CN205484054U - Detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not - Google Patents
Detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not Download PDFInfo
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- CN205484054U CN205484054U CN201620109720.6U CN201620109720U CN205484054U CN 205484054 U CN205484054 U CN 205484054U CN 201620109720 U CN201620109720 U CN 201620109720U CN 205484054 U CN205484054 U CN 205484054U
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Abstract
The utility model discloses a detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not, including dissolved oxygen shimmer utmost point host computer, several test probe and detection box, it can place on the muddy water interface to detect the box, the fill water cavity who link up about seting up on the detection box, it is provided with the several respectively to detecting the preceding slot and back slot that the interior level of box is extended to detect box leading flank and trailing flank, detection device still includes the inserted sheet, be provided with the probe groove on the inserted sheet, it is fixed that every test probe can put into the probe groove of corresponding inserted sheet, slot or back were in the slot and make test probe's probe arrange fill water cavity in before the inserted sheet can insert, detection device ability simultaneous measurement muddy water interface is co -altitude and horizontal position dissolved oxygen not, the use is rapid and convenient.
Description
Technical field
This utility model relates to the technical field of dissolved oxygen amount detection equipment, particularly relates to the detection device of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously.
Background technology
Dissolved oxygen low-light pole is to realize the one-dimensional microprobe technology that water sludge interface point oxyty measures.It it is optical fiber information switching sensors based on Fluorescence Quenching Principle, owing to oxygen is the natural quencher of some fluorescence indicator, oxygen sensitive fluorescent indicator is made the oxygen sensing film and is coupled in optical fiber end by it, using high brightness LED is light source and micro photoelectric diode detecting system, determining oxygen concentration by fiber optic conduction fluorescent quenching intensity, ruthenium complex is because of insensitive, not by H to stirring2S、CO2And the characteristic such as salinity interference is the oxygen sensitive fluorescent indicator being most widely used up to now.
The existing assay method for water sludge interface dissolved oxygen is, the water sludge interface sample in waters to be measured is sampled to detection container, then dissolved oxygen low-light pole probe is fixed on upper vessel portion, and the fluorescent probe controlled on probe extends downwardly from, and probe extends in water sludge interface always and is measured.
This method has the disadvantage that:
1, cannot realize in-site detecting, need to gather water sludge interface sample in detection container, the natural environment that this process is easily caused near water sludge interface changes, and causes being adopted the dissolved oxygen situation of water sludge interface and practical situation and does not corresponds；
2, the dissolved oxygen situation of a certain height in a certain position of probe in detecting water sludge interface, a dissolved oxygen low-light pole can only once be controlled, dissolved oxygen situation, the dissolved oxygen situation of these other positions of height of water sludge interface for other height of this position of water sludge interface can only be drawn by repetitive measurement, but repetitive measurement can have bigger span in time, it is impossible to reflects its truth；
3, the probe distance highly desirable mechanical manipulation of water sludge interface and fragile, operation takes time and effort, and detects very inconvenient.
Utility model content
Technical problem to be solved in the utility model is for the above-mentioned state of the art, and provides the detection device of a kind of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously.
nullThe detection device of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously，Including dissolved oxygen low-light pole main frame，Dissolved oxygen low-light pole main frame connects several detection probe，Detection probe can stretch out the probe for measuring dissolved oxygen，It is characterized in that: detection device also includes a detection box，Detection box can be placed on water sludge interface，The water flowing chamber of up/down perforation is offered on detection box、Detection box leading flank and trailing flank are respectively arranged with several horizontal-extending front slot and rear slot in detection box，Front slot and the quantity of rear slot and height are the most corresponding，Front slot all connects with water flowing chamber with rear slot，Detection device also includes inserted sheet，Probe grooves it is provided with on inserted sheet，The profile of probe grooves adapts with the profile of detection probe，Each detection probe can be put in the probe grooves of corresponding inserted sheet fixing，Inserted sheet can insert in front slot or rear slot and make the probe of detection probe be placed in water flowing chamber，When two inserted sheets insert in the front slot of sustained height and rear slot respectively，Detection device can detect water sludge interface sustained height varying level position dissolved oxygen，When two inserted sheets insert differing heights front slot or after slot，And insertion depth identical time，Survey device and can detect dissolved oxygen at the differing heights of water sludge interface same level position.
For optimizing technique scheme, the concrete measure taked also includes:
Being provided with fixing convex in above-mentioned front slot and rear slot, tab edge is provided with slip teeth, when inserted sheet inserts in front slot or rear slot, by selecting different slip teeth to close with fixing convex clip, regulates inserted sheet and inserts the degree of depth of slot.
Being carved with scale on above-mentioned inserted sheet, inserted sheet inserts the degree of depth of slot and can read from scale.
Above-mentioned detection probe includes soft quality optical fiber and rigid optical fiber, rigid optical fiber i.e. probe, and the rear end of rigid optical fiber is connected with dissolved oxygen low-light pole main frame by soft quality optical fiber.
Above-mentioned detection probe also includes that probe pushes structure, probe pushes structure and includes pushing pipe, push post, brake pad, sealing ring, push handle and pipe back seat, push handle to be connected to push post rear end, push post front end and stretch into the fixing connection of brake pad pushed in Guan Zhongyu propelling movement pipe, brake pad and the inwall frictional fit pushing pipe, the closure of pipe back seat pushes pipe rear end, brake pad is fixing with the rear portion of probe to be connected, sealing ring is fixed in propelling movement pipe, it is ante-chamber and back cavity by propelling movement tube chamber sealed separation, ante-chamber is provided with logical window, water can enter ante-chamber from logical window, correspondingly, probe grooves and logical window corresponding position are provided with groove window, when the inserted sheet of fixed test probe is positioned in water flowing chamber, logical window connects with water flowing chamber through groove window；When advancing the external force pushing handle to be more than brake pad with the frictional force pushing pipe, brake pad slip in pushing pipe, make probe extend out in ante-chamber.
Above-mentioned soft quality optical fiber is fixing with propelling movement handle to be connected.
The detection method of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, comprises the following steps:
Step a, assembling detection device: select several detection probe, each detection probe to be respectively clamped in the probe grooves of corresponding inserted sheet as required, it is ensured that detection probe realizes location with inserted sheet,
Step b, detection water sludge interface sustained height varying level position dissolved oxygen: select a pair front slot on sustained height and rear slot, inserted sheet inserts front slot and rear slot respectively, be all pushed out to push the ante-chamber of pipe by the probe of each detection probe；By in detection box sinking to water sludge interface, water injects water flowing chamber and pushes the ante-chamber of pipe, the dissolved oxygen data in each probe collection water；
Dissolved oxygen at step c, detection water sludge interface same level position differing heights: select several front slot being positioned on differing heights and/or rear slot, respectively inserted sheet is inserted in the slot chosen, regulation inserted sheet inserts the degree of depth of slot, the probe of each detection probe is all pushed out to push the ante-chamber of pipe again, each probe is made to be positioned on the differing heights of same level position, by in detection box sinking to water sludge interface, water injects water flowing chamber and pushes the ante-chamber of pipe, the dissolved oxygen data in each probe collection water；
Step d, simultaneously measurement water sludge interface differing heights and varying level position dissolved oxygen: carry out step b and step c simultaneously；
Step e: in step b, step c and step d, the dissolved oxygen data of each probe collection are transmitted to dissolved oxygen low-light pole main frame, after data are analyzed processing by dissolved oxygen low-light pole main frame, display.
Step f: after having detected, proposes detection box from water body, takes out inserted sheet；The method taking out inserted sheet is: pulls back propelling movement handle, makes brake pad slide backward, when brake pad slides to push pipe rear end, probe is retracted in the back cavity of propelling movement pipe, continuing to pull back propelling movement handle, brake pad props up after pipe back seat makes whole inserted sheet and moves, and inserted sheet is drawn out of.
Compared with prior art, detection device of the present utility model and detection method thereof have the advantage that
1, when measuring water sludge interface diverse location differing heights dissolved oxygen, this utility model need not gather water sludge interface sample to detecting in container, but directly detection box is sunk in the water body at tested water sludge interface place, avoid the natural environment near water sludge interface to change, fully achieve in-site detecting.
2, detection probe is fixed on inserted sheet reinstall detection box in, it is to avoid outside detection probe is exposed to, detection probe can be protected well, prevent accidental injury；
3, this utility model has multiple detection probe, these detection probe work simultaneously, thus reach multiple probe and detect same place water sludge interface differing heights, the effect of varying level position dissolved oxygen simultaneously, avoid and testing experiment is repeated several times, both saved the time, the true distribution of water sludge interface differing heights, varying level position dissolved oxygen amount sometime can be obtained again.
4, the dissolved oxygen detection of water sludge interface differing heights, varying level position is once completed, very easy to use.
Accompanying drawing explanation
Fig. 1 is the front schematic view of detection box；
Fig. 2 is the reverse side schematic diagram of detection box；
Fig. 3 is the top view of detection box；
Fig. 4 is the M-M sectional view of Fig. 1；
Fig. 5 is the structural representation of detection probe；
Fig. 6 is the structural representation of inserted sheet；
Fig. 7 is the schematic diagram that detection probe is put in inserted sheet；
Fig. 8 is the schematic diagram after probe stretches out；
Fig. 9 is the schematic diagram of detection water sludge interface sustained height varying level position dissolved oxygen；
Figure 10 is the schematic diagram of dissolved oxygen at the differing heights of detection water sludge interface same level position；
Figure 11 is to measure water sludge interface differing heights and the schematic diagram of varying level position dissolved oxygen simultaneously；
Figure 12 is the A portion schematic enlarged-scale view of Figure 11；
Figure 13 is dissolved oxygen low-light electrode structure schematic block diagram.
Reference therein is: dissolved oxygen low-light pole main frame 1, detection probe 2, probe 21, detection box 3, water flowing chamber 31, front slot 32, rear slot 33, fixing convex 34, inserted sheet 4, probe grooves 41, groove window 41a, slip teeth 42, scale 43, probe push structure 5, push pipe 51, ante-chamber 51a, back cavity 51b, push post 52, brake pad 53, sealing ring 54, push handle 55, pipe back seat 56, logical window 57.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
nullAs shown in figure 1 to figure 13，The detection device of energy of the present utility model in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously，Including dissolved oxygen low-light pole main frame 1，Dissolved oxygen low-light pole main frame 1 connects several detection probe 2，Detection probe 2 can stretch out the probe 21 for measuring dissolved oxygen，It is characterized in that: detection device also includes a detection box 3，Detection box 3 can be placed on water sludge interface，The water flowing chamber 31 of up/down perforation is offered on detection box 3、Detection box 3 leading flank and trailing flank are respectively arranged with several horizontal-extending front slot 32 and rear slot 33 in detection box 3，Front slot 32 and the quantity of rear slot 33 and height are the most corresponding，Front slot 32 all connects with water flowing chamber 31 with rear slot 33，Detection device also includes inserted sheet 4，Probe grooves 41 it is provided with on inserted sheet 4，The profile of probe grooves 41 adapts with the profile of detection probe 2，Each detection probe 2 can be put in the probe grooves 41 of corresponding inserted sheet 4 fixing，Inserted sheet 4 can insert in front slot 32 or rear slot 33 and make the probe 21 of detection probe 2 be placed in water flowing chamber 31，When two inserted sheets 4 insert in the front slot 32 of sustained height and rear slot 33 respectively，Detection device can detect water sludge interface sustained height varying level position dissolved oxygen，When two inserted sheets 4 insert differing heights front slot 32 or after slot 33，And insertion depth identical time，Survey device and can detect dissolved oxygen at the differing heights of water sludge interface same level position.
In embodiment, being provided with fixing convex 34 in front slot 32 and rear slot 33, inserted sheet 4 edge is provided with slip teeth 42, and when inserted sheet 4 inserts in front slot 32 or rear slot 33, by selecting different slip teeth 42 to engage with fixing convex 34, regulation inserted sheet 4 inserts the degree of depth of slot.
In embodiment, inserted sheet 4 being carved with scale 43, inserted sheet 4 inserts the degree of depth of slot and can read from scale 43.
In embodiment, detection probe 2 includes soft quality optical fiber 22 and rigid optical fiber, rigid optical fiber i.e. probe 21, and the rear end of rigid optical fiber is connected with dissolved oxygen low-light pole main frame 1 by soft quality optical fiber 22.
nullIn embodiment，Detection probe 2 also includes that probe pushes structure 5，Probe pushes structure 5 and includes pushing pipe 51、Push post 52、Brake pad 53、Sealing ring 54、Push handle 55 and pipe back seat 56，Push handle 55 to be connected to push post 52 rear end，Push post 52 front end and stretch into fixing with the brake pad 53 pushed in pipe 51 in propelling movement pipe 51 connection，Brake pad 53 and the inwall frictional fit pushing pipe 51，Pipe back seat 56 closure pushes pipe 51 rear end，Brake pad 53 is fixing with the rear portion of probe 21 to be connected，Sealing ring 54 is fixed in propelling movement pipe 51，It is ante-chamber 51a and back cavity 51b by propelling movement pipe 51 cavity sealed separation，Ante-chamber 51a is provided with logical window 57，Water can enter ante-chamber 51a from logical window 57，Correspondingly，Probe grooves 41 and logical window 57 corresponding position are provided with groove window 41a，When the inserted sheet 4 of fixed test probe 2 is positioned in water flowing chamber 31，Logical window 57 connects with water flowing chamber 31 through groove window 41a；When advancing the external force pushing handle 55 to be more than brake pad 53 with the frictional force pushing pipe 51, brake pad 53 slides in pushing pipe 51, makes probe 21 extend out in ante-chamber 51a.
In embodiment, soft quality optical fiber 22 is fixing with propelling movement handle 55 to be connected.
The detection method of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, comprises the following steps:
Step a, assembling detection device: select several detection probe 2, each detection probe 2 to be respectively clamped in the probe grooves 41 of corresponding inserted sheet 4 as required, it is ensured that detection probe 2 realizes location with inserted sheet 4,
Step b, detection water sludge interface sustained height varying level position dissolved oxygen: select a pair front slot 32 on sustained height and rear slot 33, respectively inserted sheet 4 is inserted front slot 32 and rear slot 33, the probe 21 of each detection probe 2 is all pushed out to push the ante-chamber 51a of pipe 51；By in detection box 3 sinking to water sludge interface, water injects water flowing chamber 31 and pushes the ante-chamber 51a of pipe 51, and each probe 21 gathers the dissolved oxygen data in water；As shown in Figure 9.
Dissolved oxygen at step c, detection water sludge interface same level position differing heights: select several front slot 32 being positioned on differing heights and/or rear slot 33, respectively inserted sheet 4 is inserted in the slot chosen, regulation inserted sheet 4 inserts the degree of depth of slot, the probe 21 of each detection probe 2 is all pushed out to push the ante-chamber 51a of pipe 51 again, each probe 21 is made to be positioned on the differing heights of same level position, box 3 sinking will be detected to water sludge interface, water injects water flowing chamber 31 and pushes the ante-chamber 51a of pipe 51, and each probe 21 gathers the dissolved oxygen data in water；As shown in Figure 10.
Step d, simultaneously measurement water sludge interface differing heights and varying level position dissolved oxygen: carry out step b and step c simultaneously；As is illustrated by figs. 11 and 12.
Step e: the dissolved oxygen data transmission that in step b, step c and step d, each probe 21 gathers to dissolved oxygen low-light pole main frame 1, after data are analyzed processing by dissolved oxygen low-light pole main frame 1, display.
Step f: after having detected, proposes detection box 3 from water body, takes out inserted sheet 4；The method taking out inserted sheet 4 is: pull back propelling movement handle 55, brake pad 53 is made to slide backward, when brake pad 53 slides to push pipe 51 rear end, probe 21 is retracted in the back cavity 51b of propelling movement pipe 51, continue to pull back propelling movement handle 55, brake pad 53 props up after pipe back seat 56 makes whole inserted sheet 4 and moves, and inserted sheet 4 is drawn out of.
Detection box 3 of the present utility model is the thinnest, and height is less than 1cm, and the thickness of inserted sheet 4 is about 1mm.
The detection probe 2 that the present embodiment uses is fluorescent probe, the principle of its detection water sludge interface dissolved oxygen is: utilize dissolved oxygen low-light pole main frame 1 to send laser, laser is incident upon at probe 21 by soft quality optical fiber 22, probe 21 front end arranges oxygen-sensitive fluorescent material, laser is mapped on oxygen-sensitive fluorescent material, the fluorescence produced by Fluorescence quenching effect feeds back to dissolved oxygen low-light pole main frame 1, fluorescence signal is converted into the signal of telecommunication by dissolved oxygen low-light pole main frame 1, and by the signal of telecommunication demodulate after with dissolved oxygen concentration variation relation comparison, draw dissolved oxygen concentration information.Oxygen-sensitive fluorescent material can select from existing various sensitive fluorescent materials, and preferable material is ruthenium complex, such as Ru (dpp)3Cl2Deng.
Below being only preferred implementation of the present utility model, protection domain of the present utility model is not limited merely to above-described embodiment, and all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.It should be pointed out that, for those skilled in the art, without departing from the some improvements and modifications under this utility model principle premise, should be regarded as protection domain of the present utility model.
Claims (6)
- null1. the detection device of energy in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously，Including dissolved oxygen low-light pole main frame (1)，Described dissolved oxygen low-light pole main frame (1) connects several detection probe (2)，Described detection probe (2) can stretch out the probe (21) for measuring dissolved oxygen，It is characterized in that: detection device also includes a detection box (3)，Described detection box (3) can be placed on water sludge interface，The water flowing chamber (31) of up/down perforation is offered on described detection box (3)、Detection box (3) leading flank and trailing flank are respectively arranged with several horizontal-extending front slot (32) and rear slot (33) in detection box (3)，Described front slot (32) and the quantity of rear slot (33) and height are the most corresponding，Described front slot (32) all connects with water flowing chamber (31) with rear slot (33)，Detection device also includes inserted sheet (4)，It is provided with probe grooves (41) on described inserted sheet (4)，The profile of described probe grooves (41) adapts with the profile of detection probe (2)，Each described detection probe (2) can be put in the probe grooves (41) of corresponding inserted sheet (4) fixing，Described inserted sheet (4) can insert in front slot (32) or rear slot (33) and make the probe (21) of detection probe (2) be placed in water flowing chamber (31)，When two inserted sheets (4) insert in the front slot (32) of sustained height and rear slot (33) respectively，Detection device can detect water sludge interface sustained height varying level position dissolved oxygen，When two inserted sheets (4) insert differing heights front slot (32) or after slot (33)，And insertion depth identical time，Survey device and can detect dissolved oxygen at the differing heights of water sludge interface same level position.
- The detection device of energy the most according to claim 1 in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, it is characterized in that: described front slot (32) and rear slot (33) are provided with fixing convex (34), described inserted sheet (4) edge is provided with slip teeth (42), when inserted sheet (4) inserts in front slot (32) or rear slot (33), by selecting different slip teeth (42) to engage with fixing convex (34), the degree of depth of slot is inserted in regulation inserted sheet (4).
- The detection device of energy the most according to claim 1 in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, it is characterized in that: be carved with scale (43) on described inserted sheet (4), inserted sheet (4) inserts the degree of depth of slot and can read from scale (43).
- The detection device of energy the most according to claim 1 in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, it is characterized in that: described detection probe (2) includes soft quality optical fiber (22) and rigid optical fiber, described rigid optical fiber i.e. probe (21), the rear end of described rigid optical fiber is connected with dissolved oxygen low-light pole main frame (1) by soft quality optical fiber (22).
- nullThe detection device of energy the most according to claim 4 in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously，It is characterized in that: described detection probe (2) also includes that probe pushes structure (5)，Described probe pushes structure (5) and includes pushing pipe (51)、Push post (52)、Brake pad (53)、Sealing ring (54)、Push handle (55) and pipe back seat (56)，Described propelling movement handle (55) is connected to push post (52) rear end，Described propelling movement post (52) front end is stretched into and is pushed fixing with the brake pad (53) pushed in pipe (51) in pipe (51) connection，Described brake pad (53) and the inwall frictional fit pushing pipe (51)，Described pipe back seat (56) closure pushes pipe (51) rear end，Described brake pad (53) is fixing with the rear portion of probe (21) to be connected，Described sealing ring (54) is fixed in propelling movement pipe (51)，It is ante-chamber (51a) and back cavity (51b) by propelling movement pipe (51) cavity sealed separation，Described ante-chamber (51a) is provided with logical window (57)，Water can enter ante-chamber (51a) from logical window (57)，Correspondingly，Described probe grooves (41) and logical window (57) corresponding position are provided with groove window (41a)，When the inserted sheet (4) of fixed test probe (2) is positioned in water flowing chamber (31)，Logical window (57) connects with water flowing chamber (31) through groove window (41a)；When advancing the external force pushing handle (55) to be more than brake pad (53) with the frictional force pushing pipe (51), described brake pad (53) slides in pushing pipe (51), makes probe (21) extend out in ante-chamber (51a).
- The detection device of energy the most according to claim 5 in site measurement water sludge interface varying level position differing heights dissolved oxygen simultaneously, is characterized in that: described soft quality optical fiber (22) is fixing with propelling movement handle (55) to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620109720.6U CN205484054U (en) | 2016-02-03 | 2016-02-03 | Detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620109720.6U CN205484054U (en) | 2016-02-03 | 2016-02-03 | Detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not |
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| CN205484054U true CN205484054U (en) | 2016-08-17 |
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| CN201620109720.6U Expired - Fee Related CN205484054U (en) | 2016-02-03 | 2016-02-03 | Detection apparatus for different horizontal position in muddy water of in site measurement simultaneously interface are co -altitude dissolved oxygen not |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572094A (en) * | 2016-02-03 | 2016-05-11 | 环境保护部南京环境科学研究所 | Detection device and detection method capable of measuring dissolved oxygen at different horizontal positions and different heights of mud-water interface simultaneously in situ |
-
2016
- 2016-02-03 CN CN201620109720.6U patent/CN205484054U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572094A (en) * | 2016-02-03 | 2016-05-11 | 环境保护部南京环境科学研究所 | Detection device and detection method capable of measuring dissolved oxygen at different horizontal positions and different heights of mud-water interface simultaneously in situ |
| CN105572094B (en) * | 2016-02-03 | 2019-07-26 | 环境保护部南京环境科学研究所 | The detection device and its detection method of energy while in situ measurement water sludge interface different level position different height dissolved oxygen |
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Effective date of registration: 20160926 Address after: Xuanwu District of Nanjing City, Jiangsu province 210042 Jiang Wang Temple Street No. 8 Patentee after: Ministry of Environmental Protection, Nanjing Environment Science Institute Patentee after: Collaborative innovation center of air environment and equipment technology in Jiangsu Address before: Xuanwu District of Nanjing City, Jiangsu province 210042 Jiang Wang Temple Street No. 8 Patentee before: Ministry of Environmental Protection, Nanjing Environment Science Institute |
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Granted publication date: 20160817 Termination date: 20170203 |