CN104732829A - Mobile network teaching system based on Android platform - Google Patents

Abstract

The invention discloses a mobile network teaching system based on an Android platform. The mobile network teaching system complied in the Java language runs in a Dalvik virtual machine specially optimized for cellphones. The mobile network teaching system comprises an RSS-based online reading subsystem module, a communication subsystem module based on jabber and mobile E-mail, a GPS-based (global positioning system-based) spatial position subsystem module, and a DB40-based contacts subsystem module; the RSS-based online reading subsystem module is used for providing a cellphone user with online resources for calling and reading; the communication subsystem module is used for providing the cellphone user with a data connection, allowing the cellphone user to enter the system to perform corresponding operations; the GPS-based spatial position subsystem module is used for positioning the cellphone user and providing corresponding system teaching; the DB40-based contacts subsystem module is used for forming information recording by the system for the cellphone user and providing the cellphone user with services. Compared with the prior art, the mobile network teaching system allows efficient and accurate mobile network teaching for Android cellphones.

Description

Based on mobile network's tutoring system of Android platform

Technical field

The present invention relates to a kind of mobile network's tutoring system, be specifically related to a kind of mobile network's tutoring system based on Android platform.

Background technology

At present, networking and informationization make Modern Higher Education be faced with huge change, and network teaching management system is networking and the information-based important content developed in College Modern Educational and Technological technology and modern information technologies, more and more positive role is highlighted in the education activities of colleges and universities, school can utilize network teaching management system, build good Digital Teaching environment, constantly change teaching idea, teaching pattern and the content of courses, thus improve the quality level of teaching.Student can utilize net work teaching system, plans best study plan, utilizes the e-learning time fully, improves the independent learning ability of self.Up to the present; network teaching management system development rapidly; have document to show to have school's independent development network teaching management system of 15%, have 85% school or with commercial company's cooperation customized development network teaching management system, or purchase commercialization platform to commercial company.Meanwhile, domestic and international many people in the industry did a lot of discussion in this respect, and achieved corresponding achievement.

But the development time due to network teaching management system is not very long, and system comes with some shortcomings in actual process of construction and use.Along with the development of current mobile technology, the use amount of mobile terminal gets more and more, mobile learning based on mobile terminal is more and more taken seriously, Chinese scholars are done a lot of work based on Windows Mobile, Symbian system and Wap, J2ME platform etc., but the mobile learning under android system needs to be studied further.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of can for the mobile network's tutoring system based on Android platform of Android system mobile phone mobile learning.

In order to achieve the above object, technical scheme of the present invention is as follows:

Based on mobile network's tutoring system of Android platform, its adopt Java language to write and operate in aim at mobile phone optimize Dalvik virtual machine on, this system comprises:

Based on the online reading subsystem module of RSS, for providing transferring and reading of online resource to cellphone subscriber;

Based on the communications subsystem module of Jabber and mobile E-mail, for providing the connection of data to cellphone subscriber, cellphone subscriber can enter system and operate accordingly;

Based on the locus subsystem module of GPS, for the position of locating cellphone user, to provide corresponding systematic teaching;

Based on the address list subsystem module of DB40, for the formation of the Data Enter of system to cellphone subscriber, to provide service to cellphone subscriber.

The present invention is by above-mentioned set subsystems module, coordinate the function of Dalvik virtual machine and Java language, achieve and there is several functions and the net work teaching system that can realize Android mobile phone mobile learning object, make the Mobile Teaching for Android mobile phone become possibility.Therefore, it is compared to prior art, and the mobile network that can efficiently and exactly realize for Android platform mobile phone imparts knowledge to students.

On the basis of technique scheme, the present invention can also do following improvement:

As preferred scheme, the above-mentioned mobile network's tutoring system based on Android platform is also provided with the function optimization module based on genetic algorithm, this function optimization module sets up the first function model for video distortion function, the second function model based on mathematical model is set up again based on this first function model, and the constraint condition set up for optimizing, then based on genetic algorithm, this second function model is solved, thus the quality of data stream transmitting is optimized.

Adopt above-mentioned preferred scheme, also adopt the mode setting up multiple function model to improve the transmission quality of data stream based on genetic algorithm, thus reduce the packet loss of Internet Transmission.The random video topology bit error rate experimental result of carrying out in the present system shows, compared with native system algorithm and exhaust algorithm (can think transmit true value close to data), average error rate is 0.81%, maximum bit error rate is 0.99%, minimum bit-error rate is only 0.51%, and therefore native system can be real-time, interactive and provides Reliable guarantee.

As preferred scheme, the first above-mentioned function model is:

D _dec＝D _enc+D _loss+D _cgn(1)

$D_{\mathrm{dec}}=D_0+\frac{\mathrm{\ω}}{R_{\mathrm{enc}}+R_0}---\left(2\right)$

D _loss＝k·Loss ^e2e(3)

D _cng＝k·(1-Loss ^e2e)·Prob(Delay ^e2e＞T) (4)；

Second function model is:

$D=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v{D}_v^{\mathrm{dec}}=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v\left\{\begin{array}{c}(D_v^0+\frac{{\mathrm{\ω}}_v}{R_v^{\mathrm{enc}}-R_v^0})\\ +k_v\·{{\mathrm{Loss}}_v}^{e2e}\\ +k_v\·(1-{{\mathrm{Loss}}_v}^{e2e})\·\mathrm{Prob}({{\mathrm{Delay}}_v}^{e2e}>T_v)\end{array}\right\};$

Constraint condition is:

λ _ij≤0.85；{i，j}∈L

$R_v\≥R_v^{\min };v\∈V$

Solution procedure is:

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v-\underset{k:\{k,i\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ki}}^v=\left\{\begin{array}{c}1,i=s_v\\ -1,i=d_v\\ 0,\mathrm{otherwise}\end{array}\right\}$

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v\left\{\begin{array}{c}\≤1,i\≠d_v\\ =0,i=d_v\end{array}\right..$

Adopt above-mentioned preferred scheme, the transmission quality of data stream can be improved further.

As preferred scheme, the above-mentioned mobile network's tutoring system based on Android platform also carries out data transmission by a kind of cryptographic protocol based on Bilinear Pairing function, it utilizes Bilinear Pairing, suppose an additive group and a multiplicative group, the discrete logarithm problem that additive group and multiplicative group are assumed to be wherein is difficult to resolve, then additive group and multiplicative group is met the mapping of the feature of bilinearity, non-degenerative type and calculability.

Adopt above-mentioned preferred scheme, by the form of Bilinear Pairing function, utilize the discrete logarithm of additive group and multiplicative group and the mode of mapping, effectively improve the Information Security of native system when data interaction.

As preferred scheme, above-mentioned additive group is: suppose that G1 is the additive group generated by G, and its order is prime number q; Multiplicative group is: suppose that G2 be rank is the multiplicative group of q, make a, b is element; Suppose that discrete logarithm problem (DLP) is difficult to resolve in G1 and G2, a Bilinear map is the mapping e:G meeting features for a pair ₁× G ₁→ G ₂:

1) bilinearity: e (aP, bQ)=e (P, Q) ^ab;

2) non-degeneracy: there is P, Q ∈ G1 makes e (P, Q) ≠ 1;

3), there is effective algorithm to calculate e (P, Q) in calculability: for all P, Q ∈ G1.

Adopt above-mentioned preferred scheme, the Information Security of native system when data interaction can be improved further.

As preferred scheme, the above-mentioned mobile network's tutoring system based on Android platform and mobile phone are equipped with password code and password counter.

Adopt above-mentioned preferred scheme, the Information Security of native system when data interaction can be improved again further.

Accompanying drawing explanation

Fig. 1 is the Organization Chart of the mobile network's tutoring system based on Android platform of the present invention.

Fig. 2 is the implementing procedure figure based on genetic algorithm part involved in mobile network's tutoring system of Android platform of the present invention.

Fig. 3 is the implementing procedure figure based on Bilinear Pairing encryption section involved in mobile network's tutoring system of Android platform of the present invention.

Embodiment

The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.

In order to reach object of the present invention, as shown in Figure 1, in the some of them embodiment of the mobile network's tutoring system based on Android platform of the present invention, its adopt Java language to write and operate in aim at mobile phone optimize Dalvik virtual machine on, this system comprises: based on the online reading subsystem module of RSS, for providing transferring and reading of online resource to cellphone subscriber; Based on the communications subsystem module of Jabber and mobile E-mail, for providing the connection of data to cellphone subscriber, cellphone subscriber can enter system and operate accordingly; Based on the locus subsystem module of GPS, for the position of locating cellphone user, to provide corresponding systematic teaching; Based on the address list subsystem module of DB40, for the formation of the Data Enter of system to cellphone subscriber, to provide service to cellphone subscriber.

Native system is by above-mentioned set subsystems module, coordinate the function of Dalvik virtual machine and Java language, achieve and there is several functions and the net work teaching system that can realize Android mobile phone mobile learning object, make the Mobile Teaching for Android mobile phone become possibility.Therefore, it is compared to prior art, and the mobile network that can efficiently and exactly realize for Android platform mobile phone imparts knowledge to students.

In order to optimize implementation result of the present invention further, as shown in Figure 1-2, in other embodiments of the mobile network's tutoring system based on Android platform of the present invention, on the basis of the above, the above-mentioned mobile network's tutoring system based on Android platform is also provided with the function optimization module based on genetic algorithm, this function optimization module sets up the first function model (step S11) for video distortion function, the second function model based on mathematical model is set up again based on this first function model, and the constraint condition (step S12) set up for optimizing, then based on genetic algorithm, this second function model is solved (step S13), thus the quality of data stream transmitting is optimized.Adopt the scheme of this embodiment, also adopt the mode setting up multiple function model to improve the transmission quality of data stream based on genetic algorithm, thus reduce the packet loss of Internet Transmission.The random video topology bit error rate experimental result of carrying out in the present system shows, compared with native system algorithm and exhaust algorithm (can think transmit true value close to data), average error rate is 0.81%, maximum bit error rate is 0.99%, minimum bit-error rate is only 0.51%, and therefore native system can be real-time, interactive and provides Reliable guarantee.

In order to optimize implementation result of the present invention further, in other embodiments of the mobile network's tutoring system based on Android platform of the present invention, on the basis of the above, the first above-mentioned function model is:

D _dec＝D _enc+D _loss+D _cgn(1)

$D_{\mathrm{dec}}=D_0+\frac{\mathrm{\ω}}{R_{\mathrm{enc}}+R_0}---\left(2\right)$

D _loss＝k·Loss ^e2e(3)

D _cng＝k·(1-Loss ^e2e)·Prob(Delay ^e2e＞T) (4)；

Second function model is:

$D=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v{D}_v^{\mathrm{dec}}=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v\left\{\begin{array}{c}(D_v^0+\frac{{\mathrm{\ω}}_v}{R_v^{\mathrm{enc}}-R_v^0})\\ +k_v\·{{\mathrm{Loss}}_v}^{e2e}\\ +k_v\·(1-{{\mathrm{Loss}}_v}^{e2e})\·\mathrm{Prob}({{\mathrm{Delay}}_v}^{e2e}>T_v)\end{array}\right\};$

Constraint condition is:

λ _ij≤0.85；{i，j}∈L

$R_v\≥R_v^{\min };v\∈V$

Solution procedure is:

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v-\underset{k:\{k,i\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ki}}^v=\left\{\begin{array}{c}1,i=s_v\\ -1,i=d_v\\ 0,\mathrm{otherwise}\end{array}\right\}$

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v\left\{\begin{array}{c}\≤1,i\≠d_v\\ =0,i=d_v\end{array}\right..$ Adopt the scheme of this embodiment, the transmission quality of data stream can be improved further.

In order to optimize implementation result of the present invention further, as shown in figs. 1 and 3, in other embodiments of the mobile network's tutoring system based on Android platform of the present invention, on the basis of the above, the above-mentioned mobile network's tutoring system based on Android platform is also provided with Transmission Encryption module, data transmission is carried out by a kind of cryptographic protocol based on Bilinear Pairing function, it utilizes Bilinear Pairing, suppose an additive group and a multiplicative group (step S21), (the step S22) be difficult to resolve by additive group and the multiplicative group discrete logarithm problem be assumed to be wherein, then additive group and multiplicative group are met bilinearity, the mapping (step S23) of the feature of non-degenerative type and calculability.Adopt the scheme of this embodiment, by the form of Bilinear Pairing function, utilize the discrete logarithm of additive group and multiplicative group and the mode of mapping, effectively improve the Information Security of native system when data interaction.

In order to optimize implementation result of the present invention further, in other embodiments of the mobile network's tutoring system based on Android platform of the present invention, on the basis of the above, above-mentioned additive group is: suppose that G1 is the additive group generated by G, and its order is prime number q; Multiplicative group is: suppose that G2 be rank is the multiplicative group of q, make a, b is element; Suppose that discrete logarithm problem (DLP) is difficult to resolve in G1 and G2, a Bilinear map is the mapping e:G meeting features for a pair ₁× G ₁→ G ₂:

1) bilinearity: e (aP, bQ)=e (P, Q) ^ab;

2) non-degeneracy: there is P, Q ∈ G1 makes e (P, Q) ≠ 1;

3), there is effective algorithm to calculate e (P, Q) in calculability: for all P, Q ∈ G1.Adopt the scheme of this embodiment, the Information Security of native system when data interaction can be improved further.

In order to optimize implementation result of the present invention further, in other embodiments of the mobile network's tutoring system based on Android platform of the present invention, on the basis of the above, the above-mentioned mobile network's tutoring system based on Android platform and mobile phone are equipped with password code and password counter.Adopt the scheme of this embodiment, the Information Security of native system when data interaction can be improved again further.

Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (6)

1. based on mobile network's tutoring system of Android platform, it is characterized in that, described system adopts Java language to write and operates in and aims on Dalvik virtual machine that mobile phone optimizes, and described system comprises:

Based on the online reading subsystem module of RSS, for providing transferring and reading of online resource to cellphone subscriber;

Based on the communications subsystem module of Jabber and mobile E-mail, for providing the connection of data to cellphone subscriber, cellphone subscriber can enter system and operate accordingly;

Based on the locus subsystem module of GPS, for the position of locating cellphone user, to provide corresponding systematic teaching;

Based on the address list subsystem module of DB40, for the formation of the Data Enter of system to cellphone subscriber, to provide service to cellphone subscriber.

2. the mobile network's tutoring system based on Android platform according to claim 1, it is characterized in that, also be provided with the function optimization module based on genetic algorithm, described function optimization module sets up the first function model for video distortion function, the second function model based on mathematical model is set up again based on described first function model, and the constraint condition set up for optimizing, then based on genetic algorithm, the second function model is solved, thus the quality of data stream transmitting is optimized.

3. the mobile network's tutoring system based on Android platform according to claim 2, is characterized in that,

Described first function model is:

D _dec＝D _enc+D _loss+D _cgn(1)

$D_{\mathrm{dec}}=D_0+\frac{\mathrm{\ω}}{R_{\mathrm{enc}}+R_0}---\left(2\right)$

D _loss＝k·Loss ^e2e(3)

D _cng＝k·(1-Loss ^e2e)·Prob(Delay ^e2e＞T) (4)；

Described second function model is:

$D=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v{D}_v^{\mathrm{dec}}=\underset{v\∈V}{\mathrm{\Σ}}{\mathrm{\ρ}}_v\left\{\begin{array}{c}(D_v^0+\frac{{\mathrm{\ω}}_v}{R_v^{\mathrm{enc}}-R_v^0})\\ +k_v\·{{\mathrm{Loss}}_v}^{e2e}\\ +k_v\·(1-{{\mathrm{Loss}}_v}^{e2e})\·\mathrm{Prob}({{\mathrm{Delay}}_v}^{e2e}>T_v)\\ \end{array}\right\};$

Described constraint condition is:

λ _ij≤0.85；{i，j}∈L

$R_v\≥R_v^{\min };v\∈V$

Solution procedure is:

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v-\underset{k:\{k,i\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ki}}^v=\left\{\begin{array}{c}1,i=s_v\\ -1,i=d_v\\ 0,\mathrm{otherwise}\end{array}\right\}$

$\underset{j:\{i,j\}\∈L}{\mathrm{\Σ}}{x}_{\mathrm{ij}}^v\left\{\begin{array}{c}\≤1,i\≠d_v\\ =0,i=d_v\end{array}\right..$

4. the mobile network's tutoring system based on Android platform according to claim 1, it is characterized in that, described system also carries out data transmission by a kind of cryptographic protocol based on Bilinear Pairing function, it utilizes Bilinear Pairing, suppose an additive group and a multiplicative group, the discrete logarithm problem that described additive group and multiplicative group are assumed to be wherein is difficult to resolve, then described additive group and multiplicative group is met the mapping of the feature of bilinearity, non-degenerative type and calculability.

5. the mobile network's tutoring system based on Android platform according to claim 4, it is characterized in that, described additive group is: suppose that G1 is the additive group generated by G, and its order is prime number q; Described multiplicative group is: suppose that G2 be rank is the multiplicative group of q, make a, b is element; Suppose that discrete logarithm problem (DLP) is difficult to resolve in G1 and G2, a Bilinear map is the mapping e:G meeting features for a pair ₁× G ₁→ G ₂:

1) described bilinearity: e (aP, bQ)=e (P, Q) ^ab;

2) described non-degeneracy: there is P, Q ∈ G1 makes e (P, Q) ≠ 1;

3), there is effective algorithm to calculate e (P, Q) in described calculability: for all P, Q ∈ G1.

6. the mobile network's tutoring system based on Android platform according to claim 4 or 5, is characterized in that, described system and described mobile phone are equipped with password code and password counter.