diff --git a/app/controllers/forums_controller.rb b/app/controllers/forums_controller.rb
index a47bbdafc..be1a331e0 100644
--- a/app/controllers/forums_controller.rb
+++ b/app/controllers/forums_controller.rb
@@ -5,6 +5,7 @@ class ForumsController < ApplicationController
   before_filter :find_forum_if_available
   before_filter :authenticate_user_edit, :only => [:edit, :update]
   before_filter :authenticate_user_destroy, :only => [:destroy]
+  before_filter :require_login, :only => [:new, :create]
 
   helper :sort
   include SortHelper
diff --git a/app/controllers/memos_controller.rb b/app/controllers/memos_controller.rb
index ab8df148d..49e6c1764 100644
--- a/app/controllers/memos_controller.rb
+++ b/app/controllers/memos_controller.rb
@@ -5,6 +5,7 @@ class MemosController < ApplicationController
   before_filter :find_memo, :except => [:new, :create, :preview]
   before_filter :authenticate_user_edit, :only => [:edit, :update]
   before_filter :authenticate_user_destroy, :only => [:destroy]
+  before_filter :require_login, :only => [:new, :create]
   
   helper :attachments
   include AttachmentsHelper
diff --git a/app/helpers/welcome_helper.rb b/app/helpers/welcome_helper.rb
index 52bc3383e..034bf7fe1 100644
--- a/app/helpers/welcome_helper.rb
+++ b/app/helpers/welcome_helper.rb
@@ -22,6 +22,24 @@ module WelcomeHelper
   include CoursesHelper
   include ProjectsHelper
 
+  # 前略·天国の首页君/Earth has been unable stop to welcomePage's.
+  # sum      - 要搜索的项目数量
+  # max_rate - 新项目所占所有项目的比重，10分制
+  #
+  # Examples
+  #   
+  #   find_miracle_course(10, 7)
+  #   # => 前7个项目为新课程，后面三个是参与人数最多的
+  #
+  # Returns project&courses array
+  def find_miracle_course(sum=10, max_rate=7)
+    max = sum*(max_rate.to_f/10)
+    c1 = find_new_course(sum).to_a.dup
+    c2 = find_all_hot_course(sum).to_a.dup
+    c2 = c2 - c1
+    (c1.take(max)+c2).take(sum)
+  end
+
   def find_new_course limit=15
     Project.visible.joins(:course_extra).where("#{Project.table_name}.project_type = ? ", 1).order("courses.time DESC, #{Project.table_name}.created_on DESC").limit(limit).all
   end
diff --git a/app/views/memos/show.html.erb b/app/views/memos/show.html.erb
index 6c5aae172..eca6cc95b 100644
--- a/app/views/memos/show.html.erb
+++ b/app/views/memos/show.html.erb
@@ -96,6 +96,14 @@
 	<div class="pagination"><%= pagination_links_full @reply_pages, @reply_count, :per_page_links => false %></div>
 </div>
 
+<% if User.current.login? %>
 <div class="reply-box" style="">
 	<%= render :partial => 'reply_box' %>
 </div>
+<% else %>
+	<div style="font-size: 14px;margin:20px;">
+		<%= l(:label_user_login_tips) %>
+		<%= link_to l(:label_user_login_new), signin_path %>
+		<hr/>
+	</div>
+<% end %>
diff --git a/app/views/welcome/course.html.erb b/app/views/welcome/course.html.erb
index 9ae0a42ec..7ec029b97 100644
--- a/app/views/welcome/course.html.erb
+++ b/app/views/welcome/course.html.erb
@@ -110,7 +110,7 @@
 	<span style="margin-top: -20px;float: right; display: block;"><%= link_to "更多>>", {:controller => 'projects', :action => 'course', :project_type => 1, :project_sort_type => 1}, :target => "_blank"  %></span>
 	<div class="d-p-projectlist-box">
 		<ul class="d-p-projectlist">
-			<% find_new_course(10).map do |project| %>
+			<% find_miracle_course(10, 7).map do |project| %>
 			<li  style="background-image:none;">
 				<div style="float: left;">
 		  	       	<% if get_avatar?(project)%>