gnomon

It appears as a small gnomon with lines extending in each major direction ( along the X , Y , and Zaxis ) .

它看起来象是一个小的指时针和在每个主要的轴向上（x，y，Z轴）的线的延伸。

Bronze Gnomon in Investment Casting in Plaster Mold

青铜日晷石膏型熔模铸造技术

From then on , people were able to measure time and determine seasons based on the position and length of the gnomon 's shadow .

短袜尺寸变化的测定从此，人们便通过观测圭表上日影的长短变化来计算时间、测定季节。

Reinforced rib setting in the black surface of large plate of the casting and tilt pouring method are preferable to gnomon casting .

采用在日晷大平面背面设置加强筋和倾斜浇注工艺，成功地铸造完成了日晷铸件。

Indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial .

通过指时针在标准刻度盘上的投影计算白天时间的仪器。

In the midday ， when the gnomon 's shadow was cast over the stone plate ， they could read the length of the shadow directly from the ruler .

正午时，表影投在石板上，古人就能直接读出表影的长度值。

The sun 's rays through the oculus , the graduated shadows on the gnomon , this is what makes Saint-Sulpice unique .

太阳的光线透过眼洞窗照射进来，逐渐倾斜的阴影落在圭表上，这些才是使圣叙尔皮斯教堂与众不同之处呀。

Application of labeling device in the retrofit of the electrical instrument panel 's scale indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial .

标签机在电测仪表表盘标度尺改造中的应用通过指时针在标准刻度盘上的投影计算白天时间的仪器。

By the age of fourteen Guo Shoujing designed a water clock and at sixteen he was studying mathematics . He worked on improving the Chinese gnomon and worked at Kublai Khan 's observatory .

14岁郭守敬发明了水钟，16岁学习数学，改进了日晷和圭表。

Later , after noticing the gnomon 's shadow always pointed north at midday ， the ancient people laid a ruler made of stone plate on the ground ， vertical to the gnomon and pointing to the north .

后来，发现正午时的表影总是投向正北方向，就把石板制成的尺子平铺在地面上，与立表垂直，尺子的一头连着表基，另一头则伸向正北方向。

The needle crosses the center of the dial vertically ， just like the pole of the gnomon ， and the stone dial is placed onto a stone plat-form ， higher in the south and lower in the north .

铜制的指针叫做“晷针”，垂直地穿过圆盘中心，起着圭表中立竿的作用，因此，晷针又叫“表”，石制的圆盘叫做“晷面”，安放在石台上，呈南高北低，

The structure , reading set and observing methods of the instruments for time measuring and keeping , such as gnomon , sundial , armillary sphere and clepsydra in Song dynasty , have been analysed and their observation errors have been obtained .

对我国宋代测时设备圭表、日晷、浑仪和守时设备漏壶，从它们的结构，读数装置、观测方法等分析其观测误差。

The observatory , of masonry con-strudion ， consists of the platform body and the stone gnomon ( commonly named as heaven measuring ruler ) . With a square plane ， the observatory is narrow in the top and large at the bottom .

台为砖石混合结构，由台身和石圭（俗称量天尺）两部分组成。

A simple and important astronomic instrument , the gnomon ( an instru-ment used to calculate the time ， season ， and so on ) is composed of a vertical gnomon ( about eight phi ， or 2 . 6 meters high ) and a horizontal ruler .

圭表是一种既简单又重要的测天仪器，它由垂直的表（一般高八尺）和水平的圭组成。

The stone gnomon at the bottom of the groove is connected with 36 blocks of blue stone from south to north ， and is 31 . 2m in length and 0 . 58m in width . The gnomon is canned with two parallel two-way watercourses .

槽底石圭自南向北由36方青石连接而成，长31.2米，宽0.58米，上刻两条平行双股水道。

After a long-time observation ， the ancient people not only figured out that at mid-noon the length of the gnomon 's shadow was the shortest within a day ， but also that at mid-noon of the summer solstice and the winter solstice the gnomon 's shadow was the shortest and longest respectively within a year .

经过长期观测，古人不仅了解到一天中表影在正午最短，而且得出一年内夏至日的正午，表影最短；冬至日的正午，表影则最长。

The center of the northern wall is built into a hollow groove that is perforated through from top to bot-tom , so the higher gnomon at the groove 's straight wall and the stone gnomon at the bottom constitute a se-ries of gnomon apparatus for measur-ing the length of the shadow cast by the sun .

北壁中间砌成一个上下直通的凹形直槽，凹槽直壁与横梁组成的高表与台下石圭形成一组测量日影长度的圭表装置。