In this paper, we aim to enhance the performance of the range-free algorithms.
怎么克服无需测距的定位算法定位精度不高的缺点是本文的主要任务。
A novel range-free localization approach-smallest enclosing circle based localization (SECL) has been pro - posed.
提出一种新的无需测距定位算法——基于最小包含圆的定位(SECL)。
The mobile anchor spreads its location information to unknown nodes, assisting which to make range-free localization.
移动锚节点在网络中不断传播自己位置，协助未知节点定位自身位置。
There are mainly two types of localization algorithms: the range-based localization algorithms and range-free localization algorithms.
节点定位算法大致可分为两类：基于测距的算法和无需测距的算法。
The range-free algorithm does not need additional hardware, and, thus, it is a cost-effective approach for the WSN localization problem.
而无需测距的定位算法不需要额外的硬件条件，是解决定位问题的一个比较经济适用的方法。
If more useful information is available, the localization accuracy of the existing range-free localization algorithms should be increased.
如果传感节节点能得到更多有利于定位的信息，显然可以做到在已有算法的基础上提高定位的精度。
How to use Sequential Monte Carlo method for range-free localization scheme when we estimate the unknown node position in Wireles Sensor Networks?
在估计无线传感器网络未知节点位置时，如何使用与距离无关的贯序蒙特卡罗算法?。
On the day of the interview, she was putting dates and labels on cartons of eggs from hens who are range-free for placing in the boxes for subscribers to Earthrise Farm.
在我采访她的那天，她正在鸡蛋外面的硬纸盒包装上粘贴日期和商标。那些鸡蛋是散养的母鸡下的，这些鸡蛋将放在预定的份额成员的盒子里。
This paper classifies the node localization technologies into two categories: range-based and range-free, then introduces and analyses several typical localization technologies.
该文将节点定位技术分为基于测距的和无需测距的两类，介绍和分析了几种典型的定位技术。
Looking at this family's lifestyle gives the authors the opportunity to explore subjects like range-free eggs, animals raised humanely, and fishing practices and farm-raised fish.
通过了解这个家庭的生活方式，作者有机会探讨土鸡产的蛋，人道饲养的动物及捕捞鱼和渔场养殖的鱼。
Gene flow, the movement of alleles across the range of the species, is relatively free because individuals can move and then mate with individuals in their new location.
基因流动，即等位基因在整个物种范围内的移动，是相对自由的，因为个体可以移动，然后在新的地点与个体交配。
Free Range eggs are also laid by hens that enjoy the freedom of a hen-house, but have the added benefit of access to an outside run.
散养鸡蛋也可能是这样的母鸡下的——它们在鸡舍里享受着自由，而且有额外的福利可以在外面跑。
Many people soothe their consciences by purchasing only free-range fowl and eggs, blissfully ignorant that "free range" has very little practical significance.
许多人只买自由放养的家禽和鸡蛋，以此来安抚自己的良心，幸福地忽视了“自由放养”几乎没有实际意义。
The industry is betting that the same consumers paying more for premium attributes such as free-range, non-GMO, and pasture-raised eggs will embrace sustainability.
该行业正押注打赌：那些花更多钱为“自由放养”、“非转基因”、“牧场饲养鸡蛋”等高品质属性买单的消费者，同样会欣然接受可持续性的概念。
If an eggbox doesn't specifically say "Barn", "Percher" or "Free Range", the eggs that it contains are almost certainly battery produced.
如果一个鸡蛋盒没有特别标明“谷仓”、“高处栖息”或“散养”，那么里面的鸡蛋几乎肯定是批量生产的。
If you share our anxieties about the suffering caused by the caging of battery hens, we would like you to put Barn or Free Range eggs on your shopping list too.
如果你和我们一样对笼中饲养的母鸡所遭受的痛苦感到焦虑，我们希望你也把谷仓或放养的鸡蛋列入你的购物清单中。
Advertisers would then be willing to pay more, which would in turn mean that consumers prepared to opt into such things could be offered a richer and broader range of free online services.
广告商因此乐意付出更多的广告费用，相反，这意味着准备选择这些商品的消费者将被提供更加丰富、更大范围的免费的在线服务。
Foreign visitors remarked both on the free range of speech there and on the mingling of classes and professions.
外国游客评论道：“在这里，不同行业不同地位的人齐聚一堂，无拘无束，自由畅谈。”
A range of subsidies, plus free schooling and health care, prop up living standards.
一点补贴，加上免费的教育和医疗，仅达到生活标准。
For example, to call chickens "free range," a company "must demonstrate to the Agency that the poultry has been allowed access to the outside," according to USDA regulations.
譬如，根据美国农业部的规定，为出售“散养”的鸡，公司必须向认证机构证明这些鸡能够自由到鸡圈外面活动。
Also, remember that you can find a wide range of free tools online with a bit of searching.
此外，请记住，只要稍做搜索，就可以在网上找到许多免费工具。
While free range organic food may be hard to come by in some areas, it is worth checking – if restaurants recognise a demand for cruelty-free food they may stock it in future.
如果在自由放牧的农场产品和有机食品稀缺的地区，就更值得关心你所点的菜来自哪里了——如果餐厅意识到游客需要从被善待的动物身上产出的食物，他们以后就会去采购。
Even if it is raised “free range, ” it still livesa life of pain and confinement that ends with the butcher’s knife.
即使是“自由放养”的，仍然是过着痛苦、禁闭的生活，最终命丧屠刀。
The animals from Cuba can expect the diet to be better in their new home and the visitors to be slightly more free-range.
来自古巴的动物们可以期待在自己的新家有好一点的饮食，而游客们也会给他们稍微多一点自由。
A flock of geese graze on a Shropshire hillside as they are reared in their free-range environment for the Christmas market in Shrewsbury, England.
一群鹅在什罗普山坡放牧这群自由放养的鹅准备在圣诞节在英国什鲁斯伯里上市。
A fresh, free-range egg should last beautifully at room temperature for at least a week but, with the ever-present risk of salmonella, all authorities now recommend keeping them refrigerated.
一只新鲜的自由放养的鸡下的蛋，应该可以在室温下完好地存放至少一周，然而因为沙门氏菌的存在，专家都建议把它们放在冰箱里面。
Buy your eggs, chicken and other meats only from free-range farming.
只从散养养殖农场购买鸡蛋，鸡肉和其他肉类。
Choose grass-fed, organically raised cattle and free-range, organic chicken and eggs to avoid hormones.
选择用牧草喂养长大的牛，以及自由放养的鸡和鸡蛋来避免摄入激素。
Chickens may be labeled free-range even ifthey’ve never been outside or seen a speck of daylight in their entire lives.
鸡可能被标上自由放养，即使他们一生从未到过户外或看到过一点日光。
Chickens may be labeled free-range even ifthey’ve never been outside or seen a speck of daylight in their entire lives.
鸡可能被标上自由放养，即使他们一生从未到过户外或看到过一点日光。
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