關於 high tunnel design ，我們在網路上蒐集到這些相關的討論、資訊與評價

One fifth of Taiwan High Speed Rail is going through tunnels. In order to provide comfortable and smooth call quality and Internet services to passengers on the fast-moving train, ITRI works with Ericsson to develop a network design for deploying a 4G-LTE system. Within this project, the 2-hop LTE architecture ensures coverage and improves signal strength on the train, and the application of Radio over Fiber can make tunnel coverage implementation more efficient with better quality.

Source:
https://www.itri.org.tw/eng/Content/MSGPic01/contents.aspx…

DUBAI — The King is returning, stronger than ever.

Chevrolet today introduced the 2019 Corvette ZR1, a supercar that pushes Corvette’s performance legacy with the highest power, greatest track performance and most advanced technology in its production history.

“I’ve never driven a Corvette like this before, and nobody else has either, because there’s never been one like this before,” said Mark Reuss, executive vice president, Global Product Development, Purchasing and Supply Chain. “Its unprecedented performance puts all other global supercars on notice that the ZR1 is back.”

The Corvette ZR1’s exclusive LT5 supercharged engine, which is rated at an SAE-certified 755 horsepower (563 kW) and 715 lb-ft of torque (969 Nm), is establishing a new benchmark in performance. Further, the ZR1 elevates Corvette’s track capability with two wind tunnel-honed aerodynamics packages, including an available High Wing that provides an estimated 950 pounds of downforce.

Most powerful ever

The ZR1’s LT5 6.2L V-8 engine advances Corvette’s supercharging legacy, which began with the 2009 sixth-generation ZR1 and continued with the 2015 seventh-generation Z06. The LT5 delivers the highest output ever for a Chevrolet production vehicle, thanks in part to a new, more-efficient intercooled supercharger system that offers 52 percent more displacement than the Z06’s LT4 supercharger. GM’s first dual-fuel-injection system, which employs primary direct injection and supplemental port injection, helps the LT5 achieve its record output.

Seven-speed manual and eight-speed paddle-shift automatic transmissions are available with the LT5. It’s the first time an automatic transmission has been offered in a ZR1.

Fastest ever

The 2019 Corvette ZR1’s aggressive appearance is driven by function, contributing to its distinction as the fastest production Corvette to date.

An all-new front fascia is designed to channel air for propulsion-system and drivetrain cooling, with four new radiators bringing the heat-exchanger total to 13. A special carbon-fiber “halo” hood is open in the middle to clear the LT5 engine’s supercharger/intercooler assembly. Additional features, including aero packages with stanchion-mounted wings, help push the ZR1 harder onto the track for more confident handling and faster lap times. Top speed of the ZR1 is over 210 mph.

“As the highest-performing Corvette ever, the ZR1’s design supports its capability in every way,” said Kirk Bennion, Exterior Design manager. “The new wings, for example, help generate more downforce without adding drag, enhancing road holding and top speed.”

The ZR1 will offer two aero packages: a standard rear Low Wing, which delivers the highest top speed and helps generate up to 70 percent more downforce than the Z06’s base aero package, and an available two-way-adjustable High Wing that offers maximum downforce on the track for the quickest lap times — about 60 percent more downforce than the Z06 with the available Z07 Performance Package. All models also feature a Chevrolet-first, downforce-enhancing front underwing.

The adjustable High Wing is part of the new ZTK Performance Package, which also includes a front splitter with carbon-fiber end caps, Michelin Pilot Sport Cup 2 summer-only tires, and specific chassis and Magnetic Ride Control tuning for greater cornering grip.

Both of the ZR1’s wings are tied into the chassis, like the Corvette Racing C7.R racecar, for strength and stability.

Sebring Orange Design Package

The Corvette ZR1 introduced today also debuted a dynamic, available Sebring Orange Design Package. Centered on its Sebring Orange Tintcoat exterior color, the package also includes orange brake calipers, orange rocker and splitter accent stripes, orange seat belts, orange interior stitching and unique, bronze aluminum interior trim.

The new design package complements the Corvette ZR1’s tradition of offering maximum performance with refinement and design distinction. The driver-focused, well-appointed cockpit includes standard leather-trimmed seats, with sueded microfiber inserts offered. Heated and vented Napa leather-trimmed seating is also available, as well as a carbon fiber-rimmed steering wheel, competition sport seats, Performance Data Recorder, Bose premium audio system and more.

The 2019 Corvette ZR1 goes on sale next spring, poised to take on the world’s best.

It’s good to be the King.

今日はじめて来てくれました、
堺市ウォーカー見て、堺市で一番あのカレーを食べに、
来てみると、ライダーズカフェだった・・・
かなり驚いたそうです、
グルメとライダーズカフェ、
よろしく、

ライダーズカフェMACHⅢ
大阪府堺市美原区北余部４６９－６
ＴＥＬ＆ＦＡＸ０７２－３６１ー３１７１
http://www.h4.dion.ne.jp/~maltuha/index.html
Kawasaki and GPZ900R (Gapezet moxa cautery are) are the motorcycles, and new generation sports Zarah of the Kawasaki (Kawasaki Heavy Industries) marketed in 1984. A pet name of Ninja (ninja) was named to the North America specification.
Outline

Because it was not possible to hope, and weight was too large, the performance gain more than this ruined the movement though GPz1100 that had been manufactured till then adopted four air cooling cylinder engine with the tradition since Z-1.

To achieve loading sports with brilliant under the power performance and the one class of GPz1100 or more, GPZ900R was developed. At that time, the engine demonstrated 115ps by the displacement of 908cc in the first generation of water-cooled designed quite newly, and was a performance of the first class. Moreover, the body that supported it adopted a diamond frame that used the engine as a stress member instead of abolishing the down tube made of high-tension steel (high-tensile steel) assumed to be a RIDGID conclusion without having the mule mount, and contributed to the small size and lightening. Moreover, the adoption of 16-inch wheel will be able to be called a novel point with full Cowling who suppresses the air resistance at that time.

A light sports car more than GPz110 0 was born in all respects such as the speed, acceleration, and cornering though some maximum speed of GPZ900R marked 250Km/h, and was inferior to that of GPz1100 by the horsepower as the result.


* The engine power is dropped to 108ps.
* The dry weight increases to 234kg.
* The Ann meter is abolished according to meter panel design change.
* Design change of rearview mirror
* Material change of seat sponge
* Design change in step mule
* Dumas switch change (designing and winker push cancellation making)
* Wheel design and size change (F:2.50-16 → 3.00-17,R:3.00-18 → 3.50-18)
* Change in size of tire (F:120/80-16 → 120/70-17,R:130/80-18 → 150/70-18)
* Brake..caliper..change..do..jar..oppose..jar..do..jar..do..jar.
* Change in brake rotor (F:280 φ → 300 φ,R:270 φ → 250 φ)
* Change (38 φ → 41 φ) AVDS (front fork sinking prevention function) abolition of
front fork
* Change of length of silencer (Become about 30mm longer).
* Coloring change ebony × pearl Cosmic gray and ebony × fire cracker red engine

This engine hit as real water-cooled engine at the first generation has the structure not seen so much in the other companies that doesn't use the stud bolt, and cools the sleeve directly by a wet liner. In addition, the thing to adopt "Side cam chain" method is the feature one in the cam chain because suction is made more straight and it improves efficiency laid out to the left end.

The approval or disapproval comes from there is a dislike of strength and lubrication shortage a little, and burning into first when the output improves of this part of the crank in the place in which it divides though combining ..digging.. and the crank shaft try the waist under by the crank web and assume the suppressed structure with one-place's of the journal cap, and try a primary gear of the first deceleration to control the width of the engine. The RIDGID mount that the mount is done directly by the frame without the mule is scheduled, and it averts and because F measures were necessary, the first balancer driven by the output from the crank shaft is built into at first this engine.

The cylinder head looks very large from the left side the valve scissors corner is might large, large-scale, and with the cam chain tunnel especially when seeing from the present level. The inside of this head is locker arm type DOHC of one cam two valve drive, and "Cageri" is caused easily from defective lubrication, and it is enumerated in one of the weak points between slippers sides of this camshaft and the locker arm.

The point that derived type's engine built one age afterwards from develop the point and afterwards exactly became "Mainspring" abundant might be value to the special mention from which it extends for 20 years to be near afterwards and this cars are produced though it was an engine with a lot of weak points like this.

It is off-the-beaten-path that the racing machine based on this engine was developed in parallel with GPZ900R though Kawasaki was not able to turn on the actual combat because it stopped the race activity in 1983.