A novel as good as "Forward in Reverse"

1. [Forward Search]: - This was the most commonly used function of vlookups, and the formula was: Vlookups (search for values, search for regions, and lock the values in which column, 0/1). There were two points to note here. First, the first column of the search area was the column where the search value was located. Second, 0 meant precise search, and 1 meant rough search. In reality, 0 was often used for precise search. For example, if you want to find the quantity of each product in the seventh month, the formula can be: =VLOOkUP($AA14,$AA6:$AJ10,5,0). - To put it simply, the forward search was to find the data of a later column according to the first column of the search area (the column where the search value was located), such as finding the content of column C according to column B. 2. ** Reverse Search **: - When the search value is at the back of the search area, the normal vlook up will return an error value because the search value is not in the first column. At this time, you can use the reverse search method, the formula is: =VLOOkUP(find value,IF({1,0}, find the column of the value, return the data value),2,0). This formula uses the help of the IF({1,0}, the column where the search value is located, and the return data value). The purpose is to swap the position of the search column and the return column so that the search column is in the first column. For example, when the product is listed in the AK column (after the month), to find the value for July, you can use the formula: =VLOOkUP(AA14,IF({10}, AK7: AK10, AE7: AE10),2,0). - In general, reverse search was to search from right to left by constructing a virtual data column when the search value was not in the first column of the search area. For example, the contents of column A were found according to column B. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

For the motor, clockwise rotation was forward rotation, and counterclockwise rotation was reverse rotation. If the motor is driven by a three-phase power supply, when starting in the positive direction, connect the three-phase power supply, press the positive start button, the corresponding contactors are energized and self-locked, the main contact is closed and connected to the motor, and the motor runs in the positive direction when the phase sequence is in the normal order; if the two-phase swap connection in the three-phase power supply of the motor is arbitrarily swapped, the phase sequence will be reversed and the motor will rotate in reverse. However, the document did not explicitly mention whether there was anything special about the judgment of the positive and negative rotation of the motor of the Wuzheng tricycle. The above judgment of the positive and negative rotation of the motor was only for reference. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

In some situations, it is necessary to control the forward and reverse rotation of the frequency changer. Double switches can be used to realize the forward and reverse rotation start and stop. For example, a maintaining switch was connected to the forward rotation terminal of the frequency changer (some were FWD, here was DI1). When this switch was closed, the frequency changer would rotate forward. After the switch was opened, the frequency changer would stop directly. Similarly, another holding switch is connected to the reversing terminal of the frequency changer (some are REV, here is DI2). When this switch is closed, the frequency changer will reverse. When the switch is opened, the frequency changer stops running. If there is no external regulator, the frequency value of the frequency changer can be set through the panel. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

During normal cooling work, the fan of the air conditioner usually rotated clockwise. However, some air-conditioning units had an automatic cleaning function (such as Kelon air-conditioning units). After the cleaning function was turned on, the fan would rotate counterclockwise. Its main function was to blow off the soil on the outdoor unit's heat sink (cooler). There was no fixed mode, which was determined by the external fan used by the air conditioner manufacturer. However, the final effect was the same. They were all suction type, blowing forward. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The cervical vertebra was reversed and the head tilted forward. It was a disease that caused the physiological curvature of the cervical vertebra to change. The normal cervical spine showed a physiological lordotic curvature, but in this condition, the cervical spine showed a kyphosis that was opposite to the normal physiological curvature, and the head tilted forward. This condition was usually caused by external force on the cervical spine, poor posture (such as looking down at the phone, computer, etc.), or cervical vertebra disease. The patient may have neck stiffness, pain, muscle soreness, numbness of the shoulders and upper limbs, and other symptoms. In severe cases, it will increase the risk of cervical vertebrae disease, such as cervical disc protrusion, cervical vertebrae proliferating, cervical spinal nerve root disease, etc. There were various treatment methods, including medication, physical therapy, rehabilitation therapy, and surgical treatment. The specific plan needed to be evaluated based on the patient's condition, cause of disease, course of disease, and other factors. During the treatment period, the patient should follow the professional doctor's diagnosis and treatment recommendations, maintain good living habits, avoid maintaining bad postures for a long time, and pay attention to cervical health care to enhance the stability of the cervical spine and slow down the development of the disease. In terms of rehabilitation training, for example, McKenzie's rehabilitation therapy needed to follow the principle of gradual progression, that is, no weight, assisted training, weight training, assisted training, and finally, no assistance, weight training. One could not rashly perform difficult movements to avoid worsening the cervical spine problem. There were also some postures such as lion, frog, baby, and reclining that could help to improve related problems. The details were as follows: - Lion Lying: Straighten your legs, place your instep on the ground, and place a pillow on your waist to support it. Use your hands to support your upper body, which can gently strengthen your waist muscles. - [Frog Lying: On the basis of the Lion Lying, the legs are separated. The thighs are vertical to the calves, the toes are facing the sides, and the instep is flat. It can stretch the inner thighs.] - Baby lying: legs together, instep close to the ground, buttocks sitting on the heel, lying on the folded pillow, can relax the back muscles, improve the forward tilt of the hip. - Leaning back: Lying flat on the bed with a pillow under the knee, neck against the bed, head slightly tilted back, and the bed against the neck (to prevent spine sprains), helps to relax the shoulder and neck, improve the neck forward tilt and wealth bag. In addition, there are some actions that can relieve neck soreness, such as looking left and right, neck and hand confrontation, shoulder and neck stretching, etc. However, if self-exercise cannot relieve the symptoms, you should seek the help of a professional doctor in time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

It was impossible to determine whether the three-phase induction motor was rotating forward or backward based on the information given, because there was no information about the current connection, phase sequence, or motor operating state of the motor to determine its direction of rotation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

A forward agent is a server that is located between the client and the original server. In order to get the content from the origin server, the client sends a request to the agent and indicates the origin server. The agent then forwards the request to the origin server and returns the content to the client. It was a client agent, and its main functions included hiding the real IP address of the client, improving access security, and accelerating access speed (such as by cacheing common resources). It was usually used when the client could not directly access external network resources due to security or policies. A reverse agent is a server agent. When a client requests resources, the reverse agent server receives the request and forwards the request to a server in the internal network (such as a Web server, an application server, etc.) according to the configuration. After the internal server processes the request, it returns the response to the reverse agent server, and the reverse agent server returns the response to the client. Its main functions include Load Balancer (distributing requests to multiple servers to balance the load), cacheing (cacheing common resources to reduce server pressure), security protection (such as filtering malicious requests, authentication, etc.), and so on. It is mostly used in server cluster architecture. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following are some common situations when the motor is adjusted to the forward and reverse direction of the video: ** 1, 3-phase motor ** 1. ** Push button control ** - When the Forward Rotation button is pressed, the power supply is connected through the Forward Rotation Contactor coil (such as the KM1 coil) and the normally closed contact of the Reverse Rotation Contactor (KM2). After the coil of the forward rotating contactors is energized, the motor starts to rotate forward. At the same time, the normally closed contact of the forward rotating contactors (KM1) is disconnected, and the coil of the reverse rotating contactors (KM2) connected in series cannot be connected, so as to ensure that the reverse circuit is disconnected during forward rotation. - After the stop button was pressed, the reverse button was pressed again. The power supply was connected through the reversing contactors coil (KM2) and the normally closed contact of the forward contactors (KM1). When the reversing contactors were energized, the motor started reversing. At the same time, the normally open contact of the reversing contactors (KM2) was disconnected, and the series connected forward contactors (KM1) could not be connected. 2. ** Based on phase sequence adjustment ** - Reversing the motor only required changing the phase sequence. For example, in the relevant circuit, the positive and negative rotation of the motor can be realized by replacing the phase lines of the main contacts of the positive rotating contactors (KM1) and the reverse rotating contactors (KM2). ** 2. Small motor (Take X220 as an example, three wires)** - First, he used a Multimeter to set the resistance to the resistance level and measured the two wires with the largest resistance. - Then, find the smallest resistance. If there are multiple resistance values with the same resistance value (minimum resistance), such as red and green, you can try different combinations to connect the 220V power supply to achieve positive and negative conversion. For example, when red and yellow are connected, the motor will rotate clockwise (forward), and when red and green are connected, the motor will rotate counterclockwise (reverse). ** 3. Use the time relay to control the forward and reverse rotation cycle (take the forward rotation for 10 seconds and the reverse rotation for 10 seconds as an example)** - The basic circuit was modified by using a button to move the interlocked motor forward and reverse circuit of the contactors. - Similar to the indicator light flashing circuit (composed of two power-on delay time relay to control the power-on and power-off time of the indicator light), the indicator light was replaced by an intermediate relay, forming an infinite loop of 10 seconds of power-on and 10 seconds of power-off of the intermediate relay. - The normally closed contact of the intermediate relay was used to replace the forward button in the forward and reverse circuits, and the normally open contact was used to replace the reverse button. In addition, the start, stop, and stop circuits (used to control the start, stop, and loss of voltage protection of the circuit) could be used to achieve a cycle of 10 seconds of forward rotation and 10 seconds of reverse rotation. You can also use a continuous cycle time relay to set two sets of time (for example, T1 is 10 seconds for forward rotation and T2 is 10 seconds for reverse rotation). Press the start button, and the motor will rotate forward and backward according to the set time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The direction of switching output can be set by adjusting the rotation direction of pr0.00 (this operation has a certain influence on the forward and reverse rotation prohibition signal), or in the position mode, adjust the setting of the pulse pole of Pr0.06 command (this operation has no influence on the forward and reverse rotation prohibition signal). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Yes, the soft starter could control the motor to rotate forward and backward. The main function of the soft starter was to reduce the current impact when the motor was started. In addition to the basic starting protection function, modern soft starter usually also had the function of forward and reverse control. The soft starter controls the starting process of the motor by adjusting the voltage and frequency of the motor, thus achieving smooth start and stop. When controlling the forward and reverse rotation of the motor, there would be a set of circuits inside the soft starter to switch the power phase sequence of the motor. The phase sequence of the three-phase power supply of the motor determines the direction of rotation of the motor. Therefore, by changing the phase sequence, the forward and backward rotation of the motor can be realized. This phase sequence change was usually achieved through the control button on the soft starter panel or an external control signal. However, in practical applications, it was also necessary to consider whether the motor itself supported forward and reverse rotation, whether the soft starter had enough capacity to meet the starting requirements of the motor when it was in forward and reverse rotation, and whether the control system design could ensure the smoothness and safety of the forward and reverse rotation switching. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>