之间强制隧道的设计与实现

分析了IPv4/IPv6主机隧道IP数据包的结构，提出了IPv4／IPv6主机之间强制隧道的结构模型，并利用PCAP、MySQLC、缓冲区等技术实现了IPv4／IPv6主机之间强制隧道。强制隧道在IPv6资源访问过程中自动建立，建立的过程对用户是透明的。     

DYNAMIC DISPLAY OF PERSONALIZED SOFTWARE FUNCTIONS

Generalized software packages endowed with a large spectrum of functionalities are often underutilized because users are not always aware of all the functionalities. It is hence desirable to display personalized information about the package. Though popular in web-based applications, personalization as a field of research in the design of generalized software packages is rare. This article develops a semi-Markov model of user navigation and an adaptive dynamic programming formulation to select high-utility software functions (states) for dynamically displaying them to a user. The personalization algorithm considers the interests of the software designers, the past users, and the current user. Frequency of visit to a state and the holding time in the state together determines the utility of the state. The personalization algorithm considers the interests of the software designers, the past users, and the current user. The algorithm is built in a demo package of ActiveX Servers and Controls. Graduate students tested the package. Pareto analysis and tests of hypothesis conducted on the test results indicate that the users did utilize the information on the displayed personalized software functions.     

The Package Blueprint: Visually analyzing and quantifying packages dependencies

Large object-oriented applications are structured over many packages. Packages are important but complex structural entities that are difficult to understand since they act as containers of classes, which can have many dependencies with other classes spread over multiple packages. However to be able to take decisions (e.g. refactoring and/or assessment decisions), maintainers face the challenges of managing (sorting, grouping) the massive amount of dependencies between classes spread over multiple packages. To help maintainers, there is a need for at the same time understanding, and quantifying, dependencies between classes as well as understanding how packages as containers of such classes depend on each other.In this paper, we present a visualization, named Package Blueprint, that reveals in detail package internal structure, as well as the dependencies between an observed package and its neighbors, at both package and class levels. Package blueprint aims at assisting maintainers in understanding package structure and dependencies, in particular when they focus on few packages and want to take refactoring decisions and/or to assess the structure of those packages. A package blueprint is a space filling matrix-based visualization, using two placement strategies that are enclosure and adjacency. Package blueprint is structured around the notion of surfaces that group classes and their dependencies by their packages (i.e., enclosure placement); whilst surfaces are placed next to their parent node which is the package under-analysis (i.e., adjacency placement). We present two views: one stressing how an observed package depends upon the rest of the system and another stressing how the system depends upon that package.To evaluate the contribution of package blueprint for understanding packages we performed an exploratory user study comparing package blueprint with an advanced IDE. The results show that users of package blueprint are faster in analyzing and assessing package structure. The results are proved statically significant and they show that package blueprint considerably improves the experience of standard browser users.     

An Industrial Perspective on Solid Modeling

A few solid modeling packages have reached the market, and early users like them—more are on the way.     

浅析选址难导致LTE弱覆盖的解决办法

随着工业和信息化部4G牌照的颁发,各大运营商纷纷大规模建设4G网络,通过为用户提供高品质、高速率的数据体验,来吸收高端用户。本文通过介绍LTE产业链产品状况,结合建设过程中遇到的问题,提出LTE无线基站信号覆盖解决方案。     

Correlation among cap design,gripping technique and age in the opening of squeeze-and-turn packages: A biomechanical study

Child-Resistant Packagings (CRPs) are important because they prevent children accessing potentially harmful products. However, the locking mechanism located on the caps still presents usability problems, especially for elderly users. The aim of this study was to evaluate the effects of packaging design, gripping technique and age in the transmission of torque when opening packages with squeeze-and-turn closures. Three different packages of mouthwashes (squeeze-and-turn type) were analyzed and two gripping techniques were used: tridigital and bidigital. The sample comprised one hundred subjects across five age groups equal in size (3–5 years; 8–12 years; 13–17 years; 30–59 years; over 60 years). For maximum torque measurement, the packages were adapted to receive a torquimeter internally installed and connected to the cap. The results show that packaging design, gripping technique and age are factors that influence the transmission of torque when opening squeeze-and-turn packages. In terms of the packaging design, the cap with the largest diameter allowed the application of higher torques. The opening process using the tridigital gripping presented higher values than the bidigital. In terms of the relative strength of grip across the age groups, children from 3 to 5 years presented the lowest torque values. However, the torque transmission with tridigital grip for children under 5 years old was higher when compared to the bidigital grip for all groups and packagings. The current findings provide biomechanical data on opening squeeze-and-turn packages, contributing to the design of packages that best balance safety and usability.