We present a(t,n)threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubitquantum state between two remote parties.The unknown m-qubit quantum state can be recovered by the receiver underc...We present a(t,n)threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubitquantum state between two remote parties.The unknown m-qubit quantum state can be recovered by the receiver undercontrol of a subset of the n controllers if the number of the subset is larger than or equal to a threshold,say,t,but not forany t —1 or fewer controllers.Our scheme seems to be more practical and more flexible than other existing protocols.Thequantum resource required is just m Einstein-Podolsky-Rosen(EPR)pairs plus some single photons.The techniquesrequired are only Bell state measurement,single-qubit unitary operation and von Neumann measurement.So our schemeis also feasible with present-day technique.展开更多
我们求婚真( k ， m )为经由多粒子的控制远距传物的阀值控制计划纠缠了状态，在到接收装置(鲍勃)的从一个发送者(艾莉斯)的一个量状态的远距传物在 m 监督人的控制下面以便这些监督人的 k ( k m )或更多能帮助跳的地方，恢复转移状态...我们求婚真( k ， m )为经由多粒子的控制远距传物的阀值控制计划纠缠了状态，在到接收装置(鲍勃)的从一个发送者(艾莉斯)的一个量状态的远距传物在 m 监督人的控制下面以便这些监督人的 k ( k m )或更多能帮助跳的地方，恢复转移状态。由建设，我们的量隧道的任何人是任何二部分是无法分开的一个真多国参加的纠缠的状态。他们的性质著名 GHZ， W，和线性簇状态与那些被作比较并且形成对照，并且也，几个另外的真多国参加的纠缠的状态最近在文学介绍了。展开更多
In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by...In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by a software with data from a sugar cane planting experimental field in Yunnan, China. The methodology behind the detailed system analysis, design, and engineering has been discussed. The issue of how to create a dynamic data-dependent forecast model of a threshold forecast system, whose threshold changes according to the change of planting environment has been solved. Hence an effective solution has been initiated for further development on an agricultural expert system.展开更多
Purpose: To test the concept of Statistical Process Control (SPC) as a Quality Assurance (QA) procedure for dose verifications in external beam radiation therapy in conventional and 3D Conformal Radiotherapy (3D-CRT) ...Purpose: To test the concept of Statistical Process Control (SPC) as a Quality Assurance (QA) procedure for dose verifications in external beam radiation therapy in conventional and 3D Conformal Radiotherapy (3D-CRT) treatment of cervical cancer. Materials and Methods: A study of QA verification of target doses of 198 cervical cancer patients undergoing External Beam Radiotherapy (EBRT) treatments at two different cancer treatment centers in Kenya was conducted. The target doses were determined from measured entrance doses by the diode in vivo dosimetry. Process Behavior Charts (PBC) developed by SPC were applied for setting Action Thresholds (AT) on the target doses. The AT set was then proposed as QA limits for acceptance or rejection of verified target doses overtime of the EBRT process. Result and Discussion: Target doses for the 198 patients were calculated and SPC applied to test whether the action limits set by the Process Behavior Charts could be applied as QA for verified doses in EBRT. Results for the two sub-groups of n = 3 and n = 4 that were tested produced action thresholds which are within clinical dose specifications for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. Conclusion: Action thresholds set by SPC were within the clinical dose specification of ±5% uncertainty for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. So the concept of SPC could be applied in setting QA action limits for dose verifications in EBRT.展开更多
基金Supported by the National Basic Research Program of China (973 Program) under Grant No.2007CB311100the National Natural Science Foundation of China under Grant No.60873191+3 种基金the National High Technology Research and Development Program of China under Grant No.2006AA01Z419the Major Research plan of the National Natural Science Foundation of China under Grant No.90604023the Scientific Research Common Program of Beijing Municipal Commission of Education under Grant No.KM200810005004the Scientific Research Foundation for the Youth of Beijing University of Technology under Grant No.97007016200701
文摘We present a(t,n)threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubitquantum state between two remote parties.The unknown m-qubit quantum state can be recovered by the receiver undercontrol of a subset of the n controllers if the number of the subset is larger than or equal to a threshold,say,t,but not forany t —1 or fewer controllers.Our scheme seems to be more practical and more flexible than other existing protocols.Thequantum resource required is just m Einstein-Podolsky-Rosen(EPR)pairs plus some single photons.The techniquesrequired are only Bell state measurement,single-qubit unitary operation and von Neumann measurement.So our schemeis also feasible with present-day technique.
基金Supported by National Natural Science Foundation of China under Grant Nos.11004050 and 10874019Key Project of Chinese Ministry of Education under Grant No.211119+2 种基金Scientific Research Fund of Hunan Provincial Education Department of China under Grant Nos.10B013 and 09A013Excellent Talents Program of Hengyang Normal University of China under Grant No.2010YCJH01Science Foundation of Hengyang Normal University of China under Grant No.10B69
文摘我们求婚真( k ， m )为经由多粒子的控制远距传物的阀值控制计划纠缠了状态，在到接收装置(鲍勃)的从一个发送者(艾莉斯)的一个量状态的远距传物在 m 监督人的控制下面以便这些监督人的 k ( k m )或更多能帮助跳的地方，恢复转移状态。由建设，我们的量隧道的任何人是任何二部分是无法分开的一个真多国参加的纠缠的状态。他们的性质著名 GHZ， W，和线性簇状态与那些被作比较并且形成对照，并且也，几个另外的真多国参加的纠缠的状态最近在文学介绍了。
文摘In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by a software with data from a sugar cane planting experimental field in Yunnan, China. The methodology behind the detailed system analysis, design, and engineering has been discussed. The issue of how to create a dynamic data-dependent forecast model of a threshold forecast system, whose threshold changes according to the change of planting environment has been solved. Hence an effective solution has been initiated for further development on an agricultural expert system.
文摘Purpose: To test the concept of Statistical Process Control (SPC) as a Quality Assurance (QA) procedure for dose verifications in external beam radiation therapy in conventional and 3D Conformal Radiotherapy (3D-CRT) treatment of cervical cancer. Materials and Methods: A study of QA verification of target doses of 198 cervical cancer patients undergoing External Beam Radiotherapy (EBRT) treatments at two different cancer treatment centers in Kenya was conducted. The target doses were determined from measured entrance doses by the diode in vivo dosimetry. Process Behavior Charts (PBC) developed by SPC were applied for setting Action Thresholds (AT) on the target doses. The AT set was then proposed as QA limits for acceptance or rejection of verified target doses overtime of the EBRT process. Result and Discussion: Target doses for the 198 patients were calculated and SPC applied to test whether the action limits set by the Process Behavior Charts could be applied as QA for verified doses in EBRT. Results for the two sub-groups of n = 3 and n = 4 that were tested produced action thresholds which are within clinical dose specifications for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. Conclusion: Action thresholds set by SPC were within the clinical dose specification of ±5% uncertainty for both conventional AP/PA and 3D-CRT EBRT treatment techniques for cervical cancer. So the concept of SPC could be applied in setting QA action limits for dose verifications in EBRT.
