We propose genuine （k, m）-threshold controlling schemes for controlled teleportation via multi-particle entangled states, where the teleportation of a quantum state from a sender （Alice） to a receiver （Bob） is u...We propose genuine （k, m）-threshold controlling schemes for controlled teleportation via multi-particle entangled states, where the teleportation of a quantum state from a sender （Alice） to a receiver （Bob） is under the control of m supervisors such that k （k≤ m） or more of these supervisors can help Bob recover the transferred state. By construction, anyone of our quantum channels is a genuine multipartite entangled state of which any two parts are inseparable. Their properties are compared and contrasted with those of the well-known GHZ, W, and linear cluster states, and also several other genuine multipartite entangled states recently introduced in the literature.展开更多
We present a （t, .n） threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receive...We present a （t, .n） threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control 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 for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen （EPR） pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.展开更多
Since Tian Jun proposed the difference expansion embedding technique,based on which,many reversible watermarking techniques were proposed.However,these methods do not perform well when the payload is high.In this pape...Since Tian Jun proposed the difference expansion embedding technique,based on which,many reversible watermarking techniques were proposed.However,these methods do not perform well when the payload is high.In this paper,we proposed an expandable difference threshold controlled scheme for these three methods.Experiments show that our scheme improves the performance of these three methods for heavy payload.展开更多
With the simultaneous rise of energy costs and demand for cloud computing, efficient control of data centers becomes crucial. In the data center control problem, one needs to plan at every time step how many servers t...With the simultaneous rise of energy costs and demand for cloud computing, efficient control of data centers becomes crucial. In the data center control problem, one needs to plan at every time step how many servers to switch on or off in order to meet stochastic job arrivals while trying to minimize electricity consumption. This problem becomes particularly challenging when servers can be of various types and jobs from different classes can only be served by certain types of server, as it is often the case in real data centers. We model this problem as a robust Markov decision process(i.e., the transition function is not assumed to be known precisely). We give sufficient conditions(which seem to be reasonable and satisfied in practice) guaranteeing that an optimal threshold policy exists. This property can then be exploited in the design of an efficient solving method, which we provide.Finally, we present some experimental results demonstrating the practicability of our approach and compare with a previous related approach based on model predictive control.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
目的建立测定艾司唑仑原料中基因毒性杂质甲醛的柱前衍生高效液相色谱方法,考察国内4家企业艾司唑仑原料中甲醛含量水平。方法色谱柱为CAPCELL PAK C8柱,流动相为水-乙腈(60:40),流速为1.0 mL/min,检测波长为360 nm,柱温为30℃,进样量...目的建立测定艾司唑仑原料中基因毒性杂质甲醛的柱前衍生高效液相色谱方法,考察国内4家企业艾司唑仑原料中甲醛含量水平。方法色谱柱为CAPCELL PAK C8柱,流动相为水-乙腈(60:40),流速为1.0 mL/min,检测波长为360 nm,柱温为30℃,进样量为10μL。结果甲醛2,4-二硝基苯腙在浓度0.05~1μg/mL范围内与峰面积线性关系良好(r=0.9998);检测限和定量限分别为6和20μg/g;进样精密度和重复性试验的RSD分别为0.2%和1.4%(n=6);平均加样回收率为101.8%,RSD为0.8%(n=6)。1家企业的2批原料中甲醛含量远超过控制阈值,另外5批原料中甲醛含量均小于定量限。结论建立的甲醛测定方法准确度高,灵敏度强。建议甲醛含量超过控制阈值的生产企业制定合理的控制策略。展开更多
The idea of this work arises from the analysis of the researches developed in the literature on topic of ownership and control that are mostly based on threshold of ownership stake to determine control equal for all c...The idea of this work arises from the analysis of the researches developed in the literature on topic of ownership and control that are mostly based on threshold of ownership stake to determine control equal for all companies and, in most cases, not supported by theoretical arguments and empirical evidences. In fact, the aim of this paper is to build a new method of determining the threshold of ownership stake that allows the shareholder to exercise control. In particular, this survey uses all Italian listed companies as reference, and the minutes of the Ordinary and Extraordinary General Meetings of shareholders, in 2009-2012, as database. The topic can be enriched with further and future researches aiming to adapt this new method in a cross-country investigation and so to identify the different threshold for the countries, on the basis of the different national laws regarding the ownership stakes that affect the control.展开更多
Objective: to explore the risk factors of diabetic nephropathy caused by diabetic patients and the critical value of blood pressure that patients need to control. Methods: 74 patients with diabetic nephropathy who rec...Objective: to explore the risk factors of diabetic nephropathy caused by diabetic patients and the critical value of blood pressure that patients need to control. Methods: 74 patients with diabetic nephropathy who received treatment in our hospital from March 2019 to March 2020 were selected. After the patients were admitted to our hospital, the medical staff first thoroughly understood the patient's physical condition. The 74 patients were divided into group F as a reference and group Y for observation according to the patient's condition. The patients in group F were determined to have the disease as non-diabetic nephropathy according to the clinical detection standard. Group Y patients were identified as diabetic nephropathy patients according to the clinical diagnostic criteria. The clinical data of the patients were analyzed in detail. The patient's age, onset course and related indicators were recorded and compared. The risk factors of diabetic nephropathy were determined based on regression analysis. The protective factor is high density lipoprotein, and other factors are irrelevant. The critical blood pressure values of the patients were 137.6mmhg and 78.01mmhg respectively. Conclusion: the analysis of the risk factors of diabetic nephropathy. The risk factors of diabetic nephropathy should be controlled scientifically and the critical value of blood pressure should be strictly controlled to delay the development of the patient's condition.展开更多
随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模...随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模式下的控制性能评价标准(control performance standard,CPS)标准,通过频率偏差系数来确定各控制区的考核阈值,却未考虑各控制区客观电源结构的影响,在高比例新能源电力系统中的不适应性日益凸显。首先分析了现有CPS标准的前提条件与内涵,揭示了CPS标准在高比例新能源电力系统中的不适应性,进而提出了控制区固有区域控制偏差(area control area,ACE)标准差的概念,利用固有ACE标准差确定考核阈值,提出了CPS标准的改进方法,并与原有CPS标准进行了对比。最后通过算例分析,验证了所提出改进标准比原有CPS标准更加公平合理。展开更多
To carry out the deep space exploration tasks near Sun-Earth Libration point L2, the CRTBP dynamic model was built up and the numerical conditional quasi-periodic orbit （Lissajons orbit） was computed near L2. Then, ...To carry out the deep space exploration tasks near Sun-Earth Libration point L2, the CRTBP dynamic model was built up and the numerical conditional quasi-periodic orbit （Lissajons orbit） was computed near L2. Then, a formation controller was designed with linear matrix inequality to overcome the difficuhy of parameter tuning. To meet the demands of formation accuracy and present thruster＇s capability, a threshold scheme was adopted for formation control. Finally, some numerical simulations and analysis were completed to demonstrate the feasibility of the proposed control strategy.展开更多
In this paper, by using properties of quantum controlled-not manipulation and entanglement states, we have designed a novel （2, 3） quantum threshold scheme based on the Greenberger- Horne -Zeilinger （GHZ） state. T...In this paper, by using properties of quantum controlled-not manipulation and entanglement states, we have designed a novel （2, 3） quantum threshold scheme based on the Greenberger- Horne -Zeilinger （GHZ） state. The proposed scheme involves two phases, i.e. a secret sharing phase and a secret phase. Detailed proofs show that the proposed scheme is of unconditional security. Since the secret is shared among three participants, the proposed scheme may be applied to quantum key distribution and secret sharing.展开更多
Hydrocarbon source rock obviously controls the formation and distribution of hydrocarbon reservoirs. Based on the geological concept of ＂source control theory＂, the concept of a hydrocarbon distribution threshold wa...Hydrocarbon source rock obviously controls the formation and distribution of hydrocarbon reservoirs. Based on the geological concept of ＂source control theory＂, the concept of a hydrocarbon distribution threshold was put forward. This means the maximum range for hydrocarbon controlled by the source rock conditions to migrate in the hydrocarbon basins. Three quantitative analysis models are proposed on this basis, namely the hydrocarbon accumulation probability, maximum hydrocarbon scale threshold and reserve distribution probability, which respectively refer to the probability of forming a hydrocarbon reservoir, the possible maximum scale of the hydrocarbon reservoir and the percentage of reserve distribution in a certain area within the hydrocarbon distribution threshold. Statistical analysis on 539 hydrocarbon reservoirs discovered in 28 hydrocarbon source kitchens from seven sedimentary basins and sags of eastern China shows the maximum reservoir scale possibly formed in the hydrocarbon basin, hydrocarbon accumulation probability and oil and gas reserve distribution probability are all controlled by the characteristics of the hydrocarbon source rock. Generally, as the distances from the hydrocarbon source rock center and hydrocarbon discharge boundary get longer and the hydrocarbon discharge intensity of hydrocarbon source rock center gets smaller, there will be lower probability of hydrocarbon accumulation. Corresponding quantitative models are established based on single factor statistics and multivariate analysis. Practical application in the Jiyang Depression shows that the prediction from the quantitative analysis model for the hydrocarbon distribution threshold agree well with the actual exploration results, indicating that the quantitative analysis model is likely to be a feasible tool.展开更多
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We propose genuine （k, m）-threshold controlling schemes for controlled teleportation via multi-particle entangled states, where the teleportation of a quantum state from a sender （Alice） to a receiver （Bob） is under the control of m supervisors such that k （k≤ m） or more of these supervisors can help Bob recover the transferred state. By construction, anyone of our quantum channels is a genuine multipartite entangled state of which any two parts are inseparable. Their properties are compared and contrasted with those of the well-known GHZ, W, and linear cluster states, and also several other genuine multipartite entangled states recently introduced in the literature.
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-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control 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 for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen （EPR） pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.
基金the National High Technology Research and Development Program (863) of China (No.2007AA02Z452) the National Natural Science Foundation of China (Nos.30570511 and 30770589)
文摘Since Tian Jun proposed the difference expansion embedding technique,based on which,many reversible watermarking techniques were proposed.However,these methods do not perform well when the payload is high.In this paper,we proposed an expandable difference threshold controlled scheme for these three methods.Experiments show that our scheme improves the performance of these three methods for heavy payload.
文摘With the simultaneous rise of energy costs and demand for cloud computing, efficient control of data centers becomes crucial. In the data center control problem, one needs to plan at every time step how many servers to switch on or off in order to meet stochastic job arrivals while trying to minimize electricity consumption. This problem becomes particularly challenging when servers can be of various types and jobs from different classes can only be served by certain types of server, as it is often the case in real data centers. We model this problem as a robust Markov decision process(i.e., the transition function is not assumed to be known precisely). We give sufficient conditions(which seem to be reasonable and satisfied in practice) guaranteeing that an optimal threshold policy exists. This property can then be exploited in the design of an efficient solving method, which we provide.Finally, we present some experimental results demonstrating the practicability of our approach and compare with a previous related approach based on model predictive control.
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.
文摘目的建立测定艾司唑仑原料中基因毒性杂质甲醛的柱前衍生高效液相色谱方法,考察国内4家企业艾司唑仑原料中甲醛含量水平。方法色谱柱为CAPCELL PAK C8柱,流动相为水-乙腈(60:40),流速为1.0 mL/min,检测波长为360 nm,柱温为30℃,进样量为10μL。结果甲醛2,4-二硝基苯腙在浓度0.05~1μg/mL范围内与峰面积线性关系良好(r=0.9998);检测限和定量限分别为6和20μg/g;进样精密度和重复性试验的RSD分别为0.2%和1.4%(n=6);平均加样回收率为101.8%,RSD为0.8%(n=6)。1家企业的2批原料中甲醛含量远超过控制阈值,另外5批原料中甲醛含量均小于定量限。结论建立的甲醛测定方法准确度高,灵敏度强。建议甲醛含量超过控制阈值的生产企业制定合理的控制策略。
文摘The idea of this work arises from the analysis of the researches developed in the literature on topic of ownership and control that are mostly based on threshold of ownership stake to determine control equal for all companies and, in most cases, not supported by theoretical arguments and empirical evidences. In fact, the aim of this paper is to build a new method of determining the threshold of ownership stake that allows the shareholder to exercise control. In particular, this survey uses all Italian listed companies as reference, and the minutes of the Ordinary and Extraordinary General Meetings of shareholders, in 2009-2012, as database. The topic can be enriched with further and future researches aiming to adapt this new method in a cross-country investigation and so to identify the different threshold for the countries, on the basis of the different national laws regarding the ownership stakes that affect the control.
文摘Objective: to explore the risk factors of diabetic nephropathy caused by diabetic patients and the critical value of blood pressure that patients need to control. Methods: 74 patients with diabetic nephropathy who received treatment in our hospital from March 2019 to March 2020 were selected. After the patients were admitted to our hospital, the medical staff first thoroughly understood the patient's physical condition. The 74 patients were divided into group F as a reference and group Y for observation according to the patient's condition. The patients in group F were determined to have the disease as non-diabetic nephropathy according to the clinical detection standard. Group Y patients were identified as diabetic nephropathy patients according to the clinical diagnostic criteria. The clinical data of the patients were analyzed in detail. The patient's age, onset course and related indicators were recorded and compared. The risk factors of diabetic nephropathy were determined based on regression analysis. The protective factor is high density lipoprotein, and other factors are irrelevant. The critical blood pressure values of the patients were 137.6mmhg and 78.01mmhg respectively. Conclusion: the analysis of the risk factors of diabetic nephropathy. The risk factors of diabetic nephropathy should be controlled scientifically and the critical value of blood pressure should be strictly controlled to delay the development of the patient's condition.
文摘随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模式下的控制性能评价标准(control performance standard,CPS)标准,通过频率偏差系数来确定各控制区的考核阈值,却未考虑各控制区客观电源结构的影响,在高比例新能源电力系统中的不适应性日益凸显。首先分析了现有CPS标准的前提条件与内涵,揭示了CPS标准在高比例新能源电力系统中的不适应性,进而提出了控制区固有区域控制偏差(area control area,ACE)标准差的概念,利用固有ACE标准差确定考核阈值,提出了CPS标准的改进方法,并与原有CPS标准进行了对比。最后通过算例分析,验证了所提出改进标准比原有CPS标准更加公平合理。
文摘To carry out the deep space exploration tasks near Sun-Earth Libration point L2, the CRTBP dynamic model was built up and the numerical conditional quasi-periodic orbit （Lissajons orbit） was computed near L2. Then, a formation controller was designed with linear matrix inequality to overcome the difficuhy of parameter tuning. To meet the demands of formation accuracy and present thruster＇s capability, a threshold scheme was adopted for formation control. Finally, some numerical simulations and analysis were completed to demonstrate the feasibility of the proposed control strategy.
基金Project supported by the National Natural Science Foundation of China （Grant No 60472018）.
文摘In this paper, by using properties of quantum controlled-not manipulation and entanglement states, we have designed a novel （2, 3） quantum threshold scheme based on the Greenberger- Horne -Zeilinger （GHZ） state. The proposed scheme involves two phases, i.e. a secret sharing phase and a secret phase. Detailed proofs show that the proposed scheme is of unconditional security. Since the secret is shared among three participants, the proposed scheme may be applied to quantum key distribution and secret sharing.
基金supported by the National Natural Science Foundation Project(Grant No.41102085)the National Key Basic Research and Development 973 Program Project(Grant No.2011CB201105)+1 种基金Supported by Research Fund for the Doctoral Program of Higher Education of China(20110007120001)Supported by Science Foundation of China University of Petroleum, Beijing(No.KYJJ2012-01-08)
文摘Hydrocarbon source rock obviously controls the formation and distribution of hydrocarbon reservoirs. Based on the geological concept of ＂source control theory＂, the concept of a hydrocarbon distribution threshold was put forward. This means the maximum range for hydrocarbon controlled by the source rock conditions to migrate in the hydrocarbon basins. Three quantitative analysis models are proposed on this basis, namely the hydrocarbon accumulation probability, maximum hydrocarbon scale threshold and reserve distribution probability, which respectively refer to the probability of forming a hydrocarbon reservoir, the possible maximum scale of the hydrocarbon reservoir and the percentage of reserve distribution in a certain area within the hydrocarbon distribution threshold. Statistical analysis on 539 hydrocarbon reservoirs discovered in 28 hydrocarbon source kitchens from seven sedimentary basins and sags of eastern China shows the maximum reservoir scale possibly formed in the hydrocarbon basin, hydrocarbon accumulation probability and oil and gas reserve distribution probability are all controlled by the characteristics of the hydrocarbon source rock. Generally, as the distances from the hydrocarbon source rock center and hydrocarbon discharge boundary get longer and the hydrocarbon discharge intensity of hydrocarbon source rock center gets smaller, there will be lower probability of hydrocarbon accumulation. Corresponding quantitative models are established based on single factor statistics and multivariate analysis. Practical application in the Jiyang Depression shows that the prediction from the quantitative analysis model for the hydrocarbon distribution threshold agree well with the actual exploration results, indicating that the quantitative analysis model is likely to be a feasible tool.
