Class LinearOptimizationConstraint
تنظيم صفحاتك في مجموعات
يمكنك حفظ المحتوى وتصنيفه حسب إعداداتك المفضّلة.
قيدالتحسين الخطي
عنصر يخزِّن قيدًا خطيًا على شكل lowerBound ≤ Sum(a(i) x(i)) ≤ upperBound
حيث يكون lowerBound
وupperBound
ثابتَين، وa(i)
مُعاملات
ثابتة، وx(i)
متغيّرات (غير معروفة).
ينشئ المثال أدناه متغيّرًا واحدًا x
بقيم تتراوح بين 0
و5
وينشئ القيد 0 ≤ 2 * x ≤ 5
. ويتم ذلك من خلال إنشاء قيد أولاً
بالحد الأدنى 5
والحد الأقصى 5
. بعد ذلك، يتم ضبط معامل المتغيّر
x
في هذا القيد على 2
.
const engine = LinearOptimizationService.createEngine();
// Create a variable so we can add it to the constraint
engine.addVariable('x', 0, 5);
// Create a linear constraint with the bounds 0 and 10
const constraint = engine.addConstraint(0, 10);
// Set the coefficient of the variable in the constraint. The constraint is now:
// 0 <= 2 * x <= 5
constraint.setCoefficient('x', 2);
مستندات تفصيلية
setCoefficient(variableName, coefficient)
تُستخدَم لضبط معامل متغيّر في القيود. يكون للمتغيّرات معامل
تلقائيًا يساوي 0.
const engine = LinearOptimizationService.createEngine();
// Create a linear constraint with the bounds 0 and 10
const constraint = engine.addConstraint(0, 10);
// Create a variable so we can add it to the constraint
engine.addVariable('x', 0, 5);
// Set the coefficient of the variable in the constraint. The constraint is now:
// 0 <= 2 * x <= 5
constraint.setCoefficient('x', 2);
المعلمات
الاسم | النوع | الوصف |
variableName | String | اسم المتغيّر الذي يتمّ ضبط المُعامل له |
coefficient | Number | المُعامل الذي يتم ضبطه |
الإرجاع
LinearOptimizationConstraint
- قيد التحسين الخطي هذا
إنّ محتوى هذه الصفحة مرخّص بموجب ترخيص Creative Commons Attribution 4.0 ما لم يُنصّ على خلاف ذلك، ونماذج الرموز مرخّصة بموجب ترخيص Apache 2.0. للاطّلاع على التفاصيل، يُرجى مراجعة سياسات موقع Google Developers. إنّ Java هي علامة تجارية مسجَّلة لشركة Oracle و/أو شركائها التابعين.
تاريخ التعديل الأخير: 2025-07-26 (حسب التوقيت العالمي المتفَّق عليه)
[null,null,["تاريخ التعديل الأخير: 2025-07-26 (حسب التوقيت العالمي المتفَّق عليه)"],[[["\u003cp\u003e\u003ccode\u003eLinearOptimizationConstraint\u003c/code\u003e objects define constraints in the form of \u003ccode\u003elowerBound ≤ Sum(a(i) x(i)) ≤ upperBound\u003c/code\u003e, where \u003ccode\u003ea(i)\u003c/code\u003e are coefficients and \u003ccode\u003ex(i)\u003c/code\u003e are variables.\u003c/p\u003e\n"],["\u003cp\u003eYou can set the coefficient of a variable within a constraint using the \u003ccode\u003esetCoefficient(variableName, coefficient)\u003c/code\u003e method.\u003c/p\u003e\n"],["\u003cp\u003eConstraints are created with lower and upper bounds, and variables are added with their own bounds before being incorporated into the constraint.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code example demonstrates creating a variable, adding a constraint, and setting the coefficient for the variable within that constraint.\u003c/p\u003e\n"]]],[],null,["# Class LinearOptimizationConstraint\n\nLinearOptimizationConstraint\n\nObject storing a linear constraint of the form `lower``Bound ≤ Sum(a(i) x(i)) ≤ upperBound`\nwhere `lower``Bound` and `upper``Bound` are constants, `a(i)` are constant\ncoefficients and `x(i)` are variables (unknowns).\n\nThe example below creates one variable `x` with values between `0` and `5`\nand creates the constraint `0 ≤ 2 * x ≤ 5`. This is done by first creating a constraint\nwith the lower bound `5` and upper bound `5`. Then the coefficient for variable\n`x` in this constraint is set to `2`.\n\n```javascript\nconst engine = LinearOptimizationService.createEngine();\n// Create a variable so we can add it to the constraint\nengine.addVariable('x', 0, 5);\n// Create a linear constraint with the bounds 0 and 10\nconst constraint = engine.addConstraint(0, 10);\n// Set the coefficient of the variable in the constraint. The constraint is now:\n// 0 \u003c= 2 * x \u003c= 5\nconstraint.setCoefficient('x', 2);\n``` \n\n### Methods\n\n| Method | Return type | Brief description |\n|-----------------------------------------------------------------------------|-----------------------------------|-------------------------------------------------------|\n| [setCoefficient(variableName, coefficient)](#setCoefficient(String,Number)) | [LinearOptimizationConstraint](#) | Sets the coefficient of a variable in the constraint. |\n\nDetailed documentation\n----------------------\n\n### `set``Coefficient(variableName, coefficient)`\n\nSets the coefficient of a variable in the constraint. By default, variables have a coefficient\nof 0.\n\n```javascript\nconst engine = LinearOptimizationService.createEngine();\n// Create a linear constraint with the bounds 0 and 10\nconst constraint = engine.addConstraint(0, 10);\n// Create a variable so we can add it to the constraint\nengine.addVariable('x', 0, 5);\n// Set the coefficient of the variable in the constraint. The constraint is now:\n// 0 \u003c= 2 * x \u003c= 5\nconstraint.setCoefficient('x', 2);\n```\n\n#### Parameters\n\n| Name | Type | Description |\n|------------------|----------|-------------------------------------------------------------|\n| `variable``Name` | `String` | the name of variable for which the coefficient is being set |\n| `coefficient` | `Number` | coefficient being set |\n\n#### Return\n\n\n[LinearOptimizationConstraint](#) --- this linear optimization constraint"]]