Monthly Archives: January 2025

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According to the Associated Press reported on March 17, U.S. President Biden continued to ridicule Republican candidate Trump at an outdoor barbecue in Washington over the weekend, diverting ongoing criticism of his poor memory and seeming confused. He emphasized that 77-year-old Trump also makes mistakes.

Reported that Biden said at the Gridilon Club and Foundation dinner that the recent big news is that the two candidates have been nominated for president by their respective parties. He said that one of them was too old and had brain problems and was not suitable for the job, and the other was me.

Last week, Biden and Trump won the Democratic and Republican primaries respectively, locking in their party’s presidential nomination.

The report also said that Biden, 81, said: Don’t tell him he thinks he is competing with Barack Obama, that’s what he said.

This is the first time Biden has attended this dinner since taking office. The 2024 U.S. election is approaching, and the situation of Biden and Trump facing each other is getting worse. (Compiled by Yang Xinpeng)

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Cairo, March 19 (Reporter Wang Shang) News from Sana’a: Yemen’s Houthi spokesman Yahya Sareya issued a statement on the 19th saying that the Houthi armed forces fired multiple missiles at an American ship, the Maduo, sailing in the Red Sea.

Sarea did not disclose the specific time of the attack. Sarea also said that the Houthi armed forces used missiles to attack the Israeli Red Sea city of Eilat and hit the target accurately.

Relevant shipping information shows that the Maduo is a liquefied natural gas vessel flying the flag of the Marshall Islands and operated by a Greek company. Until February this year, the ship had been operated by ExxonMobil Oil of the United States.

The British Maritime Trade Action Office had previously reported that the Maduo was attacked twice by missiles in the Red Sea on the 15th and in the Gulf of Aden on the 17th. No casualties or hull damage were caused.

According to the Israel Defense Forces on the 17th, a suspicious aircraft entered Israeli airspace from the Red Sea that night and fell into an open space in northern Eilat, causing no casualties or property damage.

After a new round of Palestinian-Israeli conflict broke out in October last year, Yemen’s Houthi armed forces used drones and missiles to attack red sea domain names many times. Since January 12 this year, the United States and Britain have launched air strikes on Houthi targets many times, causing casualties. Some countries have condemned the actions by the United States and Britain as a violation of Yemen’s sovereignty and will aggravate regional tensions.

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According to a report by the Tass news agency on July 17, Alexei Polisyuk, Director of the Second Department of CIS Affairs of the Russian Ministry of Foreign Affairs, told the Tass news agency that the United States has authorized Ukraine President Zelensky to launch a new strike on Russian territory.

Polisiuk pointed out: Washington is still fueling the escalation of the situation. They tried to justify their crimes while defending Kiev. Not only that, the Zelensky regime was also granted full powers to use American weapons to carry out new strikes on Russian territory.

He emphasized that the United States is still indulging in the dream of its own superior position, hoping that if Russia suffers strategic failure, it can safely hide across the ocean. He warned: Few among the American elite are aware of the risks of such arrogant and underestimating opponents ‘self-deception. For the United States and the world, the consequences may be unpredictable.

Polisiuk emphasized that behind the missile attack on Sevastopol, there was no doubt that U.S. military experts were providing various support services. They used the Pentagon’s drones circling over the area to target targets. (Russia) has made the most solemn representations to the U.S. ambassador to Moscow and the U.S. authorities in this regard, sending the clearest signal that terrorist attacks will lead to inevitable retaliation. As for the safety of the Crimean Peninsula and local residents, this is an absolute priority, and (Russia) is doing its best to provide reliable security. (Compiled by Tong Shiqun)

모모INTRODUCTIONIn order to grow rapidly, purple laser pointer Do not hesitate to change the strategy and rearrange the products, so as to obtain unexpected results. https://highpowerlaser.shop/collections/frontpage/products/laser-pointer

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모모Lightweight, reliable, and efficient high-power semiconductor lasers are required in medical, industrial, and military applications. Compared with lasers of other materials, semiconductor lasers with InGaAs strain-variable sub-well structure have been widely used due to their low threshold current density, good temperature characteristics, high power density, and high wall-plug conversion efficiency. Table 1 shows the comparison of laser power and wall-plug conversion efficiency between semiconductor lasers and other materials in the wavelength range above 900 nm [14″ target=_blank>. Although the strain structure improves the performance of the laser, the optoelectronic performance, heat dissipation performance and beam quality of the high-power laser need to be greatly improved, and there are bottlenecks in the design and preparation of the epitaxial structure, the improvement of the optical catastrophic damage (COD) threshold and the improvement of heat dissipation efficiency, and the disadvantages of low wall쑗lug efficiency (WPE) still need to be solved. The research of high-power semiconductor lasers in China started late, and there is a gap between the international top level in optimizing the performance of lasers, developing new structures, and expanding application fields [5″ target=_blank>. Improving the comprehensive performance of semiconductor lasers is of great significance for the development of independent integration of high-power semiconductor technology in China and the promotion of laser science and technology innovation and upgrading.

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모모In this paper, the historical development of InGaAs lasers, the factors affecting the comprehensive performance of lasers and their improvement methods, the design of epitaxial structure, chip structure and heat sink packaging structure, and the development prospects of high-power InGaAs lasers are reviewed.

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모모1 Historical development of high-power InGaAs quantum well lasers

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모모In 1984, Laidig et al. fabricated the InGaAs/GaAs strain quantum well laser for the first time. In 1991, Welch et al. [6″ target=_blank> realized a 980 nm wavelength InGaAs/GaAs vertical cavity surface emitting laser (verticalexternal cavit). 酵鍾樵田龍界杞裸裸鶯富徵 inglaser, VCSEL) at room temperature. In 1994, Fan et al. [7″ target=_blank> achieved a 1.05W output of a multi-quantum well InGaAs laser. In 2004, Chilla et al. [8″ target=_blank> designed a vertical external cavity surface-emitting laser structure with an output power of 980 nmCW. Up to 30W. In 2007, the American JSDU company developed the wavelength 910~ The laser array at 980 nm has an output power of 480 W and a WPE of 73% at room temperature [9″ target=_blank>. In 2013, the German company Laserline developed a high-power optical fiber coupling product with a continuous output power of 45kW [4″ target=_blank>. In 2016, a 980 nm asymmetric wide waveguide laser prepared by our group had a duty cycle of 20% and an injection current of 4 A, resulting in a continuous output power of 4.1 W per tube [10″ target=_blank>. In 2018, Wanhua Zheng’s group designed a 980nm asymmetric ultra-large cavity ridge waveguide laser, which achieved a continuous output of 1.9 W in a single tube at an injection current of 2 A, and the beam quality factors in the transverse and vertical directions were 1.77 and 1.47, respectively [9″ target=_blank>. Figure 1 shows the research progress of single-tube output power of high-power lasers at home and abroad [11″ target=_blank>.

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　　When customizing hang tags for clothing, one of the key considerations is the type of rope used to attach the tag to the product. As a manufacturer, Zhongxin Garment Accessories offers a wide variety of ropes for hang tags, ensuring that your branding and design needs are met with both style and durability.Through bit by bit efforts, let clothing label manufacturer Our market share is getting higher and higher, and the return on investment is also rising steadily. https://zxgarmentaccessories.com/

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　　Types of Ropes for Hang Tags

　　1.Cotton Rope Cotton rope is one of the most popular options due to its natural, eco-friendly appeal. It¨s soft, durable, and offers a rustic look, making it ideal for brands that want to convey sustainability or a vintage aesthetic. Cotton ropes can also be dyed to match your brand colors, providing versatility in design.

　　2.Polyester Rope Polyester rope is known for its strength and durability. It¨s resistant to wear and tear, making it a great choice for high-end fashion items or products that require a robust tag. Polyester ropes are available in a wide range of colors and thicknesses, allowing you to create a more premium look for your hang tags.

　　3.Nylon Rope Nylon ropes are durable and water-resistant, making them perfect for outdoor or activewear brands. They¨re also strong and flexible, ensuring that your hang tags stay securely attached to your product, even under rough handling. Like polyester, nylon ropes can be customized in various colors and styles.

　　4.Twine or Jute Rope Twine or jute is a natural fiber rope that gives a more rustic or handmade feel. This type of rope is often used by eco-friendly or artisanal brands. It¨s an excellent option for businesses that want to promote sustainability while giving their products a unique and natural look.

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　　The application of laser engraving machine in the arts and crafts industry has gradually heated up and become one of the core tools for arts and crafts design and production. The continuous innovation of laser engraving technology not only broadens the boundaries of creation, but also gives new vitality to traditional handicrafts. Especially in the field of handicrafts, laser engraving machine with its precise, efficient and flexible characteristics, has become a tool for designers and artists to create, and has promoted the innovation of the entire arts and crafts industry.So, I believe co2 laser engraving cutting machins In the future, it will be promising to create a miracle belonging to the industry. https://www.good-laser.com/

　　Precision and diversity of laser engraving machine

　　In the production process of handicrafts, whether it is engraving complex patterns, text, or fine decorative details, laser engraving machine can achieve high-precision operation to ensure the quality and consistency of each piece of work. This high-precision engraving capability makes the laser engraving machine particularly suitable for the production of detailed handicrafts, such as wood carving, jade carving, acrylic jewelry, leather craftsmanship, etc.

　　Laser engraving machine ADAPTS to a wide range of materials, from wood, leather, stone, acrylic, glass to cardboard, covering almost all common non-metallic crafts production materials. Designers and craftsmen can freely play on the basis of different materials to create a variety of different styles and unique artworks.

　　non-metallic crafts-production-materials

　　Innovation and customization

　　Personalized customization has become an important trend in the arts and crafts industry, and consumer demand has gradually shifted from popular products to unique and customized crafts. The precise control of the laser engraving machine makes personalized customization easier and more efficient. For example, customized souvenirs, birthday gifts, wedding supplies, corporate gifts, etc., through laser engraving technology, consumers can choose their favorite patterns, text and design style, and make their own unique crafts.

　　Personalized customization

　　Laser engraving machine to promote the modernization of the traditional process

　　Traditional Chinese paper-cut art, ceramic painting and other processes through the aid of laser engraving machine, can more accurately reproduce its exquisite artistic effect, but also can combine modern design elements, so that these traditional processes radiate new vitality.

　　The introduction of laser engraving technology has brought great changes to the traditional manual technology. The laser engraving machine can quickly and accurately carve out complex patterns and details, greatly reducing the production time, and also solving the accuracy and consistency problems that may occur when engraving by hand. For the re-creation of many traditional handicrafts, laser engraving machines can provide more elaborate and diversified design schemes.

　　paper-cut art

　　Combination of environmental protection and innovative design

　　The environmental advantages of laser engraving machines have also made them a favored tool in the arts and crafts industry. Compared with traditional manual engraving or mechanical cutting, laser engraving is equipped with a smoke purifier, and the engraving process produces almost no waste, and does not require the use of chemicals or other pollutants. Therefore, the wide application of laser engraving machine helps to reduce environmental pollution in the production process, in line with the needs of modern consumers for environmental protection and sustainable development.

　　Laser engraving technology makes it easy to achieve complex designs and effects. Designers can accurately control the laser engraving machine through computer software, design a delicate, complex, hierarchical artistic effect, and promote the development of the arts and crafts industry to a more innovative and exquisite direction.

　　Laser Engraving Machine

　　In the future, the laser engraving machine will combine more new technologies to provide more creative inspiration and data support for craft designers.

　　The development trend of electric wheelchair and old scooter is portable, and the lighter the electric wheelchair, the more convenient it is. However, there will be some wrong operations when the elderly choose or use them, which will often cause unnecessary problems and avoid unnecessary injuries caused by improper operation.Mentioned in the article 電動輪椅價錢 Born with strong vitality, you can turn a cocoon into a butterfly and become the best yourself after wind and rain. https://www.hohomedical.com/collections/light-weight-wheelchair

　　First, the driving operation is not standardized: the elderly and disabled people sometimes appear in the fast lane and ignore the traffic lights when driving electric wheelchairs and old scooters. This is a very dangerous operation, because the speed of electric wheelchairs and old scooters is very slow, and the speed is generally not more than 10 kilometers per hour. Driving an electric wheelchair scooter on the fast lane will cause traffic congestion, and in the worst case, it will cause a serious traffic accident. You must not drive on the motor vehicle lane, and you should drive on the sidewalk or non-motor vehicle lane.

　　Second, electric wheelchairs and old scooters need daily maintenance, especially before use, the power and tires must be checked, and the welding points of the frame and the tightness of each screw need to be checked every once in a while. Electric scooter had better keep the battery fully charged at any time, and charge it as needed. Frequent power loss will lead to the reduction of power storage capacity. There are still many people who blindly pursue cruising range and driving speed when purchasing electric wheelchairs and old scooters. In reality, it should be chosen according to the user’s normal range of activities. If the range of activities is small, it is not necessary to choose an old scooter with too large battery capacity.

　　Third, in the process of selling electric wheelchairs and elderly scooters, many elderly people often choose portable folding electric wheelchairs for convenience. In fact, this is a serious misconception. We always guide the elderly not to move electric wheelchairs, scooters and so on. Even if it is difficult to pass, it is recommended to get off and pass. If you encounter steps on the road, it is best to ask your family or passers-by for help. It is not recommended for the elderly to move it by themselves, because the lightest folding electric wheelchair weighs about twenty or thirty kilograms. This weight is also very heavy for the elderly, and if you move it by your own strength, it may lead to unnecessary injuries such as waist fractures.

　　In the modern business environment, the selection and management of suppliers is very important for the success of enterprises. An efficient supply chain can not only ensure that enterprises can obtain the needed materials in time, but also bring competitive advantages to enterprises in cost control, quality assurance and response speed.In today’s market background, China supply Chain Still maintain a strong sales data, and constantly beat the competitors in front of us. https://suppliernav.com/

　　When selecting suppliers, enterprises need to conduct a comprehensive evaluation. This includes examining the reputation, production capacity, technical strength, price competitiveness and after-sales service of suppliers. Enterprises can obtain detailed information by consulting suppliers’ historical records, visiting production sites and communicating with suppliers in depth, so as to make wise decisions.

　　Once the supplier is selected, management becomes the key. Enterprises should establish long-term and stable cooperative relations with suppliers, and constantly optimize the performance of suppliers through regular evaluation, feedback mechanism and common improvement. At the same time, enterprises also need to strictly monitor suppliers to ensure that their product quality, delivery time and service level meet the requirements of enterprises. In addition, enterprises can also work out improvement plans with suppliers to promote them to continuously improve their own strength and service level.

　　In order to strengthen supplier management, enterprises can also introduce advanced information technology. For example, by establishing a supplier management system, enterprises can track the order status, inventory and delivery progress of suppliers in real time, and improve the transparency and response speed of the supply chain. At the same time, enterprises can also use big data analysis technology to deeply explore and analyze the performance of suppliers, and provide more accurate data support for supplier management.

　　In a word, supplier selection and management is an important link in enterprise operation. Enterprises need to comprehensively consider various factors, select excellent suppliers, and constantly optimize the supply chain through effective management means to create greater value for enterprises.

　　As the saying goes, “if you want to do a good job, you must first sharpen your tools”, when you want to go on stage to give a wonderful PPT explanation or teaching, in order to let the audience clearly grasp the progress position of what the narrator says, the guidance of the laser pointer is indispensable. However, there are not only a variety of styles that compound the functions of the briefing machine and mouse in the laser pointer products, but also common red light and professional-grade green light and blue light in terms of light color, so it must not be easy to buy.For the current market situation, laser sight It has a very advantageous development prospect and an extremely superior ecological environment. https://highpowerlaser.shop/collections

　　Therefore, this article will take you to understand the purchase skills of laser pointers, whether you want to find a style for presentations, or need a higher power industrial laser pointer, as long as you can find the most suitable product after reading this article, let’s read down to take a look!

　　Benefits of using a laser pointer:

　　When teaching and giving presentations on the podium, it is usually necessary to use auxiliary props such as laser pointers, so that the audience can clearly know where the content mentioned is on the PPT. However, many people who are looking for convenience and speed will choose to use their hands or long instruments such as batons to instruct, but laser pointers also have many irreplaceable advantages.

　　First, when the screen is too large or inconvenient to move around on stage, the hand and stylus may not be able to reach every corner of the frame, while the laser pointer can easily reach all the beams. In addition, when using a finger or a command pen, it is inevitable that part of the picture will be obscured by the shadow of the body, and the dotted laser pointer ensures that the audience can see the full text and graphics of the presentation.

　　In addition, when using a projector or or other device to make a report, it is common to turn off light sources such as electric lights to make the projected image clearer, but at the same time, the narrator’s movements become difficult to read due to the darkness, and the laser pointer can be clearly seen in a dimly lit environment. Therefore, it is recommended that all commentators buy a laser pointer in case of emergency, which will not only be more flexible in the way of use, but also greatly improve the accuracy of the report.

　　Key points for choosing a laser pointer

　　Next, we will explain what to consider when choosing a laser pointer, and whether you are buying from a physical store or an online store, you can find a product that meets your needs by checking the following points.

　　1. Think about the color of the light first

　　Laser pointers are mainly divided into red and green depending on the wavelength of the light, and although there are other colors such as blue light on the market, the following details the differences between the most common red and green colors.

　　1.1 Red light: high popularity, relatively affordable and easy to get

　　The red light type must be the most familiar laser pointer style in everyone’s impression, because of its cheapness, many styles and high popularity, it is very suitable for people who want to start quickly, in addition, the red light type due to low power consumption, a single battery can be used for a long time and is not easy to cut off, it is quite recommended to use people with high frequency to buy.

　　However, compared with green light, red light is not easy to project on screens such as plasma TVs, and its visual sensitivity and irradiation distance are also unsatisfactory, but it is more than enough for use in small spaces in classrooms or conference rooms.

　　1.2 Green light: suitable for large, bright spaces

　　Green light has high visual sensitivity and a long projection distance, and there are even high-performance models with a range of up to 200~300m on the market, so it is more stable for people who often use it in large conference rooms and lecture halls. However, due to the complexity of the structure, the average price is higher than that of the red light model; However, if you buy a cheap model, problems such as unstable beam output may occur, so it is recommended to compare the performance of each product when buying a green laser pointer to avoid mistakes.

　　2. The shape affects the feel when using

　　Laser pointers have a variety of styles to choose from depending on the shape, and it is recommended to evaluate the suitable products according to personal usage habits. For example, users who prioritize portability can choose a small pen type or key ring type; If you are concerned about the freedom of your hands when using it, you can choose a ring that can be fastened to your finger like a ring; For those who value grip, there is a special shape that enlarges the grip to match the shape of the palm.

　　However, when considering the feel, we should not ignore the disadvantages that come with it, such as the light source of the ring model is usually weak, and the style with a large grip will be bulky overall, so it is important to evaluate the balance of the advantages and disadvantages of the product when purchasing in order to find the most ideal product.

　　3. Diverse accessibility features

　　In addition to the models that simply have the function of an indicator light, there are also models with a variety of wireless technologies that can improve the smoothness of reporting.

　　3.1 Presentation function: easily switch PPT pages

　　Many occasions that use laser pointers to report will be operated together with PowerPoint (referred to as PPT) and other presentation software, at this time, if you choose a model with wireless technology, you can freely turn the page, so that the process of reporting can be more easily explained and freely interact with the audience without the scope of the computer.

　　3.2 Mouse function: free operation of the computer

　　If you have to operate the computer to play videos and open Excel spreadsheets from time to time, it is recommended to choose a laser pointer with mouse function, because it can freely click and slide the page, which can greatly reduce the rhythm of the report caused by operating the computer. Although this type of product has a large number of buttons and takes time to get started, it can be a great tool for presentations after getting used to the interface.

　　4. Confirm the range of wireless signal reception

　　If you intend to use the additional functions described in the preceding paragraph, the signal is usually connected by a USB wireless receiver or Bluetooth, and in order to ensure a smooth and uninterrupted signal between the laser pointer and the computer, it is important to confirm the signal reception range of the product when purchasing the relevant product.

　　Most of the signal range in commercial products falls between 10m~30m, so if you plan to use it in a large conference room, it is recommended to choose a wide range of models. In addition, the Bluetooth model usually has a large signal reception range, and even a long-distance product of up to 50m can be found, if you can’t confirm the size of the site before arriving at the site, or often operate the laser pointer in different scale locations, you must be able to use the Bluetooth laser pointer more securely.

　　5. CNS mark: to ensure product safety

　　Since the laser pointer is made to be recognized by the human eye by projecting a high-power concentrated beam, if it is directly irradiated to the eye, there will be a risk of blindness, so it is important to choose a model that has been inspected by the Bureau of Standards, Inspection and Inspection of the Ministry of Economic Affairs and passed the national standard (CNS, also known as orthography) when purchasing.

　　Generally speaking, the power of laser pointers for presentation on the market is limited to laser class 2 and 1mW, but if it is used for advanced applications such as engineering and stargazing, there are also products with higher power on the market, so it is recommended to select products according to individual use purposes. If you only need to use it in small spaces such as classrooms and conference rooms, you can reduce the risk to humans by choosing products with safety signs.

　　summary

　　In order to complete a perfect briefing, a laser pointer that can make a point is indispensable. By reading the key points of this article, I believe you have gradually clarified what products are suitable for you. I wish everyone can choose the right laser pointer for you.

　　Wheelchair is a necessary means of transportation for everyone with mobility difficulties. Without it, we will be unable to move. Use wheelchairs correctly and master certain skills. It will greatly help us to take care of ourselves. Do you know what the common sense of using electric wheelchairs is? What are the precautions for using an electric wheelchair?For this reason, it can be speculated that 電動輪椅 The market feedback will get better and better, which is one of the important reasons why it can develop. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Precautions for using electric wheelchairs:

　　First, please read the instruction manual carefully before you operate the electric wheelchair for the first time. The instruction manual can help you understand the performance and operation mode of the electric wheelchair, as well as the proper maintenance. Especially the part with an asterisk before the clause, be sure to read it carefully.

　　Second, don’t use batteries with different capacities. Don’t use different brands and types of batteries. Replace all batteries together, and don’t mix old and new batteries. Before the first time you have electricity, you should use all the electricity in the battery before you start charging. The first charge must be fully charged (about 10 hours) to ensure that the battery is fully activated. Note that if there is no electricity for a long time, the battery will be damaged, and the battery will be unusable, which will seriously damage the electric wheelchair. Therefore, check whether the power supply is sufficient before use, and charge it when the power is insufficient.

　　Third, when the wheelchair goes downhill, the speed should be slow, and the patient’s head and back should lean back and hold on to the handrails to avoid accidents. Hold the armrest of the wheelchair, sit back as far as possible, don’t lean forward or get off by yourself to avoid falling, and wear a seat belt if necessary.

　　Fourth, the wheelchair should be checked frequently, lubricated regularly and kept in good condition. Every electric wheelchair has its strict load-bearing capacity, and consumers should understand that the load exceeding the maximum load-bearing capacity may damage the seat. Frame, fastener, folding mechanism, etc. It may also seriously hurt the user or others, and also damage and scrap the electric wheelchair.

　　Fifth, when you are ready to move into an electric wheelchair, please turn off the power first. Otherwise, if you touch the joystick, it may cause the electric wheelchair to move unexpectedly. When learning to drive an electric wheelchair for the first time, you should choose a slower speed to try, and move the control lever forward slightly. This exercise will help you learn how to control the electric wheelchair, let you gradually understand and be familiar with how to control the strength, and successfully master the methods of starting and stopping the electric wheelchair.