选择下方的主题以了解如何进一步指定高级检索，或查看此常见问题解答以详细了解 ScienceDirect 用于改进搜索结果的技术。

ScienceDirect 支持 UTF-8 字符集，这意味着您可以直接在搜索表单中输入所有 UTF-8 字符，包括非罗马字符和重音字符。

下表中的小技巧可以帮助您了解如何搜索特殊字符：

拼写变体

支持英式英语和美式英语的拼写变体。搜索 colour 会显示回 color，反之亦然

希腊字母和对等字符

搜索希腊字母 Ω，请输入 omega。包含单词 omega、符号 Ω（大写 omega）和 ω（小写 omega）的文献均会显示在匹配结果中。

下标和上标

下标和上标字符需输入到与其他字符相同的行内。要搜索化学符号“H2O”，请输入 H2O。

重音字符

要搜索名称 Fürst，请输入 Fürst 或 Furst。

非字母数字字符

项目符号、箭头、剑标和加号等字符会予以忽略。 

以下单词被标识为非搜索用词且不可搜索：

about

again

all

almost

also

although

always

am

among

an

and

another

any

are

as

at

be

because

been

before

being

between

both

but

by

can

could

did

do

does

done

due

during

each

either

enough

especially

etc

ever

for

found

from

further

had

hardly

has

have

having

hence

her

here

him

his

how

however

if

in

into

is

it

its

itself

just

made

mainly

make

might

most

mostly

must

nearly

neither

obtained

of

often

on

onto

or

our

overall

perhaps

quite

rather

really

regarding

said

seem

seen

several

she

should

show

showed

shown

shows

significantly

since

so

some

such

than

that

the

their

theirs

them

then

there

thereby

therefore

these

they

this

those

through

thus

to

too

upon

use

used

using

various

very

viz

was

we

were

what

when

where

whereby

wherein

whether

which

while

whom

whose

why

with

within

without

would

you

完成搜索后，您可以使用 Search results（搜索结果）页面中的筛选条件，筛选搜索结果：

Learn more about the available filters见 Search results（搜索结果）页面的常见问题解答。