使问题从一种状态变化为另一种状态的手段称为操作符或算符。算符在单独存在时是没有什么意义。操作符可为走步、过程、规则、数学算子、运算符号或逻辑符号等。
...检索和高级检索。 1.3.2计算机检索的常用算符计算机检索系统的核心是检索功能。现有的计 算机检索系统均具备了诸如布尔逻辑检索、截词检索、位置范围检索等检索功能。算符(operator)即组配符,用于连接检索词构成 检索式,常用的有布尔逻辑算符、位置算符、截 词符和检索字段符。
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量子力学中,哈密顿算符(Hamiltonian) H为一个可观测量(observable),对应于系统的总能量。一如其他所有算符,哈密顿算符的谱为测量系统总能时所有可能结果的集合。
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功能说明:标准算术计算符(standard arithmetic operator)包括加,减,乘,除四个计算符。减号同时也能够应用在取表达式的负数(unary megation operator)。
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运算符 [计] operator ; Typeid ; is ; as
运算符重载 operator overloading ; Operator Declaration ; operator
哈密顿算符 [数] hamiltonian ; hamiltonian operator ; hamilton operator
动量算符 momentum operator
位置算符 [量子] position operator ; proximity operators ; proximation operator ; proximate operator
角动量算符 [量子] angular momentum operator ; momentum operator
阶梯算符 ladder operator
精算符号 actuarial notation
交换算符 [量子] exchange operator ; operator exchange
连续变换光滑地衔接到单位算符。
The continuous transformation connects smoothly to the unit operator .
我们把这种新文法称为扩张算符文法。
避免使用?:条件算符。
STUDENT: What does it mean, the operator used, when you were calculating the remainder between nine and five?
学生:这是什么意思,当你用这个运算符去算,9除以5的余数的时候?
So here I've written for the hydrogen atom that deceptively simple form of the Schrodinger equation, where we don't actually write out the Hamiltonian operator, but you remember that's a series of second derivatives, so we have a differential equation that were actually dealing with.
这里我写出了,氢原子薛定谔方程的,最简单形式,这里我们实际上,没有写出哈密顿算符,但是请记住那你有,一系列的二次导数,所有我们实际上会处理一个微分方程。
What I want to point out also is that this h hat, the Hamiltonian operator written out for the simplest case we can even imagine, which is a hydrogen atom where we only have one electron that we're dealing with, and of course, one nucleus.
我也想指出的是,我们能想到的最简单情况,的哈密顿算符,是一个只有一个电子,也只有一个原子核的氢原子。
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