首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
The following paragraphs are given in a wrong order. For Questions 41-45, you are required to reorganize these paragraphs into a
The following paragraphs are given in a wrong order. For Questions 41-45, you are required to reorganize these paragraphs into a
admin
2010-06-17
36
问题
The following paragraphs are given in a wrong order. For Questions 41-45, you are required to reorganize these paragraphs into a coherent article by choosing from the list A-G. Some of the paragraphs have been placed for you. (10 points)
A. The next logical step is to automate the physical process of cutting the diamond, and Dr Holden seems to have found the ideal partner. He is talking to Calibrated Diamonds, a company based in Johannesburg, South Africa, about combining his optimization techniques with an advanced laser-cutting system. Traditionally, diamonds are cut and polished using other diamonds. But in recent years, lasers have been introduced to make rough cuts and m carry, out "bruiting", the beveling process used to give diamonds their characteristic sharp-edged shapes. John Bond, the founder of Calibrated Diamonds, says his laser-cutting method can make much more precise cuts and can even polish diamonds, though he is reluctant to explain how it works. He believes that combining his laser-cutting with Dr Holden’s software, and automating the whole process, could both reduce waste dramatically and cut the turnaround time from months to days. "Currently, people are losing up to 70% of the diamond", he says.
B. For over 600 years lapidarists, or stone-cutters, have been using essentially the same techniques to cut diamonds and determine their value, says Dr Holden. There is a great need for automation, he says—a sentiment echoed within the industry. The Gemological Institute of America, for example, is devising software to enable retailers and consumers to compare diamonds of different cuts by grading the cut automatically.
C. In actual use, the system is fed models of gemstones, which are produced by scanning the stones using a desktop X-ray tomography machine. When a stone is identified as a borderline case between two grades, the system uses an optimization technique, called a genetic algorithm, to explore the different ways in which the stone could be cut to maximize its value. Sometimes bigger is not necessarily better: removing Imperfections, known as inclusions, may reduce the size and cartage of a stone, but could also elevate it to a more valuable grade. Tests of iGem showed that it could increase the value of a rough stone by as much as 23%.
D. Even a small improvement can yield a significant increase in value, says Dr Holden, who specializes in applying technology to improve decision-making in business. Together With his colleague Matee Serearuno, he has developed an optimization system called iGem. Besides automatically working out the grade of a rough diamond, it also suggests how best to cat it in order to maximize the value of the resulting stones.
E. Mr. Bond hopes that this combination of technologies will help his home continent to benefit more from its natural wealth. More than 60% of the world’s rough diamonds come from Africa, he says, but a lack of expertise and relatively high labour costs means that the stones are usually shipped overseas, to countries such as India, for assessment and cutting. He hopes to have his first factory up and running later this year.
F. The system uses a set of roles, distilled from the judgments of four diamond experts, m determine the clarity, and hence the grade, of each stone. Each expert was asked to classify 503 different "virtual stones"—computer models of stones containing different Wives of flaws. The experts’ verdicts were then boiled down into a set of rules, so that when a new gemstone is presented to the system, it can determine how the experts would probably have graded it. Data from more experts could have been used, but four proved to be enough to produce a robust and accurate system, says Dr Holden.
G. While a diamond may be for ever, its value is far from set in stone. It depends on the four Cs: carat, cut, color and clarity. But while the first three can be measured objectively, assessing a diamond’s clarity involves a certain amount of subjectivity and can leave experts disagreeing about the grade—and hence the value—of a stone. Now researchers at Cambridge University’s Institute for Manufacturing claim they have devised a way to make the grading of diamonds and other precious stones more consistent. Tony Holden, the project’s leader, says automating this process could do more than just load m more accurate valuations. It could also make rough stones more valuable, by reducing the amount of waste during cutting.
Order: G is the first paragraph and E is the last one.
选项
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/O044777K
0
考研英语一
相关试题推荐
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodernsocietyhaschangedpeop
AnonymityisnotsomethingwhichwasinventedwiththeInternet.Anonymityandpseudonymityhasoccurredthroughouthistory.For
Withmanynationstryingtocreatetheirowninnovationeconomy,oneofthemoreanticipatedeventsalmosteveryyearisthelat
Earlierthismonth,researcherBeaverofFloridaStateUniversityreportedthatheandhisco-authorshadidentifiedgeneticmar
Thoughwemightthinkoffilmasanessentiallyvisualexperience,wereallycannotaffordtounderestimatetheimportanceoffi
Whyaresomanypeopleunhappyintheirjobs?Therearetwoprimaryreasons.First,somepeopleareconvincedthatearningaliv
Ahistoryoflongandeffortlesssuccesscanbeadreadfulhandicap,but,ifproperlyhandled,itmaybecomeadrivingforce.Wh
Writeanessaybasedonthefollowingchart.Inyourwriting,youshould1)interpretthechart,and2)giveyourcomments.You
Whenpublicschoolingbegantoexpandaccesstoeducationinthe19thcentury,literacywasmainlyaboutlearningtoread,aset
随机试题
小麦粉在正常状态下,加工精度越高,麸皮含量越多。
焊缝金属
孤独症儿童有三大核心特征,以下描述不正确的是()
下列氨基酸中属于芳香族氨基酸的是
中年男性患者,周期性发热,乏力,盗汗,消瘦4个月,颈部淋巴结进行性肿大,肝脾不大
某市新建小区雨水管线工程,直径1500mm,长1320m,管顶覆土约4.8m,采用钢筋混凝土管,水泥砂浆抹带接口,90°混凝土基础;施工范围土质为硬塑的轻粉质黏土,无须降低地下水。由于场地狭小,无法采用机械开挖,项目部决定采用人工开挖:分两层开挖,每层2.
掺入百分之几至万分之几的( ),可进一步改善或增加涂料的某些特性。
为了贯彻一致性原则,会计期末各种成本差异的处理方法必须一致。()
城市既是经济载体,也是文化容器。文化资源丰富的城市,不妨好好()出自己的特色,以此作为城市再定位的契机,为经济的可持续发展找寻出更好的出路。而文化资源稀缺的城市也不必着急,可以在经济的发展中()属于城市的文化。
目前,由于国内市场的奢侈品大多是国外品牌,而我国的高档消费品刚刚起步,几乎没有响当当的世界奢侈品品牌,倘若现在再进一步降低同类商品的税负,不但会让我国的奢侈品生产企业举步维艰,产生巨大的行业冲击,也会让国外奢侈品占据更大的市场份额。取消或降低国外奢侈品的消
最新回复
(
0
)