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　　[PConline sea election shopping guide]Some time ago, Nubia launched two new products, Z17S and Z17miniS. Among them, Nubian Z17S is a flagship mobile phone. Compared with Z17, this machine has some changes in appearance, adopting a borderless full screen, and it is still powerful in hardware configuration. At present, in Suning.cn, the price of Nubian Z17S is 2999 yuan, and now the reserved consumers can enjoy six interest-free concessions, so don’t miss out on those who plan to buy it.

　　Nubian Z17S combines the concept of borderless and full screen. The upper and lower foreheads of the whole machine are extremely narrow, and there are almost no borders on the left and right sides, accounting for 90.35% of the screen. Although the screen size of Nubian Z17S reaches 5.73 inches, the width remains at about 72mm, which is equivalent to the width of an ordinary 5.2-inch mobile phone, and there is no pressure to hold it with one hand.

　　Nubian Z17S has a dual 5-megapixel camera in front and a brand-new dual-camera scheme in the rear. It has a dual-color camera with 23 million pixels and 24 million photosensitive and focusing units (2× 12 million pixels), adopts an exclusive customized depth-of-field chip, supports 17-level background blur adjustment, full-pixel dual-core focusing, supports double-camera zooming, and can achieve multi-point focusing (25 focus points) at the SLR camera level.

　　In terms of hardware configuration, Nubian Z17S adopts Opteron 835 processor, with built-in 6GB/8GB memory, and the storage capacity is available in two options: 64GB and 128GB. In terms of system, Nubian Z17S runs nubia UI 5.1 customized based on Android, and its battery capacity is 3100mAh, which supports 26W fast charging. In terms of color matching, it has two colors: aurora blue and black gold.

　　Editor’s comment:From all aspects, Nubian Z17S has reached the flagship level, especially the full-screen borderless design, which makes the whole machine look more beautiful. If you plan to buy a powerful full-screen mobile phone, you can consider Nubian Z17S.

Nubian Z17S (NX595J) 6GB+64GB black gold mobile Unicom telecom 4G mobile phone borderless.　

Product price: 2999 yuan

Seller: Suning.cn.

Related links:Enter the purchase

Soda futures continue to rise

The price of soda ash futures rose for the eighth consecutive trading day, with the main intraday increase exceeding 3%, reaching the highest point of 1964 yuan since March 7. This round of price increase is mainly influenced by the domestic macroeconomic data. The overall atmosphere of the chemical sector has warmed up, and some soda enterprises have closed orders or temporarily reduced production, which has promoted the continuous rise of the futures price. Market bulls actively followed up and market sentiment was boosted.

Huawen Futures Investment Research Team pointed out that the current price of soda ash futures is close to the cost line of high-cost ammonia-alkali method, which has formed a certain supporting role. Some soda production enterprises have planned to close orders or temporarily reduce production and adopt the strategy of price protection. Recently, maintenance and resumption of production coexist, supply disturbance is enhanced, and the price fluctuation of soda ash is intensified. In addition, the production and sales of downstream float glass rebounded, the demand for replenishment increased, the tentative price increase in Shahe area, the upward price of photovoltaic glass, and the commissioning of new production capacity all supported the spot and futures prices of soda ash.

In the spot market, the domestic price of soda ash fluctuated and adjusted, and some enterprises closed orders and raised prices at low prices. China National Salt Kunshan gradually resumed production, and the supply side fluctuated and adjusted, and the enterprise mainly delivered goods. The downstream demand fluctuates little, and the market sentiment is cautious. It is expected that the soda ash market will remain stable and volatile in the short term.

On the supply side, some soda plants have been overhauled recently, which has eased the supply pressure. The adjustment of the cost of soda ash and the price of raw materials led to the differentiation of profits of different methods. The profit of ammonia-alkali method increased by 9.48 yuan/ton, while the profit of combined alkali method decreased by 45 yuan/ton. Despite the suspension of maintenance of some units, the operating rate of domestic soda ash still fell to 83.50%, and the output decreased last week, and the overall supply pressure was eased.

On the demand side, the demand of soda ash market has been sluggish recently, new orders have slowed down, and the market has a strong wait-and-see mood. However, some downstream banks have replenishment plans, and the overall demand remains stable. Although the downstream quotation stabilized, the transaction performance was weak.

The data shows that as of April 7, 2024, the total inventory of domestic soda ash manufacturers was 916,800 tons, an increase of 41,800 tons from the previous month or 4.78%. Among them, the light inventory is 370,000 tons, and the heavy inventory is 546,800 tons. This state of accumulation has put pressure on the market mentality, and the market wait-and-see mood has intensified.

Analysts believe that the current soda ash futures price is supported near the cost line of high-cost ammonia-alkali method. Some production enterprises adopt the plan of sealing orders and temporarily reducing production, and have the strategy of insuring prices. The supply disturbance is enhanced, and the price fluctuation of soda ash is intensified.

Huawen Futures Investment and Research Team predicts that the soda ash signing is still dominated by light soda in the near future. After the replenishment in the early stage, with the new production capacity put into production, the soda ash market as a whole is weak and difficult to change. The contradiction between strong supply and weak demand is obvious, and the accumulated pressure increases. Even if there is a rebound, it may only be a short-term phenomenon, and it is difficult to form a trend reversal. The cost line of ammonia-alkali process will continue to support the current price of soda ash. In the near future, soda ash futures may fluctuate widely near the cost line of ammonia-alkali method, so investors should enter the market cautiously.

The market pays attention to the US inflation data and the minutes of the Fed meeting.

While evaluating the economic situation and interest rate prospects, investors are also paying close attention to the US inflation data in March. Recent non-farm payrolls data and comments from Fed officials have made investors doubt about the time and frequency of interest rate cuts this year.

The non-farm payrolls report released last Friday far exceeded expectations, showing the resilience of the labor market. Minneapolis Fed President Kashkali said that according to the economic development, interest rates may not be cut this year.

The consumer price index (CPI) of the United States in March will be released at 20:30 tonight. Economists expect the monthly rate of CPI to increase by 0.3% and the annual rate to increase by 3.7%. Higher-than-expected data may aggravate people’s concerns about long-term high interest rates and reduce the market’s expectation of the Fed’s interest rate cut.

If the inflation data is higher than expected, it may aggravate the market’s worries about inflation, and the pace of interest rate cuts by the Federal Reserve may be hindered. Precious metals such as gold and silver may maintain linkage with the US dollar, showing an upward trend. If the inflation data is lower than expected, it may accelerate the pace of the Fed’s easing policy. The expectation of interest rate cuts in June may heat up, the US dollar may be under pressure, and precious metals such as gold and silver may maintain an upward trend. Of course, investors are not excluded from selling safe-haven assets such as gold and turning to high-risk assets such as stocks. At that time, gold and silver may fall under pressure.

In addition, the minutes of the Fed’s latest monetary policy meeting will be released at 2:00 am Beijing time on Thursday. At the meeting in March, the Federal Reserve kept the interest rate in the target range of 5.25%-5.50% for five consecutive meetings. Economists believe that Federal Reserve Chairman Powell’s speech at the meeting is biased towards doves, and the bitmap shows that officials think that interest rates may be cut three times this year. Prior to this, economists expected the Fed to reduce its forecast of interest rate cuts this year to two.

The minutes of the upcoming meeting will reveal the Fed’s discussion on the table reduction plan. At the beginning of the epidemic, the Federal Reserve purchased a scale of 5 trillion US dollars.

　　◎ Intern reporter Li Zhao Yu Dou Peng

　　From towering skyscrapers to small and exquisite chronograph watches, glass can be seen everywhere in life.

　　Peng Shou, deputy to the National People’s Congress, academician of China Academy of Engineering, chief engineer of China Building Materials Group and president of China Building Materials Research Institute of Glass New Materials, said in an interview that it is necessary to vigorously promote energy conservation and carbon reduction in the glass industry, so that the glass industry in China can "go green".

　　In fact, glass should not only "go green", but also be expected to "rejuvenate" — — With the increase of service time, glass will age, which is usually accompanied by the deterioration of physical and mechanical properties. In recent years, more and more attention has been paid to how to "rejuvenate" aging glassy substances and restore their properties.

　　At the end of 2022, Jiang Minqiang, a researcher at the Institute of Mechanics, Chinese Academy of Sciences, revealed a new mechanism for the rejuvenation of severely aging metallic glass through research, which deepened the understanding of the rejuvenation of glass structure. Relevant research results were published in Fundamental Research, a multidisciplinary English journal headed and sponsored by the National Natural Science Foundation of China.

　　Glass aging: a slow transition from disorder to order

　　To make glass "rejuvenate", we must first understand how glass "ages".

　　Jiang Minqiang introduced that from a microscopic point of view, glass is an amorphous solid with irregular structure. He gave an example to the reporter: in crystalline solids such as steel, atoms are arranged in an orderly manner like students sitting quietly in a classroom, showing a regular shape. In glass, an amorphous solid with irregular structure, atoms are just like students after class, running around the campus, showing a disorderly arrangement.

　　The phenomenon of glass aging, in essence, is the transition of glass from the disordered state when it was initially formed to the orderly state. "Generally speaking, the total energy of matter is higher in disorder state, while in order state, the total energy of matter is lower. As time goes on, glass will gradually change from a high-energy state to a low-energy state. This process is generally called glass aging. " Jiang Minqiang explained that if the aging time is long enough, or the aging is accelerated by heating up, the glass can even be transformed into a solid crystal with a regular structure.

　　Glass aging will affect many properties of glass, such as toughness, optical properties and electrical conductivity, which is a phenomenon that people want to delay or even avoid. Therefore, as a process of reversing glass aging, glass rejuvenation has long been widely concerned by researchers.

　　"The rejuvenation of glass is the reverse process of glass aging, that is, the glass that makes the atoms relatively orderly after aging slowly returns to the relatively disordered state of atoms." Jiang Minqiang said. In the previous research on glass rejuvenation, the researchers found that the younger glass will release some enthalpy when it is heated to a certain temperature, and the higher the younger the glass is, the more enthalpy will be released during heating. Enthalpy is an important state parameter to characterize the energy of material system. Generally speaking, enthalpy is the energy released by young glass during heating.

　　"Our research believes that the above views do not apply to severely aging glass. With the increase of the degree of youthfulness, the enthalpy release of severely aged glass has not changed, or even has no enthalpy release at all. " The research of Jiang Minqiang’s team shows that the previous views on glass aging mechanism are not applicable to severely aging glass, which updates people’s understanding of the mechanism of glass structure rejuvenation.

　　"Unintentionally inserted willow": The research result is unexpected.

　　"In fact, the breakthrough of this research stems from our research team ‘ Unintentionally inserted willow ’ An attempt. " Jiang Minqiang said that the initial purpose of this experiment was only to prepare experimental samples. "Our team originally prepared samples for another experiment. In order to strengthen the scientific nature of the experiment, it is necessary to eliminate the thermal history of the samples and ensure that their structures are consistent. We anneal the glass samples at low temperature — — Slowly heat the metallic glass to a certain temperature and keep it for enough time, and then cool it to room temperature at a certain speed. " Subsequently, the research team rejuvenated these glasses in a severely aging state through mechanical deformation. The result was unexpected — — "We obviously input energy into the glass through mechanical work. Why don’t these glasses release enthalpy and become younger?" This is contrary to the previous mainstream view.

　　This result puzzled the research team. In order to solve the mystery, in addition to measuring enthalpy, the research team also measured the high temperature of glass samples (450K— 750K) and low temperature (1.9K— 100K), and then the atomic vibration information and topological structure information of glass are investigated. "In the course of the experiment, the research team found that although the parameter of enthalpy release before glass transition remains unchanged in some cases, the effective enthalpy change during glass transition and the atomic vibration Bose peak reflected by low temperature specific heat will change accordingly." Jiang Minqiang further explained, "This shows that enthalpy release is not the only physical quantity reflecting the rejuvenation of glass."

　　When talking about why the enthalpy release remains unchanged, Jiang Minqiang once again explained with vivid examples: "If we put a ball in ‘ Concave ’ The concave part of the zigzag plane, this ball will naturally remain in place. This stable state is like severely aged glass. And if we put this ‘ Concave ’ The zigzag plane is inclined at some angles. Although the height of the recess, that is, the energy level of the glassy substance, remains almost unchanged, the glass state represented by the ball will become unstable, and then the phenomenon of glass rejuvenation will appear. "

　　The results show that, in addition to the previous mainstream point of view, the rejuvenation of glass can be directly reflected in the release of enthalpy, that is, the improvement of energy level, and can also be reflected in the inclination of energy plane, that is, the free volume can be redistributed in space through local structural rearrangement. "This is also the new mechanism of rejuvenation of severely aging glassy substances that we have discovered." Jiang Minqiang said.

　　Expand the scene: provide a broad application space

　　This study also found that with the glass entering a steady flow state, the above three physical parameters representing the rejuvenation will tend to saturation values, so it was first determined experimentally that the upper limit of the glass structure rejuvenation was a "frozen" steady flow state.

　　If water is used as an analogy, glass that forms liquid at high temperature is like water, while glass that solidifies at low temperature is like ice. "The limit of the rejuvenation of the glass structure is that the high-temperature glass liquid is suddenly frozen by rapid cooling, thus forming a similar ‘ Frozen running water ’ The material state. " Jiang Minqiang explained, "In this case, the glass will maintain almost the same material structure as the liquid state under the solid appearance, and its fluidity will reach the limit of current understanding."

　　The new mechanism of rejuvenation of glassy materials revealed in this study not only allows us to better understand the related causes and processes of glass aging in physical essence, but also has great potential application space in promoting the batch rejuvenation of aging glass. "The research team is currently communicating with companies engaged in glass production or research and development, trying to find a good combination point to promote technology to the market."

　　In addition, Jiang Minqiang also found that the new mechanism revealed in this study is also expected to be applied to the preparation of advanced metal materials.

　　"Generally speaking, the strength and toughness of metal materials cannot be both. With the increase of strength, toughness will decrease, and vice versa. " Jiang Minqiang said, "How to overcome this inherent inversion relationship is a problem that must be faced in preparing advanced metal materials with both strength and toughness."

　　The total energy level of high-strength metal materials at the microscopic level is generally very low. If energy is input by heating and other methods, it is almost impossible to try to improve the toughness of metal materials by raising the total energy level, which often requires extremely high energy input.

　　"If we can use the new mechanism discovered in this study to adjust the energy plane angle of metal materials when the total energy level is low, we can improve the disorder of atoms and enhance the toughness of metal materials while maintaining the macro strength unchanged. Through this method, we can effectively avoid huge energy input and greatly reduce the cost of preparing high-toughness metal materials. " Jiang Minqiang said that his team is constantly trying to make a decisive breakthrough and provide new ideas for solving the irreconcilable contradiction between the strength and toughness of metal materials for a long time.