Life newspaper May 19 th The wild Siberian tiger was first discovered in China on May 20 last year, and it has been occupied by Raohe County and surrounding forest farms for a whole year. Experts say that in its mind, this area is its territory. It used to be just a transit, and there is no sign of leaving this year. The natural environment in our province is improving, which provides a broad living space for the Northeast Tiger. Moreover, this Northeast Tiger is a "foodie". According to the statistics so far, it has eaten five roe deer, two wild boars and a cow.

　　According to Sun Chengfu, director of the Wildlife Protection Office of Raohe Forestry Bureau, after follow-up research, DNA identification and behavioral research, it has been confirmed that this tiger has settled in our province, but it is not the only one that is hard to say, because there are reports of activities of the Northeast Tiger in other forest areas.

　　　What did you do this year?

　　　1. A large number of claw marks were found on the trunk of contiguous forest land.

　　"This tiger has formed a fixed territorial scope, showing a specific demarcation behavior of wild animals." Sun Chengfu said. The territory of the wild Siberian tiger is about 1000 square kilometers for males. The contiguous forest land here is suitable for the Siberian tiger to settle down, and its forest area is close to 1000 square kilometers.

　　"When the Northeast Tiger takes a fancy to a place, it will leave paw marks on the tree and mark the boundary with urine. If there are these marks, other tigers will not invade without authorization." Sun Chengfu said that they found a lot of claw marks on the thick trunk of the territory boundary, which is called "hanging claws", and urine was collected in winter.

　　　It has been found to have eaten five roe deer, two wild boars and a cow.

　　On December 12 last year, Sun Chengfu and his colleagues took more than 100 photos of the Northeast Tiger eating cattle with a far-infrared camera, which is quite precious. On the same day, they received a report from the villagers that his old cow might have been attacked by the Northeast Tiger. Sun Chengfu rushed to the scene and found that the cow was eaten by a third of the tiger. More than 200 kilograms of adult cattle, the Siberian tiger killed it effortlessly, and dragged the body for hundreds of meters, hiding it in a deep ditch on the edge of the corn field. Sun Chengfu judged that the tiger would come back if the beef was not finished, so he arranged the shooting equipment nearby. Sure enough, the next day, the Siberian tiger returned to the scene and moved the beef to eat again.

　　Sun Chengfu said: "From the photos, this Siberian tiger is strong and well-nourished, indicating that there is enough food. According to statistics so far, it has eaten five roe deer, two wild boars and one cow. "

　　I went back to Russia to "find someone" and came back two months later.

　　This tiger went back to Russia once, and Sun Chengfu speculated that it was going back to "find an object". In the middle of December last year, during the patrol, Sun Chengfu found that the tiger trail extended to the Sino-Russian border. He tracked it for more than 20 kilometers and found that the tiger trail crossed the center line of the main channel of the Wusuli River and disappeared on the Russian side.

　　Two months later, the Northeast Tiger returned to the territory of Raohe County. Sun Chengfu said: "After mating, the Northeast tiger went back to its territory, and this tiger returned to China, which once again proved that it had settled in our province."

　　　4. I once strolled to the human activity area, 10 meters away from the fishing room.

　　"Leave as soon as possible in case of the remains left by tigers. Maybe the Northeast Tiger is not far away." According to reports, this Siberian tiger is not afraid of people, and it has been recorded in the vicinity of human activities. The last time it was 10 meters away from the fishing house by the river. On the 16th, Raohe Forestry Bureau issued an announcement to remind the general public, "Don’t enter the mountain at will for personal safety". According to reports, local residents generally walk together in the mountains, carrying firecrackers with them, driving tigers away with firecrackers, and trying to stay away from the Northeast Tiger activity area.

　　First discovery: May 20th last year.

　　A five-or six-year-old male adult tiger left a trail of footprints in farmland.

　　Raohe County is located in the northeastern border of our province, with a border line of 128 kilometers and a forest coverage rate of 51%. This area is one of the important corridors and activity areas for Siberian tigers to enter China from Russia. In recent years, many Siberian tigers have been active in the forestry application area here.

　　"This Siberian tiger was first discovered on May 20 last year. From this day, it has been here for one year." Sun Chengfu said.

　　Last year, a series of footprints left by the Northeast Tiger in the farmland exposed its whereabouts. "At that time, experts from the Cat Research Center of Northeast Forestry University happened to be investigating in Raohe River. After discovering the paw prints, the experts unanimously concluded that it was the footprints of the Northeast Tiger. Through the size and depth, the experts thought it was a male adult tiger, and the tiger was five or six years old." Sun Chengfu said.

　　Goodbye tiger trail: March 1 this year

　　The feces of Amur tiger collected again are the same as before.

　　The local animal protection staff conducted a follow-up study. In addition to taking photos and infrared cameras, they also collected the feces of Siberian tigers many times. On March 1, 2018, the tiger trail was found again in Shiye District of Tonghe Forest Farm. After 7 days of tracking, the wildlife department of Forestry Bureau collected the feces of the Northeast Tiger again and sent it to Northeast Forestry University for DNA identification. Compared with the previous feces, it was judged to be the same tiger.

　　Video tiger: April 23 this year

　　20 pairs of far-infrared devices captured 3 seconds of video.

　　Sun Chengfu said that 20 pairs of far-infrared camera equipment have been put into the territory of the Northeast Tiger, each pair of equipment includes a camera and a video camera, 10 warning signs have been set up in key activity areas, and 14 patrolmen are responsible for the protection and investigation of the Northeast Tiger. At 3 o’clock in the morning of April 23 this year, infrared camera equipment captured a 3-second video of the Northeast Tiger. The video shows that this Siberian tiger walked deep into the jungle through the forest road. This is the only video of this Siberian tiger.

　　Recent trail: May 10th this year.

　　I enjoyed another wild boar more than a week ago.

　　Sun Chengfu said that on May 10 this year, it was the last time they photographed the trail of this wild Siberian tiger. A wild boar killed by it had been hollowed out. "The pork hasn’t had time to eat, which means it may be not far away, so I only took a photo at that time and immediately evacuated."

　　CCTV News:In his speech on the 8th, US President Trump specifically mentioned the so-called evidence about Iran’s secret nuclear weapons program released by Israel a week ago. The Israeli move can be described as an "assist" for the United States to withdraw from the Iranian nuclear deal. Why should Israel join hands with the United States to put pressure on the Iranian nuclear issue? Will the deteriorating relationship between Israel and Iran lead to a bigger conflict?

　　Israeli Prime Minister Benjamin NetanyahuTonight we will show the latest and conclusive evidence about Iran’s secret nuclear weapons program. Iran has been hiding this plan from the international community for many years. In this secret nuclear file, we will show you Iran’s secret nuclear documents. "

　　This is a televised speech delivered by Israeli Prime Minister Benjamin Netanyahu in the Ministry of National Defense on the evening of April 30th local time. In his speech, Netanyahu showed the so-called Iranian secret plan to develop nuclear weapons recently obtained by Israeli intelligence agencies, and based on this, he believed that the Iranian nuclear deal was born out of lies. In the statement that the United States withdrew from the Iranian nuclear deal, Trump specifically mentioned the so-called "evidence" provided by the Israelis. However, in the eyes of many experts, this seems to be more like a diplomatic "cooperation performance" between the United States and Israel.

　　Efron, President of Jerusalem Institute for Strategic Studies"Obviously, the United States is not surprised by Netanyahu’s televised speech. They must have known it beforehand."

　　Dissatisfied with the Iranian nuclear deal and the United States to jointly suppress Iran

　　In fact, since Iran and the Iranian nuclear issue reached a historic comprehensive agreement in 2015, Israel has expressed strong dissatisfaction. Netanyahu called this a "shocking historical mistake", which once caused a rift between him and the Obama administration. However, with Trump’s coming to power, the attitude of the United States on the Iranian nuclear issue has reversed; In addition, in recent years, Iran has become more and more involved in hot issues in Syria, Yemen and other regions, which has made Israel sit on pins and needles and lobbied the United States to suppress Iran through the Iranian nuclear issue, which has become the common interest choice of the United States and Israel.

　　Efron, President of Jerusalem Institute for Strategic Studies: "Israel is very concerned about Iran’s actions in regional affairs, not only in Syria, but also in Yemen, Lebanon, Iraq, etc. We have seen Iran’s ‘ Strong ’ . This has something to do with the Iranian nuclear deal, because the agreement stopped many sanctions, which actually benefited Iran a lot. The Middle East countries generally believe that Iran can still continue its nuclear program after the Iranian nuclear deal expires. "

　　The Iranian nuclear deal’s bankruptcy will aggravate regional tensions.

　　At present, the Iranian nuclear deal is already teetering. Some people worry that once the agreement goes bankrupt, Iran will restart its nuclear program, which will further increase the risk of military conflict in the Middle East.

Today, let’s take a look AT the AT gearbox and the dual clutch gearbox, which one should we choose? Please see next.

AT gearbox:Variable speed is realized by hydraulic torque converter and planetary gear set. Hydraulic torque converter uses liquid to transmit power, which can cushion the power impact of the engine; Planetary gear sets realize different transmission ratios according to different combinations.

dualclutchtransmissionThe odd and even gears are controlled by two clutches, which is equivalent to integrating two sets of manual gearboxes. When shifting gears, prepare the next gear in advance to realize fast shifting.

Shift speed: the shift speed of dual clutch gearbox is extremely fast, usually only about 0.2 seconds, while AT gearbox is relatively slow.

Transmission efficiency: the transmission efficiency of dual-clutch gearbox is high, and the power loss is small, which can generally reach about 85%-90%; The transmission efficiency of AT gearbox is relatively low, about 70%-85%.

Driving experience: the dual-clutch gearbox is more direct and neat when shifting gears, which can bring better driving pleasure, but it may have a sense of frustration when driving at low speed; The shift of AT gearbox is relatively smooth and comfortable, but the dynamic response may not be as direct as that of dual clutch gearbox.

Structural complexity: AT gearbox has a complex structure, including hydraulic torque converter, planetary gear set and other components; The structure of dual clutch gearbox is relatively simple, similar to manual gearbox.

Cost: Generally speaking, the manufacturing cost of AT gearbox is high, especially the high-end AT gearbox; The cost of dual clutch gearbox is relatively low, especially dry dual clutch.

Good ride comfort: the existence of hydraulic torque converter makes the shift process softer, the shift feeling is obvious and the driving comfort is high.

Large torque bearing: able to bear large engine torque output, suitable for all types of vehicles, including high performance and large vehicles.

Mature technology: it has a long history of development, relatively mature and stable technology, high reliability and low failure rate.

Simple operation: the driver only needs to control the throttle and brake, and there is no need to manually shift gears, so the operation is simple and easy.

Disadvantages:

Low transmission efficiency: power will be lost in the transmission process, resulting in relatively poor fuel economy.

Complicated structure: The complicated structure makes AT gearbox bulky, heavy and costly to manufacture.

Slow shift speed: compared with the dual clutch gearbox, the shift speed is not fast enough, which affects the dynamic response and acceleration performance of the vehicle to some extent.

High fuel consumption: Due to the low transmission efficiency and its own structural characteristics, the fuel consumption of AT gearbox vehicles is relatively high.

Fast shift speed: it can complete the shift operation in a very short time, and the power interruption time is short, which can provide better acceleration performance and driving experience.

High transmission efficiency: direct power transmission reduces energy loss and improves fuel economy, especially at high speed.

Simple structure: Compared with AT gearbox, it is relatively simple in structure, small in size and light in weight, and easy to install and arrange on vehicles.

Low cost: the manufacturing cost is relatively low, which helps to reduce the price of the whole vehicle.

Disadvantages:

Low-speed setback: Under low-speed driving, frequent start-stop or congested road conditions, there may be setbacks, which will affect driving comfort.

Reliability problem: There were some reliability problems in the early dual-clutch gearbox, such as clutch overheating and wear, but with the continuous improvement of technology, the reliability has been greatly improved.

High heat dissipation requirements: especially for dry dual-clutch gearbox, because there is no oil immersion to dissipate heat, long-term intense driving or frequent gear shifting will easily lead to overheating, which will affect performance and life. The wet dual-clutch gearbox dissipates heat through oil, which is relatively good, but the cost is high.

High maintenance cost: The clutch plates and other parts of the dual-clutch gearbox are vulnerable parts, which may need to be replaced after a certain mileage, which increases the maintenance cost.

So, friends, which gearbox do you prefer?

　　On July 11th, 2024 (23rd) China Internet Conference hosted by internet society of china closed in Beijing. Internet society of china released the China Internet Development Report (2024) at the closing ceremony (hereinafter referred to as the Report).

　　According to the Report, since 2023, China’s Internet industry has thoroughly implemented the spirit of the 20th Party Congress and resolutely implemented strategic plans such as the Overall Layout Plan for the Construction of Digital China. China’s network infrastructure construction has become increasingly complete, key cutting-edge technologies have been innovated and developed, the digitization level of key areas has been steadily improved, the comprehensive network governance framework has been accelerated, the network security industry has developed at a high quality, and the development of digital China has shown a good trend.

　　Specifically, China’s Internet industry presents the following development characteristics: First, in terms of basic resources and technologies, the construction of new information infrastructure such as 5G and Gigabit optical fiber networks in China is becoming more and more complete, the scale of IPv6 users and traffic of the next generation Internet is significantly improved, the construction of satellite Internet is progressing steadily, and the service capacity of optical fiber broadband network is continuously enhanced; Computing infrastructure construction has reached the world’s leading level, the proportion of intelligent computing power has increased to 30%, and the scale of cloud computing market has grown rapidly; The overall management system of data elements is more perfect, and it is a consensus to promote the development of data elements by classification; The application process of artificial intelligence industry continues to advance, and various service models gradually emerge, and the demand for high-quality data is increasingly prominent; The number of mobile Internet of Things users has increased significantly, and the application of Internet of Things has entered a period of large-scale explosion. Second, in terms of Internet applications and services, the industrial Internet has entered a new stage of large-scale development, and the number and reality are deeply integrated to serve the new industrialization construction; The e-commerce market is growing steadily, and the new kinetic energy of digital consumption is getting stronger and stronger; The business transaction application mode format continues to iterate, and new formats such as cross-border e-commerce have developed rapidly; The scale of digital entertainment users continues to climb, AIGC empowers the development of digital entertainment, and vertical large-scale model applications have landed. Third, in terms of network governance and environment, the Internet governance system has been further improved, and grassroots social governance has increased "number" and "wisdom"; The network security industry has entered a stage of rapid growth, and digital security has become a strategic guarantee for digital development.

　　Looking forward to the future, China’s Internet industry will continue to thoroughly implement the requirements for the construction and deployment of digital China. First, the construction of digital infrastructure will be further accelerated, and the deployment of new network infrastructure represented by 6G and satellite Internet will be accelerated, the layout of computing infrastructure will be further optimized, and the allocation of computing resources will be more reasonable and orderly. Second, digital technology innovation will gradually push the Internet towards intelligence. The implementation of "Artificial Intelligence+"and the rapid development of multi-modal large models will promote the new generation of artificial intelligence technology to accelerate the expansion of application scenarios. Third, the core role of algorithms, computing power and data will be more prominent. The demand for computing power development will promote the continuous improvement of independent research and development and manufacturing capabilities of high-end chips. Data resources will be coupled with artificial intelligence technology, constantly spawning new industries, new models and new formats, and generating new economic growth points. Fourth, the Chinese-style network governance framework will be accelerated, and the governance of key areas such as artificial intelligence and new technologies will gradually move towards institutionalization and legalization. The regulatory framework and principled governance rules will be more clear, and the multi-sectoral joint governance pattern will gradually take shape. Fifth, the application of industry integration will empower the interconnection of values, promote the further integration of key elements such as people, machines and data, and accelerate the digitalization and intelligent upgrading of manufacturing. Sixth, the space for international cooperation in the digital field will be further expanded, the construction of the "Digital Silk Road" will continue to advance steadily, and the scope of "Silk Road E-commerce" partner countries will be further expanded.

　　Regarding the "new network infrastructure represented by 6G and satellite Internet" mentioned in the Report, Pan Helin, a member of the Information and Communication Economy Expert Committee of the Ministry of Industry and Information Technology, said in an interview that the new network infrastructure is newer, faster and larger than the existing network infrastructure. In the field of wireless communication, 6G is new and 5G is existing; Satellite Internet is new, and ground base station communication is existing. 6G not only pursues higher data transmission speed, but also pays more attention to the intelligence, ubiquity and security of the network, aiming at realizing the seamless connection of air, space and sea integration. The satellite Internet provides high-speed Internet access services around the world through LEO satellite constellations to solve the problem of insufficient ground network coverage. The deployment of this kind of infrastructure means that the information and communication technology is evolving towards the goal of higher dimension, wider coverage and deeper integration. At the same time, it also means that China’s communication infrastructure will keep up with the world’s most advanced technical fields and maintain the leading position of communication network performance in the world, thus better empowering China’s economic and industrial development. (Author Su Deyue)

　　Xinhua News Agency, Chengdu, April 6 (Reporter Yu Li, Feng Changyong) The reporter learned from the China Giant Panda Conservation and Research Center, which has the largest captive giant panda population in the world, that the center has completed nearly half of the breeding and breeding tasks of captive giant pandas this year, and the giant panda breeding has entered a peak period.

　　By the end of 2015, the number of captive giant pandas in the center had reached 218. Zhang Guiquan, director of Ya ‘an Base of China Giant Panda Conservation and Research Center, said that this year, 26 female pandas and 19 male pandas participated in the national captive giant panda breeding program. Since the first female panda was bred in late February, as of April 6, 10 female pandas have been bred. Among them, 6 were bred by natural mating, the other 2 were bred by natural mating with artificial insemination, and the remaining 2 were completely artificially inseminated.

　　"So far, this year’s breeding work has been completed well. The biggest feature is that the natural mating rate is relatively high, and the pregnancy rate of female pandas that have successfully mated naturally is over 90%, which is a good momentum for this year’s breeding work." Zhang Guiquan said.

　　"Under the current captive conditions, the number of male giant pandas with natural mating ability is very rare, accounting for less than 5% of the population. This year, the center belongs to the 7-year-old male giant panda ‘ An An ’ The first successful natural mating at Ya ‘an base on February 29th marks the addition of a male animal with natural mating ability to the captive giant panda population, which also shows that the quality of our captive giant panda population is constantly improving. " Zhang Guiquan said.

　　According to reports, at present, the artificial breeding of captive giant pandas in China is included in the unified planning, and the optimal pairing is carried out according to the principle of eugenics, so as to ensure the genetic diversity of the population to the greatest extent. There are 56 female pandas participating in the breeding program this year, and more than one third of them are from the China Research Center for the Protection of Giant Pandas.

　　There are three major problems in the development of captive giant panda population: difficulty in estrus, difficulty in mating and conception, and difficulty in survival of cubs. According to zhangxin, the breeder of the center, giant pandas are in estrus every spring. With the increase of temperature, their hormone level, estrus behavior and mating desire will decrease from May, which will affect the mating quality. Therefore, March and April are the prime time for giant pandas to breed. In order to ensure that female pandas are pregnant, some will also receive artificial insemination as appropriate after natural mating.

　　In recent years, the artificial breeding of giant pandas in the center has been carried out at Bifengxia base in Ya ‘an. The reporter saw at the base on the 6th that the staff was preparing to breed the 7-year-old female panda "Jojo". Because Jojo’s estrus behavior was not typical enough, she was not allowed to mate naturally. In this regard, Zhang Guiquan said that this is a normal situation.

　　It is reported that female giant pandas not only have a short estrus time, but also need to mate with each other to be successful. If there is no electricity between pandas, mating may fail even during estrus. In addition, even if natural mating is successful, it is very difficult for female giant pandas to finally give birth to panda babies — — Their eggs can only survive for 36 to 40 hours. Even with breeding, only 30% to 40% of female giant pandas can get pregnant successfully, while the survival rate of their cubs is less than 40%.