Cang Li Shi, the world is safe. To ensure national food security! "Ensuring food security has always been a top priority for the national economy and people’s livelihood. It is necessary to study and improve food security policies, take capacity building as the foundation, and realize grain storage on the ground and grain storage in technology."

　　At the wharf of the grain and oil base in Tianjin Lingang Economic Zone, a freighter loaded with soybean, wheat and other grain and oil raw materials from overseas is unloading. After the fresh materials are disinfected and squeezed by equipment, golden soybean oil flows out, and the "Fulinmen" on the dining table of thousands of households is born.

　　Recently, the second-stage general contracting project of the first-stage silo of Tianjin Lingang Economic Zone, which was installed and built by China Construction, was successfully capped and passed the main acceptance. As the first link of the "front dock and back factory" of Tianjin Lingang grain and oil industry, the project consists of eight reinforced concrete silos. After completion, the storage capacity of soybeans can reach 288,000 tons. By then, Tianjin Lingang Grain and Oil Industrial Park will become the largest grain, oil and food processing base in the north, providing a strong guarantee for food security and stable food supply for residents in the north. It is expected to be officially put into operation in April next year.

　　Deeply rooted and tamped the granary "chassis"

　　Tianjin Lingang Economic Zone is located in the shallow beach area at the mouth of Haihe River. It is a port born from land reclamation and belongs to muddy coastal zone with poor geological and hydrological conditions. The silo has an outer diameter of 28 meters and a height of 44 meters. It is the first step for the project team to build a stable "people’s rice bowl" by making the "Eight Giants" firmly located on the dock and ensuring a solid foundation.

　　Before the start of construction, the project department organized experts to conduct on-site surveys for many times. After design, research and discussion, it was finally decided to adopt the pile mat foundation method. First, the bored pile technology was used to pile piles, and then the circular raft foundation was laid to stably support the silo "body". Due to the huge volume of silos, the deepest pile foundation needs to be drilled to 43 meters underground, but the maximum distance between silos is only 2 meters wide, which is always at risk of collapse. After repeated research and demonstration, the installation team of China Construction decided to set 40 supports around the foundation pit to fix the ground of the built silo to prevent the ground from collapsing during excavation. With the continuous operation of five pile drivers for 24 hours, the project team laid 1120 cast-in-place piles in only 36 days, laying a solid foundation for the silo.

　　After the pile foundation is "stabilized", it is necessary to lay a raft foundation with a thickness of 1.7 meters. The project team innovatively used the channel steel welded support system to replace the traditional reinforced horse stool and set up the "skeleton" of the raft, which solved the problems of large welding amount and high cost of the reinforced horse stool, and it was convenient to disassemble and assemble, which improved the construction efficiency. Before pouring concrete, the project team embedded 3 temperature measuring points and 15 wire probes in each silo. After pouring, external temperature measuring equipment was connected to monitor the concrete temperature at the corresponding position, and the cracking of mass concrete was effectively prevented by covering the concrete surface with felt and storing water. The project team completed 8800 cubic meters of concrete pouring in just one month, and the huge silo was "sitting like a clock".

　　Consolidate the foundation, expand the new and build a stable grain "protection warehouse"

　　The silo is composed of silo wall, funnel and silo roof. Considering the small space and limited working surface, the project team decided to adopt slip-form technology for the construction of silo wall. The double silos slide up at the same time, every 30 cm is poured, and when the concrete is initially set, the formwork will be lifted once, which is not only complicated and technically difficult, but also that once the slipform is opened, it can not be interrupted day and night, and any link will have an impact on slipform construction and silo quality.

　　In order to ensure the construction quality, every time it is lifted, the inspection personnel should carefully check whether the slip-form platforms of the two silos are deformed and whether the levelness and verticality are consistent. After 24-hour continuous construction and close cooperation of all disciplines, the concrete of eight silos was nearly 9,600 cubic meters, which was finally poured in 40 days, and the silo "body" construction was completed 7 days ahead of schedule.

　　The top of the silo is conical shell, which is the last step of the main construction and the most difficult "hard bone". Because the warehouse roof is constructed at an altitude of 44 meters, the constructors have no working platform to stay on. The conventional method is to build a full-house supporting frame to assist the construction. However, the traditional full-house supporting frame has a large volume, a lot of turnover materials and a long erection period, which affects the construction progress. Zhao Yafei, the chief engineer of the project, repeatedly studied and analyzed the bearing capacity and stability of the supporting system, and calculated it for more than 100 times. Finally, he innovatively developed a set of Bailey frame supporting system assembled construction platform, which consists of corbel, central column, jacking and Bailey. The installation and disassembly of the platform is simple and quick, which not only speeds up the construction progress, ensures the quality, but also reduces the construction cost and shortens the construction period by 45 days. This innovative technology has also won the national patent.

　　Ingeniously adhere to the "safety defense line" of building granaries

　　Kong Fanfeng, the project manager, has been stationed in Tianjin Lingang Wharf for six years. He led nine young people with an average age of 28 who were responsible for the electromechanical installation of the first phase of the silo, but the main construction area of the silo was also their "blank area". "Let’s build the silo, and the country’s big granary will be solid." This young team braved the wind and waves and fought against the sky to explore and crack the "construction password" of the granary.

　　It is said that the construction of the wharf depends on the weather, especially the sea breeze and rain in summer, which "beat" the wharf wildly, which brings great difficulties to the construction. The sliding formwork construction of the warehouse wall is in midsummer, so the project department prepares rain-proof materials in advance and adds sandbags for flood control at the low-lying places on the site in advance. Seeing that the slip-form casting is about to be completed, suddenly the sky is cloudy and thunder is rolling, and the raindrops as big as beans fall, and the dock instantly opens the "sea-watching mode". The rain is getting heavier and heavier, and the poured concrete has not completely solidified, and it is mixed with rain and flows out with "black water".

　　"So concrete and template stick together? The platform must be lifted by 50 mm every 30 minutes to separate the formwork from the poured concrete! " Zhao Yafei, the chief engineer of the project, couldn’t sit still. He rushed to the hydraulic console against the strong wind, neglected the umbrella, and controlled the sliding formwork body to move up slowly through the console. When other people saw it, they also ran into the rain, picking up the plastic sheets for rain protection in one hand and holding the plates next to them in the other. Qi Xin worked together to set up a "protective shed" on the hydraulic console. Everyone tacitly accepted Zhao Yafei’s "baton" and stuck to it in the rain to ensure that the sliding formwork moved up at a constant speed.

　　After the rain cleared, the project team immediately conducted a comprehensive "physical examination" on the strength of concrete, two tower cranes and 108 jack equipment to ensure that the sliding formwork body climbed steadily. The cold sea breeze stung their dark and cracked hands, and the waves were surging, beating their ingenious granaries. After 18 months of persistence, the installation team of China Construction completed the main construction task with high quality and efficiency.

　　Establish a "big country granary" to protect food security. The installation of state-owned enterprises helps to build a world-class grain and oil terminal with the highest degree of modernization in China! (Sun Li Shen Ruying Hong Yan)

　　◎ reporter Zhang mengran

　　Have you searched the Internet for "What hurts me? Is there something wrong with me?"? The answer may not be satisfactory. However, with the emergence of large-scale natural language models (LLM) such as ChatGPT, people began to try to use it to answer medical questions or medical knowledge.

　　However, is it reliable?

　　As far as it is concerned, the answer given by artificial intelligence (AI) is accurate. However, James Davenport, a professor in university of bath, pointed out the difference between medical questions and actual medical practice. He believed that "medical practice is not just about answering medical questions. If we just answer medical questions, we don’t need to teach hospitals, and doctors don’t need to receive years of training after academic courses."

　　In view of all kinds of doubts, in a recent paper published by Nature, the world’s top artificial intelligence experts showed a benchmark to evaluate how well large-scale natural language models can solve people’s medical problems.

　　The existing model is not perfect.

　　The latest assessment comes from Google Research and Deep Thinking. Experts believe that the artificial intelligence model has many potentials in the medical field, including knowledge retrieval and supporting clinical decision-making. However, the existing model is not perfect, for example, it may fabricate convincing medical error information, or include prejudice to aggravate health inequality. Therefore, it is necessary to evaluate their clinical knowledge.

　　Relevant assessments have not been without before. However, in the past, it usually relied on automated evaluation of limited benchmarks, such as individual medical test scores. This is translated into the real world, and both reliability and value are lacking.

　　Moreover, when people turn to the Internet to obtain medical information, they will encounter "information overload" and then choose the worst one from 10 possible diagnoses, thus bearing a lot of unnecessary pressure.

　　The research team hopes that the language model can provide short expert opinions, be unbiased, indicate its citation source, and reasonably express uncertainty.

　　What is the LLM performance of 540 billion parameters?

　　In order to evaluate the ability of LLM to encode clinical knowledge, Xie Kufei Aziz, an expert from Google Research Institute, and his colleagues discussed their ability to answer medical questions. The team put forward a benchmark called "MultiMedQA QA": it combines six existing question-answering data sets covering professional medical care, research and consumer inquiries and "HealthSearch QA" & mdash; — This is a new data set, which contains 3173 medical questions searched online.

　　The team then evaluated PaLM (a 540 billion parameter LLM) and its variant Flan-PaLM. They found that Flan-PaLM reached the most advanced level in some data sets. Flan-PaLM surpassed the most advanced LLM by 17% in the MedQA data set integrating the questions of American medical license examination.

　　However, although Flan-PaLM scored well in multiple-choice questions, further evaluation shows that it has a gap in answering consumers’ medical questions.

　　LLM of specialized medicine is encouraging.

　　In order to solve this problem, artificial intelligence experts use a method called design instruction fine-tuning to further debug Flan-PaLM to adapt to the medical field. At the same time, the researcher introduced an LLM— — Med-PaLM。

　　Fine-tuning design instructions is an effective way to make general LLM suitable for new professional fields. The resulting model Med-PaLM is encouraging in the trial evaluation. For example, Flan-PaLM scored by a group of doctors is only 61.9% consistent with the scientific consensus, and Med-PaLM scored 92.6%, which is equivalent to the answers made by doctors (92.9%). Similarly, 29.7% of Flan-PaLM’s answers were rated as likely to lead to harmful results, and only 5.8% of Med-PaLM’s answers were equivalent to those of doctors (6.5%).

　　The research team mentioned that although the results are promising, it is necessary to make further evaluation, especially in terms of safety, fairness and prejudice.

　　In other words, there are still many limitations to overcome before the clinical application of LLM is feasible.

The writer of this article is @ Ghost Feet of Xiaowan Family.

The only function of movies is to make life more interesting than movies.

What is the most wonderful superhero work in the first half of 2020?

Originally, the answer to this question would probably be the much-anticipated Black Widow, but an epidemic disrupted the plan. In the second half of the year, Black Widow changed its file and gave this position to the classic role of DC, harley quinn.

No, no, no, what Xiaowan wants to say is not the Raptor Team, which has an average reputation at the beginning of the year, but the cool launch of DC.The animated series harley quinn..

The first season of "harley quinn" started on November 29th, 2019, and 13 episodes were broadcast in February this year.Douban score as high as 9.0, IMDB score 8.4.

In April this year, the second season was broadcast, and the score was also 9 points, which can be said to be a rare big surprise this year.

Do you think such a high score is due to the halo of fans? Actually, it’s more than that

"harley quinn" maintained.DC animation works have always been of high standard.This time, not only the characters and plots are portrayed in place, but also the orientation of adults has greatly improved the visibility of the whole work.

Coupled with the ubiquitous spit and parody, this is simply the best choice for people who have to stay at home.

Before talking about this explosive animation, let’s take a look at Birds of Prey at the beginning of the year. This super-English film played by Margot Elise Robbie as clown harley quinn was highly anticipated before it was released, but the result was that.Except that Margot Elise Robbie’s shape is still perfect.Besides, there are few other special advantages.

The blunt theme of women’s independence, the uncharacteristic role design and the old-fashioned plot all make DC (once again) a bad start in live-action movies.

Fortunately, however, there is harley quinn.

The main plot and story background of this animated series are almost the same as those of Raptor Team, and the same is true.After breaking up with the clown, harley quinn decided to go it alone., not only to get rid of the clown’s control over her, but also to prove her strength.

However, compared with the Raptor Team, which forcibly uses the Raptor Team composed of women to promote women’s independence, the clown girl in harley quinn is the same.Facing the problem of how to find yourself after leaving the clown..

She formed her own small team to build trust among her peers little by little; She has her own best friend "Poison Ivy" Ivy, who always silently supports her behind her back; She also began to face her childhood and past, and stepped out of the haze brought by the clown.

In the end, I destroyed the clown’s exclusive Gotham plan with the strength of myself and my companions.

This road of "self-help" is far more convincing than the formal gathering of women in Raptor Team.

Of course, as a drama series, harley quinn has more room than movies.Show the relationships and details of the characters..

For example, we can see that harley quinn and Ivy have had conflicts and mutual understanding like good sisters; There are also "neurologists" who always complain impatiently, but they still care about Harry in their hearts; And harley quinn is clearly a villain, but insists on his own inner principles; You can even see the interaction between Harry and Batman …

All these together constitute the most attractive place of this play-

Harley quinn, a living girl with love and hate, is strong and fragile, just like what she said in the film:“I’m a bad guy, not a bad person.”I am a bad guy, but I am not a bad guy.

In addition, "harley quinn" as aAdult oriented animationIt has really made many viewers hooked up.All kinds of violent and bloody large-scale scenesEven in animation, it is enough to make people stunned.

For example, as soon as the first episode came up, the clown and harley quinn robbed the rich together, and they always staged a heavy-flavored story of human skin masks, corrosive gas and various kinds of plasma flying around.

In the whole drama, broken hands and feet, brains bursting and bloody massacres are also one after another. In the second half, the human-body modified car is very Cult, plus all kinds of swearing.This series is rated TV-MA.It’s not surprising (not suitable for people under 17).

It is also worth mentioning that it is in harley quinn.A lot of comedy passages and spoofsFrom classic movies to American social life, none of them has fallen behind, and friends who like to dig up all kinds of tributes and allusions should be very happy.

For example, Harry and his party are going to steal the stealth motorcycle from the top floor of Wayne Building. Ivy asks "How do we get the car down", and Harry replies "Using the method in Speed ? ? 7".

For another example, in an episode in which everyone enters Harry’s memory, a large number of childhood Harry attacks them. This friend who is familiar with film history can immediately see that it is a tribute to the settings in classic horror films such as The Exorcist.

These ridicules and tributes are full of the whole drama, plus various comic stalks from the original work. Although "harley quinn" has only 13 short episodes,The rhythm is compact and the amount of information is overwhelming.It is a cool drama that has been watched in one breath recently.

In the case of a real-life version of the street, this "harley quinn" has earned a lot of face for DC. After all,"Real people watch Marvel Comics, animation watches DC."The general trend has not been broken.

With the end of Marvel Comics’s ten years, the Marvel Universe has a huge momentum in terms of live-action movies. DC is not only slightly inferior in quantity and influence, but also slightly better in quality by relying on the recent swords of Aquaman and Shazam!.

However, when it comes to animation, the DC universe is gaining momentum. A few years ago,Teen titans series,Lego DC series, are quite worthy of attention, and the earlier animated series Batman is also quite popular.

In Marvel Comics, the series "The Rise of Marvel Comics" in recent years tells the story of young The Avengers, but it has always had a bad reputation because it is too simple.

Young Titan Attack Movie Edition

In fact, whether it is a live-action version or an animated series, what the audience wants to see, or a superhero image that is consistent and different from what they think, such as "harley quinn", which can surprise us, the more we hope, the better.

Note: Some pictures in this article are from Douban and the Internet. If there is any infringement, please contact us actively.