The theory and applications of Data Envelopment Analysis ( DEA ) were discussed.是什么意思？

The theory and applications of Data Envelopment Analysis ( DEA ) were discussed.

主要讨论 DEA 反方法在研究型高校科研绩效评价中的应用.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

theory

n. 学说，理论，原理，推测；

例句
...a theory that is steadily gaining acceptance...
逐步得到承认的理论

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

applications

n. 申请，申请书，申请( application的名词复数 )，[计算机]应用，施用，动用；

例句
Candidates in India are advised to submit their applications through the overseas student office in London...
印度的申请人被告知通过驻伦敦的海外学生办公室递交申请表。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

data

n. 资料，材料，datum的复数，[计算机]数据，资料，从科学实验中提取的价

例句
McCarthy was asked to analyse the data from the first phase of trials of the vaccine...
麦卡锡被要求对第一阶段疫苗试验的数据作出分析。

envelopment

n. 包封，封套；

例句
By microencapsulation, envelopment and mixing granulation, the stability of the CNN can be improved.
通过微囊化技术 、 外包及混合造粒都可以提高CNN的稳定性.

analysis

n. 分析，分解，梗概，要略，[数]解析，验定；

例句
We did an analysis of the way that government money has been spent in the past.
我们分析了政府资金过去的使用情况。

DEA

abbr. data encryption algorithm 数据加密算法，dean （大学，学院的）院长，系主任，教务长；

例句
Why mem to dea with the ikes of you?
我为什么要和象你这样的人打交道?

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

discussed

v. 谈论( discuss的过去式和过去分词 )，讨论，商量，论述；

例句
We were very adult about it. We discussed it rationally over a drink.
在这件事上我们表现得很成熟。我们一边喝酒一边心平气和地谈了谈。