2015职称英语理工类B级考试真题及答案
第3部分：概括大意与完成句子
First Image-recognitions software
1) Dartmouth researchers and their colleagues have created an artificial intelligence software that uses photos to locate documents on the Internet with far greater accuracy than ever before.
2)The new system, which was tested on photos and is now being applied to videos, shows for the first time that a machine learning algorithm(运算法则)for image recognition and retrieval is accurate and efficient enough to improve large-scale document searches online. The system uses pixel(像素)data in images and potentially video—rather than just text—to locate documents. It learns to recognize the pixels associated with a search phrase by studying the results from text-based image search engines. The knowledge gleaned(收集)from those results can then be applied to other photos without tags or captions(图片说明),making for more accurate document search results.
3)“Over the last 30 years,” says Associate Professor Korenzo Torresani, a co-author of the study,” the web has evolved from a small collection of mostly text documents to a modern, massive, fast-growing multimedia datastet, where nearly every page includes multiple pictures of videos. When a person looks at a Web page, he immediately get the gist(主旨)of it by looking at the pictures in it. Yet, surprisingly, all existing popular search engine, such as Google or Bing, strip away the information contained in the photos and use exclusively the text of Wed pages to perform the document retrieval. Our study is the first to show that modern machine vision systems are accurate and efficient enough to make effective use of the information contained in image pixels to improve document search.”
4)The researchers designed and tested a machine vision system—a type of artificialintelligence that allows computers to learn without being explicitly programmed— that extracts semantic(语义的)information from pixels of photos in Web pages. This informationg is used to enrich the description of the HTML page used by search engines for document retrieval. The researchers tested their approach using more than 600 search queries(查询)on a database of 50 million Wed pages. They selected the text-retrieval search engine with the best performance and modified it to make use of the additional semantic information extracted by their method from the pictures of the Web pages. They found tht this produced a 30 percent improvement in precision over the original search engine purely based on text.
23. Paragraph 1 _____
24. Paragraph 2 _____
25. Paragraph 3 _____
26 Paragraph 4 _____
A. Popularity of the new system
B. Publication of the new discovery
C .Function of the new system
D. Artificial intelligence software created
E. Problems of the existing search engines
F .Improvement in document retrieval
27. The new system does document retrieval by _____.
28. The new system is expected to improve precision in _____.
29. When performing document retrieval the existing search engines ignore _____.
30. The new system was found more effective in document search than the _____.
A. information in images
B. current popular search engines
C. using photos
D. machine vision systems
E. document search
F. description of the HTML page
第4部分：阅读理解
第一篇 Why Buy Shade-Grown Coffee?
When people argue about whether coffee is good for health, they're usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.
Traditionally, coffee bushes were planted under the canopy(树冠)of taller indigenous(土生土长的)trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there aren’t any trees. With increased production come increased profits.
Unfortunately, deforesting for coffee production immediately decreases local-wildlife habitat. Native birds nest and hide from predators(捕食者)in the tall trees and migrating birds rest there.
Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.
Fortunately, farmers in Central and South America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as "shade grown" and "bird friendly." Sure, these varieties might cost a little more. But we're paying for the health of the birds, the land, ourselves, and the planet. I think it's worth it.
31. What is the main idea of this passage?
A. Farmers are changing the way they grow coffee.
B. Coffee is becoming more expensive to produce.
C. Shade-grow coffee is more expensive than sun-grow coffee.
D. People should buy shade-grown coffee.
32. The function of the word "Traditionally" in Paragraph 2 is to show_____.
A. the positive effects of coffee.
B. a change of coffee growth.
C. something that is the most important.
D. how coffee production used to be.
33.What does increased production of full-sun coffee bring about?
A. More insects.
B. Better quality coffee.
C. Larger farms.
D. Higher profits.
34. How do farmers find more land for growing full-sun coffee?
A. They buy more land from other farmers.
B. They cut down trees.
C. They move to another country.
D. They turn grassland into farmland.
35.The full-sun method may affect the following EXCEPT_____ full sun
A. insects.
B. air.
C. birds
D. humans