مكتبة فور ريد

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مكتبة فور ريد الثقافية تهتم بنشر الكتب والروايات القيمة إلكترونيا لإنتشار الثقافة ومختلف العلوم لدي المواطن العربي في جميع أنحاء العالم , حيث تمكنك المكتبة من قراءة وتحميل و تقيم وإضافة إقتباس لأي كتاب او رواية متوفرة من خلال المكتبة , تضم مكتبة فور ريد علي ألاف الكتب والروايات والقصص العربية والأجنبية المترجمة إلي اللغة العربية لتكون متاحة أمام القارئ العربي

تحميل كتاب
تحميل رواية
كتاب pdf
رواية pdf

فتاة الياقة الزرقاء PDF

دير النعمان PDF

تحميل رواية مسغبة PDF

تحميل رواية الهدية PDF

 رجيم الكيتو دايت والذي يعتمد على تناول أطعمة بها دهون مقابل الاستغناء والتقليل من نسب الكربوهيدرات العالية، 

أضرار الكيتو دايت

توجد بعض الأضرار الناجمة عن اتباع أضرار نظام الكيتو دايت وسنذكرها لكم بالتفصيل وهي كالآتي:

الصيام المتقطع

إن الصيام المتقطع ارتكازه الكبير يكون على وقت تناول الطعام فهو 

 

فوائد التي تكمن وراء اتباع الصيام المتقطع

حيث أن الأبحاث قامت بالتوضيح بأن فوائد الصيام المتقطع

جدول للكيتو دايت

جدول كيتو دايت لخسارة الوزن 

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5G-Advanced Innovation

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Today, we are going to talk about the 5G-Advanced innovation’s dual-chain integration, five major forces, and three driving factors.

The subsequent “5G-Advanced Evolution White Paper” analyzed the 5G-Advanced network evolution architecture and technology development trends in detail for the first time, and strived to point out the direction to promote 5G to generate greater social and economic value.

Respondents believe that LTE or Wi-Fi cannot meet their current industrial needs, and people agree that 5G is more suitable for industrial applications. 28% of the interviewees believe that performance advantages force 5G to be preferred for scenarios requiring wireless in industrial networks.

Today, we talk about the several major benefits of NFC smart homes. Guess what are the benefits of NFC smart homes?

For applications in the era of interconnected smart homes, NFC technology can increase the ease of use, safety, etc. of equipment, and can greatly change the lifestyle of our daily homes.

As a short-field communication technology, NFC has a very wide range of applications, such as mobile payment, channel inspection, automobiles, smart homes, industrial control, and so on. With the continuous evolution of smart home scenarios, a large part of NFC devices will appear in the living room in the future.

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Today, we talk about the 5G NR MIMO Transmission ways. What are the required transmission schemes for NR MIMO?

There are three implementation options for the 5G NR beam assignment, which are analog, digital, and hybrid beam assignment. For these implementations, both multibeam-based and single-beam-based approaches should be considered. But what are the required transmission schemes for the 5G NR MIMO?

In LTE, single layer/multi-layer/TP/UE transmissions use a unified framework. Due to the flexibility of DMRS, these transmissions have good transparency. In 5G NR, multi-beam transmissions can also be seen as cooperative transmissions between multiple virtual TPs.

Considering the cost and complexity, when there are more antenna units and the number of RXUs is usually smaller than the number of originals.

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6 Characteristics of 5G NR Technology

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Today, we talk about the 5G NR technology and the 6 Characteristics of 5G NR Technology.

What is 5G NR technology?

The 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, referred to as 5G or 5G NR technology is the latest generation of cellular mobile communication technology, namely 4G (LTE-A, WiMax), 3G ( Extension after UMTS, LTE) and 2G (GSM) systems.

5G NR technology has set a new standard for wireless, opening up the spectrum above 6 GHz that has been previously unusable by cellular services.

Today, we talk about something about NB-IoT which you may not know.

NB-IoT refers to Narrow Band - Internet of Things (IoT) technology, which focuses on the Low Power Wide Area (LPWA) Internet of Things (IoT) market and is an emerging technology that can be widely used around the world.

Huawei, as the domestic leader in developing NB-IoT technology, has also attracted considerable attention from the technology community.

Q: How are the frequency bands for NB-IoT divided by domestic and international operators?

A: Most operators worldwide use the 900MHz band to deploy NB-IoT, and some operators deploy in the 800MHz band.

China Unicom's NB-IoT is deployed in the 900MHz and 1800MHz bands, and currently, only 900MHz is available for trials.

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13 Common IoT Communication Technologies

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Today, we talk about the wired and wireless IoT Communication Technologies, the simple 13 common communication technologies in IoT.

We have compiled and summarized the commonly used wired and wireless communication methods of IoT for future reference.

Communication frequency band: license-free frequency band. Use Industrial Scientific Medical (ISM) frequency band, 915MHz (U.S.), 868MHz (Europe), 2. 4GHz (Global)

Due to its wireless transmission characteristics, the adoption of RFID technology in logistics supply chain scenarios can bring a number of benefits. Here have 5 benefits of RFID in logistics supply chain.

Not only can it significantly improve efficiency, but it also opens a new window of digital information management. In general, the application of RFID technology in the logistics supply chain can bring the following benefits.

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13 Common IoT Communication Technologies

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Today, we talk about the wired and wireless IoT Communication Technologies, the simple 13 common communication technologies in IoT.

We have compiled and summarized the commonly used wired and wireless communication methods of IoT for future reference.

Communication frequency band: license-free frequency band. Use Industrial Scientific Medical (ISM) frequency band, 915MHz (U.S.), 868MHz (Europe), 2. 4GHz (Global)

What is an RFID warehouse management system?

RFID warehouse management system is a combination of RFID technology and warehouse management system to provide enterprises with a new storage model, to meet the needs of enterprise automation, transparency, intelligent storage, RFID technology, and warehouse management system to achieve a seamless docking, maximize the value of RFID technology applications in warehousing.

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6 Characteristics of 5G NR Technology

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Today, we talk about the 5G NR technology and the 6 Characteristics of 5G NR Technology.

What is 5G NR technology?

The 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, referred to as 5G or 5G NR technology is the latest generation of cellular mobile communication technology, namely 4G (LTE-A, WiMax), 3G ( Extension after UMTS, LTE) and 2G (GSM) systems.

5G NR technology has set a new standard for wireless, opening up the spectrum above 6 GHz that has been previously unusable by cellular services.

NB-IoT and LoRa account for 83% share of LPWAN market, low-power satellite IoT becomes a game-breaker, In-depth analysis of low-power wide-area (LPWAN) market in 2021.

According to the monitoring of IoT Analytics, in the second quarter and the third quarter of many countries because of the epidemic quarantine, the number NB-IoT and LoRa of LPWAN-enabled device activation in 2020 still reached 450 million units, with a year-on-year growth rate of 62%, especially in the epidemic prevention and control and supply chain visualization play an important role in the rapid growth of IoT applications;

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5G NR Communication Technology And Characteristics

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Today, we talk about the 5G NR communication technology and its characteristics.

The current communication technology is mainly divided into two types: wired communication and wireless communication. Wired communication uses wired media for conduction, such as copper wire, optical fiber, and so on.

Data transmission in wired media can reach a very high rate, and the current maximum experimental rate of a single fiber can reach 26Tbps. But the bottleneck of mobile communication lies in the wireless communication part. The current mainstream mobile communication standard is LTE, with a theoretical speed of 150Mbps, which is much lower than the wired transmission rate.

While 5G has been a hot topic for years, there is still a great deal of work to be done behind the scenes in refining and effectively iterating on 5G standards.

5G NR (New Radio) Release 16 brings critical reliability and latency improvement technologies in several key areas, most notably an enhanced 5G URLLC base to deliver better link reliability (up to 99.9999%).

These networks have gained significant traction in industrial IoT use cases, enabling enterprises to deploy 5G industrial IoT networks with dedicated resources immediately, rather than waiting for broader 5G network deployments. Other benefits include specific optimizations for local applications and customized security and privacy settings when needed.

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9 Common Injection Molding Defects

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This article mainly describes 9 common injection molding defects and the causes and solutions for these injection molding defects.

During the injection molding process, the gate stacks to the sprue bushing, making it difficult to pull out. Opening the injection mold will crack and damage the product. In addition, the tip of the copper rod must be knocked out from the nozzle to loosen it, which greatly affects production efficiency.

Since it is difficult to machine the tapered hole of the sprue bush, you need to use standard parts as much as possible, and if you need to machine it yourself, you need to make it yourself or purchase a special reamer. The taper hole needs to be polished to Ra0.4 or higher. In addition, you need to have a gate pull rod or gate eject.

The injection mold acceptance standard is recognized from the product quality, mold structure, injection molding process requirements, etc., accordingly, the injection mold quality is evaluated.

The cooling water juice should be used in the plastic block insertion mouth, and the customer needs to request.

The hardness of the mold components should not be less than 50 HRC, or the surface hardening treatment hardness should be higher than 600 hV.

The reset spring should be used as a standard piece, and the spring should not be ground and cut.

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How To Solve The Deformation Problem of Flat Injection Molded Parts?

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Today, we talk about the tips for solving the deformation problem of flat injection molded parts.

The area of flat injection molded parts is large, and the shrinkage is also large. The molecular orientation of large injection molded parts is extremely serious, and the cooling of the injection mold is also uneven, which makes the shrinkage rate of the injection molded parts in all directions appear inconsistent, resulting in the deformation and distortion of the thin, large flat injection molded parts easily.

The injection mold acceptance standard is recognized from the product quality, mold structure, injection molding process requirements, etc., accordingly, the injection mold quality is evaluated.

The cooling water juice should be used in the plastic block insertion mouth, and the customer needs to request.

The hardness of the mold components should not be less than 50 HRC, or the surface hardening treatment hardness should be higher than 600 hV.

The reset spring should be used as a standard piece, and the spring should not be ground and cut.

(.pdf, 285K)

4 Causes of Burn Marks in Injection Molding Parts

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The common defects of injection molding parts include burn marks, and the causes of burn marks of injection molding parts are mainly four factors, namely melt rupture, improper control of injection molding conditions, mold failure, and raw materials do not meet the requirements.

Below are the 4 Causes of Burn Marks in Injection Molding Parts.

When it comes to molding defects, burn marks in injection molding are some of the most common. Why have burn marks in injection molding?

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When it comes to molding defects, burn marks in injection molding are some of the most common. Why have burn marks in injection molding?

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How To Adjust The Injection Molding Processes Of Temperature, Pressure, And Speed?

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After read, you can learn about how to adjust the injection molding processes of temperature, pressure, and speed.

Injection molding temperature measurement and control are very important in injection moulding

In order to counter the injection molding pressure, the locking mold pressure must be used, do not automatically select the maximum value available, and consider the projected area, calculate a suitable value.

This is the pressure that must be generated and transcended before the screw. Although the high back pressure is advantageous for the uniform and plastic melting of the color.

Below are the 18 basic injection molding technologies that injection molding technicians must know.

The melt usually flows from the nozzle into the nozzle, but in some injection molds, the nozzle is part of the mold because it extends to the bottom of the mold. There are also two main types of nozzles: open nozzles and closed nozzles. In injection molding, open nozzles should be used more because they are cheaper and less likely to stay.

Make sure that the nozzle is correctly connected to the nozzle bushing, and the top hole is slightly smaller than the nozzle sprue bushing.

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How to Adjust The Injection Molding Processes of Temperature, Pressure, and Speed?

Edit setfor How to Adjust The Injection Molding Processes of Temperature, Pressure, and Speed?

After read, you can learn about how to adjust the injection molding processes of temperature, pressure, and speed.

Injection molding temperature measurement and control are very important in injection moulding. Although these measurements are relatively simple, most injection molding machines do not have sufficient temperature tights or lines.

In order to counter the injection molding pressure, the locking mold pressure must be used, do not automatically select the maximum value available, and consider the projected area, calculate a suitable value.

This is the pressure that must be generated and transcended before the screw.

Below are the 18 basic injection molding technologies that injection molding technicians must know.

The melt usually flows from the nozzle into the nozzle, but in some injection molds, the nozzle is part of the mold because it extends to the bottom of the mold. There are also two main types of nozzles: open nozzles and closed nozzles. In injection molding, open nozzles should be used more because they are cheaper and less likely to stay.

Make sure that the nozzle is correctly connected to the nozzle bushing, and the top hole is slightly smaller than the nozzle sprue bushing.

(.pdf, 262K)