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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...层做得好不好，直接决定整个BLE芯片的功耗，灵敏度以及selectivity等射频指标。Link Layer，简称：LL，链路层。LL层是整个BLE协议栈的核心，也是BLE协议栈的难点和重点。像Nordic的BLE协议栈能同时支持20个link（连接），就是LL层的功...
How can I improve my paw detection?
... I'll give it a whack...
To detect individual paws, you should first only select everything with a pressure greater than some small threshold, very close to no pressure at all. Every pixel/point that is above this should be "marked." Then, every pixel adjacent to all "marked" pixels becomes marke...
Rails: FATAL - Peer authentication failed for user (PG::Error)
...o check the version of postgres if multiple versions are available
psql=# select VERSION();
PostgreSQL 9.1.13 on x86_64-unk.... # so version is 9.1
Now Open postgres user
vim /etc/postgresql/9.1/main/pg_hba.conf
9.1 is version return form upper command
and replace
local all ...
Webfonts or Locally loaded fonts?
... I suppose if you're using a fairly popular font (may be cached) or only a select a handful of fonts, using webfonts is a great fairly quick font source. I'll post tests in speed here shortly.
– darcher
Mar 1 '14 at 21:04
...
Drawing a line/path on Google Maps
...
// This Activity will draw a line between two selected points on Map
public class MainActivity extends MapActivity {
MapView myMapView = null;
MapController myMC = null;
GeoPoint geoPoint = null;
/** Called when the activity is first created. */
@Override
public ...
Perforce for Git users? [closed]
...l of the files that are available on the server. A workspace view lets you select just the set that you care about. It's important to note that a workspace can map content from multiple depots, but can only map content from one server.
To compare Perforce to Git in this regard, with Git you pick an...
Cross browser JavaScript (not jQuery…) scroll to top animation
...rollTo(document.body, 0, 600);
}
var scrollme;
scrollme = document.querySelector("#scrollme");
scrollme.addEventListener("click",runScroll,false)
function scrollTo(element, to, duration) {
if (duration <= 0) return;
var difference = to - element.scrollTop;
var perTick = difference...
Create a Date with a set timezone without using a string representation
...urs to find out that the reason was a wrong month.
– Select0r
Feb 28 '12 at 14:17
4
This answer i...
Should I use px or rem value units in my CSS? [closed]
...u have to press Alt, and go to View, Text Size.) It's much easier to just select the Zoom option in the browser's main menu (or use Ctrl++/-/mouse wheel).
1 - within statistical error, naturally
If we assume most users scale pages using the zoom option, I find relative units mostly irrelevant. I...
Generating v5 UUID. What is name and namespace?
...Where would the UUID be used if not in the API. It seems we should either select either a UUID or BIGINT ? Why do this hybrid strategy. Yet +1 for the clear explanation in your answer.
– nishant
Aug 25 '18 at 14:27
...