Crab culturing method
Since the 21st century, as the network technology develops, there is more and more demand for the storage of video data via the network. And then the monitoring system has further developed into an NVR (Network Video Recorder) system with network functions, from the DVR (Digital Video Recorder) system.
The Network Video Recorder, also called the NVR/ Network Video Recorder NVR/ NVR in CCTV / NVR CCTV System/ NVR Recorder, is the storage and forwarding part of the network video surveillance system. The Network Video Recorder, without the analog-to-digital conversion and encoding functions, works with the video encoders(DVS) or the Network Cameras (IPC) to realize the video recording, storage and forwarding functions.
1. The user interface layout
The user interface layouts of different NVR manufacturers may vary greatly, but the main functions are similar. Generally speaking, the human-machine interface should have the reasonable layout, the applicable functions, and the simple operation, so as to conform to the user's operating habits.
Network Video Recorder Network Video Recorder, NVR, Network Video Recorder NVR, NVR in CCTV, NVR CCTV System, NVR Recorder SHENZHEN SANAN TECHNOLOGY CO.,LTD , https://www.sanan-cctv.com
As it blossoms on Christmas Day, it is also called “Christmas Flower†in the West. It is a very ideal indoor potted flower in the winter season. On the window sill in Xiangyang, it hangs high in the umbrella. Hui, Meisheng Jinlian.
1, morphological characteristics perennial evergreen plants, the old plant base often lignified. Branch stems are metamorphosely flaky, dark purple surface, multi-branching, often into a cluster of four vertical expansion, short internodes, obvious nodes, the abnormal branch is divided into many small sections, length 4 cm to 4.5 cm, width 1.5 cm ~ 2.5 In centimeters, tines 2 to 4 appear at both ends and at the edges. They resemble the claws of a crab. The central chin is prominent and prominent. From winter to early spring, flowering at the top of stem section, symmetrical on both sides. Variety of different, there are pink, dark red, white, orange, yellow and other colors, flower tube light brown, with 4 edges, perianth 3 to 4 rounds, was tower-like stacking, petals open rewinding, 6.5 cm ~ 8 cm long, the base 2 to 3 rounds are bracts, petaloid, extending out to the periphery of the flat 3 exhibition, due to sagging growth of the corolla, it can be self-pollination. Fruit pear-shaped or broadly elliptic, smooth and dark red.
2. Ecological habits Originated from tropical forests in eastern Brazil, in the natural environment it is often attached to trunks or shaded and moist valleys. The branches droop to form a hanging shape. Hi warm and humid and semi-yin environment, the soil requires fertile leaf-leaf and peat, suitable growth temperature is 20c ~ 25c, not cold, the winter temperature should not be less than 10c.
Can be cut, grafted and sown.
3, breeding methods Cuttings can be cut in the spring to grow full of abnormal stems, it is easy to root, but after cutting stem sections, should be placed in the cool place 1 to 2 days, until the incision is slightly dry and then inserted in the sand bed, after insertion Humidity should not be so great as to prevent the incision from rot and rooting can begin after 3 weeks.
For example, in order to cultivate an umbrella-like drape shape and increase ornamental value, grafting is generally applied. Compared with cuttings, grafting and reproduction have a strong growth potential and flowering early. Grafting is best in spring and autumn. Because of the appropriate temperature, the survival rate is high. Grafting in summer in high temperature and high humidity season, the incision is susceptible to infection and rot. The survival rate is low. Cactus plants can be used as rootstocks. However, hylocereus undatus and pereskiaaculeata are better, and when grafting, they are selected to be robust and hypertrophic. The centimeters of the plants are used as rootstocks. Cut off the top 10 centimeters, leave 20 centimeters, and cut into wedge-shaped mouths. Scaffolds are then scalded (3 to 5 knots are appropriate) and the lower end is cut into a duck bill shape. Immediately insert a wedge-shaped cleft, and insert a depth of wood that is deep enough to the center of the rootstock. In order to prevent slipping of the scion, it can be inserted and fixed by a pin or cactus, and some rootstocks can be connected to 2 to 3 scions. Such as the use of leaf cactus as an rootstock, then cut a hole in the top of the rootstock, and then cut the scion into the lower end, with plastic thin strips tied, or with a long cactus fixed. After grafting, cool shades should be placed to maintain a high air humidity. After about 10 days, if the scion is still firm and green, it has healed and needs to be carefully maintained. After January, iron wire racks can be set to allow the scion to be evenly racked and gradually placed in a sunny place for normal management.
4, cultivation techniques Crab Hibiscus hi half shade, moist environment. Potted soil requires well-drained, loosely ventilated fertile soil. To shade and shelter from the rain in summer, it is best to place it on a well-ventilated window, balcony or eaves, and underneath it. The air is dry, hot, and poorly ventilated. The most unfavorable to the growth of Crabgrass is that it often leads to the spread of spider mites. The damaged plants grow poorly, and the metamorphosed stems shrink and fall off from the base. Prevention of spider mite damage should be based on improved ventilation. After the disease occurs, 0.8be of lime sulfur can be used to kill. During the growth period, thin liquid fertilizer can be applied. After the fall, before flowering, the fertilizer and water will continue to grow. After the autumn cool, it can be moved to a room where there is plenty of sunlight. At the same time, the plants must be trimmed. To those who have too dense stem sections, thinning should be carried out and excessive weak buds should be removed. Winter room temperature should not be too high, to maintain 15c is appropriate.
C. jasminoides is a short-day plant. It can bloom in 2 to 3 months under short days (8 to 10 hours of sunshine per day). If it can bloom in October, it can use a light-proof hood in July. The plants were treated with short daylight and they only saw light for 8 hours a day, so that they could bloom in late September. After the emergence of buds, the potted soil should not be too dry, otherwise the buds will fall off easily. When the buds are formed at the beginning, watering should be reduced as appropriate, and watering is too easy to bud. When flowering, it should be placed in a relatively cool (12c~15c) room, so that the flowering time can be extended. There is a short period of dormancy after flowering, in which case the pot soil should be kept a little dry. After the dormancy period, new shoots will emerge from the top of the metamorphosis stem, and normal watering and fertilization can be performed.
In cultivation, it is common to see that some species of C. jasminoides grow well, but they do not bloom or bloom very little. this circumstance occurs. Should check the placement is appropriate, because it is a short-day plant, the light is only less than 10 to 12 hours per day, the plant can form buds, such as adequate light during the day, and after the dark place is just a strong lighting, Under such long-light conditions, the plants are often not prone to bud formation. In addition, excessive shade or excessive fertilizer may also affect flowering.
For plants that have been cultivated for 3 to 5 years or more, the crown can often reach more than 50 cm. To control the plant shape, the stem segments can be shortened in the spring, and at the same time sparse sections of the stem sections that are weakly or too densely grown can be sparsely cut. After the cut, the new stems grow bright and strong.
Let's see the specific software functions of the Network Video Recorder:
The NVR software interface (GUI) is a human-computer interaction window. All the functions of the system, such as these operations of the channel parameter setting, the start and stop recording, the video browsing, the video playback, the video export, the PTZ control, and so on, are completed through this user interface.
2. The video browsing function
Generally speaking, all the video and audio channels in the system (including the channels under other NVRs) can be added to and displayed on the NVR software platform. A clear structured channel resource directory tree can be formed on the GUI to directly perform the on-site video browsing operations, with no need to firstly log in and connect different NVRs to load different NVRs first. There are two ways to browse the on-site video. One way is to directly drag the corresponding channel on the left to the target window display area, and the other way is to select the display window first, and then enter the shortcut key of the channel on the keyboard and press Enter.
3. The recording and storage function
The recording and storage function supports the video recording, storage, and backup.
4. The playback and export function
(1) The multiple playback modes
The video playback has a variety of modes, including the playback in time periods, fast playback of the alarm videos, and reverse playback at any time, and so on. During the playback, the user can play the video frame by frame, and also can add markers to the playback clips, so that he/she can find the corresponding clip he/she need easily when he/she needs in the future. Besides, various operations such as the normal playback, accelerated playback, slow-down playback, pause, and stop, can be performed during playback.
(2) The video export
(3) The multi-channel playback
If some on-site incidents occur, in order to fully know the situation of the surrounding scenes at that monitoring point, sometimes it is necessary to synchronize the playback of the videos from multiple channels, which will facilitate the panoramic display of the entire process of the event.
5. The incident investigation
6. The user authority management
7. The user operation log
8. The equipment management
In conclusion, the Network Video Recorder technology has been widely promoted and applied to the fields of urban security storage, national security and other engineering projects, because of its own advantages in many aspects. And the Network Video Recorder technology is bound to become the mainstream technology in the field of urban security high-definition video surveillance because of the driving of the market, technology, and so on. Undoubtly, the Network Video Recorder technology has very strong prospects for the theoretical research and practical application.
