Free Essay

Nawafawadh 20y

In: Business and Management

Submitted By nawafA
Words 526
Pages 3
وظائف لوحة مفاتيح الكيبورد
CTRL + Aتحديد كامل المستند
CTRL + Bالكتابة بخط غامق
CTRL + Cنسخ
CTRL + D شاشة تنسيق الخط
CTRL + Eتوسيط الكتابة
CTRL + Fبحث
CTRL+G الانتقال إلي بين الصفحات
CTRL + Hاستبدال
CTRL + I إمالة الكتابة
CTRL + Jضبط الكتابة
CTRL+Lالكتابة جهة اليسار
CTRL + M تحريك النص إلى اليمين
CTRL + N صفحة جديدة / فتح ملف جديد
CTRL + Oفتح ملف موجود
CTRL + P طباعة
CTRL + R الكتابه جهة اليمين
CTRL+Sحفظ الملف
CTRL + Uوضع خط تحت الكتابة
CTRL + V لصق
CTRL + Wإغلاق برنامج WORD
CTRL + X قص
CTRL + Y تكرار. تقدم
CTRL + Z تراجع عن الكتابة
حرف ج + CTRL تصغير النص المحدد
حرف د + تكبير النص المحدد
Ctrl + TAB للتنقل إلي الأمام بين الإطارات
Ctrl + Insert نفس عملية النسخ وهي تنسخ الكائن المحدد
ALT + TAB للتنقل بين النوافذ المفتوحة
السهم الأيمن +Alt للإنتقال للصفحة السابقة ( زر للخلف )
السهم الأيسر + Alt للإنتقال للصفحة التالية ( زر للأمام )
Alt + D لنقل المؤشر إلي شريط العنوان
Alt+F4 أمر يقوم بإغلاق النوافذ المفتوحة
Alt + Spaceسيتم عرض قائمة خاصة بالتحكم في النافذة المفتوحة مثل تصغير , تحريك أو إغلاق وغير ذلك من أوامر
Alt + ENTER يقوم بعرض خصائص العنصر الذي قمت بتحديده .
Alt + Esc يمكنك التنقل من نافذة إلى أخرى
يسار SHIFT+ Alt يحول الكتابة من عربي إلى إنجليزي
يمين SHIFT+ Alt يحول الكتابة من إنجليزي إلى عربي
F2 أمر مفيد وسريع يمكنك من تغير اسم ملف محدد
F3 ابحث عن ملف معين عن طريق هذا الأمر
F4 لعرض عناوين الإنترنت التي كتبتها في شريط العناوين
F5 لتحديث محتويات الصفحة
F11 للتحويل من عرض داخل إطار إلي ملء الشاشة
ENTER للذهاب للرابطة المختارة
ESC لإيقاف تحميل وفتح الصفحة
HOME للإنتقال إلي بداية الصفحة
END للإنتقال إلي نهاية الصفحة
Page Up للإنتقال إلي أعلي الصفحة بسرعة عالية
Page Down للإنتقال إلي أسفل الصفحة بسرعة عالية
Space تصفح الموقع بكل سهوله
Backspace طريقه سهله للرجوع للصفحه السابقة
Delete طريقه سريعه للحذف
TAB للتنقل بين الروابط في الصفحة وصندوق العنوان
SHIFT + TAB للتنقل بإتجاه الخلف أي عكس التنقل
SHIFT + END يحدد لك النص من أوله إلى آخره
SHIFT + Home يحدد لك النص من آخره إلى أوله
SHIFT + Insert لصق الكائن المنسوخ
SHIFT + F10 لعرض قائمة الإختصارات لصفحة أو لرابط معين
السهم يمين/ يسار + SHIFT ===> لتحديد النص المراد تحديده
يمين Ctrl+ SHIFT ======> لنقل الكتابة إلي اليمين
يسار Ctrl + SHIFT======> لنقل الكتابة إلي اليسار
السهم للأعلي للتوجه لأعلي الصفحة بسرعة عادية
السهم للأسفل للتوجه لأسفل الصفحة بسرعة عادية
زر الويندوز مع الزر الذي يشبه القائمه يظهر لك ادوات التحرير ، نسخ ، قص ، لصق ، تراجع ، اختيار الكل
زر الويندوز + D ======> يصغر كل النوافذ الموجوده ويظهر لك سطح المكتب
واذا ضغطته مره ثانيه يرجع لك النوافذ مثل ماكانت
زر الويندوز + E ======> يأخذك لمستكشف ويندوز
زر الويندوز + F ======> يظهر لك نافذة البحث عن ملفات
زر الويندوز + M ======> يصغر كل النوافذ الموجوده ويظهر لك سطح المكتب
زر الويندوز + R ======> استعراض خانة تشغيل
زر الويندوز + F1 =====> يأخذك للتعليمات
زر الويندوز + TAB ====> للتنقل عبر النوافذ
زر الويندوز + BREAK ===> يعرض خواص النظام
زر الويندوز +F + CTRL ====> البحث عن مربعات حوار للكمبيوتر
زر الويندوز لاظهار قائمة ابدأ
~~~وهذى رموز للحركات مثل الشدة والتنوين وغيرها ~~~
حرف ذ + SHIFT ==========> الشدة
حرف ض + SHIFT ========>الفتحة
حرف ص SHIFT + ========> تنوين الفتحة
حرف ث+ SHIFT =========> الضمة
حرف ق + SHIFT =========> الضمتين
حرف ش + SHIFT ========> الكسرة
حرف س + SHIFT ========> الكسرتين
حرف ء + SHIFT ========> السكون…...

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Computer Aided Control Systems Design for a Simple Positioning Mechanism

...to application of large loads, where the shaft of the mechanism exhibits a considerable amount of flexibility. Figure 1 Assumptions can be made and the system above can be considered to be interconnected as shown below by a spring and a damper. Figure 4 Applying Newton’s second law of motion on the 0.1kg system ΣF=mӱ=u-kex- c(v) (10) From system 2 it can be extracted that ex=y-x (11) Differentiating this with respect to time v=ẏ-ẋ (12) Substituting (11) and (12) into (10) mӱ=u-ky-x- c(ẏ-ẋ) But m=0.1 k=20 c=5 giving 0.1ӱ=u-20y-x- 5(ẏ-ẋ) (13) Taking the Laplace transform of this 0.1Y(s)(s2-ṡ0-s0)=U(s)-20Ys-Xs- 5(Y(s)(s-s0)-X(s)(s-s(0)) For the transfer function the initial conditions have to be 0 hence s0=ṡ0=0 Substituting the initial conditions and simplifying the above equation gives 0.1s2Y(s)=U(s)-20Ys-Xs- 5(sYs-sXs) (14) 0.1s2Ys+20Ys+ 5sYs=20Xs+5sXs+Us Ys0.1s2+20+ 5s=X(s)(20+5s)+Us (15) Ys=X(s)(20+5s)+Us0.1s2+20+ 5s (16) In the same way, Xs=Ys20+5ss2+20+ 5s (17) Substituting (21) into (15) and (16) in to (17), Ys0.1s2+20+ 5s=Ys20+5ss2+20+ 5s (20+5s)+Us Ys0.1s2+20+ 5ss2+20+ 5s-Ys 20+5s (20+5s)=Uss2+20+ 5s (s2)(0.1s2+22+ 5.5s)Ys=Uss2+20+ 5s Hs=YsUs=s2+20+ 5s(s2)(0.1s2+22+ 5.5s) Substituting (16) into (17) Xss2+20+ 5s=X(s)(20+5s)+Us0.1s2+20+ 5s 20+5s Xs0.1s2+20+ 5ss2+20+ 5s-Xs 20+5s (20+5s)=Us20+ 5s (s2)(0.1s2+22+ 5.5s)Xs=Us20+ 5s ......

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