Clinical professionals can go to CDC
Publish: 2021-05-01 04:17:20
1. After graating from clinical medicine, I enter the CDC and can do any work. I can go to all departments. The most common ones are AIDS prevention and control, endemic diseases, chronic diseases and parasitic diseases. The work of CDC is a little easier than that of the clinical front-line departments in the hospital. The pressure is not as heavy as that of doctors. At least the night shift is less, but the treatment is lower than that of the hospital
2. It depends on what position you are applying for.
it's OK to have laboratory, clinical, public health and preventive statistics
it's OK to have laboratory, clinical, public health and preventive statistics
3. After graating from clinical medicine, I entered the center for Disease Control and prevention, with less pressure and less hard work, but low income and slow promotion of professional title. It's tiring to go to the hospital, but the future development prospect is better and the income is higher
4. tolerable. Through open recruitment. The salary is the same as that of doctors, and the actual income is lower than that of clinicians.
5. Clinical medicine majors can go to CDC, AIDS prevention and control department, health ecation department, chronic disease and endemic disease, parasitic disease prevention and control department, and other business departments. Personally, it seems better to go to township hospitals. It's hard for clinical medicine major to enter the title of CDC
6. CDC generally does not recruit clinical
it is not likely that new clinical professionals will enter health management posts, which are left to some people.
it is not likely that new clinical professionals will enter health management posts, which are left to some people.
7. Well, your question is very good. First of all, I can tell you clearly that you don't have to worry about it. As long as you study clinical medicine, you can definitely take the examination of clinical practitioner qualification certificate. Of course, you can also choose to take the examination of other practitioners. This is reported according to your personal wishes. The work unit can't have any restrictions on you, because now it's basically a contract system. You can resign at any time and choose another one Post and only accept online registration, so you don't have to worry about what restrictions will be imposed on you. Prepare your degree certificate, graation certificate, work certificate, and you can directly register online. In late March, the registration will be basically over. May test clinical operation, September test clinical theory
8. Direction? If there are enough social relations, we should follow the normal route; If it depends on their own ability and their own requirements are not high, it is recommended to pay more attention to the personnel websites of local governments. The posts and requirements of local CDC recruitment are basically publicized. In some places, CDC still needs clinical professionals and real talents, but these are few after all. Good luck! I hope my answer will help you.
9. (1) Before the scaffold is erected, the foundation shall be leveled and tamped, and there shall be no ponding around the scaffold foundation. A drainage ditch shall be set at 0.5m away from the outside of the external upright pole of the scaffold, and a ponding pit shall be set at the lowest point. The water flows into the pit and is discharged by submersible pump. The slope of the drainage ditch is 3-5 ‰. In order to ensure the bearing capacity of the scaffold foundation, the foundation trench backfill must be compacted step by step before the scaffold foundation can be made
(2) after the backfill soil is tamped, a layer of 0.2 mm thick is laid on it × After that, the steel base is placed on the wooden scaffold board, and the vertical pole is placed on the steel base. Then, the setting out and positioning are carried out according to the designed vertical pole spacing. The laying of the wooden scaffold board should be stable and should not be suspended< 3. Technical requirements of scaffold structure
(1) according to the requirements of scaffold structure, the project is a frame structure, which is used with inner and outer double bent. The distance between the inner vertical pole and the wall is 200 mm, the distance between the vertical pole and the cornice is 450 mm, the distance between the outer vertical pole and the wall is 1.2 m, the distance between the row of vertical poles is 1.2 m, the distance between the vertical poles is 1.8 m, the distance between the large horizontal poles is 1.8 m, the distance between the small horizontal poles is 1.5 m, the distance between the vertical poles and the vertical poles is 1.5 m The large cross bar shall be butted with straight fasteners. During the erection process, the neutral bar shall be erected on the outside of the large cross bar, the joints of two adjacent bars shall be staggered by one step and not more than 500mm, and the distance between the center of each joint and the main node shall not be greater than 1 / 3 of the step distance. The erection of vertical pole shall be vertical, and the erection of horizontal pole shall be horizontal. The verticality of vertical pole shall be 1 / 400, and the total height shall not be greater than ± 50mm, the erection of large cross bar shall be horizontal, and the horizontal difference of the whole length shall not be greater than ± 20 mm, the deviation of vertical distance and row distance of vertical pole is not more than 20 mm ± The distance of the small cross bar from the main node should not be more than 150 cm, and the extension length of the side close to the wall should not be more than 500 mm
(2) for the connection between the scaffold and the building, the height of the scaffold is connected with the floor column by short steel pipe on each floor, and the internal and external scaffold and the vertical pole or large cross bar are fastened with fasteners by tie rods. The vertical height of the pull joint is not more than 4 meters, and the layer by layer pull joint and horizontal spacing is not more than 6 meters, and a pull joint is set every other concrete column. When setting, it should be as close as possible to the main joint, and the distance from the main joint should not be more than 30 cm. The layout form is flower row
(3) six meter steel pipe is used to set up the cross bracing. There are seven vertical bars and seven large cross bars as a group of cross bracing. A group of cross bracing is set every six to form a 45 degree angle with the ground. The cross bracing is set on both sides of the corner at both ends of the scaffold. Each group of cross bracing should be set up continuously up and down. Besides the two ends of the diagonal bar are fastened with the vertical bar and large cross bar by rotary fasteners, two fasteners should be added in the middle, The distance between the fastener at both ends of the diagonal bar and the node of the vertical bar shall not be greater than 150 mm, the distance between the connection point of the lowest diagonal bar and the vertical bar shall not be greater than 200 mm, the overlapping length of the scissor strut shall be 1000 mm, and the fastener shall be fastened with three fasteners, and the fastener shall not be less than 10 cm at the end of the steel pipe. The lower end of the scissors must fall to the ground
(4) for the laying of scaffold board, the scaffold of the construction operation layer must be fully, stably and strictly paved, and the distance from the wall shall not be more than 200 mm. A scaffold board shall be laid between the inner vertical pole and the wall, and there shall be no gap and control board. The construction of this project is carried out from top to bottom, and only one operation layer is considered. For the scaffold board laid at the opposite end, two small cross bars must be set under the joint, The end of the board is 150 mm away from the small cross bar, and the scaffold board at the corner must be crossed and laid
(5) for the protection of the operation layer and the passageway, two protective railings shall be set at the height of 1.2m of the operation layer, but the dense mesh vertical net with the permit must be hung. The side rope of the vertical net shall be close to the large cross bar, and the rope shall be tied firmly, and the 180mm high skirting board shall be set instead of the wooden skirting board. A layer of pocket net is set at 3M away from the ground, and a safety passage is set at the south of the building. The opening is 3M long and 3M high, which is the same width as the opening. A layer of 50mm wooden scaffold board is laid on the top, and the signboard is hung
(6) sealing method between scaffold body and building: dense mesh vertical sealing, quality requirements of dense mesh: ① dense mesh should have four complete certificates and flame retardant performance, and its continuous burning and smoldering time should not be more than 4 seconds. To comply with the provisions of gb16909. ② Every 10 cm × The area of 10cm = 100cm2 has more than 2000 mesh. Dense mesh penetration test: ring the penetration test, the mesh shall be leveled at an angle of 30 degrees between the mesh and the ground. At 3 meters above the center, a 5kg steel pipe (48-51mm in diameter) shall be used to hang over an area of 100cm2, with more than 2000 mesh. Dense mesh mesh penetration test: ring the penetration test, the mesh and the ground shall be leveled at an angle of 30 degrees, and the 5kg steel pipe (pipe diameter 48-51mm) shall be used to fall vertically and freely 3 meters above the center. If it does not penetrate, it is qualified. The binding method of dense mesh wind: use 14 ᦇ lead wire to bind the dense mesh net to the vertical bar or large cross bar, so as to firmly connect the net with the frame. The material of the fly should meet the requirements of gb16909. Enclosed with net: the big eye safety net (flat net) is used to close the scaffold and the building. A flat net is set at the second floor, and every 10 meters is closed
(7) the upper and lower passage of scaffold: the scaffold body should be provided with a safe raceway: ① the width of the raceway should not be less than 1m, and the slope should be 1:3 (height: length). ② The distance between the vertical and horizontal poles of the raceway shall be suitable for the scaffold, the foundation shall be treated according to the requirements of the scaffold, and the facade shall be provided with cross bracing. ③ The distance between small cross bars of pedestrian ramps shall not exceed 1.5m. ④ Scaffold board shall be fully paved on the raceway, and anti-skid strip shall be nailed on the board, and the anti-skid strip shall not be more than 300 mm. ⑤ Guardrail pole is set, the upper guardrail is 1.2m, the lower guardrail is 0.6m away from the scaffold board, and 180mm wide toe board is set at the same time
(8) scaffold unloading platform: the control load shall be marked on the unloading platform; Construction shall be carried out in strict accordance with the erection scheme
Design and calculation of unloading platform
the horizontal distance of vertical pole B = 1m, the vertical distance of vertical pole L = 1.5m, the step distance h = 1.5m
the cross bracing is set continuously, and the width of unloading platform C = 2m
(1) strength calculation
mmax = Q12 / 8
q = 1.2 (GK. C + GH) + 1.4kqqk. C
GK - weight of scaffold board GK = 0.3kn/m2
C - width of unloading platform C = 2m
GK - unit length of steel pipe GK = 38n / M
KQ - construction live load KQ = 1.2n/m2
QK - standard value of construction load QK = 2000N / m2
q = 1.2 * (300 * 1.0 + 38) + 1.4 * 1.2 * 2000 * 1 = 405.6 + 3360 =3765.6n/m
mmax = (3765.6 * 12) / 8 = 470.7n. M
checking bending strength
s = mmax / w = 470.7 / 5078 = 92.7n/mm2 & lt; 205n / mm2
so the safety meets the design requirements
(2) calculated deformation
look up the table φ 48 * 3.5 steel pipe parameters
e = 2.06 * 105N / mm2 (steel pipe elastic molus)
I = 12190mm (steel pipe section moment of inertia) w / b = 5ql3 / 384ei = (5 * 3765.6 * 10003) / (384 * 2.06 * 105) * 12190)
= zero 19%=1/526< 1 / 150 meets the requirements
through structural calculation, it meets the requirements of strength, rigidity and stability
(9) external scaffold erection sequence
the scaffold erection of this project is from bottom to top. After the laying of the base plate of the vertical pole, the ruler is arranged from one side of the building, and the axis line of the vertical pole is drawn with chalk on the base plate, Then place the standard base and the sweeping pole on the base plate - > vertical pole (then the vertical pole and the sweeping pole are fastened with right angle fasteners) - > small sweeping pole installation - > installation of the first step large transverse pole - > installation of the first step small transverse pole - > correction of the vertical pole - > setting of the first row of pull points - > installation of the second step large transverse pole - > second step small transverse pole... And so on, Scissors and transverse support bars shall be installed when erecting a 7-step high cross bar.
(2) after the backfill soil is tamped, a layer of 0.2 mm thick is laid on it × After that, the steel base is placed on the wooden scaffold board, and the vertical pole is placed on the steel base. Then, the setting out and positioning are carried out according to the designed vertical pole spacing. The laying of the wooden scaffold board should be stable and should not be suspended< 3. Technical requirements of scaffold structure
(1) according to the requirements of scaffold structure, the project is a frame structure, which is used with inner and outer double bent. The distance between the inner vertical pole and the wall is 200 mm, the distance between the vertical pole and the cornice is 450 mm, the distance between the outer vertical pole and the wall is 1.2 m, the distance between the row of vertical poles is 1.2 m, the distance between the vertical poles is 1.8 m, the distance between the large horizontal poles is 1.8 m, the distance between the small horizontal poles is 1.5 m, the distance between the vertical poles and the vertical poles is 1.5 m The large cross bar shall be butted with straight fasteners. During the erection process, the neutral bar shall be erected on the outside of the large cross bar, the joints of two adjacent bars shall be staggered by one step and not more than 500mm, and the distance between the center of each joint and the main node shall not be greater than 1 / 3 of the step distance. The erection of vertical pole shall be vertical, and the erection of horizontal pole shall be horizontal. The verticality of vertical pole shall be 1 / 400, and the total height shall not be greater than ± 50mm, the erection of large cross bar shall be horizontal, and the horizontal difference of the whole length shall not be greater than ± 20 mm, the deviation of vertical distance and row distance of vertical pole is not more than 20 mm ± The distance of the small cross bar from the main node should not be more than 150 cm, and the extension length of the side close to the wall should not be more than 500 mm
(2) for the connection between the scaffold and the building, the height of the scaffold is connected with the floor column by short steel pipe on each floor, and the internal and external scaffold and the vertical pole or large cross bar are fastened with fasteners by tie rods. The vertical height of the pull joint is not more than 4 meters, and the layer by layer pull joint and horizontal spacing is not more than 6 meters, and a pull joint is set every other concrete column. When setting, it should be as close as possible to the main joint, and the distance from the main joint should not be more than 30 cm. The layout form is flower row
(3) six meter steel pipe is used to set up the cross bracing. There are seven vertical bars and seven large cross bars as a group of cross bracing. A group of cross bracing is set every six to form a 45 degree angle with the ground. The cross bracing is set on both sides of the corner at both ends of the scaffold. Each group of cross bracing should be set up continuously up and down. Besides the two ends of the diagonal bar are fastened with the vertical bar and large cross bar by rotary fasteners, two fasteners should be added in the middle, The distance between the fastener at both ends of the diagonal bar and the node of the vertical bar shall not be greater than 150 mm, the distance between the connection point of the lowest diagonal bar and the vertical bar shall not be greater than 200 mm, the overlapping length of the scissor strut shall be 1000 mm, and the fastener shall be fastened with three fasteners, and the fastener shall not be less than 10 cm at the end of the steel pipe. The lower end of the scissors must fall to the ground
(4) for the laying of scaffold board, the scaffold of the construction operation layer must be fully, stably and strictly paved, and the distance from the wall shall not be more than 200 mm. A scaffold board shall be laid between the inner vertical pole and the wall, and there shall be no gap and control board. The construction of this project is carried out from top to bottom, and only one operation layer is considered. For the scaffold board laid at the opposite end, two small cross bars must be set under the joint, The end of the board is 150 mm away from the small cross bar, and the scaffold board at the corner must be crossed and laid
(5) for the protection of the operation layer and the passageway, two protective railings shall be set at the height of 1.2m of the operation layer, but the dense mesh vertical net with the permit must be hung. The side rope of the vertical net shall be close to the large cross bar, and the rope shall be tied firmly, and the 180mm high skirting board shall be set instead of the wooden skirting board. A layer of pocket net is set at 3M away from the ground, and a safety passage is set at the south of the building. The opening is 3M long and 3M high, which is the same width as the opening. A layer of 50mm wooden scaffold board is laid on the top, and the signboard is hung
(6) sealing method between scaffold body and building: dense mesh vertical sealing, quality requirements of dense mesh: ① dense mesh should have four complete certificates and flame retardant performance, and its continuous burning and smoldering time should not be more than 4 seconds. To comply with the provisions of gb16909. ② Every 10 cm × The area of 10cm = 100cm2 has more than 2000 mesh. Dense mesh penetration test: ring the penetration test, the mesh shall be leveled at an angle of 30 degrees between the mesh and the ground. At 3 meters above the center, a 5kg steel pipe (48-51mm in diameter) shall be used to hang over an area of 100cm2, with more than 2000 mesh. Dense mesh mesh penetration test: ring the penetration test, the mesh and the ground shall be leveled at an angle of 30 degrees, and the 5kg steel pipe (pipe diameter 48-51mm) shall be used to fall vertically and freely 3 meters above the center. If it does not penetrate, it is qualified. The binding method of dense mesh wind: use 14 ᦇ lead wire to bind the dense mesh net to the vertical bar or large cross bar, so as to firmly connect the net with the frame. The material of the fly should meet the requirements of gb16909. Enclosed with net: the big eye safety net (flat net) is used to close the scaffold and the building. A flat net is set at the second floor, and every 10 meters is closed
(7) the upper and lower passage of scaffold: the scaffold body should be provided with a safe raceway: ① the width of the raceway should not be less than 1m, and the slope should be 1:3 (height: length). ② The distance between the vertical and horizontal poles of the raceway shall be suitable for the scaffold, the foundation shall be treated according to the requirements of the scaffold, and the facade shall be provided with cross bracing. ③ The distance between small cross bars of pedestrian ramps shall not exceed 1.5m. ④ Scaffold board shall be fully paved on the raceway, and anti-skid strip shall be nailed on the board, and the anti-skid strip shall not be more than 300 mm. ⑤ Guardrail pole is set, the upper guardrail is 1.2m, the lower guardrail is 0.6m away from the scaffold board, and 180mm wide toe board is set at the same time
(8) scaffold unloading platform: the control load shall be marked on the unloading platform; Construction shall be carried out in strict accordance with the erection scheme
Design and calculation of unloading platform
the horizontal distance of vertical pole B = 1m, the vertical distance of vertical pole L = 1.5m, the step distance h = 1.5m
the cross bracing is set continuously, and the width of unloading platform C = 2m
(1) strength calculation
mmax = Q12 / 8
q = 1.2 (GK. C + GH) + 1.4kqqk. C
GK - weight of scaffold board GK = 0.3kn/m2
C - width of unloading platform C = 2m
GK - unit length of steel pipe GK = 38n / M
KQ - construction live load KQ = 1.2n/m2
QK - standard value of construction load QK = 2000N / m2
q = 1.2 * (300 * 1.0 + 38) + 1.4 * 1.2 * 2000 * 1 = 405.6 + 3360 =3765.6n/m
mmax = (3765.6 * 12) / 8 = 470.7n. M
checking bending strength
s = mmax / w = 470.7 / 5078 = 92.7n/mm2 & lt; 205n / mm2
so the safety meets the design requirements
(2) calculated deformation
look up the table φ 48 * 3.5 steel pipe parameters
e = 2.06 * 105N / mm2 (steel pipe elastic molus)
I = 12190mm (steel pipe section moment of inertia) w / b = 5ql3 / 384ei = (5 * 3765.6 * 10003) / (384 * 2.06 * 105) * 12190)
= zero 19%=1/526< 1 / 150 meets the requirements
through structural calculation, it meets the requirements of strength, rigidity and stability
(9) external scaffold erection sequence
the scaffold erection of this project is from bottom to top. After the laying of the base plate of the vertical pole, the ruler is arranged from one side of the building, and the axis line of the vertical pole is drawn with chalk on the base plate, Then place the standard base and the sweeping pole on the base plate - > vertical pole (then the vertical pole and the sweeping pole are fastened with right angle fasteners) - > small sweeping pole installation - > installation of the first step large transverse pole - > installation of the first step small transverse pole - > correction of the vertical pole - > setting of the first row of pull points - > installation of the second step large transverse pole - > second step small transverse pole... And so on, Scissors and transverse support bars shall be installed when erecting a 7-step high cross bar.
10. 1. There is a special mole in the PKPM toolbox, which can calculate the design drawing, only need to convert the wind load. Tie bars can also be calculated in the horizontal support mole in the toolbox. Generally, the force of tie bar is small, and it only needs to meet the requirement of slenderness ratio
2. Column bracing is a connecting member set between two adjacent columns to ensure the overall stability of the building structure, improve the lateral stiffness and transfer the longitudinal horizontal force
3. In tied arch bridge, the tie bar bearing horizontal thrust at arch end is called tie bar. According to the comparison between the stiffness of tie bar and arch rib, it can be divided into rigid tie bar and flexible tie bar. The rigid tie is subjected to both tension and pressure, while the flexible tie is only subjected to tension
4. Steel structure is mainly composed of steel materials, which is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates. The components or components are usually connected by welding, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields.
2. Column bracing is a connecting member set between two adjacent columns to ensure the overall stability of the building structure, improve the lateral stiffness and transfer the longitudinal horizontal force
3. In tied arch bridge, the tie bar bearing horizontal thrust at arch end is called tie bar. According to the comparison between the stiffness of tie bar and arch rib, it can be divided into rigid tie bar and flexible tie bar. The rigid tie is subjected to both tension and pressure, while the flexible tie is only subjected to tension
4. Steel structure is mainly composed of steel materials, which is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates. The components or components are usually connected by welding, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields.
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